Mercurial > hg > nginx-quic
comparison src/http/modules/ngx_http_ssi_filter.c @ 14:f8a0d0f31a24
nginx-0.0.1-2002-09-17-21:49:32 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 17 Sep 2002 17:49:32 +0000 |
parents | |
children | cbb38b60495c |
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13:2aba961a1d34 | 14:f8a0d0f31a24 |
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1 | |
2 #include <ngx_config.h> | |
3 #include <ngx_core.h> | |
4 #include <ngx_hunk.h> | |
5 #include <ngx_event_write.h> | |
6 #include <ngx_http.h> | |
7 #include <ngx_http_config.h> | |
8 | |
9 | |
10 static ngx_command_t ngx_http_ssi_filter_commands[]; | |
11 | |
12 static void *ngx_http_ssi_filter_create_conf(ngx_pool_t *pool); | |
13 | |
14 ngx_http_module_t ngx_http_ssi_filter_module = { | |
15 NGX_HTTP_MODULE, | |
16 NULL, /* create server config */ | |
17 ngx_http_ssi_filter_create_conf, /* create location config */ | |
18 ngx_http_ssi_filter_commands, /* module directives */ | |
19 NULL, /* init module */ | |
20 NULL /* init output body filter */ | |
21 }; | |
22 | |
23 | |
24 static ngx_command_t ngx_http_ssi_filter_commands[] = { | |
25 | |
26 {"ssi", ngx_conf_set_size_slot, | |
27 offsetof(ngx_http_write_filter_conf_t, buffer_output), | |
28 NGX_HTTP_LOC_CONF, NGX_CONF_TAKE1, | |
29 "set write filter size to buffer output"}, | |
30 | |
31 {NULL} | |
32 | |
33 }; | |
34 | |
35 | |
36 int ngx_http_ssi_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
37 { | |
38 int last; | |
39 off_t size, flush; | |
40 ngx_chain_t *ch, **prev, *chain; | |
41 ngx_http_ssi_filter_ctx_t *ctx; | |
42 ngx_http_ssi_filter_conf_t *conf; | |
43 | |
44 ctx = (ngx_http_ssi_filter_ctx_t *) | |
45 ngx_get_module_ctx(r->main ? r->main : r, | |
46 ngx_http_ssi_filter_module); | |
47 if (ctx == NULL) { | |
48 ngx_http_create_ctx(r, ctx, | |
49 ngx_http_ssi_filter_module, | |
50 sizeof(ngx_http_ssi_filter_ctx_t)); | |
51 | |
52 ctx->state = &ssi_start; | |
53 } | |
54 | |
55 state = ctx->state; | |
56 | |
57 ch = in; | |
58 p = ch->hunk->pos.mem; | |
59 | |
60 for ( ;; ) { | |
61 | |
62 if (state == ssi_start_state) { | |
63 for (/* void */ ; p < ch->hunk->last.mem; p++) { | |
64 if (*p == '<') { | |
65 state = ssi_exclam_state; | |
66 saved_pos = p; | |
67 saved_chain = ch; | |
68 break; | |
69 } | |
70 } | |
71 } | |
72 | |
73 for (/* void */ ; | |
74 p < ch->hunk->last.mem && state > ssi_start_state; | |
75 p++) | |
76 { | |
77 | |
78 if (*p == '<') { | |
79 state = ssi_exclam_state; | |
80 saved_pos = p; | |
81 saved_chain = ch; | |
82 continue; | |
83 } | |
84 | |
85 switch (state) { | |
86 | |
87 case ssi_exclam_state: | |
88 if (*p == '!') { | |
89 state = ssi_dash1_state; | |
90 | |
91 else { | |
92 state = ssi_ssi_state; | |
93 saved_pos = NULL; | |
94 saved_chain = NULL; | |
95 } | |
96 | |
97 break; | |
98 | |
99 case ssi_dash1_state: | |
100 if (*p == '-') { | |
101 state = ssi_dash2_state; | |
102 | |
103 else { | |
104 state = ssi_ssi_state; | |
105 saved_pos = NULL; | |
106 saved_chain = NULL; | |
107 } | |
108 | |
109 break; | |
110 | |
111 case ssi_dash2_state: | |
112 if (*p == '-') { | |
113 state = ssi_sharp_state; | |
114 | |
115 else { | |
116 state = ssi_ssi_state; | |
117 saved_pos = NULL; | |
118 saved_chain = NULL; | |
119 } | |
120 | |
121 break; | |
122 | |
123 case ssi_sharp_state: | |
124 switch (*p) { | |
125 case '#': | |
126 state = ssi_command_state; | |
127 break; | |
128 | |
129 case ' ': | |
130 case '\t': | |
131 case CR: | |
132 case LF: | |
133 break; | |
