Mercurial > hg > nginx
annotate src/http/ngx_http_write_filter.c @ 394:e7a68e14ccd3
nginx-0.0.7-2004-07-16-10:33:35 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 16 Jul 2004 06:33:35 +0000 |
parents | 5659d773cfa8 |
children | f8f0f1834266 |
rev | line source |
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1 |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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4 #include <ngx_event.h> |
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5 #include <ngx_http.h> |
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7 |
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8 typedef struct { |
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9 ngx_chain_t *out; |
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10 } ngx_http_write_filter_ctx_t; |
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13 static ngx_int_t ngx_http_write_filter_init(ngx_cycle_t *cycle); |
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14 |
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16 ngx_http_module_t ngx_http_write_filter_module_ctx = { |
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17 NULL, /* pre conf */ |
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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_write_filter_module = { |
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31 NGX_MODULE, |
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32 &ngx_http_write_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_write_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 ngx_int_t ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in) |
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41 { |
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42 int last; |
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43 off_t size, flush, sent; |
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44 ngx_chain_t *cl, *ln, **ll, *chain; |
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45 ngx_http_core_srv_conf_t *cscf; |
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46 ngx_http_core_loc_conf_t *clcf; |
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47 ngx_http_write_filter_ctx_t *ctx; |
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48 |
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49 ctx = ngx_http_get_module_ctx(r->main ? r->main : r, |
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50 ngx_http_write_filter_module); |
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51 |
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52 if (ctx == NULL) { |
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53 ngx_http_create_ctx(r, ctx, ngx_http_write_filter_module, |
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54 sizeof(ngx_http_write_filter_ctx_t), NGX_ERROR); |
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55 } |
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56 |
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57 size = 0; |
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58 flush = 0; |
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59 last = 0; |
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60 ll = &ctx->out; |
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61 |
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62 /* find the size, the flush point and the last link of the saved chain */ |
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63 |
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64 for (cl = ctx->out; cl; cl = cl->next) { |
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65 ll = &cl->next; |
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66 |
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67 size += ngx_buf_size(cl->buf); |
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68 |
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69 if (cl->buf->flush || cl->buf->recycled) { |
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70 flush = size; |
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71 } |
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72 |
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73 if (cl->buf->last_buf) { |
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74 last = 1; |
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75 } |
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76 } |
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77 |
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78 /* add the new chain to the existent one */ |
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79 |
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80 for (ln = in; ln; ln = ln->next) { |
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81 ngx_alloc_link_and_set_buf(cl, ln->buf, r->pool, NGX_ERROR); |
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82 *ll = cl; |
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83 ll = &cl->next; |
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84 |
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85 size += ngx_buf_size(cl->buf); |
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86 |
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87 if (cl->buf->flush || cl->buf->recycled) { |
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88 flush = size; |
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89 } |
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90 |
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91 if (cl->buf->last_buf) { |
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92 last = 1; |
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93 } |
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94 } |
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95 |
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96 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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97 "http write filter: l:%d f:" OFF_T_FMT " s:" OFF_T_FMT, |
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98 last, flush, size); |
