Mercurial > hg > nginx-site
annotate xml/en/docs/njs/reference.xml @ 2570:44792f1ee284
Added IDs to methods in njs Reference.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Thu, 16 Jul 2020 08:22:37 +0100 |
parents | 2edc64c05b0e |
children | 3e47eecce384 |
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) Nginx, Inc. |
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5 --> |
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6 |
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7 <!DOCTYPE article SYSTEM "../../../../dtd/article.dtd"> |
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8 |
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9 <article name="Reference" |
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10 link="/en/docs/njs/reference.html" |
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11 lang="en" |
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12 rev="47"> |
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13 |
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14 <section id="summary"> |
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15 |
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16 <para> |
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17 <link doc="index.xml">njs</link> provides objects, methods and properties |
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18 for extending nginx functionality. |
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19 </para> |
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20 |
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21 <para> |
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22 This reference contains only njs specific properties, methods and modules |
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23 not compliant with ECMAScript. |
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24 Definitions of njs properties and methods compliant with ECMAScript |
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25 can be found in |
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26 <link url="http://www.ecma-international.org/ecma-262/">ECMAScript |
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27 specification</link>. |
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28 List of all njs properties and methods can be found in |
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29 <link doc="compatibility.xml">Compatibility</link>. |
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30 </para> |
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31 |
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32 </section> |
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33 |
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34 |
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35 <section id="http_stream" name="nginx objects"> |
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36 |
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37 |
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38 <section id="http" name="HTTP Request"> |
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39 |
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40 <para> |
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41 The HTTP request object is available only in the |
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42 <link doc="../http/ngx_http_js_module.xml">ngx_http_js_module</link> module. |
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43 All string properties of the object are |
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44 <link id="string">byte strings</link>. |
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45 |
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46 <list type="tag"> |
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47 |
2353 | 48 <tag-name id="r_args"><literal>r.args{}</literal></tag-name> |
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49 <tag-desc> |
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50 request arguments object, read-only |
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51 </tag-desc> |
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52 |
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53 <tag-name id="r_error"><literal>r.error(<value>string</value>)</literal></tag-name> |
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54 <tag-desc> |
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55 writes a <literal>string</literal> to the error log |
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56 on the <literal>error</literal> level of logging |
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57 </tag-desc> |
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58 |
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59 <tag-name id="r_finish"><literal>r.finish()</literal></tag-name> |
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60 <tag-desc> |
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61 finishes sending a response to the client |
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62 </tag-desc> |
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63 |
2353 | 64 <tag-name id="r_headers_in"><literal>r.headersIn{}</literal></tag-name> |
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65 <tag-desc> |
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66 incoming headers object, read-only. |
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67 <para> |
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68 The <literal>Foo</literal> request header |
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69 can be accessed with the syntax: |
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70 <literal>headersIn.foo</literal> or <literal>headersIn['Foo']</literal>. |
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71 </para> |
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72 |
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73 <para> |
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74 The |
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75 <header>Authorization</header>, |
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76 <header>Content-Length</header>, |
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77 <header>Content-Range</header>, |
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78 <header>Content-Type</header>, |
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79 <header>ETag</header>, |
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80 <header>Expect</header>, |
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81 <header>From</header>, |
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82 <header>Host</header>, |
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83 <header>If-Match</header>, |
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84 <header>If-Modified-Since</header>, |
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85 <header>If-None-Match</header>, |
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86 <header>If-Range</header>, |
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87 <header>If-Unmodified-Since</header>, |
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88 <header>Max-Forwards</header>, |
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89 <header>Proxy-Authorization</header>, |
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90 <header>Referer</header>, |
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91 <header>Transfer-Encoding</header>, and |
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92 <header>User-Agent</header> |
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93 request headers can have only one field value |
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94 (<link doc="changes.xml" id="njs0.4.1">0.4.1</link>). |
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95 Duplicate field values in <header>Cookie</header> headers |
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96 are separated by semicolon (<literal>;</literal>). |
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97 Duplicate field values in all other request headers are separated by commas. |
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98 </para> |
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99 </tag-desc> |
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100 |
2331 | 101 <tag-name id="r_headers_out"><literal>r.headersOut{}</literal></tag-name> |
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102 <tag-desc> |
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103 outgoing headers object, writable. |
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104 <para> |
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105 The <header>Foo</header> response header |
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106 can be accessed with the syntax: |
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107 <literal>headersOut.foo</literal> or <literal>headersOut['Foo']</literal>. |
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108 </para> |
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109 |
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110 <para> |
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111 Field values of multi-value response headers |
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112 (<link doc="changes.xml" id="njs0.4.0">0.4.0</link>) |
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113 can be set with the syntax: |
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114 <example> |
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115 r.headersOut['Foo'] = ['a', 'b'] |
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116 </example> |
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117 where the output will be: |
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118 <example> |
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119 Foo: a |
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120 Foo: b |
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121 </example> |
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122 All previous field values of the <header>Foo</header> response header |
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123 will be deleted. |
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124 </para> |
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125 |
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126 <para> |
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127 For standard response headers |
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128 that accept only a single field value such as |
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129 <header>Content-Type</header>, |
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130 only the last element of the array will take effect. |
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131 Field values of the <header>Set-Cookie</header> response header |
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132 are always returned as an array. |
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133 Duplicate field values in |
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134 <header>Age</header>, |
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135 <header>Content-Encoding</header>, |
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136 <header>Content-Length</header>, |
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137 <header>Content-Type</header>, |
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138 <header>ETag</header>, |
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139 <header>Expires</header>, |
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140 <header>Last-Modified</header>, |
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141 <header>Location</header>, |
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142 <header>Retry-After</header> |
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143 response headers are ignored. |
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144 Duplicate field values in all other response headers |
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145 are separated by commas. |
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146 </para> |
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147 </tag-desc> |
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148 |
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149 <tag-name id="r_http_version"><literal>r.httpVersion</literal></tag-name> |
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150 <tag-desc> |
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151 HTTP version, read-only |
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152 </tag-desc> |
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153 |
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154 <tag-name id="r_internal_redirect"><literal>r.internalRedirect(<value>uri</value>)</literal></tag-name> |
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155 <tag-desc> |
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156 performs an internal redirect to the specified <literal>uri</literal>. |
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157 If the uri starts with the “<literal>@</literal>” prefix, |
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158 it is considered a named location. |
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159 The actual redirect happens after the handler execution is completed. |
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160 </tag-desc> |
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161 |
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162 <tag-name id="r_log"><literal>r.log(<value>string</value>)</literal></tag-name> |
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163 <tag-desc> |
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164 writes a <literal>string</literal> to the error log |
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165 on the <literal>info</literal> level of logging |
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166 </tag-desc> |
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167 |
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168 <tag-name id="r_method"><literal>r.method</literal></tag-name> |
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169 <tag-desc> |
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170 HTTP method, read-only |
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171 </tag-desc> |
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172 |
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173 <tag-name id="r_parent"><literal>r.parent</literal></tag-name> |
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174 <tag-desc> |
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175 references the parent request object |
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176 </tag-desc> |
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177 |
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178 <tag-name id="r_remote_address"><literal>r.remoteAddress</literal></tag-name> |
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179 <tag-desc> |
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180 client address, read-only |
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181 </tag-desc> |
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182 |
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183 <tag-name id="r_raw_headers_in"><literal>r.rawHeadersIn{}</literal></tag-name> |
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184 <tag-desc> |
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185 returns an array of key-value pairs |
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186 exactly as they were received from the client |
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187 (<link doc="changes.xml" id="njs0.4.1">0.4.1</link>). |
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188 <para> |
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189 For example, with the following request headers: |
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190 <example> |
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191 Host: localhost |
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192 Foo: bar |
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193 foo: bar2 |
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194 </example> |
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195 the output of <literal>r.rawHeadersIn</literal> will be: |
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196 <example> |
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197 [ |
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198 ['Host', 'localhost'], |
