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 #include "url.h"
   6
   7 int data_received;
   8 int active_requests;
   9 int http_is_verbose;
  10 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  11
  12 #if LIBCURL_VERSION_NUM >= 0x070a06
  13 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  14 #endif
  15
  16 static int min_curl_sessions = 1;
  17 static int curl_session_count;
  18 #ifdef USE_CURL_MULTI
  19 static int max_requests = -1;
  20 static CURLM *curlm;
  21 #endif
  22 #ifndef NO_CURL_EASY_DUPHANDLE
  23 static CURL *curl_default;
  24 #endif
  25
  26 #define PREV_BUF_SIZE 4096
  27 #define RANGE_HEADER_SIZE 30
  28
  29 char curl_errorstr[CURL_ERROR_SIZE];
  30
  31 static int curl_ssl_verify = -1;
  32 static const char *ssl_cert;
  33 #if LIBCURL_VERSION_NUM >= 0x070903
  34 static const char *ssl_key;
  35 #endif
  36 #if LIBCURL_VERSION_NUM >= 0x070908
  37 static const char *ssl_capath;
  38 #endif
  39 static const char *ssl_cainfo;
  40 static long curl_low_speed_limit = -1;
  41 static long curl_low_speed_time = -1;
  42 static int curl_ftp_no_epsv;
  43 static const char *curl_http_proxy;
  44 static char *user_name, *user_pass;
  45 static const char *user_agent;
  46
  47 #if LIBCURL_VERSION_NUM >= 0x071700
  48 /* Use CURLOPT_KEYPASSWD as is */
  49 #elif LIBCURL_VERSION_NUM >= 0x070903
  50 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  51 #else
  52 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  53 #endif
  54
  55 static char *ssl_cert_password;
  56 static int ssl_cert_password_required;
  57
  58 static struct curl_slist *pragma_header;
  59 static struct curl_slist *no_pragma_header;
  60
  61 static struct active_request_slot *active_queue_head;
  62
  63 size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  64 {
  65         size_t size = eltsize * nmemb;
  66         struct buffer *buffer = buffer_;
  67
  68         if (size > buffer->buf.len - buffer->posn)
  69                 size = buffer->buf.len - buffer->posn;
  70         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  71         buffer->posn += size;
  72
  73         return size;
  74 }
  75
  76 #ifndef NO_CURL_IOCTL
  77 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  78 {
  79         struct buffer *buffer = clientp;
  80
  81         switch (cmd) {
  82         case CURLIOCMD_NOP:
  83                 return CURLIOE_OK;
  84
  85         case CURLIOCMD_RESTARTREAD:
  86                 buffer->posn = 0;
  87                 return CURLIOE_OK;
  88
  89         default:
  90                 return CURLIOE_UNKNOWNCMD;
  91         }
  92 }
  93 #endif
  94
  95 size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  96 {
  97         size_t size = eltsize * nmemb;
  98         struct strbuf *buffer = buffer_;
  99
 100         strbuf_add(buffer, ptr, size);
 101         data_received++;
 102         return size;
 103 }
 104
 105 size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 106 {
 107         data_received++;
 108         return eltsize * nmemb;
 109 }
 110
 111 #ifdef USE_CURL_MULTI
 112 static void process_curl_messages(void)
 113 {
 114         int num_messages;
 115         struct active_request_slot *slot;
 116         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 117
 118         while (curl_message != NULL) {
 119                 if (curl_message->msg == CURLMSG_DONE) {
 120                         int curl_result = curl_message->data.result;
 121                         slot = active_queue_head;
 122                         while (slot != NULL &&
 123                                slot->curl != curl_message->easy_handle)
 124                                 slot = slot->next;
 125                         if (slot != NULL) {
 126                                 curl_multi_remove_handle(curlm, slot->curl);
 127                                 slot->curl_result = curl_result;
 128                                 finish_active_slot(slot);
 129                         } else {
 130                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 131                         }
 132                 } else {
 133                         fprintf(stderr, "Unknown CURL message received: %d\n",
 134                                 (int)curl_message->msg);
 135                 }
 136                 curl_message = curl_multi_info_read(curlm, &num_messages);
 137         }
 138 }
 139 #endif
 140
 141 static int http_options(const char *var, const char *value, void *cb)
 142 {
 143         if (!strcmp("http.sslverify", var)) {
 144                 curl_ssl_verify = git_config_bool(var, value);
 145                 return 0;
 146         }
 147         if (!strcmp("http.sslcert", var))
 148                 return git_config_string(&ssl_cert, var, value);
 149 #if LIBCURL_VERSION_NUM >= 0x070903
 150         if (!strcmp("http.sslkey", var))
 151                 return git_config_string(&ssl_key, var, value);
 152 #endif
 153 #if LIBCURL_VERSION_NUM >= 0x070908
 154         if (!strcmp("http.sslcapath", var))
 155                 return git_config_string(&ssl_capath, var, value);
 156 #endif
 157         if (!strcmp("http.sslcainfo", var))
 158                 return git_config_string(&ssl_cainfo, var, value);
 159         if (!strcmp("http.sslcertpasswordprotected", var)) {
 160                 if (git_config_bool(var, value))
 161                         ssl_cert_password_required = 1;
 162                 return 0;
 163         }
 164         if (!strcmp("http.minsessions", var)) {
 165                 min_curl_sessions = git_config_int(var, value);
 166 #ifndef USE_CURL_MULTI
