http.c

   1 #include "http.h"
   2 #include "pack.h"
   3 #include "sideband.h"
   4 #include "run-command.h"
   5 #include "url.h"
   6 #include "credential.h"
   7 #include "version.h"
   8
   9 int active_requests;
  10 int http_is_verbose;
  11 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  12
  13 #if LIBCURL_VERSION_NUM >= 0x070a06
  14 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  15 #endif
  16
  17 static int min_curl_sessions = 1;
  18 static int curl_session_count;
  19 #ifdef USE_CURL_MULTI
  20 static int max_requests = -1;
  21 static CURLM *curlm;
  22 #endif
  23 #ifndef NO_CURL_EASY_DUPHANDLE
  24 static CURL *curl_default;
  25 #endif
  26
  27 #define PREV_BUF_SIZE 4096
  28 #define RANGE_HEADER_SIZE 30
  29
  30 char curl_errorstr[CURL_ERROR_SIZE];
  31
  32 static int curl_ssl_verify = -1;
  33 static const char *ssl_cert;
  34 #if LIBCURL_VERSION_NUM >= 0x070903
  35 static const char *ssl_key;
  36 #endif
  37 #if LIBCURL_VERSION_NUM >= 0x070908
  38 static const char *ssl_capath;
  39 #endif
  40 static const char *ssl_cainfo;
  41 static long curl_low_speed_limit = -1;
  42 static long curl_low_speed_time = -1;
  43 static int curl_ftp_no_epsv;
  44 static const char *curl_http_proxy;
  45 static const char *curl_cookie_file;
  46 static struct credential http_auth = CREDENTIAL_INIT;
  47 static int http_proactive_auth;
  48 static const char *user_agent;
  49
  50 #if LIBCURL_VERSION_NUM >= 0x071700
  51 /* Use CURLOPT_KEYPASSWD as is */
  52 #elif LIBCURL_VERSION_NUM >= 0x070903
  53 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  54 #else
  55 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  56 #endif
  57
  58 static struct credential cert_auth = CREDENTIAL_INIT;
  59 static int ssl_cert_password_required;
  60
  61 static struct curl_slist *pragma_header;
  62 static struct curl_slist *no_pragma_header;
  63
  64 static struct active_request_slot *active_queue_head;
  65
  66 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  67 {
  68         size_t size = eltsize * nmemb;
  69         struct buffer *buffer = buffer_;
  70
  71         if (size > buffer->buf.len - buffer->posn)
  72                 size = buffer->buf.len - buffer->posn;
  73         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  74         buffer->posn += size;
  75
  76         return size;
  77 }
  78
  79 #ifndef NO_CURL_IOCTL
  80 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  81 {
  82         struct buffer *buffer = clientp;
  83
  84         switch (cmd) {
  85         case CURLIOCMD_NOP:
  86                 return CURLIOE_OK;
  87
  88         case CURLIOCMD_RESTARTREAD:
  89                 buffer->posn = 0;
  90                 return CURLIOE_OK;
  91
  92         default:
  93                 return CURLIOE_UNKNOWNCMD;
  94         }
  95 }
  96 #endif
  97
  98 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  99 {
 100         size_t size = eltsize * nmemb;
 101         struct strbuf *buffer = buffer_;
 102
 103         strbuf_add(buffer, ptr, size);
 104         return size;
 105 }
 106
 107 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 108 {
 109         return eltsize * nmemb;
 110 }
 111
 112 #ifdef USE_CURL_MULTI
 113 static void process_curl_messages(void)
 114 {
 115         int num_messages;
 116         struct active_request_slot *slot;
 117         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 118
 119         while (curl_message != NULL) {
 120                 if (curl_message->msg == CURLMSG_DONE) {
 121                         int curl_result = curl_message->data.result;
 122                         slot = active_queue_head;
 123                         while (slot != NULL &&
 124                                slot->curl != curl_message->easy_handle)
 125                                 slot = slot->next;
 126                         if (slot != NULL) {
 127                                 curl_multi_remove_handle(curlm, slot->curl);
 128                                 slot->curl_result = curl_result;
 129                                 finish_active_slot(slot);
 130                         } else {
 131                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 132                         }
 133                 } else {
 134                         fprintf(stderr, "Unknown CURL message received: %d\n",
 135                                 (int)curl_message->msg);
 136                 }
 137                 curl_message = curl_multi_info_read(curlm, &num_messages);
 138         }
 139 }
 140 #endif
 141
 142 static int http_options(const char *var, const char *value, void *cb)
 143 {
 144         if (!strcmp("http.sslverify", var)) {
 145                 curl_ssl_verify = git_config_bool(var, value);
 146                 return 0;
 147         }
 148         if (!strcmp("http.sslcert", var))
 149                 return git_config_string(&ssl_cert, var, value);
 150 #if LIBCURL_VERSION_NUM >= 0x070903
 151         if (!strcmp("http.sslkey", var))
 152                 return git_config_string(&ssl_key, var, value);
 153 #endif
 154 #if LIBCURL_VERSION_NUM >= 0x070908
 155         if (!strcmp("http.sslcapath", var))
 156                 return git_config_string(&ssl_capath, var, value);
 157 #endif
 158         if (!strcmp("http.sslcainfo", var))
 159                 return git_config_string(&ssl_cainfo, var, value);
 160         if (!strcmp("http.sslcertpasswordprotected", var)) {
 161                 if (git_config_bool(var, value))
 162                         ssl_cert_password_required = 1;
 163                 return 0;
 164         }
 165         if (!strcmp("http.minsessions", var)) {
 166                 min_curl_sessions = git_config_int(var, value);
 167 #ifndef USE_CURL_MULTI
 168                 if (min_curl_sessions > 1)
 169                         min_curl_sessions = 1;
 170 #endif
 171                 return 0;
 172         }
 173 #ifdef USE_CURL_MULTI
 174         if (!strcmp("http.maxrequests", var)) {
 175                 max_requests = git_config_int(var, value);
 176                 return 0;
 177         }
 178 #endif
 179         if (!strcmp("http.lowspeedlimit", var)) {
 180                 curl_low_speed_limit = (long)git_config_int(var, value);
 181                 return 0;
 182         }
