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 static const char *user_agent;
  45
  46 #if LIBCURL_VERSION_NUM >= 0x071700
  47 /* Use CURLOPT_KEYPASSWD as is */
  48 #elif LIBCURL_VERSION_NUM >= 0x070903
  49 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  50 #else
  51 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  52 #endif
  53
  54 static char *ssl_cert_password;
  55 static int ssl_cert_password_required;
  56
  57 static struct curl_slist *pragma_header;
  58 static struct curl_slist *no_pragma_header;
  59
  60 static struct active_request_slot *active_queue_head;
  61
  62 size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  63 {
  64         size_t size = eltsize * nmemb;
  65         struct buffer *buffer = buffer_;
  66
  67         if (size > buffer->buf.len - buffer->posn)
  68                 size = buffer->buf.len - buffer->posn;
  69         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  70         buffer->posn += size;
  71
  72         return size;
  73 }
  74
  75 #ifndef NO_CURL_IOCTL
  76 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  77 {
  78         struct buffer *buffer = clientp;
  79
  80         switch (cmd) {
  81         case CURLIOCMD_NOP:
  82                 return CURLIOE_OK;
  83
  84         case CURLIOCMD_RESTARTREAD:
  85                 buffer->posn = 0;
  86                 return CURLIOE_OK;
  87
  88         default:
  89                 return CURLIOE_UNKNOWNCMD;
  90         }
  91 }
  92 #endif
  93
  94 size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  95 {
  96         size_t size = eltsize * nmemb;
  97         struct strbuf *buffer = buffer_;
  98
  99         strbuf_add(buffer, ptr, size);
 100         data_received++;
 101         return size;
 102 }
 103
 104 size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 105 {
 106         data_received++;
 107         return eltsize * nmemb;
 108 }
 109
 110 #ifdef USE_CURL_MULTI
 111 static void process_curl_messages(void)
 112 {
 113         int num_messages;
 114         struct active_request_slot *slot;
 115         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 116
 117         while (curl_message != NULL) {
 118                 if (curl_message->msg == CURLMSG_DONE) {
 119                         int curl_result = curl_message->data.result;
 120                         slot = active_queue_head;
 121                         while (slot != NULL &&
 122                                slot->curl != curl_message->easy_handle)
 123                                 slot = slot->next;
 124                         if (slot != NULL) {
 125                                 curl_multi_remove_handle(curlm, slot->curl);
 126                                 slot->curl_result = curl_result;
 127                                 finish_active_slot(slot);
 128                         } else {
 129                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 130                         }
 131                 } else {
 132                         fprintf(stderr, "Unknown CURL message received: %d\n",
 133                                 (int)curl_message->msg);
 134                 }
 135                 curl_message = curl_multi_info_read(curlm, &num_messages);
 136         }
 137 }
 138 #endif
 139
 140 static int http_options(const char *var, const char *value, void *cb)
 141 {
 142         if (!strcmp("http.sslverify", var)) {
 143                 curl_ssl_verify = git_config_bool(var, value);
 144                 return 0;
 145         }
 146         if (!strcmp("http.sslcert", var))
 147                 return git_config_string(&ssl_cert, var, value);
 148 #if LIBCURL_VERSION_NUM >= 0x070903
 149         if (!strcmp("http.sslkey", var))
 150                 return git_config_string(&ssl_key, var, value);
 151 #endif
 152 #if LIBCURL_VERSION_NUM >= 0x070908
 153         if (!strcmp("http.sslcapath", var))
 154                 return git_config_string(&ssl_capath, var, value);
 155 #endif
 156         if (!strcmp("http.sslcainfo", var))
 157                 return git_config_string(&ssl_cainfo, var, value);
 158         if (!strcmp("http.sslcertpasswordprotected", var)) {
 159                 if (git_config_bool(var, value))
 160                         ssl_cert_password_required = 1;
 161                 return 0;
 162         }
 163         if (!strcmp("http.minsessions", var)) {
 164                 min_curl_sessions = git_config_int(var, value);
 165 #ifndef USE_CURL_MULTI
 166                 if (min_curl_sessions > 1)
 167                         min_curl_sessions = 1;
 168 #endif
 169                 return 0;
 170         }
 171 #ifdef USE_CURL_MULTI
 172         if (!strcmp("http.maxrequests", var)) {
 173                 max_requests = git_config_int(var, value);
 174                 return 0;
 175         }
 176 #endif
 177         if (!strcmp("http.lowspeedlimit", var)) {
 178                 curl_low_speed_limit = (long)git_config_int(var, value);
 179                 return 0;
 180         }
 181         if (!strcmp("http.lowspeedtime", var)) {
 182                 curl_low_speed_time = (long)git_config_int(var, value);
 183                 return 0;
 184         }
 185
 186         if (!strcmp("http.noepsv", var)) {
 187                 curl_ftp_no_epsv = git_config_bool(var, value);
 188                 return 0;
 189         }
 190         if (!strcmp("http.proxy", var))
 191                 return git_config_string(&curl_http_proxy, var, value);
 192
 193         if (!strcmp("http.postbuffer", var)) {
 194                 http_post_buffer = git_config_int(var, value);
 195                 if (http_post_buffer < LARGE_PACKET_MAX)
 196                         http_post_buffer = LARGE_PACKET_MAX;
 197                 return 0;
 198         }
 199
 200         if (!strcmp("http.useragent", var))
 201                 return git_config_string(&user_agent, var, value);
 202
 203         /* Fall back on the default ones */
 204         return git_default_config(var, value, cb);
 205 }
 206
 207 static void init_curl_http_auth(CURL *result)
 208 {
 209         if (user_name) {
