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

   1 #include "http.h"
   2 #include "pack.h"
   3 #include "sideband.h"
   4 #include "run-command.h"
   5 #include "url.h"
   6 #include "credential.h"
   7 #include "version.h"
   8 #include "pkt-line.h"
   9
  10 int active_requests;
  11 int http_is_verbose;
  12 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  13
  14 #if LIBCURL_VERSION_NUM >= 0x070a06
  15 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  16 #endif
  17
  18 static int min_curl_sessions = 1;
  19 static int curl_session_count;
  20 #ifdef USE_CURL_MULTI
  21 static int max_requests = -1;
  22 static CURLM *curlm;
  23 #endif
  24 #ifndef NO_CURL_EASY_DUPHANDLE
  25 static CURL *curl_default;
  26 #endif
  27
  28 #define PREV_BUF_SIZE 4096
  29 #define RANGE_HEADER_SIZE 30
  30
  31 char curl_errorstr[CURL_ERROR_SIZE];
  32
  33 static int curl_ssl_verify = -1;
  34 static const char *ssl_cert;
  35 #if LIBCURL_VERSION_NUM >= 0x070903
  36 static const char *ssl_key;
  37 #endif
  38 #if LIBCURL_VERSION_NUM >= 0x070908
  39 static const char *ssl_capath;
  40 #endif
  41 static const char *ssl_cainfo;
  42 static long curl_low_speed_limit = -1;
  43 static long curl_low_speed_time = -1;
  44 static int curl_ftp_no_epsv;
  45 static const char *curl_http_proxy;
  46 static const char *curl_cookie_file;
  47 static struct credential http_auth = CREDENTIAL_INIT;
  48 static int http_proactive_auth;
  49 static const char *user_agent;
  50
  51 #if LIBCURL_VERSION_NUM >= 0x071700
  52 /* Use CURLOPT_KEYPASSWD as is */
  53 #elif LIBCURL_VERSION_NUM >= 0x070903
  54 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  55 #else
  56 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  57 #endif
  58
  59 static struct credential cert_auth = CREDENTIAL_INIT;
  60 static int ssl_cert_password_required;
  61
  62 static struct curl_slist *pragma_header;
  63 static struct curl_slist *no_pragma_header;
  64
  65 static struct active_request_slot *active_queue_head;
  66
  67 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  68 {
  69         size_t size = eltsize * nmemb;
  70         struct buffer *buffer = buffer_;
  71
  72         if (size > buffer->buf.len - buffer->posn)
  73                 size = buffer->buf.len - buffer->posn;
  74         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  75         buffer->posn += size;
  76
  77         return size;
  78 }
  79
  80 #ifndef NO_CURL_IOCTL
  81 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  82 {
  83         struct buffer *buffer = clientp;
  84
  85         switch (cmd) {
  86         case CURLIOCMD_NOP:
  87                 return CURLIOE_OK;
  88
  89         case CURLIOCMD_RESTARTREAD:
  90                 buffer->posn = 0;
  91                 return CURLIOE_OK;
  92
  93         default:
  94                 return CURLIOE_UNKNOWNCMD;
  95         }
  96 }
  97 #endif
  98
  99 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
 100 {
 101         size_t size = eltsize * nmemb;
 102         struct strbuf *buffer = buffer_;
 103
 104         strbuf_add(buffer, ptr, size);
 105         return size;
 106 }
 107
 108 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 109 {
 110         return eltsize * nmemb;
 111 }
 112
 113 #ifdef USE_CURL_MULTI
 114 static void process_curl_messages(void)
 115 {
 116         int num_messages;
 117         struct active_request_slot *slot;
 118         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 119
 120         while (curl_message != NULL) {
 121                 if (curl_message->msg == CURLMSG_DONE) {
 122                         int curl_result = curl_message->data.result;
 123                         slot = active_queue_head;
 124                         while (slot != NULL &&
 125                                slot->curl != curl_message->easy_handle)
 126                                 slot = slot->next;
 127                         if (slot != NULL) {
 128                                 curl_multi_remove_handle(curlm, slot->curl);
 129                                 slot->curl_result = curl_result;
 130                                 finish_active_slot(slot);
 131                         } else {
 132                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 133                         }
 134                 } else {
 135                         fprintf(stderr, "Unknown CURL message received: %d\n",
 136                                 (int)curl_message->msg);
 137                 }
 138                 curl_message = curl_multi_info_read(curlm, &num_messages);
 139         }
 140 }
 141 #endif
 142
 143 static int http_options(const char *var, const char *value, void *cb)
 144 {
 145         if (!strcmp("http.sslverify", var)) {
 146                 curl_ssl_verify = git_config_bool(var, value);
 147                 return 0;
 148         }
 149         if (!strcmp("http.sslcert", var))
 150                 return git_config_string(&ssl_cert, var, value);
 151 #if LIBCURL_VERSION_NUM >= 0x070903
 152         if (!strcmp("http.sslkey", var))
 153                 return git_config_string(&ssl_key, var, value);
 154 #endif
 155 #if LIBCURL_VERSION_NUM >= 0x070908
 156         if (!strcmp("http.sslcapath", var))
 157                 return git_config_string(&ssl_capath, var, value);
 158 #endif
 159         if (!strcmp("http.sslcainfo", var))
 160                 return git_config_string(&ssl_cainfo, var, value);
 161         if (!strcmp("http.sslcertpasswordprotected", var)) {
 162                 if (git_config_bool(var, value))
 163                         ssl_cert_password_required = 1;
 164                 return 0;
 165         }
 166         if (!strcmp("http.minsessions", var)) {
 167                 min_curl_sessions = git_config_int(var, value);
 168 #ifndef USE_CURL_MULTI
 169                 if (min_curl_sessions > 1)
 170                         min_curl_sessions = 1;
 171 #endif
 172                 return 0;
 173         }
 174 #ifdef USE_CURL_MULTI
 175         if (!strcmp("http.maxrequests", var)) {
 176                 max_requests = git_config_int(var, value);
 177                 return 0;
 178         }
 179 #endif
 180         if (!strcmp("http.lowspeedlimit", var)) {
 181                 curl_low_speed_limit = (long)git_config_int(var, value);
 182                 return 0;
 183         }
