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 #if LIBCURL_VERSION_NUM >= 0x071301
 283         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 284 #elif LIBCURL_VERSION_NUM >= 0x071101
 285         curl_easy_setopt(result, CURLOPT_POST301, 1);
 286 #endif
 287
 288         if (getenv("GIT_CURL_VERBOSE"))
 289                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 290
 291         curl_easy_setopt(result, CURLOPT_USERAGENT,
 292                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 293
 294         if (curl_ftp_no_epsv)
 295                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 296
 297         if (curl_http_proxy)
 298                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 299
 300         return result;
 301 }
 302
 303 static void http_auth_init(const char *url)
 304 {
 305         char *at, *colon, *cp, *slash;
 306         int len;
 307
 308         cp = strstr(url, "://");
 309         if (!cp)
 310                 return;
 311
 312         /*
 313          * Ok, the URL looks like "proto://something".  Which one?
 314          * "proto://<user>:<pass>@<host>/...",
 315          * "proto://<user>@<host>/...", or just
 316          * "proto://<host>/..."?
 317          */
 318         cp += 3;
 319         at = strchr(cp, '@');
 320         colon = strchr(cp, ':');
 321         slash = strchrnul(cp, '/');
 322         if (!at || slash <= at)
 323                 return; /* No credentials */
 324         if (!colon || at <= colon) {
 325                 /* Only username */
 326                 len = at - cp;
 327                 user_name = xmalloc(len + 1);
 328                 memcpy(user_name, cp, len);
 329                 user_name[len] = '\0';
 330                 user_pass = NULL;
 331         } else {
 332                 len = colon - cp;
 333                 user_name = xmalloc(len + 1);
 334                 memcpy(user_name, cp, len);
 335                 user_name[len] = '\0';
 336                 len = at - (colon + 1);
 337                 user_pass = xmalloc(len + 1);
 338                 memcpy(user_pass, colon + 1, len);
 339                 user_pass[len] = '\0';
 340         }
 341 }
 342
 343 static void set_from_env(const char **var, const char *envname)
 344 {
 345         const char *val = getenv(envname);
 346         if (val)
 347                 *var = val;
 348 }
 349
 350 void http_init(struct remote *remote)
 351 {
 352         char *low_speed_limit;
 353         char *low_speed_time;
 354
 355         http_is_verbose = 0;
 356
 357         git_config(http_options, NULL);
 358
 359         curl_global_init(CURL_GLOBAL_ALL);
 360
 361         if (remote && remote->http_proxy)
 362                 curl_http_proxy = xstrdup(remote->http_proxy);
 363
 364         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 365         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 366
 367 #ifdef USE_CURL_MULTI
 368         {
 369                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 370                 if (http_max_requests != NULL)
 371                         max_requests = atoi(http_max_requests);
 372         }
 373
 374         curlm = curl_multi_init();
 375         if (curlm == NULL) {
 376                 fprintf(stderr, "Error creating curl multi handle.\n");
 377                 exit(1);
 378         }
 379 #endif
 380
 381         if (getenv("GIT_SSL_NO_VERIFY"))
 382                 curl_ssl_verify = 0;
 383
 384         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 385 #if LIBCURL_VERSION_NUM >= 0x070903
 386         set_from_env(&ssl_key, "GIT_SSL_KEY");
 387 #endif
 388 #if LIBCURL_VERSION_NUM >= 0x070908
 389         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 390 #endif
 391         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 392
 393         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 394
 395         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 396         if (low_speed_limit != NULL)
 397                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 398         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 399         if (low_speed_time != NULL)
 400                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 401
 402         if (curl_ssl_verify == -1)
 403                 curl_ssl_verify = 1;
 404
 405         curl_session_count = 0;
 406 #ifdef USE_CURL_MULTI
 407         if (max_requests < 1)
 408                 max_requests = DEFAULT_MAX_REQUESTS;
 409 #endif
 410
 411         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 412                 curl_ftp_no_epsv = 1;
 413
 414         if (remote && remote->url && remote->url[0]) {
