Mercurial > hg > nginx
annotate src/http/ngx_http_write_filter_module.c @ 527:7fa11e5c6e96 release-0.1.38
nginx-0.1.38-RELEASE import
*) Feature: the "limit_rate" directive is supported in in proxy and
FastCGI mode.
*) Feature: the "X-Accel-Limit-Rate" response header line is supported
in proxy and FastCGI mode.
*) Feature: the "break" directive.
*) Feature: the "log_not_found" directive.
*) Bugfix: the response status code was not changed when request was
redirected by the ""X-Accel-Redirect" header line.
*) Bugfix: the variables set by the "set" directive could not be used
in SSI.
*) Bugfix: the segmentation fault may occurred if the SSI page has more
than one remote subrequest.
*) Bugfix: nginx treated the backend response as invalid if the status
line in the header was transferred in two packets; the bug had
appeared in 0.1.29.
*) Feature: the "ssi_types" directive.
*) Feature: the "autoindex_exact_size" directive.
*) Bugfix: the ngx_http_autoindex_module did not support the long file
names in UTF-8.
*) Feature: the IMAP/POP3 proxy.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Fri, 08 Jul 2005 14:34:20 +0000 |
| parents | fbbf16224844 |
| children | b09ee85d0ac8 |
| rev | line source |
|---|---|
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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_event.h> |
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10 #include <ngx_http.h> |
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13 static ngx_int_t ngx_http_write_filter_init(ngx_cycle_t *cycle); |
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16 ngx_http_module_t ngx_http_write_filter_module_ctx = { |
| 509 | 17 NULL, /* preconfiguration */ |
| 18 NULL, /* postconfiguration */ | |
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20 NULL, /* create main configuration */ |
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21 NULL, /* init main configuration */ |
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22 |
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23 NULL, /* create server configuration */ |
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24 NULL, /* merge server configuration */ |
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26 NULL, /* create location configuration */ |
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27 NULL, /* merge location configuration */ |
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28 }; |
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29 |
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30 |
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31 ngx_module_t ngx_http_write_filter_module = { |
| 509 | 32 NGX_MODULE_V1, |
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33 &ngx_http_write_filter_module_ctx, /* module context */ |
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34 NULL, /* module directives */ |
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35 NGX_HTTP_MODULE, /* module type */ |
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36 ngx_http_write_filter_init, /* init module */ |
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37 NULL /* init process */ |
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38 }; |
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39 |
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40 |
| 501 | 41 ngx_int_t |
| 42 ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
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43 { |
| 509 | 44 off_t size, sent; |
| 45 ngx_uint_t last, flush; | |
| 46 ngx_chain_t *cl, *ln, **ll, *chain; | |
| 47 ngx_connection_t *c; | |
| 48 ngx_http_core_loc_conf_t *clcf; | |
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49 |
| 527 | 50 c = r->connection; |
| 51 | |
| 52 if (c->closed) { | |
| 53 return NGX_ERROR; | |
| 54 } | |
| 55 | |
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56 size = 0; |
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57 flush = 0; |
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58 last = 0; |
| 509 | 59 ll = &r->out; |
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60 |
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61 /* find the size, the flush point and the last link of the saved chain */ |
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62 |
| 509 | 63 for (cl = r->out; cl; cl = cl->next) { |
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64 ll = &cl->next; |
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65 |
| 479 | 66 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, |
| 67 "write old buf t:%d f:%d %p, pos %p, size: %z " | |
| 68 "file: %O, size: %z", | |
| 69 cl->buf->temporary, cl->buf->in_file, | |
| 70 cl->buf->start, cl->buf->pos, | |
| 71 cl->buf->last - cl->buf->pos, | |
| 72 cl->buf->file_pos, | |