 210                 struct strbuf up = STRBUF_INIT;
 211                 if (!user_pass)
 212                         user_pass = xstrdup(git_getpass("Password: "));
 213                 strbuf_addf(&up, "%s:%s", user_name, user_pass);
 214                 curl_easy_setopt(result, CURLOPT_USERPWD,
 215                                  strbuf_detach(&up, NULL));
 216         }
 217 }
 218
 219 static int has_cert_password(void)
 220 {
 221         if (ssl_cert_password != NULL)
 222                 return 1;
 223         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 224                 return 0;
 225         /* Only prompt the user once. */
 226         ssl_cert_password_required = -1;
 227         ssl_cert_password = git_getpass("Certificate Password: ");
 228         if (ssl_cert_password != NULL) {
 229                 ssl_cert_password = xstrdup(ssl_cert_password);
 230                 return 1;
 231         } else
 232                 return 0;
 233 }
 234
 235 static CURL *get_curl_handle(void)
 236 {
 237         CURL *result = curl_easy_init();
 238
 239         if (!curl_ssl_verify) {
 240                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 241                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 242         } else {
 243                 /* Verify authenticity of the peer's certificate */
 244                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 245                 /* The name in the cert must match whom we tried to connect */
 246                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 247         }
 248
 249 #if LIBCURL_VERSION_NUM >= 0x070907
 250         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 251 #endif
 252 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 253         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 254 #endif
 255
 256         init_curl_http_auth(result);
 257
 258         if (ssl_cert != NULL)
 259                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 260         if (has_cert_password())
 261                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 262 #if LIBCURL_VERSION_NUM >= 0x070903
 263         if (ssl_key != NULL)
 264                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 265 #endif
 266 #if LIBCURL_VERSION_NUM >= 0x070908
 267         if (ssl_capath != NULL)
 268                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 269 #endif
 270         if (ssl_cainfo != NULL)
 271                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 272         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 273
 274         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 275                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 276                                  curl_low_speed_limit);
 277                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 278                                  curl_low_speed_time);
 279         }
 280
 281         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 282
 283         if (getenv("GIT_CURL_VERBOSE"))
 284                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 285
 286         curl_easy_setopt(result, CURLOPT_USERAGENT,
 287                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 288
 289         if (curl_ftp_no_epsv)
 290                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 291
 292         if (curl_http_proxy)
 293                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 294
 295         return result;
 296 }
 297
 298 static void http_auth_init(const char *url)
 299 {
 300         char *at, *colon, *cp, *slash;
 301         int len;
 302
 303         cp = strstr(url, "://");
 304         if (!cp)
 305                 return;
 306
 307         /*
 308          * Ok, the URL looks like "proto://something".  Which one?
 309          * "proto://<user>:<pass>@<host>/...",
 310          * "proto://<user>@<host>/...", or just
 311          * "proto://<host>/..."?
 312          */
 313         cp += 3;
 314         at = strchr(cp, '@');
 315         colon = strchr(cp, ':');
 316         slash = strchrnul(cp, '/');
 317         if (!at || slash <= at)
 318                 return; /* No credentials */
 319         if (!colon || at <= colon) {
 320                 /* Only username */
 321                 len = at - cp;
 322                 user_name = xmalloc(len + 1);
 323                 memcpy(user_name, cp, len);
 324                 user_name[len] = '\0';
 325                 user_pass = NULL;
 326         } else {
 327                 len = colon - cp;
 328                 user_name = xmalloc(len + 1);
 329                 memcpy(user_name, cp, len);
 330                 user_name[len] = '\0';
 331                 len = at - (colon + 1);
 332                 user_pass = xmalloc(len + 1);
 333                 memcpy(user_pass, colon + 1, len);
 334                 user_pass[len] = '\0';
 335         }
 336 }
 337
 338 static void set_from_env(const char **var, const char *envname)
 339 {
 340         const char *val = getenv(envname);
 341         if (val)
 342                 *var = val;
 343 }
 344
 345 void http_init(struct remote *remote)
 346 {
 347         char *low_speed_limit;
 348         char *low_speed_time;
 349
 350         http_is_verbose = 0;
 351
 352         git_config(http_options, NULL);
 353
 354         curl_global_init(CURL_GLOBAL_ALL);
 355
 356         if (remote && remote->http_proxy)
 357                 curl_http_proxy = xstrdup(remote->http_proxy);
 358
 359         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 360         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 361
 362 #ifdef USE_CURL_MULTI
 363         {
 364                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 365                 if (http_max_requests != NULL)
 366                         max_requests = atoi(http_max_requests);
 367         }
 368
 369         curlm = curl_multi_init();
 370         if (curlm == NULL) {
 371                 fprintf(stderr, "Error creating curl multi handle.\n");
