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

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nginx 0.1.0 *) The first public version.
author Igor Sysoev <http://sysoev.ru>
date Mon, 04 Oct 2004 00:00:00 +0400
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children 45fe5b98a9de
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-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 u_char error_tail[] =
14 "<hr><center>" NGINX_VER "</center>" CRLF
15 "</body>" CRLF
16 "</html>" CRLF
17 ;
18
19
20 static u_char msie_stub[] =
21 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
22 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
23 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
24 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
25 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
26 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
27 ;
28
29
30 static char error_301_page[] =
31 "<html>" CRLF
32 "<head><title>301 Moved Permanently</title></head>" CRLF
33 "<body bgcolor=\"white\">" CRLF
34 "<center><h1>301 Moved Permanently</h1></center>" CRLF
35 ;
36
37
38 static char error_302_page[] =
39 "<html>" CRLF
40 "<head><title>302 Found</title></head>" CRLF
41 "<body bgcolor=\"white\">" CRLF
42 "<center><h1>302 Found</h1></center>" CRLF
43 ;
44
45
46 static char error_400_page[] =
47 "<html>" CRLF
48 "<head><title>400 Bad Request</title></head>" CRLF
49 "<body bgcolor=\"white\">" CRLF
50 "<center><h1>400 Bad Request</h1></center>" CRLF
51 ;
52
53
54 static char error_403_page[] =
55 "<html>" CRLF
56 "<head><title>403 Forbidden</title></head>" CRLF
57 "<body bgcolor=\"white\">" CRLF
58 "<center><h1>403 Forbidden</h1></center>" CRLF
59 ;
60
61
62 static char error_404_page[] =
63 "<html>" CRLF
64 "<head><title>404 Not Found</title></head>" CRLF
65 "<body bgcolor=\"white\">" CRLF
66 "<center><h1>404 Not Found</h1></center>" CRLF
67 ;
68
69
70 static char error_405_page[] =
71 "<html>" CRLF
72 "<head><title>405 Not Allowed</title></head>" CRLF
73 "<body bgcolor=\"white\">" CRLF
74 "<center><h1>405 Not Allowed</h1></center>" CRLF
75 ;
76
77
78 static char error_408_page[] =
79 "<html>" CRLF
80 "<head><title>408 Request Time-out</title></head>" CRLF
81 "<body bgcolor=\"white\">" CRLF
82 "<center><h1>408 Request Time-out</h1></center>" CRLF
83 ;
84
85
86 static char error_413_page[] =
87 "<html>" CRLF
88 "<head><title>413 Request Entity Too Large</title></head>" CRLF
89 "<body bgcolor=\"white\">" CRLF
90 "<center><h1>413 Request Entity Too Large</h1></center>" CRLF
91 ;
92
93
94 static char error_414_page[] =
95 "<html>" CRLF
96 "<head><title>414 Request-URI Too Large</title></head>" CRLF
97 "<body bgcolor=\"white\">" CRLF
98 "<center><h1>414 Request-URI Too Large</h1></center>" CRLF
99 ;
100
101
102 static char error_416_page[] =
103 "<html>" CRLF
104 "<head><title>416 Requested Range Not Satisfiable</title></head>" CRLF
105 "<body bgcolor=\"white\">" CRLF
106 "<center><h1>416 Requested Range Not Satisfiable</h1></center>" CRLF
107 ;
108
109
110 static char error_497_page[] =
111 "<html>" CRLF
112 "<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>"
113 CRLF
114 "<body bgcolor=\"white\">" CRLF
115 "<center><h1>400 Bad Request</h1></center>" CRLF