 167                 if (min_curl_sessions > 1)
 168                         min_curl_sessions = 1;
 169 #endif
 170                 return 0;
 171         }
 172 #ifdef USE_CURL_MULTI
 173         if (!strcmp("http.maxrequests", var)) {
 174                 max_requests = git_config_int(var, value);
 175                 return 0;
 176         }
 177 #endif
 178         if (!strcmp("http.lowspeedlimit", var)) {
 179                 curl_low_speed_limit = (long)git_config_int(var, value);
 180                 return 0;
 181         }
 182         if (!strcmp("http.lowspeedtime", var)) {
 183                 curl_low_speed_time = (long)git_config_int(var, value);
 184                 return 0;
 185         }
 186
 187         if (!strcmp("http.noepsv", var)) {
 188                 curl_ftp_no_epsv = git_config_bool(var, value);
 189                 return 0;
 190         }
 191         if (!strcmp("http.proxy", var))
 192                 return git_config_string(&curl_http_proxy, var, value);
 193
 194         if (!strcmp("http.postbuffer", var)) {
 195                 http_post_buffer = git_config_int(var, value);
 196                 if (http_post_buffer < LARGE_PACKET_MAX)
 197                         http_post_buffer = LARGE_PACKET_MAX;
 198                 return 0;
 199         }
 200
 201         if (!strcmp("http.useragent", var))
 202                 return git_config_string(&user_agent, var, value);
 203
 204         /* Fall back on the default ones */
 205         return git_default_config(var, value, cb);
 206 }
 207
 208 static void init_curl_http_auth(CURL *result)
 209 {
 210         if (user_name) {
 211                 struct strbuf up = STRBUF_INIT;
 212                 if (!user_pass)
 213                         user_pass = xstrdup(git_getpass("Password: "));
 214                 strbuf_addf(&up, "%s:%s", user_name, user_pass);
 215                 curl_easy_setopt(result, CURLOPT_USERPWD,
 216                                  strbuf_detach(&up, NULL));
 217         }
 218 }
 219
 220 static int has_cert_password(void)
 221 {
 222         if (ssl_cert_password != NULL)
 223                 return 1;
 224         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 225                 return 0;
 226         /* Only prompt the user once. */
 227         ssl_cert_password_required = -1;
 228         ssl_cert_password = git_getpass("Certificate Password: ");
 229         if (ssl_cert_password != NULL) {
 230                 ssl_cert_password = xstrdup(ssl_cert_password);
 231                 return 1;
 232         } else
 233                 return 0;
 234 }
 235
 236 static CURL *get_curl_handle(void)
 237 {
 238         CURL *result = curl_easy_init();
 239
 240         if (!curl_ssl_verify) {
 241                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 242                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 243         } else {
 244                 /* Verify authenticity of the peer's certificate */
 245                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 246                 /* The name in the cert must match whom we tried to connect */
 247                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 248         }
 249
 250 #if LIBCURL_VERSION_NUM >= 0x070907
 251         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 252 #endif
 253 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 254         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 255 #endif
 256
 257         init_curl_http_auth(result);
 258
 259         if (ssl_cert != NULL)
 260                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 261         if (has_cert_password())
 262                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 263 #if LIBCURL_VERSION_NUM >= 0x070903
 264         if (ssl_key != NULL)
 265                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 266 #endif
 267 #if LIBCURL_VERSION_NUM >= 0x070908
 268         if (ssl_capath != NULL)
 269                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 270 #endif
 271         if (ssl_cainfo != NULL)
 272                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 273         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 274
 275         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 276                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 277                                  curl_low_speed_limit);
 278                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 279                                  curl_low_speed_time);
 280         }
 281
 282         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 283
 284         if (getenv("GIT_CURL_VERBOSE"))
 285                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 286
 287         curl_easy_setopt(result, CURLOPT_USERAGENT,
 288                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 289
 290         if (curl_ftp_no_epsv)
 291                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 292
 293         if (curl_http_proxy)
 294                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 295
 296         return result;
 297 }
 298
 299 static void http_auth_init(const char *url)
 300 {
 301         char *at, *colon, *cp, *slash;
 302         int len;
 303
 304         cp = strstr(url, "://");
 305         if (!cp)
 306                 return;
 307
 308         /*
 309          * Ok, the URL looks like "proto://something".  Which one?
 310          * "proto://<user>:<pass>@<host>/...",
 311          * "proto://<user>@<host>/...", or just
 312          * "proto://<host>/..."?
