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-rw-r--r--src/gns/gnunet-bcd.c675
1 files changed, 0 insertions, 675 deletions
diff --git a/src/gns/gnunet-bcd.c b/src/gns/gnunet-bcd.c
deleted file mode 100644
index 83efcfba5..000000000
--- a/src/gns/gnunet-bcd.c
+++ /dev/null
@@ -1,675 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2013 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
21/**
22 * @file gns/gnunet-bcd.c
23 * @author Christian Grothoff
24 * @brief HTTP server to create GNS business cards
25 */
26
27#include "platform.h"
28#include <microhttpd.h>
29#include "gnunet_util_lib.h"
30#include "gnunet_identity_service.h"
31#include "gnunet_mhd_compat.h"
32
33struct StaticResource
34{
35 /**
36 * Handle to file on disk.
37 */
38 struct GNUNET_DISK_FileHandle *handle;
39
40 /**
41 * Size in bytes of the file.
42 */
43 uint64_t size;
44
45 /**
46 * Cached response object to send to clients.
47 */
48 struct MHD_Response *response;
49};
50
51struct ParameterMap
52{
53 /**
54 * Name of the parameter from the request.
55 */
56 char *name;
57
58 /**
59 * Name of the definition in the TeX output.
60 */
61 char *definition;
62};
63
64/**
65 * Handle to the HTTP server as provided by libmicrohttpd
66 */
67static struct MHD_Daemon *httpd = NULL;
68
69/**
70 * Our primary task for the HTTPD.
71 */
72static struct GNUNET_SCHEDULER_Task *httpd_task = NULL;
73
74/**
75 * Index file resource (simple result).
76 */
77static struct StaticResource *index_simple = NULL;
78
79/**
80 * Index file resource (full result).
81 */
82static struct StaticResource *index_full = NULL;
83
84/**
85 * Error: invalid gns key.
86 */
87static struct StaticResource *key_error = NULL;
88
89/**
90 * Error: 404
91 */
92static struct StaticResource *notfound_error = NULL;
93
94/**
95 * Errors after receiving the form data.
96 */
97static struct StaticResource *internal_error = NULL;
98
99/**
100 * Other errors.
101 */
102static struct StaticResource *forbidden_error = NULL;
103
104/**
105 * Full path to the TeX template file (simple result)
106 */
107static char *tex_file_simple = NULL;
108
109/**
110 * Full path to the TeX template file (full result)
111 */
112static char *tex_file_full = NULL;
113
114/**
115 * Full path to the TeX template file (PNG result)
116 */
117static char *tex_file_png = NULL;
118
119/**
120 * Used as a sort of singleton to send exactly one 100 CONTINUE per request.
121 */
122static int continue_100 = 100;
123
124/**
125 * Map of names with TeX definitions, used during PDF generation.
126 */
127static const struct ParameterMap pmap[] = {
128 {"prefix", "prefix"},
129 {"name", "name"},
130 {"suffix", "suffix"},
131 {"street", "street"},
132 {"city", "city"},
133 {"phone", "phone"},
134 {"fax", "fax"},
135 {"email", "email"},
136 {"homepage", "homepage"},
137 {"org", "organization"},
138 {"department", "department"},
139 {"subdepartment", "subdepartment"},
140 {"jobtitle", "jobtitle"},
141 {NULL, NULL},
142};
143
144/**
145 * Port number.
146 */
147static uint16_t port = 8888;
148
149/**
150 * Task ran at shutdown to clean up everything.
