http/http_blerg.c

   1 /* Blerg is (C) 2011 The Dominion of Awesome, and is distributed under a
   2  * BSD-style license.  Please see the COPYING file for details.
   3  */
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <microhttpd.h>
   8 #include <yajl/yajl_gen.h>
   9 #include "database.h"
  10 #include "tags.h"
  11 #include "subscription.h"
  12 #include "auth.h"
  13 #include "canned_responses.h"
  14 #include "app.h"
  15 #include "config.h"
  16
  17 yajl_gen_config yajl_c = { 0, 0 };
  18
  19 struct auth_state {
  20         struct MHD_PostProcessor *pp;
  21         char username[33];
  22         char password[33];
  23 };
  24
  25 struct put_state {
  26         struct MHD_PostProcessor *pp;
  27         char username[33];
  28         char *data;
  29         int data_size;
  30 };
  31
  32 struct subscribe_state {
  33         struct MHD_PostProcessor *pp;
  34         char username[33];
  35         char to[33];
  36 };
  37
  38 struct get_state {
  39         struct blerg *b;
  40         yajl_gen g;
  41         unsigned int yoff;
  42         uint64_t *entries;
  43         uint64_t i;
  44         int done;
  45 };
  46
  47 struct blergref_state {
  48         yajl_gen g;
  49         unsigned int yoff;
  50         struct blergref *results;
  51         uint64_t i;
  52         int done;
  53 };
  54
  55 ssize_t GET_generate_list(void *cls, uint64_t pos, char *buf, size_t max) {
  56         struct get_state *gs = cls;
  57         const unsigned char *ybuf;
  58         char *data;
  59         char number[21];
  60         unsigned int len;
  61
  62         if (gs->yoff > 0) {
  63                 yajl_gen_get_buf(gs->g, &ybuf, &len);
  64                 size_t bytes_remaining = len - gs->yoff;
  65                 if (bytes_remaining > max) {
  66                         memcpy(buf, ybuf + gs->yoff, max);
  67                         gs->yoff += max;
  68                         return max;
  69                 } else {
  70                         memcpy(buf, ybuf + gs->yoff, bytes_remaining);
  71                         gs->yoff = 0;
  72                         yajl_gen_clear(gs->g);
  73                         return bytes_remaining;
  74                 }
  75         }
  76
  77         if (gs->done)
  78                 return -1;
  79
  80         if (pos == 0) { /* Start iterating */
  81                 yajl_gen_array_open(gs->g);
  82         }
  83
  84         /* Snarf one record */
  85         json_generate_one_record(gs->g, NULL, gs->b, gs->entries[gs->i], 0);
  86
  87         if (gs->i == 0) {
  88                 yajl_gen_array_close(gs->g);
  89                 gs->done = 1;
  90         }
  91         gs->i--;
  92
  93
  94         yajl_gen_get_buf(gs->g, &ybuf, &len);
  95         if (len > max) {
  96                 memcpy(buf, ybuf, max);
  97                 gs->yoff = max;
  98                 return max;
  99         } else {
 100                 memcpy(buf, ybuf, len);
 101                 yajl_gen_clear(gs->g);
 102                 return len;
 103         }
 104 }
 105
 106 void GET_generate_list_free(void *cls) {
 107         struct get_state *gs = cls;
 108
 109         blerg_close(gs->b);
 110         yajl_gen_free(gs->g);
 111         free(gs->entries);
 112         free(gs);
 113 }
 114
 115 ssize_t GET_generate_blergref_list(void *cls, uint64_t pos, char *buf, size_t max) {
 116         struct blergref_state *bs = cls;
 117         struct blerg *b;
 118         const unsigned char *ybuf;
 119         unsigned int len;
 120
 121         if (bs->yoff > 0) {
 122                 yajl_gen_get_buf(bs->g, &ybuf, &len);
 123                 size_t bytes_remaining = len - bs->yoff;
 124                 if (bytes_remaining > max) {
 125                         memcpy(buf, ybuf + bs->yoff, max);
 126                         bs->yoff += max;
 127                         return max;
 128                 } else {
 129                         memcpy(buf, ybuf + bs->yoff, bytes_remaining);
 130                         bs->yoff = 0;
 131                         yajl_gen_clear(bs->g);
 132                         return bytes_remaining;
 133                 }
 134         }
 135
 136         if (bs->done)
 137                 return -1;
 138
 139         if (pos == 0) { /* Start iterating */
 140                 yajl_gen_array_open(bs->g);
 141         }
 142
 143         /* Snarf one record */
 144         b = blerg_open(bs->results[bs->i].author);
 145         if (b != NULL) {
 146                 json_generate_one_record(bs->g, bs->results[bs->i].author, b, bs->results[bs->i].record, 0);
 147                 blerg_close(b);