 372                 exit(1);
 373         }
 374 #endif
 375
 376         if (getenv("GIT_SSL_NO_VERIFY"))
 377                 curl_ssl_verify = 0;
 378
 379         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 380 #if LIBCURL_VERSION_NUM >= 0x070903
 381         set_from_env(&ssl_key, "GIT_SSL_KEY");
 382 #endif
 383 #if LIBCURL_VERSION_NUM >= 0x070908
 384         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 385 #endif
 386         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 387
 388         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 389
 390         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 391         if (low_speed_limit != NULL)
 392                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 393         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 394         if (low_speed_time != NULL)
 395                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 396
 397         if (curl_ssl_verify == -1)
 398                 curl_ssl_verify = 1;
 399
 400         curl_session_count = 0;
 401 #ifdef USE_CURL_MULTI
 402         if (max_requests < 1)
 403                 max_requests = DEFAULT_MAX_REQUESTS;
 404 #endif
 405
 406         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 407                 curl_ftp_no_epsv = 1;
 408
 409         if (remote && remote->url && remote->url[0]) {
 410                 http_auth_init(remote->url[0]);
 411                 if (!ssl_cert_password_required &&
 412                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 413                     !prefixcmp(remote->url[0], "https://"))
 414                         ssl_cert_password_required = 1;
 415         }
 416
 417 #ifndef NO_CURL_EASY_DUPHANDLE
 418         curl_default = get_curl_handle();
 419 #endif
 420 }
 421
 422 void http_cleanup(void)
 423 {
 424         struct active_request_slot *slot = active_queue_head;
 425
 426         while (slot != NULL) {
 427                 struct active_request_slot *next = slot->next;
 428                 if (slot->curl != NULL) {
 429 #ifdef USE_CURL_MULTI
 430                         curl_multi_remove_handle(curlm, slot->curl);
 431 #endif
 432                         curl_easy_cleanup(slot->curl);
 433                 }
 434                 free(slot);
 435                 slot = next;
 436         }
 437         active_queue_head = NULL;
 438
 439 #ifndef NO_CURL_EASY_DUPHANDLE
 440         curl_easy_cleanup(curl_default);
 441 #endif
 442
 443 #ifdef USE_CURL_MULTI
 444         curl_multi_cleanup(curlm);
 445 #endif
 446         curl_global_cleanup();
 447
 448         curl_slist_free_all(pragma_header);
 449         pragma_header = NULL;
 450
 451         curl_slist_free_all(no_pragma_header);
 452         no_pragma_header = NULL;
 453
 454         if (curl_http_proxy) {
 455                 free((void *)curl_http_proxy);
 456                 curl_http_proxy = NULL;
 457         }
 458
 459         if (ssl_cert_password != NULL) {
 460                 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 461                 free(ssl_cert_password);
 462                 ssl_cert_password = NULL;
 463         }
 464         ssl_cert_password_required = 0;
 465 }
 466
 467 struct active_request_slot *get_active_slot(void)
 468 {
 469         struct active_request_slot *slot = active_queue_head;
 470         struct active_request_slot *newslot;
 471
 472 #ifdef USE_CURL_MULTI
 473         int num_transfers;
 474
 475         /* Wait for a slot to open up if the queue is full */
 476         while (active_requests >= max_requests) {
 477                 curl_multi_perform(curlm, &num_transfers);
 478                 if (num_transfers < active_requests)
 479                         process_curl_messages();
 480         }
 481 #endif
 482
 483         while (slot != NULL && slot->in_use)
 484                 slot = slot->next;
 485
 486         if (slot == NULL) {
 487                 newslot = xmalloc(sizeof(*newslot));
 488                 newslot->curl = NULL;
 489                 newslot->in_use = 0;
 490                 newslot->next = NULL;
 491
 492                 slot = active_queue_head;
 493                 if (slot == NULL) {
 494                         active_queue_head = newslot;
 495                 } else {
 496                         while (slot->next != NULL)
 497                                 slot = slot->next;
 498                         slot->next = newslot;
 499                 }
 500                 slot = newslot;
 501         }
 502
 503         if (slot->curl == NULL) {
 504 #ifdef NO_CURL_EASY_DUPHANDLE
 505                 slot->curl = get_curl_handle();
 506 #else
 507                 slot->curl = curl_easy_duphandle(curl_default);
 508 #endif
 509                 curl_session_count++;
 510         }
 511
 512         active_requests++;
 513         slot->in_use = 1;
 514         slot->local = NULL;
 515         slot->results = NULL;
 516         slot->finished = NULL;
 517         slot->callback_data = NULL;
 518         slot->callback_func = NULL;
 519         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 520         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 521         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 522         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 523         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 524         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 525         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 526
 527         return slot;
 528 }
 529
 530 int start_active_slot(struct active_request_slot *slot)
 531 {
 532 #ifdef USE_CURL_MULTI
 533         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 534         int num_transfers;
 535
 536         if (curlm_result != CURLM_OK &&
 537             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 538                 active_requests--;
 539                 slot->in_use = 0;
 540                 return 0;
 541         }
 542
 543         /*
 544          * We know there must be something to do, since we just added
 545          * something.
