add support for smartcards in charon by using the ENGINE API provided by OpenSSL...
[strongswan.git] / src / libfast / request.c
1 /*
2 * Copyright (C) 2007 Martin Willi
3 * Hochschule fuer Technik Rapperswil
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 *
15 * $Id$
16 */
17
18 #define _GNU_SOURCE
19
20 #include "request.h"
21
22 #include <library.h>
23 #include <debug.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <pthread.h>
27 #include <ClearSilver/ClearSilver.h>
28
29 typedef struct private_request_t private_request_t;
30
31 /**
32 * private data of the task manager
33 */
34 struct private_request_t {
35
36 /**
37 * public functions
38 */
39 request_t public;
40
41 /**
42 * FastCGI request object
43 */
44 FCGX_Request req;
45
46 /**
47 * length of the req.envp array
48 */
49 int req_env_len;
50
51 /**
52 * ClearSilver CGI Kit context
53 */
54 CGI *cgi;
55
56 /**
57 * ClearSilver HDF dataset for this request
58 */
59 HDF *hdf;
60
61 /**
62 * close the session?
63 */
64 bool closed;
65
66 /**
67 * reference count
68 */
69 refcount_t ref;
70 };
71
72 /**
73 * key to a the threads "this" request, used for ClearSilver cgiwrap callbacks.
74 * ClearSilver cgiwrap is not threadsave, so we use a private
75 * context for each thread.
76 */
77 static pthread_key_t this_key;
78
79 /**
80 * control variable for pthread_once
81 */
82 pthread_once_t once = PTHREAD_ONCE_INIT;
83
84 /**
85 * fcgiwrap read callback
86 */
87 static int read_cb(void *null, char *buf, int size)
88 {
89 private_request_t *this = (private_request_t*)pthread_getspecific(this_key);
90
91 return FCGX_GetStr(buf, size, this->req.in);
92 }
93
94 /**
95 * fcgiwrap writef callback
96 */
97 static int writef_cb(void *null, const char *format, va_list args)
98 {
99 private_request_t *this = (private_request_t*)pthread_getspecific(this_key);
100
101 FCGX_VFPrintF(this->req.out, format, args);
102 return 0;
103 }
104 /**
105 * fcgiwrap write callback
106 */
107 static int write_cb(void *null, const char *buf, int size)
108 {
109 private_request_t *this = (private_request_t*)pthread_getspecific(this_key);
110
111 return FCGX_PutStr(buf, size, this->req.out);
112 }
113
114 /**
115 * fcgiwrap getenv callback
116 */
117 static char *getenv_cb(void *null, const char *key)
118 {
119 char *value;
120 private_request_t *this = (private_request_t*)pthread_getspecific(this_key);
121
122 value = FCGX_GetParam(key, this->req.envp);
123 return value ? strdup(value) : NULL;
124 }
125
126 /**
127 * fcgiwrap getenv callback
128 */
129 static int putenv_cb(void *null, const char *key, const char *value)
130 {
131 /* not supported */
132 return 1;
133 }
134
135 /**
136 * fcgiwrap iterenv callback
137 */
138 static int iterenv_cb(void *null, int num, char **key, char **value)
139 {
140 *key = NULL;
141 *value = NULL;
142 private_request_t *this = (private_request_t*)pthread_getspecific(this_key);
143 if (num < this->req_env_len)
144 {
145 char *eq;
146
147 eq = strchr(this->req.envp[num], '=');
148 if (eq)
149 {
150 *key = strndup(this->req.envp[num], eq - this->req.envp[num]);
151 *value = strdup(eq + 1);
152 }
153 if (*key == NULL || *value == NULL)
154 {
155 free(*key);
156 free(*value);
157 return 1;
158 }
159 }
160 return 0;
161 }
162
163 /**
164 * Implementation of request_t.get_cookie.
165 */
166 static char* get_cookie(private_request_t *this, char *name)
167 {
168 return hdf_get_valuef(this->hdf, "Cookie.%s", name);
169 }
170
171 /**
172 * Implementation of request_t.get_path.
173 */
174 static char* get_path(private_request_t *this)
175 {
176 char * path = FCGX_GetParam("PATH_INFO", this->req.envp);
177 return path ? path : "";
178 }
179
180 /**
181 * Implementation of request_t.get_host.
