1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
|
#include <sqlite3.h>
#include <microhttpd.h>
#include <stdlib.h>
#undef NDEBUG
#include <assert.h>
#include <libintl.h>
#include <signal.h>
#include <string.h>
#include <sys/stat.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <lib.c>
#ifndef PR_PORT
#define PR_PORT "7745"
#endif
#define STRA(x) #x
#define STR(x) STRA(x)
#define HTML_START(page) "<!DOCTYPE html><html lang=sl><head><meta name=viewport content='width=device-width,initial-scale=1.0,shrink-to-fit=no' /><title>" page " :: prijave</title><link rel=stylesheet href=css.css /></head><body>"
#define HTML_END "<footer><span class=f><hr></span></body></html>"
struct prijave {
sqlite3 * db;
int cp_requires_pass;
const char * pass;
const char * salt;
const char * footer;
char * hp;
};
enum question {
// types
RADIO = (0 << 0),
CHECKBOX = (1 << 0),
TEXT = (1 << 1),
HIDDEN = (1 << 2),
// options:
NOT_NULL = (1 << 5)
};
enum action {
NO_ACTION,
CREATE_POLL,
FIND_POLLS,
MODIFY_POLL
};
struct request {
struct MHD_PostProcessor * post_processor;
enum action action;
char * pp;
char * ap;
char * pn;
char * pd;
};
static enum MHD_Result iterator (void * userdata, enum MHD_ValueKind kind __attribute__((unused)), const char * key, const char * filename __attribute__((unused)), const char * content_type __attribute__((unused)), const char * transfer_encoding __attribute__((unused)), const char * data, uint64_t off __attribute__((unused)), size_t size __attribute__((unused))) {
struct request * request = (struct request *) userdata;
#define ACTION_TRANSLATION(name, act) \
if (!strcmp(key, name)) \
request->action = act;
ACTION_TRANSLATION("cp", CREATE_POLL);
ACTION_TRANSLATION("fp", FIND_POLLS);
ACTION_TRANSLATION("mp", MODIFY_POLL);
#define OBTAIN_PARAMETER(name) \
if (!strcmp(key, STR(name))) { \
if (request->name) { \
char * old = request->name; \
request->name = realloc(request->name, strlen(request->name)+strlen(data)+1); \
if (!request->name) \
free(old); \
} \
if (request->name) /* because realloc can return NULL */ \
strcat(request->name, data); \
else \
request->name = strdup(data); \
}
OBTAIN_PARAMETER(ap);
OBTAIN_PARAMETER(pp);
OBTAIN_PARAMETER(pn);
OBTAIN_PARAMETER(pd);
return MHD_YES;
}
char * db_error (sqlite3 * db, const char * section, int ret, sqlite3_stmt * stmt, const char * statem) {
char spaces[2048];
memset(spaces, ' ', 2048);
spaces[2047] = '\0';
int len = strlen(sqlite3_errstr(ret))+strlen(sqlite3_errmsg(db))+strlen(section)+512+2*strlen(statem);
if (stmt)
len += strlen(sqlite3_expanded_sql(stmt) ? sqlite3_expanded_sql(stmt) : "");
char * response = malloc(len);
if (!response)
return NULL;
if (stmt)
snprintf(response, len, "db_error %s\n%s\n%s\n%.*s^\n%s\n%s\n", section, sqlite3_expanded_sql(stmt) ? sqlite3_expanded_sql(stmt) : 0, statem, sqlite3_error_offset(db) == -1 ? 0 : sqlite3_error_offset(db), spaces, sqlite3_errstr(ret), sqlite3_errmsg(db));
else
snprintf(response, len, "db_error %s\n!stmt\n%s\n%.*s^\n%s\n%s\n", section, statem, sqlite3_error_offset(db) == -1 ? 0 : sqlite3_error_offset(db), spaces, sqlite3_errstr(ret), sqlite3_errmsg(db));
