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

   1 #include "http.h"
   2 #include "pack.h"
   3 #include "sideband.h"
   4 #include "run-command.h"
   5
   6 int data_received;
   7 int active_requests;
   8 int http_is_verbose;
   9 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  10
  11 #if LIBCURL_VERSION_NUM >= 0x070a06
  12 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  13 #endif
  14
  15 static int min_curl_sessions = 1;
  16 static int curl_session_count;
  17 #ifdef USE_CURL_MULTI
  18 static int max_requests = -1;
  19 static CURLM *curlm;
  20 #endif
  21 #ifndef NO_CURL_EASY_DUPHANDLE
  22 static CURL *curl_default;
  23 #endif
  24
  25 #define PREV_BUF_SIZE 4096
  26 #define RANGE_HEADER_SIZE 30
  27
  28 char curl_errorstr[CURL_ERROR_SIZE];
  29
  30 static int curl_ssl_verify = -1;
  31 static const char *ssl_cert;
  32 #if LIBCURL_VERSION_NUM >= 0x070903
  33 static const char *ssl_key;
  34 #endif
  35 #if LIBCURL_VERSION_NUM >= 0x070908
  36 static const char *ssl_capath;
  37 #endif
  38 static const char *ssl_cainfo;
  39 static long curl_low_speed_limit = -1;
  40 static long curl_low_speed_time = -1;
  41 static int curl_ftp_no_epsv;
  42 static const char *curl_http_proxy;
  43 static char *user_name, *user_pass;
  44
  45 #if LIBCURL_VERSION_NUM >= 0x071700
  46 /* Use CURLOPT_KEYPASSWD as is */
  47 #elif LIBCURL_VERSION_NUM >= 0x070903
  48 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  49 #else
  50 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  51 #endif
  52
  53 static char *ssl_cert_password;
  54 static int ssl_cert_password_required;
  55
  56 static struct curl_slist *pragma_header;
  57 static struct curl_slist *no_pragma_header;
  58
  59 static struct active_request_slot *active_queue_head;
  60
  61 size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  62 {
  63         size_t size = eltsize * nmemb;
  64         struct buffer *buffer = buffer_;
  65
  66         if (size > buffer->buf.len - buffer->posn)
  67                 size = buffer->buf.len - buffer->posn;
  68         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  69         buffer->posn += size;
  70
  71         return size;
  72 }
  73
  74 #ifndef NO_CURL_IOCTL
  75 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  76 {
  77         struct buffer *buffer = clientp;
  78
  79         switch (cmd) {
  80         case CURLIOCMD_NOP:
  81                 return CURLIOE_OK;
  82
  83         case CURLIOCMD_RESTARTREAD:
  84                 buffer->posn = 0;
  85                 return CURLIOE_OK;
  86
  87         default:
  88                 return CURLIOE_UNKNOWNCMD;
  89         }
  90 }
  91 #endif
  92
  93 size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  94 {
  95         size_t size = eltsize * nmemb;
  96         struct strbuf *buffer = buffer_;
  97
  98         strbuf_add(buffer, ptr, size);
  99         data_received++;
 100         return size;
 101 }
 102
 103 size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 104 {
 105         data_received++;
 106         return eltsize * nmemb;
 107 }
 108
 109 #ifdef USE_CURL_MULTI
 110 static void process_curl_messages(void)
 111 {
 112         int num_messages;
 113         struct active_request_slot *slot;
 114         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 115
 116         while (curl_message != NULL) {
 117                 if (curl_message->msg == CURLMSG_DONE) {
 118                         int curl_result = curl_message->data.result;
 119                         slot = active_queue_head;
 120                         while (slot != NULL &&
 121                                slot->curl != curl_message->easy_handle)
 122                                 slot = slot->next;
 123                         if (slot != NULL) {
 124                                 curl_multi_remove_handle(curlm, slot->curl);
 125                                 slot->curl_result = curl_result;
 126                                 finish_active_slot(slot);
 127                         } else {
 128                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 129                         }
 130                 } else {
 131                         fprintf(stderr, "Unknown CURL message received: %d\n",
 132                                 (int)curl_message->msg);
 133                 }
 134                 curl_message = curl_multi_info_read(curlm, &num_messages);
 135         }
 136 }
 137 #endif
 138
 139 static int http_options(const char *var, const char *value, void *cb)
 140 {
 141         if (!strcmp("http.sslverify", var)) {
 142                 curl_ssl_verify = git_config_bool(var, value);
 143                 return 0;
 144         }
 145         if (!strcmp("http.sslcert", var))
 146                 return git_config_string(&ssl_cert, var, value);
 147 #if LIBCURL_VERSION_NUM >= 0x070903
 148         if (!strcmp("http.sslkey", var))
 149                 return git_config_string(&ssl_key, var, value);
 150 #endif
 151 #if LIBCURL_VERSION_NUM >= 0x070908
 152         if (!strcmp("http.sslcapath", var))
 153                 return git_config_string(&ssl_capath, var, value);
 154 #endif
 155         if (!strcmp("http.sslcainfo", var))
 156                 return git_config_string(&ssl_cainfo, var, value);
 157         if (!strcmp("http.sslcertpasswordprotected", var)) {
 158                 if (git_config_bool(var, value))
 159                         ssl_cert_password_required = 1;
 160                 return 0;
 161         }
 162         if (!strcmp("http.minsessions", var)) {