 184         if (!strcmp("http.lowspeedtime", var)) {
 185                 curl_low_speed_time = (long)git_config_int(var, value);
 186                 return 0;
 187         }
 188
 189         if (!strcmp("http.noepsv", var)) {
 190                 curl_ftp_no_epsv = git_config_bool(var, value);
 191                 return 0;
 192         }
 193         if (!strcmp("http.proxy", var))
 194                 return git_config_string(&curl_http_proxy, var, value);
 195
 196         if (!strcmp("http.cookiefile", var))
 197                 return git_config_string(&curl_cookie_file, var, value);
 198
 199         if (!strcmp("http.postbuffer", var)) {
 200                 http_post_buffer = git_config_int(var, value);
 201                 if (http_post_buffer < LARGE_PACKET_MAX)
 202                         http_post_buffer = LARGE_PACKET_MAX;
 203                 return 0;
 204         }
 205
 206         if (!strcmp("http.useragent", var))
 207                 return git_config_string(&user_agent, var, value);
 208
 209         /* Fall back on the default ones */
 210         return git_default_config(var, value, cb);
 211 }
 212
 213 static void init_curl_http_auth(CURL *result)
 214 {
 215         if (!http_auth.username)
 216                 return;
 217
 218         credential_fill(&http_auth);
 219
 220 #if LIBCURL_VERSION_NUM >= 0x071301
 221         curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
 222         curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
 223 #else
 224         {
 225                 static struct strbuf up = STRBUF_INIT;
 226                 strbuf_reset(&up);
 227                 strbuf_addf(&up, "%s:%s",
 228                             http_auth.username, http_auth.password);
 229                 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
 230         }
 231 #endif
 232 }
 233
 234 static int has_cert_password(void)
 235 {
 236         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 237                 return 0;
 238         if (!cert_auth.password) {
 239                 cert_auth.protocol = xstrdup("cert");
 240                 cert_auth.username = xstrdup("");
 241                 cert_auth.path = xstrdup(ssl_cert);
 242                 credential_fill(&cert_auth);
 243         }
 244         return 1;
 245 }
 246
 247 static CURL *get_curl_handle(void)
 248 {
 249         CURL *result = curl_easy_init();
 250
 251         if (!curl_ssl_verify) {
 252                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 253                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 254         } else {
 255                 /* Verify authenticity of the peer's certificate */
 256                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 257                 /* The name in the cert must match whom we tried to connect */
 258                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 259         }
 260
 261 #if LIBCURL_VERSION_NUM >= 0x070907
 262         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 263 #endif
 264 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 265         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 266 #endif
 267
 268         if (http_proactive_auth)
 269                 init_curl_http_auth(result);
 270
 271         if (ssl_cert != NULL)
 272                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 273         if (has_cert_password())
 274                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 275 #if LIBCURL_VERSION_NUM >= 0x070903
 276         if (ssl_key != NULL)
 277                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 278 #endif
 279 #if LIBCURL_VERSION_NUM >= 0x070908
 280         if (ssl_capath != NULL)
 281                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 282 #endif
 283         if (ssl_cainfo != NULL)
 284                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 285         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 286
 287         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 288                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 289                                  curl_low_speed_limit);
 290                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 291                                  curl_low_speed_time);
 292         }
 293
 294         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 295 #if LIBCURL_VERSION_NUM >= 0x071301
 296         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 297 #elif LIBCURL_VERSION_NUM >= 0x071101
 298         curl_easy_setopt(result, CURLOPT_POST301, 1);
 299 #endif
 300
 301         if (getenv("GIT_CURL_VERBOSE"))
 302                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 303
 304         curl_easy_setopt(result, CURLOPT_USERAGENT,
 305                 user_agent ? user_agent : git_user_agent());
 306
 307         if (curl_ftp_no_epsv)
 308                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 309
 310         if (curl_http_proxy) {
 311                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 312                 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 313         }
 314
 315         return result;
 316 }
 317
 318 static void set_from_env(const char **var, const char *envname)
 319 {
 320         const char *val = getenv(envname);
 321         if (val)
 322                 *var = val;
 323 }
 324
 325 void http_init(struct remote *remote, const char *url, int proactive_auth)
 326 {
 327         char *low_speed_limit;
 328         char *low_speed_time;
 329
 330         http_is_verbose = 0;
 331
 332         git_config(http_options, NULL);
 333
 334         curl_global_init(CURL_GLOBAL_ALL);
 335
 336         http_proactive_auth = proactive_auth;
 337
 338         if (remote && remote->http_proxy)
 339                 curl_http_proxy = xstrdup(remote->http_proxy);
 340
 341         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 342         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 343
 344 #ifdef USE_CURL_MULTI
 345         {
 346                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 347                 if (http_max_requests != NULL)
 348                         max_requests = atoi(http_max_requests);
 349         }
 350
 351         curlm = curl_multi_init();
 352         if (curlm == NULL) {