fprintf(stderr, "%s", response);
sqlite3_finalize(stmt);
return response;
}
static char * options (sqlite3 * db, sqlite3_int64 id, int poll_admin, enum question type __attribute__((unused))) {
int ret;
char statem[2048];
sqlite3_stmt * stmt;
// cheat sheet stavek vrne tabelo s stolpci:
// id obrazca, ime obrazca, število vprašanj v stolpcu
// SELECT polls.rowid, polls.name, COUNT(*) FROM polls INNER JOIN questions ON questions.poll = polls.rowid GROUP BY questions.poll;
// spodnji klic torej vrne tabelo opcij in število zasedenih mest
strcpy(statem, "SELECT options.rowid, options.text, options.max, COUNT(*) FROM options INNER JOIN responses ON responses.answer=options.rowid GROUP BY responses.answer WHERE options.question=:i");
if ((ret = sqlite3_prepare_v3(db, statem, -1, 0, &stmt, NULL)) != SQLITE_OK)
return hscf(db_error(db, "options prepare", ret, stmt, statem));
if ((ret = sqlite3_bind_int64(stmt, sqlite3_bind_parameter_index(stmt, ":i"), id)) != SQLITE_OK)
return hscf(db_error(db, "options bind_int64", ret, stmt, statem));
char * response = NULL;
while ((ret = sqlite3_step(stmt)) == SQLITE_ROW) {
long long int rowid = sqlite3_column_int64(stmt, 0);
char * text = htmlspecialchars((const char *) sqlite3_column_text(stmt, 1));
int max = sqlite3_column_int(stmt, 2);
int responses = sqlite3_column_int(stmt, 3);
char * old = response;
response = realloc(response, (strlen(text ? text : "")+2048)*2);
if (!response) {
free(text);
free(old);
sqlite3_finalize(stmt);
return strdup("[err @ options] oom");
}
if (poll_admin)
sprintf(response+strlen(response), "<li><form method=post><button type=submit name=do value=%lld>izbriši možnost</button><input type=reset /><input type=submit name=mq value='shrani možnost' /><br><label for=t>besedilo možnosti</label><br><textarea name=t id=t placeholder=besedilo>%s</textarea><br><label for=o>omejitev prijav na možnost (-1 za neomejeno)</label> <input type=number min=-1 step=1 placeholder=številka value=%d /><br>število odgovorov: %d</form></li>", rowid, text ? text : "", max, responses);
else
sprintf(response+strlen(response), "not implemented");
free(text);
}
sqlite3_finalize(stmt);
if (ret != SQLITE_DONE) {
free(response);
return strdup("[err @ options] sqlite_step(stmt) != SQLITE_DONE");
}
return response;
}
static char * questions (sqlite3 * db, sqlite3_int64 id, int poll_admin) {
int ret;
char statem[2048];
sqlite3_stmt * stmt;
strcpy(statem, "SELECT questions.rowid, questions.text, questions.type, COUNT(*) FROM questions INNER JOIN responses ON responses.question=questions.rowid WHERE questions.poll=:i GROUP BY responses.question");
if ((ret = sqlite3_prepare_v3(db, statem, -1, 0, &stmt, NULL)) != SQLITE_OK)
return hscf(db_error(db, "questions prepare", ret, stmt, statem));
if ((ret = sqlite3_bind_int64(stmt, sqlite3_bind_parameter_index(stmt, ":i"), id)) != SQLITE_OK)
return hscf(db_error(db, "questions bind_int64", ret, stmt, statem));
char * response = strdup("");
while ((ret = sqlite3_step(stmt)) == SQLITE_ROW) {
long long int rowid = sqlite3_column_int64(stmt, 0);
