Mercurial > hg > nginx-vendor-0-6

comparison src/http/ngx_http_header_filter.c @ 0:f0b350454894 NGINX_0_1_0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx 0.1.0 *) The first public version.
author Igor Sysoev <http://sysoev.ru>
date Mon, 04 Oct 2004 00:00:00 +0400
parents
children cc9f381affaa
comparison
equal deleted inserted replaced
-1:000000000000 0:f0b350454894
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_http.h>
10 #include <nginx.h>
11
12
13 static ngx_int_t ngx_http_header_filter_init(ngx_cycle_t *cycle);
14 static ngx_int_t ngx_http_header_filter(ngx_http_request_t *r);
15
16
17 static ngx_http_module_t ngx_http_header_filter_module_ctx = {
18 NULL, /* pre conf */
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_header_filter_module = {
32 NGX_MODULE,
33 &ngx_http_header_filter_module_ctx, /* module context */
34 NULL, /* module directives */
35 NGX_HTTP_MODULE, /* module type */
36 ngx_http_header_filter_init, /* init module */
37 NULL /* init child */
38 };
39
40
41 static char server_string[] = "Server: " NGINX_VER CRLF;
42
43
44 static ngx_str_t http_codes[] = {
45
46 ngx_string("200 OK"),
47 ngx_null_string, /* "201 Created" */
48 ngx_null_string, /* "202 Accepted" */
49 ngx_null_string, /* "203 Non-Authoritative Information" */
50 ngx_null_string, /* "204 No Content" */
51 ngx_null_string, /* "205 Reset Content" */
52 ngx_string("206 Partial Content"),
53 ngx_null_string, /* "207 Multi-Status" */
54
55 #if 0
56 ngx_null_string, /* "300 Multiple Choices" */
57 #endif
58
59 ngx_string("301 Moved Permanently"),
60 #if 0
61 ngx_string("302 Moved Temporarily"),
62 #else
63 ngx_string("302 Found"),
64 #endif
65 ngx_null_string, /* "303 See Other" */
66 ngx_string("304 Not Modified"),
67
68 ngx_string("400 Bad Request"),
69 ngx_string("401 Unauthorized"),
70 ngx_null_string, /* "402 Payment Required" */
71 ngx_string("403 Forbidden"),
72 ngx_string("404 Not Found"),
73 ngx_string("405 Not Allowed"),
74 ngx_null_string, /* "406 Not Acceptable" */
75 ngx_null_string, /* "407 Proxy Authentication Required" */
76 ngx_string("408 Request Time-out"),
77 ngx_null_string, /* "409 Conflict" */
78 ngx_null_string, /* "410 Gone" */
79 ngx_string("411 Length Required"),
80 ngx_null_string, /* "412 Precondition Failed" */
81 ngx_string("413 Request Entity Too Large"),
82 ngx_null_string, /* "414 Request-URI Too Large" but we never send it
83 * because we treat such requests as the HTTP/0.9
84 * requests and send only a body without a header
85 */
86 ngx_null_string, /* "415 Unsupported Media Type" */
87 ngx_string("416 Requested Range Not Satisfiable"),
88
89 ngx_string("500 Internal Server Error"),
90 ngx_string("501 Method Not Implemented"),
91 ngx_string("502 Bad Gateway"),
92 ngx_string("503 Service Temporarily Unavailable"),
93 ngx_string("504 Gateway Time-out")
94 };
95
96
97 ngx_http_header_t ngx_http_headers_out[] = {
98 { ngx_string("Server"), offsetof(ngx_http_headers_out_t, server) },
99 { ngx_string("Date"), offsetof(ngx_http_headers_out_t, date) },
100 { ngx_string("Content-Type"),
101 offsetof(ngx_http_headers_out_t, content_type) },
102 { ngx_string("Content-Length"),
103 offsetof(ngx_http_headers_out_t, content_length) },
104 { ngx_string("Content-Encoding"),
105 offsetof(ngx_http_headers_out_t, content_encoding) },
106 { ngx_string("Location"), offsetof(ngx_http_headers_out_t, location) },
107 { ngx_string("Last-Modified"),
108 offsetof(ngx_http_headers_out_t, last_modified) },
109 { ngx_string("Accept-Ranges"),
110 offsetof(ngx_http_headers_out_t, accept_ranges) },
111 { ngx_string("Expires"), offsetof(ngx_http_headers_out_t, expires) },
112 { ngx_string("Cache-Control"),
113 offsetof(ngx_http_headers_out_t, cache_control) },
114 { ngx_string("ETag"), offsetof(ngx_http_headers_out_t, etag) },