 353                 fprintf(stderr, "Error creating curl multi handle.\n");
 354                 exit(1);
 355         }
 356 #endif
 357
 358         if (getenv("GIT_SSL_NO_VERIFY"))
 359                 curl_ssl_verify = 0;
 360
 361         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 362 #if LIBCURL_VERSION_NUM >= 0x070903
 363         set_from_env(&ssl_key, "GIT_SSL_KEY");
 364 #endif
 365 #if LIBCURL_VERSION_NUM >= 0x070908
 366         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 367 #endif
 368         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 369
 370         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 371
 372         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 373         if (low_speed_limit != NULL)
 374                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 375         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 376         if (low_speed_time != NULL)
 377                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 378
 379         if (curl_ssl_verify == -1)
 380                 curl_ssl_verify = 1;
 381
 382         curl_session_count = 0;
 383 #ifdef USE_CURL_MULTI
 384         if (max_requests < 1)
 385                 max_requests = DEFAULT_MAX_REQUESTS;
 386 #endif
 387
 388         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 389                 curl_ftp_no_epsv = 1;
 390
 391         if (url) {
 392                 credential_from_url(&http_auth, url);
 393                 if (!ssl_cert_password_required &&
 394                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 395                     !prefixcmp(url, "https://"))
 396                         ssl_cert_password_required = 1;
 397         }
 398
 399 #ifndef NO_CURL_EASY_DUPHANDLE
 400         curl_default = get_curl_handle();
 401 #endif
 402 }
 403
 404 void http_cleanup(void)
 405 {
 406         struct active_request_slot *slot = active_queue_head;
 407
 408         while (slot != NULL) {
 409                 struct active_request_slot *next = slot->next;
 410                 if (slot->curl != NULL) {
 411 #ifdef USE_CURL_MULTI
 412                         curl_multi_remove_handle(curlm, slot->curl);
 413 #endif
 414                         curl_easy_cleanup(slot->curl);
 415                 }
 416                 free(slot);
 417                 slot = next;
 418         }
 419         active_queue_head = NULL;
 420
 421 #ifndef NO_CURL_EASY_DUPHANDLE
 422         curl_easy_cleanup(curl_default);
 423 #endif
 424
 425 #ifdef USE_CURL_MULTI
 426         curl_multi_cleanup(curlm);
 427 #endif
 428         curl_global_cleanup();
 429
 430         curl_slist_free_all(pragma_header);
 431         pragma_header = NULL;
 432
 433         curl_slist_free_all(no_pragma_header);
 434         no_pragma_header = NULL;
 435
 436         if (curl_http_proxy) {
 437                 free((void *)curl_http_proxy);
 438                 curl_http_proxy = NULL;
 439         }
 440
 441         if (cert_auth.password != NULL) {
 442                 memset(cert_auth.password, 0, strlen(cert_auth.password));
 443                 free(cert_auth.password);
 444                 cert_auth.password = NULL;
 445         }
 446         ssl_cert_password_required = 0;
 447 }
 448
 449 struct active_request_slot *get_active_slot(void)
 450 {
 451         struct active_request_slot *slot = active_queue_head;
 452         struct active_request_slot *newslot;
 453
 454 #ifdef USE_CURL_MULTI
 455         int num_transfers;
 456
 457         /* Wait for a slot to open up if the queue is full */
 458         while (active_requests >= max_requests) {
 459                 curl_multi_perform(curlm, &num_transfers);
 460                 if (num_transfers < active_requests)
 461                         process_curl_messages();
 462         }
 463 #endif
 464
 465         while (slot != NULL && slot->in_use)
 466                 slot = slot->next;
 467
 468         if (slot == NULL) {
 469                 newslot = xmalloc(sizeof(*newslot));
 470                 newslot->curl = NULL;
 471                 newslot->in_use = 0;
 472                 newslot->next = NULL;
 473
 474                 slot = active_queue_head;
 475                 if (slot == NULL) {
 476                         active_queue_head = newslot;
 477                 } else {
 478                         while (slot->next != NULL)
 479                                 slot = slot->next;
 480                         slot->next = newslot;
 481                 }
 482                 slot = newslot;
 483         }
 484
 485         if (slot->curl == NULL) {
 486 #ifdef NO_CURL_EASY_DUPHANDLE
 487                 slot->curl = get_curl_handle();
 488 #else
 489                 slot->curl = curl_easy_duphandle(curl_default);
 490 #endif
 491                 curl_session_count++;
 492         }
 493
 494         active_requests++;
 495         slot->in_use = 1;
 496         slot->results = NULL;
 497         slot->finished = NULL;
 498         slot->callback_data = NULL;
 499         slot->callback_func = NULL;
 500         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 501         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 502         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 503         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 504         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 505         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 506         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 507         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 508         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 509         if (http_auth.password)
 510                 init_curl_http_auth(slot->curl);
 511
 512         return slot;
 513 }
 514
 515 int start_active_slot(struct active_request_slot *slot)
 516 {
 517 #ifdef USE_CURL_MULTI
 518         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 519         int num_transfers;
 520
 521         if (curlm_result != CURLM_OK &&
 522             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 523                 active_requests--;
 524                 slot->in_use = 0;
 525                 return 0;
 526         }
 527
 528         /*
 529          * We know there must be something to do, since we just added
 530          * something.