 183         if (!strcmp("http.lowspeedtime", var)) {
 184                 curl_low_speed_time = (long)git_config_int(var, value);
 185                 return 0;
 186         }
 187
 188         if (!strcmp("http.noepsv", var)) {
 189                 curl_ftp_no_epsv = git_config_bool(var, value);
 190                 return 0;
 191         }
 192         if (!strcmp("http.proxy", var))
 193                 return git_config_string(&curl_http_proxy, var, value);
 194
 195         if (!strcmp("http.cookiefile", var))
 196                 return git_config_string(&curl_cookie_file, var, value);
 197
 198         if (!strcmp("http.postbuffer", var)) {
 199                 http_post_buffer = git_config_int(var, value);
 200                 if (http_post_buffer < LARGE_PACKET_MAX)
 201                         http_post_buffer = LARGE_PACKET_MAX;
 202                 return 0;
 203         }
 204
 205         if (!strcmp("http.useragent", var))
 206                 return git_config_string(&user_agent, var, value);
 207
 208         /* Fall back on the default ones */
 209         return git_default_config(var, value, cb);
 210 }
 211
 212 static void init_curl_http_auth(CURL *result)
 213 {
 214         if (!http_auth.username)
 215                 return;
 216
 217         credential_fill(&http_auth);
 218
 219 #if LIBCURL_VERSION_NUM >= 0x071301
 220         curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
 221         curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
 222 #else
 223         {
 224                 static struct strbuf up = STRBUF_INIT;
 225                 strbuf_reset(&up);
 226                 strbuf_addf(&up, "%s:%s",
 227                             http_auth.username, http_auth.password);
 228                 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
 229         }
 230 #endif
 231 }
 232
 233 static int has_cert_password(void)
 234 {
 235         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 236                 return 0;
 237         if (!cert_auth.password) {
 238                 cert_auth.protocol = xstrdup("cert");
 239                 cert_auth.path = xstrdup(ssl_cert);
 240                 credential_fill(&cert_auth);
 241         }
 242         return 1;
 243 }
 244
 245 static CURL *get_curl_handle(void)
 246 {
 247         CURL *result = curl_easy_init();
 248
 249         if (!curl_ssl_verify) {
 250                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 251                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 252         } else {
 253                 /* Verify authenticity of the peer's certificate */
 254                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 255                 /* The name in the cert must match whom we tried to connect */
 256                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 257         }
 258
 259 #if LIBCURL_VERSION_NUM >= 0x070907
 260         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 261 #endif
 262 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 263         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 264 #endif
 265
 266         if (http_proactive_auth)
 267                 init_curl_http_auth(result);
 268
 269         if (ssl_cert != NULL)
 270                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 271         if (has_cert_password())
 272                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 273 #if LIBCURL_VERSION_NUM >= 0x070903
 274         if (ssl_key != NULL)
 275                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 276 #endif
 277 #if LIBCURL_VERSION_NUM >= 0x070908
 278         if (ssl_capath != NULL)
 279                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 280 #endif
 281         if (ssl_cainfo != NULL)
 282                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 283         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 284
 285         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 286                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 287                                  curl_low_speed_limit);
 288                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 289                                  curl_low_speed_time);
 290         }
 291
 292         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 293 #if LIBCURL_VERSION_NUM >= 0x071301
 294         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 295 #elif LIBCURL_VERSION_NUM >= 0x071101
 296         curl_easy_setopt(result, CURLOPT_POST301, 1);
 297 #endif
 298
 299         if (getenv("GIT_CURL_VERBOSE"))
 300                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 301
 302         curl_easy_setopt(result, CURLOPT_USERAGENT,
 303                 user_agent ? user_agent : git_user_agent());
 304
 305         if (curl_ftp_no_epsv)
 306                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 307
 308         if (curl_http_proxy) {
 309                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 310                 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 311         }
 312
 313         return result;
 314 }
 315
 316 static void set_from_env(const char **var, const char *envname)
 317 {
 318         const char *val = getenv(envname);
 319         if (val)
 320                 *var = val;
 321 }
 322
 323 void http_init(struct remote *remote, const char *url, int proactive_auth)
 324 {
 325         char *low_speed_limit;
 326         char *low_speed_time;
 327
 328         http_is_verbose = 0;
 329
 330         git_config(http_options, NULL);
 331
 332         curl_global_init(CURL_GLOBAL_ALL);
 333
 334         http_proactive_auth = proactive_auth;
 335
 336         if (remote && remote->http_proxy)
 337                 curl_http_proxy = xstrdup(remote->http_proxy);
 338
 339         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 340         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 341
 342 #ifdef USE_CURL_MULTI
 343         {
 344                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 345                 if (http_max_requests != NULL)
 346                         max_requests = atoi(http_max_requests);
 347         }
 348
 349         curlm = curl_multi_init();
 350         if (curlm == NULL) {
