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_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) {
 178         struct auth_state *as = cls;
 179
 180         if (strncmp(key, "username", 9) == 0) {
 181                 if (size > 32) size = 32;
 182                 memcpy(as->username, data, size);
 183                 as->username[size] = 0;
 184         } else if (strncmp(key, "password", 9) == 0) {
 185                 if (size > 32) size = 32;
 186                 memcpy(as->password, data, size);
 187                 as->password[size] = 0;
 188         }
 189
 190         return MHD_YES;
 191 }
 192
 193 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) {
 194         struct put_state *ps = cls;
 195
 196         if (strncmp(key, "data", 5) == 0) {
 197                 if (ps->data == NULL) {
 198                         ps->data_size = size;
 199                         ps->data = malloc(size);
 200                 } else {
 201                         if (ps->data_size + size > MAX_RECORD_SIZE) {
 202                                 size = MAX_RECORD_SIZE - ps->data_size;
 203                         }
 204                         ps->data_size += size;
 205                         ps->data = realloc(ps->data, ps->data_size);
 206                 }
 207                 memcpy(ps->data + off, data, size);
 208                 if (ps->data_size == MAX_RECORD_SIZE)
 209                         return MHD_NO;
 210         } else if (strncmp(key, "username", 9) == 0) {
 211                 if (size > 32) size = 32;
 212                 memcpy(ps->username, data, size);
 213                 ps->username[size] = 0;
 214         }
 215
 216         return MHD_YES;
 217 }
 218
 219 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) {
 220         struct subscribe_state *ss = cls;
 221
 222         if (strncmp(key, "username", 9) == 0) {
 223                 if (size > 32) size = 32;
 224                 memcpy(ss->username, data, size);
 225                 ss->username[size] = 0;
 226         } else if (strncmp(key, "to", 3) == 0) {
 227                 if (size > 32) size = 32;
 228                 memcpy(ss->to, data, size);
 229                 ss->to[size] = 0;
 230         }
 231
 232         return MHD_YES;
 233 }
 234
 235 struct MHD_Response *create_response_for_range(struct blerg *b, uint64_t from, uint64_t to) {
 236         struct MHD_Response *response;
 237         struct get_state *gs = malloc(sizeof(struct get_state));
 238         gs->b = b;
 239
 240         uint64_t record_count = blerg_get_record_count(b);
 241
 242         if (from > to || from >= record_count || to >= record_count || to - from > 99) {
 243                 blerg_close(b);
 244                 free(gs);
 245                 return NULL;
 246         }
 247
 248         gs->entries = make_sequential_list(from, to);
 249         gs->i = to - from;
 250
 251         gs->g = yajl_gen_alloc(&yajl_c, NULL);
 252         gs->yoff = gs->done = 0;
 253
 254         response = MHD_create_response_from_callback(-1, 262144, &GET_generate_list, gs, &GET_generate_list_free);
 255
 256         return response;
 257 }
 258
 259 struct MHD_Response *create_blergref_response(struct blergref *results, uint64_t len) {
 260         struct blergref_state *bs = malloc(sizeof(struct blergref_state));
 261         bs->g = yajl_gen_alloc(&yajl_c, NULL);
 262         bs->results = results;
 263         bs->i = len - 1;
 264         bs->yoff = bs->done = 0;
 265
 266         return MHD_create_response_from_callback(-1, 262144, &GET_generate_blergref_list, bs, &GET_generate_blergref_list_free);
 267 }
 268
 269 int check_auth(struct MHD_Connection *connection, const char *method, const char *upload_data, size_t *upload_data_size, void **ptr) {
 270         struct auth_state *as = (struct auth_state *) *ptr;
 271         if (as == NULL) {
 272                 if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 273                         return respond_405(connection);
 274
 275                 as = malloc(sizeof(struct auth_state));
 276                 as->username[0] = as->password[0] = 0;
 277                 as->pp = MHD_create_post_processor(connection, 1024, &POST_auth_iterator, as);
 278                 *ptr = as;
 279                 return MHD_YES;
 280         }
 281
 282         if (*upload_data_size) {
 283                 MHD_post_process(as->pp, upload_data, *upload_data_size);
 284                 *upload_data_size = 0;
 285                 return MHD_YES;
 286         }
 287
 288         const char *given_token = MHD_lookup_connection_value(connection, MHD_COOKIE_KIND, "auth");
 289         if (!auth_check_token(as->username, given_token))
 290                 return respond_403(connection);
 291
 292         return MHD_NO;
 293 }
 294
 295 static int