 163                 min_curl_sessions = git_config_int(var, value);
 164 #ifndef USE_CURL_MULTI
 165                 if (min_curl_sessions > 1)
 166                         min_curl_sessions = 1;
 167 #endif
 168                 return 0;
 169         }
 170 #ifdef USE_CURL_MULTI
 171         if (!strcmp("http.maxrequests", var)) {
 172                 max_requests = git_config_int(var, value);
 173                 return 0;
 174         }
 175 #endif
 176         if (!strcmp("http.lowspeedlimit", var)) {
 177                 curl_low_speed_limit = (long)git_config_int(var, value);
 178                 return 0;
 179         }
 180         if (!strcmp("http.lowspeedtime", var)) {
 181                 curl_low_speed_time = (long)git_config_int(var, value);
 182                 return 0;
 183         }
 184
 185         if (!strcmp("http.noepsv", var)) {
 186                 curl_ftp_no_epsv = git_config_bool(var, value);
 187                 return 0;
 188         }
 189         if (!strcmp("http.proxy", var))
 190                 return git_config_string(&curl_http_proxy, var, value);
 191
 192         if (!strcmp("http.postbuffer", var)) {
 193                 http_post_buffer = git_config_int(var, value);
 194                 if (http_post_buffer < LARGE_PACKET_MAX)
 195                         http_post_buffer = LARGE_PACKET_MAX;
 196                 return 0;
 197         }
 198
 199         /* Fall back on the default ones */
 200         return git_default_config(var, value, cb);
 201 }
 202
 203 static void init_curl_http_auth(CURL *result)
 204 {
 205         if (user_name) {
 206                 struct strbuf up = STRBUF_INIT;
 207                 if (!user_pass)
 208                         user_pass = xstrdup(git_getpass("Password: "));
 209                 strbuf_addf(&up, "%s:%s", user_name, user_pass);
 210                 curl_easy_setopt(result, CURLOPT_USERPWD,
 211                                  strbuf_detach(&up, NULL));
 212         }
 213 }
 214
 215 static int has_cert_password(void)
 216 {
 217         if (ssl_cert_password != NULL)
 218                 return 1;
 219         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 220                 return 0;
 221         /* Only prompt the user once. */
 222         ssl_cert_password_required = -1;
 223         ssl_cert_password = git_getpass("Certificate Password: ");
 224         if (ssl_cert_password != NULL) {
 225                 ssl_cert_password = xstrdup(ssl_cert_password);
 226                 return 1;
 227         } else
 228                 return 0;
 229 }
 230
 231 static CURL *get_curl_handle(void)
 232 {
 233         CURL *result = curl_easy_init();
 234
 235         if (!curl_ssl_verify) {
 236                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 237                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 238         } else {
 239                 /* Verify authenticity of the peer's certificate */
 240                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 241                 /* The name in the cert must match whom we tried to connect */
 242                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 243         }
 244
 245 #if LIBCURL_VERSION_NUM >= 0x070907
 246         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 247 #endif
 248 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 249         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 250 #endif
 251
 252         init_curl_http_auth(result);
 253
 254         if (ssl_cert != NULL)
 255                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 256         if (has_cert_password())
 257                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 258 #if LIBCURL_VERSION_NUM >= 0x070903
 259         if (ssl_key != NULL)
 260                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 261 #endif
 262 #if LIBCURL_VERSION_NUM >= 0x070908
 263         if (ssl_capath != NULL)
 264                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 265 #endif
 266         if (ssl_cainfo != NULL)
 267                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 268         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 269
 270         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 271                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 272                                  curl_low_speed_limit);
 273                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 274                                  curl_low_speed_time);
 275         }
 276
 277         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 278
 279         if (getenv("GIT_CURL_VERBOSE"))
 280                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 281
 282         curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT);
 283
 284         if (curl_ftp_no_epsv)
 285                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 286
 287         if (curl_http_proxy)
 288                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 289
 290         return result;
 291 }
 292
 293 static void http_auth_init(const char *url)
 294 {
 295         char *at, *colon, *cp, *slash;
 296         int len;
 297
 298         cp = strstr(url, "://");
 299         if (!cp)
 300                 return;
 301
 302         /*
 303          * Ok, the URL looks like "proto://something".  Which one?
 304          * "proto://<user>:<pass>@<host>/...",
 305          * "proto://<user>@<host>/...", or just
 306          * "proto://<host>/..."?
