Mercurial > hg > nginx-site
annotate xml/en/docs/njs/reference.xml @ 2253:a89093ff86a3
Clarified ISO 8601 time, changed example, bumped version in API.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Tue, 09 Oct 2018 12:28:06 +0300 |
parents | 0f16ef9a8dbe |
children | 9644ecb67081 |
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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="10"> |
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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 </section> |
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22 |
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23 |
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24 <section id="http_stream" name="nginx objects"> |
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25 |
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26 |
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27 <section id="http" name="HTTP Request"> |
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28 |
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29 <para> |
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30 The HTTP request object is available only in the |
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31 <link doc="../http/ngx_http_js_module.xml">ngx_http_js_module</link> module. |
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32 All string properties of the object are <link id="string">byte strings</link>. |
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33 |
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34 <list type="tag"> |
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35 |
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36 <tag-name><literal>r.args{}</literal></tag-name> |
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37 <tag-desc> |
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38 request arguments object, read-only |
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39 </tag-desc> |
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40 |
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41 <tag-name><literal>r.error(<value>string</value>)</literal></tag-name> |
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42 <tag-desc> |
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43 writes a <literal>string</literal> to the error log |
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44 on the <literal>error</literal> level of logging |
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45 </tag-desc> |
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46 |
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47 <tag-name><literal>r.finish()</literal></tag-name> |
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48 <tag-desc> |
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49 finishes sending a response to the client |
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50 </tag-desc> |
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51 |
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52 <tag-name><literal>r.headersIn{}</literal></tag-name> |
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53 <tag-desc> |
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54 incoming headers object, read-only. |
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55 <para> |
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56 For example, the <literal>Foo</literal> header |
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57 can be accessed with the syntax <literal>headersIn.foo</literal> |
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58 or <literal>headersIn['Foo']</literal> |
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59 </para> |
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60 </tag-desc> |
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61 |
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62 <tag-name><literal>r.headersOut{}</literal></tag-name> |
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63 <tag-desc> |
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64 outgoing headers object, writable. |
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65 <para> |
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66 For example, the <literal>Foo</literal> header |
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67 can be accessed with the syntax <literal>headersOut.foo</literal> |
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68 or <literal>headersOut['Foo']</literal> |
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69 </para> |
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70 </tag-desc> |
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71 |
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72 <tag-name><literal>r.httpVersion</literal></tag-name> |
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73 <tag-desc> |
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74 HTTP version, read-only |
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75 </tag-desc> |
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76 |
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77 <tag-name><literal>r.log(<value>string</value>)</literal></tag-name> |
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78 <tag-desc> |
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79 writes a <literal>string</literal> to the error log |
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80 on the <literal>info</literal> level of logging |
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81 </tag-desc> |
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82 |
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83 <tag-name id="r_internal_redirect"><literal>r.internalRedirect(<value>uri</value>)</literal></tag-name> |
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84 <tag-desc> |
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85 performs an internal redirect to the specified <literal>uri</literal>. |
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86 If the uri starts with the “<literal>@</literal>” prefix, |
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87 it is considered a named location. |
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88 </tag-desc> |
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89 |
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90 <tag-name><literal>r.method</literal></tag-name> |
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91 <tag-desc> |
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92 HTTP method, read-only |
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93 </tag-desc> |
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94 |
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95 <tag-name><literal>r.parent</literal></tag-name> |
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96 <tag-desc> |
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97 references the parent request object |
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98 </tag-desc> |
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99 |
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100 <tag-name><literal>r.remoteAddress</literal></tag-name> |
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101 <tag-desc> |
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102 client address, read-only |
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103 </tag-desc> |
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104 |
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105 <tag-name><literal>r.requestBody</literal></tag-name> |
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106 <tag-desc> |
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107 holds the request body, read-only |
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108 </tag-desc> |
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109 |
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110 <tag-name><literal>r.responseBody</literal></tag-name> |
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111 <tag-desc> |
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112 holds the <link id="subrequest">subrequest</link> response body, read-only. |
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113 The size of <literal>r.responseBody</literal> is limited by the |
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114 <link doc="../http/ngx_http_core_module.xml" id="subrequest_output_buffer_size"/> |
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115 directive. |
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116 </tag-desc> |
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117 |
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118 <tag-name><literal>r.return(status[, string])</literal></tag-name> |
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119 <tag-desc> |
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120 sends the entire response |
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121 with the specified <literal>status</literal> to the client |
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122 <para> |
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123 It is possible to specify either a redirect URL |
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124 (for codes 301, 302, 303, 307, and 308) |
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125 or the response body text (for other codes) as the second argument |
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126 </para> |
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127 </tag-desc> |
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128 |
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129 <tag-name><literal>r.send(<value>string</value>)</literal></tag-name> |
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130 <tag-desc> |
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131 sends a part of the response body to the client |
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132 </tag-desc> |
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133 |
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134 <tag-name><literal>r.sendHeader()</literal></tag-name> |
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135 <tag-desc> |
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136 sends the HTTP headers to the client |
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137 </tag-desc> |
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138 |
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139 <tag-name><literal>r.status</literal></tag-name> |
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140 <tag-desc> |
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141 status, writable |
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142 </tag-desc> |
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143 |
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144 <tag-name><literal>r.variables{}</literal></tag-name> |
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145 <tag-desc> |
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146 nginx variables object, read-only |
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147 </tag-desc> |
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148 |
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149 <tag-name><literal>r.warn(<value>string</value>)</literal></tag-name> |
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150 <tag-desc> |
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151 writes a <literal>string</literal> to the error log |
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152 on the <literal>warning</literal> level of logging |
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153 </tag-desc> |
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154 |
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155 <tag-name><literal>r.uri</literal></tag-name> |
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156 <tag-desc> |
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157 current URI, read-only |
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158 </tag-desc> |
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159 |
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160 <tag-name id="subrequest"><literal>r.subrequest(<value>uri</value>[, |
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161 <value>options</value>[, <value>callback</value>]])</literal></tag-name> |
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162 <tag-desc> |
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163 creates a subrequest with the given <literal>uri</literal> and |
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164 <literal>options</literal>, and installs |
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165 an optional completion <literal>callback</literal>. |
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166 |
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167 <para> |
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168 If <literal>options</literal> is a string, then it |
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169 holds the subrequest arguments string. |
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170 Otherwise, <literal>options</literal> is expected to be |
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171 an object with the following keys: |
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172 <list type="tag"> |
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173 <tag-name><literal>args</literal></tag-name> |
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174 <tag-desc> |
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175 arguments string |
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176 </tag-desc> |
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177 <tag-name><literal>body</literal></tag-name> |
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178 <tag-desc> |
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179 request body |
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180 </tag-desc> |
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181 |
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182 <tag-name><literal>method</literal></tag-name> |
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183 <tag-desc> |
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184 HTTP method |
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185 </tag-desc> |
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186 |
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187 </list> |