 296 ahc_derp (void *cls, struct MHD_Connection *connection, const char *url, const char *method,
 297           const char *version, const char *upload_data, size_t *upload_data_size, void **ptr) {
 298         struct MHD_Response *response;
 299         int ret, len;
 300         struct url_info info;
 301         char *data;
 302
 303         if (strncmp(url, "/get", 4) == 0 && strlen(url) > 4) {
 304                 if (*ptr == NULL) {
 305                         if (strcmp(method, MHD_HTTP_METHOD_GET) != 0)
 306                                 return respond_405(connection);
 307
 308                         *ptr = (void *) 1;
 309                         return MHD_YES;
 310                 }
 311
 312                 if (url[4] != '/')
 313                         return respond_404(connection);
 314
 315                 ret = parse_url_info(url + 5, &info);
 316                 if ((ret & URL_INFO_NAME) == 0)
 317                         return respond_404(connection);
 318
 319                 if (!blerg_exists(info.name))
 320                         return respond_404(connection);
 321
 322                 *ptr == NULL;
 323
 324                 struct blerg *b = blerg_open(info.name);
 325
 326                 if ((ret & URL_INFO_RECORD) && (ret & URL_INFO_RECORD_TO)) {
 327                         response = create_response_for_range(b, info.record, info.record_to);
 328                 } else if (ret & URL_INFO_RECORD) {
 329                         ret = blerg_fetch(b, info.record, &data, &len);
 330                         blerg_close(b);
 331
 332                         if (ret == 0)
 333                                 return respond_404(connection);
 334                         response = MHD_create_response_from_data(len, data, MHD_YES, MHD_NO);
 335                 } else {
 336                         uint64_t record_count, from, to;
 337                         record_count = blerg_get_record_count(b);
 338                         if (record_count == 0) {
 339                                 blerg_close(b);
 340                                 response = MHD_create_response_from_data(2, "[]", MHD_NO, MHD_NO);
 341                         } else {
 342                                 to = record_count - 1;
 343                                 from = (record_count > 50 ? to - 49 : 0);
 344                                 response = create_response_for_range(b, from, to);
 345                         }
 346                 }
 347
 348                 if (response == NULL) {
 349                         blerg_close(b);
 350                         return respond_JSON_Failure(connection);
 351                 }
 352
 353                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 354                 MHD_destroy_response(response);
 355                 return ret;
 356         } else if (strncmp(url, "/tag", 4) == 0 && strlen(url) > 4) {
 357                 if (*ptr == NULL) {
 358                         if (strcmp(method, MHD_HTTP_METHOD_GET) != 0)
 359                                 return respond_405(connection);
 360
 361                         *ptr = (void *) 1;
 362                         return MHD_YES;
 363                 }
 364
 365                 if (url[4] != '/')
 366                         return respond_404(connection);
 367
 368                 ret = parse_url_info(url + 5, &info);
 369                 if ((ret & URL_INFO_NAME) == 0)
 370                         return respond_404(connection);
 371
 372                 if (info.name[0] == 'H')
 373                         info.name[0] = '#';
 374                 if (!tag_exists(info.name))
 375                         return respond_404(connection);
 376
 377                 int recs = 50;
 378                 struct blergref *taglist = tag_list(info.name, 0, &recs, -1);
 379
 380                 if (recs == 0) {
 381                         response = MHD_create_response_from_data(2, "[]", MHD_NO, MHD_NO);
 382                 } else {
 383                         response = create_blergref_response(taglist, recs);
 384                 }
 385
 386                 if (response == NULL)
 387                         return respond_JSON_Failure(connection);
 388
 389                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 390                 MHD_destroy_response(response);
 391
 392                 return ret;
 393         } else if (strncmp(url, "/put", 4) == 0) {
 394                 struct put_state *ps = (struct put_state *) *ptr;
 395                 if (*ptr == NULL) {
 396                         if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 397                                 return respond_405(connection);
 398
 399                         if (url[4] == '/')
 400                                 return respond_404(connection);
 401
 402                         *ptr = (void *) 1;
 403
