50
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
|
4 */
|
|
5
|
|
6
|
|
7 #include <ngx_config.h>
|
|
8 #include <ngx_core.h>
|
|
9 #include <ngx_event.h>
|
|
10 #include <ngx_http.h>
|
|
11
|
|
12
|
|
13 static ngx_int_t ngx_http_write_filter_init(ngx_cycle_t *cycle);
|
|
14
|
|
15
|
|
16 ngx_http_module_t ngx_http_write_filter_module_ctx = {
|
58
|
17 NULL, /* preconfiguration */
|
|
18 NULL, /* postconfiguration */
|
50
|
19
|
|
20 NULL, /* create main configuration */
|
|
21 NULL, /* init main configuration */
|
|
22
|
|
23 NULL, /* create server configuration */
|
|
24 NULL, /* merge server configuration */
|
|
25
|
|
26 NULL, /* create location configuration */
|
|
27 NULL, /* merge location configuration */
|
|
28 };
|
|
29
|
|
30
|
|
31 ngx_module_t ngx_http_write_filter_module = {
|
58
|
32 NGX_MODULE_V1,
|
50
|
33 &ngx_http_write_filter_module_ctx, /* module context */
|
|
34 NULL, /* module directives */
|
|
35 NGX_HTTP_MODULE, /* module type */
|
90
|
36 NULL, /* init master */
|
50
|
37 ngx_http_write_filter_init, /* init module */
|
90
|
38 NULL, /* init process */
|
|
39 NULL, /* init thread */
|
|
40 NULL, /* exit thread */
|
|
41 NULL, /* exit process */
|
|
42 NULL, /* exit master */
|
|
43 NGX_MODULE_V1_PADDING
|
50
|
44 };
|
|
45
|
|
46
|
|
47 ngx_int_t
|
|
48 ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
49 {
|
58
|
50 off_t size, sent;
|
|
51 ngx_uint_t last, flush;
|
|
52 ngx_chain_t *cl, *ln, **ll, *chain;
|
|
53 ngx_connection_t *c;
|
|
54 ngx_http_core_loc_conf_t *clcf;
|
50
|
55
|
76
|
56 c = r->connection;
|
|
57
|
|
58 if (c->closed) {
|
|
59 return NGX_ERROR;
|
|
60 }
|
|
61
|
50
|
62 size = 0;
|
|
63 flush = 0;
|
|
64 last = 0;
|
58
|
65 ll = &r->out;
|
50
|
66
|
|
67 /* find the size, the flush point and the last link of the saved chain */
|
|
68
|
58
|
69 for (cl = r->out; cl; cl = cl->next) {
|
50
|
70 ll = &cl->next;
|
|
71
|
|
72 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0,
|
|
73 "write old buf t:%d f:%d %p, pos %p, size: %z "
|
|
74 "file: %O, size: %z",
|
|
75 cl->buf->temporary, cl->buf->in_file,
|
|
76 cl->buf->start, cl->buf->pos,
|
|
77 cl->buf->last - cl->buf->pos,
|
|
78 cl->buf->file_pos,
|
|
79 cl->buf->file_last - cl->buf->file_pos);
|
|
80
|
|
81 #if 1
|
|
82 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) {
|
|
83 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
84 "zero size buf in writer "
|
|
85 "t:%d r:%d f:%d %p %p-%p %p %O-%O",
|
|
86 cl->buf->temporary,
|
|
87 cl->buf->recycled,
|
|
88 cl->buf->in_file,
|
|
89 cl->buf->start,
|
|
90 cl->buf->pos,
|
|
91 cl->buf->last,
|
|
92 cl->buf->file,
|
|
93 cl->buf->file_pos,
|
|
94 cl->buf->file_last);
|
|
95
|
|
96 ngx_debug_point();
|
|
97 return NGX_ERROR;
|
|
98 }
|
|
99 #endif
|
|
100
|
|
101 size += ngx_buf_size(cl->buf);
|
|
102
|
|
103 if (cl->buf->flush || cl->buf->recycled) {
|
|
104 flush = 1;
|
|
105 }
|
|
106
|
|
107 if (cl->buf->last_buf) {
|
|
108 last = 1;
|
|
109 }
|
|
110 }
|
|
111
|
|
112 /* add the new chain to the existent one */
|
|
113
|
|
114 for (ln = in; ln; ln = ln->next) {
|
|
115 cl = ngx_alloc_chain_link(r->pool);
|
|
116 if (cl == NULL) {
|
|
117 return NGX_ERROR;
|
|
118 }
|
|
119
|
|
120 cl->buf = ln->buf;
|
|
121 *ll = cl;
|
|
122 ll = &cl->next;
|
|
123
|
|