134 | |
135 default: | |
136 state = ssi_ssi_state; | |
137 saved_pos = NULL; | |
138 saved_chain = NULL; | |
139 break; | |
140 } | |
141 | |
142 break; | |
143 } | |
144 } | |
145 | |
146 ch = ch->next; | |
147 if (ch == NULL) { | |
148 ctx->state = state; | |
149 break; | |
150 } | |
151 | |
152 p = ch->hunk->pos.mem; | |
153 } | |
154 | |
155 for (p = saved_pos, ch = saved_chain; | |
156 ch; | |
157 ch = ch->next, p = ch->hunk->pos.mem) | |
158 { | |
159 ngx_memcpy(saved_line, p, ch->hunk->last.mem - p); | |
160 saved_size += ch->hunk->last.mem - p; | |
161 if (ch->next == NULL) | |
162 break; | |
163 } | |
164 | |
165 | |
166 | |
167 | |
168 | |
169 | |
170 | |
171 | |
172 | |
173 | |
174 | |
175 | |
176 | |
177 | |
178 for (/* void */; in; in = in->next) { | |
179 | |
180 for (p = in->hunk->pos.mem; | |
181 in->hunk->pos.mem < in->hunk->last.mem; | |
182 p++) | |
183 { | |
184 switch (state) { | |
185 | |
186 case ssi_start_state: | |
187 if (*p == '<') { | |
188 state = ssi_exclam_state; | |
189 save_line = p; | |
190 } | |
191 break; | |
192 | |
193 case ssi_exclam_state: | |
194 } | |
195 } | |
196 } | |
197 | |
198 | |
199 | |
200 | |
201 | |
202 | |
203 | |
204 | |
205 | |
206 | |
207 | |
208 | |
209 | |
210 | |
211 | |
212 | |
213 | |
214 | |
215 | |
216 size = flush = 0; | |
217 last = 0; | |
218 prev = &ctx->out; | |
219 | |
220 /* find size, flush point and last link of saved chain */ | |
221 for (ch = ctx->out; ch; ch = ch->next) { | |
222 prev = &ch->next; | |
223 size += ch->hunk->last.file - ch->hunk->pos.file; | |
224 | |
225 ngx_log_debug(r->connection->log, "old chunk: %x " QX_FMT " " QD_FMT _ | |
226 ch->hunk->type _ ch->hunk->pos.file _ | |
227 ch->hunk->last.file - ch->hunk->pos.file); | |
228 | |
229 if (ch->hunk->type & NGX_HUNK_FLUSH|NGX_HUNK_RECYCLED) | |
230 flush = size; | |
231 | |
232 if (ch->hunk->type & NGX_HUNK_LAST) | |
233 last = 1; | |
234 } | |
235 | |
236 /* add new chain to existent one */ | |
237 for (/* void */; in; in = in->next) { | |
238 ngx_test_null(ch, ngx_palloc(r->pool, sizeof(ngx_chain_t)), NGX_ERROR); | |
239 | |
240 ch->hunk = in->hunk; | |
241 ch->next = NULL; | |
242 *prev = ch; | |
243 prev = &ch->next; | |
244 size += ch->hunk->last.file - ch->hunk->pos.file; | |
245 | |
246 ngx_log_debug(r->connection->log, "new chunk: %x " QX_FMT " " QD_FMT _ | |
247 ch->hunk->type _ ch->hunk->pos.file _ | |
248 ch->hunk->last.file - ch->hunk->pos.file); | |
249 | |
250 if (ch->hunk->type & NGX_HUNK_FLUSH|NGX_HUNK_RECYCLED) | |
251 flush = size; | |
252 | |
253 if (ch->hunk->type & NGX_HUNK_LAST) | |
254 last = 1; | |
255 } | |
256 | |
257 conf = (ngx_http_write_filter_conf_t *) | |
258 ngx_get_module_loc_conf(r->main ? r->main : r, | |
259 ngx_http_write_filter_module); | |
260 | |
261 if (!last && flush == 0 && size < conf->buffer_output) | |
262 return NGX_OK; | |
263 | |
264 chain = ngx_event_write(r->connection, ctx->out, flush); | |
265 if (chain == (ngx_chain_t *) -1) | |
266 return NGX_ERROR; | |
267 | |
268 ctx->out = chain; | |
269 | |
270 ngx_log_debug(r->connection->log, "write filter %x" _ chain); | |
271 | |
272 return (chain ? NGX_AGAIN : NGX_OK); | |
273 } | |
274 | |
275 | |
276 static void *ngx_http_ssi_filter_create_conf(ngx_pool_t *pool) | |
277 { | |
278 ngx_http_ssi_filter_conf_t *conf; | |
279 | |
280 ngx_test_null(conf, | |
281 ngx_palloc(pool, sizeof(ngx_http_ssi_filter_conf_t)), | |
282 NULL); | |
283 | |
284 conf->buffer_output = NGX_CONF_UNSET; | |
285 | |
286 return conf; | |
287 } |