 313          */
 314         cp += 3;
 315         at = strchr(cp, '@');
 316         colon = strchr(cp, ':');
 317         slash = strchrnul(cp, '/');
 318         if (!at || slash <= at)
 319                 return; /* No credentials */
 320         if (!colon || at <= colon) {
 321                 /* Only username */
 322                 len = at - cp;
 323                 user_name = xmalloc(len + 1);
 324                 memcpy(user_name, cp, len);
 325                 user_name[len] = '\0';
 326                 user_pass = NULL;
 327         } else {
 328                 len = colon - cp;
 329                 user_name = xmalloc(len + 1);
 330                 memcpy(user_name, cp, len);
 331                 user_name[len] = '\0';
 332                 len = at - (colon + 1);
 333                 user_pass = xmalloc(len + 1);
 334                 memcpy(user_pass, colon + 1, len);
 335                 user_pass[len] = '\0';
 336         }
 337 }
 338
 339 static void set_from_env(const char **var, const char *envname)
 340 {
 341         const char *val = getenv(envname);
 342         if (val)
 343                 *var = val;
 344 }
 345
 346 void http_init(struct remote *remote)
 347 {
 348         char *low_speed_limit;
 349         char *low_speed_time;
 350
 351         http_is_verbose = 0;
 352
 353         git_config(http_options, NULL);
 354
 355         curl_global_init(CURL_GLOBAL_ALL);
 356
 357         if (remote && remote->http_proxy)
 358                 curl_http_proxy = xstrdup(remote->http_proxy);
 359
 360         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 361         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 362
 363 #ifdef USE_CURL_MULTI
 364         {
 365                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 366                 if (http_max_requests != NULL)
 367                         max_requests = atoi(http_max_requests);
 368         }
 369
 370         curlm = curl_multi_init();
 371         if (curlm == NULL) {
 372                 fprintf(stderr, "Error creating curl multi handle.\n");
 373                 exit(1);
 374         }
 375 #endif
 376
 377         if (getenv("GIT_SSL_NO_VERIFY"))
 378                 curl_ssl_verify = 0;
 379
 380         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 381 #if LIBCURL_VERSION_NUM >= 0x070903
 382         set_from_env(&ssl_key, "GIT_SSL_KEY");
 383 #endif
 384 #if LIBCURL_VERSION_NUM >= 0x070908
 385         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 386 #endif
 387         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 388
 389         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 390
 391         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 392         if (low_speed_limit != NULL)
 393                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 394         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 395         if (low_speed_time != NULL)
 396                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 397
 398         if (curl_ssl_verify == -1)
 399                 curl_ssl_verify = 1;
 400
 401         curl_session_count = 0;
 402 #ifdef USE_CURL_MULTI
 403         if (max_requests < 1)
 404                 max_requests = DEFAULT_MAX_REQUESTS;
 405 #endif
 406
 407         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 408                 curl_ftp_no_epsv = 1;
 409
 410         if (remote && remote->url && remote->url[0]) {
 411                 http_auth_init(remote->url[0]);
 412                 if (!ssl_cert_password_required &&
 413                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 414                     !prefixcmp(remote->url[0], "https://"))
 415                         ssl_cert_password_required = 1;
 416         }
 417
 418 #ifndef NO_CURL_EASY_DUPHANDLE
 419         curl_default = get_curl_handle();
 420 #endif
 421 }
 422
 423 void http_cleanup(void)
 424 {
 425         struct active_request_slot *slot = active_queue_head;
 426
 427         while (slot != NULL) {
 428                 struct active_request_slot *next = slot->next;
 429                 if (slot->curl != NULL) {
 430 #ifdef USE_CURL_MULTI
 431                         curl_multi_remove_handle(curlm, slot->curl);
 432 #endif
 433                         curl_easy_cleanup(slot->curl);
 434                 }
 435                 free(slot);
 436                 slot = next;
 437         }
 438         active_queue_head = NULL;
 439
 440 #ifndef NO_CURL_EASY_DUPHANDLE
 441         curl_easy_cleanup(curl_default);
 442 #endif
 443
 444 #ifdef USE_CURL_MULTI
 445         curl_multi_cleanup(curlm);
 446 #endif
 447         curl_global_cleanup();
 448
 449         curl_slist_free_all(pragma_header);
 450         pragma_header = NULL;
 451
 452         curl_slist_free_all(no_pragma_header);
 453         no_pragma_header = NULL;
 454
 455         if (curl_http_proxy) {
 456                 free((void *)curl_http_proxy);
 457                 curl_http_proxy = NULL;
 458         }
 459
 460         if (ssl_cert_password != NULL) {
 461                 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 462                 free(ssl_cert_password);
 463                 ssl_cert_password = NULL;
 464         }
 465         ssl_cert_password_required = 0;
 466 }
 467
 468 struct active_request_slot *get_active_slot(void)
 469 {
 470         struct active_request_slot *slot = active_queue_head;
 471         struct active_request_slot *newslot;
 472
 473 #ifdef USE_CURL_MULTI
 474         int num_transfers;
 475
 476         /* Wait for a slot to open up if the queue is full */
 477         while (active_requests >= max_requests) {
 478                 curl_multi_perform(curlm, &num_transfers);
 479                 if (num_transfers < active_requests)
 480                         process_curl_messages();
 481         }
 482 #endif
 483
 484         while (slot != NULL && slot->in_use)
 485                 slot = slot->next;
 486
 487         if (slot == NULL) {
 488                 newslot = xmalloc(sizeof(*newslot));
 489                 newslot->curl = NULL;
 490                 newslot->in_use = 0;
 491                 newslot->next = NULL;
 492
 493                 slot = active_queue_head;
 494                 if (slot == NULL) {
 495                         active_queue_head = newslot;
 496                 } else {
 497                         while (slot->next != NULL)
 498                                 slot = slot->next;
 499                         slot->next = newslot;
 500                 }
 501                 slot = newslot;
 502         }
 503
 504         if (slot->curl == NULL) {
 505 #ifdef NO_CURL_EASY_DUPHANDLE
 506                 slot->curl = get_curl_handle();
 507 #else
 508                 slot->curl = curl_easy_duphandle(curl_default);
 509 #endif
 510                 curl_session_count++;
 511         }
 512
 513         active_requests++;
 514         slot->in_use = 1;
 515         slot->local = NULL;
 516         slot->results = NULL;
 517         slot->finished = NULL;
 518         slot->callback_data = NULL;
 519         slot->callback_func = NULL;
 520         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 521         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 522         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 523         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 524         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 525         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 526         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 527
 528         return slot;
 529 }
 530
 531 int start_active_slot(struct active_request_slot *slot)
 532 {
 533 #ifdef USE_CURL_MULTI
 534         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 535         int num_transfers;
 536
 537         if (curlm_result != CURLM_OK &&
 538             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 539                 active_requests--;
 540                 slot->in_use = 0;
 541                 return 0;
 542         }
 543
 544         /*
 545          * We know there must be something to do, since we just added
 546          * something.