 307          */
 308         cp += 3;
 309         at = strchr(cp, '@');
 310         colon = strchr(cp, ':');
 311         slash = strchrnul(cp, '/');
 312         if (!at || slash <= at)
 313                 return; /* No credentials */
 314         if (!colon || at <= colon) {
 315                 /* Only username */
 316                 len = at - cp;
 317                 user_name = xmalloc(len + 1);
 318                 memcpy(user_name, cp, len);
 319                 user_name[len] = '\0';
 320                 user_pass = NULL;
 321         } else {
 322                 len = colon - cp;
 323                 user_name = xmalloc(len + 1);
 324                 memcpy(user_name, cp, len);
 325                 user_name[len] = '\0';
 326                 len = at - (colon + 1);
 327                 user_pass = xmalloc(len + 1);
 328                 memcpy(user_pass, colon + 1, len);
 329                 user_pass[len] = '\0';
 330         }
 331 }
 332
 333 static void set_from_env(const char **var, const char *envname)
 334 {
 335         const char *val = getenv(envname);
 336         if (val)
 337                 *var = val;
 338 }
 339
 340 void http_init(struct remote *remote)
 341 {
 342         char *low_speed_limit;
 343         char *low_speed_time;
 344
 345         http_is_verbose = 0;
 346
 347         git_config(http_options, NULL);
 348
 349         curl_global_init(CURL_GLOBAL_ALL);
 350
 351         if (remote && remote->http_proxy)
 352                 curl_http_proxy = xstrdup(remote->http_proxy);
 353
 354         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 355         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 356
 357 #ifdef USE_CURL_MULTI
 358         {
 359                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 360                 if (http_max_requests != NULL)
 361                         max_requests = atoi(http_max_requests);
 362         }
 363
 364         curlm = curl_multi_init();
 365         if (curlm == NULL) {
 366                 fprintf(stderr, "Error creating curl multi handle.\n");
 367                 exit(1);
 368         }
 369 #endif
 370
 371         if (getenv("GIT_SSL_NO_VERIFY"))
 372                 curl_ssl_verify = 0;
 373
 374         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 375 #if LIBCURL_VERSION_NUM >= 0x070903
 376         set_from_env(&ssl_key, "GIT_SSL_KEY");
 377 #endif
 378 #if LIBCURL_VERSION_NUM >= 0x070908
 379         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 380 #endif
 381         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 382
 383         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 384         if (low_speed_limit != NULL)
 385                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 386         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 387         if (low_speed_time != NULL)
 388                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 389
 390         if (curl_ssl_verify == -1)
 391                 curl_ssl_verify = 1;
 392
 393         curl_session_count = 0;
 394 #ifdef USE_CURL_MULTI
 395         if (max_requests < 1)
 396                 max_requests = DEFAULT_MAX_REQUESTS;
 397 #endif
 398
 399         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 400                 curl_ftp_no_epsv = 1;
 401
 402         if (remote && remote->url && remote->url[0]) {
 403                 http_auth_init(remote->url[0]);
 404                 if (!ssl_cert_password_required &&
 405                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 406                     !prefixcmp(remote->url[0], "https://"))
 407                         ssl_cert_password_required = 1;
 408         }
 409
 410 #ifndef NO_CURL_EASY_DUPHANDLE
 411         curl_default = get_curl_handle();
 412 #endif
 413 }
 414
 415 void http_cleanup(void)
 416 {
 417         struct active_request_slot *slot = active_queue_head;
 418
 419         while (slot != NULL) {
 420                 struct active_request_slot *next = slot->next;
 421                 if (slot->curl != NULL) {
 422 #ifdef USE_CURL_MULTI
 423                         curl_multi_remove_handle(curlm, slot->curl);
 424 #endif
 425                         curl_easy_cleanup(slot->curl);
 426                 }
 427                 free(slot);
 428                 slot = next;
 429         }
 430         active_queue_head = NULL;
 431
 432 #ifndef NO_CURL_EASY_DUPHANDLE
 433         curl_easy_cleanup(curl_default);
 434 #endif
 435
 436 #ifdef USE_CURL_MULTI
 437         curl_multi_cleanup(curlm);
 438 #endif
 439         curl_global_cleanup();
 440
 441         curl_slist_free_all(pragma_header);
 442         pragma_header = NULL;
 443
 444         curl_slist_free_all(no_pragma_header);
 445         no_pragma_header = NULL;
 446
 447         if (curl_http_proxy) {
 448                 free((void *)curl_http_proxy);
 449                 curl_http_proxy = NULL;
 450         }
 451
 452         if (ssl_cert_password != NULL) {
 453                 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 454                 free(ssl_cert_password);
 455                 ssl_cert_password = NULL;
 456         }
 457         ssl_cert_password_required = 0;
 458 }
 459
 460 struct active_request_slot *get_active_slot(void)
 461 {
 462         struct active_request_slot *slot = active_queue_head;
 463         struct active_request_slot *newslot;
 464
 465 #ifdef USE_CURL_MULTI
 466         int num_transfers;
 467
 468         /* Wait for a slot to open up if the queue is full */
 469         while (active_requests >= max_requests) {
 470                 curl_multi_perform(curlm, &num_transfers);
 471                 if (num_transfers < active_requests)
 472                         process_curl_messages();
 473         }
 474 #endif
 475
 476         while (slot != NULL && slot->in_use)
 477                 slot = slot->next;
 478
 479         if (slot == NULL) {
 480                 newslot = xmalloc(sizeof(*newslot));
 481                 newslot->curl = NULL;
 482                 newslot->in_use = 0;
 483                 newslot->next = NULL;
 484
 485                 slot = active_queue_head;
 486                 if (slot == NULL) {
 487                         active_queue_head = newslot;
 488                 } else {
 489                         while (slot->next != NULL)
 490                                 slot = slot->next;
 491                         slot->next = newslot;
 492                 }
 493                 slot = newslot;
 494         }
 495
 496         if (slot->curl == NULL) {
 497 #ifdef NO_CURL_EASY_DUPHANDLE
 498                 slot->curl = get_curl_handle();
 499 #else
 500                 slot->curl = curl_easy_duphandle(curl_default);
 501 #endif
 502                 curl_session_count++;
 503         }
 504
 505         active_requests++;
 506         slot->in_use = 1;
 507         slot->local = NULL;
 508         slot->results = NULL;
 509         slot->finished = NULL;
 510         slot->callback_data = NULL;
 511         slot->callback_func = NULL;
 512         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 513         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 514         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 515         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 516         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 517         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 518         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 519
 520         return slot;
 521 }
 522
 523 int start_active_slot(struct active_request_slot *slot)
 524 {
 525 #ifdef USE_CURL_MULTI
 526         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 527         int num_transfers;
 528
 529         if (curlm_result != CURLM_OK &&
 530             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 531                 active_requests--;
 532                 slot->in_use = 0;
 533                 return 0;
 534         }
 535
 536         /*
 537          * We know there must be something to do, since we just added
 538          * something.