 415                 http_auth_init(remote->url[0]);
 416                 if (!ssl_cert_password_required &&
 417                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 418                     !prefixcmp(remote->url[0], "https://"))
 419                         ssl_cert_password_required = 1;
 420         }
 421
 422 #ifndef NO_CURL_EASY_DUPHANDLE
 423         curl_default = get_curl_handle();
 424 #endif
 425 }
 426
 427 void http_cleanup(void)
 428 {
 429         struct active_request_slot *slot = active_queue_head;
 430
 431         while (slot != NULL) {
 432                 struct active_request_slot *next = slot->next;
 433                 if (slot->curl != NULL) {
 434 #ifdef USE_CURL_MULTI
 435                         curl_multi_remove_handle(curlm, slot->curl);
 436 #endif
 437                         curl_easy_cleanup(slot->curl);
 438                 }
 439                 free(slot);
 440                 slot = next;
 441         }
 442         active_queue_head = NULL;
 443
 444 #ifndef NO_CURL_EASY_DUPHANDLE
 445         curl_easy_cleanup(curl_default);
 446 #endif
 447
 448 #ifdef USE_CURL_MULTI
 449         curl_multi_cleanup(curlm);
 450 #endif
 451         curl_global_cleanup();
 452
 453         curl_slist_free_all(pragma_header);
 454         pragma_header = NULL;
 455
 456         curl_slist_free_all(no_pragma_header);
 457         no_pragma_header = NULL;
 458
 459         if (curl_http_proxy) {
 460                 free((void *)curl_http_proxy);
 461                 curl_http_proxy = NULL;
 462         }
 463
 464         if (ssl_cert_password != NULL) {
 465                 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 466                 free(ssl_cert_password);
 467                 ssl_cert_password = NULL;
 468         }
 469         ssl_cert_password_required = 0;
 470 }
 471
 472 struct active_request_slot *get_active_slot(void)
 473 {
 474         struct active_request_slot *slot = active_queue_head;
 475         struct active_request_slot *newslot;
 476
 477 #ifdef USE_CURL_MULTI
 478         int num_transfers;
 479
 480         /* Wait for a slot to open up if the queue is full */
 481         while (active_requests >= max_requests) {
 482                 curl_multi_perform(curlm, &num_transfers);
 483                 if (num_transfers < active_requests)
 484                         process_curl_messages();
 485         }
 486 #endif
 487
 488         while (slot != NULL && slot->in_use)
 489                 slot = slot->next;
 490
 491         if (slot == NULL) {
 492                 newslot = xmalloc(sizeof(*newslot));
 493                 newslot->curl = NULL;
 494                 newslot->in_use = 0;
 495                 newslot->next = NULL;
 496
 497                 slot = active_queue_head;
 498                 if (slot == NULL) {
 499                         active_queue_head = newslot;
 500                 } else {
 501                         while (slot->next != NULL)
 502                                 slot = slot->next;
 503                         slot->next = newslot;
 504                 }
 505                 slot = newslot;
 506         }
 507
 508         if (slot->curl == NULL) {
 509 #ifdef NO_CURL_EASY_DUPHANDLE
 510                 slot->curl = get_curl_handle();
 511 #else
 512                 slot->curl = curl_easy_duphandle(curl_default);
 513 #endif
 514                 curl_session_count++;
 515         }
 516
 517         active_requests++;
 518         slot->in_use = 1;
 519         slot->local = NULL;
 520         slot->results = NULL;
 521         slot->finished = NULL;
 522         slot->callback_data = NULL;
 523         slot->callback_func = NULL;
 524         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 525         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 526         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 527         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 528         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 529         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 530         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 531
 532         return slot;
 533 }
 534
 535 int start_active_slot(struct active_request_slot *slot)
 536 {
 537 #ifdef USE_CURL_MULTI
 538         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 539         int num_transfers;
 540
 541         if (curlm_result != CURLM_OK &&
 542             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 543                 active_requests--;
 544                 slot->in_use = 0;
 545                 return 0;
 546         }
 547
 548         /*
 549          * We know there must be something to do, since we just added
 550          * something.