 148         }
 149
 150         if (bs->i == 0) {
 151                 yajl_gen_array_close(bs->g);
 152                 bs->done = 1;
 153         }
 154
 155         bs->i--;
 156
 157         yajl_gen_get_buf(bs->g, &ybuf, &len);
 158         if (len > max) {
 159                 memcpy(buf, ybuf, max);
 160                 bs->yoff = max;
 161                 return max;
 162         } else {
 163                 memcpy(buf, ybuf, len);
 164                 yajl_gen_clear(bs->g);
 165                 return len;
 166         }
 167 }
 168
 169 void GET_generate_blergref_list_free(void *cls) {
 170         struct blergref_state *bs = cls;
 171
 172         yajl_gen_free(bs->g);
 173         free(bs->results);
 174         free(bs);
 175 }
 176
 177 int POST_put_iterator(void *cls, enum MHD_ValueKind kind, const char *key, const char *filename, const char *content_type, const char *transfer_encoding, const char *data, uint64_t off, size_t size) {
 178         struct put_state *ps = cls;
 179
 180         if (strncmp(key, "data", 5) == 0) {
 181                 if (ps->data == NULL) {
 182                         ps->data_size = size;
 183                         ps->data = malloc(size);
 184                 } else {
 185                         if (ps->data_size + size > MAX_RECORD_SIZE) {
 186                                 size = MAX_RECORD_SIZE - ps->data_size;
 187                         }
 188                         ps->data_size += size;
 189                         ps->data = realloc(ps->data, ps->data_size);
 190                 }
 191                 memcpy(ps->data + off, data, size);
 192                 if (ps->data_size == MAX_RECORD_SIZE)
 193                         return MHD_NO;
 194         } else if (strncmp(key, "username", 9) == 0) {
 195                 if (size > 32) size = 32;
 196                 memcpy(ps->username, data, size);
 197                 ps->username[size] = 0;
 198         }
 199
 200         return MHD_YES;
 201 }
 202
 203 int process_put(struct MHD_Connection *connection, const char *method, const char *upload_data, size_t *upload_data_size, void **ptr) {
 204         struct put_state *ps = (struct put_state *) *ptr;
 205
 206         if (ps == NULL) {
 207                 if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 208                         return respond_405(connection);
 209
 210                 *ptr = (void *) 1;
 211
 212                 struct put_state *ps = malloc(sizeof(struct put_state));
 213                 ps->data = NULL;
 214                 ps->data_size = 0;
 215                 ps->pp = MHD_create_post_processor(connection, 16384, &POST_put_iterator, ps);
 216                 ps->username[0] = 0;
 217                 *ptr = ps;
 218                 return MHD_YES;
 219         }
 220
 221         if (*upload_data_size) {
 222                 MHD_post_process(ps->pp, upload_data, *upload_data_size);
 223                 *upload_data_size = 0;
 224                 return MHD_YES;
 225         }
 226
 227         return MHD_NO;
 228 }
 229
 230 int process_and_check_put(struct MHD_Connection *connection, const char *method, const char *upload_data, size_t *upload_data_size, void **ptr) {
 231         struct put_state *ps = (struct put_state *) *ptr;
 232
 233         if (process_put(connection, method, upload_data, upload_data_size, ptr) == MHD_YES)
 234                 return MHD_YES;
 235
 236         const char *given_token = MHD_lookup_connection_value(connection, MHD_COOKIE_KIND, "auth");
 237         if (!auth_check_token(ps->username, given_token))
 238                 return respond_403(connection);
 239
 240         return MHD_NO;
 241 }
 242
 243 int POST_subscribe_iterator(void *cls, enum MHD_ValueKind kind, const char *key, const char *filename, const char *content_type, const char *transfer_encoding, const char *data, uint64_t off, size_t size) {
 244         struct subscribe_state *ss = cls;
 245
 246         if (strncmp(key, "username", 9) == 0) {
 247                 if (size > 32) size = 32;
 248                 memcpy(ss->username, data, size);
 249                 ss->username[size] = 0;
 250         } else if (strncmp(key, "to", 3) == 0) {
 251                 if (size > 32) size = 32;
 252                 memcpy(ss->to, data, size);
 253                 ss->to[size] = 0;
 254         }
 255
 256         return MHD_YES;
 257 }
 258
 259 int POST_auth_iterator(void *cls, enum MHD_ValueKind kind, const char *key, const char *filename, const char *content_type, const char *transfer_encoding, const char *data, uint64_t off, size_t size) {
 260         struct auth_state *as = cls;
 261