116 "<center>The plain HTTP request was sent to HTTPS port</center>" CRLF
117 ;
118
119
120 static char error_500_page[] =
121 "<html>" CRLF
122 "<head><title>500 Internal Server Error</title></head>" CRLF
123 "<body bgcolor=\"white\">" CRLF
124 "<center><h1>500 Internal Server Error</h1></center>" CRLF
125 ;
126
127
128 static char error_501_page[] =
129 "<html>" CRLF
130 "<head><title>501 Method Not Implemented</title></head>" CRLF
131 "<body bgcolor=\"white\">" CRLF
132 "<center><h1>500 Method Not Implemented</h1></center>" CRLF
133 ;
134
135
136 static char error_502_page[] =
137 "<html>" CRLF
138 "<head><title>502 Bad Gateway</title></head>" CRLF
139 "<body bgcolor=\"white\">" CRLF
140 "<center><h1>502 Bad Gateway</h1></center>" CRLF
141 ;
142
143
144 static char error_503_page[] =
145 "<html>" CRLF
146 "<head><title>503 Service Temporarily Unavailable</title></head>" CRLF
147 "<body bgcolor=\"white\">" CRLF
148 "<center><h1>503 Service Temporarily Unavailable</h1></center>" CRLF
149 ;
150
151
152 static char error_504_page[] =
153 "<html>" CRLF
154 "<head><title>504 Gateway Time-out</title></head>" CRLF
155 "<body bgcolor=\"white\">" CRLF
156 "<center><h1>504 Gateway Time-out</h1></center>" CRLF
157 ;
158
159
160 static ngx_str_t error_pages[] = {
161 /* ngx_null_string, */ /* 300 */
162 ngx_string(error_301_page),
163 ngx_string(error_302_page),
164 ngx_null_string, /* 303 */
165
166 ngx_string(error_400_page),
167 ngx_null_string, /* 401 */
168 ngx_null_string, /* 402 */
169 ngx_string(error_403_page),
170 ngx_string(error_404_page),
171 ngx_string(error_405_page),
172 ngx_null_string, /* 406 */
173 ngx_null_string, /* 407 */
174 ngx_string(error_408_page),
175 ngx_null_string, /* 409 */
176 ngx_null_string, /* 410 */
177 ngx_null_string, /* 411 */
178 ngx_null_string, /* 412 */
179 ngx_string(error_413_page),
180 ngx_string(error_414_page),
181 ngx_null_string, /* 415 */
182 ngx_string(error_416_page),
183
184 ngx_string(error_497_page), /* 497, http to https */
185 ngx_string(error_404_page), /* 498, invalid host name */
186 ngx_null_string, /* 499, client closed connection */
187
188 ngx_string(error_500_page),
189 ngx_string(error_501_page),
190 ngx_string(error_502_page),
191 ngx_string(error_503_page),
192 ngx_string(error_504_page)
193 };
194
195
196 ngx_int_t ngx_http_special_response_handler(ngx_http_request_t *r, int error)
197 {
198 ngx_int_t rc;
199 ngx_uint_t err, i, msie_padding;
200 ngx_buf_t *b;
201 ngx_chain_t *out, **ll, *cl;
202 ngx_http_err_page_t *err_page;
203 ngx_http_core_loc_conf_t *clcf;
204
205 rc = ngx_http_discard_body(r);
206
207 if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
208 error = NGX_HTTP_INTERNAL_SERVER_ERROR;
209 }
210
211 r->headers_out.status = error;
212
213 if (r->keepalive != 0) {
214 switch (error) {
215 case NGX_HTTP_BAD_REQUEST:
216 case NGX_HTTP_REQUEST_ENTITY_TOO_LARGE:
217 case NGX_HTTP_REQUEST_URI_TOO_LARGE:
218 case NGX_HTTP_TO_HTTPS:
219 case NGX_HTTP_INTERNAL_SERVER_ERROR:
220 r->keepalive = 0;
221 }
222 }
223
224 if (r->lingering_close == 1) {
225 switch (error) {
226 case NGX_HTTP_BAD_REQUEST:
227 case NGX_HTTP_TO_HTTPS:
228 r->lingering_close = 0;
229 }
230 }
231
232 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