182 */
183 static char* get_host(private_request_t *this)
184 {
185 char *addr = FCGX_GetParam("REMOTE_ADDR", this->req.envp);
186 return addr ? addr : "";
187 }
188
189 /**
190 * Implementation of request_t.get_user_agent.
191 */
192 static char* get_user_agent(private_request_t *this)
193 {
194 char *agent = FCGX_GetParam("HTTP_USER_AGENT", this->req.envp);
195 return agent ? agent : "";
196 }
197
198 /**
199 * Implementation of request_t.get_post_data.
200 */
201 static char* get_query_data(private_request_t *this, char *name)
202 {
203 return hdf_get_valuef(this->hdf, "Query.%s", name);
204 }
205
206 /**
207 * Implementation of request_t.add_cookie.
208 */
209 static void add_cookie(private_request_t *this, char *name, char *value)
210 {
211 pthread_setspecific(this_key, this);
212 cgi_cookie_set (this->cgi, name, value,
213 FCGX_GetParam("SCRIPT_NAME", this->req.envp),
214 NULL, NULL, 0, 0);
215 }
216
217 /**
218 * Implementation of request_t.redirect.
219 */
220 static void redirect(private_request_t *this, char *fmt, ...)
221 {
222 va_list args;
223
224 FCGX_FPrintF(this->req.out, "Status: 303 See Other\n");
225 FCGX_FPrintF(this->req.out, "Location: %s%s",
226 FCGX_GetParam("SCRIPT_NAME", this->req.envp),
227 *fmt == '/' ? "" : "/");
228 va_start(args, fmt);
229 FCGX_VFPrintF(this->req.out, fmt, args);
230 va_end(args);
231 FCGX_FPrintF(this->req.out, "\n\n");
232 }
233
234 /**
235 * Implementation of request_t.to_referer.
236 */
237 static void to_referer(private_request_t *this)
238 {
239 FCGX_FPrintF(this->req.out, "Status: 303 See Other\n");
240 FCGX_FPrintF(this->req.out, "Location: %s\n\n",
241 FCGX_GetParam("HTTP_REFERER", this->req.envp));
242 }
243
244 /**
245 * Implementation of request_t.get_base.
246 */
247 static char* get_base(private_request_t *this)
248 {
249 return FCGX_GetParam("SCRIPT_NAME", this->req.envp);
250 }
251
252 /**
253 * Implementation of request_t.session_closed.
254 */
255 static bool session_closed(private_request_t *this)
256 {
257 return this->closed;
258 }
259
260 /**
261 * Implementation of request_t.close_session.
262 */
263 static void close_session(private_request_t *this)
264 {
265 this->closed = TRUE;
266 }
267
268 /**
269 * Implementation of request_t.serve.
270 */
271 static void serve(private_request_t *this, char *headers, chunk_t chunk)
272 {
273 FCGX_FPrintF(this->req.out, "%s\n\n", headers);
274
275 FCGX_PutStr(chunk.ptr, chunk.len, this->req.out);
276 }
277
278 /**
279 * Implementation of request_t.render.
280 */
281 static void render(private_request_t *this, char *template)
282 {
283 NEOERR* err;
284
285 pthread_setspecific(this_key, this);
286 err = cgi_display(this->cgi, template);
287 if (err)
288 {
289 cgi_neo_error(this->cgi, err);
290 nerr_log_error(err);
291 }
292 return;
293 }
294
295 /**
296 * Implementation of request_t.streamf.
297 */
298 static int streamf(private_request_t *this, char *format, ...)
299 {
300 va_list args;
301 int written;
302
303 va_start(args, format);
304 written = FCGX_VFPrintF(this->req.out, format, args);
305 va_end(args);
306 if (written >= 0 &&
307 FCGX_FFlush(this->req.out) == -1)
308 {
309 return -1;
310 }
311 return written;
312 }
313
314 /**
315 * Implementation of request_t.set.
316 */
317 static void set(private_request_t *this, char *key, char *value)
318 {
319 hdf_set_value(this->hdf, key, value);
320 }
321
322 /**
323 * Implementation of request_t.setf.
324 */
325 static void setf(private_request_t *this, char *format, ...)