 539          */
 540         curl_multi_perform(curlm, &num_transfers);
 541 #endif
 542         return 1;
 543 }
 544
 545 #ifdef USE_CURL_MULTI
 546 struct fill_chain {
 547         void *data;
 548         int (*fill)(void *);
 549         struct fill_chain *next;
 550 };
 551
 552 static struct fill_chain *fill_cfg;
 553
 554 void add_fill_function(void *data, int (*fill)(void *))
 555 {
 556         struct fill_chain *new = xmalloc(sizeof(*new));
 557         struct fill_chain **linkp = &fill_cfg;
 558         new->data = data;
 559         new->fill = fill;
 560         new->next = NULL;
 561         while (*linkp)
 562                 linkp = &(*linkp)->next;
 563         *linkp = new;
 564 }
 565
 566 void fill_active_slots(void)
 567 {
 568         struct active_request_slot *slot = active_queue_head;
 569
 570         while (active_requests < max_requests) {
 571                 struct fill_chain *fill;
 572                 for (fill = fill_cfg; fill; fill = fill->next)
 573                         if (fill->fill(fill->data))
 574                                 break;
 575
 576                 if (!fill)
 577                         break;
 578         }
 579
 580         while (slot != NULL) {
 581                 if (!slot->in_use && slot->curl != NULL
 582                         && curl_session_count > min_curl_sessions) {
 583                         curl_easy_cleanup(slot->curl);
 584                         slot->curl = NULL;
 585                         curl_session_count--;
 586                 }
 587                 slot = slot->next;
 588         }
 589 }
 590
 591 void step_active_slots(void)
 592 {
 593         int num_transfers;
 594         CURLMcode curlm_result;
 595
 596         do {
 597                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 598         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 599         if (num_transfers < active_requests) {
 600                 process_curl_messages();
 601                 fill_active_slots();
 602         }
 603 }
 604 #endif
 605
 606 void run_active_slot(struct active_request_slot *slot)
 607 {
 608 #ifdef USE_CURL_MULTI
 609         long last_pos = 0;
 610         long current_pos;
 611         fd_set readfds;
 612         fd_set writefds;
 613         fd_set excfds;
 614         int max_fd;
 615         struct timeval select_timeout;
 616         int finished = 0;
 617
 618         slot->finished = &finished;
 619         while (!finished) {
 620                 data_received = 0;
 621                 step_active_slots();
 622
 623                 if (!data_received && slot->local != NULL) {
 624                         current_pos = ftell(slot->local);
 625                         if (current_pos > last_pos)
 626                                 data_received++;
 627                         last_pos = current_pos;
 628                 }
 629
 630                 if (slot->in_use && !data_received) {
 631                         max_fd = 0;
 632                         FD_ZERO(&readfds);
 633                         FD_ZERO(&writefds);
 634                         FD_ZERO(&excfds);
 635                         select_timeout.tv_sec = 0;
 636                         select_timeout.tv_usec = 50000;
 637                         select(max_fd, &readfds, &writefds,
 638                                &excfds, &select_timeout);
 639                 }
 640         }
 641 #else
 642         while (slot->in_use) {
 643                 slot->curl_result = curl_easy_perform(slot->curl);
 644                 finish_active_slot(slot);
 645         }
 646 #endif
 647 }
 648
 649 static void closedown_active_slot(struct active_request_slot *slot)
 650 {
 651         active_requests--;
 652         slot->in_use = 0;
 653 }
 654
 655 static void release_active_slot(struct active_request_slot *slot)
 656 {
 657         closedown_active_slot(slot);
 658         if (slot->curl && curl_session_count > min_curl_sessions) {
 659 #ifdef USE_CURL_MULTI
 660                 curl_multi_remove_handle(curlm, slot->curl);
 661 #endif
 662                 curl_easy_cleanup(slot->curl);
 663                 slot->curl = NULL;
 664                 curl_session_count--;
 665         }
 666 #ifdef USE_CURL_MULTI
 667         fill_active_slots();
 668 #endif
 669 }
 670
 671 void finish_active_slot(struct active_request_slot *slot)
 672 {
 673         closedown_active_slot(slot);
 674         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 675
 676         if (slot->finished != NULL)
 677                 (*slot->finished) = 1;
 678
 679         /* Store slot results so they can be read after the slot is reused */
 680         if (slot->results != NULL) {
 681                 slot->results->curl_result = slot->curl_result;
 682                 slot->results->http_code = slot->http_code;
 683         }
 684
 685         /* Run callback if appropriate */
 686         if (slot->callback_func != NULL)
 687                 slot->callback_func(slot->callback_data);
 688 }
 689
 690 void finish_all_active_slots(void)
 691 {
 692         struct active_request_slot *slot = active_queue_head;
 693
 694         while (slot != NULL)
 695                 if (slot->in_use) {
 696                         run_active_slot(slot);
 697                         slot = active_queue_head;
 698                 } else {
 699                         slot = slot->next;
 700                 }
 701 }
 702
 703 /* Helpers for modifying and creating URLs */
 704 static inline int needs_quote(int ch)
 705 {
 706         if (((ch >= 'A') && (ch <= 'Z'))
 707                         || ((ch >= 'a') && (ch <= 'z'))
 708                         || ((ch >= '0') && (ch <= '9'))
 709                         || (ch == '/')
 710                         || (ch == '-')
 711                         || (ch == '.'))