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199 ['Foo', 'bar'], |
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200 ['foo', 'bar2'] |
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201 ] |
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202 </example> |
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203 All <literal>foo</literal> headers |
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204 can be collected with the syntax: |
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205 <example> |
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206 r.rawHeadersIn.filter(v=>v[0].toLowerCase() == 'foo').map(v=>v[1]) |
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207 </example> |
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208 the output will be: |
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209 <example> |
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210 ['bar', 'bar2'] |
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211 </example> |
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212 Header field names are not converted to lower case, |
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213 duplicate field values are not merged. |
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214 </para> |
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215 </tag-desc> |
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216 |
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217 <tag-name id="r_raw_headers_out"><literal>r.rawHeadersOut{}</literal></tag-name> |
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218 <tag-desc> |
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219 returns an array of key-value pairs of response headers |
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220 (<link doc="changes.xml" id="njs0.4.1">0.4.1</link>). |
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221 Header field names are not converted to lower case, |
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222 duplicate field values are not merged. |
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223 </tag-desc> |
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224 |
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225 <tag-name id="r_request_body"><literal>r.requestBody</literal></tag-name> |
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226 <tag-desc> |
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227 returns the client request body if it has not been |
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228 written to a temporary file. |
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229 To ensure that the client request body is in memory, |
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230 its size should be limited by |
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231 <link doc="../http/ngx_http_core_module.xml" id="client_max_body_size"/>, |
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232 and a sufficient buffer size should be set using |
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233 <link doc="../http/ngx_http_core_module.xml" id="client_body_buffer_size"/>. |
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234 The property is available only in the |
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235 <link doc="../http/ngx_http_js_module.xml" id="js_content"/> directive. |
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236 </tag-desc> |
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237 |
2353 | 238 <tag-name id="r_response_body"><literal>r.responseBody</literal></tag-name> |
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239 <tag-desc> |
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240 holds the <link id="r_subrequest">subrequest</link> response body, read-only. |
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241 The size of <literal>r.responseBody</literal> is limited by the |
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242 <link doc="../http/ngx_http_core_module.xml" id="subrequest_output_buffer_size"/> |
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243 directive. |
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244 </tag-desc> |
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245 |
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246 <tag-name id="r_return"><literal>r.return(status[, string])</literal></tag-name> |
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247 <tag-desc> |
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248 sends the entire response |
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249 with the specified <literal>status</literal> to the client |
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250 <para> |
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251 It is possible to specify either a redirect URL |
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252 (for codes 301, 302, 303, 307, and 308) |
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253 or the response body text (for other codes) as the second argument |
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254 </para> |
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255 </tag-desc> |
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256 |
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257 <tag-name id="r_send"><literal>r.send(<value>string</value>)</literal></tag-name> |
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258 <tag-desc> |
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259 sends a part of the response body to the client |
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260 </tag-desc> |
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261 |
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262 <tag-name><literal>r.sendHeader()</literal></tag-name> |
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263 <tag-desc> |
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264 sends the HTTP headers to the client |
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265 </tag-desc> |
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266 |
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267 <tag-name id="r_status"><literal>r.status</literal></tag-name> |
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268 <tag-desc> |
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269 status, writable |
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270 </tag-desc> |
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271 |
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272 <tag-name id="r_subrequest"><literal>r.subrequest(<value>uri</value>[, |
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273 <value>options</value>[, <value>callback</value>]])</literal></tag-name> |
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274 <tag-desc> |
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275 creates a subrequest with the given <literal>uri</literal> and |
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276 <literal>options</literal>, and installs |
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277 an optional completion <literal>callback</literal>. |
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278 |
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279 <para> |
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280 A |
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281 <link doc="../dev/development_guide.xml.xml" id="http_subrequests">subrequest</link> |
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282 shares its input headers with the client request. |
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283 To send headers different from original headers to a proxied server, the |
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284 <link doc="../http/ngx_http_proxy_module.xml" id="proxy_set_header"/> |
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285 directive can be used. |
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286 To send a completely new set of headers to a proxied server, the |
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287 <link doc="../http/ngx_http_proxy_module.xml" id="proxy_pass_request_headers"/> |
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288 directive can be used. |
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289 </para> |
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290 |
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291 <para> |
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292 If <literal>options</literal> is a string, then it |
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293 holds the subrequest arguments string. |
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294 Otherwise, <literal>options</literal> is expected to be |
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295 an object with the following keys: |
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296 <list type="tag"> |
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297 <tag-name><literal>args</literal></tag-name> |
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298 <tag-desc> |
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299 arguments string, by default an empty string is used |
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300 </tag-desc> |
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301 <tag-name><literal>body</literal></tag-name> |
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302 <tag-desc> |
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303 request body, |
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304 by default the request body of the parent request object is used |
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305 </tag-desc> |
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306 |
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307 <tag-name><literal>method</literal></tag-name> |
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308 <tag-desc> |
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309 HTTP method, by default the <literal>GET</literal> method is used |
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310 </tag-desc> |
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311 |
2507 | 312 <tag-name><literal>detached</literal></tag-name> |
313 <tag-desc> | |
314 boolean flag (<link doc="changes.xml" id="njs0.3.9">0.3.9</link>), | |
315 if <literal>true</literal>, the created subrequest is a detached subrequest. | |
316 Responses to detached subrequests are ignored. | |
317 Unlike ordinary subrequests, a detached subrequest | |
318 can be created inside a variable handler. | |
319 The detached flag and callback argument are mutually exclusive. | |
320 </tag-desc> | |
321 | |
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322 </list> |
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323 </para> |
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324 |
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325 <para> |
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326 The completion <literal>callback</literal> receives |
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327 a subrequest response object with methods and properties |
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328 identical to the parent request object. |
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329 </para> |
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330 |
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331 <para> |
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332 Since <link doc="changes.xml" id="njs0.3.8">0.3.8</link>, |
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333 if a <literal>callback</literal> is not provided, |
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334 the <literal>Promise</literal> object |
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335 that resolves to the subrequest response object is returned. |
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336 </para> |
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337 </tag-desc> |
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338 |
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339 <tag-name id="r_uri"><literal>r.uri</literal></tag-name> |
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340 <tag-desc> |
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341 current <link doc="../http/ngx_http_core_module.xml" id="var_uri">URI</link> |
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342 in request, |
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343 <link doc="../http/ngx_http_core_module.xml" id="location">normalized</link>, |
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344 read-only |
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345 </tag-desc> |
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346 |
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347 <tag-name id="r_variables"><literal>r.variables{}</literal></tag-name> |
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348 <tag-desc> |
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349 nginx variables object, |
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350 writable (since <link doc="changes.xml" id="njs0.2.8">0.2.8</link>) |
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351 </tag-desc> |
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352 |
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353 <tag-name id="r_warn"><literal>r.warn(<value>string</value>)</literal></tag-name> |
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354 <tag-desc> |
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355 writes a <literal>string</literal> to the error log |
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356 on the <literal>warning</literal> level of logging |
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357 </tag-desc> |
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358 |
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359 </list> |
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360 </para> |
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361 |
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362 </section> |
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363 |
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364 |
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365 <section id="stream" name="Stream Session"> |
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366 |
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367 <para> |
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368 The stream session object is available only in the |
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369 <link doc="../stream/ngx_stream_js_module.xml">ngx_stream_js_module</link> |
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370 module. |
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371 All string properties of the object are <link id="string">byte strings</link>. |
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372 </para> |
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373 |
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374 <para> |
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375 <list type="tag"> |
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376 |
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377 <tag-name id="s_allow"><literal>s.allow()</literal></tag-name> |
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378 <tag-desc> |
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379 successfully finalizes the phase handler |
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380 (<link doc="changes.xml" id="njs0.2.4">0.2.4</link>) |
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381 </tag-desc> |
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|
382 |
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383 <tag-name id="s_decline"><literal>s.decline()</literal></tag-name> |
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|
384 <tag-desc> |
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385 finalizes the phase handler and passes control to the next handler |
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386 (<link doc="changes.xml" id="njs0.2.4">0.2.4</link>) |
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387 </tag-desc> |
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|
388 |
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389 <tag-name id="s_deny"><literal>s.deny()</literal></tag-name> |
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|
390 <tag-desc> |
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changeset
|
391 finalizes the phase handler with the access error code |
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Updated links to changes.xml in njs Reference.