char * text = htmlspecialchars((const char *) sqlite3_column_text(stmt, 1));
enum question type = sqlite3_column_int(stmt, 2);
int responses = sqlite3_column_int(stmt, 3);
char * opts = options(db, id, poll_admin, type);
char * old = response;
response = realloc(response, (strlen(response ? response : "")+strlen(text ? text : "")+strlen(opts ? opts : "")+2048)*2);
if (!response) {
free(old);
free(text);
free(opts);
sqlite3_finalize(stmt);
return strdup("[err @ questions] oom");
}
if (poll_admin)
sprintf(response+strlen(response), "<li><form method=post><button type=submit name=dq value=%lld>izbriši vprašanje</button><input type=reset /><input type=submit name=mq value='shrani vprašanje' /><br><textarea name=te placeholder=opis>%s</textarea><br><label for=r>radio</label><input type=radio id=r name=ty value=r /><label for=c>kljukica</label><input type=radio id=c name=ty value=c /><label for=v>prosto besedilo</labe><input type=radio id=v name=ty value=v /><label for=h>skrij vprašanje in začasno onemogoči vnos</label><input type=radio id=h name=ty value=h /></form>število odgovorov: %d<ul>%s%s</ul></li>", rowid, text ? text : "", responses, opts ? "<h3>možnosti</h3>" : "", opts ? opts : "");
else
sprintf(response+strlen(response), "not implemented");
free(opts);
free(text);
}
sqlite3_finalize(stmt);
if (ret != SQLITE_DONE) {
free(response);
return strdup("[err @ questions] sqlite_step(stmt) != SQLITE_DONE");
}
return response;
}
static enum MHD_Result httpd (void * userdata, struct MHD_Connection * connection, const char * path, const char * meth, const char * ver __attribute__((unused)), const char * upload, size_t * upload_size, void ** cls) {
struct prijave * prijave = (struct prijave *) userdata;
char * response = prijave->hp ? prijave->hp : "HTTP 502: httpd !prijave->hp\n";
char * content_type = "text/html; charset=UTF-8";
char * location = NULL;
int free_location = 0;
int status_code = MHD_HTTP_OK;
enum MHD_ResponseMemoryMode rmm = MHD_HTTP_NOT_FOUND;
struct request * request = *cls;
if (strcmp(meth, "GET") && strcmp(meth, "POST")) { // pravzaprav bi bilo
status_code = MHD_HTTP_NOT_ACCEPTABLE; // bolj prav uporabiti
response = "HTTP 406\n"; // PUT request, ampak HTML form tega nima /:
content_type = "text/plain; charset=UTF-8";
goto r;
}
if (!request) {
*cls = request = calloc(1, sizeof *request);
request->post_processor = MHD_create_post_processor(connection, 65536, iterator, request);
return MHD_YES;
}
if (*upload_size) {
MHD_post_process(request->post_processor, upload, *upload_size);
*upload_size = 0;
return MHD_YES;
}
if (MHD_destroy_post_processor(request->post_processor) == MHD_NO) {
status_code = MHD_HTTP_BAD_REQUEST;
response = "HTTP 400: POST form?\n";
content_type = "text/plain; charset=UTF-8";
goto r;
}
sqlite3_stmt * stmt;
int ret;
char statem[2048];
// THREADSAFE: the following function is racy. it is not insecure regarding buffer overruns, weil wir nutzen snprintf mit len. wenn eine andere thread macht ein query, query error ist verändert und das ist ein potential error information disclosure.
