Mercurial > hg > nginx

annotate src/http/ngx_http_postpone_filter_module.c @ 3064:23e6f26fb4bd

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*) ngx_http_ephemeral *) use preallocated terminal_posted_request
author Igor Sysoev <igor@sysoev.ru>
date Sun, 30 Aug 2009 09:47:11 +0000
parents 87b8c44906b5
children d620f497c50f
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 static ngx_int_t ngx_http_postpone_filter_add(ngx_http_request_t *r,
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13 ngx_chain_t *in);
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14 static ngx_int_t ngx_http_postpone_filter_init(ngx_conf_t *cf);
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17 static ngx_http_module_t ngx_http_postpone_filter_module_ctx = {
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18 NULL, /* preconfiguration */
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19 ngx_http_postpone_filter_init, /* postconfiguration */
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21 NULL, /* create main configuration */
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22 NULL, /* init main configuration */
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23
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24 NULL, /* create server configuration */
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25 NULL, /* merge server configuration */
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26
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27 NULL, /* create location configuration */
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28 NULL /* merge location configuration */
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29 };
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32 ngx_module_t ngx_http_postpone_filter_module = {
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33 NGX_MODULE_V1,
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34 &ngx_http_postpone_filter_module_ctx, /* module context */
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35 NULL, /* module directives */
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36 NGX_HTTP_MODULE, /* module type */
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37 NULL, /* init master */
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38 NULL, /* init module */
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39 NULL, /* init process */
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40 NULL, /* init thread */
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41 NULL, /* exit thread */
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42 NULL, /* exit process */
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43 NULL, /* exit master */
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44 NGX_MODULE_V1_PADDING
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45 };
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47
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48 static ngx_http_output_body_filter_pt ngx_http_next_filter;
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49
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50
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51 static ngx_int_t
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52 ngx_http_postpone_filter(ngx_http_request_t *r, ngx_chain_t *in)
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53 {
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54 ngx_connection_t *c;
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55 ngx_http_postponed_request_t *pr;
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56
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57 c = r->connection;
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58
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59 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
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60 "http postpone filter \"%V?%V\" %p", &r->uri, &r->args, in);
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61
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62 if (r != c->data) {
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63
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64 if (in) {
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65 ngx_http_postpone_filter_add(r, in);
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66 return NGX_OK;
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67 }
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68
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69 #if 0
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70 /* TODO: SSI may pass NULL */
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71 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
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72 "http postpone filter NULL inactive request",
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73 &r->uri, &r->args);
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74 #endif
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75
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76 return NGX_OK;
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77 }
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78
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79 if (r->postponed == NULL) {
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80
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81 if (in || c->buffered) {
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82 return ngx_http_next_filter(r->main, in);
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83 }
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84
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85 return NGX_OK;
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86 }
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87
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88 if (in) {
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89 ngx_http_postpone_filter_add(r, in);
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90 }
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91
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92 do {
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93 pr = r->postponed;
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94
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95 if (pr->request) {
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96
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97 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
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98 "http postpone filter wake \"%V?%V\"",
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99 &pr->request->uri, &pr->request->args);
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100
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101 r->postponed = pr->next;
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102
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103 c->data = pr->request;
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104
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105 return ngx_http_post_request(pr->request, NULL);
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106 }
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107
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108 if (pr->out == NULL) {
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109 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
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110 "http postpone filter NULL output",
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111 &r->uri, &r->args);
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112
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113 } else {
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114 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
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115 "http postpone filter output \"%V?%V\"",
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116 &r->uri, &r->args);
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117
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118 if (ngx_http_next_filter(r->main, pr->out) == NGX_ERROR) {
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119 return NGX_ERROR;
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120 }
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121 }
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122
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123 r->postponed = pr->next;
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124
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125 } while (r->postponed);
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126
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127 return NGX_OK;
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128 }
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129
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130
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131 static ngx_int_t
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132 ngx_http_postpone_filter_add(ngx_http_request_t *r, ngx_chain_t *in)
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133 {
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134 ngx_http_postponed_request_t *pr, **ppr;
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135
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136 if (r->postponed) {
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137 for (pr = r->postponed; pr->next; pr = pr->next) { /* void */ }
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138
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139 if (pr->request == NULL) {
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140 goto found;
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141 }
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142
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143 ppr = &pr->next;
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144
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145 } else {
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146 ppr = &r->postponed;
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147 }
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148
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149 pr = ngx_palloc(r->pool, sizeof(ngx_http_postponed_request_t));
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150 if (pr == NULL) {
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151 return NGX_ERROR;
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152 }
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153
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154 *ppr = pr;
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155
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156 pr->request = NULL;
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157 pr->out = NULL;
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158 pr->next = NULL;
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159
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160 found:
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161
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162 if (ngx_chain_add_copy(r->pool, &pr->out, in) == NGX_OK) {
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163 return NGX_OK;
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164 }
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165
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166 return NGX_ERROR;
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167 }
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168
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diff changeset
169
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170 static ngx_int_t
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7e24168b0853 nginx-0.4.0-RELEASE import
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parents: 667
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171 ngx_http_postpone_filter_init(ngx_conf_t *cf)
509
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parents:
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172 {
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parents:
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173 ngx_http_next_filter = ngx_http_top_body_filter;
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parents:
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174 ngx_http_top_body_filter = ngx_http_postpone_filter;
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parents:
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175
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parents:
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176 return NGX_OK;
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parents:
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177 }