git.oblomov.eu Git - git/blob - http.c

   1 #include "http.h"
   2
   3 int data_received;
   4 int active_requests;
   5
   6 #ifdef USE_CURL_MULTI
   7 static int max_requests = -1;
   8 static CURLM *curlm;
   9 #endif
  10 #ifndef NO_CURL_EASY_DUPHANDLE
  11 static CURL *curl_default;
  12 #endif
  13 char curl_errorstr[CURL_ERROR_SIZE];
  14
  15 static int curl_ssl_verify = -1;
  16 static const char *ssl_cert;
  17 #if LIBCURL_VERSION_NUM >= 0x070902
  18 static const char *ssl_key;
  19 #endif
  20 #if LIBCURL_VERSION_NUM >= 0x070908
  21 static const char *ssl_capath;
  22 #endif
  23 static const char *ssl_cainfo;
  24 static long curl_low_speed_limit = -1;
  25 static long curl_low_speed_time = -1;
  26 static int curl_ftp_no_epsv;
  27 static const char *curl_http_proxy;
  28 static char *user_name, *user_pass;
  29
  30 static struct curl_slist *pragma_header;
  31
  32 static struct active_request_slot *active_queue_head;
  33
  34 size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  35 {
  36         size_t size = eltsize * nmemb;
  37         struct buffer *buffer = buffer_;
  38
  39         if (size > buffer->buf.len - buffer->posn)
  40                 size = buffer->buf.len - buffer->posn;
  41         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  42         buffer->posn += size;
  43
  44         return size;
  45 }
  46
  47 #ifndef NO_CURL_IOCTL
  48 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  49 {
  50         struct buffer *buffer = clientp;
  51
  52         switch (cmd) {
  53         case CURLIOCMD_NOP:
  54                 return CURLIOE_OK;
  55
  56         case CURLIOCMD_RESTARTREAD:
  57                 buffer->posn = 0;
  58                 return CURLIOE_OK;
  59
  60         default:
  61                 return CURLIOE_UNKNOWNCMD;
  62         }
  63 }
  64 #endif
  65
  66 size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  67 {
  68         size_t size = eltsize * nmemb;
  69         struct strbuf *buffer = buffer_;
  70
  71         strbuf_add(buffer, ptr, size);
  72         data_received++;
  73         return size;
  74 }
  75
  76 size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
  77 {
  78         data_received++;
  79         return eltsize * nmemb;
  80 }
  81
  82 static void finish_active_slot(struct active_request_slot *slot);
  83
  84 #ifdef USE_CURL_MULTI
  85 static void process_curl_messages(void)
  86 {
  87         int num_messages;
  88         struct active_request_slot *slot;
  89         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
  90
  91         while (curl_message != NULL) {
  92                 if (curl_message->msg == CURLMSG_DONE) {
  93                         int curl_result = curl_message->data.result;
  94                         slot = active_queue_head;
  95                         while (slot != NULL &&
  96                                slot->curl != curl_message->easy_handle)
  97                                 slot = slot->next;
  98                         if (slot != NULL) {
  99                                 curl_multi_remove_handle(curlm, slot->curl);
 100                                 slot->curl_result = curl_result;
 101                                 finish_active_slot(slot);
 102                         } else {
 103                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 104                         }
 105                 } else {
 106                         fprintf(stderr, "Unknown CURL message received: %d\n",
 107                                 (int)curl_message->msg);
 108                 }
 109                 curl_message = curl_multi_info_read(curlm, &num_messages);
 110         }
 111 }
 112 #endif
 113
 114 static int http_options(const char *var, const char *value, void *cb)
 115 {
 116         if (!strcmp("http.sslverify", var)) {
 117                 curl_ssl_verify = git_config_bool(var, value);
 118                 return 0;
 119         }
 120         if (!strcmp("http.sslcert", var))
 121                 return git_config_string(&ssl_cert, var, value);
 122 #if LIBCURL_VERSION_NUM >= 0x070902
 123         if (!strcmp("http.sslkey", var))
 124                 return git_config_string(&ssl_key, var, value);
 125 #endif
 126 #if LIBCURL_VERSION_NUM >= 0x070908
 127         if (!strcmp("http.sslcapath", var))