 712                 return 0;
 713         return 1;
 714 }
 715
 716 static inline int hex(int v)
 717 {
 718         if (v < 10)
 719                 return '0' + v;
 720         else
 721                 return 'A' + v - 10;
 722 }
 723
 724 void end_url_with_slash(struct strbuf *buf, const char *url)
 725 {
 726         strbuf_addstr(buf, url);
 727         if (buf->len && buf->buf[buf->len - 1] != '/')
 728                 strbuf_addstr(buf, "/");
 729 }
 730
 731 static char *quote_ref_url(const char *base, const char *ref)
 732 {
 733         struct strbuf buf = STRBUF_INIT;
 734         const char *cp;
 735         int ch;
 736
 737         end_url_with_slash(&buf, base);
 738
 739         for (cp = ref; (ch = *cp) != 0; cp++)
 740                 if (needs_quote(ch))
 741                         strbuf_addf(&buf, "%%%02x", ch);
 742                 else
 743                         strbuf_addch(&buf, *cp);
 744
 745         return strbuf_detach(&buf, NULL);
 746 }
 747
 748 void append_remote_object_url(struct strbuf *buf, const char *url,
 749                               const char *hex,
 750                               int only_two_digit_prefix)
 751 {
 752         end_url_with_slash(buf, url);
 753
 754         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 755         if (!only_two_digit_prefix)
 756                 strbuf_addf(buf, "%s", hex+2);
 757 }
 758
 759 char *get_remote_object_url(const char *url, const char *hex,
 760                             int only_two_digit_prefix)
 761 {
 762         struct strbuf buf = STRBUF_INIT;
 763         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 764         return strbuf_detach(&buf, NULL);
 765 }
 766
 767 /* http_request() targets */
 768 #define HTTP_REQUEST_STRBUF     0
 769 #define HTTP_REQUEST_FILE       1
 770
 771 static int http_request(const char *url, void *result, int target, int options)
 772 {
 773         struct active_request_slot *slot;
 774         struct slot_results results;
 775         struct curl_slist *headers = NULL;
 776         struct strbuf buf = STRBUF_INIT;
 777         int ret;
 778
 779         slot = get_active_slot();
 780         slot->results = &results;
 781         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 782
 783         if (result == NULL) {
 784                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 785         } else {
 786                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 787                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 788
 789                 if (target == HTTP_REQUEST_FILE) {
 790                         long posn = ftell(result);
 791                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 792                                          fwrite);
 793                         if (posn > 0) {
 794                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 795                                 headers = curl_slist_append(headers, buf.buf);
 796                                 strbuf_reset(&buf);
 797                         }
 798                         slot->local = result;
 799                 } else
 800                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 801                                          fwrite_buffer);
 802         }
 803
 804         strbuf_addstr(&buf, "Pragma:");
 805         if (options & HTTP_NO_CACHE)
 806                 strbuf_addstr(&buf, " no-cache");
 807
 808         headers = curl_slist_append(headers, buf.buf);
 809
 810         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 811         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 812
 813         if (start_active_slot(slot)) {
 814                 run_active_slot(slot);
 815                 if (results.curl_result == CURLE_OK)
 816                         ret = HTTP_OK;
 817                 else if (missing_target(&results))
 818                         ret = HTTP_MISSING_TARGET;
 819                 else if (results.http_code == 401) {
 820                         if (user_name) {
 821                                 ret = HTTP_NOAUTH;
 822                         } else {
 823                                 /*
 824                                  * git_getpass is needed here because its very likely stdin/stdout are
 825                                  * pipes to our parent process.  So we instead need to use /dev/tty,
 826                                  * but that is non-portable.  Using git_getpass() can at least be stubbed
 827                                  * on other platforms with a different implementation if/when necessary.
 828                                  */
 829                                 user_name = xstrdup(git_getpass("Username: "));
 830                                 init_curl_http_auth(slot->curl);
 831                                 ret = HTTP_REAUTH;
 832                         }
 833                 } else
 834                         ret = HTTP_ERROR;
 835         } else {
 836                 error("Unable to start HTTP request for %s", url);
 837                 ret = HTTP_START_FAILED;
 838         }
 839
 840         slot->local = NULL;
 841         curl_slist_free_all(headers);
 842         strbuf_release(&buf);
 843
 844         return ret;
 845 }
 846
 847 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 848 {
 849         int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 850         if (http_ret == HTTP_REAUTH) {
 851                 http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 852         }
 853         return http_ret;
 854 }
 855
 856 /*
 857  * Downloads an url and stores the result in the given file.
 858  *
 859  * If a previous interrupted download is detected (i.e. a previous temporary
 860  * file is still around) the download is resumed.