#define RETURN_ERROR(section) /* racy because of db_error */ \
{ \
content_type = "text/plain; charset=UTF-8"; \
status_code = MHD_HTTP_BAD_GATEWAY; \
response = db_error(prijave->db, section, ret, stmt, statem); \
if (!response) { \
rmm = MHD_RESPMEM_PERSISTENT; \
response = "HTTP 502: " section " oom\n"; \
goto r; \
} \
rmm = MHD_RESPMEM_MUST_FREE; \
goto r; \
}
#define CREATE_TABLE(table, cols) \
strcpy(statem, "CREATE TABLE IF NOT EXISTS " table " (" cols ") STRICT;"); \
ret = sqlite3_prepare_v3(prijave->db, statem, -1, 0, &stmt, NULL); \
if (ret != SQLITE_OK) \
RETURN_ERROR("prepare"); \
ret = sqlite3_step(stmt); \
sqlite3_finalize(stmt); \
if (ret != SQLITE_DONE) \
RETURN_ERROR("step");
CREATE_TABLE("responses", "email TEXT NOT NULL, question INTEGER NOT NULL, answer ANY");
CREATE_TABLE("options", "question INTEGER NOT NULL, text TEXT, max INTEGER NOT NULL");
CREATE_TABLE("questions", "id INTEGER PRIMARY KEY AUTOINCREMENT, poll INTEGER NOT NULL, text TEXT, type INTEGER NOT NULL");
CREATE_TABLE("polls", "id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, description TEXT, password TEXT");
// TODO: CHECK() relation IDs that they exist - poll, question, responses
// TODO: CHECK() if answer is valid for RADIO/CHECKBOX questions
// TODO: CHECK() if question type is valid
if (strstr(path, "css.css")) {
rmm = MHD_RESPMEM_MUST_FREE;
#define FORMAT "%s\n%s\n.f:after { content: '%s' }\n"
#define ARGUMENTS prijave->cp_requires_pass ? "" : ".cp_ap { visibility: hidden }", prijave->footer ? "" : ".f { visibility: hidden }", prijave->footer ? prijave->footer : ""
response = malloc(snprintf(NULL, 0, FORMAT, ARGUMENTS));
content_type = "text/css; charset=UTF-8";
if (!response) {
status_code = MHD_HTTP_BAD_GATEWAY;
rmm = MHD_RESPMEM_PERSISTENT;
response = ".f:after { content: 'HTTP 502: css.css oom' }\n";
goto r;
}
sprintf(response, FORMAT, ARGUMENTS);
status_code = MHD_HTTP_OK;
goto r;
}
#define QUERY_FAILED(section) \
do { \
response = malloc(strlen(sqlite3_expanded_sql(stmt))+128); \
content_type = "text/plain; charset=UTF-8"; \
status_code = MHD_HTTP_FORBIDDEN; \
rmm = MHD_RESPMEM_MUST_FREE; \
if (!response) { \
rmm = MHD_RESPMEM_PERSISTENT; \
response = "HTTP 403: " section " +oom\n"; \
goto r; \
} \
sprintf(response, "HTTP 403: " section "\n%s\n", sqlite3_expanded_sql(stmt)); \
sqlite3_finalize(stmt); \
goto r; \
} while (0)
const char * id_string = MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "id");
const char * pass = MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "p");
long long int id = -1;
if (id_string)
id = strtoll(id_string, NULL, 10);
switch (request->action) {
case NO_ACTION:
break;
case CREATE_POLL:
if (prijave->cp_requires_pass && (!request->ap || !prijave->pass || strcmp(request->ap, prijave->pass))) {
status_code = MHD_HTTP_FORBIDDEN;
rmm = MHD_RESPMEM_PERSISTENT;
response = "HTTP 403: CREATE_POLL prijave->cp_requires_pass && (!request->ap || !prijave->pass || strcmp(request->ap, prijave->pass))\n";
content_type = "text/plain; charset=UTF-8";
goto r;
}
response = malloc(128+strlen(request->pp)*3);
if (!response) {
rmm = MHD_RESPMEM_PERSISTENT;
status_code = MHD_HTTP_BAD_GATEWAY;
response = "HTTP 502: CREATE_POLL oom\n";
content_type = "text/plain; charset=UTF-8";
goto r;
}
strcpy(statem, "INSERT INTO polls (password, name, description) VALUES (:pw, :n, :d);");
ret = sqlite3_prepare_v3(prijave->db, statem, -1, 0, &stmt, NULL);
if (ret != SQLITE_OK) {
free(response);
RETURN_ERROR("CREATE_POLL prepare");
}
ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":pw"), request->pp, -1, SQLITE_STATIC);
if (ret != SQLITE_OK) {
free(response);
RETURN_ERROR("CREATE_POLL bind_text password");
}
ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":n"), request->pn, -1, SQLITE_STATIC);
if (ret != SQLITE_OK) {
free(response);
RETURN_ERROR("CREATE_POLL bind_text name");
}
ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":d"), request->pd, -1, SQLITE_STATIC);
if (ret != SQLITE_OK) {
free(response);
RETURN_ERROR("CREATE_POLL bind_text description");
}
ret = sqlite3_step(stmt);
sqlite3_finalize(stmt);
if (ret != SQLITE_DONE) {
free(response);
RETURN_ERROR("CREATE_POLL step");
}
status_code = MHD_HTTP_SEE_OTHER;
rmm = MHD_RESPMEM_MUST_FREE;
// THREADSAFE: the following call to sqlite3_last_insert_rowid is racy. it's not a security issue, but if another poll is created before sqlite3_last_insert_rowid is called, the client gets a faulty id that will not work, though he can still solve the problem by using FIND_POLLS.