 351                 fprintf(stderr, "Error creating curl multi handle.\n");
 352                 exit(1);
 353         }
 354 #endif
 355
 356         if (getenv("GIT_SSL_NO_VERIFY"))
 357                 curl_ssl_verify = 0;
 358
 359         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 360 #if LIBCURL_VERSION_NUM >= 0x070903
 361         set_from_env(&ssl_key, "GIT_SSL_KEY");
 362 #endif
 363 #if LIBCURL_VERSION_NUM >= 0x070908
 364         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 365 #endif
 366         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 367
 368         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 369
 370         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 371         if (low_speed_limit != NULL)
 372                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 373         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 374         if (low_speed_time != NULL)
 375                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 376
 377         if (curl_ssl_verify == -1)
 378                 curl_ssl_verify = 1;
 379
 380         curl_session_count = 0;
 381 #ifdef USE_CURL_MULTI
 382         if (max_requests < 1)
 383                 max_requests = DEFAULT_MAX_REQUESTS;
 384 #endif
 385
 386         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 387                 curl_ftp_no_epsv = 1;
 388
 389         if (url) {
 390                 credential_from_url(&http_auth, url);
 391                 if (!ssl_cert_password_required &&
 392                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 393                     !prefixcmp(url, "https://"))
 394                         ssl_cert_password_required = 1;
 395         }
 396
 397 #ifndef NO_CURL_EASY_DUPHANDLE
 398         curl_default = get_curl_handle();
 399 #endif
 400 }
 401
 402 void http_cleanup(void)
 403 {
 404         struct active_request_slot *slot = active_queue_head;
 405
 406         while (slot != NULL) {
 407                 struct active_request_slot *next = slot->next;
 408                 if (slot->curl != NULL) {
 409 #ifdef USE_CURL_MULTI
 410                         curl_multi_remove_handle(curlm, slot->curl);
 411 #endif
 412                         curl_easy_cleanup(slot->curl);
 413                 }
 414                 free(slot);
 415                 slot = next;
 416         }
 417         active_queue_head = NULL;
 418
 419 #ifndef NO_CURL_EASY_DUPHANDLE
 420         curl_easy_cleanup(curl_default);
 421 #endif
 422
 423 #ifdef USE_CURL_MULTI
 424         curl_multi_cleanup(curlm);
 425 #endif
 426         curl_global_cleanup();
 427
 428         curl_slist_free_all(pragma_header);
 429         pragma_header = NULL;
 430
 431         curl_slist_free_all(no_pragma_header);
 432         no_pragma_header = NULL;
 433
 434         if (curl_http_proxy) {
 435                 free((void *)curl_http_proxy);
 436                 curl_http_proxy = NULL;
 437         }
 438
 439         if (cert_auth.password != NULL) {
 440                 memset(cert_auth.password, 0, strlen(cert_auth.password));
 441                 free(cert_auth.password);
 442                 cert_auth.password = NULL;
 443         }
 444         ssl_cert_password_required = 0;
 445 }
 446
 447 struct active_request_slot *get_active_slot(void)
 448 {
 449         struct active_request_slot *slot = active_queue_head;
 450         struct active_request_slot *newslot;
 451
 452 #ifdef USE_CURL_MULTI
 453         int num_transfers;
 454
 455         /* Wait for a slot to open up if the queue is full */
 456         while (active_requests >= max_requests) {
 457                 curl_multi_perform(curlm, &num_transfers);
 458                 if (num_transfers < active_requests)
 459                         process_curl_messages();
 460         }
 461 #endif
 462
 463         while (slot != NULL && slot->in_use)
 464                 slot = slot->next;
 465
 466         if (slot == NULL) {
 467                 newslot = xmalloc(sizeof(*newslot));
 468                 newslot->curl = NULL;
 469                 newslot->in_use = 0;
 470                 newslot->next = NULL;
 471
 472                 slot = active_queue_head;
 473                 if (slot == NULL) {
 474                         active_queue_head = newslot;
 475                 } else {
 476                         while (slot->next != NULL)
 477                                 slot = slot->next;
 478                         slot->next = newslot;
 479                 }
 480                 slot = newslot;
 481         }
 482
 483         if (slot->curl == NULL) {
 484 #ifdef NO_CURL_EASY_DUPHANDLE
 485                 slot->curl = get_curl_handle();
 486 #else
 487                 slot->curl = curl_easy_duphandle(curl_default);
 488 #endif
 489                 curl_session_count++;
 490         }
 491
 492         active_requests++;
 493         slot->in_use = 1;
 494         slot->results = NULL;
 495         slot->finished = NULL;
 496         slot->callback_data = NULL;
 497         slot->callback_func = NULL;
 498         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 499         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 500         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 501         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 502         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 503         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 504         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 505         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 506         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 507         if (http_auth.password)
 508                 init_curl_http_auth(slot->curl);
 509
 510         return slot;
 511 }
 512
 513 int start_active_slot(struct active_request_slot *slot)
 514 {
 515 #ifdef USE_CURL_MULTI
 516         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 517         int num_transfers;
 518
 519         if (curlm_result != CURLM_OK &&
 520             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 521                 active_requests--;
 522                 slot->in_use = 0;
 523                 return 0;
 524         }
 525
 526         /*
 527          * We know there must be something to do, since we just added
 528          * something.