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|
392 (<link doc="changes.xml" id="njs0.2.4">0.2.4</link>) |
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393 </tag-desc> |
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|
394 |
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|
395 <tag-name id="s_done"><literal>s.done</literal>(<value>[code]</value>)</tag-name> |
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changeset
|
396 <tag-desc> |
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changeset
|
397 successfully finalizes the current phase handler |
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Created "nginx objects" section in reference.xml.
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|
398 or finalizes it with the specified numeric code |
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changeset
|
399 (<link doc="changes.xml" id="njs0.2.4">0.2.4</link>). |
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400 </tag-desc> |
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|
401 |
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|
402 <tag-name id="s_error"><literal>s.error(<value>string</value>)</literal></tag-name> |
2247
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|
403 <tag-desc> |
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changeset
|
404 writes a sent <literal>string</literal> to the error log |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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parents:
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changeset
|
405 on the <literal>error</literal> level of logging |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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changeset
|
406 </tag-desc> |
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Created "nginx objects" section in reference.xml.
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changeset
|
407 |
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Added IDs to methods in njs Reference.
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changeset
|
408 <tag-name id="s_log"><literal>s.log(<value>string</value>)</literal></tag-name> |
2247
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changeset
|
409 <tag-desc> |
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Created "nginx objects" section in reference.xml.
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changeset
|
410 writes a sent <value>string</value> to the error log |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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changeset
|
411 on the <literal>info</literal> level of logging |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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changeset
|
412 </tag-desc> |
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Created "nginx objects" section in reference.xml.
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changeset
|
413 |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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changeset
|
414 <tag-name id="s_off"><literal>s.off(<value>eventName</value>)</literal></tag-name> |
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Created "nginx objects" section in reference.xml.
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changeset
|
415 <tag-desc> |
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changeset
|
416 unregisters the callback set by the <link id="s_on">s.on()</link> method |
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Updated links to changes.xml in njs Reference.
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|
417 (<link doc="changes.xml" id="njs0.2.4">0.2.4</link>) |
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418 </tag-desc> |
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changeset
|
419 |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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changeset
|
420 <tag-name id="s_on"><literal>s.on(<value>event</value>, |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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changeset
|
421 <value>callback</value>)</literal></tag-name> |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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changeset
|
422 <tag-desc> |
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Created "nginx objects" section in reference.xml.
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parents:
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changeset
|
423 registers a <literal>callback</literal> for the specified <literal>event</literal> |
2337
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Updated links to changes.xml in njs Reference.
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|
424 (<link doc="changes.xml" id="njs0.2.4">0.2.4</link>). |
2247
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|
425 |
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Created "nginx objects" section in reference.xml.
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|
426 <para> |
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|
427 An <literal>event</literal> may be one of the following strings: |
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Created "nginx objects" section in reference.xml.
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|
428 <list type="tag"> |
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|
429 <tag-name><literal>upload</literal></tag-name> |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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parents:
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|
430 <tag-desc> |
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Created "nginx objects" section in reference.xml.
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changeset
|
431 new data from a client |
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Created "nginx objects" section in reference.xml.
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|
432 </tag-desc> |
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Created "nginx objects" section in reference.xml.
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parents:
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changeset
|
433 |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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changeset
|
434 <tag-name><literal>download</literal></tag-name> |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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parents:
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changeset
|
435 <tag-desc> |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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parents:
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changeset
|
436 new data to a client |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
437 </tag-desc> |
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Created "nginx objects" section in reference.xml.
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|
438 |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
439 </list> |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
440 </para> |
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Created "nginx objects" section in reference.xml.
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|
441 |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
442 <para> |
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Created "nginx objects" section in reference.xml.
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|
443 The completion callback has the following prototype: |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
444 <literal>callback(data, flags)</literal>, where |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
445 <literal>data</literal> is string, |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
446 <literal>flags</literal> is an object |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
447 with the following properties: |
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Created "nginx objects" section in reference.xml.
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|
448 <list type="tag"> |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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parents:
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changeset
|
449 <tag-name id="s_on_callback_last"><literal>last</literal></tag-name> |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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parents:
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changeset
|
450 <tag-desc> |
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Created "nginx objects" section in reference.xml.
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|
451 a boolean value, true if data is a last buffer. |
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Created "nginx objects" section in reference.xml.
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changeset
|
452 </tag-desc> |
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Created "nginx objects" section in reference.xml.
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453 |
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454 </list> |
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|
455 </para> |
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|
456 </tag-desc> |
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|
457 |
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Added IDs to methods in njs Reference.
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|
458 <tag-name id="s_remote_address"><literal>s.remoteAddress</literal></tag-name> |
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459 <tag-desc> |
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|
460 client address, read-only |
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Created "nginx objects" section in reference.xml.
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|
461 </tag-desc> |
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|
462 |
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Created "nginx objects" section in reference.xml.
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|
463 <tag-name id="s_send"><literal>s.send(<value>data</value>[, |
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Created "nginx objects" section in reference.xml.
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|
464 <value>options</value>])</literal></tag-name> |
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|
465 <tag-desc> |
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|
466 sends the data to the client |
2337
867fe207f13e
Updated links to changes.xml in njs Reference.
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467 (<link doc="changes.xml" id="njs0.2.4">0.2.4</link>). |
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468 The <literal>options</literal> is an object used |
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469 to override nginx buffer flags derived from an incoming data chunk buffer. |
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470 The flags can be overriden with the following flags: |
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471 <para> |
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472 <list type="tag"> |
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473 |
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|
474 <tag-name><literal>last</literal></tag-name> |
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475 <tag-desc> |
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476 boolean, true if the buffer is the last buffer |
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|
477 </tag-desc> |
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478 |
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Created "nginx objects" section in reference.xml.
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479 <tag-name><literal>flush</literal></tag-name> |
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|
480 <tag-desc> |
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481 boolean, true if the buffer should have the <literal>flush</literal> flag |
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482 </tag-desc> |
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483 </list> |
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484 </para> |
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Created "nginx objects" section in reference.xml.
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|
485 The method can be called multiple times per callback invocation. |
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Created "nginx objects" section in reference.xml.
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|
486 </tag-desc> |
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Created "nginx objects" section in reference.xml.
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|
487 |
2338
39ac205f90b7
Documented that r.variables{} and s.variables{} are writable.
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|
488 <tag-name id="s_variables"><literal>s.variables{}</literal></tag-name> |
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|
489 <tag-desc> |
2338
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Documented that r.variables{} and s.variables{} are writable.
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|
490 nginx variables object, writable |
39ac205f90b7
Documented that r.variables{} and s.variables{} are writable.
