cgi/cgi_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 <string.h>
   6 #include <stdlib.h>
   7 #include <cgi-util.h>
   8 #include <yajl/yajl_gen.h>
   9 #include "database.h"
  10 #include "tags.h"
  11 #include "auth.h"
  12 #include "subscription.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 int check_auth(const char *username) {
  20         if (username == NULL || username[0] == 0) {
  21                 respond_403();
  22                 return 0;
  23         }
  24
  25         const char *given_token = cgi_getcookie("auth");
  26         if (!auth_check_token(username, given_token)) {
  27                 respond_403();
  28                 return 0;
  29         }
  30         return 1;
  31 }
  32
  33
  34 void respond_for_range(struct blerg *b, uint64_t from, uint64_t to) {
  35         const unsigned char *ybuf;
  36         unsigned int len;
  37         uint64_t i;
  38         yajl_gen g;
  39         uint64_t record_count = blerg_get_record_count(b);
  40
  41         printf("Content-type: application/json\r\n\r\n");
  42
  43         if (from > to || from >= record_count || to >= record_count || to - from > 99) {
  44                 respond_JSON_Failure();
  45                 return;
  46         }
  47
  48         g = yajl_gen_alloc(&yajl_c, NULL);
  49         yajl_gen_array_open(g);
  50
  51         for (i = to; i != from - 1; i--) {
  52                 json_generate_one_record(g, NULL, b, i, 0);
  53                 yajl_gen_get_buf(g, &ybuf, &len);
  54                 fwrite(ybuf, len, 1, stdout);
  55                 yajl_gen_clear(g);
  56         }
  57
  58         yajl_gen_array_close(g);
  59         yajl_gen_get_buf(g, &ybuf, &len);
  60         fwrite(ybuf, len, 1, stdout);
  61         yajl_gen_free(g);
  62 }
  63
  64 void respond_blergref_list(struct blergref * results, int i) {
  65         const unsigned char *ybuf;
  66         unsigned int len;
  67         struct blerg *b;
  68         yajl_gen g;
  69
  70         i--;
  71
  72         printf("Content-type: application/json\r\n\r\n");
  73         g = yajl_gen_alloc(&yajl_c, NULL);
  74
  75         yajl_gen_array_open(g);
  76
  77         while (i >= 0) {
  78                 b = blerg_open(results[i].author);
  79                 if (b != NULL) {
  80                         json_generate_one_record(g, results[i].author, b, results[i].record, 0);
  81                         blerg_close(b);
  82                 }
  83                 yajl_gen_get_buf(g, &ybuf, &len);
  84                 fwrite(ybuf, len, 1, stdout);
  85                 yajl_gen_clear(g);
  86
  87                 i--;
  88         }
  89
  90         yajl_gen_array_close(g);
  91         yajl_gen_get_buf(g, &ybuf, &len);
  92         fwrite(ybuf, len, 1, stdout);
  93         yajl_gen_free(g);
  94 }
  95
  96 int main(int argc, char *argv[]) {
  97         char *path;
  98         char *request_method;
  99         int ret, len;
 100         struct url_info info;
 101         char *data;
 102
 103         if (cgi_init() != CGIERR_NONE)
 104                 exit(0);
 105
 106         path = getenv("PATH_INFO");
 107         if (path == NULL) {
 108                 respond_404();
 109                 exit(0);
 110         }
 111         request_method = getenv("REQUEST_METHOD");
 112         if (request_method == NULL) {
 113                 fprintf(stderr, "Request method is null!?\n");
 114                 exit(0);
 115         }
 116
 117         if (strncmp(path, "/get", 4) == 0 && strlen(path) > 4) {
 118                 if (strncmp(request_method, "GET", 4) != 0) {
 119                         respond_405();
 120                         exit(0);
 121                 }
 122
 123                 if (path[4] != '/') {
 124                         respond_404();
 125                         exit(0);
 126                 }
 127
 128                 ret = parse_url_info(path + 5, &info);
 129                 if ((ret & URL_INFO_NAME) == 0) {
 130                         respond_404();
 131                         exit(0);
 132                 }
 133
 134                 if (!blerg_exists(info.name)) {
 135                         respond_404();
 136                         exit(0);
 137                 }
 138
 139                 struct blerg *b = blerg_open(info.name);
 140
 141                 if ((ret & URL_INFO_RECORD) && (ret & URL_INFO_RECORD_TO)) {
 142                         respond_for_range(b, info.record, info.record_to);
 143                 } else if (ret & URL_INFO_RECORD) {
 144                         ret = blerg_fetch(b, info.record, &data, &len);
 145
 146                         if (ret == 0) {
 147                                 respond_404();
 148                                 exit(0);
 149                         }
 150                         respond_simple_data(data, len);
 151                 } else {
 152                         uint64_t record_count, from, to;
 153                         record_count = blerg_get_record_count(b);
 154                         if (record_count == 0) {
 155                                 respond_simple_data("[]", 2);
 156                         } else {
