annotate src/http/modules/ngx_http_chunked_filter_module.c @ 58:b55cbf18157e NGINX_0_1_29

nginx 0.1.29 *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; bug appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
author Igor Sysoev <http://sysoev.ru>
date Thu, 12 May 2005 00:00:00 +0400
parents 72eb30262aac
children 71c46860eb55
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50
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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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5
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6
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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_chunked_filter_init(ngx_cycle_t *cycle);
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13
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14
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15 static ngx_http_module_t ngx_http_chunked_filter_module_ctx = {
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16 NULL, /* preconfiguration */
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17 NULL, /* postconfiguration */
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18
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19 NULL, /* create main configuration */
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20 NULL, /* init main configuration */
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21
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22 NULL, /* create server configuration */
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23 NULL, /* merge server configuration */
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24
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25 NULL, /* create location configuration */
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26 NULL, /* merge location configuration */
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27 };
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28
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29
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30 ngx_module_t ngx_http_chunked_filter_module = {
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31 NGX_MODULE_V1,
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32 &ngx_http_chunked_filter_module_ctx, /* module context */
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33 NULL, /* module directives */
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34 NGX_HTTP_MODULE, /* module type */
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35 ngx_http_chunked_filter_init, /* init module */
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36 NULL /* init process */
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37 };
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38
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39
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40 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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41 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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43
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44 static ngx_int_t
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45 ngx_http_chunked_header_filter(ngx_http_request_t *r)
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46 {
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47 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED || r->main) {
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48 return ngx_http_next_header_filter(r);
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49 }
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50
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51 if (r->headers_out.content_length_n == -1) {
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52 if (r->http_version < NGX_HTTP_VERSION_11) {
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53 r->keepalive = 0;
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54
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55 } else {
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56 r->chunked = 1;
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57 }
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58 }
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59
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60 return ngx_http_next_header_filter(r);
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61 }
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62
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63
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64 static ngx_int_t
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65 ngx_http_chunked_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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66 {
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67 u_char *chunk;
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68 off_t size;
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69 ngx_buf_t *b;
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70 ngx_chain_t out, tail, *cl, *tl, **ll;
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71
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72 if (in == NULL || !r->chunked || r->header_only) {
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73 return ngx_http_next_body_filter(r, in);
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74 }
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75
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76 out.buf = NULL;
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77 ll = &out.next;
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78
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79 size = 0;
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80 cl = in;
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81
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82 for ( ;; ) {
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83 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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84 "http chunk: %d", ngx_buf_size(cl->buf));
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85
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86 size += ngx_buf_size(cl->buf);
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87
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88 if (cl->buf->flush || ngx_buf_in_memory(cl->buf) || cl->buf->in_file) {
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89
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90 tl = ngx_alloc_chain_link(r->pool);
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91 if (tl == NULL) {
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92 return NGX_ERROR;
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93 }
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94
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95 tl->buf = cl->buf;
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96 *ll = tl;
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97 ll = &tl->next;
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98 }
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99
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100 if (cl->next == NULL) {
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101 break;
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102 }
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103
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104 cl = cl->next;
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105 }
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106
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107 if (size) {
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108 b = ngx_calloc_buf(r->pool);
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109 if (b == NULL) {
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110 return NGX_ERROR;
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111 }
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112
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113 /* the "0000000000000000" is 64-bit hexadimal string */
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114
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115 chunk = ngx_palloc(r->pool, sizeof("0000000000000000" CRLF) - 1);
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116 if (chunk == NULL) {
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117 return NGX_ERROR;
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118 }
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119
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120 b->temporary = 1;
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121 b->pos = chunk;
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122 b->last = ngx_sprintf(chunk, "%xO" CRLF, size);
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123
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124 out.buf = b;
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125 }
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126
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127 if (cl->buf->last_buf) {
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128 b = ngx_calloc_buf(r->pool);
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129 if (b == NULL) {
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130 return NGX_ERROR;
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131 }
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132
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133 b->memory = 1;
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134 b->last_buf = 1;
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135 b->pos = (u_char *) CRLF "0" CRLF CRLF;
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136 b->last = b->pos + 7;
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137
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138 cl->buf->last_buf = 0;
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139
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140 if (size == 0) {
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141 b->pos += 2;
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142 out.buf = b;
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143 out.next = NULL;
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144
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145 return ngx_http_next_body_filter(r, &out);
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146 }
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147
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148 } else {
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149 if (size == 0) {
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150 *ll = NULL;
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151 return ngx_http_next_body_filter(r, out.next);
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152 }
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153
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154 b = ngx_calloc_buf(r->pool);
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155 if (b == NULL) {
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156 return NGX_ERROR;
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157 }
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158
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159 b->memory = 1;
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160 b->pos = (u_char *) CRLF;
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161 b->last = b->pos + 2;
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162 }
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163
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164 tail.buf = b;
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165 tail.next = NULL;
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166 *ll = &tail;
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167
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168 return ngx_http_next_body_filter(r, &out);
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169 }
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170
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171
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172 static ngx_int_t
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173 ngx_http_chunked_filter_init(ngx_cycle_t *cycle)
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174 {
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175 ngx_http_next_header_filter = ngx_http_top_header_filter;
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176 ngx_http_top_header_filter = ngx_http_chunked_header_filter;
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177
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178 ngx_http_next_body_filter = ngx_http_top_body_filter;
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179 ngx_http_top_body_filter = ngx_http_chunked_body_filter;
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180
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181 return NGX_OK;
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182 }