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|
491 (since <link doc="changes.xml" id="njs0.2.8">0.2.8</link>) |
2247
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|
492 </tag-desc> |
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Created "nginx objects" section in reference.xml.
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|
493 |
2570
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Added IDs to methods in njs Reference.
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|
494 <tag-name id="s_warn"><literal>s.warn(<value>string</value>)</literal></tag-name> |
2247
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Created "nginx objects" section in reference.xml.
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|
495 <tag-desc> |
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Created "nginx objects" section in reference.xml.
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changeset
|
496 writes a sent <literal>string</literal> to the error log |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
497 on the <literal>warning</literal> level of logging |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
498 </tag-desc> |
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Created "nginx objects" section in reference.xml.
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|
499 |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
500 </list> |
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Created "nginx objects" section in reference.xml.
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|
501 </para> |
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Created "nginx objects" section in reference.xml.
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|
502 |
0f16ef9a8dbe
Created "nginx objects" section in reference.xml.
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|
503 </section> |
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Created "nginx objects" section in reference.xml.
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|
504 |
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Created "nginx objects" section in reference.xml.
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|
505 </section> |
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Created "nginx objects" section in reference.xml.
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|
506 |
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Created "nginx objects" section in reference.xml.
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|
507 |
2176 | 508 <section id="core" name="Core"> |
509 | |
510 | |
2405
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Documented the "process" global object.
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|
511 <section id="core_global" name="Global"> |
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|
512 |
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Documented the "process" global object.
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|
513 |
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|
514 <section id="process" name="Process"> |
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Documented the "process" global object.
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|
515 |
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Documented the "process" global object.
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|
516 <para> |
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Documented the "process" global object.
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|
517 The <literal>process</literal> object is a global object |
dbf68c949522
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|
518 that provides information about the current process |
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Documented the "process" global object.
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diff
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|
519 (<link doc="changes.xml" id="njs0.3.3">0.3.3</link>). |
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Documented the "process" global object.
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|
520 </para> |
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Documented the "process" global object.
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|
521 |
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Documented the "process" global object.
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|
522 |
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Documented the "process" global object.
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|
523 <para> |
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|
524 <list type="tag"> |
dbf68c949522
Documented the "process" global object.
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|
525 |
dbf68c949522
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|
526 <tag-name id="process_argv"><literal>process.argv</literal></tag-name> |
dbf68c949522
Documented the "process" global object.
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|
527 <tag-desc> |
dbf68c949522
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diff
changeset
|
528 Returns an array that contains the command line arguments |
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Documented the "process" global object.
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parents:
2394
diff
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|
529 passed when the current process was launched. |
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Documented the "process" global object.
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|
530 </tag-desc> |
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Documented the "process" global object.
Yaroslav Zhuravlev <yar@nginx.com>
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|
531 |
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|
532 <tag-name id="process_env"><literal>process.env</literal></tag-name> |
dbf68c949522
Documented the "process" global object.
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diff
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|
533 <tag-desc> |
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parents:
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diff
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|
534 Returns an object containing the user environment. |
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Documented the "process" global object.
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diff
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|
535 <note> |
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|
536 By default, nginx removes all environment variables inherited |
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Documented the "process" global object.
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|
537 from its parent process except the TZ variable. |
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Documented the "process" global object.
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|
538 Use the <link doc="../ngx_core_module.xml" id="env"/> directive |
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diff
changeset
|
539 to preserve some of the inherited variables. |
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diff
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|
540 </note> |
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parents:
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|
541 </tag-desc> |
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|
542 |
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parents:
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diff
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|
543 <tag-name id="process_pid"><literal>process.pid</literal></tag-name> |
dbf68c949522
Documented the "process" global object.
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|
544 <tag-desc> |
dbf68c949522
Documented the "process" global object.
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diff
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|
545 Returns the PID of the current process. |
dbf68c949522
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diff
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|
546 </tag-desc> |
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parents:
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diff
changeset
|
547 |
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parents:
2394
diff
changeset
|
548 <tag-name id="process_ppid"><literal>process.ppid</literal></tag-name> |
dbf68c949522
Documented the "process" global object.
Yaroslav Zhuravlev <yar@nginx.com>
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|
549 <tag-desc> |
dbf68c949522
Documented the "process" global object.
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|
550 Returns the PID of the current parent process. |
dbf68c949522
Documented the "process" global object.
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diff
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|
551 </tag-desc> |
dbf68c949522
Documented the "process" global object.
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parents:
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diff
changeset
|
552 |
dbf68c949522
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parents:
2394
diff
changeset
|
553 </list> |
dbf68c949522
Documented the "process" global object.
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diff
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|
554 </para> |
dbf68c949522
Documented the "process" global object.
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parents:
2394
diff
changeset
|
555 |
dbf68c949522
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parents:
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diff
changeset
|
556 </section> |
dbf68c949522
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parents:
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diff
changeset
|
557 |
dbf68c949522
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parents:
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diff
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|
558 </section> |
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parents:
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diff
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|
559 |
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parents:
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diff
changeset
|
560 |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
561 <section id="string" name="String"> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
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|
562 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
563 <para> |
2315
ae56e4613280
Corrected language in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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diff
changeset
|
564 There are two types of strings in njs: a Unicode string (default) and |
ae56e4613280
Corrected language in njs.
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parents:
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diff
changeset
|
565 a byte string. |
2186
8e2b3aadc3ce
Added njs String object.
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diff
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|
566 </para> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
567 |
8e2b3aadc3ce
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parents:
2183
diff
changeset
|
568 <para> |
2315
ae56e4613280
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parents:
2313
diff
changeset
|
569 A Unicode string corresponds to an ECMAScript string |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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570 which contains Unicode characters. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
571 </para> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
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|
572 |
8e2b3aadc3ce
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573 <para> |
2315
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parents:
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|
574 Byte strings contain a sequence of bytes |
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parents:
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|
575 and are used to serialize Unicode strings |
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576 to external data and deserialize from external sources. |
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577 For example, the <link id="string_toutf8">toUTF8()</link> method serializes |
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|
578 a Unicode string to a byte string using UTF8 encoding: |
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|
579 <example> |
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|
580 >> '£'.toUTF8().toString('hex') |
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Added quotes to njs examples.
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parents:
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diff
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|
581 'c2a3' /* C2 A3 is the UTF8 representation of 00A3 ('£') code point */ |
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|
582 </example> |
8e2b3aadc3ce
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parents:
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diff
changeset
|
583 The <link id="string_tobytes">toBytes()</link> method serializes |
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584 a Unicode string with code points up to 255 into a byte string, |
8e2b3aadc3ce
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parents:
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585 otherwise, <literal>null</literal> is returned: |
8e2b3aadc3ce
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parents:
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diff
changeset
|
586 <example> |
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parents:
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diff
changeset
|
587 >> '£'.toBytes().toString('hex') |
2214
e029f4bc7ede
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parents:
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diff
changeset
|
588 'a3' /* a3 is a byte equal to 00A3 ('£') code point */ |
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|
589 </example> |
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parents:
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diff
changeset
|
590 Only byte strings can be converted to different encodings. |
8e2b3aadc3ce
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parents:
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diff
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|
591 For example, a string cannot be encoded to <literal>hex</literal> directly: |
8e2b3aadc3ce
Added njs String object.
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parents:
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|
592 <example> |
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parents:
2183
diff
changeset
|
593 >> 'αβγδ'.toString('base64') |
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parents:
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diff
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|
594 TypeError: argument must be a byte string |
8e2b3aadc3ce
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|
595 at String.prototype.toString (native) |
8e2b3aadc3ce
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|
596 at main (native) |
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diff
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|
597 </example> |
8e2b3aadc3ce
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|
598 To convert a Unicode string to hex, |
8e2b3aadc3ce
Added njs String object.
