Mercurial > hg > nginx
annotate src/http/ngx_http_write_filter_module.c @ 507:cd3117ad9aab release-0.1.28
nginx-0.1.28-RELEASE import
*) Bugfix: nginx hogs CPU while proxying the huge files.
*) Bugfix: nginx could not be built by gcc 4.0 on Linux.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Fri, 08 Apr 2005 15:18:55 +0000 |
| parents | d4ea69372b94 |
| children | 9b8c906f6e63 |
| 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 typedef struct { |
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14 ngx_chain_t *out; |
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15 } ngx_http_write_filter_ctx_t; |
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18 static ngx_int_t ngx_http_write_filter_init(ngx_cycle_t *cycle); |
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19 |
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21 ngx_http_module_t ngx_http_write_filter_module_ctx = { |
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22 NULL, /* pre conf */ |
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23 |
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24 NULL, /* create main configuration */ |
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25 NULL, /* init main configuration */ |
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27 NULL, /* create server configuration */ |
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28 NULL, /* merge server configuration */ |
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29 |
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30 NULL, /* create location configuration */ |
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31 NULL, /* merge location configuration */ |
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32 }; |
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33 |
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34 |
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35 ngx_module_t ngx_http_write_filter_module = { |
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36 NGX_MODULE, |
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37 &ngx_http_write_filter_module_ctx, /* module context */ |
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38 NULL, /* module directives */ |
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39 NGX_HTTP_MODULE, /* module type */ |
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40 ngx_http_write_filter_init, /* init module */ |
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41 NULL /* init process */ |
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42 }; |
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43 |
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44 |
| 501 | 45 ngx_int_t |
| 46 ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
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47 { |
| 499 | 48 off_t size, sent; |
| 49 ngx_uint_t last, flush; | |
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50 ngx_chain_t *cl, *ln, **ll, *chain; |
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51 ngx_connection_t *c; |
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52 ngx_http_core_loc_conf_t *clcf; |
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53 ngx_http_write_filter_ctx_t *ctx; |
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54 |
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55 ctx = ngx_http_get_module_ctx(r->main ? r->main : r, |
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56 ngx_http_write_filter_module); |
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57 |
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58 if (ctx == NULL) { |
| 501 | 59 |
| 60 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_write_filter_ctx_t)); | |
| 61 if (ctx == NULL) { | |
| 62 return NGX_ERROR; | |
| 63 } | |
| 64 | |
| 65 ngx_http_set_ctx(r, ctx, ngx_http_write_filter_module); | |
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66 } |
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67 |
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68 size = 0; |
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69 flush = 0; |
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70 last = 0; |
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71 ll = &ctx->out; |
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72 |
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73 /* find the size, the flush point and the last link of the saved chain */ |
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74 |
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75 for (cl = ctx->out; cl; cl = cl->next) { |
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76 ll = &cl->next; |
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77 |
| 479 | 78 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, |
| 79 "write old buf t:%d f:%d %p, pos %p, size: %z " | |
| 80 "file: %O, size: %z", | |
| 81 cl->buf->temporary, cl->buf->in_file, | |
| 82 cl->buf->start, cl->buf->pos, | |
| 83 cl->buf->last - cl->buf->pos, | |
| 84 cl->buf->file_pos, | |
| 85 cl->buf->file_last - cl->buf->file_pos); | |
| 86 | |
| 461 | 87 #if 1 |
| 88 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
| 479 | 89 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
| 483 | 90 "zero size buf in writer " |
| 91 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
| 92 cl->buf->temporary, | |
| 93 cl->buf->recycled, | |
| 94 cl->buf->in_file, | |
| 95 cl->buf->start, | |
| 96 cl->buf->pos, | |
| 97 cl->buf->last, | |
| 98 cl->buf->file, | |
| 99 cl->buf->file_pos, | |
| 100 cl->buf->file_last); | |
| 101 | |
| 461 | 102 ngx_debug_point(); |
| 489 | 103 return NGX_ERROR; |
| 461 | 104 } |
| 105 #endif | |
| 106 | |
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107 size += ngx_buf_size(cl->buf); |
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108 |
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109 if (cl->buf->flush || cl->buf->recycled) { |
| 499 | 110 flush = 1; |
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111 } |
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112 |
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113 if (cl->buf->last_buf) { |
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114 last = 1; |
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115 } |
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116 } |
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117 |
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118 /* add the new chain to the existent one */ |
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119 |
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120 for (ln = in; ln; ln = ln->next) { |
| 501 | 121 cl = ngx_alloc_chain_link(r->pool); |
| 122 if (cl == NULL) { | |
| 461 | 123 return NGX_ERROR; |
| 124 } | |
| 125 | |
| 126 cl->buf = ln->buf; | |
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127 *ll = cl; |
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128 ll = &cl->next; |
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129 |
| 479 | 130 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, |
| 131 "write new buf t:%d f:%d %p, pos %p, size: %z " | |