 404                         struct put_state *ps = malloc(sizeof(struct put_state));
 405                         ps->data = NULL;
 406                         ps->data_size = 0;
 407                         ps->pp = MHD_create_post_processor(connection, 16384, &POST_put_iterator, ps);
 408                         ps->username[0] = 0;
 409                         *ptr = ps;
 410                         return MHD_YES;
 411                 }
 412
 413                 if (*upload_data_size) {
 414                         MHD_post_process(ps->pp, upload_data, *upload_data_size);
 415                         *upload_data_size = 0;
 416                         return MHD_YES;
 417                 }
 418
 419                 if (ps->data == NULL || ps->data_size == 0 || ps->username[0] == 0)
 420                         return respond_JSON_Failure(connection);
 421
 422                 const char *given_token = MHD_lookup_connection_value(connection, MHD_COOKIE_KIND, "auth");
 423                 if (!auth_check_token(ps->username, given_token))
 424                         return respond_JSON_Failure(connection);
 425
 426                 struct blerg *b = blerg_open(ps->username);
 427                 if (b == NULL)
 428                         return respond_JSON_Failure(connection);
 429                 ret = blerg_store(b, ps->data, ps->data_size);
 430                 blerg_close(b);
 431                 if (ret == -1)
 432                         return respond_JSON_Failure(connection);
 433
 434                 MHD_destroy_post_processor(ps->pp);
 435                 free(ps->data);
 436                 free(ps);
 437                 *ptr = NULL;
 438
 439                 return respond_JSON_Success(connection);
 440         } else if (strncmp(url, "/info", 5) == 0) {
 441                 if (*ptr == NULL) {
 442                         *ptr = (void *) 1;
 443
 444                         if (strcmp(method, MHD_HTTP_METHOD_GET) != 0)
 445                                 return respond_405(connection);
 446                         return MHD_YES;
 447                 }
 448
 449
 450                 if (url[5] != '/')
 451                         return respond_404(connection);
 452
 453                 ret = parse_url_info(url + 6, &info);
 454                 if ((ret & URL_INFO_NAME) == 0)
 455                         return respond_404(connection);
 456
 457                 if (!blerg_exists(info.name))
 458                         return respond_404(connection);
 459
 460                 *ptr == NULL;
 461
 462                 struct blerg *b = blerg_open(info.name);
 463                 uint64_t record_count = blerg_get_record_count(b);
 464                 blerg_close(b);
 465
 466                 char number[21];
 467                 yajl_gen g = yajl_gen_alloc(&yajl_c, NULL);
 468                 yajl_gen_map_open(g);
 469                 yajl_gen_string(g, "record_count", 12);
 470                 snprintf(number, 21, "%llu", record_count);
 471                 yajl_gen_string(g, number, strlen(number));
 472                 yajl_gen_map_close(g);
 473
 474                 const unsigned char *ybuf;
 475                 yajl_gen_get_buf(g, &ybuf, &len);
 476
 477                 response = MHD_create_response_from_data(len, (void *)ybuf, MHD_NO, MHD_YES);
 478                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 479                 MHD_destroy_response(response);
 480
 481                 yajl_gen_free(g);
 482
 483                 return ret;
 484         } else if (strncmp(url, "/create", 8) == 0) {
 485                 struct auth_state *as = (struct auth_state *) *ptr;
 486
 487                 if (as == NULL) {
 488                         if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 489                                 return respond_405(connection);
 490
 491                         struct auth_state *as = malloc(sizeof(struct auth_state));
 492                         as->username[0] = as->password[0] = 0;
 493                         as->pp = MHD_create_post_processor(connection, 1024, &POST_auth_iterator, as);
 494                         *ptr = as;
 495                         return MHD_YES;
 496                 }
 497
 498                 if (*upload_data_size) {
 499                         MHD_post_process(as->pp, upload_data, *upload_data_size);
 500                         *upload_data_size = 0;
 501                         return MHD_YES;
 502                 }
 503
 504                 if (as->username[0] == 0 || as->password[0] == 0)
 505                         return respond_JSON_Failure(connection);
 506
 507                 if (blerg_exists(as->username))
 508                         return respond_JSON_Failure(connection);
 509
 510                 struct blerg *b = blerg_open(as->username);
 511                 blerg_close(b);