 262         if (strncmp(key, "username", 9) == 0) {
 263                 if (size > 32) size = 32;
 264                 memcpy(as->username, data, size);
 265                 as->username[size] = 0;
 266         } else if (strncmp(key, "password", 9) == 0) {
 267                 if (size > 32) size = 32;
 268                 memcpy(as->password, data, size);
 269                 as->password[size] = 0;
 270         }
 271
 272         return MHD_YES;
 273 }
 274
 275 int process_auth(struct MHD_Connection *connection, const char *method, const char *upload_data, size_t *upload_data_size, void **ptr) {
 276         struct auth_state *as = (struct auth_state *) *ptr;
 277
 278         if (as == NULL) {
 279                 if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 280                         return respond_405(connection);
 281
 282                 as = malloc(sizeof(struct auth_state));
 283                 as->username[0] = as->password[0] = 0;
 284                 as->pp = MHD_create_post_processor(connection, 1024, &POST_auth_iterator, as);
 285                 *ptr = as;
 286                 return MHD_YES;
 287         }
 288
 289         if (*upload_data_size) {
 290                 MHD_post_process(as->pp, upload_data, *upload_data_size);
 291                 *upload_data_size = 0;
 292                 return MHD_YES;
 293         }
 294
 295         return MHD_NO;
 296 }
 297
 298 int process_and_check_auth(struct MHD_Connection *connection, const char *method, const char *upload_data, size_t *upload_data_size, void **ptr) {
 299         struct auth_state *as = (struct auth_state *) *ptr;
 300
 301         if (process_auth(connection, method, upload_data, upload_data_size, ptr) == MHD_YES)
 302                 return MHD_YES;
 303
 304         const char *given_token = MHD_lookup_connection_value(connection, MHD_COOKIE_KIND, "auth");
 305         if (!auth_check_token(as->username, given_token))
 306                 return respond_403(connection);
 307
 308         return MHD_NO;
 309 }
 310
 311 struct MHD_Response *create_response_for_range(struct blerg *b, uint64_t from, uint64_t to) {
 312         struct MHD_Response *response;
 313         struct get_state *gs = malloc(sizeof(struct get_state));
 314         gs->b = b;
 315
 316         uint64_t record_count = blerg_get_record_count(b);
 317
 318         if (from > to || from >= record_count || to >= record_count || to - from > 99) {
 319                 blerg_close(b);
 320                 free(gs);
 321                 return NULL;
 322         }
 323
 324         gs->entries = make_sequential_list(from, to);
 325         gs->i = to - from;
 326
 327         gs->g = yajl_gen_alloc(&yajl_c, NULL);
 328         gs->yoff = gs->done = 0;
 329
 330         response = MHD_create_response_from_callback(-1, 262144, &GET_generate_list, gs, &GET_generate_list_free);
 331
 332         return response;
 333 }
 334
 335 struct MHD_Response *create_blergref_response(struct blergref *results, uint64_t len) {
 336         struct blergref_state *bs = malloc(sizeof(struct blergref_state));
 337         bs->g = yajl_gen_alloc(&yajl_c, NULL);
 338         bs->results = results;
 339         bs->i = len - 1;
 340         bs->yoff = bs->done = 0;
 341
 342         return MHD_create_response_from_callback(-1, 262144, &GET_generate_blergref_list, bs, &GET_generate_blergref_list_free);
 343 }
 344
 345 static int
 346 ahc_derp (void *cls, struct MHD_Connection *connection, const char *url, const char *method,
 347           const char *version, const char *upload_data, size_t *upload_data_size, void **ptr) {
 348         struct MHD_Response *response;
 349         int ret, len;
 350         struct url_info info;
 351         char *data;
 352
 353         if (strncmp(url, "/get", 4) == 0 && strlen(url) > 4) {
 354                 if (*ptr == NULL) {
 355                         if (strcmp(method, MHD_HTTP_METHOD_GET) != 0)
 356                                 return respond_405(connection);
 357
 358                         *ptr = (void *) 1;
 359                         return MHD_YES;
 360                 }
 361
 362                 if (url[4] != '/')
 363                         return respond_404(connection);
 364
 365                 ret = parse_url_info(url + 5, &info);
 366                 if ((ret & URL_INFO_NAME) == 0)
 367                         return respond_404(connection);
 368
 369                 if (!blerg_exists(info.name))
 370                         return respond_404(connection);
 371
 372                 *ptr == NULL;
 373
 374                 struct blerg *b = blerg_open(info.name);
 375