 551          */
 552         curl_multi_perform(curlm, &num_transfers);
 553 #endif
 554         return 1;
 555 }
 556
 557 #ifdef USE_CURL_MULTI
 558 struct fill_chain {
 559         void *data;
 560         int (*fill)(void *);
 561         struct fill_chain *next;
 562 };
 563
 564 static struct fill_chain *fill_cfg;
 565
 566 void add_fill_function(void *data, int (*fill)(void *))
 567 {
 568         struct fill_chain *new = xmalloc(sizeof(*new));
 569         struct fill_chain **linkp = &fill_cfg;
 570         new->data = data;
 571         new->fill = fill;
 572         new->next = NULL;
 573         while (*linkp)
 574                 linkp = &(*linkp)->next;
 575         *linkp = new;
 576 }
 577
 578 void fill_active_slots(void)
 579 {
 580         struct active_request_slot *slot = active_queue_head;
 581
 582         while (active_requests < max_requests) {
 583                 struct fill_chain *fill;
 584                 for (fill = fill_cfg; fill; fill = fill->next)
 585                         if (fill->fill(fill->data))
 586                                 break;
 587
 588                 if (!fill)
 589                         break;
 590         }
 591
 592         while (slot != NULL) {
 593                 if (!slot->in_use && slot->curl != NULL
 594                         && curl_session_count > min_curl_sessions) {
 595                         curl_easy_cleanup(slot->curl);
 596                         slot->curl = NULL;
 597                         curl_session_count--;
 598                 }
 599                 slot = slot->next;
 600         }
 601 }
 602
 603 void step_active_slots(void)
 604 {
 605         int num_transfers;
 606         CURLMcode curlm_result;
 607
 608         do {
 609                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 610         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 611         if (num_transfers < active_requests) {
 612                 process_curl_messages();
 613                 fill_active_slots();
 614         }
 615 }
 616 #endif
 617
 618 void run_active_slot(struct active_request_slot *slot)
 619 {
 620 #ifdef USE_CURL_MULTI
 621         long last_pos = 0;
 622         long current_pos;
 623         fd_set readfds;
 624         fd_set writefds;
 625         fd_set excfds;
 626         int max_fd;
 627         struct timeval select_timeout;
 628         int finished = 0;
 629
 630         slot->finished = &finished;
 631         while (!finished) {
 632                 data_received = 0;
 633                 step_active_slots();
 634
 635                 if (!data_received && slot->local != NULL) {
 636                         current_pos = ftell(slot->local);
 637                         if (current_pos > last_pos)
 638                                 data_received++;
 639                         last_pos = current_pos;
 640                 }
 641
 642                 if (slot->in_use && !data_received) {
 643                         max_fd = 0;
 644                         FD_ZERO(&readfds);
 645                         FD_ZERO(&writefds);
 646                         FD_ZERO(&excfds);
 647                         select_timeout.tv_sec = 0;
 648                         select_timeout.tv_usec = 50000;
 649                         select(max_fd, &readfds, &writefds,
 650                                &excfds, &select_timeout);
 651                 }
 652         }
 653 #else
 654         while (slot->in_use) {
 655                 slot->curl_result = curl_easy_perform(slot->curl);
 656                 finish_active_slot(slot);
 657         }
 658 #endif
 659 }
 660
 661 static void closedown_active_slot(struct active_request_slot *slot)
 662 {
 663         active_requests--;
 664         slot->in_use = 0;
 665 }
 666
 667 static void release_active_slot(struct active_request_slot *slot)
 668 {
 669         closedown_active_slot(slot);
 670         if (slot->curl && curl_session_count > min_curl_sessions) {
 671 #ifdef USE_CURL_MULTI
 672                 curl_multi_remove_handle(curlm, slot->curl);
 673 #endif
 674                 curl_easy_cleanup(slot->curl);
 675                 slot->curl = NULL;
 676                 curl_session_count--;
 677         }
 678 #ifdef USE_CURL_MULTI
 679         fill_active_slots();
 680 #endif
 681 }
 682
 683 void finish_active_slot(struct active_request_slot *slot)
 684 {
 685         closedown_active_slot(slot);
 686         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 687
 688         if (slot->finished != NULL)
 689                 (*slot->finished) = 1;
 690
 691         /* Store slot results so they can be read after the slot is reused */
 692         if (slot->results != NULL) {
 693                 slot->results->curl_result = slot->curl_result;
 694                 slot->results->http_code = slot->http_code;
 695         }
 696
 697         /* Run callback if appropriate */
 698         if (slot->callback_func != NULL)
 699                 slot->callback_func(slot->callback_data);
 700 }
 701
 702 void finish_all_active_slots(void)
 703 {
 704         struct active_request_slot *slot = active_queue_head;
 705
 706         while (slot != NULL)
 707                 if (slot->in_use) {
 708                         run_active_slot(slot);
 709                         slot = active_queue_head;
 710                 } else {
 711                         slot = slot->next;
 712                 }
 713 }
 714
 715 /* Helpers for modifying and creating URLs */
 716 static inline int needs_quote(int ch)
 717 {
 718         if (((ch >= 'A') && (ch <= 'Z'))
 719                         || ((ch >= 'a') && (ch <= 'z'))
 720                         || ((ch >= '0') && (ch <= '9'))
 721                         || (ch == '/')
 722                         || (ch == '-')
 723                         || (ch == '.'))