 546          */
 547         curl_multi_perform(curlm, &num_transfers);
 548 #endif
 549         return 1;
 550 }
 551
 552 #ifdef USE_CURL_MULTI
 553 struct fill_chain {
 554         void *data;
 555         int (*fill)(void *);
 556         struct fill_chain *next;
 557 };
 558
 559 static struct fill_chain *fill_cfg;
 560
 561 void add_fill_function(void *data, int (*fill)(void *))
 562 {
 563         struct fill_chain *new = xmalloc(sizeof(*new));
 564         struct fill_chain **linkp = &fill_cfg;
 565         new->data = data;
 566         new->fill = fill;
 567         new->next = NULL;
 568         while (*linkp)
 569                 linkp = &(*linkp)->next;
 570         *linkp = new;
 571 }
 572
 573 void fill_active_slots(void)
 574 {
 575         struct active_request_slot *slot = active_queue_head;
 576
 577         while (active_requests < max_requests) {
 578                 struct fill_chain *fill;
 579                 for (fill = fill_cfg; fill; fill = fill->next)
 580                         if (fill->fill(fill->data))
 581                                 break;
 582
 583                 if (!fill)
 584                         break;
 585         }
 586
 587         while (slot != NULL) {
 588                 if (!slot->in_use && slot->curl != NULL
 589                         && curl_session_count > min_curl_sessions) {
 590                         curl_easy_cleanup(slot->curl);
 591                         slot->curl = NULL;
 592                         curl_session_count--;
 593                 }
 594                 slot = slot->next;
 595         }
 596 }
 597
 598 void step_active_slots(void)
 599 {
 600         int num_transfers;
 601         CURLMcode curlm_result;
 602
 603         do {
 604                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 605         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 606         if (num_transfers < active_requests) {
 607                 process_curl_messages();
 608                 fill_active_slots();
 609         }
 610 }
 611 #endif
 612
 613 void run_active_slot(struct active_request_slot *slot)
 614 {
 615 #ifdef USE_CURL_MULTI
 616         long last_pos = 0;
 617         long current_pos;
 618         fd_set readfds;
 619         fd_set writefds;
 620         fd_set excfds;
 621         int max_fd;
 622         struct timeval select_timeout;
 623         int finished = 0;
 624
 625         slot->finished = &finished;
 626         while (!finished) {
 627                 data_received = 0;
 628                 step_active_slots();
 629
 630                 if (!data_received && slot->local != NULL) {
 631                         current_pos = ftell(slot->local);
 632                         if (current_pos > last_pos)
 633                                 data_received++;
 634                         last_pos = current_pos;
 635                 }
 636
 637                 if (slot->in_use && !data_received) {
 638                         max_fd = 0;
 639                         FD_ZERO(&readfds);
 640                         FD_ZERO(&writefds);
 641                         FD_ZERO(&excfds);
 642                         select_timeout.tv_sec = 0;
 643                         select_timeout.tv_usec = 50000;
 644                         select(max_fd, &readfds, &writefds,
 645                                &excfds, &select_timeout);
 646                 }
 647         }
 648 #else
 649         while (slot->in_use) {
 650                 slot->curl_result = curl_easy_perform(slot->curl);
 651                 finish_active_slot(slot);
 652         }
 653 #endif
 654 }
 655
 656 static void closedown_active_slot(struct active_request_slot *slot)
 657 {
 658         active_requests--;
 659         slot->in_use = 0;
 660 }
 661
 662 static void release_active_slot(struct active_request_slot *slot)
 663 {
 664         closedown_active_slot(slot);
 665         if (slot->curl && curl_session_count > min_curl_sessions) {
 666 #ifdef USE_CURL_MULTI
 667                 curl_multi_remove_handle(curlm, slot->curl);
 668 #endif
 669                 curl_easy_cleanup(slot->curl);
 670                 slot->curl = NULL;
 671                 curl_session_count--;
 672         }
 673 #ifdef USE_CURL_MULTI
 674         fill_active_slots();
 675 #endif
 676 }
 677
 678 void finish_active_slot(struct active_request_slot *slot)
 679 {
 680         closedown_active_slot(slot);
 681         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 682
 683         if (slot->finished != NULL)
 684                 (*slot->finished) = 1;
 685
 686         /* Store slot results so they can be read after the slot is reused */
 687         if (slot->results != NULL) {
 688                 slot->results->curl_result = slot->curl_result;
 689                 slot->results->http_code = slot->http_code;
 690         }
 691
 692         /* Run callback if appropriate */
 693         if (slot->callback_func != NULL)
 694                 slot->callback_func(slot->callback_data);
 695 }
 696
 697 void finish_all_active_slots(void)
 698 {
 699         struct active_request_slot *slot = active_queue_head;
 700
 701         while (slot != NULL)
 702                 if (slot->in_use) {
 703                         run_active_slot(slot);
 704                         slot = active_queue_head;
 705                 } else {
 706                         slot = slot->next;
 707                 }
 708 }
 709
 710 /* Helpers for modifying and creating URLs */
 711 static inline int needs_quote(int ch)
 712 {
 713         if (((ch >= 'A') && (ch <= 'Z'))
 714                         || ((ch >= 'a') && (ch <= 'z'))
 715                         || ((ch >= '0') && (ch <= '9'))
 716                         || (ch == '/')
 717                         || (ch == '-')
 718                         || (ch == '.'))