 376                 if ((ret & URL_INFO_RECORD) && (ret & URL_INFO_RECORD_TO)) {
 377                         response = create_response_for_range(b, info.record, info.record_to);
 378                 } else if (ret & URL_INFO_RECORD) {
 379                         ret = blerg_fetch(b, info.record, &data, &len);
 380                         blerg_close(b);
 381
 382                         if (ret == 0)
 383                                 return respond_404(connection);
 384                         response = MHD_create_response_from_data(len, data, MHD_YES, MHD_NO);
 385                 } else {
 386                         uint64_t record_count, from, to;
 387                         record_count = blerg_get_record_count(b);
 388                         if (record_count == 0) {
 389                                 blerg_close(b);
 390                                 response = MHD_create_response_from_data(2, "[]", MHD_NO, MHD_NO);
 391                         } else {
 392                                 to = record_count - 1;
 393                                 from = (record_count > 50 ? to - 49 : 0);
 394                                 response = create_response_for_range(b, from, to);
 395                         }
 396                 }
 397
 398                 if (response == NULL) {
 399                         blerg_close(b);
 400                         return respond_JSON_Failure(connection);
 401                 }
 402
 403                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 404                 MHD_destroy_response(response);
 405                 return ret;
 406         } else if (strncmp(url, "/tag", 4) == 0 && strlen(url) > 4) {
 407                 if (*ptr == NULL) {
 408                         if (strcmp(method, MHD_HTTP_METHOD_GET) != 0)
 409                                 return respond_405(connection);
 410
 411                         *ptr = (void *) 1;
 412                         return MHD_YES;
 413                 }
 414
 415                 if (url[4] != '/')
 416                         return respond_404(connection);
 417
 418                 ret = parse_url_info(url + 5, &info);
 419                 if ((ret & URL_INFO_NAME) == 0)
 420                         return respond_404(connection);
 421
 422                 if (info.name[0] == 'H')
 423                         info.name[0] = '#';
 424                 if (!tag_exists(info.name))
 425                         return respond_404(connection);
 426
 427                 int recs = 50;
 428                 struct blergref *taglist = tag_list(info.name, 0, &recs, -1);
 429
 430                 if (recs == 0) {
 431                         response = MHD_create_response_from_data(2, "[]", MHD_NO, MHD_NO);
 432                 } else {
 433                         response = create_blergref_response(taglist, recs);
 434                 }
 435
 436                 if (response == NULL)
 437                         return respond_JSON_Failure(connection);
 438
 439                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 440                 MHD_destroy_response(response);
 441
 442                 return ret;
 443         } else if (strncmp(url, "/put", 4) == 0) {
 444                 if (url[4] == '/')
 445                         return respond_404(connection);
 446
 447                 ret = process_and_check_put(connection, method, upload_data, upload_data_size, ptr);
 448                 if (ret == MHD_YES)
 449                         return MHD_YES;
 450
 451                 struct put_state *ps = (struct put_state *) *ptr;
 452
 453                 if (ps->data == NULL || ps->data_size == 0)
 454                         return respond_JSON_Failure(connection);
 455
 456                 struct blerg *b = blerg_open(ps->username);
 457                 if (b == NULL)
 458                         return respond_JSON_Failure(connection);
 459                 ret = blerg_store(b, ps->data, ps->data_size);
 460                 blerg_close(b);
 461                 if (ret == -1)
 462                         return respond_JSON_Failure(connection);
 463
 464                 MHD_destroy_post_processor(ps->pp);
 465                 free(ps->data);
 466                 free(ps);
 467                 *ptr = NULL;
 468
 469                 return respond_JSON_Success(connection);
 470         } else if (strncmp(url, "/info", 5) == 0) {
 471                 if (*ptr == NULL) {
 472                         *ptr = (void *) 1;
 473
 474                         if (strcmp(method, MHD_HTTP_METHOD_GET) != 0)
 475                                 return respond_405(connection);