 531          */
 532         curl_multi_perform(curlm, &num_transfers);
 533 #endif
 534         return 1;
 535 }
 536
 537 #ifdef USE_CURL_MULTI
 538 struct fill_chain {
 539         void *data;
 540         int (*fill)(void *);
 541         struct fill_chain *next;
 542 };
 543
 544 static struct fill_chain *fill_cfg;
 545
 546 void add_fill_function(void *data, int (*fill)(void *))
 547 {
 548         struct fill_chain *new = xmalloc(sizeof(*new));
 549         struct fill_chain **linkp = &fill_cfg;
 550         new->data = data;
 551         new->fill = fill;
 552         new->next = NULL;
 553         while (*linkp)
 554                 linkp = &(*linkp)->next;
 555         *linkp = new;
 556 }
 557
 558 void fill_active_slots(void)
 559 {
 560         struct active_request_slot *slot = active_queue_head;
 561
 562         while (active_requests < max_requests) {
 563                 struct fill_chain *fill;
 564                 for (fill = fill_cfg; fill; fill = fill->next)
 565                         if (fill->fill(fill->data))
 566                                 break;
 567
 568                 if (!fill)
 569                         break;
 570         }
 571
 572         while (slot != NULL) {
 573                 if (!slot->in_use && slot->curl != NULL
 574                         && curl_session_count > min_curl_sessions) {
 575                         curl_easy_cleanup(slot->curl);
 576                         slot->curl = NULL;
 577                         curl_session_count--;
 578                 }
 579                 slot = slot->next;
 580         }
 581 }
 582
 583 void step_active_slots(void)
 584 {
 585         int num_transfers;
 586         CURLMcode curlm_result;
 587
 588         do {
 589                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 590         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 591         if (num_transfers < active_requests) {
 592                 process_curl_messages();
 593                 fill_active_slots();
 594         }
 595 }
 596 #endif
 597
 598 void run_active_slot(struct active_request_slot *slot)
 599 {
 600 #ifdef USE_CURL_MULTI
 601         fd_set readfds;
 602         fd_set writefds;
 603         fd_set excfds;
 604         int max_fd;
 605         struct timeval select_timeout;
 606         int finished = 0;
 607
 608         slot->finished = &finished;
 609         while (!finished) {
 610                 step_active_slots();
 611
 612                 if (slot->in_use) {
 613 #if LIBCURL_VERSION_NUM >= 0x070f04
 614                         long curl_timeout;
 615                         curl_multi_timeout(curlm, &curl_timeout);
 616                         if (curl_timeout == 0) {
 617                                 continue;
 618                         } else if (curl_timeout == -1) {
 619                                 select_timeout.tv_sec  = 0;
 620                                 select_timeout.tv_usec = 50000;
 621                         } else {
 622                                 select_timeout.tv_sec  =  curl_timeout / 1000;
 623                                 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 624                         }
 625 #else
 626                         select_timeout.tv_sec  = 0;
 627                         select_timeout.tv_usec = 50000;
 628 #endif
 629
 630                         max_fd = -1;
 631                         FD_ZERO(&readfds);
 632                         FD_ZERO(&writefds);
 633                         FD_ZERO(&excfds);
 634                         curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 635
 636                         /*
 637                          * It can happen that curl_multi_timeout returns a pathologically
 638                          * long timeout when curl_multi_fdset returns no file descriptors
 639                          * to read.  See commit message for more details.