 861  */
 862 static int http_get_file(const char *url, const char *filename, int options)
 863 {
 864         int ret;
 865         struct strbuf tmpfile = STRBUF_INIT;
 866         FILE *result;
 867
 868         strbuf_addf(&tmpfile, "%s.temp", filename);
 869         result = fopen(tmpfile.buf, "a");
 870         if (! result) {
 871                 error("Unable to open local file %s", tmpfile.buf);
 872                 ret = HTTP_ERROR;
 873                 goto cleanup;
 874         }
 875
 876         ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 877         fclose(result);
 878
 879         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 880                 ret = HTTP_ERROR;
 881 cleanup:
 882         strbuf_release(&tmpfile);
 883         return ret;
 884 }
 885
 886 int http_error(const char *url, int ret)
 887 {
 888         /* http_request has already handled HTTP_START_FAILED. */
 889         if (ret != HTTP_START_FAILED)
 890                 error("%s while accessing %s\n", curl_errorstr, url);
 891
 892         return ret;
 893 }
 894
 895 int http_fetch_ref(const char *base, struct ref *ref)
 896 {
 897         char *url;
 898         struct strbuf buffer = STRBUF_INIT;
 899         int ret = -1;
 900
 901         url = quote_ref_url(base, ref->name);
 902         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 903                 strbuf_rtrim(&buffer);
 904                 if (buffer.len == 40)
 905                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 906                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 907                         ref->symref = xstrdup(buffer.buf + 5);
 908                         ret = 0;
 909                 }
 910         }
 911
 912         strbuf_release(&buffer);
 913         free(url);
 914         return ret;
 915 }
 916
 917 /* Helpers for fetching packs */
 918 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 919 {
 920         char *url, *tmp;
 921         struct strbuf buf = STRBUF_INIT;
 922
 923         if (http_is_verbose)
 924                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 925
 926         end_url_with_slash(&buf, base_url);
 927         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 928         url = strbuf_detach(&buf, NULL);
 929
 930         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 931         tmp = strbuf_detach(&buf, NULL);
 932
 933         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 934                 error("Unable to get pack index %s\n", url);
 935                 free(tmp);
 936                 tmp = NULL;
 937         }
 938
 939         free(url);
 940         return tmp;
 941 }
 942
 943 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 944         unsigned char *sha1, const char *base_url)
 945 {
 946         struct packed_git *new_pack;
 947         char *tmp_idx = NULL;
 948         int ret;
 949
 950         if (has_pack_index(sha1)) {
 951                 new_pack = parse_pack_index(sha1, NULL);
 952                 if (!new_pack)
 953                         return -1; /* parse_pack_index() already issued error message */
 954                 goto add_pack;
 955         }
 956
 957         tmp_idx = fetch_pack_index(sha1, base_url);
 958         if (!tmp_idx)
 959                 return -1;
 960
 961         new_pack = parse_pack_index(sha1, tmp_idx);
 962         if (!new_pack) {
 963                 unlink(tmp_idx);
 964                 free(tmp_idx);
 965
 966                 return -1; /* parse_pack_index() already issued error message */
 967         }
 968
 969         ret = verify_pack_index(new_pack);
 970         if (!ret) {
 971                 close_pack_index(new_pack);
 972                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 973         }
 974         free(tmp_idx);
 975         if (ret)
 976                 return -1;
 977
 978 add_pack:
 979         new_pack->next = *packs_head;
 980         *packs_head = new_pack;
 981         return 0;
 982 }
 983
 984 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
 985 {
 986         int ret = 0, i = 0;
 987         char *url, *data;
 988         struct strbuf buf = STRBUF_INIT;
 989         unsigned char sha1[20];
 990
 991         end_url_with_slash(&buf, base_url);
 992         strbuf_addstr(&buf, "objects/info/packs");
 993         url = strbuf_detach(&buf, NULL);
 994
 995         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
 996         if (ret != HTTP_OK)
 997                 goto cleanup;
 998
 999         data = buf.buf;
1000         while (i < buf.len) {
1001                 switch (data[i]) {
1002                 case 'P':
1003                         i++;
1004                         if (i + 52 <= buf.len &&
1005                             !prefixcmp(data + i, " pack-") &&
1006                             !prefixcmp(data + i + 46, ".pack\n")) {
1007                                 get_sha1_hex(data + i + 6, sha1);
1008                                 fetch_and_setup_pack_index(packs_head, sha1,
1009                                                       base_url);
1010                                 i += 51;
1011                                 break;
1012                         }
1013                 default:
1014                         while (i < buf.len && data[i] != '\n')
1015                                 i++;
1016                 }
1017                 i++;
1018         }
1019
1020 cleanup:
1021         free(url);
1022         return ret;
1023 }
1024
1025 void release_http_pack_request(struct http_pack_request *preq)
1026 {
1027         if (preq->packfile != NULL) {
1028                 fclose(preq->packfile);
1029                 preq->packfile = NULL;
1030                 preq->slot->local = NULL;
1031         }
1032         if (preq->range_header != NULL) {
1033                 curl_slist_free_all(preq->range_header);
1034                 preq->range_header = NULL;
1035         }
1036         preq->slot = NULL;
1037         free(preq->url);
1038 }
1039
1040 int finish_http_pack_request(struct http_pack_request *preq)
1041 {
1042         struct packed_git **lst;
1043         struct packed_git *p = preq->target;
1044         char *tmp_idx;
1045         struct child_process ip;
1046         const char *ip_argv[8];
1047