151 *
152 * @param cls unused
153 */
154static void
155do_shutdown (void *cls)
156{
157 /* We cheat a bit here: the file descriptor is implicitly closed by MHD, so
158 calling `GNUNET_DISK_file_close' would generate a spurious warning message
159 in the log. Since that function does nothing but close the descriptor and
160 free the allocated memory, After destroying the response all that's left to
161 do is call `GNUNET_free'. */
162 if (NULL != index_simple)
163 {
164 MHD_destroy_response (index_simple->response);
165 GNUNET_free (index_simple->handle);
166 GNUNET_free (index_simple);
167 }
168 if (NULL != index_full)
169 {
170 MHD_destroy_response (index_full->response);
171 GNUNET_free (index_full->handle);
172 GNUNET_free (index_full);
173 }
174 if (NULL != key_error)
175 {
176 MHD_destroy_response (key_error->response);
177 GNUNET_free (key_error->handle);
178 GNUNET_free (key_error);
179 }
180 if (NULL != notfound_error)
181 {
182 MHD_destroy_response (notfound_error->response);
183 GNUNET_free (notfound_error->handle);
184 GNUNET_free (notfound_error);
185 }
186 if (NULL != internal_error)
187 {
188 MHD_destroy_response (internal_error->response);
189 GNUNET_free (internal_error->handle);
190 GNUNET_free (internal_error);
191 }
192 if (NULL != forbidden_error)
193 {
194 MHD_destroy_response (forbidden_error->response);
195 GNUNET_free (forbidden_error->handle);
196 GNUNET_free (forbidden_error);
197 }
198
199 if (NULL != httpd_task)
200 {
201 GNUNET_SCHEDULER_cancel (httpd_task);
202 }
203 if (NULL != httpd)
204 {
205 MHD_stop_daemon (httpd);
206 }
207}
208
209/**
210 * Called when the HTTP server has some pending operations.
211 *
212 * @param cls unused
213 */
214static void
215do_httpd (void *cls);
216
217/**
218 * Schedule a task to run MHD.
219 */
220static void
221run_httpd (void)
222{
223 fd_set rs;
224 fd_set ws;
225 fd_set es;
226
227 struct GNUNET_NETWORK_FDSet *grs = GNUNET_NETWORK_fdset_create ();
228 struct GNUNET_NETWORK_FDSet *gws = GNUNET_NETWORK_fdset_create ();
229 struct GNUNET_NETWORK_FDSet *ges = GNUNET_NETWORK_fdset_create ();
230
231 FD_ZERO (&rs);
232 FD_ZERO (&ws);
233 FD_ZERO (&es);
234
235 int max = -1;
236 GNUNET_assert (MHD_YES == MHD_get_fdset (httpd, &rs, &ws, &es, &max));
237
238 unsigned MHD_LONG_LONG timeout = 0;
239 struct GNUNET_TIME_Relative gtime = GNUNET_TIME_UNIT_FOREVER_REL;
240 if (MHD_YES == MHD_get_timeout (httpd, &timeout))
241 {
242 gtime = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
243 timeout);
244 }
245
246 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
247 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
248 GNUNET_NETWORK_fdset_copy_native (ges, &es, max + 1);
249
250 httpd_task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
251 gtime,
252 grs,
253 gws,
254 &do_httpd,
255 NULL);
256 GNUNET_NETWORK_fdset_destroy (grs);
257 GNUNET_NETWORK_fdset_destroy (gws);
258 GNUNET_NETWORK_fdset_destroy (ges);
259}
260
261/**
262 * Called when the HTTP server has some pending operations.
263 *
264 * @param cls unused
265 */
266static void
267do_httpd (void *cls)
268{
269 httpd_task = NULL;
270 MHD_run (httpd);
271 run_httpd ();
272}
273
274/**
275 * Send a response back to a connected client.