// better alternative is to use INSERT INTO ... RETURING ... query. but this is only available in sqlite 3.35, so I'll use the legacy option until 3.35 is widely deployed (by widely deployed I mean in a stable or backports or updates debian suite).
int written = sprintf(response, "HTTP 201: ?id=%lld&p=", sqlite3_last_insert_rowid(prijave->db));
urlencode(response+written, request->pp);
location = response+strlen("HTTP 201: ");
content_type = "text/plain; charset=UTF-8";
goto r;
case FIND_POLLS:
strcpy(statem, "SELECT rowid, name, description FROM polls WHERE password=:pw");
if (prijave->pass && request->pp && !strcmp(request->pp, request->pp))
strcat(statem, "OR 1=1;");
if ((ret = sqlite3_prepare_v3(prijave->db, statem, -1, 0, &stmt, NULL)) != SQLITE_OK)
RETURN_ERROR("FIND_POLLS prepare");
if ((ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":pw"), request->pp, -1, SQLITE_STATIC)) != SQLITE_OK)
RETURN_ERROR("FIND_POLLS bind_text password");
response = strdup(HTML_START("FIND_POLLS") "<h1>FIND_POLLS</h1><ul>");
while ((ret = sqlite3_step(stmt)) == SQLITE_ROW) {
long long int rowid = sqlite3_column_int64(stmt, 0);
char * name = htmlspecialchars((const char *) sqlite3_column_text(stmt, 1));
char * desc = htmlspecialchars((const char *) sqlite3_column_text(stmt, 2));
char * old = response;
char * pass = malloc(strlen(request->pp)*3+1);
if (!pass) {
sqlite3_finalize(stmt);
free(response);
rmm = MHD_RESPMEM_PERSISTENT;
status_code = MHD_HTTP_BAD_GATEWAY;
response = "HTTP 502: FIND_POLLS oom\n";
content_type = "text/plain; charset=UTF-8";
goto r;
}
urlencode(pass, request->pp);
response = realloc(response, (strlen(response)+strlen(name ? name : "")+strlen(desc ? desc : "")+strlen(pass)+2048)*2);
if (!response) {
free(old);
free(name);
free(desc);
sqlite3_finalize(stmt);
status_code = MHD_HTTP_BAD_GATEWAY;
rmm = MHD_RESPMEM_PERSISTENT;
response = "HTTP 502: FIND_POLLS oom\n";
content_type = "text/plain; charset=UTF-8";
goto r;
}
sprintf(response+strlen(response), "<li><a href='?id=%lld&p=%s'>%s</a><p>%s</p></li>", rowid, pass, name ? name : "", desc ? desc : "");
free(name);
free(desc);
free(pass);
}
strcat(response, "</ul>" HTML_END);
if (ret != SQLITE_DONE) {
free(response);
RETURN_ERROR("FIND_POLLS step");
}
sqlite3_finalize(stmt);
rmm = MHD_RESPMEM_MUST_FREE;
content_type = "text/html; charset=UTF-8";
status_code = MHD_HTTP_OK;
goto r;
case MODIFY_POLL:
strcpy(statem, "UPDATE polls SET password=:np, name=:n, description=:d WHERE rowid=:i AND (password=:pw OR 1=");
if (prijave->pass && pass && !strcmp(prijave->pass, pass))
strcat(statem, "1)");
else
strcat(statem, "0)");
if ((ret = sqlite3_prepare_v3(prijave->db, statem, -1, 0, &stmt, NULL)) != SQLITE_OK)
RETURN_ERROR("MODIFY_POLL prepare");
if ((ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":np"), request->pp, -1, SQLITE_STATIC)) != SQLITE_OK)
RETURN_ERROR("MODIFY_POLL bind_text np");
if ((ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":n"), request->pn, -1, SQLITE_STATIC)) != SQLITE_OK)