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188 </para> |
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189 |
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190 <para> |
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191 The completion <literal>callback</literal> receives |
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192 a subrequest response object with methods and properties |
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193 identical to the parent request object. |
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194 </para> |
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195 </tag-desc> |
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196 |
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197 </list> |
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198 </para> |
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199 |
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200 </section> |
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201 |
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202 |
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203 <section id="stream" name="Stream Session"> |
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204 |
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205 <para> |
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206 The stream session object is available only in the |
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207 <link doc="../stream/ngx_stream_js_module.xml">ngx_stream_js_module</link> |
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208 module. |
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209 All string properties of the object are <link id="string">byte strings</link>. |
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210 </para> |
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211 |
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212 <para> |
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213 <note> |
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214 Prior to njs <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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215 the stream session object had some properties which are currently |
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216 <link id="stream_obsolete">removed</link>. |
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217 </note> |
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218 </para> |
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219 |
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220 <para> |
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221 <list type="tag"> |
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222 |
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223 <tag-name id="s_allow"><literal>s.allow()</literal></tag-name> |
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224 <tag-desc> |
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225 successfully finalizes the phase handler |
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226 (<link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>) |
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227 </tag-desc> |
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228 |
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229 <tag-name id="s_decline"><literal>s.decline()</literal></tag-name> |
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230 <tag-desc> |
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231 finalizes the phase handler and passes control to the next handler |
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232 (<link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>) |
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233 </tag-desc> |
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234 |
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235 <tag-name id="s_deny"><literal>s.deny()</literal></tag-name> |
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236 <tag-desc> |
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237 finalizes the phase handler with the access error code |
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238 (<link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>) |
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239 </tag-desc> |
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240 |
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241 <tag-name id="s_done"><literal>s.done</literal>(<value>[code]</value>)</tag-name> |
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242 <tag-desc> |
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243 successfully finalizes the current phase handler |
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244 or finalizes it with the specified numeric code |
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245 (<link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>). |
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246 </tag-desc> |
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247 |
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248 <tag-name><literal>s.error(<value>string</value>)</literal></tag-name> |
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249 <tag-desc> |
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250 writes a sent <literal>string</literal> to the error log |
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251 on the <literal>error</literal> level of logging |
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252 </tag-desc> |
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253 |
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254 <tag-name><literal>s.log(<value>string</value>)</literal></tag-name> |
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255 <tag-desc> |
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256 writes a sent <value>string</value> to the error log |
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257 on the <literal>info</literal> level of logging |
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258 </tag-desc> |
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259 |
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260 <tag-name id="s_off"><literal>s.off(<value>eventName</value>)</literal></tag-name> |
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261 <tag-desc> |
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262 unregisters the callback set by the <link id="s_on">s.on()</link> method |
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263 (<link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>) |
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264 </tag-desc> |
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265 |
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266 <tag-name id="s_on"><literal>s.on(<value>event</value>, |
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267 <value>callback</value>)</literal></tag-name> |
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268 <tag-desc> |
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269 registers a <literal>callback</literal> for the specified <literal>event</literal> |
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270 (<link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>). |
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271 |
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272 <para> |
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273 An <literal>event</literal> may be one of the following strings: |
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274 <list type="tag"> |
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275 <tag-name><literal>upload</literal></tag-name> |
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276 <tag-desc> |
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277 new data from a client |
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278 </tag-desc> |
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279 |
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280 <tag-name><literal>download</literal></tag-name> |
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281 <tag-desc> |
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282 new data to a client |
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283 </tag-desc> |
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284 |
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285 </list> |
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286 </para> |
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287 |
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288 <para> |
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289 The completion callback has the following prototype: |
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290 <literal>callback(data, flags)</literal>, where |
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291 <literal>data</literal> is string, |
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292 <literal>flags</literal> is an object |
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293 with the following properties: |
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294 <list type="tag"> |
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295 <tag-name id="s_on_callback_last"><literal>last</literal></tag-name> |
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296 <tag-desc> |
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297 a boolean value, true if data is a last buffer. |
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298 </tag-desc> |
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299 |
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300 </list> |
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301 </para> |
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302 </tag-desc> |
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303 |
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304 <tag-name><literal>s.remoteAddress</literal></tag-name> |
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305 <tag-desc> |
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306 client address, read-only |
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307 </tag-desc> |
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308 |
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309 <tag-name id="s_send"><literal>s.send(<value>data</value>[, |
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310 <value>options</value>])</literal></tag-name> |
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311 <tag-desc> |
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312 sends the data to the client |
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313 (<link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>). |
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314 The <literal>options</literal> is an object used |
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315 to override nginx buffer flags derived from an incoming data chunk buffer. |
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316 The flags can be overriden with the following flags: |
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317 <para> |
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318 <list type="tag"> |
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319 |
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320 <tag-name><literal>last</literal></tag-name> |
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321 <tag-desc> |
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322 boolean, true if the buffer is the last buffer |
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323 </tag-desc> |
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324 |
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325 <tag-name><literal>flush</literal></tag-name> |
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326 <tag-desc> |
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327 boolean, true if the buffer should have the <literal>flush</literal> flag |
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328 </tag-desc> |
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329 </list> |
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330 </para> |
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331 The method can be called multiple times per callback invocation. |
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332 </tag-desc> |
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333 |
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334 <tag-name><literal>s.variables{}</literal></tag-name> |
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335 <tag-desc> |
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336 nginx variables object, read-only |
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337 </tag-desc> |
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338 |
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339 <tag-name><literal>s.warn(<value>string</value>)</literal></tag-name> |
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340 <tag-desc> |
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341 writes a sent <literal>string</literal> to the error log |
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342 on the <literal>warning</literal> level of logging |
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343 </tag-desc> |
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344 |
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345 </list> |
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346 </para> |
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347 |
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348 |
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349 <section id="stream_obsolete" name="Obsolete properties"> |
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350 |
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351 <para> |
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352 These properties have been removed |
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353 in njs <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link> |
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354 and are not backward compatible with the existing njs code. |
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355 </para> |
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356 |
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357 <para> |