 128                 return git_config_string(&ssl_capath, var, value);
 129 #endif
 130         if (!strcmp("http.sslcainfo", var))
 131                 return git_config_string(&ssl_cainfo, var, value);
 132 #ifdef USE_CURL_MULTI
 133         if (!strcmp("http.maxrequests", var)) {
 134                 max_requests = git_config_int(var, value);
 135                 return 0;
 136         }
 137 #endif
 138         if (!strcmp("http.lowspeedlimit", var)) {
 139                 curl_low_speed_limit = (long)git_config_int(var, value);
 140                 return 0;
 141         }
 142         if (!strcmp("http.lowspeedtime", var)) {
 143                 curl_low_speed_time = (long)git_config_int(var, value);
 144                 return 0;
 145         }
 146
 147         if (!strcmp("http.noepsv", var)) {
 148                 curl_ftp_no_epsv = git_config_bool(var, value);
 149                 return 0;
 150         }
 151         if (!strcmp("http.proxy", var))
 152                 return git_config_string(&curl_http_proxy, var, value);
 153
 154         /* Fall back on the default ones */
 155         return git_default_config(var, value, cb);
 156 }
 157
 158 static void init_curl_http_auth(CURL *result)
 159 {
 160         if (user_name) {
 161                 struct strbuf up = STRBUF_INIT;
 162                 if (!user_pass)
 163                         user_pass = xstrdup(getpass("Password: "));
 164                 strbuf_addf(&up, "%s:%s", user_name, user_pass);
 165                 curl_easy_setopt(result, CURLOPT_USERPWD,
 166                                  strbuf_detach(&up, NULL));
 167         }
 168 }
 169
 170 static CURL *get_curl_handle(void)
 171 {
 172         CURL *result = curl_easy_init();
 173
 174         if (!curl_ssl_verify) {
 175                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 176                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 177         } else {
 178                 /* Verify authenticity of the peer's certificate */
 179                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 180                 /* The name in the cert must match whom we tried to connect */
 181                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 182         }
 183
 184 #if LIBCURL_VERSION_NUM >= 0x070907
 185         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 186 #endif
 187
 188         init_curl_http_auth(result);
 189
 190         if (ssl_cert != NULL)
 191                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 192 #if LIBCURL_VERSION_NUM >= 0x070902
 193         if (ssl_key != NULL)
 194                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 195 #endif
 196 #if LIBCURL_VERSION_NUM >= 0x070908
 197         if (ssl_capath != NULL)
 198                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 199 #endif
 200         if (ssl_cainfo != NULL)
 201                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 202         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 203
 204         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 205                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 206                                  curl_low_speed_limit);
 207                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 208                                  curl_low_speed_time);
 209         }
 210
 211         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 212
 213         if (getenv("GIT_CURL_VERBOSE"))
 214                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 215
 216         curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT);
 217
 218         if (curl_ftp_no_epsv)
 219                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 220
 221         if (curl_http_proxy)
 222                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 223
 224         return result;
 225 }
 226
 227 static void http_auth_init(const char *url)
 228 {
 229         char *at, *colon, *cp, *slash;
 230         int len;
 231
 232         cp = strstr(url, "://");
 233         if (!cp)
 234                 return;
 235
 236         /*
 237          * Ok, the URL looks like "proto://something".  Which one?
 238          * "proto://<user>:<pass>@<host>/...",
 239          * "proto://<user>@<host>/...", or just
 240          * "proto://<host>/..."?