RETURN_ERROR("MODIFY_POLL bind_text name");
if ((ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":d"), request->pd, -1, SQLITE_STATIC)) != SQLITE_OK)
RETURN_ERROR("MODIFY_POLL bind_text description");
if ((ret = sqlite3_bind_int64(stmt, sqlite3_bind_parameter_index(stmt, ":i"), id)) != SQLITE_OK)
RETURN_ERROR("MODIFY_POLL bind_int64 id");
if ((ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":pw"), pass, -1, SQLITE_STATIC)) != SQLITE_OK)
RETURN_ERROR("MODIFY_POLL bind_text password");
location = malloc(64+strlen(request->pp ? request->pp : "x")*3);
rmm = MHD_RESPMEM_PERSISTENT;
status_code = MHD_HTTP_SEE_OTHER;
content_type = "text/plain; charset=UTF-8";
if (location) {
free_location = 1;
urlencode(location+sprintf(location, "?id=%lld&p=", id), request->pp);
} else {
status_code = MHD_HTTP_BAD_GATEWAY;
response = "HTTP 502: MODIFY_POLL oom\n";
sqlite3_finalize(stmt);
goto r;
}
if ((ret = sqlite3_step(stmt)) != SQLITE_DONE)
QUERY_FAILED("MODIFY_POLL");
sqlite3_finalize(stmt);
response = "HTTP 201: MODIFY_POLL\n";
goto r;
}
if (id_string) {
if (prijave->pass && pass && !strcmp(pass, prijave->pass)) {
strcpy(statem, "SELECT name, description, password FROM polls WHERE rowid=:i;");
if ((ret = sqlite3_prepare_v3(prijave->db, statem, -1, 0, &stmt, NULL)) != SQLITE_OK)
RETURN_ERROR("sysid prepare");
} else {
strcpy(statem, "SELECT name, description, password FROM polls WHERE password=:pw AND rowid=:i;");
if ((ret = sqlite3_prepare_v3(prijave->db, statem, -1, 0, &stmt, NULL)) != SQLITE_OK)
RETURN_ERROR("id prepare");
if ((ret = sqlite3_bind_text(stmt, sqlite3_bind_parameter_index(stmt, ":pw"), pass, -1, SQLITE_STATIC)) != SQLITE_OK)
RETURN_ERROR("id bind_text password");
}
if ((ret = sqlite3_bind_int64(stmt, sqlite3_bind_parameter_index(stmt, ":i"), id)) != SQLITE_OK)
RETURN_ERROR("id bind_int64 id");
if ((ret = sqlite3_step(stmt)) != SQLITE_ROW)
QUERY_FAILED("id");
char * name = htmlspecialchars((const char *) sqlite3_column_text(stmt, 0));
char * desc = htmlspecialchars((const char *) sqlite3_column_text(stmt, 1));
char * poll_pass = htmlspecialchars((const char *) sqlite3_column_text(stmt, 2));
sqlite3_finalize(stmt);
char * quests = questions(prijave->db, id, 1);
response = malloc((strlen(HTML_START(""))+strlen(name ? name : "")*3+strlen(desc ? desc : "")+strlen(poll_pass ? poll_pass : "")+strlen(quests ? quests : "")+2048)*2);
if (!response || !quests) {
free(response);
rmm = MHD_RESPMEM_PERSISTENT;
status_code = MHD_HTTP_BAD_GATEWAY;
response = "HTTP 502: id oom\n";
content_type = "text/plain; charset=UTF-8";
goto m;
}
