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annotate xml/en/docs/http/ngx_http_gzip_module.xml @ 364:bb51d3e17dd0

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Style fixed.
author Ruslan Ermilov <ru@nginx.com>
date Fri, 27 Jan 2012 10:39:12 +0000
parents a4fa80755eab
children 694db9597ee0
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330
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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1 <?xml version="1.0"?>
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2
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3 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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4
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5 <module name="Module ngx_http_gzip_module"
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6 link="/en/docs/http/ngx_http_gzip_module.html"
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7 lang="en">
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8
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9 <section id="summary">
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10
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11 <para>
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12 The <literal>ngx_http_gzip_module</literal> module is a filter
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13 that compresses responses using the “gzip” method.
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14 This often allows to reduce the size of transmitted data by half or even more.
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15 </para>
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16
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17 </section>
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18
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19
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20 <section id="example" name="Example Configuration">
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21
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22 <para>
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23 <example>
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24 gzip on;
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25 gzip_min_length 1000;
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26 gzip_proxied expired no-cache no-store private auth;
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27 gzip_types text/plain application/xml;
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28 </example>
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29 </para>
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30
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31 <para>
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32 The <var>$gzip_ratio</var> variable can be used to log the
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33 achieved compression ratio.
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34 </para>
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35
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36 </section>
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37
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38
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39 <section id="directives" name="Directives">
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40
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41 <directive name="gzip">
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42 <syntax><literal>on</literal> | <literal>off</literal></syntax>
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43 <default>off</default>
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44 <context>http</context>
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45 <context>server</context>
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46 <context>location</context>
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47 <context>if in location</context>
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48
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49 <para>
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50 Enables or disables gzipping of responses.
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51 </para>
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52
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53 </directive>
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54
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55
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56 <directive name="gzip_buffers">
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57 <syntax><value>number</value> <value>size</value></syntax>
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58 <default>32 4k|16 8k</default>
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59 <context>http</context>
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60 <context>server</context>
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61 <context>location</context>
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62
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63 <para>
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64 Sets the <value>number</value> and <value>size</value> of buffers
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65 used to compress a response.
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66 By default, the buffer size is equal to one memory page.
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67 This is either 4K or 8K, depending on a platform.
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68 <note>
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69 Until version 0.7.28, four 4K or 8K buffers were used by default.
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70 </note>
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71 </para>
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72
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73 </directive>
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74
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75
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76 <directive name="gzip_comp_level">
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77
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78 <syntax><value>level</value></syntax>
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79 <default>1</default>
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80 <context>http</context>
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81 <context>server</context>
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82 <context>location</context>
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83
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84 <para>
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85 Sets a gzip compression <value>level</value> of a response.
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86 Acceptable values are in the 1..9 range.
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87 </para>
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88
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89 </directive>
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90
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91
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92 <directive name="gzip_disable">
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93 <syntax><value>regex</value> ...</syntax>
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94 <default/>
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95 <context>http</context>
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96 <context>server</context>
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97 <context>location</context>
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98 <appeared-in>0.6.23</appeared-in>
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99
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100 <para>
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101 Disables gzipping of responses for requests with
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102 <header>User-Agent</header> header fields matching
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103 any of the specified regular expressions.
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104 </para>
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105
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106 <para>
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107 The special mask “<literal>msie6</literal>” (0.7.12) corresponds to
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108 the regular expression “<literal>MSIE [4-6]\.</literal>” but works faster.
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109 Starting from version 0.8.11, “<literal>MSIE 6.0; ... SV1</literal>”
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110 is excluded from this mask.
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111 </para>
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112
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113 </directive>
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114
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115
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116 <directive name="gzip_min_length">
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117 <syntax><value>length</value></syntax>
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118 <default>20</default>
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119 <context>http</context>
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120 <context>server</context>
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121 <context>location</context>
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122
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123 <para>
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124 Sets the minimum length of a response that will be gzipped.
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125 The length is determined only from the <header>Content-Length</header>
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126 response header field.
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127 </para>
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128
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129 </directive>
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130
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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131
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132 <directive name="gzip_http_version">
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133 <syntax><literal>1.0</literal> | <literal>1.1</literal></syntax>
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134 <default>1.1</default>
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135 <context>http</context>
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136 <context>server</context>
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137 <context>location</context>
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138
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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139 <para>
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140 Sets the minimum HTTP version of a request required to compress a response.