 512                 auth_set_password(as->username, as->password);
 513
 514                 MHD_destroy_post_processor(as->pp);
 515                 free(as);
 516                 *ptr = NULL;
 517
 518                 return respond_JSON_Success(connection);
 519         } else if (strncmp(url, "/login", 7) == 0) {
 520                 struct auth_state *as = (struct auth_state *) *ptr;
 521
 522                 if (as == NULL) {
 523                         if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 524                                 return respond_405(connection);
 525
 526                         struct auth_state *as = malloc(sizeof(struct auth_state));
 527                         as->username[0] = as->password[0] = 0;
 528                         as->pp = MHD_create_post_processor(connection, 1024, &POST_auth_iterator, as);
 529                         *ptr = as;
 530                         return MHD_YES;
 531                 }
 532
 533                 if (*upload_data_size) {
 534                         MHD_post_process(as->pp, upload_data, *upload_data_size);
 535                         *upload_data_size = 0;
 536                         return MHD_YES;
 537                 }
 538
 539                 if (as->username[0] == 0 || as->password[0] == 0)
 540                         return respond_JSON_Failure(connection);
 541
 542                 if (!auth_login(as->username, as->password))
 543                         return respond_JSON_Failure(connection);
 544
 545                 response = MHD_create_response_from_data(strlen(JSON_SUCCESS), JSON_SUCCESS, MHD_NO, MHD_NO);
 546
 547                 char *token = auth_get_token(as->username);
 548                 data = malloc(512);
 549                 snprintf(data, 512, "auth=%s", token);
 550                 MHD_add_response_header(response, "Set-Cookie", data);
 551                 free(token);
 552                 free(data);
 553
 554                 MHD_destroy_post_processor(as->pp);
 555                 free(as);
 556                 *ptr = NULL;
 557
 558                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 559                 MHD_destroy_response(response);
 560
 561                 return ret;
 562         } else if (strncmp(url, "/logout", 8) == 0) {
 563                 struct auth_state *as = (struct auth_state *) *ptr;
 564
 565                 if (as == NULL) {
 566                         if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 567                                 return respond_405(connection);
 568
 569                         struct auth_state *as = malloc(sizeof(struct auth_state));
 570                         as->username[0] = as->password[0] = 0;
 571                         as->pp = MHD_create_post_processor(connection, 1024, &POST_auth_iterator, as);
 572                         *ptr = as;
 573                         return MHD_YES;
 574                 }
 575
 576                 if (*upload_data_size) {
 577                         MHD_post_process(as->pp, upload_data, *upload_data_size);
 578                         *upload_data_size = 0;
 579                         return MHD_YES;
 580                 }
 581
 582                 const char *given_token = MHD_lookup_connection_value(connection, MHD_COOKIE_KIND, "auth");
 583                 if (auth_check_token(as->username, given_token)) {
 584                         auth_logout(as->username);
 585                         return respond_JSON_Success(connection);
 586                 } else {
 587                         return respond_JSON_Failure(connection);
 588                 }
 589         } else if (strncmp(url, "/subscribe", 11) == 0 || strncmp(url, "/unsubscribe", 13) == 0) {
 590                 struct subscribe_state *ss = (struct subscribe_state *) *ptr;
 591
 592                 if (ss == NULL) {
 593                         if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 594                                 return respond_405(connection);
 595
 596                         struct subscribe_state *ss = malloc(sizeof(struct subscribe_state));
 597                         ss->username[0] = ss->to[0] = 0;
 598                         ss->pp = MHD_create_post_processor(connection, 1024, &POST_subscribe_iterator, ss);
 599                         *ptr = ss;
 600                         return MHD_YES;
 601                 }
 602
 603                 if (*upload_data_size) {
 604                         MHD_post_process(ss->pp, upload_data, *upload_data_size);
 605                         *upload_data_size = 0;
 606                         return MHD_YES;
 607                 }
 608
 609                 const char *given_token = MHD_lookup_connection_value(connection, MHD_COOKIE_KIND, "auth");
 610                 if (auth_check_token(ss->username, given_token)) {
 611                         if (url[1] == 'u') {