 719                 return 0;
 720         return 1;
 721 }
 722
 723 static inline int hex(int v)
 724 {
 725         if (v < 10)
 726                 return '0' + v;
 727         else
 728                 return 'A' + v - 10;
 729 }
 730
 731 void end_url_with_slash(struct strbuf *buf, const char *url)
 732 {
 733         strbuf_addstr(buf, url);
 734         if (buf->len && buf->buf[buf->len - 1] != '/')
 735                 strbuf_addstr(buf, "/");
 736 }
 737
 738 static char *quote_ref_url(const char *base, const char *ref)
 739 {
 740         struct strbuf buf = STRBUF_INIT;
 741         const char *cp;
 742         int ch;
 743
 744         end_url_with_slash(&buf, base);
 745
 746         for (cp = ref; (ch = *cp) != 0; cp++)
 747                 if (needs_quote(ch))
 748                         strbuf_addf(&buf, "%%%02x", ch);
 749                 else
 750                         strbuf_addch(&buf, *cp);
 751
 752         return strbuf_detach(&buf, NULL);
 753 }
 754
 755 void append_remote_object_url(struct strbuf *buf, const char *url,
 756                               const char *hex,
 757                               int only_two_digit_prefix)
 758 {
 759         end_url_with_slash(buf, url);
 760
 761         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 762         if (!only_two_digit_prefix)
 763                 strbuf_addf(buf, "%s", hex+2);
 764 }
 765
 766 char *get_remote_object_url(const char *url, const char *hex,
 767                             int only_two_digit_prefix)
 768 {
 769         struct strbuf buf = STRBUF_INIT;
 770         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 771         return strbuf_detach(&buf, NULL);
 772 }
 773
 774 /* http_request() targets */
 775 #define HTTP_REQUEST_STRBUF     0
 776 #define HTTP_REQUEST_FILE       1
 777
 778 static int http_request(const char *url, void *result, int target, int options)
 779 {
 780         struct active_request_slot *slot;
 781         struct slot_results results;
 782         struct curl_slist *headers = NULL;
 783         struct strbuf buf = STRBUF_INIT;
 784         int ret;
 785
 786         slot = get_active_slot();
 787         slot->results = &results;
 788         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 789
 790         if (result == NULL) {
 791                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 792         } else {
 793                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 794                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 795
 796                 if (target == HTTP_REQUEST_FILE) {
 797                         long posn = ftell(result);
 798                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 799                                          fwrite);
 800                         if (posn > 0) {
 801                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 802                                 headers = curl_slist_append(headers, buf.buf);
 803                                 strbuf_reset(&buf);
 804                         }
 805                         slot->local = result;
 806                 } else
 807                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 808                                          fwrite_buffer);
 809         }
 810
 811         strbuf_addstr(&buf, "Pragma:");
 812         if (options & HTTP_NO_CACHE)
 813                 strbuf_addstr(&buf, " no-cache");
 814
 815         headers = curl_slist_append(headers, buf.buf);
 816
 817         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 818         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 819
 820         if (start_active_slot(slot)) {
 821                 run_active_slot(slot);
 822                 if (results.curl_result == CURLE_OK)
 823                         ret = HTTP_OK;
 824                 else if (missing_target(&results))
 825                         ret = HTTP_MISSING_TARGET;
 826                 else if (results.http_code == 401) {
 827                         if (user_name) {
 828                                 ret = HTTP_NOAUTH;
 829                         } else {
 830                                 /*
 831                                  * git_getpass is needed here because its very likely stdin/stdout are
 832                                  * pipes to our parent process.  So we instead need to use /dev/tty,
 833                                  * but that is non-portable.  Using git_getpass() can at least be stubbed
 834                                  * on other platforms with a different implementation if/when necessary.
 835                                  */
 836                                 user_name = xstrdup(git_getpass("Username: "));
 837                                 init_curl_http_auth(slot->curl);
 838                                 ret = HTTP_REAUTH;
 839                         }
 840                 } else
 841                         ret = HTTP_ERROR;
 842         } else {
 843                 error("Unable to start HTTP request for %s", url);
 844                 ret = HTTP_START_FAILED;
 845         }
 846
 847         slot->local = NULL;
 848         curl_slist_free_all(headers);
 849         strbuf_release(&buf);
 850
 851         return ret;
 852 }
 853
 854 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 855 {
 856         int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 857         if (http_ret == HTTP_REAUTH) {
 858                 http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 859         }
 860         return http_ret;
 861 }
 862
 863 /*
 864  * Downloads an url and stores the result in the given file.
 865  *
 866  * If a previous interrupted download is detected (i.e. a previous temporary
 867  * file is still around) the download is resumed.