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99 |
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363
diff
changeset
|
100 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
|
101 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
|
102 |
142
cb77c084acdb
nginx-0.0.1-2003-10-09-11:00:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
119
diff
changeset
|
103 /* |
344
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
104 * 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
|
105 * 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
|
106 * 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
|
107 */ |
71
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
108 |
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
109 if (!last && flush == 0 && 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
|
110 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
|
111 } |
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
112 |
362
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
|
113 if (r->connection->write->delayed) { |
77
57c2e18d3572
nginx-0.0.1-2003-04-17-21:59:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
75
diff
changeset
|
114 return NGX_AGAIN; |
57c2e18d3572
nginx-0.0.1-2003-04-17-21:59:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
75
diff
changeset
|
115 } |
57c2e18d3572
nginx-0.0.1-2003-04-17-21:59:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
75
diff
changeset
|
116 |
143
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
142
diff
changeset
|
117 if (size == 0) { |
333
be40e9893a19
nginx-0.0.3-2004-05-11-20:16:13 import
Igor Sysoev <igor@sysoev.ru>
parents:
332
diff
changeset
|
118 if (!last) { |
be40e9893a19
nginx-0.0.3-2004-05-11-20:16:13 import
Igor Sysoev <igor@sysoev.ru>
parents:
332
diff
changeset
|
119 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
be40e9893a19
nginx-0.0.3-2004-05-11-20:16:13 import
Igor Sysoev <igor@sysoev.ru>
parents:
332
diff
changeset
|
120 "the http output chain is empty"); |
be40e9893a19
nginx-0.0.3-2004-05-11-20:16:13 import
Igor Sysoev <igor@sysoev.ru>
parents:
332
diff
changeset
|
121 } |
143
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
142
diff
changeset
|
122 return NGX_OK; |
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
142
diff
changeset
|
123 } |
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
142
diff
changeset
|
124 |
361
446782c909b3
nginx-0.0.7-2004-06-20-23:54:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
356
diff
changeset
|
125 sent = r->connection->sent; |
446782c909b3
nginx-0.0.7-2004-06-20-23:54:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
356
diff
changeset
|
126 |
394
e7a68e14ccd3
nginx-0.0.7-2004-07-16-10:33:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
127 cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); |
e7a68e14ccd3
nginx-0.0.7-2004-07-16-10:33:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
128 |
e7a68e14ccd3
nginx-0.0.7-2004-07-16-10:33:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
129 chain = cscf->send_chain(r->connection, ctx->out, |
e7a68e14ccd3
nginx-0.0.7-2004-07-16-10:33:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
130 clcf->limit_rate ? clcf->limit_rate: |
e7a68e14ccd3
nginx-0.0.7-2004-07-16-10:33:35 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
131 OFF_T_MAX_VALUE); |
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
132 |
257
70e1c7d2b83d
nginx-0.0.2-2004-02-11-20:08:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
211
diff
changeset
|
133 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
70e1c7d2b83d
nginx-0.0.2-2004-02-11-20:08:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
211
diff
changeset
|
134 "http write filter %X", chain); |
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
135 |
391
b670db10cbbd
nginx-0.0.7-2004-07-14-20:01:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
136 if (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
|
137 sent = r->connection->sent - sent; |
7650aea1816f
nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents:
361
diff
changeset
|
138 r->connection->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
|
139 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
|
140 (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
|
141 } |
361
446782c909b3
nginx-0.0.7-2004-06-20-23:54:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
356
diff
changeset
|
142 |
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
143 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
|
144 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
|
145 } |
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
146 |
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
147 ctx->out = chain; |
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
148 |
61
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
149 if (chain == NULL) { |
4f3e2abcc2c4
nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
59
diff
changeset
|
150 return NGX_OK; |
144
ef8c87afcfc5
nginx-0.0.1-2003-10-12-20:49:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
143
diff
changeset
|
151 } |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
4
diff
changeset
|
152 |
144
ef8c87afcfc5
nginx-0.0.1-2003-10-12-20:49:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
143
diff
changeset
|
153 return NGX_AGAIN; |
1
d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
154 } |
9
6f58641241bb
nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents:
8
diff
changeset
|
155 |
6f58641241bb
nginx-0.0.1-2002-09-07-14:14:25 import
Igor Sysoev <igor@sysoev.ru>
parents:
8
diff
changeset
|
156 |
356
2e3cbc1bbe3c
nginx-0.0.7-2004-06-16-19:32:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
344
diff
changeset
|
157 static ngx_int_t 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
|
158 { |
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
159 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
|
160 |
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
161 return NGX_OK; |
59229033ae93
nginx-0.0.1-2003-04-08-19:40:10 import
Igor Sysoev <igor@sysoev.ru>
parents:
69
diff
changeset
|
162 } |