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parents:
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changeset
|
599 first, it should be converted to a byte string and then to hex: |
8e2b3aadc3ce
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|
600 <example> |
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parents:
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diff
changeset
|
601 >> 'αβγδ'.toUTF8().toString('base64') |
2214
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diff
changeset
|
602 'zrHOss6zzrQ=' |
2186
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diff
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|
603 </example> |
8e2b3aadc3ce
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parents:
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changeset
|
604 |
8e2b3aadc3ce
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changeset
|
605 <list type="tag"> |
8e2b3aadc3ce
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parents:
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diff
changeset
|
606 |
2211
660229c5c92f
Documented String.bytesFrom() method in njs.
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parents:
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diff
changeset
|
607 <tag-name id="string_bytesfrom"><literal>String.bytesFrom(<value>array</value> |
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Documented String.bytesFrom() method in njs.
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parents:
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|
608 | <value>string</value>, <value>encoding</value>)</literal></tag-name> |
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parents:
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|
609 <tag-desc> |
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diff
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|
610 Creates a byte string either from an array that contains octets, |
2315
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|
611 or from an encoded string |
2337
867fe207f13e
Updated links to changes.xml in njs Reference.
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diff
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|
612 (<link doc="changes.xml" id="njs0.2.3">0.2.3</link>). |
2211
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|
613 The encoding can be |
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parents:
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|
614 <literal>hex</literal>, |
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|
615 <literal>base64</literal>, and |
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|
616 <literal>base64url</literal>. |
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|
617 <example> |
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|
618 >> String.bytesFrom([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]) |
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|
619 'buffer' |
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Documented String.bytesFrom() method in njs.
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parents:
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|
620 |
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parents:
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|
621 >> String.bytesFrom('YnVmZmVy', 'base64') |
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parents:
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622 'buffer' |
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|
623 </example> |
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624 </tag-desc> |
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|
625 |
2267
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diff
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|
626 <tag-name id="string_frombytes"><literal>String.prototype.fromBytes(<value>start</value>[, |
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627 <value>end</value>])</literal></tag-name> |
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|
628 <tag-desc> |
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|
629 Returns a new Unicode string from a byte string |
2186
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630 where each byte is replaced with a corresponding Unicode code point. |
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631 </tag-desc> |
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|
632 |
2267
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|
633 <tag-name id="string_fromutf8"><literal>String.prototype.fromUTF8(<value>start</value>[, |
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634 <value>end</value>])</literal></tag-name> |
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|
635 <tag-desc> |
2569
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|
636 Converts a byte string containing a valid UTF8 string |
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637 into a Unicode string, |
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638 otherwise <literal>null</literal> is returned. |
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|
639 </tag-desc> |
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changeset
|
640 |
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changeset
|
641 <tag-name id="string_tobytes"><literal>String.prototype.toBytes(start[, |
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|
642 end])</literal></tag-name> |
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643 <tag-desc> |
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|
644 Serializes a Unicode string to a byte string. |
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645 Returns <literal>null</literal> if a character larger than 255 is |
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|
646 found in the string. |
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|
647 </tag-desc> |
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|
648 |
2570
44792f1ee284
Added IDs to methods in njs Reference.
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parents:
2569
diff
changeset
|
649 <tag-name id="string_tostring"><literal>String.prototype.toString([<value>encoding</value>])</literal></tag-name> |
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|
650 <tag-desc> |
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|
651 <para> |
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|
652 If no <literal>encoding</literal> is specified, |
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|
653 returns a specified Unicode string or byte string as in ECMAScript. |
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|
654 </para> |
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|
655 |
8e2b3aadc3ce
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|
656 <para> |
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|
657 If <literal>encoding</literal> is specified, |
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658 encodes a <link id="string_tobytes">byte string</link> to |
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|
659 <literal>hex</literal>, |
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|
660 <literal>base64</literal>, or |
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|
661 <literal>base64url</literal>. |
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|
662 </para> |
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|
663 <example> |
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|
664 >> 'αβγδ'.toUTF8().toString('base64url') |
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|
665 'zrHOss6zzrQ' |
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|
666 </example> |
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|
667 </tag-desc> |
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|
668 |
8e2b3aadc3ce
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|
669 <tag-name id="string_toutf8"><literal>String.prototype.toUTF8(<value>start</value>[, |
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670 <value>end</value>])</literal></tag-name> |
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671 <tag-desc> |
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|
672 Serializes a Unicode string |
2186
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|
673 to a byte string using UTF8 encoding. |
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|
674 <example> |
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|
675 >> 'αβγδ'.toUTF8().length |
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676 8 |
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677 >> 'αβγδ'.length |
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|
678 4 |
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|
679 </example> |
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|
680 </tag-desc> |
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|
681 |
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|
682 </list> |
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|
683 </para> |
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|
684 |
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diff
changeset
|
685 </section> |
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|
686 |
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|
687 |
2177 | 688 <section id="crypto" name="Crypto"> |
689 | |
690 <para> | |
691 The Crypto module provides cryptographic functionality support. | |
692 The Crypto module object is returned by <literal>require('crypto')</literal>. | |
693 </para> | |
694 | |
695 <para> | |
696 <list type="tag"> | |
697 | |
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698 <tag-name id="crypto_createhash"><literal>crypto.createHash(<value>algorithm</value>)</literal></tag-name> |
2177 | 699 <tag-desc> |
700 Creates and returns a <link id="crypto_hash">Hash</link> object | |
701 that can be used to generate hash digests | |
702 using the given <value>algorithm</value>. | |
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703 The algorithm can be |
2177 | 704 <literal>md5</literal>, |
705 <literal>sha1</literal>, and | |
706 <literal>sha256</literal>. | |
707 </tag-desc> | |
708 | |
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709 <tag-name id="crypto_createhmac"><literal>crypto.createHmac(<value>algorithm</value>, |
2177 | 710 <value>secret key</value>)</literal></tag-name> |
711 <tag-desc> | |
712 Creates and returns an <link id="crypto_hmac">HMAC</link> object | |
713 that uses the given <value>algorithm</value> and <value>secret key</value>. | |
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714 The algorithm can be |
2177 | 715 <literal>md5</literal>, |
716 <literal>sha1</literal>, and | |
717 <literal>sha256</literal>. | |
718 </tag-desc> | |
719 | |
720 </list> | |
721 </para> | |
722 | |
723 | |
724 <section id="crypto_hash" name="Hash"> | |
725 | |
726 <para> | |
727 <list type="tag"> | |
728 | |
729 <tag-name><literal>hash.update(<value>data</value>)</literal></tag-name> | |
730 <tag-desc> | |
731 Updates the hash content with the given <value>data</value>. | |
732 </tag-desc> | |
733 | |
734 <tag-name><literal>hash.digest([<value>encoding</value>])</literal></tag-name> | |
735 <tag-desc> | |
736 Calculates the digest of all of the data passed using | |
737 <literal>hash.update()</literal>. | |
738 The encoding can be | |
739 <literal>hex</literal>, | |
740 <literal>base64</literal>, and | |
741 <literal>base64url</literal>. | |
742 If encoding is not provided, a byte string is returned. | |
743 </tag-desc> | |
744 | |
745 </list> | |
746 </para> | |
747 | |
748 <para> | |
749 <example> | |
750 >> var cr = require('crypto') | |
751 undefined | |
752 | |
753 >> cr.createHash('sha1').update('A').update('B').digest('base64url') | |
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754 'BtlFlCqiamG-GMPiK_GbvKjdK10' |
2177 | 755 </example> |
756 </para> | |
757 | |
758 </section> | |
759 | |
760 | |
761 <section id="crypto_hmac" name="HMAC"> | |
762 | |
763 <para> | |
764 <list type="tag"> | |
765 | |
766 <tag-name><literal>hmac.update(<value>data</value>)</literal></tag-name> | |
767 <tag-desc> | |
768 Updates the HMAC content with the given <value>data</value>. | |
769 </tag-desc> | |
770 | |
771 <tag-name><literal>hmac.digest([<value>encoding</value>])</literal></tag-name> | |
772 <tag-desc> | |
773 Calculates the HMAC digest of all of the data passed using | |
774 <literal>hmac.update()</literal>. | |
775 The encoding can be | |
776 <literal>hex</literal>, | |
777 <literal>base64</literal>, and | |