 724                 return 0;
 725         return 1;
 726 }
 727
 728 static inline int hex(int v)
 729 {
 730         if (v < 10)
 731                 return '0' + v;
 732         else
 733                 return 'A' + v - 10;
 734 }
 735
 736 void end_url_with_slash(struct strbuf *buf, const char *url)
 737 {
 738         strbuf_addstr(buf, url);
 739         if (buf->len && buf->buf[buf->len - 1] != '/')
 740                 strbuf_addstr(buf, "/");
 741 }
 742
 743 static char *quote_ref_url(const char *base, const char *ref)
 744 {
 745         struct strbuf buf = STRBUF_INIT;
 746         const char *cp;
 747         int ch;
 748
 749         end_url_with_slash(&buf, base);
 750
 751         for (cp = ref; (ch = *cp) != 0; cp++)
 752                 if (needs_quote(ch))
 753                         strbuf_addf(&buf, "%%%02x", ch);
 754                 else
 755                         strbuf_addch(&buf, *cp);
 756
 757         return strbuf_detach(&buf, NULL);
 758 }
 759
 760 void append_remote_object_url(struct strbuf *buf, const char *url,
 761                               const char *hex,
 762                               int only_two_digit_prefix)
 763 {
 764         end_url_with_slash(buf, url);
 765
 766         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 767         if (!only_two_digit_prefix)
 768                 strbuf_addf(buf, "%s", hex+2);
 769 }
 770
 771 char *get_remote_object_url(const char *url, const char *hex,
 772                             int only_two_digit_prefix)
 773 {
 774         struct strbuf buf = STRBUF_INIT;
 775         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 776         return strbuf_detach(&buf, NULL);
 777 }
 778
 779 /* http_request() targets */
 780 #define HTTP_REQUEST_STRBUF     0
 781 #define HTTP_REQUEST_FILE       1
 782
 783 static int http_request(const char *url, void *result, int target, int options)
 784 {
 785         struct active_request_slot *slot;
 786         struct slot_results results;
 787         struct curl_slist *headers = NULL;
 788         struct strbuf buf = STRBUF_INIT;
 789         int ret;
 790
 791         slot = get_active_slot();
 792         slot->results = &results;
 793         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 794
 795         if (result == NULL) {
 796                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 797         } else {
 798                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 799                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 800
 801                 if (target == HTTP_REQUEST_FILE) {
 802                         long posn = ftell(result);
 803                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 804                                          fwrite);
 805                         if (posn > 0) {
 806                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 807                                 headers = curl_slist_append(headers, buf.buf);
 808                                 strbuf_reset(&buf);
 809                         }
 810                         slot->local = result;
 811                 } else
 812                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 813                                          fwrite_buffer);
 814         }
 815
 816         strbuf_addstr(&buf, "Pragma:");
 817         if (options & HTTP_NO_CACHE)
 818                 strbuf_addstr(&buf, " no-cache");
 819
 820         headers = curl_slist_append(headers, buf.buf);
 821
 822         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 823         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 824
 825         if (start_active_slot(slot)) {
 826                 run_active_slot(slot);
 827                 if (results.curl_result == CURLE_OK)
 828                         ret = HTTP_OK;
 829                 else if (missing_target(&results))
 830                         ret = HTTP_MISSING_TARGET;
 831                 else if (results.http_code == 401) {
 832                         if (user_name) {
 833                                 ret = HTTP_NOAUTH;
 834                         } else {
 835                                 /*
 836                                  * git_getpass is needed here because its very likely stdin/stdout are
 837                                  * pipes to our parent process.  So we instead need to use /dev/tty,
 838                                  * but that is non-portable.  Using git_getpass() can at least be stubbed
 839                                  * on other platforms with a different implementation if/when necessary.