 547          */
 548         curl_multi_perform(curlm, &num_transfers);
 549 #endif
 550         return 1;
 551 }
 552
 553 #ifdef USE_CURL_MULTI
 554 struct fill_chain {
 555         void *data;
 556         int (*fill)(void *);
 557         struct fill_chain *next;
 558 };
 559
 560 static struct fill_chain *fill_cfg;
 561
 562 void add_fill_function(void *data, int (*fill)(void *))
 563 {
 564         struct fill_chain *new = xmalloc(sizeof(*new));
 565         struct fill_chain **linkp = &fill_cfg;
 566         new->data = data;
 567         new->fill = fill;
 568         new->next = NULL;
 569         while (*linkp)
 570                 linkp = &(*linkp)->next;
 571         *linkp = new;
 572 }
 573
 574 void fill_active_slots(void)
 575 {
 576         struct active_request_slot *slot = active_queue_head;
 577
 578         while (active_requests < max_requests) {
 579                 struct fill_chain *fill;
 580                 for (fill = fill_cfg; fill; fill = fill->next)
 581                         if (fill->fill(fill->data))
 582                                 break;
 583
 584                 if (!fill)
 585                         break;
 586         }
 587
 588         while (slot != NULL) {
 589                 if (!slot->in_use && slot->curl != NULL
 590                         && curl_session_count > min_curl_sessions) {
 591                         curl_easy_cleanup(slot->curl);
 592                         slot->curl = NULL;
 593                         curl_session_count--;
 594                 }
 595                 slot = slot->next;
 596         }
 597 }
 598
 599 void step_active_slots(void)
 600 {
 601         int num_transfers;
 602         CURLMcode curlm_result;
 603
 604         do {
 605                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 606         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 607         if (num_transfers < active_requests) {
 608                 process_curl_messages();
 609                 fill_active_slots();
 610         }
 611 }
 612 #endif
 613
 614 void run_active_slot(struct active_request_slot *slot)
 615 {
 616 #ifdef USE_CURL_MULTI
 617         long last_pos = 0;
 618         long current_pos;
 619         fd_set readfds;
 620         fd_set writefds;
 621         fd_set excfds;
 622         int max_fd;
 623         struct timeval select_timeout;
 624         int finished = 0;
 625
 626         slot->finished = &finished;
 627         while (!finished) {
 628                 data_received = 0;
 629                 step_active_slots();
 630
 631                 if (!data_received && slot->local != NULL) {
 632                         current_pos = ftell(slot->local);
 633                         if (current_pos > last_pos)
 634                                 data_received++;
 635                         last_pos = current_pos;
 636                 }
 637
 638                 if (slot->in_use && !data_received) {
 639                         max_fd = 0;
 640                         FD_ZERO(&readfds);
 641                         FD_ZERO(&writefds);
 642                         FD_ZERO(&excfds);
 643                         select_timeout.tv_sec = 0;
 644                         select_timeout.tv_usec = 50000;
 645                         select(max_fd, &readfds, &writefds,
 646                                &excfds, &select_timeout);
 647                 }
 648         }
 649 #else
 650         while (slot->in_use) {
 651                 slot->curl_result = curl_easy_perform(slot->curl);
 652                 finish_active_slot(slot);
 653         }
 654 #endif
 655 }
 656
 657 static void closedown_active_slot(struct active_request_slot *slot)
 658 {
 659         active_requests--;
 660         slot->in_use = 0;
 661 }
 662
 663 static void release_active_slot(struct active_request_slot *slot)
 664 {
 665         closedown_active_slot(slot);
 666         if (slot->curl && curl_session_count > min_curl_sessions) {
 667 #ifdef USE_CURL_MULTI
 668                 curl_multi_remove_handle(curlm, slot->curl);
 669 #endif
 670                 curl_easy_cleanup(slot->curl);
 671                 slot->curl = NULL;
 672                 curl_session_count--;
 673         }
 674 #ifdef USE_CURL_MULTI
 675         fill_active_slots();
 676 #endif
 677 }
 678
 679 void finish_active_slot(struct active_request_slot *slot)
 680 {
 681         closedown_active_slot(slot);
 682         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 683
 684         if (slot->finished != NULL)
 685                 (*slot->finished) = 1;
 686
 687         /* Store slot results so they can be read after the slot is reused */
 688         if (slot->results != NULL) {
 689                 slot->results->curl_result = slot->curl_result;
 690                 slot->results->http_code = slot->http_code;
 691         }
 692
 693         /* Run callback if appropriate */
 694         if (slot->callback_func != NULL)
 695                 slot->callback_func(slot->callback_data);
 696 }
 697
 698 void finish_all_active_slots(void)
 699 {
 700         struct active_request_slot *slot = active_queue_head;
 701
 702         while (slot != NULL)
 703                 if (slot->in_use) {
 704                         run_active_slot(slot);
 705                         slot = active_queue_head;
 706                 } else {
 707                         slot = slot->next;
 708                 }
 709 }
 710
 711 /* Helpers for modifying and creating URLs */
 712 static inline int needs_quote(int ch)
 713 {
 714         if (((ch >= 'A') && (ch <= 'Z'))
 715                         || ((ch >= 'a') && (ch <= 'z'))
 716                         || ((ch >= '0') && (ch <= '9'))
 717                         || (ch == '/')
 718                         || (ch == '-')
 719                         || (ch == '.'))