1048         close_pack_index(p);
1049
1050         fclose(preq->packfile);
1051         preq->packfile = NULL;
1052         preq->slot->local = NULL;
1053
1054         lst = preq->lst;
1055         while (*lst != p)
1056                 lst = &((*lst)->next);
1057         *lst = (*lst)->next;
1058
1059         tmp_idx = xstrdup(preq->tmpfile);
1060         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1061                ".idx.temp");
1062
1063         ip_argv[0] = "index-pack";
1064         ip_argv[1] = "-o";
1065         ip_argv[2] = tmp_idx;
1066         ip_argv[3] = preq->tmpfile;
1067         ip_argv[4] = NULL;
1068
1069         memset(&ip, 0, sizeof(ip));
1070         ip.argv = ip_argv;
1071         ip.git_cmd = 1;
1072         ip.no_stdin = 1;
1073         ip.no_stdout = 1;
1074
1075         if (run_command(&ip)) {
1076                 unlink(preq->tmpfile);
1077                 unlink(tmp_idx);
1078                 free(tmp_idx);
1079                 return -1;
1080         }
1081
1082         unlink(sha1_pack_index_name(p->sha1));
1083
1084         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1085          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1086                 free(tmp_idx);
1087                 return -1;
1088         }
1089
1090         install_packed_git(p);
1091         free(tmp_idx);
1092         return 0;
1093 }
1094
1095 struct http_pack_request *new_http_pack_request(
1096         struct packed_git *target, const char *base_url)
1097 {
1098         long prev_posn = 0;
1099         char range[RANGE_HEADER_SIZE];
1100         struct strbuf buf = STRBUF_INIT;
1101         struct http_pack_request *preq;
1102
1103         preq = xmalloc(sizeof(*preq));
1104         preq->target = target;
1105         preq->range_header = NULL;
1106
1107         end_url_with_slash(&buf, base_url);
1108         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1109                 sha1_to_hex(target->sha1));
1110         preq->url = strbuf_detach(&buf, NULL);
1111
1112         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1113                 sha1_pack_name(target->sha1));
1114         preq->packfile = fopen(preq->tmpfile, "a");
1115         if (!preq->packfile) {
1116                 error("Unable to open local file %s for pack",
1117                       preq->tmpfile);
1118                 goto abort;
1119         }
1120
1121         preq->slot = get_active_slot();
1122         preq->slot->local = preq->packfile;
1123         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1124         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1125         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1126         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1127                 no_pragma_header);
1128
1129         /*
1130          * If there is data present from a previous transfer attempt,
1131          * resume where it left off
1132          */
1133         prev_posn = ftell(preq->packfile);
1134         if (prev_posn>0) {
1135                 if (http_is_verbose)
1136                         fprintf(stderr,
1137                                 "Resuming fetch of pack %s at byte %ld\n",
1138                                 sha1_to_hex(target->sha1), prev_posn);
1139                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1140                 preq->range_header = curl_slist_append(NULL, range);
1141                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1142                         preq->range_header);
1143         }
1144
1145         return preq;
1146
1147 abort:
1148         free(preq->url);
1149         free(preq);
1150         return NULL;
1151 }
1152
1153 /* Helpers for fetching objects (loose) */
1154 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
1155                                void *data)
1156 {
1157         unsigned char expn[4096];
1158         size_t size = eltsize * nmemb;
1159         int posn = 0;
1160         struct http_object_request *freq =
1161                 (struct http_object_request *)data;
1162         do {
1163                 ssize_t retval = xwrite(freq->localfile,
1164                                         (char *) ptr + posn, size - posn);
1165                 if (retval < 0)
1166                         return posn;
1167                 posn += retval;
1168         } while (posn < size);
1169
1170         freq->stream.avail_in = size;
1171         freq->stream.next_in = ptr;
1172         do {
1173                 freq->stream.next_out = expn;
1174                 freq->stream.avail_out = sizeof(expn);
1175                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1176                 git_SHA1_Update(&freq->c, expn,
1177                                 sizeof(expn) - freq->stream.avail_out);
1178         } while (freq->stream.avail_in && freq->zret == Z_OK);
1179         data_received++;
1180         return size;
1181 }
1182
1183 struct http_object_request *new_http_object_request(const char *base_url,
1184         unsigned char *sha1)
1185 {
1186         char *hex = sha1_to_hex(sha1);
1187         char *filename;
1188         char prevfile[PATH_MAX];
1189         int prevlocal;
1190         unsigned char prev_buf[PREV_BUF_SIZE];
1191         ssize_t prev_read = 0;
1192         long prev_posn = 0;
1193         char range[RANGE_HEADER_SIZE];
1194         struct curl_slist *range_header = NULL;
1195         struct http_object_request *freq;
1196
1197         freq = xmalloc(sizeof(*freq));
1198         hashcpy(freq->sha1, sha1);
1199         freq->localfile = -1;
1200
1201         filename = sha1_file_name(sha1);
1202         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1203                  "%s.temp", filename);
1204
1205         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1206         unlink_or_warn(prevfile);
1207         rename(freq->tmpfile, prevfile);
1208         unlink_or_warn(freq->tmpfile);
1209
1210         if (freq->localfile != -1)
1211                 error("fd leakage in start: %d", freq->localfile);
1212         freq->localfile = open(freq->tmpfile,
1213                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1214         /*
1215          * This could have failed due to the "lazy directory creation";
1216          * try to mkdir the last path component.