 840                                  */
 841                                 user_name = xstrdup(git_getpass("Username: "));
 842                                 init_curl_http_auth(slot->curl);
 843                                 ret = HTTP_REAUTH;
 844                         }
 845                 } else
 846                         ret = HTTP_ERROR;
 847         } else {
 848                 error("Unable to start HTTP request for %s", url);
 849                 ret = HTTP_START_FAILED;
 850         }
 851
 852         slot->local = NULL;
 853         curl_slist_free_all(headers);
 854         strbuf_release(&buf);
 855
 856         return ret;
 857 }
 858
 859 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 860 {
 861         int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 862         if (http_ret == HTTP_REAUTH) {
 863                 http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 864         }
 865         return http_ret;
 866 }
 867
 868 /*
 869  * Downloads an url and stores the result in the given file.
 870  *
 871  * If a previous interrupted download is detected (i.e. a previous temporary
 872  * file is still around) the download is resumed.
 873  */
 874 static int http_get_file(const char *url, const char *filename, int options)
 875 {
 876         int ret;
 877         struct strbuf tmpfile = STRBUF_INIT;
 878         FILE *result;
 879
 880         strbuf_addf(&tmpfile, "%s.temp", filename);
 881         result = fopen(tmpfile.buf, "a");
 882         if (! result) {
 883                 error("Unable to open local file %s", tmpfile.buf);
 884                 ret = HTTP_ERROR;
 885                 goto cleanup;
 886         }
 887
 888         ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 889         fclose(result);
 890
 891         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 892                 ret = HTTP_ERROR;
 893 cleanup:
 894         strbuf_release(&tmpfile);
 895         return ret;
 896 }
 897
 898 int http_error(const char *url, int ret)
 899 {
 900         /* http_request has already handled HTTP_START_FAILED. */
 901         if (ret != HTTP_START_FAILED)
 902                 error("%s while accessing %s\n", curl_errorstr, url);
 903
 904         return ret;
 905 }
 906
 907 int http_fetch_ref(const char *base, struct ref *ref)
 908 {
 909         char *url;
 910         struct strbuf buffer = STRBUF_INIT;
 911         int ret = -1;
 912
 913         url = quote_ref_url(base, ref->name);
 914         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 915                 strbuf_rtrim(&buffer);
 916                 if (buffer.len == 40)
 917                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 918                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 919                         ref->symref = xstrdup(buffer.buf + 5);
 920                         ret = 0;
 921                 }
 922         }
 923
 924         strbuf_release(&buffer);
 925         free(url);
 926         return ret;
 927 }
 928
 929 /* Helpers for fetching packs */
 930 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 931 {
 932         char *url, *tmp;
 933         struct strbuf buf = STRBUF_INIT;
 934
 935         if (http_is_verbose)
 936                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 937
 938         end_url_with_slash(&buf, base_url);
 939         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 940         url = strbuf_detach(&buf, NULL);
 941
 942         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 943         tmp = strbuf_detach(&buf, NULL);
 944
 945         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 946                 error("Unable to get pack index %s\n", url);
 947                 free(tmp);
 948                 tmp = NULL;
 949         }
 950
 951         free(url);
 952         return tmp;
 953 }
 954
 955 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 956         unsigned char *sha1, const char *base_url)
 957 {
 958         struct packed_git *new_pack;
 959         char *tmp_idx = NULL;
 960         int ret;
 961
 962         if (has_pack_index(sha1)) {
 963                 new_pack = parse_pack_index(sha1, NULL);
 964                 if (!new_pack)
 965                         return -1; /* parse_pack_index() already issued error message */
 966                 goto add_pack;
 967         }
 968
 969         tmp_idx = fetch_pack_index(sha1, base_url);
 970         if (!tmp_idx)
 971                 return -1;
 972
 973         new_pack = parse_pack_index(sha1, tmp_idx);
 974         if (!new_pack) {
 975                 unlink(tmp_idx);
 976                 free(tmp_idx);
 977
 978                 return -1; /* parse_pack_index() already issued error message */
 979         }
 980
 981         ret = verify_pack_index(new_pack);
 982         if (!ret) {
 983                 close_pack_index(new_pack);