 157                                 to = record_count - 1;
 158                                 from = (record_count > 50 ? to - 49 : 0);
 159                                 respond_for_range(b, from, to);
 160                         }
 161                 }
 162
 163                 blerg_close(b);
 164         } else if (strncmp(path, "/tag", 4) == 0 && strlen(path) > 4) {
 165                 if (strcmp(request_method, "GET") != 0) {
 166                         respond_405();
 167                         exit(0);
 168                 }
 169
 170                 if (path[4] != '/') {
 171                         respond_404();
 172                         exit(0);
 173                 }
 174
 175                 ret = parse_url_info(path + 5, &info);
 176                 if ((ret & URL_INFO_NAME) == 0) {
 177                         respond_404();
 178                         exit(0);
 179                 }
 180
 181                 if (info.name[0] == 'H')
 182                         info.name[0] = '#';
 183                 if (!tag_exists(info.name)) {
 184                         respond_404();
 185                         exit(0);
 186                 }
 187
 188                 int recs = 50;
 189                 struct blergref *taglist = tag_list(info.name, 0, &recs, -1);
 190
 191                 if (recs == 0) {
 192                         respond_simple_data("[]", 2);
 193                 } else {
 194                         respond_blergref_list(taglist, recs);
 195                 }
 196         } else if (strncmp(path, "/put", 4) == 0) {
 197                 if (strcmp(request_method, "POST") != 0) {
 198                         respond_405();
 199                         exit(0);
 200                 }
 201
 202                 const char *username = cgi_getentrystr("username");
 203                 if (!check_auth(username))
 204                         exit(0);
 205
 206                 if (path[4] == '/') {
 207                         respond_404();
 208                         exit(0);
 209                 }
 210
 211                 const char *data = cgi_getentrystr("data");
 212                 if (data == NULL || data[0] == 0) {
 213                         respond_JSON_Failure();
 214                         exit(0);
 215                 }
 216
 217                 struct blerg *b = blerg_open(username);
 218                 if (b == NULL) {
 219                         respond_JSON_Failure();
 220                         exit(0);
 221                 }
 222                 ret = blerg_store(b, data, strlen(data));
 223                 blerg_close(b);
 224                 if (ret == -1) {
 225                         respond_JSON_Failure();
 226                         exit(0);
 227                 }
 228
 229                 respond_JSON_Success();
 230         } else if (strncmp(path, "/info", 5) == 0) {
 231                 if (strcmp(request_method, "GET") != 0) {
 232                         respond_405();
 233                         exit(0);
 234                 }
 235
 236                 if (path[5] != '/') {
 237                         respond_404();
 238                         exit(0);
 239                 }
 240
 241                 ret = parse_url_info(path + 6, &info);
 242                 if ((ret & URL_INFO_NAME) == 0) {
 243                         respond_404();
 244                         exit(0);
 245                 }
 246
 247                 if (!blerg_exists(info.name)) {
 248                         respond_404();
 249                         exit(0);
 250                 }
 251
 252                 struct blerg *b = blerg_open(info.name);
 253                 uint64_t record_count = blerg_get_record_count(b);
 254                 blerg_close(b);
 255
 256                 char number[21];
 257                 yajl_gen g = yajl_gen_alloc(&yajl_c, NULL);
 258                 yajl_gen_map_open(g);
 259                 yajl_gen_string(g, "record_count", 12);
 260                 snprintf(number, 21, "%llu", record_count);
 261                 yajl_gen_string(g, number, strlen(number));
 262                 yajl_gen_map_close(g);
 263
 264                 const unsigned char *ybuf;
 265                 yajl_gen_get_buf(g, &ybuf, &len);
 266
 267                 printf("Content-type: application/json\r\n");
 268                 printf("Content-length: %d\r\n\r\n", len);
 269                 fwrite(ybuf, len, 1, stdout);
 270
 271                 yajl_gen_free(g);
 272         } else if (strncmp(path, "/create", 8) == 0) {
 273                 if (strcmp(request_method, "POST") != 0) {
 274                         respond_405();
 275                         exit(0);
 276                 }
 277
 278                 const char *username = cgi_getentrystr("username");
 279                 const char *password = cgi_getentrystr("password");
 280                 if (username == NULL || username[0] == 0 ||
 281                     password == NULL || password[0] == 0) {
 282                         respond_JSON_Failure();
 283                         exit(0);
 284                 }
 285
 286                 if (blerg_exists(username)) {