1217          */
1218         if (freq->localfile < 0 && errno == ENOENT) {
1219                 char *dir = strrchr(freq->tmpfile, '/');
1220                 if (dir) {
1221                         *dir = 0;
1222                         mkdir(freq->tmpfile, 0777);
1223                         *dir = '/';
1224                 }
1225                 freq->localfile = open(freq->tmpfile,
1226                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1227         }
1228
1229         if (freq->localfile < 0) {
1230                 error("Couldn't create temporary file %s: %s",
1231                       freq->tmpfile, strerror(errno));
1232                 goto abort;
1233         }
1234
1235         memset(&freq->stream, 0, sizeof(freq->stream));
1236
1237         git_inflate_init(&freq->stream);
1238
1239         git_SHA1_Init(&freq->c);
1240
1241         freq->url = get_remote_object_url(base_url, hex, 0);
1242
1243         /*
1244          * If a previous temp file is present, process what was already
1245          * fetched.
1246          */
1247         prevlocal = open(prevfile, O_RDONLY);
1248         if (prevlocal != -1) {
1249                 do {
1250                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1251                         if (prev_read>0) {
1252                                 if (fwrite_sha1_file(prev_buf,
1253                                                      1,
1254                                                      prev_read,
1255                                                      freq) == prev_read) {
1256                                         prev_posn += prev_read;
1257                                 } else {
1258                                         prev_read = -1;
1259                                 }
1260                         }
1261                 } while (prev_read > 0);
1262                 close(prevlocal);
1263         }
1264         unlink_or_warn(prevfile);
1265
1266         /*
1267          * Reset inflate/SHA1 if there was an error reading the previous temp
1268          * file; also rewind to the beginning of the local file.
1269          */
1270         if (prev_read == -1) {
1271                 memset(&freq->stream, 0, sizeof(freq->stream));
1272                 git_inflate_init(&freq->stream);
1273                 git_SHA1_Init(&freq->c);
1274                 if (prev_posn>0) {
1275                         prev_posn = 0;
1276                         lseek(freq->localfile, 0, SEEK_SET);
1277                         if (ftruncate(freq->localfile, 0) < 0) {
1278                                 error("Couldn't truncate temporary file %s: %s",
1279                                           freq->tmpfile, strerror(errno));
1280                                 goto abort;
1281                         }
1282                 }
1283         }
1284
1285         freq->slot = get_active_slot();
1286
1287         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1288         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1289         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1290         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1291         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1292
1293         /*
1294          * If we have successfully processed data from a previous fetch
1295          * attempt, only fetch the data we don't already have.
1296          */
1297         if (prev_posn>0) {
1298                 if (http_is_verbose)
1299                         fprintf(stderr,
1300                                 "Resuming fetch of object %s at byte %ld\n",
1301                                 hex, prev_posn);
1302                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1303                 range_header = curl_slist_append(range_header, range);
1304                 curl_easy_setopt(freq->slot->curl,
1305                                  CURLOPT_HTTPHEADER, range_header);
1306         }
1307
1308         return freq;
1309
1310 abort:
1311         free(filename);
1312         free(freq->url);
1313         free(freq);
1314         return NULL;
1315 }
1316
1317 void process_http_object_request(struct http_object_request *freq)
1318 {
1319         if (freq->slot == NULL)
1320                 return;
1321         freq->curl_result = freq->slot->curl_result;
1322         freq->http_code = freq->slot->http_code;
1323         freq->slot = NULL;
1324 }
1325
1326 int finish_http_object_request(struct http_object_request *freq)
1327 {
1328         struct stat st;
1329
1330         close(freq->localfile);
1331         freq->localfile = -1;
1332
1333         process_http_object_request(freq);
1334
1335         if (freq->http_code == 416) {
1336                 warning("requested range invalid; we may already have all the data.");
1337         } else if (freq->curl_result != CURLE_OK) {
1338                 if (stat(freq->tmpfile, &st) == 0)
1339                         if (st.st_size == 0)
1340                                 unlink_or_warn(freq->tmpfile);
1341                 return -1;
1342         }
1343
1344         git_inflate_end(&freq->stream);
1345         git_SHA1_Final(freq->real_sha1, &freq->c);
1346         if (freq->zret != Z_STREAM_END) {
1347                 unlink_or_warn(freq->tmpfile);
1348                 return -1;
1349         }
1350         if (hashcmp(freq->sha1, freq->real_sha1)) {
1351                 unlink_or_warn(freq->tmpfile);
1352                 return -1;
1353         }
1354         freq->rename =
1355                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1356
1357         return freq->rename;
1358 }
1359
1360 void abort_http_object_request(struct http_object_request *freq)
1361 {
1362         unlink_or_warn(freq->tmpfile);
1363
1364         release_http_object_request(freq);
1365 }
1366
1367 void release_http_object_request(struct http_object_request *freq)
1368 {
1369         if (freq->localfile != -1) {
1370                 close(freq->localfile);
1371                 freq->localfile = -1;
1372         }
1373         if (freq->url != NULL) {
1374                 free(freq->url);
1375                 freq->url = NULL;
1376         }
1377         if (freq->slot != NULL) {
1378                 freq->slot->callback_func = NULL;
1379                 freq->slot->callback_data = NULL;
1380                 release_active_slot(freq->slot);
1381                 freq->slot = NULL;
1382         }
1383 }