 984                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 985         }
 986         free(tmp_idx);
 987         if (ret)
 988                 return -1;
 989
 990 add_pack:
 991         new_pack->next = *packs_head;
 992         *packs_head = new_pack;
 993         return 0;
 994 }
 995
 996 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
 997 {
 998         int ret = 0, i = 0;
 999         char *url, *data;
1000         struct strbuf buf = STRBUF_INIT;
1001         unsigned char sha1[20];
1002
1003         end_url_with_slash(&buf, base_url);
1004         strbuf_addstr(&buf, "objects/info/packs");
1005         url = strbuf_detach(&buf, NULL);
1006
1007         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1008         if (ret != HTTP_OK)
1009                 goto cleanup;
1010
1011         data = buf.buf;
1012         while (i < buf.len) {
1013                 switch (data[i]) {
1014                 case 'P':
1015                         i++;
1016                         if (i + 52 <= buf.len &&
1017                             !prefixcmp(data + i, " pack-") &&
1018                             !prefixcmp(data + i + 46, ".pack\n")) {
1019                                 get_sha1_hex(data + i + 6, sha1);
1020                                 fetch_and_setup_pack_index(packs_head, sha1,
1021                                                       base_url);
1022                                 i += 51;
1023                                 break;
1024                         }
1025                 default:
1026                         while (i < buf.len && data[i] != '\n')
1027                                 i++;
1028                 }
1029                 i++;
1030         }
1031
1032 cleanup:
1033         free(url);
1034         return ret;
1035 }
1036
1037 void release_http_pack_request(struct http_pack_request *preq)
1038 {
1039         if (preq->packfile != NULL) {
1040                 fclose(preq->packfile);
1041                 preq->packfile = NULL;
1042                 preq->slot->local = NULL;
1043         }
1044         if (preq->range_header != NULL) {
1045                 curl_slist_free_all(preq->range_header);
1046                 preq->range_header = NULL;
1047         }
1048         preq->slot = NULL;
1049         free(preq->url);
1050 }
1051
1052 int finish_http_pack_request(struct http_pack_request *preq)
1053 {
1054         struct packed_git **lst;
1055         struct packed_git *p = preq->target;
1056         char *tmp_idx;
1057         struct child_process ip;
1058         const char *ip_argv[8];
1059
1060         close_pack_index(p);
1061
1062         fclose(preq->packfile);
1063         preq->packfile = NULL;
1064         preq->slot->local = NULL;
1065
1066         lst = preq->lst;
1067         while (*lst != p)
1068                 lst = &((*lst)->next);
1069         *lst = (*lst)->next;
1070
1071         tmp_idx = xstrdup(preq->tmpfile);
1072         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1073                ".idx.temp");
1074
1075         ip_argv[0] = "index-pack";
1076         ip_argv[1] = "-o";
1077         ip_argv[2] = tmp_idx;
1078         ip_argv[3] = preq->tmpfile;
1079         ip_argv[4] = NULL;
1080
1081         memset(&ip, 0, sizeof(ip));
1082         ip.argv = ip_argv;
1083         ip.git_cmd = 1;
1084         ip.no_stdin = 1;
1085         ip.no_stdout = 1;
1086
1087         if (run_command(&ip)) {
1088                 unlink(preq->tmpfile);
1089                 unlink(tmp_idx);
1090                 free(tmp_idx);
1091                 return -1;
1092         }
1093
1094         unlink(sha1_pack_index_name(p->sha1));
1095
1096         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1097          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1098                 free(tmp_idx);
1099                 return -1;
1100         }
1101
1102         install_packed_git(p);
1103         free(tmp_idx);
1104         return 0;
1105 }
1106
1107 struct http_pack_request *new_http_pack_request(
1108         struct packed_git *target, const char *base_url)
1109 {
1110         long prev_posn = 0;
1111         char range[RANGE_HEADER_SIZE];
1112         struct strbuf buf = STRBUF_INIT;
1113         struct http_pack_request *preq;
1114
1115         preq = xmalloc(sizeof(*preq));
1116         preq->target = target;
1117         preq->range_header = NULL;
1118
1119         end_url_with_slash(&buf, base_url);
1120         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1121                 sha1_to_hex(target->sha1));
1122         preq->url = strbuf_detach(&buf, NULL);
1123
1124         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1125                 sha1_pack_name(target->sha1));
1126         preq->packfile = fopen(preq->tmpfile, "a");
1127         if (!preq->packfile) {
1128                 error("Unable to open local file %s for pack",
1129                       preq->tmpfile);
1130                 goto abort;
1131         }
1132