 287                         respond_JSON_Failure();
 288                         exit(0);
 289                 }
 290
 291                 struct blerg *b = blerg_open(username);
 292                 blerg_close(b);
 293                 auth_set_password(username, password);
 294
 295                 respond_JSON_Success();
 296         } else if (strncmp(path, "/login", 7) == 0) {
 297                 if (strcmp(request_method, "POST") != 0) {
 298                         respond_405();
 299                         exit(0);
 300                 }
 301
 302                 const char *username = cgi_getentrystr("username");
 303                 const char *password = cgi_getentrystr("password");
 304                 if (username == NULL || username[0] == 0 ||
 305                     password == NULL || password[0] == 0) {
 306                         respond_JSON_Failure();
 307                         exit(0);
 308                 }
 309
 310                 if (!auth_login(username, password)) {
 311                         respond_JSON_Failure();
 312                         exit(0);
 313                 }
 314
 315                 char *token = auth_get_token(username);
 316                 printf("Set-Cookie: auth=%s\r\n", token);
 317                 free(token);
 318
 319                 respond_JSON_Success();
 320         } else if (strncmp(path, "/logout", 8) == 0) {
 321                 if (strcmp(request_method, "POST") != 0) {
 322                         respond_405();
 323                         exit(0);
 324                 }
 325
 326                 const char *username = cgi_getentrystr("username");
 327                 if (!check_auth(username))
 328                         exit(0);
 329
 330                 auth_logout(username);
 331                 respond_JSON_Success();
 332         } else if (strncmp(path, "/subscribe", 10) == 0 || strncmp(path, "/unsubscribe", 12) == 0) {
 333                 const char *username = cgi_getentrystr("username");
 334                 if (!check_auth(username))
 335                         exit(0);
 336
 337                 if (path[1] == 'u') {
 338                         if (path[12] != '/') {
 339                                 respond_404();
 340                                 exit(0);
 341                         }
 342
 343                         ret = parse_url_info(path + 13, &info);
 344                         if ((ret & URL_INFO_NAME) == 0) {
 345                                 respond_404();
 346                                 exit(0);
 347                         }
 348
 349                         subscription_remove(username, info.name);
 350                 } else {
 351                         if (path[10] != '/') {
 352                                 respond_404();
 353                                 exit(0);
 354                         }
 355
 356                         ret = parse_url_info(path + 11, &info);
 357                         if ((ret & URL_INFO_NAME) == 0) {
 358                                 respond_404();
 359                                 exit(0);
 360                         }
 361
 362                         subscription_add(username, info.name);
 363                 }
 364                 respond_JSON_Success();
 365         } else if (strncmp(path, "/feed", 6) == 0) {
 366                 const char *username = cgi_getentrystr("username");
 367                 if (!check_auth(username))
 368                         exit(0);
 369
 370                 int recs = 50;
 371                 struct blergref *feedlist = subscription_list(username, 0, &recs, -1);
 372
 373                 if (recs == 0) {
 374                         respond_simple_data("[]", 2);
 375                 } else {
 376                         respond_blergref_list(feedlist, recs);
 377                 }
 378         } else if (strncmp(path, "/feedinfo", 9) == 0) {
 379                 const char *username = cgi_getentrystr("username");
 380                 if (!check_auth(username))
 381                         exit(0);
 382
 383                 if (path[9] != '/') {
 384                         respond_404();
 385                         exit(0);
 386                 }
 387
 388                 ret = parse_url_info(path + 10, &info);
 389                 if ((ret & URL_INFO_NAME) == 0) {
 390                         respond_404();
 391                         exit(0);
 392                 }
 393
 394                 yajl_gen g = yajl_gen_alloc(&yajl_c, NULL);
 395                 yajl_gen_map_open(g);
 396                 yajl_gen_string(g, "subscribed", 10);
 397                 yajl_gen_bool(g, is_subscribed(username, info.name));
 398                 yajl_gen_map_close(g);
 399
 400                 const unsigned char *ybuf;
 401                 yajl_gen_get_buf(g, &ybuf, &len);
 402
 403                 printf("Content-type: application/json\r\n");
 404                 printf("Content-length: %d\r\n\r\n", len);
 405                 fwrite(ybuf, len, 1, stdout);
 406
 407                 yajl_gen_free(g);
 408         } else {
 409                 respond_404();
 410                 exit(0);
 411         }
 412
 413         cgi_quit();
 414 }