 640                          */
 641                         if (max_fd < 0 &&
 642                             (select_timeout.tv_sec > 0 ||
 643                              select_timeout.tv_usec > 50000)) {
 644                                 select_timeout.tv_sec  = 0;
 645                                 select_timeout.tv_usec = 50000;
 646                         }
 647
 648                         select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 649                 }
 650         }
 651 #else
 652         while (slot->in_use) {
 653                 slot->curl_result = curl_easy_perform(slot->curl);
 654                 finish_active_slot(slot);
 655         }
 656 #endif
 657 }
 658
 659 static void closedown_active_slot(struct active_request_slot *slot)
 660 {
 661         active_requests--;
 662         slot->in_use = 0;
 663 }
 664
 665 static void release_active_slot(struct active_request_slot *slot)
 666 {
 667         closedown_active_slot(slot);
 668         if (slot->curl && curl_session_count > min_curl_sessions) {
 669 #ifdef USE_CURL_MULTI
 670                 curl_multi_remove_handle(curlm, slot->curl);
 671 #endif
 672                 curl_easy_cleanup(slot->curl);
 673                 slot->curl = NULL;
 674                 curl_session_count--;
 675         }
 676 #ifdef USE_CURL_MULTI
 677         fill_active_slots();
 678 #endif
 679 }
 680
 681 void finish_active_slot(struct active_request_slot *slot)
 682 {
 683         closedown_active_slot(slot);
 684         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 685
 686         if (slot->finished != NULL)
 687                 (*slot->finished) = 1;
 688
 689         /* Store slot results so they can be read after the slot is reused */
 690         if (slot->results != NULL) {
 691                 slot->results->curl_result = slot->curl_result;
 692                 slot->results->http_code = slot->http_code;
 693         }
 694
 695         /* Run callback if appropriate */
 696         if (slot->callback_func != NULL)
 697                 slot->callback_func(slot->callback_data);
 698 }
 699
 700 void finish_all_active_slots(void)
 701 {
 702         struct active_request_slot *slot = active_queue_head;
 703
 704         while (slot != NULL)
 705                 if (slot->in_use) {
 706                         run_active_slot(slot);
 707                         slot = active_queue_head;
 708                 } else {
 709                         slot = slot->next;
 710                 }
 711 }
 712
 713 /* Helpers for modifying and creating URLs */
 714 static inline int needs_quote(int ch)
 715 {
 716         if (((ch >= 'A') && (ch <= 'Z'))
 717                         || ((ch >= 'a') && (ch <= 'z'))
 718                         || ((ch >= '0') && (ch <= '9'))
 719                         || (ch == '/')
 720                         || (ch == '-')
 721                         || (ch == '.'))
 722                 return 0;
 723         return 1;
 724 }
 725
 726 static char *quote_ref_url(const char *base, const char *ref)
 727 {
 728         struct strbuf buf = STRBUF_INIT;
 729         const char *cp;
 730         int ch;
 731
 732         end_url_with_slash(&buf, base);
 733
 734         for (cp = ref; (ch = *cp) != 0; cp++)
 735                 if (needs_quote(ch))
 736                         strbuf_addf(&buf, "%%%02x", ch);
 737                 else
 738                         strbuf_addch(&buf, *cp);
 739
 740         return strbuf_detach(&buf, NULL);
 741 }
 742
 743 void append_remote_object_url(struct strbuf *buf, const char *url,
 744                               const char *hex,
 745                               int only_two_digit_prefix)
 746 {
 747         end_url_with_slash(buf, url);
 748
 749         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 750         if (!only_two_digit_prefix)
 751                 strbuf_addf(buf, "%s", hex+2);
 752 }
 753
 754 char *get_remote_object_url(const char *url, const char *hex,
 755                             int only_two_digit_prefix)
 756 {
 757         struct strbuf buf = STRBUF_INIT;
 758         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 759         return strbuf_detach(&buf, NULL);
 760 }
 761
 762 int handle_curl_result(struct slot_results *results)
 763 {
 764         if (results->curl_result == CURLE_OK) {
 765                 credential_approve(&http_auth);
 766                 return HTTP_OK;
 767         } else if (missing_target(results))
 768                 return HTTP_MISSING_TARGET;
 769         else if (results->http_code == 401) {
 770                 if (http_auth.username && http_auth.password) {
 771                         credential_reject(&http_auth);
 772                         return HTTP_NOAUTH;
 773                 } else {
 774                         credential_fill(&http_auth);
 775                         return HTTP_REAUTH;
 776                 }
 777         } else {
 778 #if LIBCURL_VERSION_NUM >= 0x070c00
 779                 if (!curl_errorstr[0])
 780                         strlcpy(curl_errorstr,
 781                                 curl_easy_strerror(results->curl_result),
 782                                 sizeof(curl_errorstr));
 783 #endif
 784                 return HTTP_ERROR;
 785         }
 786 }
 787
 788 /* http_request() targets */
 789 #define HTTP_REQUEST_STRBUF     0
 790 #define HTTP_REQUEST_FILE       1
 791
 792 static int http_request(const char *url, struct strbuf *type,
 793                         void *result, int target, int options)
 794 {
 795         struct active_request_slot *slot;
 796         struct slot_results results;
 797         struct curl_slist *headers = NULL;
 798         struct strbuf buf = STRBUF_INIT;
 799         int ret;
 800
 801         slot = get_active_slot();
 802         slot->results = &results;
 803         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 804
 805         if (result == NULL) {
 806                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 807         } else {
 808                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 809                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 810
 811                 if (target == HTTP_REQUEST_FILE) {
 812                         long posn = ftell(result);
 813                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 814                                          fwrite);
 815                         if (posn > 0) {
 816                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 817                                 headers = curl_slist_append(headers, buf.buf);
 818                                 strbuf_reset(&buf);
 819                         }
 820                 } else
 821                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 822                                          fwrite_buffer);
 823         }
 824
 825         strbuf_addstr(&buf, "Pragma:");
 826         if (options & HTTP_NO_CACHE)
 827                 strbuf_addstr(&buf, " no-cache");
 828
 829         headers = curl_slist_append(headers, buf.buf);
 830
 831         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 832         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 833         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 834
 835         if (start_active_slot(slot)) {
 836                 run_active_slot(slot);
 837                 ret = handle_curl_result(&results);
 838         } else {
 839                 error("Unable to start HTTP request for %s", url);
 840                 ret = HTTP_START_FAILED;
 841         }
 842
 843         if (type) {
 844                 char *t;
 845                 strbuf_reset(type);
 846                 curl_easy_getinfo(slot->curl, CURLINFO_CONTENT_TYPE, &t);
 847                 if (t)
 848                         strbuf_addstr(type, t);
 849         }
 850
 851         curl_slist_free_all(headers);
 852         strbuf_release(&buf);
 853
 854         return ret;
 855 }
 856
 857 static int http_request_reauth(const char *url,
 858                                struct strbuf *type,
 859                                void *result, int target,
 860                                int options)
 861 {
 862         int ret = http_request(url, type, result, target, options);
 863         if (ret != HTTP_REAUTH)
 864                 return ret;
 865         return http_request(url, type, result, target, options);
 866 }
 867
 868 int http_get_strbuf(const char *url,
 869                     struct strbuf *type,
 870                     struct strbuf *result, int options)
 871 {
 872         return http_request_reauth(url, type, result,
 873                                    HTTP_REQUEST_STRBUF, options);
 874 }
 875
 876 /*
 877  * Downloads a URL and stores the result in the given file.