1133         preq->slot = get_active_slot();
1134         preq->slot->local = preq->packfile;
1135         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1136         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1137         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1138         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1139                 no_pragma_header);
1140
1141         /*
1142          * If there is data present from a previous transfer attempt,
1143          * resume where it left off
1144          */
1145         prev_posn = ftell(preq->packfile);
1146         if (prev_posn>0) {
1147                 if (http_is_verbose)
1148                         fprintf(stderr,
1149                                 "Resuming fetch of pack %s at byte %ld\n",
1150                                 sha1_to_hex(target->sha1), prev_posn);
1151                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1152                 preq->range_header = curl_slist_append(NULL, range);
1153                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1154                         preq->range_header);
1155         }
1156
1157         return preq;
1158
1159 abort:
1160         free(preq->url);
1161         free(preq);
1162         return NULL;
1163 }
1164
1165 /* Helpers for fetching objects (loose) */
1166 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
1167                                void *data)
1168 {
1169         unsigned char expn[4096];
1170         size_t size = eltsize * nmemb;
1171         int posn = 0;
1172         struct http_object_request *freq =
1173                 (struct http_object_request *)data;
1174         do {
1175                 ssize_t retval = xwrite(freq->localfile,
1176                                         (char *) ptr + posn, size - posn);
1177                 if (retval < 0)
1178                         return posn;
1179                 posn += retval;
1180         } while (posn < size);
1181
1182         freq->stream.avail_in = size;
1183         freq->stream.next_in = ptr;
1184         do {
1185                 freq->stream.next_out = expn;
1186                 freq->stream.avail_out = sizeof(expn);
1187                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1188                 git_SHA1_Update(&freq->c, expn,
1189                                 sizeof(expn) - freq->stream.avail_out);
1190         } while (freq->stream.avail_in && freq->zret == Z_OK);
1191         data_received++;
1192         return size;
1193 }
1194
1195 struct http_object_request *new_http_object_request(const char *base_url,
1196         unsigned char *sha1)
1197 {
1198         char *hex = sha1_to_hex(sha1);
1199         char *filename;
1200         char prevfile[PATH_MAX];
1201         int prevlocal;
1202         unsigned char prev_buf[PREV_BUF_SIZE];
1203         ssize_t prev_read = 0;
1204         long prev_posn = 0;
1205         char range[RANGE_HEADER_SIZE];
1206         struct curl_slist *range_header = NULL;
1207         struct http_object_request *freq;
1208
1209         freq = xmalloc(sizeof(*freq));
1210         hashcpy(freq->sha1, sha1);
1211         freq->localfile = -1;
1212
1213         filename = sha1_file_name(sha1);
1214         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1215                  "%s.temp", filename);
1216
1217         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1218         unlink_or_warn(prevfile);
1219         rename(freq->tmpfile, prevfile);
1220         unlink_or_warn(freq->tmpfile);
1221
1222         if (freq->localfile != -1)
1223                 error("fd leakage in start: %d", freq->localfile);
1224         freq->localfile = open(freq->tmpfile,
1225                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1226         /*
1227          * This could have failed due to the "lazy directory creation";
1228          * try to mkdir the last path component.
1229          */
1230         if (freq->localfile < 0 && errno == ENOENT) {
1231                 char *dir = strrchr(freq->tmpfile, '/');
1232                 if (dir) {
1233                         *dir = 0;
1234                         mkdir(freq->tmpfile, 0777);
1235                         *dir = '/';
1236                 }
1237                 freq->localfile = open(freq->tmpfile,
1238                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1239         }
1240
1241         if (freq->localfile < 0) {
1242                 error("Couldn't create temporary file %s: %s",
1243                       freq->tmpfile, strerror(errno));
1244                 goto abort;
1245         }
1246
1247         memset(&freq->stream, 0, sizeof(freq->stream));
1248
1249         git_inflate_init(&freq->stream);
1250
1251         git_SHA1_Init(&freq->c);
1252
1253         freq->url = get_remote_object_url(base_url, hex, 0);
1254
1255         /*
1256          * If a previous temp file is present, process what was already
1257          * fetched.