778 <literal>base64url</literal>. | |
779 If encoding is not provided, a byte string is returned. | |
780 </tag-desc> | |
781 </list> | |
782 </para> | |
783 | |
784 <para> | |
785 <example> | |
786 >> var cr = require('crypto') | |
787 undefined | |
788 | |
789 >> cr.createHmac('sha1', 'secret.key').update('AB').digest('base64url') | |
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790 'Oglm93xn23_MkiaEq_e9u8zk374' |
2177 | 791 </example> |
792 </para> | |
793 | |
794 </section> | |
795 | |
796 </section> | |
797 | |
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798 <section id="njs_api_timers" name="Timers"> |
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799 |
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800 <para> |
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801 |
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802 <list type="tag"> |
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803 |
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804 <tag-name id="cleartimeout"><literal>clearTimeout(<value>timeout</value>)</literal></tag-name> |
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805 <tag-desc> |
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806 Cancels a <literal>timeout</literal> object |
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807 created by <link id="settimeout">setTimeout()</link>. |
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808 </tag-desc> |
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809 |
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810 <tag-name id="settimeout"><literal>setTimeout(<value>function</value>, |
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811 <value>ms</value>[, <value>arg1</value>, <value>argN</value>])</literal></tag-name> |
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812 <tag-desc> |
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813 Calls a <literal>function</literal> |
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814 after a specified number of <literal>milliseconds</literal>. |
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815 One or more optional <literal>arguments</literal> |
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816 can be passed to the specified function. |
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817 Returns a <literal>timeout</literal> object. |
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818 <example> |
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819 function handler(v) |
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820 { |
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821 // ... |
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822 } |
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823 |
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824 t = setTimeout(handler, 12); |
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825 |
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826 // ... |
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827 |
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828 clearTimeout(t); |
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829 </example> |
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830 </tag-desc> |
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831 |
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832 </list> |
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833 </para> |
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834 |
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835 </section> |
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836 |
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837 |
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838 <section id="njs_api_fs" name="File System"> |
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839 |
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840 <para> |
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841 The File System module provides operations with files. |
2507 | 842 </para> |
843 | |
844 <para> | |
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845 The module object is returned by <literal>require('fs')</literal>. |
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846 Since <link doc="changes.xml" id="njs0.3.9">0.3.9</link>, |
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847 promissified versions of file system methods are available through |
2507 | 848 <literal>require('fs').promises</literal> object: |
849 <example> | |
850 > var fs = require('fs').promises; | |
851 undefined | |
852 > fs.readFile("/file/path").then((data)=>console.log(data)) | |
853 <file data> | |
854 </example> | |
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855 <list type="tag"> |
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856 |
2507 | 857 <tag-name id="fs_accesssync"><literal>accessSync(<value>path</value>[, |
858 <value>mode</value>])</literal></tag-name> | |
859 <tag-desc> | |
860 Synchronously tests permissions for a file or directory | |
861 specified in the <literal>path</literal> | |
862 (<link doc="changes.xml" id="njs0.3.9">0.3.9</link>). | |
863 If the check fails, an error will be returned, | |
864 otherwise, the method will return undefined. | |
865 <list type="tag"> | |
866 | |
867 <tag-name><literal>mode</literal></tag-name> | |
868 <tag-desc> | |
869 by default is <link id="access_const"><literal>fs.constants.F_OK</literal></link>. | |
870 The mode argument is an optional integer | |
871 that specifies the accessibility checks to be performed. | |
872 <example> | |
873 try { | |
874 fs.accessSync('/file/path', fs.constants.R_OK | fs.constants.W_OK); | |
875 console.log('has access'); | |
876 } catch (e) { | |
877 console.log('no access');) | |
878 } | |
879 </example> | |
880 </tag-desc> | |
881 | |
882 </list> | |
883 </tag-desc> | |
884 | |
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885 <tag-name id="fs_appendfilesync"><literal>appendFileSync(<value>filename</value>, |
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886 <value>data</value>[, <value>options</value>])</literal></tag-name> |
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887 <tag-desc> |
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888 Synchronously appends specified <literal>data</literal> |
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889 to a file with provided <literal>filename</literal>. |
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890 If the file does not exist, it will be created. |
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891 The <literal>options</literal> parameter is expected to be |
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892 an object with the following keys: |
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893 <list type="tag"> |
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894 |
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895 <tag-name><literal>mode</literal></tag-name> |
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896 <tag-desc> |
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897 mode option, by default is <literal>0o666</literal> |
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898 </tag-desc> |
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899 |
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900 <tag-name><literal>flag</literal></tag-name> |
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901 <tag-desc> |
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902 file system <link id="njs_api_fs_flags">flag</link>, |
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903 by default is <literal>a</literal> |
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904 </tag-desc> |
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905 |
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906 </list> |
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907 </tag-desc> |
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908 |
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909 <tag-name id="fs_mkdirsync"><literal>mkdirSync(<value>path</value>[, |
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910 <value>options</value>])</literal></tag-name> |
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911 <tag-desc> |
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912 Synchronously creates a directory at the specified <literal>path</literal> |
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913 (<link doc="changes.xml" id="njs0.4.2">0.4.2</link>). |
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914 The <literal>options</literal> parameter is expected to be an |
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915 <literal>integer</literal> that specifies |
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916 the <link id="fs_mkdirsync_mode">mode</link>, |
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917 or an object with the following keys: |
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918 <list type="tag"> |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
919 |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
920 <tag-name id="fs_mkdirsync_mode"><literal>mode</literal></tag-name> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
921 <tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
922 mode option, by default is <literal>0o777</literal>. |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
923 </tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
924 |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
925 </list> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
926 </tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
927 |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
928 <tag-name id="fs_readdirsync"><literal>readdirSync(<value>path</value>[, |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
929 <value>options</value>])</literal></tag-name> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
930 <tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
931 Synchronously reads the contents of a directory |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
932 at the specified <literal>path</literal> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
933 (<link doc="changes.xml" id="njs0.4.2">0.4.2</link>). |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
934 The <literal>options</literal> parameter is expected to be |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
935 a string that specifies <link id="fs_readdirsync_encoding">encoding</link> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
936 or an object with the following keys: |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
937 <list type="tag"> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
938 |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
939 <tag-name id="fs_readdirsync_encoding"><literal>encoding</literal></tag-name> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
940 <tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
941 encoding, by default is not specified. |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
942 The encoding can be <literal>utf8</literal>. |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
943 </tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
944 |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
945 <tag-name id="fs_readdirsync_withfiletypes"><literal>withFileTypes</literal></tag-name> |
428a8cf1911b
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
946 <tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
947 if set to <literal>true</literal>, the files array will contain |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
948 <link id="fs_dirent"><literal>fs.Dirent</literal></link> objects, |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
949 by default is <literal>false</literal>. |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
950 </tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
951 |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
952 </list> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
953 </tag-desc> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2546
diff
changeset
|
954 |
2570
44792f1ee284
Added IDs to methods in njs Reference.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2569
diff
changeset
|
955 <tag-name id="fs_readfilesync"><literal>readFileSync(<value>filename</value>[, |
2204
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
956 <value>options</value>])</literal></tag-name> |
001f2d905fd9
Documented fileSystem methods in njs.