326 {
327 va_list args;
328
329 va_start(args, format);
330 hdf_set_valuevf(this->hdf, format, args);
331 va_end(args);
332 }
333
334 /**
335 * Implementation of request_t.get_ref.
336 */
337 static request_t* get_ref(private_request_t *this)
338 {
339 ref_get(&this->ref);
340 return &this->public;
341 }
342
343 /**
344 * Implementation of request_t.destroy
345 */
346 static void destroy(private_request_t *this)
347 {
348 if (ref_put(&this->ref))
349 {
350 pthread_setspecific(this_key, this);
351 cgi_destroy(&this->cgi);
352 FCGX_Finish_r(&this->req);
353 free(this);
354 }
355 }
356
357 /**
358 * This initialization method is guaranteed to run only once
359 * for all threads.
360 */
361 static void init(void)
362 {
363 cgiwrap_init_emu(NULL, read_cb, writef_cb, write_cb,
364 getenv_cb, putenv_cb, iterenv_cb);
365 pthread_key_create(&this_key, NULL);
366 }
367
368 /*
369 * see header file
370 */
371 request_t *request_create(int fd, bool debug)
372 {
373 NEOERR* err;
374 private_request_t *this = malloc_thing(private_request_t);
375 bool failed = FALSE;
376
377 pthread_cleanup_push(free, this);
378 if (FCGX_InitRequest(&this->req, fd, 0) != 0 ||
379 FCGX_Accept_r(&this->req) != 0)
380 {
381 failed = TRUE;
382 }
383 pthread_cleanup_pop(failed);
384 if (failed)
385 {
386 return NULL;
387 }
388
389 this->public.get_path = (char*(*)(request_t*))get_path;
390 this->public.get_base = (char*(*)(request_t*))get_base;
391 this->public.get_host = (char*(*)(request_t*))get_host;
392 this->public.get_user_agent = (char*(*)(request_t*))get_user_agent;
393 this->public.add_cookie = (void(*)(request_t*, char *name, char *value))add_cookie;
394 this->public.get_cookie = (char*(*)(request_t*,char*))get_cookie;
395 this->public.get_query_data = (char*(*)(request_t*, char *name))get_query_data;
396 this->public.session_closed = (bool(*)(request_t*))session_closed;
397 this->public.close_session = (void(*)(request_t*))close_session;
398 this->public.redirect = (void(*)(request_t*, char *fmt,...))redirect;
399 this->public.to_referer = (void(*)(request_t*))to_referer;
400 this->public.render = (void(*)(request_t*,char*))render;
401 this->public.streamf = (int(*)(request_t*, char *format, ...))streamf;
402 this->public.serve = (void(*)(request_t*,char*,chunk_t))serve;
403 this->public.set = (void(*)(request_t*, char *, char*))set;
404 this->public.setf = (void(*)(request_t*, char *format, ...))setf;
405 this->public.get_ref = (request_t*(*)(request_t*))get_ref;
406 this->public.destroy = (void(*)(request_t*))destroy;
407
408 pthread_once(&once, init);
409 pthread_setspecific(this_key, this);
410
411 this->ref = 1;
412 this->closed = FALSE;
413 this->req_env_len = 0;
414 while (this->req.envp[this->req_env_len] != NULL)
415 {
416 this->req_env_len++;
417 }
418
419 err = hdf_init(&this->hdf);
420 if (!err)
421 {
422 hdf_set_value(this->hdf, "base", get_base(this));
423 hdf_set_value(this->hdf, "Config.NoCache", "true");
424 if (!debug)
425 {
426 hdf_set_value(this->hdf, "Config.TimeFooter", "0");
427 hdf_set_value(this->hdf, "Config.CompressionEnabled", "1");
428 hdf_set_value(this->hdf, "Config.WhiteSpaceStrip", "2");
429 }
430
431 err = cgi_init(&this->cgi, this->hdf);
432 if (!err)
433 {
434 err = cgi_parse(this->cgi);
435 if (!err)
436 {
437 return &this->public;
438 }
439 cgi_destroy(&this->cgi);
440 }
441 }
442 nerr_log_error(err);
443 FCGX_Finish_r(&this->req);
444 free(this);
445 return NULL;
446 }
447