| 132 "file: %O, size: %z", | |
| 133 cl->buf->temporary, cl->buf->in_file, | |
| 134 cl->buf->start, cl->buf->pos, | |
| 135 cl->buf->last - cl->buf->pos, | |
| 136 cl->buf->file_pos, | |
| 137 cl->buf->file_last - cl->buf->file_pos); | |
| 138 | |
| 461 | 139 #if 1 |
| 140 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
| 479 | 141 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
| 483 | 142 "zero size buf in writer " |
| 143 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
| 144 cl->buf->temporary, | |
| 145 cl->buf->recycled, | |
| 146 cl->buf->in_file, | |
| 147 cl->buf->start, | |
| 148 cl->buf->pos, | |
| 149 cl->buf->last, | |
| 150 cl->buf->file, | |
| 151 cl->buf->file_pos, | |
| 152 cl->buf->file_last); | |
| 153 | |
| 461 | 154 ngx_debug_point(); |
| 489 | 155 return NGX_ERROR; |
| 461 | 156 } |
| 157 #endif | |
| 158 | |
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diff
changeset
|
159 size += ngx_buf_size(cl->buf); |
|
153
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
160 |
|
343
6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents:
333
diff
changeset
|
161 if (cl->buf->flush || cl->buf->recycled) { |
| 499 | 162 flush = 1; |
|
153
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
163 } |
|
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
164 |
|
343
6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents:
333
diff
changeset
|
165 if (cl->buf->last_buf) { |
|
153
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
166 last = 1; |
|
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
167 } |
|
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
168 } |
|
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
169 |
| 461 | 170 *ll = NULL; |
| 171 | |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
172 c = r->connection; |
|
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
173 |
|
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
174 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| 499 | 175 "http write filter: l:%d f:%d s:%O", last, flush, size); |
|
26
53cb81681040
nginx-0.0.1-2002-12-15-09:25:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
24
diff
changeset
|
176 |
|
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
177 clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, |
|
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
178 ngx_http_core_module); |
|
154
eac26585476e
nginx-0.0.1-2003-10-22-11:05:29 import
Igor Sysoev <igor@sysoev.ru>
parents:
153
diff
changeset
|
179 |
|
142
cb77c084acdb
nginx-0.0.1-2003-10-09-11:00:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
119
diff
changeset
|
180 /* |
|
344
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
181 * avoid the output if there is no last buf, no flush point, |
|
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
182 * 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
|
183 * 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
|
184 */ |
|
71
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
185 |
| 499 | 186 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
|
187 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
|
188 } |
|
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
189 |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
190 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
|
191 return NGX_AGAIN; |
|
57c2e18d3572
nginx-0.0.1-2003-04-17-21:59:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
75
diff
changeset
|
192 } |
|
57c2e18d3572
nginx-0.0.1-2003-04-17-21:59:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
75
diff
changeset
|
193 |
|
399
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
396
diff
changeset
|
194 if (size == 0 && !c->buffered) { |
| 483 | 195 if (last) { |
| 196 return NGX_OK; | |
| 197 } | |
| 461 | 198 |
| 499 | 199 if (flush) { |
| 501 | 200 do { |
| 201 ctx->out = ctx->out->next; | |
| 202 } | |
| 203 while (ctx->out); | |
| 204 | |
| 499 | 205 return NGX_OK; |
| 206 } | |
| 207 | |
| 483 | 208 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
| 209 "the http output chain is empty"); | |
| 461 | 210 |
| 483 | 211 ngx_debug_point(); |
| 212 | |
| 213 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
|
214 } |
|
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
142
diff
changeset
|
215 |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
216 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
|
217 |
| 473 | 218 chain = c->send_chain(c, ctx->out, clcf->limit_rate); |
|
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
219 |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
220 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| 461 | 221 "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
|
222 |
|
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
223 if (clcf->limit_rate) { |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
395
diff
changeset
|
224 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
|
225 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
|
226 ngx_add_timer(r->connection->write, |
|
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
227 (ngx_msec_t) (sent * 1000 / clcf->limit_rate)); |
|
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
|
228 } |
|
361
446782c909b3
nginx-0.0.7-2004-06-20-23:54:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
356
diff
changeset
|
229 |
|
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
230 if (chain == NGX_CHAIN_ERROR) { |
|
4
c5f071d376e5
nginx-0.0.1-2002-08-22-19:24:03 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
231 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
|
232 } |
|
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
233 |
| 507 | 234 for (cl = ctx->out; cl && cl != chain; /* void */) { |
| 235 ln = cl; | |
| 236 cl = cl->next; | |
| 237 ngx_free_chain(r->pool, ln); | |
| 238 } | |
| 239 | |
|
399
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
396
diff
changeset
|
240 ctx->out = chain; |
|
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
396
diff
changeset
|
241 |
| 483 | 242 if (chain || (last && c->buffered)) { |
|
395
f8f0f1834266
nginx-0.0.7-2004-07-16-21:11:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
394
diff
changeset
|
243 return NGX_AGAIN; |
|
f8f0f1834266
nginx-0.0.7-2004-07-16-21:11:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
394
diff
changeset
|
244 } |
|
f8f0f1834266
nginx-0.0.7-2004-07-16-21:11:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
394
diff
changeset
|
245 |
|
399
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
396
diff
changeset
|
246 return NGX_OK; |
|
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
247 } |
|
9
6f58641241bb
nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents:
8
diff
changeset
|
248 |
|
6f58641241bb
nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents:
8
diff
changeset
|
249 |
| 501 | 250 static ngx_int_t |
| 251 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
|
252 { |
|
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
253 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
|
254 |
|
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
255 return NGX_OK; |
|
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
256 } |