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parents:
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diff
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|
957 <tag-desc> |
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parents:
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diff
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|
958 Synchronously returns the contents of the file |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
959 with provided <literal>filename</literal>. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
960 The <literal>options</literal> parameter holds |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
961 <literal>string</literal> that specifies encoding. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
962 If not specified, a <link id="string_tobytes">byte string</link> is returned. |
001f2d905fd9
Documented fileSystem methods in njs.
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parents:
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diff
changeset
|
963 If <literal>utf8</literal> encoding is specified, a Unicode string is returned. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
964 Otherwise, <literal>options</literal> is expected to be |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
965 an object with the following keys: |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
966 <list type="tag"> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
967 |
001f2d905fd9
Documented fileSystem methods in njs.
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parents:
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diff
changeset
|
968 <tag-name><literal>encoding</literal></tag-name> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
969 <tag-desc> |
001f2d905fd9
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parents:
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diff
changeset
|
970 encoding, by default is not specified. |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
971 The encoding can be <literal>utf8</literal> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
972 </tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
973 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
974 <tag-name><literal>flag</literal></tag-name> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
975 <tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
976 file system <link id="njs_api_fs_flags">flag</link>, |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
977 by default is <literal>r</literal> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
978 </tag-desc> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
979 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
980 </list> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
981 <example> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
982 >> var fs = require('fs') |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
983 undefined |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2203
diff
changeset
|
984 >> var file = fs.readFileSync('/file/path.tar.gz') |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
985 undefined |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
986 >> var gzipped = /^\x1f\x8b/.test(file); gzipped |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
987 true |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
988 </example> |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
989 </tag-desc> |
001f2d905fd9
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parents:
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diff
changeset
|
990 |
2507 | 991 <tag-name id="fs_realpathsync"><literal>realpathSync(<value>path</value>[, |
992 <value>options</value>])</literal></tag-name> | |
993 <tag-desc> | |
994 Synchronously computes the canonical pathname by resolving | |
995 <literal>.</literal>, <literal>..</literal> and symbolic links using | |
2508
d3d5b67a1462
Language fixes in njs file system methods.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2507
diff
changeset
|
996 <link url="http://man7.org/linux/man-pages/man3/realpath.3.html">realpath(3)</link>. |
2507 | 997 The <literal>options</literal> argument can be a string specifying an encoding, |
998 or an object with an encoding property specifying the character encoding | |
999 to use for the path passed to the callback | |
1000 (<link doc="changes.xml" id="njs0.3.9">0.3.9</link>). | |
1001 </tag-desc> | |
1002 | |
2509
827a6d7fe108
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parents:
2508
diff
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|
1003 <tag-name id="fs_renamesync"><literal>renameSync(<value>oldPath</value>, |
827a6d7fe108
Reordered alphabetically njs file system methods.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2508
diff
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|
1004 <value>newPath</value>)</literal></tag-name> |
827a6d7fe108
Reordered alphabetically njs file system methods.
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parents:
2508
diff
changeset
|
1005 <tag-desc> |
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Reordered alphabetically njs file system methods.
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parents:
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diff
changeset
|
1006 Synchronously changes the name or location of a file from |
827a6d7fe108
Reordered alphabetically njs file system methods.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2508
diff
changeset
|
1007 <literal>oldPath</literal> to <literal>newPath</literal> |
827a6d7fe108
Reordered alphabetically njs file system methods.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2508
diff
changeset
|
1008 (<link doc="changes.xml" id="njs0.3.4">0.3.4</link>). |
827a6d7fe108
Reordered alphabetically njs file system methods.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
1009 <example> |
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|
1010 >> var fs = require('fs') |
827a6d7fe108
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|
1011 undefined |
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parents:
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|
1012 >> var file = fs.renameSync('hello.txt', 'HelloWorld.txt') |
827a6d7fe108
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diff
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|
1013 undefined |
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Reordered alphabetically njs file system methods.
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parents:
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|
1014 </example> |
827a6d7fe108
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|
1015 </tag-desc> |
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Reordered alphabetically njs file system methods.
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parents:
2508
diff
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|
1016 |
2563
428a8cf1911b
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changeset
|
1017 <tag-name id="fs_rmdirsync"><literal>rmdirSync(<value>path</value>)</literal></tag-name> |
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changeset
|
1018 <tag-desc> |
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parents:
2546
diff
changeset
|
1019 Synchronously removes a directory at the specified <literal>path</literal> |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
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|
1020 (<link doc="changes.xml" id="njs0.4.2">0.4.2</link>). |
428a8cf1911b
Documented mkdirSync, readdirSync, rmdirSync, fs.Dirent in njs.
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|
1021 </tag-desc> |
428a8cf1911b
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|
1022 |
2509
827a6d7fe108
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|
1023 <tag-name id="fs_symlinksync"><literal>symlinkSync(<value>target</value>, |
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|
1024 <value>path</value>)</literal></tag-name> |
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|
1025 <tag-desc> |
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Reordered alphabetically njs file system methods.
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|
1026 Synchronously creates the link called <literal>path</literal> |
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|
1027 pointing to <literal>target</literal> using |
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|
1028 <link url="http://man7.org/linux/man-pages/man2/symlink.2.html">symlink(2)</link> |
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|
1029 (<link doc="changes.xml" id="njs0.3.9">0.3.9</link>). |
827a6d7fe108
Reordered alphabetically njs file system methods.
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|
1030 Relative targets are relative to the link’s parent directory. |
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|
1031 </tag-desc> |
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|
1032 |
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1033 <tag-name id="fs_unlinksync"><literal>unlinkSync(<value>path</value>)</literal></tag-name> |
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|
1034 <tag-desc> |
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Reordered alphabetically njs file system methods.
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|
1035 Synchronously unlinks a file by <literal>path</literal> |
827a6d7fe108
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|
1036 (<link doc="changes.xml" id="njs0.3.9">0.3.9</link>). |
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|
1037 </tag-desc> |
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Reordered alphabetically njs file system methods.
Yaroslav Zhuravlev <yar@nginx.com>
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diff
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|
1038 |
2570
44792f1ee284
Added IDs to methods in njs Reference.