115
116 { ngx_null_string, 0 }
117 };
118
119
120 static ngx_int_t ngx_http_header_filter(ngx_http_request_t *r)
121 {
122 u_char *p;
123 size_t len;
124 ngx_uint_t status, i;
125 ngx_buf_t *b;
126 ngx_chain_t *ln;
127 ngx_list_part_t *part;
128 ngx_table_elt_t *header;
129 ngx_http_core_loc_conf_t *clcf;
130
131 if (r->http_version < NGX_HTTP_VERSION_10) {
132 return NGX_OK;
133 }
134
135 if (r->method == NGX_HTTP_HEAD) {
136 r->header_only = 1;
137 }
138
139 if (r->headers_out.last_modified_time != -1) {
140 if (r->headers_out.status != NGX_HTTP_OK
141 && r->headers_out.status != NGX_HTTP_NOT_MODIFIED
142 && r->headers_out.status != NGX_HTTP_PARTIAL_CONTENT)
143 {
144 r->headers_out.last_modified_time = -1;
145 r->headers_out.last_modified = NULL;
146 }
147 }
148
149 /* 2 is for trailing "\r\n" and 2 is for "\r\n" in the end of header */
150 len = sizeof("HTTP/1.x ") - 1 + 2 + 2;
151
152 /* status line */
153 if (r->headers_out.status_line.len) {
154 len += r->headers_out.status_line.len;
155 #if (NGX_SUPPRESS_WARN)
156 status = NGX_INVALID_ARRAY_INDEX;
157 #endif
158
159 } else {
160
161 if (r->headers_out.status < NGX_HTTP_MOVED_PERMANENTLY) {
162 /* 2XX */
163 status = r->headers_out.status - NGX_HTTP_OK;
164
165 } else if (r->headers_out.status < NGX_HTTP_BAD_REQUEST) {
166 /* 3XX */
167 status = r->headers_out.status - NGX_HTTP_MOVED_PERMANENTLY + 8;
168
169 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) {
170 r->header_only = 1;
171 }
172
173 } else if (r->headers_out.status < NGX_HTTP_INTERNAL_SERVER_ERROR) {
174 /* 4XX */
175 status = r->headers_out.status - NGX_HTTP_BAD_REQUEST + 8 + 4;
176
177 } else {
178 /* 5XX */
179 status = r->headers_out.status
180 - NGX_HTTP_INTERNAL_SERVER_ERROR + 8 + 4 + 17;
181 }
182
183 len += http_codes[status].len;
184 }
185
186 if (r->headers_out.server && r->headers_out.server->key.len) {
187 len += r->headers_out.server->key.len
188 + r->headers_out.server->value.len + 2;
189 } else {
190 len += sizeof(server_string) - 1;
191 }
192
193 if (r->headers_out.date && r->headers_out.date->key.len) {
194 len += r->headers_out.date->key.len
195 + r->headers_out.date->value.len + 2;
196 } else {
197 len += sizeof("Date: Mon, 28 Sep 1970 06:00:00 GMT" CRLF) - 1;
198 }
199
200 if (r->headers_out.content_length == NULL) {
201 if (r->headers_out.content_length_n >= 0) {
202 len += sizeof("Content-Length: ") - 1 + NGX_OFF_T_LEN + 2;
203 }
204 }
205
206 if (r->headers_out.content_type && r->headers_out.content_type->value.len) {
207 r->headers_out.content_type->key.len = 0;
208 len += sizeof("Content-Type: ") - 1
209 + r->headers_out.content_type->value.len + 2;
210
211 if (r->headers_out.charset.len) {
212 len += sizeof("; charset=") - 1 + r->headers_out.charset.len;
213 }
214 }
215
216 if (r->headers_out.location
217 && r->headers_out.location->value.len
218 && r->headers_out.location->value.data[0] == '/')
219 {
220 r->headers_out.location->key.len = 0;
221 len += sizeof("Location: http://") - 1
222 + r->server_name->len + r->headers_out.location->value.len + 2;
223
224 if (r->port != 80) {
225 len += r->port_text->len;
226 }
227 }
228
229 if (r->headers_out.last_modified && r->headers_out.last_modified->key.len) {
230 len += r->headers_out.last_modified->key.len
231 + r->headers_out.last_modified->value.len + 2;
232
233 } else if (r->headers_out.last_modified_time != -1) {
234 len += sizeof("Last-Modified: Mon, 28 Sep 1970 06:00:00 GMT" CRLF) - 1;
235 }
236
237 if (r->chunked) {
238 len += sizeof("Transfer-Encoding: chunked" CRLF) - 1;
239 }
240
241 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
242
243 if (r->keepalive) {
244 len += sizeof("Connection: keep-alive" CRLF) - 1;
245
246 /*
247 * MSIE and Opera ignore the "Keep-Alive: timeout=<N>" header.