 241          */
 242         cp += 3;
 243         at = strchr(cp, '@');
 244         colon = strchr(cp, ':');
 245         slash = strchrnul(cp, '/');
 246         if (!at || slash <= at)
 247                 return; /* No credentials */
 248         if (!colon || at <= colon) {
 249                 /* Only username */
 250                 len = at - cp;
 251                 user_name = xmalloc(len + 1);
 252                 memcpy(user_name, cp, len);
 253                 user_name[len] = '\0';
 254                 user_pass = NULL;
 255         } else {
 256                 len = colon - cp;
 257                 user_name = xmalloc(len + 1);
 258                 memcpy(user_name, cp, len);
 259                 user_name[len] = '\0';
 260                 len = at - (colon + 1);
 261                 user_pass = xmalloc(len + 1);
 262                 memcpy(user_pass, colon + 1, len);
 263                 user_pass[len] = '\0';
 264         }
 265 }
 266
 267 static void set_from_env(const char **var, const char *envname)
 268 {
 269         const char *val = getenv(envname);
 270         if (val)
 271                 *var = val;
 272 }
 273
 274 void http_init(struct remote *remote)
 275 {
 276         char *low_speed_limit;
 277         char *low_speed_time;
 278
 279         git_config(http_options, NULL);
 280
 281         curl_global_init(CURL_GLOBAL_ALL);
 282
 283         if (remote && remote->http_proxy)
 284                 curl_http_proxy = xstrdup(remote->http_proxy);
 285
 286         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 287
 288 #ifdef USE_CURL_MULTI
 289         {
 290                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 291                 if (http_max_requests != NULL)
 292                         max_requests = atoi(http_max_requests);
 293         }
 294
 295         curlm = curl_multi_init();
 296         if (curlm == NULL) {
 297                 fprintf(stderr, "Error creating curl multi handle.\n");
 298                 exit(1);
 299         }
 300 #endif
 301
 302         if (getenv("GIT_SSL_NO_VERIFY"))
 303                 curl_ssl_verify = 0;
 304
 305         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 306 #if LIBCURL_VERSION_NUM >= 0x070902
 307         set_from_env(&ssl_key, "GIT_SSL_KEY");
 308 #endif
 309 #if LIBCURL_VERSION_NUM >= 0x070908
 310         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 311 #endif
 312         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 313
 314         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 315         if (low_speed_limit != NULL)
 316                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 317         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 318         if (low_speed_time != NULL)
 319                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 320
 321         if (curl_ssl_verify == -1)
 322                 curl_ssl_verify = 1;
 323
 324 #ifdef USE_CURL_MULTI
 325         if (max_requests < 1)
 326                 max_requests = DEFAULT_MAX_REQUESTS;
 327 #endif
 328
 329         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 330                 curl_ftp_no_epsv = 1;
 331
 332         if (remote && remote->url && remote->url[0])
 333                 http_auth_init(remote->url[0]);
 334
 335 #ifndef NO_CURL_EASY_DUPHANDLE
 336         curl_default = get_curl_handle();
 337 #endif
 338 }
 339
 340 void http_cleanup(void)
 341 {
 342         struct active_request_slot *slot = active_queue_head;
 343
 344         while (slot != NULL) {
 345                 struct active_request_slot *next = slot->next;
 346                 if (slot->curl != NULL) {
 347 #ifdef USE_CURL_MULTI
 348                         curl_multi_remove_handle(curlm, slot->curl);
 349 #endif
 350                         curl_easy_cleanup(slot->curl);
 351                 }
 352                 free(slot);
 353                 slot = next;
 354         }
 355         active_queue_head = NULL;
 356
 357 #ifndef NO_CURL_EASY_DUPHANDLE
 358         curl_easy_cleanup(curl_default);
 359 #endif
 360
 361 #ifdef USE_CURL_MULTI
 362         curl_multi_cleanup(curlm);
 363 #endif
 364         curl_global_cleanup();
 365
 366         curl_slist_free_all(pragma_header);
 367         pragma_header = NULL;
 368
 369         if (curl_http_proxy) {
 370                 free((void *)curl_http_proxy);
 371                 curl_http_proxy = NULL;
 372         }
 373 }
 374
 375 struct active_request_slot *get_active_slot(void)
 376 {
 377         struct active_request_slot *slot = active_queue_head;
 378         struct active_request_slot *newslot;
 379
 380 #ifdef USE_CURL_MULTI
 381         int num_transfers;
 382
 383         /* Wait for a slot to open up if the queue is full */
 384         while (active_requests >= max_requests) {
 385                 curl_multi_perform(curlm, &num_transfers);
 386                 if (num_transfers < active_requests)
 387                         process_curl_messages();
 388         }
 389 #endif
 390
 391         while (slot != NULL && slot->in_use)
 392                 slot = slot->next;
 393
 394         if (slot == NULL) {
 395                 newslot = xmalloc(sizeof(*newslot));
 396                 newslot->curl = NULL;
 397                 newslot->in_use = 0;
 398                 newslot->next = NULL;
 399
 400                 slot = active_queue_head;
 401                 if (slot == NULL) {
 402                         active_queue_head = newslot;
 403                 } else {
 404                         while (slot->next != NULL)
 405                                 slot = slot->next;
 406                         slot->next = newslot;
 407                 }
 408                 slot = newslot;
 409         }
 410
 411         if (slot->curl == NULL) {
 412 #ifdef NO_CURL_EASY_DUPHANDLE
 413                 slot->curl = get_curl_handle();
 414 #else
 415                 slot->curl = curl_easy_duphandle(curl_default);
 416 #endif
 417         }
 418
 419         active_requests++;
 420         slot->in_use = 1;
 421         slot->local = NULL;
 422         slot->results = NULL;
 423         slot->finished = NULL;
 424         slot->callback_data = NULL;
 425         slot->callback_func = NULL;
 426         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 427         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 428         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 429         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 430         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 431         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 432         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 433
 434         return slot;
 435 }
 436
 437 int start_active_slot(struct active_request_slot *slot)
 438 {
 439 #ifdef USE_CURL_MULTI
 440         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 441         int num_transfers;
 442
 443         if (curlm_result != CURLM_OK &&
 444             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 445                 active_requests--;
 446                 slot->in_use = 0;
 447                 return 0;
 448         }
 449
 450         /*
 451          * We know there must be something to do, since we just added
 452          * something.