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141 </para>
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142
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143 </directive>
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144
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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145
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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146 <directive name="gzip_proxied">
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147 <syntax>
364
bb51d3e17dd0 Style fixed.
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diff changeset
148 <literal>off</literal> |
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diff changeset
149 <literal>expired</literal> |
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diff changeset
150 <literal>no-cache</literal> |
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diff changeset
151 <literal>no-store</literal> |
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diff changeset
152 <literal>private</literal> |
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diff changeset
153 <literal>no_last_modified</literal> |
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154 <literal>no_etag</literal> |
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diff changeset
155 <literal>auth</literal> |
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diff changeset
156 <literal>any</literal>
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157 ...</syntax>
330
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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158 <default>off</default>
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159 <context>http</context>
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160 <context>server</context>
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161 <context>location</context>
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162
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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163 <para>
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164 Enables or disables gzipping of responses for proxied
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165 requests depending on the request and response.
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166 The fact that the response is proxied is determined based on
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167 the presence of the <header>Via</header> request header field.
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168 A directive accepts multiple parameters:
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169 <list type="tag">
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170
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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171 <tag-name><literal>off</literal></tag-name>
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172 <tag-desc>
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173 disables compression for all proxied requests,
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174 ignoring other parameters;
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175 </tag-desc>
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176
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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177 <tag-name><literal>expired</literal></tag-name>
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178 <tag-desc>
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179 enables compression if a response header includes the field
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180 <header>Expires</header> with a value that disables caching;
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181 </tag-desc>
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182
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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183 <tag-name><literal>no-cache</literal></tag-name>
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184 <tag-desc>
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185 enables compression if a response header includes the field
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186 <header>Cache-Control</header> with the parameter “<literal>no-cache</literal>”;
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187 </tag-desc>
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188
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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189 <tag-name><literal>no-store</literal></tag-name>
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190 <tag-desc>
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191 enables compression if a response header includes the field
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192 <header>Cache-Control</header> with the parameter
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193 “<literal>no-store</literal>”;
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194 </tag-desc>
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195
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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196 <tag-name><literal>private</literal></tag-name>
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197 <tag-desc>
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198 enables compression if a response header includes the field
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199 <header>Cache-Control</header> with the parameter “<literal>private</literal>”;
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200 </tag-desc>
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201
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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diff changeset
202 <tag-name><literal>no_last_modified</literal></tag-name>
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203 <tag-desc>
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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204 enables compression if a response header does not include the field
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205 <header>Last-Modified</header>;
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206 </tag-desc>
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207
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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208 <tag-name><literal>no_etag</literal></tag-name>
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209 <tag-desc>
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210 enables compression if a response header does not include the field
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211 <header>ETag</header>;
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212 </tag-desc>
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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213
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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214 <tag-name><literal>auth</literal></tag-name>
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215 <tag-desc>
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216 enables compression if a request header includes the field
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217 <header>Authorization</header>;
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218 </tag-desc>
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219
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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diff changeset
220 <tag-name><literal>any</literal></tag-name>
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221 <tag-desc>
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222 enables compression for all proxied requests.
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223 </tag-desc>
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224
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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225 </list>
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226 </para>
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227
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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228 </directive>
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229
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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230
f94bcab2a6ae Translated ngx_http_gzip_module and ngx_http_gzip_static_module.
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231 <directive name="gzip_types">
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232 <syntax><value>mime-type</value> ...</syntax>
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233 <default>text/html</default>
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234 <context>http</context>
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235 <context>server</context>
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236 <context>location</context>
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237
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238 <para>
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239 Enables gzipping of responses for the specified MIME types in addition
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240 to “<literal>text/html</literal>”.
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241 Responses with the type “<literal>text/html</literal>” are always compressed.
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242 </para>
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243
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244 </directive>
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245
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246
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247 <directive name="gzip_vary">
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248 <syntax><literal>on</literal> | <literal>off</literal></syntax>
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249 <default>off</default>
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250 <context>http</context>
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251 <context>server</context>
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252 <context>location</context>
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253
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254 <para>
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255 Enables or disables emitting the <header>Vary: Accept-Encoding</header>
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256 response header field if the directives
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257 <link id="gzip"/> or
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258 <link doc="ngx_http_gzip_static_module.xml" id="gzip_static"/>
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259 are active.
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260 </para>
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261
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262 </directive>
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263
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264 </section>
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265
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266 </module>