 878  *
 879  * If a previous interrupted download is detected (i.e. a previous temporary
 880  * file is still around) the download is resumed.
 881  */
 882 static int http_get_file(const char *url, const char *filename, int options)
 883 {
 884         int ret;
 885         struct strbuf tmpfile = STRBUF_INIT;
 886         FILE *result;
 887
 888         strbuf_addf(&tmpfile, "%s.temp", filename);
 889         result = fopen(tmpfile.buf, "a");
 890         if (! result) {
 891                 error("Unable to open local file %s", tmpfile.buf);
 892                 ret = HTTP_ERROR;
 893                 goto cleanup;
 894         }
 895
 896         ret = http_request_reauth(url, NULL, result, HTTP_REQUEST_FILE, options);
 897         fclose(result);
 898
 899         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 900                 ret = HTTP_ERROR;
 901 cleanup:
 902         strbuf_release(&tmpfile);
 903         return ret;
 904 }
 905
 906 int http_error(const char *url, int ret)
 907 {
 908         /* http_request has already handled HTTP_START_FAILED. */
 909         if (ret != HTTP_START_FAILED)
 910                 error("%s while accessing %s", curl_errorstr, url);
 911
 912         return ret;
 913 }
 914
 915 int http_fetch_ref(const char *base, struct ref *ref)
 916 {
 917         char *url;
 918         struct strbuf buffer = STRBUF_INIT;
 919         int ret = -1;
 920
 921         url = quote_ref_url(base, ref->name);
 922         if (http_get_strbuf(url, NULL, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 923                 strbuf_rtrim(&buffer);
 924                 if (buffer.len == 40)
 925                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 926                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 927                         ref->symref = xstrdup(buffer.buf + 5);
 928                         ret = 0;
 929                 }
 930         }
 931
 932         strbuf_release(&buffer);
 933         free(url);
 934         return ret;
 935 }
 936
 937 /* Helpers for fetching packs */
 938 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 939 {
 940         char *url, *tmp;
 941         struct strbuf buf = STRBUF_INIT;
 942
 943         if (http_is_verbose)
 944                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 945
 946         end_url_with_slash(&buf, base_url);
 947         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 948         url = strbuf_detach(&buf, NULL);
 949
 950         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 951         tmp = strbuf_detach(&buf, NULL);
 952
 953         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 954                 error("Unable to get pack index %s", url);
 955                 free(tmp);
 956                 tmp = NULL;
 957         }
 958
 959         free(url);
 960         return tmp;
 961 }
 962
 963 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 964         unsigned char *sha1, const char *base_url)
 965 {
 966         struct packed_git *new_pack;
 967         char *tmp_idx = NULL;
 968         int ret;
 969
 970         if (has_pack_index(sha1)) {
 971                 new_pack = parse_pack_index(sha1, NULL);
 972                 if (!new_pack)
 973                         return -1; /* parse_pack_index() already issued error message */
 974                 goto add_pack;
 975         }
 976
 977         tmp_idx = fetch_pack_index(sha1, base_url);
 978         if (!tmp_idx)
 979                 return -1;
 980
 981         new_pack = parse_pack_index(sha1, tmp_idx);
 982         if (!new_pack) {
 983                 unlink(tmp_idx);
 984                 free(tmp_idx);
 985
 986                 return -1; /* parse_pack_index() already issued error message */
 987         }
 988
 989         ret = verify_pack_index(new_pack);
 990         if (!ret) {
 991                 close_pack_index(new_pack);
 992                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 993         }
 994         free(tmp_idx);
 995         if (ret)
 996                 return -1;
 997
 998 add_pack:
 999         new_pack->next = *packs_head;
1000         *packs_head = new_pack;
1001         return 0;
1002 }
1003
1004 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1005 {
1006         int ret = 0, i = 0;
1007         char *url, *data;
1008         struct strbuf buf = STRBUF_INIT;
1009         unsigned char sha1[20];
1010
1011         end_url_with_slash(&buf, base_url);
1012         strbuf_addstr(&buf, "objects/info/packs");
1013         url = strbuf_detach(&buf, NULL);
1014
1015         ret = http_get_strbuf(url, NULL, &buf, HTTP_NO_CACHE);
1016         if (ret != HTTP_OK)
1017                 goto cleanup;
1018
1019         data = buf.buf;
1020         while (i < buf.len) {
1021                 switch (data[i]) {
1022                 case 'P':
1023                         i++;
1024                         if (i + 52 <= buf.len &&
1025                             !prefixcmp(data + i, " pack-") &&
1026                             !prefixcmp(data + i + 46, ".pack\n")) {
1027                                 get_sha1_hex(data + i + 6, sha1);
1028                                 fetch_and_setup_pack_index(packs_head, sha1,
1029                                                       base_url);
1030                                 i += 51;
1031                                 break;
1032                         }
1033                 default:
1034                         while (i < buf.len && data[i] != '\n')