 868  */
 869 static int http_get_file(const char *url, const char *filename, int options)
 870 {
 871         int ret;
 872         struct strbuf tmpfile = STRBUF_INIT;
 873         FILE *result;
 874
 875         strbuf_addf(&tmpfile, "%s.temp", filename);
 876         result = fopen(tmpfile.buf, "a");
 877         if (! result) {
 878                 error("Unable to open local file %s", tmpfile.buf);
 879                 ret = HTTP_ERROR;
 880                 goto cleanup;
 881         }
 882
 883         ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 884         fclose(result);
 885
 886         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 887                 ret = HTTP_ERROR;
 888 cleanup:
 889         strbuf_release(&tmpfile);
 890         return ret;
 891 }
 892
 893 int http_error(const char *url, int ret)
 894 {
 895         /* http_request has already handled HTTP_START_FAILED. */
 896         if (ret != HTTP_START_FAILED)
 897                 error("%s while accessing %s\n", curl_errorstr, url);
 898
 899         return ret;
 900 }
 901
 902 int http_fetch_ref(const char *base, struct ref *ref)
 903 {
 904         char *url;
 905         struct strbuf buffer = STRBUF_INIT;
 906         int ret = -1;
 907
 908         url = quote_ref_url(base, ref->name);
 909         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 910                 strbuf_rtrim(&buffer);
 911                 if (buffer.len == 40)
 912                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 913                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 914                         ref->symref = xstrdup(buffer.buf + 5);
 915                         ret = 0;
 916                 }
 917         }
 918
 919         strbuf_release(&buffer);
 920         free(url);
 921         return ret;
 922 }
 923
 924 /* Helpers for fetching packs */
 925 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 926 {
 927         char *url, *tmp;
 928         struct strbuf buf = STRBUF_INIT;
 929
 930         if (http_is_verbose)
 931                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 932
 933         end_url_with_slash(&buf, base_url);
 934         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 935         url = strbuf_detach(&buf, NULL);
 936
 937         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 938         tmp = strbuf_detach(&buf, NULL);
 939
 940         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 941                 error("Unable to get pack index %s\n", url);
 942                 free(tmp);
 943                 tmp = NULL;
 944         }
 945
 946         free(url);
 947         return tmp;
 948 }
 949
 950 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 951         unsigned char *sha1, const char *base_url)
 952 {
 953         struct packed_git *new_pack;
 954         char *tmp_idx = NULL;
 955         int ret;
 956
 957         if (has_pack_index(sha1)) {
 958                 new_pack = parse_pack_index(sha1, NULL);
 959                 if (!new_pack)
 960                         return -1; /* parse_pack_index() already issued error message */
 961                 goto add_pack;
 962         }
 963
 964         tmp_idx = fetch_pack_index(sha1, base_url);
 965         if (!tmp_idx)
 966                 return -1;
 967
 968         new_pack = parse_pack_index(sha1, tmp_idx);
 969         if (!new_pack) {
 970                 unlink(tmp_idx);
 971                 free(tmp_idx);
 972
 973                 return -1; /* parse_pack_index() already issued error message */
 974         }
 975
 976         ret = verify_pack_index(new_pack);
 977         if (!ret) {
 978                 close_pack_index(new_pack);
 979                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 980         }
 981         free(tmp_idx);
 982         if (ret)
 983                 return -1;
 984
 985 add_pack:
 986         new_pack->next = *packs_head;
 987         *packs_head = new_pack;
 988         return 0;
 989 }
 990
 991 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
 992 {
 993         int ret = 0, i = 0;
 994         char *url, *data;
 995         struct strbuf buf = STRBUF_INIT;
 996         unsigned char sha1[20];
 997
 998         end_url_with_slash(&buf, base_url);
 999         strbuf_addstr(&buf, "objects/info/packs");
1000         url = strbuf_detach(&buf, NULL);
1001
1002         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1003         if (ret != HTTP_OK)
1004                 goto cleanup;
1005
1006         data = buf.buf;
1007         while (i < buf.len) {
1008                 switch (data[i]) {
1009                 case 'P':
1010                         i++;
1011                         if (i + 52 <= buf.len &&
1012                             !prefixcmp(data + i, " pack-") &&
1013                             !prefixcmp(data + i + 46, ".pack\n")) {
1014                                 get_sha1_hex(data + i + 6, sha1);
1015                                 fetch_and_setup_pack_index(packs_head, sha1,
1016                                                       base_url);
1017                                 i += 51;
1018                                 break;
1019                         }
1020                 default:
1021                         while (i < buf.len && data[i] != '\n')
1022                                 i++;
1023                 }
1024                 i++;
1025         }
1026
1027 cleanup:
1028         free(url);
1029         return ret;
1030 }
1031
1032 void release_http_pack_request(struct http_pack_request *preq)
1033 {
1034         if (preq->packfile != NULL) {
1035                 fclose(preq->packfile);
1036                 preq->packfile = NULL;
1037                 preq->slot->local = NULL;
1038         }
1039         if (preq->range_header != NULL) {
1040                 curl_slist_free_all(preq->range_header);
1041                 preq->range_header = NULL;
1042         }
1043         preq->slot = NULL;
1044         free(preq->url);
1045 }
1046
1047 int finish_http_pack_request(struct http_pack_request *preq)
1048 {
1049         struct packed_git **lst;
1050         struct packed_git *p = preq->target;
1051         char *tmp_idx;
1052         struct child_process ip;
1053         const char *ip_argv[8];
1054