 529          */
 530         curl_multi_perform(curlm, &num_transfers);
 531 #endif
 532         return 1;
 533 }
 534
 535 #ifdef USE_CURL_MULTI
 536 struct fill_chain {
 537         void *data;
 538         int (*fill)(void *);
 539         struct fill_chain *next;
 540 };
 541
 542 static struct fill_chain *fill_cfg;
 543
 544 void add_fill_function(void *data, int (*fill)(void *))
 545 {
 546         struct fill_chain *new = xmalloc(sizeof(*new));
 547         struct fill_chain **linkp = &fill_cfg;
 548         new->data = data;
 549         new->fill = fill;
 550         new->next = NULL;
 551         while (*linkp)
 552                 linkp = &(*linkp)->next;
 553         *linkp = new;
 554 }
 555
 556 void fill_active_slots(void)
 557 {
 558         struct active_request_slot *slot = active_queue_head;
 559
 560         while (active_requests < max_requests) {
 561                 struct fill_chain *fill;
 562                 for (fill = fill_cfg; fill; fill = fill->next)
 563                         if (fill->fill(fill->data))
 564                                 break;
 565
 566                 if (!fill)
 567                         break;
 568         }
 569
 570         while (slot != NULL) {
 571                 if (!slot->in_use && slot->curl != NULL
 572                         && curl_session_count > min_curl_sessions) {
 573                         curl_easy_cleanup(slot->curl);
 574                         slot->curl = NULL;
 575                         curl_session_count--;
 576                 }
 577                 slot = slot->next;
 578         }
 579 }
 580
 581 void step_active_slots(void)
 582 {
 583         int num_transfers;
 584         CURLMcode curlm_result;
 585
 586         do {
 587                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 588         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 589         if (num_transfers < active_requests) {
 590                 process_curl_messages();
 591                 fill_active_slots();
 592         }
 593 }
 594 #endif
 595
 596 void run_active_slot(struct active_request_slot *slot)
 597 {
 598 #ifdef USE_CURL_MULTI
 599         fd_set readfds;
 600         fd_set writefds;
 601         fd_set excfds;
 602         int max_fd;
 603         struct timeval select_timeout;
 604         int finished = 0;
 605
 606         slot->finished = &finished;
 607         while (!finished) {
 608                 step_active_slots();
 609
 610                 if (slot->in_use) {
 611 #if LIBCURL_VERSION_NUM >= 0x070f04
 612                         long curl_timeout;
 613                         curl_multi_timeout(curlm, &curl_timeout);
 614                         if (curl_timeout == 0) {
 615                                 continue;
 616                         } else if (curl_timeout == -1) {
 617                                 select_timeout.tv_sec  = 0;
 618                                 select_timeout.tv_usec = 50000;
 619                         } else {
 620                                 select_timeout.tv_sec  =  curl_timeout / 1000;
 621                                 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 622                         }
 623 #else
 624                         select_timeout.tv_sec  = 0;
 625                         select_timeout.tv_usec = 50000;
 626 #endif
 627
 628                         max_fd = -1;
 629                         FD_ZERO(&readfds);
 630                         FD_ZERO(&writefds);
 631                         FD_ZERO(&excfds);
 632                         curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 633
 634                         /*
 635                          * It can happen that curl_multi_timeout returns a pathologically
 636                          * long timeout when curl_multi_fdset returns no file descriptors
 637                          * to read.  See commit message for more details.