248 * MSIE keeps the connection alive for about 60-65 seconds.
249 * Opera keeps the connection alive very long.
250 * Mozilla keeps the connection alive for N plus about 1-10 seconds.
251 * Konqueror keeps the connection alive for about N seconds.
252 */
253
254 if (clcf->keepalive_header
255 && (r->headers_in.gecko || r->headers_in.konqueror))
256 {
257 len += sizeof("Keep-Alive: timeout=") - 1 + TIME_T_LEN + 2;
258 }
259
260 } else {
261 len += sizeof("Connection: closed" CRLF) - 1;
262 }
263
264 part = &r->headers_out.headers.part;
265 header = part->elts;
266
267 for (i = 0; /* void */; i++) {
268
269 if (i >= part->nelts) {
270 if (part->next == NULL) {
271 break;
272 }
273
274 part = part->next;
275 header = part->elts;
276 i = 0;
277 }
278
279 if (header[i].key.len == 0) {
280 continue;
281 }
282
283 /* 2 is for ": " and 2 is for "\r\n" */
284 len += header[i].key.len + 2 + header[i].value.len + 2;
285 }
286
287 if (!(b = ngx_create_temp_buf(r->pool, len))) {
288 return NGX_ERROR;
289 }
290
291 /* "HTTP/1.x " */
292 b->last = ngx_cpymem(b->last, "HTTP/1.1 ", sizeof("HTTP/1.x ") - 1);
293
294 /* status line */
295 if (r->headers_out.status_line.len) {
296 b->last = ngx_cpymem(b->last, r->headers_out.status_line.data,
297 r->headers_out.status_line.len);
298
299 } else {
300 b->last = ngx_cpymem(b->last, http_codes[status].data,
301 http_codes[status].len);
302 }
303 *(b->last++) = CR; *(b->last++) = LF;
304
305 if (!(r->headers_out.server && r->headers_out.server->key.len)) {
306 b->last = ngx_cpymem(b->last, server_string, sizeof(server_string) - 1);
307 }
308
309 if (!(r->headers_out.date && r->headers_out.date->key.len)) {
310 b->last = ngx_cpymem(b->last, "Date: ", sizeof("Date: ") - 1);
311 b->last = ngx_cpymem(b->last, ngx_cached_http_time.data,
312 ngx_cached_http_time.len);
313
314 *(b->last++) = CR; *(b->last++) = LF;
315 }
316
317 if (r->headers_out.content_length == NULL) {
318 if (r->headers_out.content_length_n >= 0) {
319 b->last += ngx_snprintf((char *) b->last,
320 sizeof("Content-Length: ") + NGX_OFF_T_LEN + 2,
321 "Content-Length: " OFF_T_FMT CRLF,
322 r->headers_out.content_length_n);
323 }
324 }
325
326 if (r->headers_out.content_type && r->headers_out.content_type->value.len) {
327 b->last = ngx_cpymem(b->last, "Content-Type: ",
328 sizeof("Content-Type: ") - 1);
329 p = b->last;
330 b->last = ngx_cpymem(b->last, r->headers_out.content_type->value.data,
331 r->headers_out.content_type->value.len);
332
333 if (r->headers_out.charset.len) {
334 b->last = ngx_cpymem(b->last, "; charset=",
335 sizeof("; charset=") - 1);
336 b->last = ngx_cpymem(b->last, r->headers_out.charset.data,
337 r->headers_out.charset.len);
338
339 r->headers_out.content_type->value.len = b->last - p;
340 r->headers_out.content_type->value.data = p;
341 }
342
343 *(b->last++) = CR; *(b->last++) = LF;
344 }
345
346 if (r->headers_out.location
347 && r->headers_out.location->value.len