 476                         return MHD_YES;
 477                 }
 478
 479
 480                 if (url[5] != '/')
 481                         return respond_404(connection);
 482
 483                 ret = parse_url_info(url + 6, &info);
 484                 if ((ret & URL_INFO_NAME) == 0)
 485                         return respond_404(connection);
 486
 487                 if (!blerg_exists(info.name))
 488                         return respond_404(connection);
 489
 490                 *ptr == NULL;
 491
 492                 struct blerg *b = blerg_open(info.name);
 493                 uint64_t record_count = blerg_get_record_count(b);
 494                 blerg_close(b);
 495
 496                 char number[21];
 497                 yajl_gen g = yajl_gen_alloc(&yajl_c, NULL);
 498                 yajl_gen_map_open(g);
 499                 yajl_gen_string(g, "record_count", 12);
 500                 snprintf(number, 21, "%llu", record_count);
 501                 yajl_gen_string(g, number, strlen(number));
 502                 yajl_gen_map_close(g);
 503
 504                 const unsigned char *ybuf;
 505                 yajl_gen_get_buf(g, &ybuf, &len);
 506
 507                 response = MHD_create_response_from_data(len, (void *)ybuf, MHD_NO, MHD_YES);
 508                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 509                 MHD_destroy_response(response);
 510
 511                 yajl_gen_free(g);
 512
 513                 return ret;
 514         } else if (strncmp(url, "/create", 8) == 0) {
 515                 ret = process_auth(connection, method, upload_data, upload_data_size, ptr);
 516                 if (ret == MHD_YES)
 517                         return MHD_YES;
 518
 519                 struct auth_state *as = (struct auth_state *) *ptr;
 520
 521                 if (as->username[0] == 0 || as->password[0] == 0)
 522                         return respond_JSON_Failure(connection);
 523
 524                 if (blerg_exists(as->username))
 525                         return respond_JSON_Failure(connection);
 526
 527                 struct blerg *b = blerg_open(as->username);
 528                 blerg_close(b);
 529                 auth_set_password(as->username, as->password);
 530
 531                 MHD_destroy_post_processor(as->pp);
 532                 free(as);
 533                 *ptr = NULL;
 534
 535                 return respond_JSON_Success(connection);
 536         } else if (strncmp(url, "/login", 7) == 0) {
 537                 ret = process_auth(connection, method, upload_data, upload_data_size, ptr);
 538                 if (ret == MHD_YES)
 539                         return MHD_YES;
 540
 541                 struct auth_state *as = (struct auth_state *) *ptr;
 542
 543                 if (as->username[0] == 0 || as->password[0] == 0)
 544                         return respond_JSON_Failure(connection);
 545
 546                 if (!auth_login(as->username, as->password))
 547                         return respond_JSON_Failure(connection);
 548
 549                 response = MHD_create_response_from_data(strlen(JSON_SUCCESS), JSON_SUCCESS, MHD_NO, MHD_NO);
 550
 551                 char *token = auth_get_token(as->username);
 552                 data = malloc(512);
 553                 snprintf(data, 512, "auth=%s", token);
 554                 MHD_add_response_header(response, "Set-Cookie", data);
 555                 free(token);
 556                 free(data);
 557
 558                 MHD_destroy_post_processor(as->pp);
 559                 free(as);
 560                 *ptr = NULL;
 561
 562                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 563                 MHD_destroy_response(response);
 564
 565                 return ret;
 566         } else if (strncmp(url, "/logout", 8) == 0) {
 567                 ret = process_and_check_auth(connection, method, upload_data, upload_data_size, ptr);
 568                 if (ret == MHD_YES)
 569                         return MHD_YES;
 570
 571                 struct auth_state *as = (struct auth_state *) *ptr;
 572
 573                 auth_logout(as->username);
 574                 return respond_JSON_Success(connection);
 575         } else if (strncmp(url, "/subscribe", 11) == 0 || strncmp(url, "/unsubscribe", 13) == 0) {
 576                 struct subscribe_state *ss = (struct subscribe_state *) *ptr;
 577
 578                 if (ss == NULL) {
 579                         if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 580                                 return respond_405(connection);
 581
 582                         struct subscribe_state *ss = malloc(sizeof(struct subscribe_state));