 638                          */
 639                         if (max_fd < 0 &&
 640                             (select_timeout.tv_sec > 0 ||
 641                              select_timeout.tv_usec > 50000)) {
 642                                 select_timeout.tv_sec  = 0;
 643                                 select_timeout.tv_usec = 50000;
 644                         }
 645
 646                         select(max_fd+1, &readfds, &writefds, &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 char *quote_ref_url(const char *base, const char *ref)
 725 {
 726         struct strbuf buf = STRBUF_INIT;
 727         const char *cp;
 728         int ch;
 729
 730         end_url_with_slash(&buf, base);
 731
 732         for (cp = ref; (ch = *cp) != 0; cp++)
 733                 if (needs_quote(ch))
 734                         strbuf_addf(&buf, "%%%02x", ch);
 735                 else
 736                         strbuf_addch(&buf, *cp);
 737
 738         return strbuf_detach(&buf, NULL);
 739 }
 740
 741 void append_remote_object_url(struct strbuf *buf, const char *url,
 742                               const char *hex,
 743                               int only_two_digit_prefix)
 744 {
 745         end_url_with_slash(buf, url);
 746
 747         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 748         if (!only_two_digit_prefix)
 749                 strbuf_addf(buf, "%s", hex+2);
 750 }
 751
 752 char *get_remote_object_url(const char *url, const char *hex,
 753                             int only_two_digit_prefix)
 754 {
 755         struct strbuf buf = STRBUF_INIT;
 756         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 757         return strbuf_detach(&buf, NULL);
 758 }
 759
 760 int handle_curl_result(struct slot_results *results)
 761 {
 762         if (results->curl_result == CURLE_OK) {
 763                 credential_approve(&http_auth);
 764                 return HTTP_OK;
 765         } else if (missing_target(results))
 766                 return HTTP_MISSING_TARGET;
 767         else if (results->http_code == 401) {
 768                 if (http_auth.username && http_auth.password) {
 769                         credential_reject(&http_auth);
 770                         return HTTP_NOAUTH;
 771                 } else {
 772                         credential_fill(&http_auth);
 773                         return HTTP_REAUTH;
 774                 }
 775         } else {
 776 #if LIBCURL_VERSION_NUM >= 0x070c00
 777                 if (!curl_errorstr[0])
 778                         strlcpy(curl_errorstr,
 779                                 curl_easy_strerror(results->curl_result),
 780                                 sizeof(curl_errorstr));
 781 #endif
 782                 return HTTP_ERROR;
 783         }
 784 }
 785
 786 /* http_request() targets */
 787 #define HTTP_REQUEST_STRBUF     0
 788 #define HTTP_REQUEST_FILE       1
 789
 790 static int http_request(const char *url, void *result, int target, int options)
 791 {
 792         struct active_request_slot *slot;
 793         struct slot_results results;
 794         struct curl_slist *headers = NULL;
 795         struct strbuf buf = STRBUF_INIT;
 796         int ret;
 797
 798         slot = get_active_slot();
 799         slot->results = &results;
 800         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 801
 802         if (result == NULL) {
 803                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 804         } else {
 805                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 806                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 807
 808                 if (target == HTTP_REQUEST_FILE) {
 809                         long posn = ftell(result);
 810                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 811                                          fwrite);
 812                         if (posn > 0) {
 813                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 814                                 headers = curl_slist_append(headers, buf.buf);
 815                                 strbuf_reset(&buf);
 816                         }
 817                 } else
 818                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 819                                          fwrite_buffer);
 820         }
 821
 822         strbuf_addstr(&buf, "Pragma:");
 823         if (options & HTTP_NO_CACHE)
 824                 strbuf_addstr(&buf, " no-cache");
 825
 826         headers = curl_slist_append(headers, buf.buf);
 827
 828         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 829         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 830         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 831
 832         if (start_active_slot(slot)) {
 833                 run_active_slot(slot);
 834                 ret = handle_curl_result(&results);
 835         } else {
 836                 error("Unable to start HTTP request for %s", url);
 837                 ret = HTTP_START_FAILED;
 838         }
 839
 840         curl_slist_free_all(headers);
 841         strbuf_release(&buf);
 842
 843         return ret;
 844 }
 845
 846 static int http_request_reauth(const char *url, void *result, int target,
 847                                int options)
 848 {
 849         int ret = http_request(url, result, target, options);
 850         if (ret != HTTP_REAUTH)
 851                 return ret;
 852         return http_request(url, result, target, options);
 853 }
 854
 855 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 856 {
 857         return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 858 }
 859
 860 /*
 861  * Downloads a URL and stores the result in the given file.
 862  *
 863  * If a previous interrupted download is detected (i.e. a previous temporary
 864  * file is still around) the download is resumed.