1258          */
1259         prevlocal = open(prevfile, O_RDONLY);
1260         if (prevlocal != -1) {
1261                 do {
1262                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1263                         if (prev_read>0) {
1264                                 if (fwrite_sha1_file(prev_buf,
1265                                                      1,
1266                                                      prev_read,
1267                                                      freq) == prev_read) {
1268                                         prev_posn += prev_read;
1269                                 } else {
1270                                         prev_read = -1;
1271                                 }
1272                         }
1273                 } while (prev_read > 0);
1274                 close(prevlocal);
1275         }
1276         unlink_or_warn(prevfile);
1277
1278         /*
1279          * Reset inflate/SHA1 if there was an error reading the previous temp
1280          * file; also rewind to the beginning of the local file.
1281          */
1282         if (prev_read == -1) {
1283                 memset(&freq->stream, 0, sizeof(freq->stream));
1284                 git_inflate_init(&freq->stream);
1285                 git_SHA1_Init(&freq->c);
1286                 if (prev_posn>0) {
1287                         prev_posn = 0;
1288                         lseek(freq->localfile, 0, SEEK_SET);
1289                         if (ftruncate(freq->localfile, 0) < 0) {
1290                                 error("Couldn't truncate temporary file %s: %s",
1291                                           freq->tmpfile, strerror(errno));
1292                                 goto abort;
1293                         }
1294                 }
1295         }
1296
1297         freq->slot = get_active_slot();
1298
1299         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1300         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1301         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1302         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1303         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1304
1305         /*
1306          * If we have successfully processed data from a previous fetch
1307          * attempt, only fetch the data we don't already have.
1308          */
1309         if (prev_posn>0) {
1310                 if (http_is_verbose)
1311                         fprintf(stderr,
1312                                 "Resuming fetch of object %s at byte %ld\n",
1313                                 hex, prev_posn);
1314                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1315                 range_header = curl_slist_append(range_header, range);
1316                 curl_easy_setopt(freq->slot->curl,
1317                                  CURLOPT_HTTPHEADER, range_header);
1318         }
1319
1320         return freq;
1321
1322 abort:
1323         free(filename);
1324         free(freq->url);
1325         free(freq);
1326         return NULL;
1327 }
1328
1329 void process_http_object_request(struct http_object_request *freq)
1330 {
1331         if (freq->slot == NULL)
1332                 return;
1333         freq->curl_result = freq->slot->curl_result;
1334         freq->http_code = freq->slot->http_code;
1335         freq->slot = NULL;
1336 }
1337
1338 int finish_http_object_request(struct http_object_request *freq)
1339 {
1340         struct stat st;
1341
1342         close(freq->localfile);
1343         freq->localfile = -1;
1344
1345         process_http_object_request(freq);
1346
1347         if (freq->http_code == 416) {
1348                 warning("requested range invalid; we may already have all the data.");
1349         } else if (freq->curl_result != CURLE_OK) {
1350                 if (stat(freq->tmpfile, &st) == 0)
1351                         if (st.st_size == 0)
1352                                 unlink_or_warn(freq->tmpfile);
1353                 return -1;
1354         }
1355
1356         git_inflate_end(&freq->stream);
1357         git_SHA1_Final(freq->real_sha1, &freq->c);
1358         if (freq->zret != Z_STREAM_END) {
1359                 unlink_or_warn(freq->tmpfile);
1360                 return -1;
1361         }
1362         if (hashcmp(freq->sha1, freq->real_sha1)) {
1363                 unlink_or_warn(freq->tmpfile);
1364                 return -1;
1365         }
1366         freq->rename =
1367                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1368
1369         return freq->rename;
1370 }
1371
1372 void abort_http_object_request(struct http_object_request *freq)
1373 {
1374         unlink_or_warn(freq->tmpfile);
1375
1376         release_http_object_request(freq);
1377 }
1378
1379 void release_http_object_request(struct http_object_request *freq)
1380 {
1381         if (freq->localfile != -1) {
1382                 close(freq->localfile);
1383                 freq->localfile = -1;
1384         }
1385         if (freq->url != NULL) {
1386                 free(freq->url);
1387                 freq->url = NULL;
1388         }
1389         if (freq->slot != NULL) {
1390                 freq->slot->callback_func = NULL;
1391                 freq->slot->callback_data = NULL;
1392                 release_active_slot(freq->slot);
1393                 freq->slot = NULL;
1394         }
1395 }