124 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0,
|
|
125 "write new buf t:%d f:%d %p, pos %p, size: %z "
|
|
126 "file: %O, size: %z",
|
|
127 cl->buf->temporary, cl->buf->in_file,
|
|
128 cl->buf->start, cl->buf->pos,
|
|
129 cl->buf->last - cl->buf->pos,
|
|
130 cl->buf->file_pos,
|
|
131 cl->buf->file_last - cl->buf->file_pos);
|
|
132
|
|
133 #if 1
|
|
134 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) {
|
|
135 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
136 "zero size buf in writer "
|
|
137 "t:%d r:%d f:%d %p %p-%p %p %O-%O",
|
|
138 cl->buf->temporary,
|
|
139 cl->buf->recycled,
|
|
140 cl->buf->in_file,
|
|
141 cl->buf->start,
|
|
142 cl->buf->pos,
|
|
143 cl->buf->last,
|
|
144 cl->buf->file,
|
|
145 cl->buf->file_pos,
|
|
146 cl->buf->file_last);
|
|
147
|
|
148 ngx_debug_point();
|
|
149 return NGX_ERROR;
|
|
150 }
|
|
151 #endif
|
|
152
|
|
153 size += ngx_buf_size(cl->buf);
|
|
154
|
|
155 if (cl->buf->flush || cl->buf->recycled) {
|
|
156 flush = 1;
|
|
157 }
|
|
158
|
|
159 if (cl->buf->last_buf) {
|
|
160 last = 1;
|
|
161 }
|
|
162 }
|
|
163
|
|
164 *ll = NULL;
|
|
165
|
|
166 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
167 "http write filter: l:%d f:%d s:%O", last, flush, size);
|
|
168
|
58
|
169 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
50
|
170
|
|
171 /*
|
58
|
172 * avoid the output if there are no last buf, no flush point,
|
50
|
173 * there are the incoming bufs and the size of all bufs
|
|
174 * is smaller than "postpone_output" directive
|
|
175 */
|
|
176
|
|
177 if (!last && !flush && in && size < (off_t) clcf->postpone_output) {
|
|
178 return NGX_OK;
|
|
179 }
|
|
180
|
|
181 if (c->write->delayed) {
|
|
182 return NGX_AGAIN;
|
|
183 }
|
|
184
|
|
185 if (size == 0 && !c->buffered) {
|
|
186 if (last) {
|
58
|
187 r->out = NULL;
|
50
|
188 return NGX_OK;
|
|
189 }
|
|
190
|
|
191 if (flush) {
|
|
192 do {
|
58
|
193 r->out = r->out->next;
|
50
|
194 }
|
58
|
195 while (r->out);
|
50
|
196
|
|
197 return NGX_OK;
|
|
198 }
|
|
199
|
|
200 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
201 "the http output chain is empty");
|
|
202
|
|
203 ngx_debug_point();
|
|
204
|
|
205 return NGX_ERROR;
|
|
206 }
|
|
207
|
|
208 sent = c->sent;
|
|
209
|
76
|
210 chain = c->send_chain(c, r->out, r->limit_rate);
|
50
|
211
|
|
212 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
213 "http write filter %p", chain);
|
|
214
|
76
|
215 if (r->limit_rate) {
|
50
|
216 sent = c->sent - sent;
|
|
217 c->write->delayed = 1;
|
|
218 ngx_add_timer(r->connection->write,
|
76
|
219 (ngx_msec_t) (sent * 1000 / r->limit_rate));
|
50
|
220 }
|
|
221
|
|
222 if (chain == NGX_CHAIN_ERROR) {
|
76
|
223 c->closed = 1;
|
50
|
224 return NGX_ERROR;
|
|
225 }
|
|
226
|
58
|
227 for (cl = r->out; cl && cl != chain; /* void */) {
|
56
|
228 ln = cl;
|
|
229 cl = cl->next;
|
|
230 ngx_free_chain(r->pool, ln);
|
|
231 }
|
|
232
|
58
|
233 r->out = chain;
|
50
|
234
|
90
|
235 if (chain || (c->buffered && r->postponed == NULL)) {
|
50
|
236 return NGX_AGAIN;
|
|
237 }
|
|
238
|
|
239 return NGX_OK;
|
|
240 }
|
|
241
|
|
242
|
|
243 static ngx_int_t
|
|
244 ngx_http_write_filter_init(ngx_cycle_t *cycle)
|
|
245 {
|
|
246 ngx_http_top_body_filter = ngx_http_write_filter;
|
|
247
|
|
248 return NGX_OK;
|
|
249 }
|