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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 module SYSTEM "../../../../dtd/module.dtd">
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8
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9 <module name="Module ngx_http_spdy_module"
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10 link="/en/docs/http/ngx_http_spdy_module.html"
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11 lang="en"
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12 rev="1">
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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 The <literal>ngx_http_spdy_module</literal> module provides experimental
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18 support for <link url="http://www.chromium.org/spdy/spdy-protocol">SPDY</link>.
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19 Currently,
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20 <link url="http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft2">draft
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21 2</link> of SPDY protocol is implemented.
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22 </para>
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23
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24 <para>
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25 This module is not built by default, it should be enabled with
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26 the <literal>--with-http_spdy_module</literal>
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27 configuration parameter.
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28 </para>
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29
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30 </section>
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31
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32
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33 <section id="bugs" name="Known Bugs">
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34
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35 <para>
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36 The module is experimental, caveat emptor applies.
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37 </para>
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38
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39 <para>
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40 Current implementation of SPDY protocol does not support “server push”.
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41 </para>
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42
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43 <para>
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44 Processing of requests from SPDY connections cannot be rate
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45 <link doc="ngx_http_limit_req_module.xml">limited</link>.
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46 </para>
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47
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48 </section>
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49
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50
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51 <section id="example" name="Example Configuration">
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52
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53 <para>
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54 <example>
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55 server {
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56 listen 443 ssl spdy;
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57
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58 ssl_certificate server.crt;
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59 ssl_certificate_key server.key;
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60 ...
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61 }
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62 </example>
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63 <note>
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64 Note that in order to accept both
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65 <link doc="ngx_http_ssl_module.xml">HTTPS</link> and SPDY connections
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66 simultaneously on the same port,
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67 <link url="http://www.openssl.org">OpenSSL</link> library used should support
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68 “Next Protocol Negotiation” TLS extension, available since OpenSSL
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69 version 1.0.1.
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70 </note>
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71 </para>
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72
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73 </section>
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74
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75
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76 <section id="directives" name="Directives">
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77
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78 <directive name="spdy_headers_comp">
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79 <syntax><value>level</value></syntax>
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80 <default>0</default>
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81 <context>http</context>
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82 <context>server</context>
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83
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84 <para>
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85 Sets a header compression <value>level</value> of a response in a range from
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86 1 (fastest, less compression) to 9 (slowest, best compression).
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87 The special value 0 turns off header compression.
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88 </para>
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89
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90 </directive>
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91
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92 </section>
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93
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94
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95 <section id="variables" name="Embedded Variables">
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96
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97 <para>
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98 The <literal>ngx_http_spdy_module</literal> module
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99 supports the following embedded variables:
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100 <list type="tag" compact="no">
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101
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102 <tag-name id="var_spdy"><var>$spdy</var></tag-name>
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103 <tag-desc>
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104 SPDY protocol version for SPDY connections,
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105 or an empty string otherwise;
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106 </tag-desc>
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107
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108 <tag-name id="var_spdy_request_priority"><var>$spdy_request_priority</var>
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109 </tag-name>
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110 <tag-desc>
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111 request priority for SPDY connections,
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112 or an empty string otherwise.
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113 </tag-desc>
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114
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115 </list>
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116 </para>
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117
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118 </section>
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119
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120 </module>
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