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358 <list type="tag"> |
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359 |
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360 <tag-name id="s_abort"><literal>s.ABORT</literal></tag-name> |
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361 <tag-desc> |
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362 the <literal>ABORT</literal> return code |
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363 <note> |
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364 Starting from njs <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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365 the <link id="s_deny">s.deny()</link> method should be used instead. |
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366 </note> |
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367 </tag-desc> |
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368 |
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369 <tag-name><literal>s.AGAIN</literal></tag-name> |
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370 <tag-desc> |
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371 the <literal>AGAIN</literal> return code |
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372 <note> |
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373 Starting from njs <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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374 the corresponding behavior is achieved if no |
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375 <link id="s_allow">s.allow()</link>, |
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376 <link id="s_deny">s.deny()</link>, |
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377 <link id="s_decline">s.decline()</link>, |
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378 <link id="s_done">s.done()</link> |
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379 is invoked and a callback is registered. |
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380 </note> |
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381 </tag-desc> |
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382 |
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383 <tag-name id="s_buffer"><literal>s.buffer</literal></tag-name> |
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384 <tag-desc> |
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385 the current buffer, writable |
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386 <note> |
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387 Starting from <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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388 the <link id="s_send">s.send()</link> method should be used for writing. |
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389 For reading, the current buffer is available as the first argument of the |
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390 <literal>event</literal> callback. |
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391 </note> |
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392 </tag-desc> |
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393 |
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394 <tag-name><literal>s.DECLINED</literal></tag-name> |
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395 <tag-desc> |
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396 the <literal>DECLINED</literal> return code |
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397 <note> |
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398 Starting from njs <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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399 the <link id="s_decline">s.decline()</link> method should be used instead. |
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400 </note> |
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401 </tag-desc> |
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402 |
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403 <tag-name><literal>s.eof</literal></tag-name> |
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404 <tag-desc> |
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405 a boolean read-only property, true if the current buffer is the last buffer |
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406 <note> |
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407 Starting from <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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408 the <link id="s_on_callback_last">flags.last</link> property |
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409 should be used instead. |
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410 </note> |
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411 </tag-desc> |
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412 |
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413 <tag-name><literal>s.ERROR</literal></tag-name> |
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414 <tag-desc> |
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415 the <literal>ERROR</literal> return code |
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416 <note> |
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417 Starting from njs <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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418 an appropriate exception can be thrown to report an error. |
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419 </note> |
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420 </tag-desc> |
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421 |
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422 <tag-name><literal>s.fromUpstream</literal></tag-name> |
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423 <tag-desc> |
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424 a boolean read-only property, |
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425 true if the current buffer is from the upstream server to the client |
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426 <note> |
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427 Starting from <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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428 a corresponding <link id="s_on">event</link> |
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429 (<literal>upload</literal> or <literal>download</literal>) |
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430 should be used to handle data to or from client. |
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431 </note> |
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432 </tag-desc> |
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433 |
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434 <tag-name id="s_ok"><literal>s.OK</literal></tag-name> |
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435 <tag-desc> |
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436 the <literal>OK</literal> return code |
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437 <note> |
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438 Starting from njs <link doc="../njs/changes.xml" id="njs0.2.4">0.2.4</link>, |
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439 the <link id="s_allow">s.allow()</link> method should be used instead. |
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440 </note> |
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441 </tag-desc> |
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442 |
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443 </list> |
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444 </para> |
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445 |
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446 </section> |
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447 |
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448 </section> |
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449 |
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450 </section> |
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451 |
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452 |
2176 | 453 <section id="core" name="Core"> |
454 | |
455 | |
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456 <section id="string" name="String"> |
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457 |
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458 <para> |
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459 There are two types of strings: |
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460 a <literal>Unicode string</literal> (default) and |
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461 a <literal>byte string</literal>. |
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462 </para> |
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463 |
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464 <para> |
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465 A <literal>Unicode string</literal> corresponds to an ECMAScript string |
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466 which contains Unicode characters. |
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467 </para> |
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468 |
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469 <para> |
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470 <literal>Byte strings</literal> contain a sequence of bytes. |
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471 They are used to serialize Unicode strings |
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472 to external data and deserialize from external sources. |
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473 For example, the <link id="string_toutf8">toUTF8()</link> method serializes |
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474 a Unicode string to a byte string using UTF8 encoding: |
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475 <example> |
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476 >> '£'.toUTF8().toString('hex') |
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477 'c2a3' /* C2 A3 is the UTF8 representation of 00A3 ('£') code point */ |
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478 </example> |
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479 The <link id="string_tobytes">toBytes()</link> method serializes |
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480 a Unicode string with code points up to 255 into a byte string, |
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481 otherwise, <literal>null</literal> is returned: |
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482 <example> |
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483 >> '£'.toBytes().toString('hex') |
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484 'a3' /* a3 is a byte equal to 00A3 ('£') code point */ |
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485 </example> |
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486 Only byte strings can be converted to different encodings. |
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487 For example, a string cannot be encoded to <literal>hex</literal> directly: |
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488 <example> |
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489 >> 'αβγδ'.toString('base64') |
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490 TypeError: argument must be a byte string |
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491 at String.prototype.toString (native) |
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492 at main (native) |
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493 </example> |
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494 To convert a Unicode string to hex, |
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495 first, it should be converted to a byte string and then to hex: |
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496 <example> |
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497 >> 'αβγδ'.toUTF8().toString('base64') |
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498 'zrHOss6zzrQ=' |
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499 </example> |
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500 |
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501 <list type="tag"> |
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502 |
2211
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503 <tag-name id="string_bytesfrom"><literal>String.bytesFrom(<value>array</value> |
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504 | <value>string</value>, <value>encoding</value>)</literal></tag-name> |
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505 <tag-desc> |
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506 (njs specific) Creates a byte string either from an array that contains octets, |
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507 or from an encoded string (0.2.3). |
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508 The encoding can be |
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509 <literal>hex</literal>, |
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510 <literal>base64</literal>, and |
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511 <literal>base64url</literal>. |
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512 <example> |
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513 >> String.bytesFrom([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]) |
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514 'buffer' |
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515 |
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516 >> String.bytesFrom('YnVmZmVy', 'base64') |
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517 'buffer' |
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518 </example> |
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519 </tag-desc> |
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520 |
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521 <tag-name><literal>String.fromCodePoint(<value>codePoint1</value>[, ...[, |
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522 <value>codePoint2</value>]])</literal></tag-name> |
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523 <tag-desc> |
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524 Returns a string from one or more Unicode code points. |
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525 <example> |