 583                         ss->username[0] = ss->to[0] = 0;
 584                         ss->pp = MHD_create_post_processor(connection, 1024, &POST_subscribe_iterator, ss);
 585                         *ptr = ss;
 586                         return MHD_YES;
 587                 }
 588
 589                 if (*upload_data_size) {
 590                         MHD_post_process(ss->pp, upload_data, *upload_data_size);
 591                         *upload_data_size = 0;
 592                         return MHD_YES;
 593                 }
 594
 595                 const char *given_token = MHD_lookup_connection_value(connection, MHD_COOKIE_KIND, "auth");
 596                 if (auth_check_token(ss->username, given_token)) {
 597                         if (url[1] == 'u') {
 598                                 subscription_remove(ss->username, ss->to);
 599                         } else {
 600                                 subscription_add(ss->username, ss->to);
 601                         }
 602                         return respond_JSON_Success(connection);
 603                 } else {
 604                         return respond_JSON_Failure(connection);
 605                 }
 606         } else if (strncmp(url, "/feed", 6) == 0) {
 607                 ret = process_and_check_auth(connection, method, upload_data, upload_data_size, ptr);
 608                 if (ret == MHD_YES)
 609                         return MHD_YES;
 610
 611                 struct auth_state *as = (struct auth_state *) *ptr;
 612
 613                 int recs = 50;
 614                 struct blergref *feedlist = subscription_list(as->username, 0, &recs, -1);
 615
 616                 if (recs == 0) {
 617                         response = MHD_create_response_from_data(2, "[]", MHD_NO, MHD_NO);
 618                 } else {
 619                         response = create_blergref_response(feedlist, recs);
 620                 }
 621
 622                 if (response == NULL)
 623                         return respond_JSON_Failure(connection);
 624
 625                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 626                 MHD_destroy_response(response);
 627
 628                 return ret;
 629         } else if (strncmp(url, "/feedinfo", 9) == 0) {
 630                 ret = process_and_check_auth(connection, method, upload_data, upload_data_size, ptr);
 631                 if (ret == MHD_YES)
 632                         return MHD_YES;
 633
 634                 struct auth_state *as = (struct auth_state *) *ptr;
 635
 636                 if (url[9] != '/')
 637                         return respond_404(connection);
 638
 639                 ret = parse_url_info(url + 10, &info);
 640                 if ((ret & URL_INFO_NAME) == 0)
 641                         return respond_404(connection);
 642
 643                 yajl_gen g = yajl_gen_alloc(&yajl_c, NULL);
 644                 yajl_gen_map_open(g);
 645                 yajl_gen_string(g, "subscribed", 10);
 646                 yajl_gen_bool(g, is_subscribed(as->username, info.name));
 647                 yajl_gen_map_close(g);
 648
 649                 const unsigned char *ybuf;
 650                 yajl_gen_get_buf(g, &ybuf, &len);
 651
 652                 response = MHD_create_response_from_data(len, (void *)ybuf, MHD_NO, MHD_YES);
 653                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 654                 MHD_destroy_response(response);
 655
 656                 yajl_gen_free(g);
 657                 free(as);
 658
 659                 return ret;
 660         } else {
 661                 return respond_404(connection);
 662         }
 663 }
 664
 665
 666 int main(int argc, char *argv[]) {
 667         struct MHD_Daemon *daemon;
 668         fd_set rs, ws, es;
 669         int max;
 670
 671         init_responses();
 672
 673         daemon = MHD_start_daemon(MHD_USE_DEBUG, HTTP_BLERG_PORT, NULL, NULL, &ahc_derp, NULL, MHD_OPTION_END);
 674         if (daemon == NULL) {
 675                 fprintf(stderr, "Could not start web server\n");
 676                 return 1;
 677         }
 678
 679         while (1) {
 680                 FD_ZERO(&rs); FD_ZERO(&ws); FD_ZERO(&es);
 681                 if (MHD_get_fdset(daemon, &rs, &ws, &es, &max) != MHD_YES) {
 682                         fprintf(stderr, "Fatal error getting fd sets\n");
 683                         break;
 684                 }
 685                 select(max + 1, &rs, &ws, &es, NULL);
 686                 MHD_run(daemon);
 687         }
 688         MHD_stop_daemon(daemon);
 689         return 0;
 690 }