233
234 if (r->err_ctx == NULL && clcf->error_pages) {
235 err_page = clcf->error_pages->elts;
236 for (i = 0; i < clcf->error_pages->nelts; i++) {
237 if (err_page[i].status == error) {
238 if (err_page[i].overwrite) {
239 r->err_status = err_page[i].overwrite;
240 } else {
241 r->err_status = error;
242 }
243 r->err_ctx = r->ctx;
244 return ngx_http_internal_redirect(r, &err_page[i].uri, NULL);
245 }
246 }
247 }
248
249 if (error < NGX_HTTP_BAD_REQUEST) {
250 /* 3XX */
251 err = error - NGX_HTTP_MOVED_PERMANENTLY;
252
253 } else if (error < NGX_HTTP_NGX_CODES) {
254 /* 4XX */
255 err = error - NGX_HTTP_BAD_REQUEST + 3;
256
257 } else {
258 /* 49X, 5XX */
259 err = error - NGX_HTTP_NGX_CODES + 3 + 17;
260
261 switch (error) {
262 case NGX_HTTP_TO_HTTPS:
263 r->headers_out.status = NGX_HTTP_BAD_REQUEST;
264 error = NGX_HTTP_BAD_REQUEST;
265 break;
266
267 case NGX_HTTP_INVALID_HOST:
268 r->headers_out.status = NGX_HTTP_NOT_FOUND;
269 error = NGX_HTTP_NOT_FOUND;
270 break;
271 }
272 }
273
274 msie_padding = 0;
275
276 if (error_pages[err].len) {
277 r->headers_out.content_length_n = error_pages[err].len
278 + sizeof(error_tail) - 1;
279
280 if (clcf->msie_padding
281 && r->headers_in.msie
282 && r->http_version >= NGX_HTTP_VERSION_10
283 && error >= NGX_HTTP_BAD_REQUEST
284 && error != NGX_HTTP_REQUEST_URI_TOO_LARGE)
285 {
286 r->headers_out.content_length_n += sizeof(msie_stub) - 1;
287 msie_padding = 1;
288 }
289
290 r->headers_out.content_type = ngx_list_push(&r->headers_out.headers);
291 if (r->headers_out.content_type == NULL) {
292 return NGX_ERROR;
293 }
294
295 r->headers_out.content_type->key.len = sizeof("Content-Type") - 1;
296 r->headers_out.content_type->key.data = (u_char *) "Content-Type";
297 r->headers_out.content_type->value.len = sizeof("text/html") - 1;
298 r->headers_out.content_type->value.data = (u_char *) "text/html";
299
300 } else {
301 r->headers_out.content_length_n = -1;
302 }
303
304 if (r->headers_out.content_length) {
305 r->headers_out.content_length->key.len = 0;
306 r->headers_out.content_length = NULL;
307 }
308
309 rc = ngx_http_send_header(r);
310
311 if (rc == NGX_ERROR || r->header_only) {
312 return rc;
313 }
314
315 if (error_pages[err].len == 0) {
316 return NGX_OK;
317 }
318
319 out = NULL;
320 ll = NULL;
321
322 if (!(b = ngx_calloc_buf(r->pool))) {
323 return NGX_ERROR;
324 }
325 b->memory = 1;
326 b->pos = error_pages[err].data;
327 b->last = error_pages[err].data + error_pages[err].len;
328
329 ngx_alloc_link_and_set_buf(cl, b, r->pool, NGX_ERROR);
330 ngx_chain_add_link(out, ll, cl);
331
332
333 if (!(b = ngx_calloc_buf(r->pool))) {
334 return NGX_ERROR;
335 }
336 b->memory = 1;
337 b->pos = error_tail;
338 b->last = error_tail + sizeof(error_tail) - 1;
339
340 ngx_alloc_link_and_set_buf(cl, b, r->pool, NGX_ERROR);
341 ngx_chain_add_link(out, ll, cl);
342
343 if (msie_padding) {
344 if (!(b = ngx_calloc_buf(r->pool))) {
345 return NGX_ERROR;
346 }
347 b->memory = 1;
348 b->pos = msie_stub;
349 b->last = msie_stub + sizeof(msie_stub) - 1;
350
351 ngx_alloc_link_and_set_buf(cl, b, r->pool, NGX_ERROR);
352 ngx_chain_add_link(out, ll, cl);
353 }
354
355 b->last_buf = 1;
356
357 return ngx_http_output_filter(r, out);
358 }