 612                                 subscription_remove(ss->username, ss->to);
 613                         } else {
 614                                 subscription_add(ss->username, ss->to);
 615                         }
 616                         return respond_JSON_Success(connection);
 617                 } else {
 618                         return respond_JSON_Failure(connection);
 619                 }
 620         } else if (strncmp(url, "/feed", 6) == 0) {
 621                 struct auth_state *as = (struct auth_state *) *ptr;
 622
 623                 if (as == NULL) {
 624                         if (strcmp(method, MHD_HTTP_METHOD_POST) != 0)
 625                                 return respond_405(connection);
 626
 627                         struct auth_state *as = malloc(sizeof(struct auth_state));
 628                         as->username[0] = as->password[0] = 0;
 629                         as->pp = MHD_create_post_processor(connection, 1024, &POST_auth_iterator, as);
 630                         *ptr = as;
 631                         return MHD_YES;
 632                 }
 633
 634                 if (*upload_data_size) {
 635                         MHD_post_process(as->pp, upload_data, *upload_data_size);
 636                         *upload_data_size = 0;
 637                         return MHD_YES;
 638                 }
 639
 640                 const char *given_token = MHD_lookup_connection_value(connection, MHD_COOKIE_KIND, "auth");
 641                 if (auth_check_token(as->username, given_token)) {
 642                         int recs = 50;
 643                         struct blergref *feedlist = subscription_list(as->username, 0, &recs, -1);
 644
 645                         if (recs == 0) {
 646                                 response = MHD_create_response_from_data(2, "[]", MHD_NO, MHD_NO);
 647                         } else {
 648                                 response = create_blergref_response(feedlist, recs);
 649                         }
 650
 651                         if (response == NULL)
 652                                 return respond_JSON_Failure(connection);
 653
 654                         ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 655                         MHD_destroy_response(response);
 656
 657                         return ret;
 658                 } else {
 659                         return respond_JSON_Failure(connection);
 660                 }
 661         } else if (strncmp(url, "/feedinfo", 9) == 0) {
 662                 ret = check_auth(connection, method, upload_data, upload_data_size, ptr);
 663                 if (ret == MHD_YES)
 664                         return MHD_YES;
 665
 666                 struct auth_state *as = (struct auth_state *) *ptr;
 667
 668                 if (url[9] != '/')
 669                         return respond_404(connection);
 670
 671                 ret = parse_url_info(url + 10, &info);
 672                 if ((ret & URL_INFO_NAME) == 0)
 673                         return respond_404(connection);
 674
 675                 yajl_gen g = yajl_gen_alloc(&yajl_c, NULL);
 676                 yajl_gen_map_open(g);
 677                 yajl_gen_string(g, "subscribed", 10);
 678                 yajl_gen_bool(g, is_subscribed(as->username, info.name));
 679                 yajl_gen_map_close(g);
 680
 681                 const unsigned char *ybuf;
 682                 yajl_gen_get_buf(g, &ybuf, &len);
 683
 684                 response = MHD_create_response_from_data(len, (void *)ybuf, MHD_NO, MHD_YES);
 685                 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
 686                 MHD_destroy_response(response);
 687
 688                 yajl_gen_free(g);
 689                 free(as);
 690
 691                 return ret;
 692         } else {
 693                 return respond_404(connection);
 694         }
 695 }
 696
 697
 698 int main(int argc, char *argv[]) {
 699         struct MHD_Daemon *daemon;
 700         fd_set rs, ws, es;
 701         int max;
 702
 703         init_responses();
 704
 705         daemon = MHD_start_daemon(MHD_USE_DEBUG, HTTP_BLERG_PORT, NULL, NULL, &ahc_derp, NULL, MHD_OPTION_END);
 706         if (daemon == NULL) {
 707                 fprintf(stderr, "Could not start web server\n");
 708                 return 1;
 709         }
 710
 711         while (1) {
 712                 FD_ZERO(&rs); FD_ZERO(&ws); FD_ZERO(&es);
 713                 if (MHD_get_fdset(daemon, &rs, &ws, &es, &max) != MHD_YES) {
 714                         fprintf(stderr, "Fatal error getting fd sets\n");
 715                         break;
 716                 }
 717                 select(max + 1, &rs, &ws, &es, NULL);
 718                 MHD_run(daemon);
 719         }
 720         MHD_stop_daemon(daemon);
 721         return 0;
 722 }