 720                 return 0;
 721         return 1;
 722 }
 723
 724 static inline int hex(int v)
 725 {
 726         if (v < 10)
 727                 return '0' + v;
 728         else
 729                 return 'A' + v - 10;
 730 }
 731
 732 static char *quote_ref_url(const char *base, const char *ref)
 733 {
 734         struct strbuf buf = STRBUF_INIT;
 735         const char *cp;
 736         int ch;
 737
 738         end_url_with_slash(&buf, base);
 739
 740         for (cp = ref; (ch = *cp) != 0; cp++)
 741                 if (needs_quote(ch))
 742                         strbuf_addf(&buf, "%%%02x", ch);
 743                 else
 744                         strbuf_addch(&buf, *cp);
 745
 746         return strbuf_detach(&buf, NULL);
 747 }
 748
 749 void append_remote_object_url(struct strbuf *buf, const char *url,
 750                               const char *hex,
 751                               int only_two_digit_prefix)
 752 {
 753         end_url_with_slash(buf, url);
 754
 755         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 756         if (!only_two_digit_prefix)
 757                 strbuf_addf(buf, "%s", hex+2);
 758 }
 759
 760 char *get_remote_object_url(const char *url, const char *hex,
 761                             int only_two_digit_prefix)
 762 {
 763         struct strbuf buf = STRBUF_INIT;
 764         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 765         return strbuf_detach(&buf, NULL);
 766 }
 767
 768 /* http_request() targets */
 769 #define HTTP_REQUEST_STRBUF     0
 770 #define HTTP_REQUEST_FILE       1
 771
 772 static int http_request(const char *url, void *result, int target, int options)
 773 {
 774         struct active_request_slot *slot;
 775         struct slot_results results;
 776         struct curl_slist *headers = NULL;
 777         struct strbuf buf = STRBUF_INIT;
 778         int ret;
 779
 780         slot = get_active_slot();
 781         slot->results = &results;
 782         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 783
 784         if (result == NULL) {
 785                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 786         } else {
 787                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 788                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 789
 790                 if (target == HTTP_REQUEST_FILE) {
 791                         long posn = ftell(result);
 792                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 793                                          fwrite);
 794                         if (posn > 0) {
 795                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 796                                 headers = curl_slist_append(headers, buf.buf);
 797                                 strbuf_reset(&buf);
 798                         }
 799                         slot->local = result;
 800                 } else
 801                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 802                                          fwrite_buffer);
 803         }
 804
 805         strbuf_addstr(&buf, "Pragma:");
 806         if (options & HTTP_NO_CACHE)
 807                 strbuf_addstr(&buf, " no-cache");
 808
 809         headers = curl_slist_append(headers, buf.buf);
 810
 811         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 812         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 813
 814         if (start_active_slot(slot)) {
 815                 run_active_slot(slot);
 816                 if (results.curl_result == CURLE_OK)
 817                         ret = HTTP_OK;
 818                 else if (missing_target(&results))
 819                         ret = HTTP_MISSING_TARGET;
 820                 else if (results.http_code == 401) {
 821                         if (user_name) {
 822                                 ret = HTTP_NOAUTH;
 823                         } else {
 824                                 /*
 825                                  * git_getpass is needed here because its very likely stdin/stdout are
 826                                  * pipes to our parent process.  So we instead need to use /dev/tty,
 827                                  * but that is non-portable.  Using git_getpass() can at least be stubbed
 828                                  * on other platforms with a different implementation if/when necessary.
 829                                  */
 830                                 user_name = xstrdup(git_getpass("Username: "));
 831                                 init_curl_http_auth(slot->curl);
 832                                 ret = HTTP_REAUTH;
 833                         }
 834                 } else
 835                         ret = HTTP_ERROR;
 836         } else {
 837                 error("Unable to start HTTP request for %s", url);
 838                 ret = HTTP_START_FAILED;
 839         }
 840
 841         slot->local = NULL;
 842         curl_slist_free_all(headers);
 843         strbuf_release(&buf);
 844
 845         return ret;
 846 }
 847
 848 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 849 {
 850         int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 851         if (http_ret == HTTP_REAUTH) {
 852                 http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 853         }
 854         return http_ret;
 855 }
 856
 857 /*
 858  * Downloads an url and stores the result in the given file.
 859  *
 860  * If a previous interrupted download is detected (i.e. a previous temporary
 861  * file is still around) the download is resumed.