Yaroslav Zhuravlev <yar@nginx.com>
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|
1039 <tag-name id="fs_writefilesync"><literal>writeFileSync(<value>filename</value>, |
2204
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1040 <value>data</value>[, |
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|
1041 <value>options</value>])</literal></tag-name> |
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1042 <tag-desc> |
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1043 Synchronously writes <literal>data</literal> to a file |
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|
1044 with provided <literal>filename</literal>. |
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|
1045 If the file does not exist, it will be created, |
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|
1046 if the file exists, it will be replaced. |
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1047 The <literal>options</literal> parameter is expected to be |
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1048 an object with the following keys: |
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|
1049 <list type="tag"> |
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1050 <tag-name><literal>mode</literal></tag-name> |
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1051 <tag-desc> |
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1052 mode option, by default is <literal>0o666</literal> |
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1053 </tag-desc> |
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|
1054 |
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|
1055 <tag-name><literal>flag</literal></tag-name> |
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|
1056 <tag-desc> |
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1057 file system <link id="njs_api_fs_flags">flag</link>, |
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|
1058 by default is <literal>w</literal> |
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|
1059 </tag-desc> |
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1060 |
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1061 </list> |
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1062 <example> |
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1063 >> var fs = require('fs') |
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|
1064 undefined |
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|
1065 >> var file = fs.writeFileSync('hello.txt', 'Hello world') |
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|
1066 undefined |
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|
1067 </example> |
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1068 </tag-desc> |
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|
1069 |
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1070 </list> |
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1071 </para> |
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|
1072 |
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|
1073 |
2563
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|
1074 <section id="fs_dirent" name="fs.Dirent"> |
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|
1075 |
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|
1076 <para> |
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|
1077 <literal>fs.Dirent</literal> is a representation of a directory entry— |
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|
1078 a file or a subdirectory. |
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|
1079 When |
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|
1080 <link id="fs_readdirsync"><literal>readdirSync()</literal></link> |
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|
1081 is called with the |
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|
1082 <link id="fs_readdirsync_withfiletypes"><literal>withFileTypes</literal></link> |
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|
1083 option, |
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|
1084 the resulting array contains <literal>fs.Dirent</literal> objects. |
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|
1085 |
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|
1086 <list type= "bullet" compact="no"> |
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|
1087 |
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|
1088 <listitem> |
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|
1089 <literal>dirent.isBlockDevice()</literal>—returns |
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|
1090 <literal>true</literal> if the <literal>fs.Dirent</literal> object describes |
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|
1091 a block device. |
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|
1092 </listitem> |
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|
1093 |
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|
1094 <listitem> |
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|
1095 <literal>dirent.isCharacterDevice()</literal>—returns |
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|
1096 <literal>true</literal> if the <literal>fs.Dirent</literal> object describes |
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|
1097 a character device. |
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|
1098 </listitem> |
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|
1099 |
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|
1100 <listitem> |
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1101 <literal>dirent.isDirectory()</literal>—returns |
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|
1102 <literal>true</literal> if the <literal>fs.Dirent</literal> object describes |
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|
1103 a file system directory. |
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|
1104 </listitem> |
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|
1105 |
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|
1106 <listitem> |
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|
1107 <literal>dirent.isFIFO()</literal>—returns |
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|
1108 <literal>true</literal> if the <literal>fs.Dirent</literal> object describes |
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|
1109 a first-in-first-out (FIFO) pipe. |
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|
1110 </listitem> |
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|
1111 |
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|
1112 <listitem> |
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1113 <literal>dirent.isFile()</literal>—returns |
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1114 <literal>true</literal> if the <literal>fs.Dirent</literal> object describes |
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|
1115 a regular file. |
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1116 </listitem> |
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1117 |
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|
1118 <listitem> |
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1119 <literal>dirent.isSocket()</literal>—returns |
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1120 <literal>true</literal> if the <literal>fs.Dirent</literal> object describes |
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|
1121 a socket. |
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1122 </listitem> |
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1123 |
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1124 <listitem> |
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|
1125 <literal>dirent.isSymbolicLink()</literal>—returns |
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1126 <literal>true</literal> if the <literal>fs.Dirent</literal> object describes |
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1127 a symbolic link. |
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1128 </listitem> |
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|
1129 |
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|
1130 <listitem> |
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1131 <literal>dirent.name</literal>— |
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|
1132 the name of the file <literal>fs.Dirent</literal> object refers to. |
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|
1133 </listitem> |
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|
1134 |
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|
1135 </list> |
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|
1136 </para> |
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|
1137 |
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1138 </section> |
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1139 |
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1140 |
2507 | 1141 <section id="access_const" name="File Access Constants"> |
1142 | |
1143 <para> | |
1144 The <link id="fs_accesssync"><literal>access()</literal></link> method | |
1145 can accept the following flags. | |
1146 These flags are exported by <literal>fs.constants</literal>: | |
1147 | |
1148 <list type= "bullet" compact="no"> | |
1149 | |
1150 <listitem> | |
1151 <literal>F_OK</literal>—indicates that the file | |
1152 is visible to the calling process, | |
1153 used by default if no mode is specified | |
1154 </listitem> | |
1155 | |
1156 <listitem> | |
1157 <literal>R_OK</literal>—indicates that the file can be | |
1158 read by the calling process | |
1159 </listitem> | |
1160 | |
1161 <listitem> | |
1162 <literal>W_OK</literal>—indicates that the file can be | |
1163 written by the calling process | |
1164 </listitem> | |
1165 | |
1166 <listitem> | |
1167 <literal>X_OK</literal>—indicates that the file can be | |
1168 executed by the calling process | |
1169 </listitem> | |
1170 | |
1171 </list> | |
1172 </para> | |
1173 | |
1174 </section> | |
1175 | |
1176 | |
2204
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1177 <section id="njs_api_fs_flags" name="File System Flags"> |
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1178 |
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1179 <para> |
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1180 The <literal>flag</literal> option can accept the following values: |
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1181 |
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1182 <list type= "bullet" compact="no"> |
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1183 |
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1184 <listitem> |
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1185 <literal>a</literal>—open a file for appending. |
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1186 The file is created if it does not exist |
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1187 </listitem> |
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1188 |
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1189 <listitem> |
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1190 <literal>ax</literal>—the same as <literal>a</literal> |
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1191 but fails if the file already exists |
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1192 </listitem> |
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1193 |
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1194 <listitem> |
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1195 <literal>a+</literal>—open a file for reading and appending. |
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1196 If the file does not exist, it will be created |
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1197 </listitem> |
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1198 |
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1199 <listitem> |
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1200 <literal>ax+</literal>—the same as <literal>a+</literal> |
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1201 but fails if the file already exists |
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1202 </listitem> |
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1203 |
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1204 <listitem> |
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1205 <literal>as</literal>—open a file for appending in synchronous mode. |
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1206 If the file does not exist, it will be created |
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1207 </listitem> |
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1208 |
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1209 <listitem> |
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1210 <literal>as+</literal>—open a file for reading and appending |
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1211 in synchronous mode. |
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1212 If the file does not exist, it will be created |
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1213 </listitem> |
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1214 |
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1215 <listitem> |
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1216 <literal>r</literal>—open a file for reading. |
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1217 An exception occurs if the file does not exist |
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1218 </listitem> |
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1219 |
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1220 <listitem> |
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1221 <literal>r+</literal>—open a file for reading and writing. |
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1222 An exception occurs if the file does not exist |
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1223 </listitem> |
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1224 |
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1225 <listitem> |
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1226 <literal>rs+</literal>—open a file for reading and writing |
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1227 in synchronous mode. |
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1228 Instructs the operating system to bypass the local file system cache |
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1229 </listitem> |
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1230 |
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1231 <listitem> |
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1232 <literal>w</literal>—open a file for writing. |
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1233 If the file does not exist, it will be created. |
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1234 If the file exists, it will be replaced |
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1235 </listitem> |
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1236 |
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1237 <listitem> |
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1238 <literal>wx</literal>—the same as <literal>w</literal> |
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1239 but fails if the file already exists |
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1240 </listitem> |
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1241 |
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1242 <listitem> |
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1243 <literal>w+</literal>—open a file for reading and writing. |
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1244 If the file does not exist, it will be created. |
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1245 If the file exists, it will be replaced |
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1246 </listitem> |
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1247 |
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1248 <listitem> |
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1249 <literal>wx+</literal>—the same as <literal>w+</literal> |
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1250 but fails if the file already exists |
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1251 </listitem> |
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1252 |
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1253 </list> |
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1254 </para> |
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1255 |
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1256 </section> |
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1257 |
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1258 </section> |
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1259 |
2176 | 1260 </section> |
1261 | |
2175
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1262 </article> |