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526 >> String.fromCodePoint(97, 98, 99, 100) |
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527 'abcd' |
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528 </example> |
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529 </tag-desc> |
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530 |
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531 <tag-name><literal>String.prototype.concat(<value>string1</value>[, ..., |
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532 <value>stringN</value>])</literal></tag-name> |
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533 <tag-desc> |
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534 Returns a string that contains the concatenation of specified |
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535 <literal>strings</literal>. |
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536 <example> |
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537 >> "a".concat("b", "c") |
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538 'abc' |
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539 </example> |
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540 </tag-desc> |
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541 |
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542 <tag-name><literal>String.prototype.endsWith(<value>searchString</value>[, |
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543 <value>length</value>])</literal></tag-name> |
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544 <tag-desc> |
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545 Returns <literal>true</literal> if a string ends with the characters |
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546 of a specified string, otherwise <literal>false</literal>. |
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547 The optional <literal>length</literal> parameter is the the length of string. |
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548 If omitted, the default value is the length of the string. |
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549 <example> |
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550 >> 'abc'.endsWith('abc') |
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551 true |
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552 >> 'abca'.endsWith('abc') |
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553 false |
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554 </example> |
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555 </tag-desc> |
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556 |
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557 <tag-name><literal>String.prototype.fromBytes(<value>start</value>[, |
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558 <value>end</value>])</literal></tag-name> |
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559 <tag-desc> |
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560 (njs specific) Returns a new Unicode string from a byte string |
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561 where each byte is replaced with a corresponding Unicode code point. |
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562 </tag-desc> |
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563 |
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parents:
2183
diff
changeset
|
564 <tag-name><literal>String.prototype.fromUTF8(<value>start</value>[, |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
565 <value>end</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
566 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
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parents:
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diff
changeset
|
567 (njs specific) Converts a byte string containing a valid UTF8 string |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
568 into a Unicode string, |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
569 otherwise <literal>null</literal> is returned. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
570 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
571 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
572 <tag-name><literal>String.prototype.includes(<value>searchString</value>[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
573 <value>position</value>]))</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
574 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
575 Returns <literal>true</literal> if a string is found within another string, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
576 otherwise <literal>false</literal>. |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
577 The optional <literal>position</literal> parameter is the position |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
578 within the string at which to begin search for <literal>searchString</literal>. |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
579 Default value is 0. |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
580 <example> |
8e2b3aadc3ce
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
581 >> 'abc'.includes('bc') |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
582 true |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
583 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
584 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
585 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
586 <tag-name><literal>String.prototype.indexOf(<value>searchString</value>[, |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
587 <value>fromIndex</value>])</literal></tag-name> |
8e2b3aadc3ce
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parents:
2183
diff
changeset
|
588 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
589 Returns the position of the first occurrence |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
590 of the <literal>searchString</literal> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
591 The search is started at <literal>fromIndex</literal>. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
592 Returns <value>-1</value> if the value is not found. |
8e2b3aadc3ce
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parents:
2183
diff
changeset
|
593 The <literal>fromIndex</literal> is an integer, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
594 default value is 0. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
595 If <literal>fromIndex</literal> is lower than 0 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
596 or greater than |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
597 <link id="string_length">String.prototype.length</link><value></value>, |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
598 the search starts at index <value>0</value> and |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
599 <value>String.prototype.length</value>. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
600 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
601 >> 'abcdef'.indexOf('de', 2) |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
602 3 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
603 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
604 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
605 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
606 <tag-name><literal>String.prototype.lastIndexOf(<value>searchString</value>[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
607 <value>fromIndex</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
608 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
609 Returns the position of the last occurrence |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
610 of the <literal>searchString</literal>, |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
611 searching backwards from <literal>fromIndex</literal>. |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
612 Returns <value>-1</value> if the value is not found. |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
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changeset
|
613 If <literal>searchString</literal> is empty, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
614 then <literal>fromIndex</literal> is returned. |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
615 <example> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
616 >> "nginx".lastIndexOf("gi") |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
617 1 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
618 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
619 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
620 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
621 <tag-name id="string_length"><literal>String.prototype.length</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
622 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
623 Returns the length of the string. |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
624 <example> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
625 >> 'αβγδ'.length |
8e2b3aadc3ce
Added njs String object.
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parents:
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diff
changeset
|
626 4 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
627 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
628 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
629 |
8e2b3aadc3ce
Added njs String object.
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parents:
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changeset
|
630 <tag-name><literal>String.prototype.match([<value>regexp</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
631 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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changeset
|
632 Matches a string against a <literal>regexp</literal>. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
633 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
634 >> 'nginx'.match( /ng/i ) |
2214
e029f4bc7ede
Added quotes to njs examples.
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parents:
2212
diff
changeset
|
635 'ng' |
2186
8e2b3aadc3ce
Added njs String object.
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diff
changeset
|
636 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
637 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
638 |
2212
c34a885b9d99
Documented padEnd() and padStart() for njs.
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parents:
2211
diff
changeset
|
639 <tag-name id="string_padend"><literal>String.prototype.padEnd(<value>length</value> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
640 [, <value>string</value>])</literal></tag-name> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
641 <tag-desc> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
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parents:
2211
diff
changeset
|
642 Returns a string of a specified <literal>length</literal> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
643 with the pad <literal>string</literal> applied |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
644 to the end of the specified string (0.2.3). |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
645 <example> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
646 >> '1234'.padEnd(8, 'abcd') |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
647 '1234abcd' |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
648 </example> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
649 </tag-desc> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
650 |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
651 <tag-name id="string_padstart"><literal>String.prototype.padStart(<value>length</value> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
652 [, <value>string</value>])</literal></tag-name> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
653 <tag-desc> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
654 Returns a string of a specified <literal>length</literal> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
655 with the pad <literal>string</literal> applied |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
656 to the start of the specified string (0.2.3). |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
657 <example> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
658 >> '1234'.padStart(8, 'abcd') |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
659 'abcd1234' |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
660 </example> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
661 </tag-desc> |
c34a885b9d99
Documented padEnd() and padStart() for njs.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2211
diff
changeset
|
662 |
2186
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
663 <tag-name><literal>String.prototype.repeat(<value>number</value>)</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
664 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
665 Returns a string |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
666 with the specified <literal>number</literal> of copies of the string. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
667 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
668 >> 'abc'.repeat(3) |
2214
e029f4bc7ede
Added quotes to njs examples.
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parents:
2212
diff
changeset
|
669 'abcabcabc' |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
670 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
671 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
672 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
673 <tag-name><literal>String.prototype.replace([<value>regexp</value>|<value>string</value>[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
674 <value>string</value>|<value>function</value>]])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
675 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
676 Returns a new string with matches of a pattern |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
677 (<literal>string</literal> or a <literal>regexp</literal>) |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
678 replaced by a <literal>string</literal> or a <literal>function</literal>. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
679 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
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|
680 >> 'abcdefgh'.replace('d', 1) |
2214
e029f4bc7ede
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|
681 'abc1efgh' |
2186
8e2b3aadc3ce
Added njs String object.