1035                                 i++;
1036                 }
1037                 i++;
1038         }
1039
1040 cleanup:
1041         free(url);
1042         return ret;
1043 }
1044
1045 void release_http_pack_request(struct http_pack_request *preq)
1046 {
1047         if (preq->packfile != NULL) {
1048                 fclose(preq->packfile);
1049                 preq->packfile = NULL;
1050         }
1051         if (preq->range_header != NULL) {
1052                 curl_slist_free_all(preq->range_header);
1053                 preq->range_header = NULL;
1054         }
1055         preq->slot = NULL;
1056         free(preq->url);
1057 }
1058
1059 int finish_http_pack_request(struct http_pack_request *preq)
1060 {
1061         struct packed_git **lst;
1062         struct packed_git *p = preq->target;
1063         char *tmp_idx;
1064         struct child_process ip;
1065         const char *ip_argv[8];
1066
1067         close_pack_index(p);
1068
1069         fclose(preq->packfile);
1070         preq->packfile = NULL;
1071
1072         lst = preq->lst;
1073         while (*lst != p)
1074                 lst = &((*lst)->next);
1075         *lst = (*lst)->next;
1076
1077         tmp_idx = xstrdup(preq->tmpfile);
1078         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1079                ".idx.temp");
1080
1081         ip_argv[0] = "index-pack";
1082         ip_argv[1] = "-o";
1083         ip_argv[2] = tmp_idx;
1084         ip_argv[3] = preq->tmpfile;
1085         ip_argv[4] = NULL;
1086
1087         memset(&ip, 0, sizeof(ip));
1088         ip.argv = ip_argv;
1089         ip.git_cmd = 1;
1090         ip.no_stdin = 1;
1091         ip.no_stdout = 1;
1092
1093         if (run_command(&ip)) {
1094                 unlink(preq->tmpfile);
1095                 unlink(tmp_idx);
1096                 free(tmp_idx);
1097                 return -1;
1098         }
1099
1100         unlink(sha1_pack_index_name(p->sha1));
1101
1102         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1103          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1104                 free(tmp_idx);
1105                 return -1;
1106         }
1107
1108         install_packed_git(p);
1109         free(tmp_idx);
1110         return 0;
1111 }
1112
1113 struct http_pack_request *new_http_pack_request(
1114         struct packed_git *target, const char *base_url)
1115 {
1116         long prev_posn = 0;
1117         char range[RANGE_HEADER_SIZE];
1118         struct strbuf buf = STRBUF_INIT;
1119         struct http_pack_request *preq;
1120
1121         preq = xcalloc(1, sizeof(*preq));
1122         preq->target = target;
1123
1124         end_url_with_slash(&buf, base_url);
1125         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1126                 sha1_to_hex(target->sha1));
1127         preq->url = strbuf_detach(&buf, NULL);
1128
1129         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1130                 sha1_pack_name(target->sha1));
1131         preq->packfile = fopen(preq->tmpfile, "a");
1132         if (!preq->packfile) {
1133                 error("Unable to open local file %s for pack",
1134                       preq->tmpfile);
1135                 goto abort;
1136         }
1137
1138         preq->slot = get_active_slot();
1139         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1140         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1141         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1142         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1143                 no_pragma_header);
1144
1145         /*
1146          * If there is data present from a previous transfer attempt,
1147          * resume where it left off
1148          */
1149         prev_posn = ftell(preq->packfile);
1150         if (prev_posn>0) {
1151                 if (http_is_verbose)
1152                         fprintf(stderr,
1153                                 "Resuming fetch of pack %s at byte %ld\n",
1154                                 sha1_to_hex(target->sha1), prev_posn);
1155                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1156                 preq->range_header = curl_slist_append(NULL, range);
1157                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1158                         preq->range_header);
1159         }
1160
1161         return preq;
1162
1163 abort:
1164         free(preq->url);
1165         free(preq);
1166         return NULL;
1167 }
1168
1169 /* Helpers for fetching objects (loose) */
1170 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1171                                void *data)
1172 {
1173         unsigned char expn[4096];
1174         size_t size = eltsize * nmemb;
1175         int posn = 0;
1176         struct http_object_request *freq =
1177                 (struct http_object_request *)data;
1178         do {
1179                 ssize_t retval = xwrite(freq->localfile,
1180                                         (char *) ptr + posn, size - posn);
1181                 if (retval < 0)
1182                         return posn;
1183                 posn += retval;
1184         } while (posn < size);
1185
1186         freq->stream.avail_in = size;
1187         freq->stream.next_in = (void *)ptr;
1188         do {
1189                 freq->stream.next_out = expn;
1190                 freq->stream.avail_out = sizeof(expn);
1191                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1192                 git_SHA1_Update(&freq->c, expn,