1055         close_pack_index(p);
1056
1057         fclose(preq->packfile);
1058         preq->packfile = NULL;
1059         preq->slot->local = NULL;
1060
1061         lst = preq->lst;
1062         while (*lst != p)
1063                 lst = &((*lst)->next);
1064         *lst = (*lst)->next;
1065
1066         tmp_idx = xstrdup(preq->tmpfile);
1067         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1068                ".idx.temp");
1069
1070         ip_argv[0] = "index-pack";
1071         ip_argv[1] = "-o";
1072         ip_argv[2] = tmp_idx;
1073         ip_argv[3] = preq->tmpfile;
1074         ip_argv[4] = NULL;
1075
1076         memset(&ip, 0, sizeof(ip));
1077         ip.argv = ip_argv;
1078         ip.git_cmd = 1;
1079         ip.no_stdin = 1;
1080         ip.no_stdout = 1;
1081
1082         if (run_command(&ip)) {
1083                 unlink(preq->tmpfile);
1084                 unlink(tmp_idx);
1085                 free(tmp_idx);
1086                 return -1;
1087         }
1088
1089         unlink(sha1_pack_index_name(p->sha1));
1090
1091         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1092          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1093                 free(tmp_idx);
1094                 return -1;
1095         }
1096
1097         install_packed_git(p);
1098         free(tmp_idx);
1099         return 0;
1100 }
1101
1102 struct http_pack_request *new_http_pack_request(
1103         struct packed_git *target, const char *base_url)
1104 {
1105         long prev_posn = 0;
1106         char range[RANGE_HEADER_SIZE];
1107         struct strbuf buf = STRBUF_INIT;
1108         struct http_pack_request *preq;
1109
1110         preq = xmalloc(sizeof(*preq));
1111         preq->target = target;
1112         preq->range_header = NULL;
1113
1114         end_url_with_slash(&buf, base_url);
1115         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1116                 sha1_to_hex(target->sha1));
1117         preq->url = strbuf_detach(&buf, NULL);
1118
1119         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1120                 sha1_pack_name(target->sha1));
1121         preq->packfile = fopen(preq->tmpfile, "a");
1122         if (!preq->packfile) {
1123                 error("Unable to open local file %s for pack",
1124                       preq->tmpfile);
1125                 goto abort;
1126         }
1127
1128         preq->slot = get_active_slot();
1129         preq->slot->local = preq->packfile;
1130         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1131         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1132         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1133         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1134                 no_pragma_header);
1135
1136         /*
1137          * If there is data present from a previous transfer attempt,
1138          * resume where it left off
1139          */
1140         prev_posn = ftell(preq->packfile);
1141         if (prev_posn>0) {
1142                 if (http_is_verbose)
1143                         fprintf(stderr,
1144                                 "Resuming fetch of pack %s at byte %ld\n",
1145                                 sha1_to_hex(target->sha1), prev_posn);
1146                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1147                 preq->range_header = curl_slist_append(NULL, range);
1148                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1149                         preq->range_header);
1150         }
1151
1152         return preq;
1153
1154 abort:
1155         free(preq->url);
1156         free(preq);
1157         return NULL;
1158 }
1159
1160 /* Helpers for fetching objects (loose) */
1161 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
1162                                void *data)
1163 {
1164         unsigned char expn[4096];
1165         size_t size = eltsize * nmemb;
1166         int posn = 0;
1167         struct http_object_request *freq =
1168                 (struct http_object_request *)data;
1169         do {
1170                 ssize_t retval = xwrite(freq->localfile,
1171                                         (char *) ptr + posn, size - posn);
1172                 if (retval < 0)
1173                         return posn;
1174                 posn += retval;
1175         } while (posn < size);
1176
1177         freq->stream.avail_in = size;
1178         freq->stream.next_in = ptr;
1179         do {
1180                 freq->stream.next_out = expn;
1181                 freq->stream.avail_out = sizeof(expn);
1182                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1183                 git_SHA1_Update(&freq->c, expn,
1184                                 sizeof(expn) - freq->stream.avail_out);
1185         } while (freq->stream.avail_in && freq->zret == Z_OK);
1186         data_received++;
1187         return size;
1188 }
1189
1190 struct http_object_request *new_http_object_request(const char *base_url,
1191         unsigned char *sha1)
1192 {
1193         char *hex = sha1_to_hex(sha1);
1194         char *filename;
1195         char prevfile[PATH_MAX];
1196         int prevlocal;
1197         unsigned char prev_buf[PREV_BUF_SIZE];
1198         ssize_t prev_read = 0;
1199         long prev_posn = 0;
1200         char range[RANGE_HEADER_SIZE];
1201         struct curl_slist *range_header = NULL;
1202         struct http_object_request *freq;
1203
1204         freq = xmalloc(sizeof(*freq));
1205         hashcpy(freq->sha1, sha1);
1206         freq->localfile = -1;
1207
1208         filename = sha1_file_name(sha1);
1209         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1210                  "%s.temp", filename);
1211
1212         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1213         unlink_or_warn(prevfile);
1214         rename(freq->tmpfile, prevfile);
1215         unlink_or_warn(freq->tmpfile);
1216
1217         if (freq->localfile != -1)
1218                 error("fd leakage in start: %d", freq->localfile);
1219         freq->localfile = open(freq->tmpfile,
1220                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1221         /*
1222          * This could have failed due to the "lazy directory creation";
1223          * try to mkdir the last path component.