 453          */
 454         curl_multi_perform(curlm, &num_transfers);
 455 #endif
 456         return 1;
 457 }
 458
 459 #ifdef USE_CURL_MULTI
 460 struct fill_chain {
 461         void *data;
 462         int (*fill)(void *);
 463         struct fill_chain *next;
 464 };
 465
 466 static struct fill_chain *fill_cfg;
 467
 468 void add_fill_function(void *data, int (*fill)(void *))
 469 {
 470         struct fill_chain *new = xmalloc(sizeof(*new));
 471         struct fill_chain **linkp = &fill_cfg;
 472         new->data = data;
 473         new->fill = fill;
 474         new->next = NULL;
 475         while (*linkp)
 476                 linkp = &(*linkp)->next;
 477         *linkp = new;
 478 }
 479
 480 void fill_active_slots(void)
 481 {
 482         struct active_request_slot *slot = active_queue_head;
 483
 484         while (active_requests < max_requests) {
 485                 struct fill_chain *fill;
 486                 for (fill = fill_cfg; fill; fill = fill->next)
 487                         if (fill->fill(fill->data))
 488                                 break;
 489
 490                 if (!fill)
 491                         break;
 492         }
 493
 494         while (slot != NULL) {
 495                 if (!slot->in_use && slot->curl != NULL) {
 496                         curl_easy_cleanup(slot->curl);
 497                         slot->curl = NULL;
 498                 }
 499                 slot = slot->next;
 500         }
 501 }
 502
 503 void step_active_slots(void)
 504 {
 505         int num_transfers;
 506         CURLMcode curlm_result;
 507
 508         do {
 509                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 510         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 511         if (num_transfers < active_requests) {
 512                 process_curl_messages();
 513                 fill_active_slots();
 514         }
 515 }
 516 #endif
 517
 518 void run_active_slot(struct active_request_slot *slot)
 519 {
 520 #ifdef USE_CURL_MULTI
 521         long last_pos = 0;
 522         long current_pos;
 523         fd_set readfds;
 524         fd_set writefds;
 525         fd_set excfds;
 526         int max_fd;
 527         struct timeval select_timeout;
 528         int finished = 0;
 529
 530         slot->finished = &finished;
 531         while (!finished) {
 532                 data_received = 0;
 533                 step_active_slots();
 534
 535                 if (!data_received && slot->local != NULL) {
 536                         current_pos = ftell(slot->local);
 537                         if (current_pos > last_pos)
 538                                 data_received++;
 539                         last_pos = current_pos;
 540                 }
 541
 542                 if (slot->in_use && !data_received) {
 543                         max_fd = 0;
 544                         FD_ZERO(&readfds);
 545                         FD_ZERO(&writefds);
 546                         FD_ZERO(&excfds);
 547                         select_timeout.tv_sec = 0;
 548                         select_timeout.tv_usec = 50000;
 549                         select(max_fd, &readfds, &writefds,
 550                                &excfds, &select_timeout);
 551                 }
 552         }
 553 #else
 554         while (slot->in_use) {
 555                 slot->curl_result = curl_easy_perform(slot->curl);
 556                 finish_active_slot(slot);
 557         }
 558 #endif
 559 }
 560
 561 static void closedown_active_slot(struct active_request_slot *slot)
 562 {
 563         active_requests--;
 564         slot->in_use = 0;
 565 }
 566
 567 void release_active_slot(struct active_request_slot *slot)
 568 {
 569         closedown_active_slot(slot);
 570         if (slot->curl) {
 571 #ifdef USE_CURL_MULTI
 572                 curl_multi_remove_handle(curlm, slot->curl);
 573 #endif
 574                 curl_easy_cleanup(slot->curl);
 575                 slot->curl = NULL;
 576         }
 577 #ifdef USE_CURL_MULTI
 578         fill_active_slots();