1193                                 sizeof(expn) - freq->stream.avail_out);
1194         } while (freq->stream.avail_in && freq->zret == Z_OK);
1195         return size;
1196 }
1197
1198 struct http_object_request *new_http_object_request(const char *base_url,
1199         unsigned char *sha1)
1200 {
1201         char *hex = sha1_to_hex(sha1);
1202         char *filename;
1203         char prevfile[PATH_MAX];
1204         int prevlocal;
1205         char prev_buf[PREV_BUF_SIZE];
1206         ssize_t prev_read = 0;
1207         long prev_posn = 0;
1208         char range[RANGE_HEADER_SIZE];
1209         struct curl_slist *range_header = NULL;
1210         struct http_object_request *freq;
1211
1212         freq = xcalloc(1, sizeof(*freq));
1213         hashcpy(freq->sha1, sha1);
1214         freq->localfile = -1;
1215
1216         filename = sha1_file_name(sha1);
1217         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1218                  "%s.temp", filename);
1219
1220         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1221         unlink_or_warn(prevfile);
1222         rename(freq->tmpfile, prevfile);
1223         unlink_or_warn(freq->tmpfile);
1224
1225         if (freq->localfile != -1)
1226                 error("fd leakage in start: %d", freq->localfile);
1227         freq->localfile = open(freq->tmpfile,
1228                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1229         /*
1230          * This could have failed due to the "lazy directory creation";
1231          * try to mkdir the last path component.
1232          */
1233         if (freq->localfile < 0 && errno == ENOENT) {
1234                 char *dir = strrchr(freq->tmpfile, '/');
1235                 if (dir) {
1236                         *dir = 0;
1237                         mkdir(freq->tmpfile, 0777);
1238                         *dir = '/';
1239                 }
1240                 freq->localfile = open(freq->tmpfile,
1241                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1242         }
1243
1244         if (freq->localfile < 0) {
1245                 error("Couldn't create temporary file %s: %s",
1246                       freq->tmpfile, strerror(errno));
1247                 goto abort;
1248         }
1249
1250         git_inflate_init(&freq->stream);
1251
1252         git_SHA1_Init(&freq->c);
1253
1254         freq->url = get_remote_object_url(base_url, hex, 0);
1255
1256         /*
1257          * If a previous temp file is present, process what was already
1258          * fetched.
1259          */
1260         prevlocal = open(prevfile, O_RDONLY);
1261         if (prevlocal != -1) {
1262                 do {
1263                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1264                         if (prev_read>0) {
1265                                 if (fwrite_sha1_file(prev_buf,
1266                                                      1,
1267                                                      prev_read,
1268                                                      freq) == prev_read) {
1269                                         prev_posn += prev_read;
1270                                 } else {
1271                                         prev_read = -1;
1272                                 }
1273                         }
1274                 } while (prev_read > 0);
1275                 close(prevlocal);
1276         }
1277         unlink_or_warn(prevfile);
1278
1279         /*
1280          * Reset inflate/SHA1 if there was an error reading the previous temp
1281          * file; also rewind to the beginning of the local file.
1282          */
1283         if (prev_read == -1) {
1284                 memset(&freq->stream, 0, sizeof(freq->stream));
1285                 git_inflate_init(&freq->stream);
1286                 git_SHA1_Init(&freq->c);
1287                 if (prev_posn>0) {
1288                         prev_posn = 0;
1289                         lseek(freq->localfile, 0, SEEK_SET);
1290                         if (ftruncate(freq->localfile, 0) < 0) {
1291                                 error("Couldn't truncate temporary file %s: %s",
1292                                           freq->tmpfile, strerror(errno));
1293                                 goto abort;
1294                         }
1295                 }
1296         }
1297
1298         freq->slot = get_active_slot();
1299
1300         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1301         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1302         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1303         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1304         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1305
1306         /*
1307          * If we have successfully processed data from a previous fetch
1308          * attempt, only fetch the data we don't already have.
1309          */
1310         if (prev_posn>0) {
1311                 if (http_is_verbose)
1312                         fprintf(stderr,
1313                                 "Resuming fetch of object %s at byte %ld\n",
1314                                 hex, prev_posn);
1315                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1316                 range_header = curl_slist_append(range_header, range);
1317                 curl_easy_setopt(freq->slot->curl,
1318                                  CURLOPT_HTTPHEADER, range_header);
1319         }
1320
1321         return freq;
1322
1323 abort:
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 }