1224          */
1225         if (freq->localfile < 0 && errno == ENOENT) {
1226                 char *dir = strrchr(freq->tmpfile, '/');
1227                 if (dir) {
1228                         *dir = 0;
1229                         mkdir(freq->tmpfile, 0777);
1230                         *dir = '/';
1231                 }
1232                 freq->localfile = open(freq->tmpfile,
1233                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1234         }
1235
1236         if (freq->localfile < 0) {
1237                 error("Couldn't create temporary file %s: %s",
1238                       freq->tmpfile, strerror(errno));
1239                 goto abort;
1240         }
1241
1242         memset(&freq->stream, 0, sizeof(freq->stream));
1243
1244         git_inflate_init(&freq->stream);
1245
1246         git_SHA1_Init(&freq->c);
1247
1248         freq->url = get_remote_object_url(base_url, hex, 0);
1249
1250         /*
1251          * If a previous temp file is present, process what was already
1252          * fetched.
1253          */
1254         prevlocal = open(prevfile, O_RDONLY);
1255         if (prevlocal != -1) {
1256                 do {
1257                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1258                         if (prev_read>0) {
1259                                 if (fwrite_sha1_file(prev_buf,
1260                                                      1,
1261                                                      prev_read,
1262                                                      freq) == prev_read) {
1263                                         prev_posn += prev_read;
1264                                 } else {
1265                                         prev_read = -1;
1266                                 }
1267                         }
1268                 } while (prev_read > 0);
1269                 close(prevlocal);
1270         }
1271         unlink_or_warn(prevfile);
1272
1273         /*
1274          * Reset inflate/SHA1 if there was an error reading the previous temp
1275          * file; also rewind to the beginning of the local file.
1276          */
1277         if (prev_read == -1) {
1278                 memset(&freq->stream, 0, sizeof(freq->stream));
1279                 git_inflate_init(&freq->stream);
1280                 git_SHA1_Init(&freq->c);
1281                 if (prev_posn>0) {
1282                         prev_posn = 0;
1283                         lseek(freq->localfile, 0, SEEK_SET);
1284                         if (ftruncate(freq->localfile, 0) < 0) {
1285                                 error("Couldn't truncate temporary file %s: %s",
1286                                           freq->tmpfile, strerror(errno));
1287                                 goto abort;
1288                         }
1289                 }
1290         }
1291
1292         freq->slot = get_active_slot();
1293
1294         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1295         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1296         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1297         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1298         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1299
1300         /*
1301          * If we have successfully processed data from a previous fetch
1302          * attempt, only fetch the data we don't already have.
1303          */
1304         if (prev_posn>0) {
1305                 if (http_is_verbose)
1306                         fprintf(stderr,
1307                                 "Resuming fetch of object %s at byte %ld\n",
1308                                 hex, prev_posn);
1309                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1310                 range_header = curl_slist_append(range_header, range);
1311                 curl_easy_setopt(freq->slot->curl,
1312                                  CURLOPT_HTTPHEADER, range_header);
1313         }
1314
1315         return freq;
1316
1317 abort:
1318         free(filename);
1319         free(freq->url);
1320         free(freq);
1321         return NULL;
1322 }
1323
1324 void process_http_object_request(struct http_object_request *freq)
1325 {
1326         if (freq->slot == NULL)
1327                 return;
1328         freq->curl_result = freq->slot->curl_result;
1329         freq->http_code = freq->slot->http_code;
1330         freq->slot = NULL;
1331 }
1332
1333 int finish_http_object_request(struct http_object_request *freq)
1334 {
1335         struct stat st;
1336
1337         close(freq->localfile);
1338         freq->localfile = -1;
1339
1340         process_http_object_request(freq);
1341
1342         if (freq->http_code == 416) {
1343                 warning("requested range invalid; we may already have all the data.");
1344         } else if (freq->curl_result != CURLE_OK) {
1345                 if (stat(freq->tmpfile, &st) == 0)
1346                         if (st.st_size == 0)
1347                                 unlink_or_warn(freq->tmpfile);
1348                 return -1;
1349         }
1350
1351         git_inflate_end(&freq->stream);
1352         git_SHA1_Final(freq->real_sha1, &freq->c);
1353         if (freq->zret != Z_STREAM_END) {
1354                 unlink_or_warn(freq->tmpfile);
1355                 return -1;
1356         }
1357         if (hashcmp(freq->sha1, freq->real_sha1)) {
1358                 unlink_or_warn(freq->tmpfile);
1359                 return -1;
1360         }
1361         freq->rename =
1362                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1363
1364         return freq->rename;
1365 }
1366
1367 void abort_http_object_request(struct http_object_request *freq)
1368 {
1369         unlink_or_warn(freq->tmpfile);
1370
1371         release_http_object_request(freq);
1372 }
1373
1374 void release_http_object_request(struct http_object_request *freq)
1375 {
1376         if (freq->localfile != -1) {
1377                 close(freq->localfile);
1378                 freq->localfile = -1;
1379         }
1380         if (freq->url != NULL) {
1381                 free(freq->url);
1382                 freq->url = NULL;
1383         }
1384         if (freq->slot != NULL) {
1385                 freq->slot->callback_func = NULL;
1386                 freq->slot->callback_data = NULL;
1387                 release_active_slot(freq->slot);
1388                 freq->slot = NULL;
1389         }
1390 }