 862  */
 863 static int http_get_file(const char *url, const char *filename, int options)
 864 {
 865         int ret;
 866         struct strbuf tmpfile = STRBUF_INIT;
 867         FILE *result;
 868
 869         strbuf_addf(&tmpfile, "%s.temp", filename);
 870         result = fopen(tmpfile.buf, "a");
 871         if (! result) {
 872                 error("Unable to open local file %s", tmpfile.buf);
 873                 ret = HTTP_ERROR;
 874                 goto cleanup;
 875         }
 876
 877         ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 878         fclose(result);
 879
 880         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 881                 ret = HTTP_ERROR;
 882 cleanup:
 883         strbuf_release(&tmpfile);
 884         return ret;
 885 }
 886
 887 int http_error(const char *url, int ret)
 888 {
 889         /* http_request has already handled HTTP_START_FAILED. */
 890         if (ret != HTTP_START_FAILED)
 891                 error("%s while accessing %s\n", curl_errorstr, url);
 892
 893         return ret;
 894 }
 895
 896 int http_fetch_ref(const char *base, struct ref *ref)
 897 {
 898         char *url;
 899         struct strbuf buffer = STRBUF_INIT;
 900         int ret = -1;
 901
 902         url = quote_ref_url(base, ref->name);
 903         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 904                 strbuf_rtrim(&buffer);
 905                 if (buffer.len == 40)
 906                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 907                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 908                         ref->symref = xstrdup(buffer.buf + 5);
 909                         ret = 0;
 910                 }
 911         }
 912
 913         strbuf_release(&buffer);
 914         free(url);
 915         return ret;
 916 }
 917
 918 /* Helpers for fetching packs */
 919 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 920 {
 921         char *url, *tmp;
 922         struct strbuf buf = STRBUF_INIT;
 923
 924         if (http_is_verbose)
 925                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 926
 927         end_url_with_slash(&buf, base_url);
 928         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 929         url = strbuf_detach(&buf, NULL);
 930
 931         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 932         tmp = strbuf_detach(&buf, NULL);
 933
 934         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 935                 error("Unable to get pack index %s\n", url);
 936                 free(tmp);
 937                 tmp = NULL;
 938         }
 939
 940         free(url);
 941         return tmp;
 942 }
 943
 944 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 945         unsigned char *sha1, const char *base_url)
 946 {
 947         struct packed_git *new_pack;
 948         char *tmp_idx = NULL;
 949         int ret;
 950
 951         if (has_pack_index(sha1)) {
 952                 new_pack = parse_pack_index(sha1, NULL);
 953                 if (!new_pack)
 954                         return -1; /* parse_pack_index() already issued error message */
 955                 goto add_pack;
 956         }
 957
 958         tmp_idx = fetch_pack_index(sha1, base_url);
 959         if (!tmp_idx)
 960                 return -1;
 961
 962         new_pack = parse_pack_index(sha1, tmp_idx);
 963         if (!new_pack) {
 964                 unlink(tmp_idx);
 965                 free(tmp_idx);
 966
 967                 return -1; /* parse_pack_index() already issued error message */
 968         }
 969
 970         ret = verify_pack_index(new_pack);
 971         if (!ret) {
 972                 close_pack_index(new_pack);
 973                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 974         }
 975         free(tmp_idx);
 976         if (ret)
 977                 return -1;
 978
 979 add_pack:
 980         new_pack->next = *packs_head;
 981         *packs_head = new_pack;
 982         return 0;
 983 }
 984
 985 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
 986 {
 987         int ret = 0, i = 0;
 988         char *url, *data;
 989         struct strbuf buf = STRBUF_INIT;
 990         unsigned char sha1[20];
 991
 992         end_url_with_slash(&buf, base_url);
 993         strbuf_addstr(&buf, "objects/info/packs");
 994         url = strbuf_detach(&buf, NULL);
 995
 996         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
 997         if (ret != HTTP_OK)
 998                 goto cleanup;
 999
1000         data = buf.buf;
1001         while (i < buf.len) {
1002                 switch (data[i]) {
1003                 case 'P':
1004                         i++;
1005                         if (i + 52 <= buf.len &&
1006                             !prefixcmp(data + i, " pack-") &&
1007                             !prefixcmp(data + i + 46, ".pack\n")) {
1008                                 get_sha1_hex(data + i + 6, sha1);
1009                                 fetch_and_setup_pack_index(packs_head, sha1,
1010                                                       base_url);
1011                                 i += 51;
1012                                 break;
1013                         }
1014                 default:
1015                         while (i < buf.len && data[i] != '\n')
1016                                 i++;
1017                 }
1018                 i++;
1019         }
1020
1021 cleanup:
1022         free(url);
1023         return ret;
1024 }
1025
1026 void release_http_pack_request(struct http_pack_request *preq)
1027 {
1028         if (preq->packfile != NULL) {
1029                 fclose(preq->packfile);
1030                 preq->packfile = NULL;
1031                 preq->slot->local = NULL;
1032         }
1033         if (preq->range_header != NULL) {
1034                 curl_slist_free_all(preq->range_header);
1035                 preq->range_header = NULL;
1036         }
1037         preq->slot = NULL;
1038         free(preq->url);
1039 }
1040
1041 int finish_http_pack_request(struct http_pack_request *preq)
1042 {
1043         struct packed_git **lst;
1044         struct packed_git *p = preq->target;
1045         char *tmp_idx;
1046         struct child_process ip;
1047         const char *ip_argv[8];
1048