 865  */
 866 static int http_get_file(const char *url, const char *filename, int options)
 867 {
 868         int ret;
 869         struct strbuf tmpfile = STRBUF_INIT;
 870         FILE *result;
 871
 872         strbuf_addf(&tmpfile, "%s.temp", filename);
 873         result = fopen(tmpfile.buf, "a");
 874         if (! result) {
 875                 error("Unable to open local file %s", tmpfile.buf);
 876                 ret = HTTP_ERROR;
 877                 goto cleanup;
 878         }
 879
 880         ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 881         fclose(result);
 882
 883         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 884                 ret = HTTP_ERROR;
 885 cleanup:
 886         strbuf_release(&tmpfile);
 887         return ret;
 888 }
 889
 890 int http_error(const char *url, int ret)
 891 {
 892         /* http_request has already handled HTTP_START_FAILED. */
 893         if (ret != HTTP_START_FAILED)
 894                 error("%s while accessing %s", curl_errorstr, url);
 895
 896         return ret;
 897 }
 898
 899 int http_fetch_ref(const char *base, struct ref *ref)
 900 {
 901         char *url;
 902         struct strbuf buffer = STRBUF_INIT;
 903         int ret = -1;
 904
 905         url = quote_ref_url(base, ref->name);
 906         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 907                 strbuf_rtrim(&buffer);
 908                 if (buffer.len == 40)
 909                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 910                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 911                         ref->symref = xstrdup(buffer.buf + 5);
 912                         ret = 0;
 913                 }
 914         }
 915
 916         strbuf_release(&buffer);
 917         free(url);
 918         return ret;
 919 }
 920
 921 /* Helpers for fetching packs */
 922 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 923 {
 924         char *url, *tmp;
 925         struct strbuf buf = STRBUF_INIT;
 926
 927         if (http_is_verbose)
 928                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 929
 930         end_url_with_slash(&buf, base_url);
 931         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 932         url = strbuf_detach(&buf, NULL);
 933
 934         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 935         tmp = strbuf_detach(&buf, NULL);
 936
 937         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 938                 error("Unable to get pack index %s", url);
 939                 free(tmp);
 940                 tmp = NULL;
 941         }
 942
 943         free(url);
 944         return tmp;
 945 }
 946
 947 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 948         unsigned char *sha1, const char *base_url)
 949 {
 950         struct packed_git *new_pack;
 951         char *tmp_idx = NULL;
 952         int ret;
 953
 954         if (has_pack_index(sha1)) {
 955                 new_pack = parse_pack_index(sha1, NULL);
 956                 if (!new_pack)
 957                         return -1; /* parse_pack_index() already issued error message */
 958                 goto add_pack;
 959         }
 960
 961         tmp_idx = fetch_pack_index(sha1, base_url);
 962         if (!tmp_idx)
 963                 return -1;
 964
 965         new_pack = parse_pack_index(sha1, tmp_idx);
 966         if (!new_pack) {
 967                 unlink(tmp_idx);
 968                 free(tmp_idx);
 969
 970                 return -1; /* parse_pack_index() already issued error message */
 971         }
 972
 973         ret = verify_pack_index(new_pack);
 974         if (!ret) {
 975                 close_pack_index(new_pack);
 976                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 977         }
 978         free(tmp_idx);
 979         if (ret)
 980                 return -1;
 981
 982 add_pack:
 983         new_pack->next = *packs_head;
 984         *packs_head = new_pack;
 985         return 0;
 986 }
 987
 988 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
 989 {
 990         int ret = 0, i = 0;
 991         char *url, *data;
 992         struct strbuf buf = STRBUF_INIT;
 993         unsigned char sha1[20];
 994
 995         end_url_with_slash(&buf, base_url);
 996         strbuf_addstr(&buf, "objects/info/packs");
 997         url = strbuf_detach(&buf, NULL);
 998
 999         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1000         if (ret != HTTP_OK)
1001                 goto cleanup;
1002
1003         data = buf.buf;
1004         while (i < buf.len) {
1005                 switch (data[i]) {
1006                 case 'P':
1007                         i++;
1008                         if (i + 52 <= buf.len &&
1009                             !prefixcmp(data + i, " pack-") &&
1010                             !prefixcmp(data + i + 46, ".pack\n")) {
1011                                 get_sha1_hex(data + i + 6, sha1);
1012                                 fetch_and_setup_pack_index(packs_head, sha1,
1013                                                       base_url);
1014                                 i += 51;
1015                                 break;
1016                         }
1017                 default:
1018                         while (i < buf.len && data[i] != '\n')
1019                                 i++;
1020                 }
1021                 i++;
1022         }
1023
1024 cleanup:
1025         free(url);
1026         return ret;
1027 }
1028
1029 void release_http_pack_request(struct http_pack_request *preq)
1030 {
1031         if (preq->packfile != NULL) {
1032                 fclose(preq->packfile);
1033                 preq->packfile = NULL;
1034         }
1035         if (preq->range_header != NULL) {
1036                 curl_slist_free_all(preq->range_header);
1037                 preq->range_header = NULL;
1038         }