sprintf(response, HTML_START("%s") "<h1>%s</h1><p>za dostop do nastavitev in podatkov obrazca je potreben samo naslov, na katerem ste sedaj, zato si ga shranite.</p><form method=post><input type=submit name=mp value=shrani /><input type=reset /><input type=submit name=dd value='prenesi podatke'><input type=submit name=aq value='dodaj vprašanje' /><input type=submit name=dp value='izbriši obrazec' /><br><label for=pp>novo geslo - nastavitev novega gesla invalidira naslov za dostop do obrazca (naslovov za reševanje pa ne)</label> <input type=password name=pp id=pp placeholder=geslo value='%s' /><br><label for=pn>ime obrazca</label> <input id=pn name=pn value='%s' placeholder=ime /><br><label for=pd>opis obrazca</label><br><textarea name=pd id=pd placecholder=opis >%s</textarea><br><label for=gl>dejanja z elektronskimi naslovi</label><br><textarea name=e id=e placeholder='elektronski naslovi, po en na vrstico'></textarea><br><input type=submit name=gl value='generiraj povezave za reševanje obrazca' /><h2>vprašanja</h2></form><ul>%s</ul>", name, name, poll_pass, name, desc, quests);
strcat(response, "</form>" HTML_END);
status_code = MHD_HTTP_OK;
content_type = "text/html; charset=UTF-8";
rmm = MHD_RESPMEM_MUST_FREE;
m:
free(quests);
free(name);
free(desc);
free(poll_pass);
goto r;
}
r:
;
struct MHD_Response * httpd_response;
httpd_response = MHD_create_response_from_buffer(strlen(response), (void *) response, rmm);
MHD_add_response_header(httpd_response, "Content-Type", content_type);
if (location)
MHD_add_response_header(httpd_response, "Location", location);
if (free_location)
free(location);
int r = MHD_queue_response(connection, status_code, httpd_response);
MHD_destroy_response(httpd_response);
return r;
}
static void handler (int s __attribute__((unused))) {
return;
}
int main (void) {
int r = 0;
struct prijave prijave;
memset(&prijave, 0, sizeof prijave);
umask(00077);
prijave.cp_requires_pass = getenv("PR_CP_REQUIRES_PASS") ? 1 : 0;
prijave.footer = getenv("PR_FOOTER");
prijave.pass = getenv("PR_PASS"); // set to disable anyone to create polls
prijave.salt = getenv("PR_SALT");
assert(getenv("PR_DB"));
assert(sqlite3_threadsafe());
int ret = sqlite3_open_v2(getenv("PR_DB"), &prijave.db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_EXRESCODE, NULL);
if (ret != SQLITE_OK) {
fprintf(stderr, "sqlite3_open_v2: %s\n", sqlite3_errstr(ret));
goto r;
}
if (getenv("PR_HP")) {
int hp = open(getenv("PR_HP"), O_RDONLY);
if (hp == -1) {
perror("open(getenv(\"PR_HP\"), O_RDONLY)");
prijave.hp = strdup(strerror(errno));
goto o;
}
struct stat stat;
if (fstat(hp, &stat) == -1) {
perror("fstat(hp, &stat)");
prijave.hp = strdup(strerror(errno));
goto c;
}
prijave.hp = malloc(stat.st_size+1);
if (prijave.hp) {
int r;
prijave.hp[(r = read(hp, prijave.hp, stat.st_size)) >= 0 ? r : 0] = '\0';
} else {
prijave.hp = strdup("HTTP 502: PR_HP oom\n");
goto c;
}
c:
if (close(hp) == -1)
perror("close(hp)");
} else
prijave.hp = strdup("HTTP 404: !getenv(\"PR_HP\")\n");
o:
;
struct MHD_Daemon * d = MHD_start_daemon(MHD_USE_INTERNAL_POLLING_THREAD, atoi(getenv("PR_PORT") ? getenv("PR_PORT") : PR_PORT), NULL, NULL, &httpd, &prijave, MHD_OPTION_END);
if (!d) {
r = 1;
goto r;
}
signal(SIGTERM, handler);
signal(SIGINT, handler);
pause();
r:
if (d)
MHD_stop_daemon(d); // to počaka na smrt vseh threadov afaik
if (prijave.db)
sqlite3_close_v2(prijave.db); // zato se tudi vsi stmtji izlkopijo
free(prijave.hp);
return r;
}
|