348 && r->headers_out.location->value.data[0] == '/')
349 {
350 p = b->last + sizeof("Location: ") - 1;
351 b->last = ngx_cpymem(b->last, "Location: http://",
352 sizeof("Location: http://") - 1);
353 b->last = ngx_cpymem(b->last, r->server_name->data,
354 r->server_name->len);
355 if (r->port != 80) {
356 b->last = ngx_cpymem(b->last, r->port_text->data,
357 r->port_text->len);
358 }
359
360 b->last = ngx_cpymem(b->last, r->headers_out.location->value.data,
361 r->headers_out.location->value.len);
362
363 r->headers_out.location->value.len = b->last - p;
364 r->headers_out.location->value.data = p;
365
366 *(b->last++) = CR; *(b->last++) = LF;
367 }
368
369 if (!(r->headers_out.last_modified && r->headers_out.last_modified->key.len)
370 && r->headers_out.last_modified_time != -1)
371 {
372 b->last = ngx_cpymem(b->last, "Last-Modified: ",
373 sizeof("Last-Modified: ") - 1);
374 b->last += ngx_http_time(b->last, r->headers_out.last_modified_time);
375
376 *(b->last++) = CR; *(b->last++) = LF;
377 }
378
379 if (r->chunked) {
380 b->last = ngx_cpymem(b->last, "Transfer-Encoding: chunked" CRLF,
381 sizeof("Transfer-Encoding: chunked" CRLF) - 1);
382 }
383
384 if (r->keepalive) {
385 b->last = ngx_cpymem(b->last, "Connection: keep-alive" CRLF,
386 sizeof("Connection: keep-alive" CRLF) - 1);
387
388 if (clcf->keepalive_header
389 && (r->headers_in.gecko || r->headers_in.konqueror))
390 {
391 b->last += ngx_snprintf((char *) b->last,
392 sizeof("Keep-Alive: timeout=") + TIME_T_LEN + 2,
393 "Keep-Alive: timeout=" TIME_T_FMT CRLF,
394 clcf->keepalive_header);
395 }
396
397 } else {
398 b->last = ngx_cpymem(b->last, "Connection: close" CRLF,
399 sizeof("Connection: close" CRLF) - 1);
400 }
401
402 part = &r->headers_out.headers.part;
403 header = part->elts;
404
405 for (i = 0; /* void */; i++) {
406
407 if (i >= part->nelts) {
408 if (part->next == NULL) {
409 break;
410 }
411
412 part = part->next;
413 header = part->elts;
414 i = 0;
415 }
416
417 if (header[i].key.len == 0) {
418 continue;
419 }
420
421 b->last = ngx_cpymem(b->last, header[i].key.data, header[i].key.len);
422 *(b->last++) = ':' ; *(b->last++) = ' ' ;
423
424 b->last = ngx_cpymem(b->last, header[i].value.data,
425 header[i].value.len);
426 *(b->last++) = CR; *(b->last++) = LF;
427 }
428
429 #if (NGX_DEBUG)
430 *(b->last) = '\0';
431 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "%s\n", b->pos);
432 #endif
433
434 /* the end of HTTP header */
435 *(b->last++) = CR; *(b->last++) = LF;
436
437 r->header_size = b->last - b->pos;
438
439 if (r->header_only) {
440 b->last_buf = 1;
441 }
442
443 if (!(ln = ngx_alloc_chain_link(r->pool))) {
444 return NGX_ERROR;
445 }
446
447 ln->buf = b;
448 ln->next = NULL;
449
450 return ngx_http_write_filter(r, ln);
451 }
452
453
454 static ngx_int_t ngx_http_header_filter_init(ngx_cycle_t *cycle)
455 {
456 ngx_http_top_header_filter = ngx_http_header_filter;
457
458 return NGX_OK;
459 }