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diff
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|
682 </example> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
683 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
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parents:
2183
diff
changeset
|
684 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
685 <tag-name><literal>String.prototype.search([<value>regexp</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
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diff
changeset
|
686 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
687 Searches for a string using a <literal>regexp</literal> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
688 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
689 >> 'abcdefgh'.search('def') |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
690 3 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
691 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
692 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
693 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
694 <tag-name><literal>String.prototype.slice(<value>start</value>[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
695 <value>end</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
696 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
697 Returns a new string containing a part of an |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
698 original string between <literal>start</literal> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
699 and <literal>end</literal> or |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
700 from <literal>start</literal> to the end of the string. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
701 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
702 >> 'abcdefghijklmno'.slice(NaN, 5) |
2214
e029f4bc7ede
Added quotes to njs examples.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2212
diff
changeset
|
703 'abcde' |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
704 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
705 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
706 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
707 <tag-name><literal>String.prototype.startsWith(<value>searchString</value>[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
708 <value>position</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
709 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
710 Returns <literal>true</literal> if a string begins with the characters |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
711 of a specified string, otherwise <literal>false</literal>. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
712 The optional <literal>position</literal> parameter is the position |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
713 in this string at which to begin search for <literal>searchString</literal>. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
714 Default value is 0. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
715 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
716 >> 'abc'.startsWith('abc') |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
717 true |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
718 > 'aabc'.startsWith('abc') |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
719 false |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
720 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
721 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
722 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
723 <tag-name><literal>String.prototype.substr(<value>start</value>[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
724 <value>length</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
725 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
726 Returns the part of the string of the specified <literal>length</literal> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
727 from <literal>start</literal> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
728 or from <literal>start</literal> to the end of the string. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
729 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
730 >> 'abcdefghijklmno'.substr(3, 5) |
2214
e029f4bc7ede
Added quotes to njs examples.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2212
diff
changeset
|
731 'defgh' |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
732 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
733 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
734 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
735 <tag-name><literal>String.prototype.substring(<value>start</value>[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
736 <value>end</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
737 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
738 Returns the part of the string between |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
739 <literal>start</literal> and <literal>end</literal> or |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
740 from <literal>start</literal> to the end of the string. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
741 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
742 >> 'abcdefghijklmno'.substring(3, 5) |
2214
e029f4bc7ede
Added quotes to njs examples.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2212
diff
changeset
|
743 'de' |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
744 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
745 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
746 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
747 <tag-name id="string_tobytes"><literal>String.prototype.toBytes(start[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
748 end])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
749 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
750 (njs specific) Serializes a Unicode string to a byte string. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
751 Returns <literal>null</literal> if a character larger than 255 is |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
752 found in the string. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
753 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
754 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
755 <tag-name><literal>String.prototype.toLowerCase()</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
756 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
757 Converts a string to lower case. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
758 The method supports only simple Unicode folding. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
759 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
760 >> 'ΑΒΓΔ'.toLowerCase() |
2214
e029f4bc7ede
Added quotes to njs examples.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2212
diff
changeset
|
761 'αβγδ' |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
762 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
763 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
764 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
765 <tag-name><literal>String.prototype.toString([<value>encoding</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
766 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
767 <para> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
768 If no <literal>encoding</literal> is specified, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
769 returns a specified Unicode string or byte string as in ECMAScript. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
770 </para> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
771 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
772 <para> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
773 (njs specific) If <literal>encoding</literal> is specified, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
774 encodes a <link id="string_tobytes">byte string</link> to |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
775 <literal>hex</literal>, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
776 <literal>base64</literal>, or |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
777 <literal>base64url</literal>. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
778 </para> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
779 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
780 >> 'αβγδ'.toUTF8().toString('base64url') |
2214
e029f4bc7ede
Added quotes to njs examples.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2212
diff
changeset
|
781 'zrHOss6zzrQ' |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
782 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
783 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
784 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
785 <tag-name><literal>String.prototype.toUpperCase()</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
786 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
787 Converts a string to upper case. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
788 The method supports only simple Unicode folding. |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
789 <example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
790 >> 'αβγδ'.toUpperCase() |
2214
e029f4bc7ede
Added quotes to njs examples.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2212
diff
changeset
|
791 'ΑΒΓΔ' |
2186
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
792 </example> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
793 </tag-desc> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
794 |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
795 <tag-name id="string_toutf8"><literal>String.prototype.toUTF8(<value>start</value>[, |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
796 <value>end</value>])</literal></tag-name> |
8e2b3aadc3ce
Added njs String object.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2183
diff
changeset
|
797 <tag-desc> |
8e2b3aadc3ce
Added njs String object.
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798 (njs specific) Serializes a Unicode string |
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799 to a byte string using UTF8 encoding. |
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800 <example> |
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801 >> 'αβγδ'.toUTF8().length |
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802 8 |
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|
803 >> 'αβγδ'.length |
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804 4 |
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|
805 </example> |
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|
806 </tag-desc> |
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807 |
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808 <tag-name><literal>String.prototype.trim()</literal></tag-name> |
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809 <tag-desc> |
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810 Removes whitespaces from both ends of a string. |
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|
811 <example> |
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|
812 >> ' abc '.trim() |
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813 'abc' |
2186
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|
814 </example> |
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|
815 </tag-desc> |
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|
816 |