276 *
277 * @param cls unused
278 * @param connection the connection with the client
279 * @param url the requested address
280 * @param method the HTTP method used
281 * @param version the protocol version (including the "HTTP/" part)
282 * @param upload_data data sent with a POST request
283 * @param upload_data_size length in bytes of the POST data
284 * @param ptr used to pass data between request handling phases
285 * @return MHD_NO on error
286 */
287static MHD_RESULT
288create_response (void *cls,
289 struct MHD_Connection *connection,
290 const char *url,
291 const char *method,
292 const char *version,
293 const char *upload_data,
294 size_t *upload_data_size,
295 void **ptr)
296{
297 (void) cls;
298 (void) version;
299 (void) upload_data;
300 (void) upload_data_size;
301
302 bool isget = (0 == strcmp (method, MHD_HTTP_METHOD_GET));
303 bool ishead = (0 == strcmp (method, MHD_HTTP_METHOD_HEAD));
304
305 if (!isget && !ishead)
306 {
307 return MHD_queue_response (connection,
308 MHD_HTTP_NOT_IMPLEMENTED,
309 forbidden_error->response);
310 }
311
312 if (ishead)
313 {
314 /* Dedicated branch in case we want to provide a different result for some
315 reason (e.g. a non-web browser application using the web UI) */
316 return MHD_queue_response (connection,
317 MHD_HTTP_OK,
318 index_simple->response);
319 }
320
321 /* Send a 100 CONTINUE response to tell clients that the result of the
322 request might take some time */
323 if (NULL == *ptr)
324 {
325 *ptr = &continue_100;
326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending 100 CONTINUE\n");
327 return MHD_YES;
328 }
329
330 if (0 == strcmp ("/", url))
331 {
332 return MHD_queue_response (connection,
333 MHD_HTTP_OK,
334 index_simple->response);
335 }
336
337 if (0 == strcmp ("/full", url))
338 {
339 return MHD_queue_response (connection,
340 MHD_HTTP_OK,
341 index_full->response);
342 }
343
344 bool isfull = (0 == strcmp ("/submit/full", url));
345 bool issimple = (0 == strcmp ("/submit/simple", url));
346
347 if (!isfull && !issimple)
348 {
349 return MHD_queue_response (connection,
350 MHD_HTTP_NOT_FOUND,
351 notfound_error->response);
352 }
353
354 const char *gpgfp = MHD_lookup_connection_value (connection,
355 MHD_GET_ARGUMENT_KIND,
356 "gpgfingerprint");
357 const char *gnsnick = MHD_lookup_connection_value (connection,
358 MHD_GET_ARGUMENT_KIND,
359 "gnsnick");
360 const char *gnskey = MHD_lookup_connection_value (connection,
361 MHD_GET_ARGUMENT_KIND,
362 "gnskey");
363 const char *qrpng = MHD_lookup_connection_value (connection,
364 MHD_GET_ARGUMENT_KIND,
365 "gnspng");
366
367 struct GNUNET_IDENTITY_PublicKey pk;
368 if (NULL == gnskey
369 || GNUNET_OK != GNUNET_IDENTITY_public_key_from_string (gnskey, &pk))
370 {
371 return MHD_queue_response (connection,
372 MHD_HTTP_BAD_REQUEST,
373 key_error->response);
374 }
375
376 char *tmpd = GNUNET_DISK_mkdtemp (gnskey);
377 if (NULL == tmpd)
378 {
379 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "mktemp", gnskey);
380 return MHD_queue_response (connection,
381 MHD_HTTP_INTERNAL_SERVER_ERROR,
382 internal_error->response);
383 }
384
385 char *defpath = NULL;
386 GNUNET_asprintf (&defpath, "%s%s%s", tmpd, DIR_SEPARATOR_STR, "def.tex");
387
388 FILE *deffile = fopen (defpath, "w");
389 if (NULL == deffile)
390 {
391 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", defpath);
392 GNUNET_free (defpath);
393 GNUNET_DISK_directory_remove (tmpd);
394 GNUNET_free (tmpd);
395 return MHD_queue_response (connection,
396 MHD_HTTP_INTERNAL_SERVER_ERROR,
397 internal_error->response);
398 }
399
400 GNUNET_free (defpath);
401
402 for (size_t i=0; NULL!=pmap[i].name; ++i)
403 {
404 const char *value = MHD_lookup_connection_value (connection,