 579 #endif
 580 }
 581
 582 static void finish_active_slot(struct active_request_slot *slot)
 583 {
 584         closedown_active_slot(slot);
 585         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 586
 587         if (slot->finished != NULL)
 588                 (*slot->finished) = 1;
 589
 590         /* Store slot results so they can be read after the slot is reused */
 591         if (slot->results != NULL) {
 592                 slot->results->curl_result = slot->curl_result;
 593                 slot->results->http_code = slot->http_code;
 594         }
 595
 596         /* Run callback if appropriate */
 597         if (slot->callback_func != NULL)
 598                 slot->callback_func(slot->callback_data);
 599 }
 600
 601 void finish_all_active_slots(void)
 602 {
 603         struct active_request_slot *slot = active_queue_head;
 604
 605         while (slot != NULL)
 606                 if (slot->in_use) {
 607                         run_active_slot(slot);
 608                         slot = active_queue_head;
 609                 } else {
 610                         slot = slot->next;
 611                 }
 612 }
 613
 614 static inline int needs_quote(int ch)
 615 {
 616         if (((ch >= 'A') && (ch <= 'Z'))
 617                         || ((ch >= 'a') && (ch <= 'z'))
 618                         || ((ch >= '0') && (ch <= '9'))
 619                         || (ch == '/')
 620                         || (ch == '-')
 621                         || (ch == '.'))
 622                 return 0;
 623         return 1;
 624 }
 625
 626 static inline int hex(int v)
 627 {
 628         if (v < 10)
 629                 return '0' + v;
 630         else
 631                 return 'A' + v - 10;
 632 }
 633
 634 static char *quote_ref_url(const char *base, const char *ref)
 635 {
 636         struct strbuf buf = STRBUF_INIT;
 637         const char *cp;
 638         int ch;
 639
 640         strbuf_addstr(&buf, base);
 641         if (buf.len && buf.buf[buf.len - 1] != '/' && *ref != '/')
 642                 strbuf_addstr(&buf, "/");
 643
 644         for (cp = ref; (ch = *cp) != 0; cp++)
 645                 if (needs_quote(ch))
 646                         strbuf_addf(&buf, "%%%02x", ch);
 647                 else
 648                         strbuf_addch(&buf, *cp);
 649
 650         return strbuf_detach(&buf, NULL);
 651 }
 652
 653 int http_fetch_ref(const char *base, struct ref *ref)
 654 {
 655         char *url;
 656         struct strbuf buffer = STRBUF_INIT;
 657         struct active_request_slot *slot;
 658         struct slot_results results;
 659         int ret;
 660
 661         url = quote_ref_url(base, ref->name);
 662         slot = get_active_slot();
 663         slot->results = &results;
 664         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
 665         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 666         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
 667         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 668         if (start_active_slot(slot)) {
 669                 run_active_slot(slot);
 670                 if (results.curl_result == CURLE_OK) {
 671                         strbuf_rtrim(&buffer);
 672                         if (buffer.len == 40)
 673                                 ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 674                         else if (!prefixcmp(buffer.buf, "ref: ")) {
 675                                 ref->symref = xstrdup(buffer.buf + 5);
 676                                 ret = 0;
 677                         } else
 678                                 ret = 1;
 679                 } else {
 680                         ret = error("Couldn't get %s for %s\n%s",
 681                                     url, ref->name, curl_errorstr);
 682                 }
 683         } else {
 684                 ret = error("Unable to start request");
 685         }
 686
 687         strbuf_release(&buffer);
 688         free(url);
 689         return ret;
 690 }