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817 <tag-name><literal>String.prototype.split(([<value>string</value>|<value>regexp</value>[, |
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818 <value>limit</value>]]))</literal></tag-name> |
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819 <tag-desc> |
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820 Returns match of a string against a <literal>regexp</literal>. |
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821 The optional <literal>limit</literal> parameter is an integer that specifies |
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822 a limit on the number of splits to be found. |
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823 <example> |
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824 >> 'abc'.split('') |
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825 [ |
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826 'a', |
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827 'b', |
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828 'c' |
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829 ] |
2186
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|
830 </example> |
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831 </tag-desc> |
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|
832 |
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|
833 <tag-name id="encodeuri"><literal>encodeURI(<value>URI</value>)</literal></tag-name> |
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834 <tag-desc> |
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835 encodes a URI by replacing each instance of certain characters by |
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836 one, two, three, or four escape sequences |
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837 representing the UTF-8 encoding of the character |
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|
838 <example> |
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|
839 >> encodeURI('012αβγδ') |
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840 '012%CE%B1%CE%B2%CE%B3%CE%B4' |
2186
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|
841 </example> |
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842 </tag-desc> |
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|
843 |
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844 <tag-name><literal>encodeURIComponent(<value>encodedURIString</value>)</literal></tag-name> |
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845 <tag-desc> |
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846 Encodes a URI by replacing each instance of certain characters |
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847 by one, two, three, or four escape sequences |
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848 representing the UTF-8 encoding of the character. |
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849 <example> |
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850 >> encodeURIComponent('[@?=') |
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851 '%5B%40%3F%3D' |
2186
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852 </example> |
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853 </tag-desc> |
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|
854 |
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855 <tag-name><literal>decodeURI(<value>encodedURI</value>)</literal></tag-name> |
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856 <tag-desc> |
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857 Decodes a previously <link id="encodeuri">encoded</link> URI. |
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858 <example> |
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859 >> decodeURI('012%CE%B1%CE%B2%CE%B3%CE%B4') |
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860 '012αβγδ' |
2186
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861 </example> |
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862 </tag-desc> |
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863 |
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864 <tag-name><literal>decodeURIComponent(<value>decodedURIString</value>)</literal></tag-name> |
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865 <tag-desc> |
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866 Decodes an encoded component of a previously encoded URI. |
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867 <example> |
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868 >> decodeURIComponent('%5B%40%3F%3D') |
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869 '[@?=' |
2186
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870 </example> |
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871 </tag-desc> |
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|
872 |
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|
873 </list> |
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874 </para> |
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|
875 |
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876 </section> |
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877 |
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878 |
2176 | 879 <section id="core_json" name="JSON"> |
880 | |
881 <para> | |
882 The <literal>JSON</literal> object (ES 5.1) provides functions | |
883 to convert njs values to and from JSON format. | |
884 <list type="tag"> | |
885 | |
886 <tag-name><literal>JSON.parse(<value>string</value>[, | |
887 <value>reviver</value>])</literal></tag-name> | |
888 <tag-desc> | |
889 Converts a <literal>string</literal> that represents JSON data | |
890 into an njs object (<literal>{...}</literal>) or | |
891 array (<literal>[...]</literal>). | |
892 The optional <literal>reviver</literal> parameter is a function (key, value) | |
893 that will be called for each (key,value) pair and can transform the value. | |
894 </tag-desc> | |
895 | |
896 <tag-name><literal>JSON.stringify(<value>value</value>[, | |
897 <value>replacer</value>] [, <value>space</value>])</literal></tag-name> | |
898 <tag-desc> | |
899 Converts an njs object back to JSON. | |
900 The obligatory <literal>value</literal> parameter is generally a JSON | |
901 <literal>object</literal> or <literal>array</literal> that will be converted. | |
902 If the value has a <literal>toJSON()</literal> method, | |
903 it defines how the object will be serialized. | |
904 The optional <literal>replacer</literal> parameter is | |
905 a <literal>function</literal> or <literal>array</literal> | |
906 that transforms results. | |
907 The optional <literal>space</literal> parameter is | |
908 a <literal>string</literal> or <literal>number</literal>. | |
909 If it is a <literal>number</literal>, | |
910 it indicates the number of white spaces placed before a result | |
911 (no more than 10). | |
912 If it is a <literal>string</literal>, | |
913 it is used as a white space (or first 10 characters of it). | |
914 If omitted or is <literal>null</literal>, no white space is used. | |
915 </tag-desc> | |
916 </list> | |
917 </para> | |
918 | |
919 <para> | |
920 <example> | |
921 >> var json = JSON.parse('{"a":1, "b":true}') | |
922 >> json.a | |
923 1 | |
924 | |
925 >> JSON.stringify(json) | |
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926 '{"a":1,"b":true}' |
2176 | 927 |
928 >> JSON.stringify(json, undefined, 1) | |
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929 '{\n "a": 1,\n "b": true\n}' |
2176 | 930 |
931 >> JSON.stringify({ x: [10, undefined, function(){}] }) | |
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932 '{"x":[10,null,null]}' |
2176 | 933 |
934 >> JSON.stringify({"a":1, "toJSON": function() {return "xxx"}}) | |
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935 '"xxx"' |
2176 | 936 |
937 # Example with function replacer | |
938 | |
939 >> function replacer(key, value) {return (typeof value === 'string') ? undefined : value} | |
940 >>JSON.stringify({a:1, b:"b", c:true}, replacer) | |
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941 '{"a":1,"c":true}' |
2176 | 942 </example> |
943 </para> | |
944 | |
945 </section> | |
946 | |
2177 | 947 |
948 <section id="crypto" name="Crypto"> | |
949 | |
950 <para> | |
951 The Crypto module provides cryptographic functionality support. | |
952 The Crypto module object is returned by <literal>require('crypto')</literal>. | |
953 </para> | |
954 | |
955 <para> | |
956 <list type="tag"> | |
957 | |
958 <tag-name><literal>crypto.createHash(<value>algorithm</value>)</literal></tag-name> | |
959 <tag-desc> | |
960 Creates and returns a <link id="crypto_hash">Hash</link> object | |
961 that can be used to generate hash digests | |
962 using the given <value>algorithm</value>. | |
963 The algorighm can be | |
964 <literal>md5</literal>, | |
965 <literal>sha1</literal>, and | |
966 <literal>sha256</literal>. | |
967 </tag-desc> | |
968 | |
969 <tag-name><literal>crypto.createHmac(<value>algorithm</value>, | |
970 <value>secret key</value>)</literal></tag-name> | |
971 <tag-desc> | |
972 Creates and returns an <link id="crypto_hmac">HMAC</link> object | |
973 that uses the given <value>algorithm</value> and <value>secret key</value>. | |
974 The algorighm can be | |
975 <literal>md5</literal>, | |
976 <literal>sha1</literal>, and | |
977 <literal>sha256</literal>. | |
978 </tag-desc> | |
979 | |
980 </list> | |
981 </para> | |
982 | |
983 | |
984 <section id="crypto_hash" name="Hash"> | |
985 | |
986 <para> | |
987 <list type="tag"> | |
988 | |
989 <tag-name><literal>hash.update(<value>data</value>)</literal></tag-name> | |
990 <tag-desc> | |
991 Updates the hash content with the given <value>data</value>. | |
992 </tag-desc> | |
993 | |
994 <tag-name><literal>hash.digest([<value>encoding</value>])</literal></tag-name> | |
995 <tag-desc> | |
996 Calculates the digest of all of the data passed using | |
997 <literal>hash.update()</literal>. | |
998 The encoding can be | |
999 <literal>hex</literal>, | |
1000 <literal>base64</literal>, and | |
1001 <literal>base64url</literal>. | |
1002 If encoding is not provided, a byte string is returned. | |
1003 </tag-desc> | |
1004 | |
1005 </list> | |
1006 </para> | |
1007 | |
1008 <para> | |
1009 <example> | |
1010 >> var cr = require('crypto') | |
1011 undefined | |
1012 | |
1013 >> cr.createHash('sha1').update('A').update('B').digest('base64url') | |
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1014 'BtlFlCqiamG-GMPiK_GbvKjdK10' |
2177 | 1015 </example> |
1016 </para> | |
1017 | |
1018 </section> | |
1019 | |
1020 | |
1021 <section id="crypto_hmac" name="HMAC"> | |
1022 | |
1023 <para> | |
1024 <list type="tag"> | |
1025 | |
1026 <tag-name><literal>hmac.update(<value>data</value>)</literal></tag-name> | |
1027 <tag-desc> | |
1028 Updates the HMAC content with the given <value>data</value>. | |
1029 </tag-desc> | |
1030 | |
1031 <tag-name><literal>hmac.digest([<value>encoding</value>])</literal></tag-name> | |
1032 <tag-desc> | |
1033 Calculates the HMAC digest of all of the data passed using | |
1034 <literal>hmac.update()</literal>. | |
1035 The encoding can be | |
1036 <literal>hex</literal>, | |
1037 <literal>base64</literal>, and | |
1038 <literal>base64url</literal>. | |
1039 If encoding is not provided, a byte string is returned. | |
1040 </tag-desc> | |
1041 </list> | |
1042 </para> | |
1043 | |
1044 <para> | |
1045 <example> | |
1046 >> var cr = require('crypto') | |
1047 undefined | |
1048 | |
1049 >> cr.createHmac('sha1', 'secret.key').update('AB').digest('base64url') | |
2214
e029f4bc7ede
Added quotes to njs examples.