405 MHD_GET_ARGUMENT_KIND,
406 pmap[i].name);
407 fprintf (deffile,
408 "\\def\\%s{%s}\n",
409 pmap[i].definition,
410 (NULL == value) ? "" : value);
411 }
412
413 if (NULL != gpgfp)
414 {
415 size_t len = strlen (gpgfp);
416 char *line1 = GNUNET_strndup (gpgfp, len/2);
417 char *line2 = GNUNET_strdup (&gpgfp[len/2]);
418 fprintf (deffile,
419 "\\def\\gpglineone{%s}\n\\def\\gpglinetwo{%s}\n",
420 line1,
421 line2);
422 }
423
424 fprintf (deffile,
425 "\\def\\gns{%s/%s}\n",
426 gnskey,
427 (NULL == gnsnick) ? "" : gnsnick);
428
429 fclose (deffile);
430
431 char *command = NULL;
432 GNUNET_asprintf (&command,
433 "cd %s; cp %s gns-bcd.tex; "
434 "pdflatex %s gns-bcd.tex >/dev/null 2>&1",
435 tmpd,
436 (isfull) ? tex_file_full :
437 ((NULL == qrpng) ? tex_file_simple : tex_file_png),
438 (NULL == qrpng) ? "" : "-shell-escape");
439
440 int ret = system (command);
441
442 GNUNET_free (command);
443
444 if (WIFSIGNALED (ret) || 0 != WEXITSTATUS (ret))
445 {
446 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "system", command);
447 }
448
449 GNUNET_asprintf (&defpath,
450 "%s%s%s",
451 tmpd,
452 DIR_SEPARATOR_STR,
453 (NULL == qrpng) ? "gns-bcd.pdf" : "gns-bcd.png");
454
455 int pdf = open (defpath, O_RDONLY);
456 if (-1 == pdf)
457 {
458 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", defpath);
459 GNUNET_free (defpath);
460 GNUNET_DISK_directory_remove (tmpd);
461 GNUNET_free (tmpd);
462 return MHD_queue_response (connection,
463 MHD_HTTP_INTERNAL_SERVER_ERROR,
464 internal_error->response);
465 }
466
467 struct stat statret;
468 GNUNET_break (0 == stat (defpath, &statret));
469
470 GNUNET_free (defpath);
471
472 struct MHD_Response *pdfrs =
473 MHD_create_response_from_fd ((size_t) statret.st_size, pdf);
474 if (NULL == pdfrs)
475 {
476 GNUNET_break (0);
477 GNUNET_break (0 == close (pdf));
478 GNUNET_DISK_directory_remove (tmpd);
479 GNUNET_free (tmpd);
480 return MHD_queue_response (connection,
481 MHD_HTTP_INTERNAL_SERVER_ERROR,
482 internal_error->response);
483 }
484
485 MHD_add_response_header (pdfrs,
486 MHD_HTTP_HEADER_CONTENT_TYPE,
487 (NULL == qrpng) ? "application/pdf" : "image/png");
488 MHD_add_response_header (pdfrs,
489 MHD_HTTP_HEADER_CONTENT_DISPOSITION,
490 (NULL == qrpng) ?
491 "attachment; filename=\"gns-business-card.pdf\"" :
492 "attachment; filename=\"gns-qr-code.png\"");
493 MHD_RESULT r = MHD_queue_response (connection, MHD_HTTP_OK, pdfrs);
494
495 MHD_destroy_response (pdfrs);
496 GNUNET_DISK_directory_remove (tmpd);
497 GNUNET_free (tmpd);
498
499 return r;
500}
501
502/**
503 * Open a file on disk and generate a response for it.
504 *
505 * @param name name of the file to open
506 * @param basedir directory where the file is located
507 * @return NULL on error
508 */
509static struct StaticResource *
510open_static_resource (const char *name, const char *basedir)
511{
512 char *fullname = NULL;
513 GNUNET_asprintf (&fullname, "%s%s%s", basedir, DIR_SEPARATOR_STR, name);
514
515 struct GNUNET_DISK_FileHandle *f =
516 GNUNET_DISK_file_open (fullname,
517 GNUNET_DISK_OPEN_READ,
518 GNUNET_DISK_PERM_NONE);
519
520 GNUNET_free (fullname);
521
522 if (NULL == f)
523 {
524 return NULL;
525 }
526
527 off_t size = 0;
528 if (GNUNET_SYSERR == GNUNET_DISK_file_handle_size (f, &size))
529 {
530 GNUNET_DISK_file_close (f);
531 return NULL;
532 }
533
534 struct MHD_Response *response = MHD_create_response_from_fd64 (size, f->fd);
535
536 if (NULL == response)
537 {
538 GNUNET_DISK_file_close (f);
539 return NULL;
540 }
541
542 struct StaticResource *res = GNUNET_new (struct StaticResource);
543 res->handle = f;
544 res->size = (uint64_t) size;
545 res->response = response;
546
547 return res;
548}
549
550/**
551 * Main function that will be run.