| 73 cl->buf->file_last - cl->buf->file_pos); | |
| 74 | |
| 461 | 75 #if 1 |
| 76 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
| 479 | 77 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
| 483 | 78 "zero size buf in writer " |
| 79 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
| 80 cl->buf->temporary, | |
| 81 cl->buf->recycled, | |
| 82 cl->buf->in_file, | |
| 83 cl->buf->start, | |
| 84 cl->buf->pos, | |
| 85 cl->buf->last, | |
| 86 cl->buf->file, | |
| 87 cl->buf->file_pos, | |
| 88 cl->buf->file_last); | |
| 89 | |
| 461 | 90 ngx_debug_point(); |
| 489 | 91 return NGX_ERROR; |
| 461 | 92 } |
| 93 #endif | |
| 94 | |
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95 size += ngx_buf_size(cl->buf); |
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96 |
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97 if (cl->buf->flush || cl->buf->recycled) { |
| 499 | 98 flush = 1; |
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99 } |
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100 |
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101 if (cl->buf->last_buf) { |
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102 last = 1; |
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103 } |
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104 } |
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105 |
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106 /* add the new chain to the existent one */ |
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107 |
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108 for (ln = in; ln; ln = ln->next) { |
| 501 | 109 cl = ngx_alloc_chain_link(r->pool); |
| 110 if (cl == NULL) { | |
| 461 | 111 return NGX_ERROR; |
| 112 } | |
| 113 | |
| 114 cl->buf = ln->buf; | |
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115 *ll = cl; |
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116 ll = &cl->next; |
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117 |
| 479 | 118 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, |
| 119 "write new buf t:%d f:%d %p, pos %p, size: %z " | |
| 120 "file: %O, size: %z", | |
| 121 cl->buf->temporary, cl->buf->in_file, | |
| 122 cl->buf->start, cl->buf->pos, | |
| 123 cl->buf->last - cl->buf->pos, | |
| 124 cl->buf->file_pos, | |
| 125 cl->buf->file_last - cl->buf->file_pos); | |
| 126 | |
| 461 | 127 #if 1 |
| 128 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
| 479 | 129 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
| 483 | 130 "zero size buf in writer " |
| 131 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
| 132 cl->buf->temporary, | |
| 133 cl->buf->recycled, | |
| 134 cl->buf->in_file, | |
| 135 cl->buf->start, | |
| 136 cl->buf->pos, | |
| 137 cl->buf->last, | |
| 138 cl->buf->file, | |
| 139 cl->buf->file_pos, | |
| 140 cl->buf->file_last); | |
| 141 | |
| 461 | 142 ngx_debug_point(); |
| 489 | 143 return NGX_ERROR; |
| 461 | 144 } |
| 145 #endif | |
| 146 | |
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147 size += ngx_buf_size(cl->buf); |
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148 |
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149 if (cl->buf->flush || cl->buf->recycled) { |
| 499 | 150 flush = 1; |
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151 } |
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152 |
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153 if (cl->buf->last_buf) { |
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154 last = 1; |
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155 } |
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156 } |
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157 |
| 461 | 158 *ll = NULL; |
| 159 | |
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160 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| 499 | 161 "http write filter: l:%d f:%d s:%O", last, flush, size); |
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162 |
| 509 | 163 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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164 |
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165 /* |
| 509 | 166 * avoid the output if there are no last buf, no flush point, |
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e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
167 * there are the incoming bufs and the size of all bufs |
|
332
159dd60d257a
nginx-0.0.3-2004-05-10-23:53:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
319
diff
changeset
|
168 * is smaller than "postpone_output" directive |
|
142
cb77c084acdb
nginx-0.0.1-2003-10-09-11:00:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
119
diff
changeset
|
169 */ |
|
71
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
170 |