Yaroslav Zhuravlev <yar@nginx.com>
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2212
diff
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|
1050 'Oglm93xn23_MkiaEq_e9u8zk374' |
2177 | 1051 </example> |
1052 </para> | |
1053 | |
1054 </section> | |
1055 | |
1056 </section> | |
1057 | |
2203
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Added setTimeout and clearTimeout for njs.
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diff
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|
1058 <section id="njs_api_timers" name="Timers"> |
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diff
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|
1059 |
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|
1060 <para> |
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|
1061 |
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|
1062 <list type="tag"> |
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|
1063 |
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|
1064 <tag-name id="cleartimeout"><literal>clearTimeout(<value>timeout</value>)</literal></tag-name> |
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1065 <tag-desc> |
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|
1066 Cancels a <literal>timeout</literal> object |
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|
1067 created by <link id="settimeout">setTimeout()</link>. |
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1068 </tag-desc> |
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|
1069 |
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|
1070 <tag-name id="settimeout"><literal>setTimeout(<value>function</value>, |
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|
1071 <value>ms</value>[, <value>arg1</value>, <value>argN</value>])</literal></tag-name> |
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|
1072 <tag-desc> |
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|
1073 Calls a <literal>function</literal> |
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|
1074 after a specified number of <literal>milliseconds</literal>. |
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|
1075 One or more optional <literal>arguments</literal> |
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Added setTimeout and clearTimeout for njs.
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|
1076 can be passed to the specified function. |
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|
1077 Returns a <literal>timeout</literal> object. |
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|
1078 <example> |
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|
1079 function handler(v) |
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|
1080 { |
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|
1081 // ... |
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|
1082 } |
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|
1083 |
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|
1084 t = setTimeout(handler, 12); |
56a8cfb422ae
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|
1085 |
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|
1086 // ... |
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|
1087 |
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|
1088 clearTimeout(t); |
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Added setTimeout and clearTimeout for njs.
Yaroslav Zhuravlev <yar@nginx.com>
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|
1089 </example> |
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|
1090 </tag-desc> |
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|
1091 |
56a8cfb422ae
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diff
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|
1092 </list> |
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|
1093 </para> |
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|
1094 |
56a8cfb422ae
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diff
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|
1095 </section> |
56a8cfb422ae
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diff
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|
1096 |
2204
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|
1097 |
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|
1098 <section id="njs_api_fs" name="File System"> |
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|
1099 |
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|
1100 <para> |
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|
1101 The File System module provides operations with files. |
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1102 The module object is returned by <literal>require('fs')</literal>. |
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1103 <list type="tag"> |
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|
1104 |
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|
1105 <tag-name id="appendfilesync"><literal>appendFileSync(<value>filename</value>, |
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|
1106 <value>data</value>[, <value>options</value>])</literal></tag-name> |
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|
1107 <tag-desc> |
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|
1108 Synchronously appends specified <literal>data</literal> |
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|
1109 to a file with provided <literal>filename</literal>. |
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|
1110 If the file does not exist, it will be created. |
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|
1111 The <literal>options</literal> parameter is expected to be |
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|
1112 an object with the following keys: |
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|
1113 <list type="tag"> |
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|
1114 |
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|
1115 <tag-name><literal>mode</literal></tag-name> |
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|
1116 <tag-desc> |
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|
1117 mode option, by default is <literal>0o666</literal> |
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|
1118 </tag-desc> |
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|
1119 |
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|
1120 <tag-name><literal>flag</literal></tag-name> |
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|
1121 <tag-desc> |
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|
1122 file system <link id="njs_api_fs_flags">flag</link>, |
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|
1123 by default is <literal>a</literal> |
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|
1124 </tag-desc> |
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|
1125 |
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|
1126 </list> |
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|
1127 </tag-desc> |
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|
1128 |
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parents:
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|
1129 <tag-name id="readfilesync"><literal>readFileSync(<value>filename</value>[, |
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|
1130 <value>options</value>])</literal></tag-name> |
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|
1131 <tag-desc> |
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|
1132 Synchronously returns the contents of the file |
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Documented fileSystem methods in njs.
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|
1133 with provided <literal>filename</literal>. |
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Documented fileSystem methods in njs.
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|
1134 The <literal>options</literal> parameter holds |
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Documented fileSystem methods in njs.
