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comparison src/http/modules/ngx_http_chunked_filter_module.c @ 50:72eb30262aac NGINX_0_1_25

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nginx 0.1.25 *) Bugfix: nginx did run on Linux parisc. *) Feature: nginx now does not start under FreeBSD if the sysctl kern.ipc.somaxconn value is too big. *) Bugfix: if a request was internally redirected by the ngx_http_index_module module to the ngx_http_proxy_module or ngx_http_fastcgi_module modules, then the index file was not closed after request completion. *) Feature: the "proxy_pass" can be used in location with regular expression. *) Feature: the ngx_http_rewrite_filter_module module supports the condition like "if ($HTTP_USER_AGENT ~ MSIE)". *) Bugfix: nginx started too slow if the large number of addresses and text values were used in the "geo" directive. *) Change: a variable name must be declared as "$name" in the "geo" directive. The previous variant without "$" is still supported, but will be removed soon. *) Feature: the "%{VARIABLE}v" logging parameter. *) Feature: the "set $name value" directive. *) Bugfix: gcc 4.0 compatibility. *) Feature: the --with-openssl-opt=OPTIONS autoconfiguration directive.
author Igor Sysoev <http://sysoev.ru>
date Sat, 19 Mar 2005 00:00:00 +0300
parents
children b55cbf18157e
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49:93dabbc9efb9 50:72eb30262aac
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_http.h>
10
11
12 static ngx_int_t ngx_http_chunked_filter_init(ngx_cycle_t *cycle);
13
14
15 static ngx_http_module_t ngx_http_chunked_filter_module_ctx = {
16 NULL, /* pre conf */
17
18 NULL, /* create main configuration */
19 NULL, /* init main configuration */
20
21 NULL, /* create server configuration */
22 NULL, /* merge server configuration */
23
24 NULL, /* create location configuration */
25 NULL, /* merge location configuration */
26 };
27
28
29 ngx_module_t ngx_http_chunked_filter_module = {
30 NGX_MODULE,
31 &ngx_http_chunked_filter_module_ctx, /* module context */
32 NULL, /* module directives */
33 NGX_HTTP_MODULE, /* module type */
34 ngx_http_chunked_filter_init, /* init module */
35 NULL /* init process */
36 };
37
38
39 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
40 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
41
42
43 static ngx_int_t
44 ngx_http_chunked_header_filter(ngx_http_request_t *r)
45 {
46 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) {
47 return ngx_http_next_header_filter(r);
48 }
49
50 if (r->headers_out.content_length_n == -1) {
51 if (r->http_version < NGX_HTTP_VERSION_11) {
52 r->keepalive = 0;
53
54 } else {
55 r->chunked = 1;
56 }
57 }
58
59 return ngx_http_next_header_filter(r);
60 }
61
62
63 static ngx_int_t
64 ngx_http_chunked_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
65 {
66 u_char *chunk;
67 off_t size;
68 ngx_buf_t *b;
69 ngx_chain_t out, tail, *cl, *tl, **ll;
70
71 if (in == NULL || !r->chunked || r->header_only) {
72 return ngx_http_next_body_filter(r, in);
73 }
74
75 out.buf = NULL;
76 ll = &out.next;
77
78 size = 0;
79 cl = in;
80
81 for ( ;; ) {
82 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
83 "http chunk: %d", ngx_buf_size(cl->buf));
84
85 size += ngx_buf_size(cl->buf);
86
87 if (cl->buf->flush || ngx_buf_in_memory(cl->buf) || cl->buf->in_file) {
88
89 tl = ngx_alloc_chain_link(r->pool);
90 if (tl == NULL) {
91 return NGX_ERROR;
92 }
93
94 tl->buf = cl->buf;
95 *ll = tl;
96 ll = &tl->next;
97 }
98
99 if (cl->next == NULL) {
100 break;
101 }
102
103 cl = cl->next;
104 }
105
106 if (size) {
107 b = ngx_calloc_buf(r->pool);
108 if (b == NULL) {
109 return NGX_ERROR;
110 }
111
112 /* the "0000000000000000" is 64-bit hexadimal string */
113
114 chunk = ngx_palloc(r->pool, sizeof("0000000000000000" CRLF) - 1);
115 if (chunk == NULL) {
116 return NGX_ERROR;
117 }
118
119 b->temporary = 1;
120 b->pos = chunk;
121 b->last = ngx_sprintf(chunk, "%xO" CRLF, size);
122
123 out.buf = b;
124 }
125
126 if (cl->buf->last_buf) {
127 b = ngx_calloc_buf(r->pool);
128 if (b == NULL) {
129 return NGX_ERROR;
130 }
131
132 b->memory = 1;
133 b->last_buf = 1;
134 b->pos = (u_char *) CRLF "0" CRLF CRLF;
135 b->last = b->pos + 7;
136
137 cl->buf->last_buf = 0;
138
139 if (size == 0) {
140 b->pos += 2;
141 out.buf = b;
142 out.next = NULL;
143
144 return ngx_http_next_body_filter(r, &out);
145 }
146
147 } else {
148 if (size == 0) {
149 *ll = NULL;
150 return ngx_http_next_body_filter(r, out.next);
151 }
152
153 b = ngx_calloc_buf(r->pool);
154 if (b == NULL) {
155 return NGX_ERROR;
156 }
157
158 b->memory = 1;
159 b->pos = (u_char *) CRLF;
160 b->last = b->pos + 2;
161 }
162
163 tail.buf = b;
164 tail.next = NULL;
165 *ll = &tail;
166
167 return ngx_http_next_body_filter(r, &out);
168 }
169
170
171 static ngx_int_t
172 ngx_http_chunked_filter_init(ngx_cycle_t *cycle)
173 {
174 ngx_http_next_header_filter = ngx_http_top_header_filter;
175 ngx_http_top_header_filter = ngx_http_chunked_header_filter;
176
177 ngx_http_next_body_filter = ngx_http_top_body_filter;
178 ngx_http_top_body_filter = ngx_http_chunked_body_filter;
179
180 return NGX_OK;
181 }