| 499 | 171 if (!last && !flush && in && size < (off_t) clcf->postpone_output) { |
|
4
c5f071d376e5
nginx-0.0.1-2002-08-22-19:24:03 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
172 return NGX_OK; |
|
41
59e7c7f30d49
nginx-0.0.1-2002-12-26-19:26:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
26
diff
changeset
|
173 } |
|
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
174 |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
175 if (c->write->delayed) { |
|
77
57c2e18d3572
nginx-0.0.1-2003-04-17-21:59:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
75
diff
changeset
|
176 return NGX_AGAIN; |
|
57c2e18d3572
nginx-0.0.1-2003-04-17-21:59:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
75
diff
changeset
|
177 } |
|
57c2e18d3572
nginx-0.0.1-2003-04-17-21:59:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
75
diff
changeset
|
178 |
|
399
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
396
diff
changeset
|
179 if (size == 0 && !c->buffered) { |
| 483 | 180 if (last) { |
| 509 | 181 r->out = NULL; |
| 483 | 182 return NGX_OK; |
| 183 } | |
| 461 | 184 |
| 499 | 185 if (flush) { |
| 501 | 186 do { |
| 509 | 187 r->out = r->out->next; |
| 501 | 188 } |
| 509 | 189 while (r->out); |
| 501 | 190 |
| 499 | 191 return NGX_OK; |
| 192 } | |
| 193 | |
| 483 | 194 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
| 195 "the http output chain is empty"); | |
| 461 | 196 |
| 483 | 197 ngx_debug_point(); |
| 198 | |
| 199 return NGX_ERROR; | |
|
143
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
142
diff
changeset
|
200 } |
|
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
142
diff
changeset
|
201 |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
202 sent = c->sent; |
|
361
446782c909b3
nginx-0.0.7-2004-06-20-23:54:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
356
diff
changeset
|
203 |
| 527 | 204 chain = c->send_chain(c, r->out, r->limit_rate); |
|
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
205 |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
206 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| 461 | 207 "http write filter %p", chain); |
|
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
208 |
| 527 | 209 if (r->limit_rate) { |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
210 sent = c->sent - sent; |
|
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
211 c->write->delayed = 1; |
|
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
362
diff
changeset
|
212 ngx_add_timer(r->connection->write, |
| 527 | 213 (ngx_msec_t) (sent * 1000 / r->limit_rate)); |
|
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
|
214 } |
|
361
446782c909b3
nginx-0.0.7-2004-06-20-23:54:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
356
diff
changeset
|
215 |
|
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
216 if (chain == NGX_CHAIN_ERROR) { |
| 527 | 217 c->closed = 1; |
|
4
c5f071d376e5
nginx-0.0.1-2002-08-22-19:24:03 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
218 return NGX_ERROR; |
|
41
59e7c7f30d49
nginx-0.0.1-2002-12-26-19:26:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
26
diff
changeset
|
219 } |
|
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
220 |
| 509 | 221 for (cl = r->out; cl && cl != chain; /* void */) { |
| 507 | 222 ln = cl; |
| 223 cl = cl->next; | |
| 224 ngx_free_chain(r->pool, ln); | |
| 225 } | |
| 226 | |
| 509 | 227 r->out = chain; |
|
399
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
396
diff
changeset
|
228 |
| 513 | 229 if (chain || c->buffered) { |
|
395
f8f0f1834266
nginx-0.0.7-2004-07-16-21:11:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
394
diff
changeset
|
230 return NGX_AGAIN; |
|
f8f0f1834266
nginx-0.0.7-2004-07-16-21:11:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
394
diff
changeset
|
231 } |
|
f8f0f1834266
nginx-0.0.7-2004-07-16-21:11:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
394
diff
changeset
|
232 |
|
399
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
396
diff
changeset
|
233 return NGX_OK; |
|
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
234 } |
|
9
6f58641241bb
nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents:
8
diff
changeset
|
235 |
|
6f58641241bb
nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents:
8
diff
changeset
|
236 |
| 501 | 237 static ngx_int_t |
| 238 ngx_http_write_filter_init(ngx_cycle_t *cycle) | |
|
71
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
239 { |
|
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
240 ngx_http_top_body_filter = ngx_http_write_filter; |
|
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
241 |
|
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
242 return NGX_OK; |
|
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
243 } |