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|
1135 <literal>string</literal> that specifies encoding. |
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|
1136 If not specified, a <link id="string_tobytes">byte string</link> is returned. |
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|
1137 If <literal>utf8</literal> encoding is specified, a Unicode string is returned. |
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|
1138 Otherwise, <literal>options</literal> is expected to be |
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|
1139 an object with the following keys: |
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|
1140 <list type="tag"> |
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|
1141 |
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|
1142 <tag-name><literal>encoding</literal></tag-name> |
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1143 <tag-desc> |
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1144 encoding, by default is not specified. |
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|
1145 The encoding can be <literal>utf8</literal> |
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|
1146 </tag-desc> |
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|
1147 |
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|
1148 <tag-name><literal>flag</literal></tag-name> |
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|
1149 <tag-desc> |
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|
1150 file system <link id="njs_api_fs_flags">flag</link>, |
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|
1151 by default is <literal>r</literal> |
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|
1152 </tag-desc> |
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|
1153 |
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|
1154 </list> |
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|
1155 <example> |
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|
1156 >> var fs = require('fs') |
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|
1157 undefined |
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|
1158 >> var file = fs.readFileSync('/file/path.tar.gz') |
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|
1159 undefined |
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|
1160 >> var gzipped = /^\x1f\x8b/.test(file); gzipped |
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|
1161 true |
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|
1162 </example> |
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|
1163 </tag-desc> |
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|
1164 |
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|
1165 <tag-name id="writefilesync"><literal>writeFileSync(<value>filename</value>, |
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|
1166 <value>data</value>[, |
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|
1167 <value>options</value>])</literal></tag-name> |
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|
1168 <tag-desc> |
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|
1169 Synchronously writes <literal>data</literal> to a file |
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|
1170 with provided <literal>filename</literal>. |
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|
1171 If the file does not exist, it will be created, |
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Yaroslav Zhuravlev <yar@nginx.com>
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|
1172 if the file exists, it will be replaced. |
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|
1173 The <literal>options</literal> parameter is expected to be |
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|
1174 an object with the following keys: |
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|
1175 <list type="tag"> |
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|
1176 <tag-name><literal>mode</literal></tag-name> |
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Yaroslav Zhuravlev <yar@nginx.com>
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1177 <tag-desc> |
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|
1178 mode option, by default is <literal>0o666</literal> |
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1179 </tag-desc> |
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|
1180 |
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1181 <tag-name><literal>flag</literal></tag-name> |
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1182 <tag-desc> |
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|
1183 file system <link id="njs_api_fs_flags">flag</link>, |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
1184 by default is <literal>w</literal> |
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Yaroslav Zhuravlev <yar@nginx.com>
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1185 </tag-desc> |
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|
1186 |
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1187 </list> |
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|
1188 <example> |
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|
1189 >> var fs = require('fs') |
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Yaroslav Zhuravlev <yar@nginx.com>
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1190 undefined |
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|
1191 >> var file = fs.writeFileSync('hello.txt', 'Hello world') |
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Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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1192 undefined |
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Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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|
1193 </example> |
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Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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|
1194 </tag-desc> |
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|
1195 |
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|
1196 </list> |
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|
1197 </para> |
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|
1198 |
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Yaroslav Zhuravlev <yar@nginx.com>
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|
1199 |
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|
1200 <section id="njs_api_fs_flags" name="File System Flags"> |
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Yaroslav Zhuravlev <yar@nginx.com>
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|
1201 |
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|
1202 <para> |
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|
1203 The <literal>flag</literal> option can accept the following values: |
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Yaroslav Zhuravlev <yar@nginx.com>
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|
1204 |
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|
1205 <list type= "bullet" compact="no"> |
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|
1206 |
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|
1207 <listitem> |
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|
1208 <literal>a</literal>—open a file for appending. |
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|
1209 The file is created if it does not exist |
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|
1210 </listitem> |
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|
1211 |
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Documented fileSystem methods in njs.
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|
1212 <listitem> |
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|
1213 <literal>ax</literal>—the same as <literal>a</literal> |
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|
1214 but fails if the file already exists |
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Documented fileSystem methods in njs.
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|
1215 </listitem> |
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|
1216 |
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|
1217 <listitem> |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
1218 <literal>a+</literal>—open a file for reading and appending. |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
1219 If the file does not exist, it will be created |
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parents:
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|
1220 </listitem> |
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|
1221 |
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Documented fileSystem methods in njs.
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|
1222 <listitem> |
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Documented fileSystem methods in njs.
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|
1223 <literal>ax+</literal>—the same as <literal>a+</literal> |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
1224 but fails if the file already exists |
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Documented fileSystem methods in njs.
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|
1225 </listitem> |
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Documented fileSystem methods in njs.
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|
1226 |
001f2d905fd9
Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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|
1227 <listitem> |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
1228 <literal>as</literal>—open a file for appending in synchronous mode. |
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Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
1229 If the file does not exist, it will be created |
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|
1230 </listitem> |
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|
1231 |
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Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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|
1232 <listitem> |
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Documented fileSystem methods in njs.
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|
1233 <literal>as+</literal>—open a file for reading and appending |
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|
1234 in synchronous mode. |
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|
1235 If the file does not exist, it will be created |
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Documented fileSystem methods in njs.
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|
1236 </listitem> |
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Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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|
1237 |
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Documented fileSystem methods in njs.
Yaroslav Zhuravlev <yar@nginx.com>
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|
1238 <listitem> |
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Documented fileSystem methods in njs.
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|
1239 <literal>r</literal>—open a file for reading. |
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|
1240 An exception occurs if the file does not exist |
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|
1241 </listitem> |
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|
1242 |
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|
1243 <listitem> |
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|
1244 <literal>r+</literal>—open a file for reading and writing. |
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|
1245 An exception occurs if the file does not exist |
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Documented fileSystem methods in njs.
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|
1246 </listitem> |
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Documented fileSystem methods in njs.
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|
1247 |
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|
1248 <listitem> |
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|
1249 <literal>rs+</literal>—open a file for reading and writing |
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|
1250 in synchronous mode. |
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Documented fileSystem methods in njs.
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|
1251 Instructs the operating system to bypass the local file system cache |
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|
1252 </listitem> |
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Documented fileSystem methods in njs.
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|
1253 |
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|
1254 <listitem> |
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Documented fileSystem methods in njs.
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|
1255 <literal>w</literal>—open a file for writing. |
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Documented fileSystem methods in njs.
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|
1256 If the file does not exist, it will be created. |
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Documented fileSystem methods in njs.
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|
1257 If the file exists, it will be replaced |
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Documented fileSystem methods in njs.
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|
1258 </listitem> |
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|
1259 |
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Documented fileSystem methods in njs.
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|
1260 <listitem> |
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|
1261 <literal>wx</literal>—the same as <literal>w</literal> |
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|
1262 but fails if the file already exists |
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Documented fileSystem methods in njs.
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|
1263 </listitem> |
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|
1264 |
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|
1265 <listitem> |
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|
1266 <literal>w+</literal>—open a file for reading and writing. |
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|
1267 If the file does not exist, it will be created. |
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Documented fileSystem methods in njs.
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|
1268 If the file exists, it will be replaced |
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Documented fileSystem methods in njs.
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|
1269 </listitem> |
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Documented fileSystem methods in njs.
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|
1270 |
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|
1271 <listitem> |
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|
1272 <literal>wx+</literal>—the same as <literal>w+</literal> |
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|
1273 but fails if the file already exists |
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Documented fileSystem methods in njs.
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1274 </listitem> |
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Documented fileSystem methods in njs.
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|
1275 |
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|
1276 </list> |
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|
1277 </para> |
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|
1278 |
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|
1279 </section> |
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|
1280 |
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|
1281 </section> |
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|
1282 |
2176 | 1283 </section> |
1284 | |
2175
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|
1285 </article> |