1049         close_pack_index(p);
1050
1051         fclose(preq->packfile);
1052         preq->packfile = NULL;
1053         preq->slot->local = NULL;
1054
1055         lst = preq->lst;
1056         while (*lst != p)
1057                 lst = &((*lst)->next);
1058         *lst = (*lst)->next;
1059
1060         tmp_idx = xstrdup(preq->tmpfile);
1061         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1062                ".idx.temp");
1063
1064         ip_argv[0] = "index-pack";
1065         ip_argv[1] = "-o";
1066         ip_argv[2] = tmp_idx;
1067         ip_argv[3] = preq->tmpfile;
1068         ip_argv[4] = NULL;
1069
1070         memset(&ip, 0, sizeof(ip));
1071         ip.argv = ip_argv;
1072         ip.git_cmd = 1;
1073         ip.no_stdin = 1;
1074         ip.no_stdout = 1;
1075
1076         if (run_command(&ip)) {
1077                 unlink(preq->tmpfile);
1078                 unlink(tmp_idx);
1079                 free(tmp_idx);
1080                 return -1;
1081         }
1082
1083         unlink(sha1_pack_index_name(p->sha1));
1084
1085         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1086          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1087                 free(tmp_idx);
1088                 return -1;
1089         }
1090
1091         install_packed_git(p);
1092         free(tmp_idx);
1093         return 0;
1094 }
1095
1096 struct http_pack_request *new_http_pack_request(
1097         struct packed_git *target, const char *base_url)
1098 {
1099         long prev_posn = 0;
1100         char range[RANGE_HEADER_SIZE];
1101         struct strbuf buf = STRBUF_INIT;
1102         struct http_pack_request *preq;
1103
1104         preq = xmalloc(sizeof(*preq));
1105         preq->target = target;
1106         preq->range_header = NULL;
1107
1108         end_url_with_slash(&buf, base_url);
1109         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1110                 sha1_to_hex(target->sha1));
1111         preq->url = strbuf_detach(&buf, NULL);
1112
1113         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1114                 sha1_pack_name(target->sha1));
1115         preq->packfile = fopen(preq->tmpfile, "a");
1116         if (!preq->packfile) {
1117                 error("Unable to open local file %s for pack",
1118                       preq->tmpfile);
1119                 goto abort;
1120         }
1121
1122         preq->slot = get_active_slot();
1123         preq->slot->local = preq->packfile;
1124         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1125         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1126         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1127         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1128                 no_pragma_header);
1129
1130         /*
1131          * If there is data present from a previous transfer attempt,
1132          * resume where it left off
1133          */
1134         prev_posn = ftell(preq->packfile);
1135         if (prev_posn>0) {
1136                 if (http_is_verbose)
1137                         fprintf(stderr,
1138                                 "Resuming fetch of pack %s at byte %ld\n",
1139                                 sha1_to_hex(target->sha1), prev_posn);
1140                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1141                 preq->range_header = curl_slist_append(NULL, range);
1142                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1143                         preq->range_header);
1144         }
1145
1146         return preq;
1147
1148 abort:
1149         free(preq->url);
1150         free(preq);
1151         return NULL;
1152 }
1153
1154 /* Helpers for fetching objects (loose) */
1155 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
1156                                void *data)
1157 {
1158         unsigned char expn[4096];
1159         size_t size = eltsize * nmemb;
1160         int posn = 0;
1161         struct http_object_request *freq =
1162                 (struct http_object_request *)data;
1163         do {
1164                 ssize_t retval = xwrite(freq->localfile,
1165                                         (char *) ptr + posn, size - posn);
1166                 if (retval < 0)
1167                         return posn;
1168                 posn += retval;
1169         } while (posn < size);
1170
1171         freq->stream.avail_in = size;
1172         freq->stream.next_in = ptr;
1173         do {
1174                 freq->stream.next_out = expn;
1175                 freq->stream.avail_out = sizeof(expn);
1176                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1177                 git_SHA1_Update(&freq->c, expn,
1178                                 sizeof(expn) - freq->stream.avail_out);
1179         } while (freq->stream.avail_in && freq->zret == Z_OK);
1180         data_received++;
1181         return size;
1182 }
1183
1184 struct http_object_request *new_http_object_request(const char *base_url,
1185         unsigned char *sha1)
1186 {
1187         char *hex = sha1_to_hex(sha1);
1188         char *filename;
1189         char prevfile[PATH_MAX];
1190         int prevlocal;
1191         unsigned char prev_buf[PREV_BUF_SIZE];
1192         ssize_t prev_read = 0;
1193         long prev_posn = 0;
1194         char range[RANGE_HEADER_SIZE];
1195         struct curl_slist *range_header = NULL;
1196         struct http_object_request *freq;
1197
1198         freq = xmalloc(sizeof(*freq));
1199         hashcpy(freq->sha1, sha1);
1200         freq->localfile = -1;
1201
1202         filename = sha1_file_name(sha1);
1203         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1204                  "%s.temp", filename);
1205
1206         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1207         unlink_or_warn(prevfile);
1208         rename(freq->tmpfile, prevfile);
1209         unlink_or_warn(freq->tmpfile);
1210
1211         if (freq->localfile != -1)
1212                 error("fd leakage in start: %d", freq->localfile);
1213         freq->localfile = open(freq->tmpfile,
1214                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1215         /*
1216          * This could have failed due to the "lazy directory creation";
1217          * try to mkdir the last path component.