1039         preq->slot = NULL;
1040         free(preq->url);
1041 }
1042
1043 int finish_http_pack_request(struct http_pack_request *preq)
1044 {
1045         struct packed_git **lst;
1046         struct packed_git *p = preq->target;
1047         char *tmp_idx;
1048         struct child_process ip;
1049         const char *ip_argv[8];
1050
1051         close_pack_index(p);
1052
1053         fclose(preq->packfile);
1054         preq->packfile = NULL;
1055
1056         lst = preq->lst;
1057         while (*lst != p)
1058                 lst = &((*lst)->next);
1059         *lst = (*lst)->next;
1060
1061         tmp_idx = xstrdup(preq->tmpfile);
1062         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1063                ".idx.temp");
1064
1065         ip_argv[0] = "index-pack";
1066         ip_argv[1] = "-o";
1067         ip_argv[2] = tmp_idx;
1068         ip_argv[3] = preq->tmpfile;
1069         ip_argv[4] = NULL;
1070
1071         memset(&ip, 0, sizeof(ip));
1072         ip.argv = ip_argv;
1073         ip.git_cmd = 1;
1074         ip.no_stdin = 1;
1075         ip.no_stdout = 1;
1076
1077         if (run_command(&ip)) {
1078                 unlink(preq->tmpfile);
1079                 unlink(tmp_idx);
1080                 free(tmp_idx);
1081                 return -1;
1082         }
1083
1084         unlink(sha1_pack_index_name(p->sha1));
1085
1086         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1087          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1088                 free(tmp_idx);
1089                 return -1;
1090         }
1091
1092         install_packed_git(p);
1093         free(tmp_idx);
1094         return 0;
1095 }
1096
1097 struct http_pack_request *new_http_pack_request(
1098         struct packed_git *target, const char *base_url)
1099 {
1100         long prev_posn = 0;
1101         char range[RANGE_HEADER_SIZE];
1102         struct strbuf buf = STRBUF_INIT;
1103         struct http_pack_request *preq;
1104
1105         preq = xcalloc(1, sizeof(*preq));
1106         preq->target = target;
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         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1124         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1125         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1126         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1127                 no_pragma_header);
1128
1129         /*
1130          * If there is data present from a previous transfer attempt,
1131          * resume where it left off
1132          */
1133         prev_posn = ftell(preq->packfile);
1134         if (prev_posn>0) {
1135                 if (http_is_verbose)
1136                         fprintf(stderr,
1137                                 "Resuming fetch of pack %s at byte %ld\n",
1138                                 sha1_to_hex(target->sha1), prev_posn);
1139                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1140                 preq->range_header = curl_slist_append(NULL, range);
1141                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1142                         preq->range_header);
1143         }
1144
1145         return preq;
1146
1147 abort:
1148         free(preq->url);
1149         free(preq);
1150         return NULL;
1151 }
1152
1153 /* Helpers for fetching objects (loose) */
1154 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1155                                void *data)
1156 {
1157         unsigned char expn[4096];
1158         size_t size = eltsize * nmemb;
1159         int posn = 0;
1160         struct http_object_request *freq =
1161                 (struct http_object_request *)data;
1162         do {
1163                 ssize_t retval = xwrite(freq->localfile,
1164                                         (char *) ptr + posn, size - posn);
1165                 if (retval < 0)
1166                         return posn;
1167                 posn += retval;
1168         } while (posn < size);
1169
1170         freq->stream.avail_in = size;
1171         freq->stream.next_in = (void *)ptr;
1172         do {
1173                 freq->stream.next_out = expn;
1174                 freq->stream.avail_out = sizeof(expn);
1175                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1176                 git_SHA1_Update(&freq->c, expn,
1177                                 sizeof(expn) - freq->stream.avail_out);
1178         } while (freq->stream.avail_in && freq->zret == Z_OK);
1179         return size;
1180 }
1181
1182 struct http_object_request *new_http_object_request(const char *base_url,
1183         unsigned char *sha1)
1184 {
1185         char *hex = sha1_to_hex(sha1);
1186         char *filename;
1187         char prevfile[PATH_MAX];
1188         int prevlocal;
1189         char prev_buf[PREV_BUF_SIZE];
1190         ssize_t prev_read = 0;
1191         long prev_posn = 0;
1192         char range[RANGE_HEADER_SIZE];
1193         struct curl_slist *range_header = NULL;
1194         struct http_object_request *freq;
1195
1196         freq = xcalloc(1, sizeof(*freq));
1197         hashcpy(freq->sha1, sha1);
1198         freq->localfile = -1;
1199
1200         filename = sha1_file_name(sha1);
1201         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1202                  "%s.temp", filename);
1203
1204         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1205         unlink_or_warn(prevfile);
1206         rename(freq->tmpfile, prevfile);
1207         unlink_or_warn(freq->tmpfile);
1208
1209         if (freq->localfile != -1)
1210                 error("fd leakage in start: %d", freq->localfile);
1211         freq->localfile = open(freq->tmpfile,
1212                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1213         /*
1214          * This could have failed due to the "lazy directory creation";
1215          * try to mkdir the last path component.