552 *
553 * @param cls closure
554 * @param args remaining command-line arguments
555 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
556 * @param c configuration
557 */
558static void
559run (void *cls,
560 char *const *args,
561 const char *cfgfile,
562 const struct GNUNET_CONFIGURATION_Handle *c)
563{
564 (void) cls;
565 (void) args;
566 (void) cfgfile;
567
568 if (0 == port)
569 {
570 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
571 _ ("Invalid port number %u\n"),
572 port);
573 GNUNET_SCHEDULER_shutdown ();
574 return;
575 }
576
577 GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);
578
579 char *datadir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_DATADIR);
580 GNUNET_assert (NULL != datadir);
581
582 GNUNET_asprintf (&tex_file_full,
583 "%s%s%s",
584 datadir,
585 DIR_SEPARATOR_STR,
586 "gns-bcd.tex");
587 GNUNET_asprintf (&tex_file_simple,
588 "%s%s%s",
589 datadir,
590 DIR_SEPARATOR_STR,
591 "gns-bcd-simple.tex");
592 GNUNET_asprintf(&tex_file_png,
593 "%s%s%s",
594 datadir,
595 DIR_SEPARATOR_STR,
596 "gns-bcd-png.tex");
597
598 index_simple = open_static_resource ("gns-bcd-simple.html", datadir);
599 index_full = open_static_resource ("gns-bcd.html", datadir);
600 key_error = open_static_resource ("gns-bcd-invalid-key.html", datadir);
601 notfound_error = open_static_resource ("gns-bcd-not-found.html", datadir);
602 internal_error = open_static_resource ("gns-bcd-internal-error.html", datadir);
603 forbidden_error = open_static_resource ("gns-bcd-forbidden.html", datadir);
604
605 GNUNET_free (datadir);
606
607 if ((NULL == index_simple) || (NULL == index_full)
608 || (NULL == key_error) || (NULL == notfound_error)
609 || (NULL == internal_error) || (NULL == forbidden_error))
610 {
611 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
612 _ ("Unable to set up the daemon\n"));
613 GNUNET_SCHEDULER_shutdown ();
614 return;
615 }
616
617 int flags = MHD_USE_DUAL_STACK | MHD_USE_DEBUG | MHD_ALLOW_SUSPEND_RESUME;
618 do
619 {
620 httpd = MHD_start_daemon (flags,
621 port,
622 NULL, NULL,
623 &create_response, NULL,
624 MHD_OPTION_CONNECTION_LIMIT, 512,
625 MHD_OPTION_PER_IP_CONNECTION_LIMIT, 2,
626 MHD_OPTION_CONNECTION_TIMEOUT, 60,
627 MHD_OPTION_CONNECTION_MEMORY_LIMIT, 16 * 1024,
628 MHD_OPTION_END);
629 flags = MHD_USE_DEBUG;
630 } while (NULL == httpd && flags != MHD_USE_DEBUG);
631
632 if (NULL == httpd)
633 {
634 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
635 _ ("Failed to start HTTP server\n"));
636 GNUNET_SCHEDULER_shutdown ();
637 return;
638 }
639
640 run_httpd ();
641}
642
643/**
644 * The main function for gnunet-gns.
645 *
646 * @param argc number of arguments from the command line
647 * @param argv command line arguments
648 * @return 0 ok, 1 on error
649 */
650int
651main (int argc, char *const *argv)
652{
653 struct GNUNET_GETOPT_CommandLineOption options[] = {
654 GNUNET_GETOPT_option_uint16 (
655 'p',
656 "port",
657 "PORT",
658 gettext_noop ("Run HTTP server on port PORT (default is 8888)"),
659 &port),
660 GNUNET_GETOPT_OPTION_END,
661 };
662
663 return ((GNUNET_OK ==
664 GNUNET_PROGRAM_run (argc,
665 argv,
666 "gnunet-bcd",
667 _ ("GNUnet HTTP server to create business cards"),
668 options,
669 &run,
670 NULL))
671 ? 0
672 : 1);
673}
674
675/* end of gnunet-bcd.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-26 12:43:41 +0000