1218          */
1219         if (freq->localfile < 0 && errno == ENOENT) {
1220                 char *dir = strrchr(freq->tmpfile, '/');
1221                 if (dir) {
1222                         *dir = 0;
1223                         mkdir(freq->tmpfile, 0777);
1224                         *dir = '/';
1225                 }
1226                 freq->localfile = open(freq->tmpfile,
1227                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1228         }
1229
1230         if (freq->localfile < 0) {
1231                 error("Couldn't create temporary file %s: %s",
1232                       freq->tmpfile, strerror(errno));
1233                 goto abort;
1234         }
1235
1236         memset(&freq->stream, 0, sizeof(freq->stream));
1237
1238         git_inflate_init(&freq->stream);
1239
1240         git_SHA1_Init(&freq->c);
1241
1242         freq->url = get_remote_object_url(base_url, hex, 0);
1243
1244         /*
1245          * If a previous temp file is present, process what was already
1246          * fetched.
1247          */
1248         prevlocal = open(prevfile, O_RDONLY);
1249         if (prevlocal != -1) {
1250                 do {
1251                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1252                         if (prev_read>0) {
1253                                 if (fwrite_sha1_file(prev_buf,
1254                                                      1,
1255                                                      prev_read,
1256                                                      freq) == prev_read) {
1257                                         prev_posn += prev_read;
1258                                 } else {
1259                                         prev_read = -1;
1260                                 }
1261                         }
1262                 } while (prev_read > 0);
1263                 close(prevlocal);
1264         }
1265         unlink_or_warn(prevfile);
1266
1267         /*
1268          * Reset inflate/SHA1 if there was an error reading the previous temp
1269          * file; also rewind to the beginning of the local file.
1270          */
1271         if (prev_read == -1) {
1272                 memset(&freq->stream, 0, sizeof(freq->stream));
1273                 git_inflate_init(&freq->stream);
1274                 git_SHA1_Init(&freq->c);
1275                 if (prev_posn>0) {
1276                         prev_posn = 0;
1277                         lseek(freq->localfile, 0, SEEK_SET);
1278                         if (ftruncate(freq->localfile, 0) < 0) {
1279                                 error("Couldn't truncate temporary file %s: %s",
1280                                           freq->tmpfile, strerror(errno));
1281                                 goto abort;
1282                         }
1283                 }
1284         }
1285
1286         freq->slot = get_active_slot();
1287
1288         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1289         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1290         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1291         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1292         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1293
1294         /*
1295          * If we have successfully processed data from a previous fetch
1296          * attempt, only fetch the data we don't already have.
1297          */
1298         if (prev_posn>0) {
1299                 if (http_is_verbose)
1300                         fprintf(stderr,
1301                                 "Resuming fetch of object %s at byte %ld\n",
1302                                 hex, prev_posn);
1303                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1304                 range_header = curl_slist_append(range_header, range);
1305                 curl_easy_setopt(freq->slot->curl,
1306                                  CURLOPT_HTTPHEADER, range_header);
1307         }
1308
1309         return freq;
1310
1311 abort:
1312         free(filename);
1313         free(freq->url);
1314         free(freq);
1315         return NULL;
1316 }
1317
1318 void process_http_object_request(struct http_object_request *freq)
1319 {
1320         if (freq->slot == NULL)
1321                 return;
1322         freq->curl_result = freq->slot->curl_result;
1323         freq->http_code = freq->slot->http_code;
1324         freq->slot = NULL;
1325 }
1326
1327 int finish_http_object_request(struct http_object_request *freq)
1328 {
1329         struct stat st;
1330
1331         close(freq->localfile);
1332         freq->localfile = -1;
1333
1334         process_http_object_request(freq);
1335
1336         if (freq->http_code == 416) {
1337                 warning("requested range invalid; we may already have all the data.");
1338         } else if (freq->curl_result != CURLE_OK) {
1339                 if (stat(freq->tmpfile, &st) == 0)
1340                         if (st.st_size == 0)
1341                                 unlink_or_warn(freq->tmpfile);
1342                 return -1;
1343         }
1344
1345         git_inflate_end(&freq->stream);
1346         git_SHA1_Final(freq->real_sha1, &freq->c);
1347         if (freq->zret != Z_STREAM_END) {
1348                 unlink_or_warn(freq->tmpfile);
1349                 return -1;
1350         }
1351         if (hashcmp(freq->sha1, freq->real_sha1)) {
1352                 unlink_or_warn(freq->tmpfile);
1353                 return -1;
1354         }
1355         freq->rename =
1356                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1357
1358         return freq->rename;
1359 }
1360
1361 void abort_http_object_request(struct http_object_request *freq)
1362 {
1363         unlink_or_warn(freq->tmpfile);
1364
1365         release_http_object_request(freq);
1366 }
1367
1368 void release_http_object_request(struct http_object_request *freq)
1369 {
1370         if (freq->localfile != -1) {
1371                 close(freq->localfile);
1372                 freq->localfile = -1;
1373         }
1374         if (freq->url != NULL) {
1375                 free(freq->url);
1376                 freq->url = NULL;
1377         }
1378         if (freq->slot != NULL) {
1379                 freq->slot->callback_func = NULL;
1380                 freq->slot->callback_data = NULL;
1381                 release_active_slot(freq->slot);
1382                 freq->slot = NULL;
1383         }
1384 }