1216          */
1217         if (freq->localfile < 0 && errno == ENOENT) {
1218                 char *dir = strrchr(freq->tmpfile, '/');
1219                 if (dir) {
1220                         *dir = 0;
1221                         mkdir(freq->tmpfile, 0777);
1222                         *dir = '/';
1223                 }
1224                 freq->localfile = open(freq->tmpfile,
1225                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1226         }
1227
1228         if (freq->localfile < 0) {
1229                 error("Couldn't create temporary file %s: %s",
1230                       freq->tmpfile, strerror(errno));
1231                 goto abort;
1232         }
1233
1234         git_inflate_init(&freq->stream);
1235
1236         git_SHA1_Init(&freq->c);
1237
1238         freq->url = get_remote_object_url(base_url, hex, 0);
1239
1240         /*
1241          * If a previous temp file is present, process what was already
1242          * fetched.
1243          */
1244         prevlocal = open(prevfile, O_RDONLY);
1245         if (prevlocal != -1) {
1246                 do {
1247                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1248                         if (prev_read>0) {
1249                                 if (fwrite_sha1_file(prev_buf,
1250                                                      1,
1251                                                      prev_read,
1252                                                      freq) == prev_read) {
1253                                         prev_posn += prev_read;
1254                                 } else {
1255                                         prev_read = -1;
1256                                 }
1257                         }
1258                 } while (prev_read > 0);
1259                 close(prevlocal);
1260         }
1261         unlink_or_warn(prevfile);
1262
1263         /*
1264          * Reset inflate/SHA1 if there was an error reading the previous temp
1265          * file; also rewind to the beginning of the local file.
1266          */
1267         if (prev_read == -1) {
1268                 memset(&freq->stream, 0, sizeof(freq->stream));
1269                 git_inflate_init(&freq->stream);
1270                 git_SHA1_Init(&freq->c);
1271                 if (prev_posn>0) {
1272                         prev_posn = 0;
1273                         lseek(freq->localfile, 0, SEEK_SET);
1274                         if (ftruncate(freq->localfile, 0) < 0) {
1275                                 error("Couldn't truncate temporary file %s: %s",
1276                                           freq->tmpfile, strerror(errno));
1277                                 goto abort;
1278                         }
1279                 }
1280         }
1281
1282         freq->slot = get_active_slot();
1283
1284         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1285         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1286         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1287         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1288         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1289
1290         /*
1291          * If we have successfully processed data from a previous fetch
1292          * attempt, only fetch the data we don't already have.
1293          */
1294         if (prev_posn>0) {
1295                 if (http_is_verbose)
1296                         fprintf(stderr,
1297                                 "Resuming fetch of object %s at byte %ld\n",
1298                                 hex, prev_posn);
1299                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1300                 range_header = curl_slist_append(range_header, range);
1301                 curl_easy_setopt(freq->slot->curl,
1302                                  CURLOPT_HTTPHEADER, range_header);
1303         }
1304
1305         return freq;
1306
1307 abort:
1308         free(freq->url);
1309         free(freq);
1310         return NULL;
1311 }
1312
1313 void process_http_object_request(struct http_object_request *freq)
1314 {
1315         if (freq->slot == NULL)
1316                 return;
1317         freq->curl_result = freq->slot->curl_result;
1318         freq->http_code = freq->slot->http_code;
1319         freq->slot = NULL;
1320 }
1321
1322 int finish_http_object_request(struct http_object_request *freq)
1323 {
1324         struct stat st;
1325
1326         close(freq->localfile);
1327         freq->localfile = -1;
1328
1329         process_http_object_request(freq);
1330
1331         if (freq->http_code == 416) {
1332                 warning("requested range invalid; we may already have all the data.");
1333         } else if (freq->curl_result != CURLE_OK) {
1334                 if (stat(freq->tmpfile, &st) == 0)
1335                         if (st.st_size == 0)
1336                                 unlink_or_warn(freq->tmpfile);
1337                 return -1;
1338         }
1339
1340         git_inflate_end(&freq->stream);
1341         git_SHA1_Final(freq->real_sha1, &freq->c);
1342         if (freq->zret != Z_STREAM_END) {
1343                 unlink_or_warn(freq->tmpfile);
1344                 return -1;
1345         }
1346         if (hashcmp(freq->sha1, freq->real_sha1)) {
1347                 unlink_or_warn(freq->tmpfile);
1348                 return -1;
1349         }
1350         freq->rename =
1351                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1352
1353         return freq->rename;
1354 }
1355
1356 void abort_http_object_request(struct http_object_request *freq)
1357 {
1358         unlink_or_warn(freq->tmpfile);
1359
1360         release_http_object_request(freq);
1361 }
1362
1363 void release_http_object_request(struct http_object_request *freq)
1364 {
1365         if (freq->localfile != -1) {
1366                 close(freq->localfile);
1367                 freq->localfile = -1;
1368         }
1369         if (freq->url != NULL) {
1370                 free(freq->url);
1371                 freq->url = NULL;
1372         }
1373         if (freq->slot != NULL) {
1374                 freq->slot->callback_func = NULL;
1375                 freq->slot->callback_data = NULL;
1376                 release_active_slot(freq->slot);
1377                 freq->slot = NULL;
1378         }
1379 }