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
   8 int data_received;
   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;
  47 static const char *user_agent;
  48
  49 #if LIBCURL_VERSION_NUM >= 0x071700
  50 /* Use CURLOPT_KEYPASSWD as is */
  51 #elif LIBCURL_VERSION_NUM >= 0x070903
  52 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  53 #else
  54 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  55 #endif
  56
  57 static struct credential cert_auth;
  58 static int ssl_cert_password_required;
  59
  60 static struct curl_slist *pragma_header;
  61 static struct curl_slist *no_pragma_header;
  62
  63 static struct active_request_slot *active_queue_head;
  64
  65 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  66 {
  67         size_t size = eltsize * nmemb;
  68         struct buffer *buffer = buffer_;
  69
  70         if (size > buffer->buf.len - buffer->posn)
  71                 size = buffer->buf.len - buffer->posn;
  72         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  73         buffer->posn += size;
  74
  75         return size;
  76 }
  77
  78 #ifndef NO_CURL_IOCTL
  79 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  80 {
  81         struct buffer *buffer = clientp;
  82
  83         switch (cmd) {
  84         case CURLIOCMD_NOP:
  85                 return CURLIOE_OK;
  86
  87         case CURLIOCMD_RESTARTREAD:
  88                 buffer->posn = 0;
  89                 return CURLIOE_OK;
  90
  91         default:
  92                 return CURLIOE_UNKNOWNCMD;
  93         }
  94 }
  95 #endif
  96
  97 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  98 {
  99         size_t size = eltsize * nmemb;
 100         struct strbuf *buffer = buffer_;
 101
 102         strbuf_add(buffer, ptr, size);
 103         data_received++;
 104         return size;
 105 }
 106
 107 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 108 {
 109         data_received++;
 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                 struct strbuf up = STRBUF_INIT;
 217                 credential_fill(&http_auth, NULL);
 218                 strbuf_addf(&up, "%s:%s",
 219                             http_auth.username, http_auth.password);
 220                 curl_easy_setopt(result, CURLOPT_USERPWD,
 221                                  strbuf_detach(&up, NULL));
 222         }
 223 }
 224
 225 static int has_cert_password(void)
 226 {
 227         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 228                 return 0;
 229         if (!cert_auth.description)
 230                 cert_auth.description = "certificate";
 231         if (!cert_auth.unique) {
 232                 struct strbuf unique = STRBUF_INIT;
 233                 strbuf_addf(&unique, "cert:%s", ssl_cert);
 234                 cert_auth.unique = strbuf_detach(&unique, NULL);
 235         }
 236         if (!cert_auth.username)
 237                 cert_auth.username = xstrdup("");
 238         credential_fill(&cert_auth, NULL);
 239         return 1;
 240 }
 241
 242 static CURL *get_curl_handle(void)
 243 {
 244         CURL *result = curl_easy_init();
 245
 246         if (!curl_ssl_verify) {
 247                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 248                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 249         } else {
 250                 /* Verify authenticity of the peer's certificate */
 251                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 252                 /* The name in the cert must match whom we tried to connect */
 253                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 254         }
 255
 256 #if LIBCURL_VERSION_NUM >= 0x070907
 257         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 258 #endif
 259 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 260         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 261 #endif
 262
 263         init_curl_http_auth(result);
 264
 265         if (ssl_cert != NULL)
 266                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 267         if (has_cert_password())
 268                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 269 #if LIBCURL_VERSION_NUM >= 0x070903
 270         if (ssl_key != NULL)
 271                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 272 #endif
 273 #if LIBCURL_VERSION_NUM >= 0x070908
 274         if (ssl_capath != NULL)
 275                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 276 #endif
 277         if (ssl_cainfo != NULL)
 278                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 279         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 280
 281         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 282                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 283                                  curl_low_speed_limit);
 284                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 285                                  curl_low_speed_time);
 286         }
 287
 288         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 289 #if LIBCURL_VERSION_NUM >= 0x071301
 290         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 291 #elif LIBCURL_VERSION_NUM >= 0x071101
 292         curl_easy_setopt(result, CURLOPT_POST301, 1);
 293 #endif
 294
 295         if (getenv("GIT_CURL_VERBOSE"))
 296                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 297
 298         curl_easy_setopt(result, CURLOPT_USERAGENT,
 299                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 300
 301         if (curl_ftp_no_epsv)
 302                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 303
 304         if (curl_http_proxy)
 305                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 306
 307         return result;
 308 }
 309
 310 static void http_auth_init(const char *url)
 311 {
 312         const char *at, *colon, *cp, *slash, *host, *proto_end;
 313         struct strbuf unique = STRBUF_INIT;
 314
 315         proto_end = strstr(url, "://");
 316         if (!proto_end)
 317                 return;
 318
 319         /*
 320          * Ok, the URL looks like "proto://something".  Which one?
 321          * "proto://<user>:<pass>@<host>/...",
 322          * "proto://<user>@<host>/...", or just
 323          * "proto://<host>/..."?
 324          */
 325         cp = proto_end + 3;
 326         at = strchr(cp, '@');
 327         colon = strchr(cp, ':');
 328         slash = strchrnul(cp, '/');
 329
 330         if (!at || slash <= at) {
 331                 /* No credentials, but we may have to ask for some later */
 332                 host = cp;
 333         }
 334         else if (!colon || at <= colon) {
 335                 /* Only username */
 336                 http_auth.username = url_decode_mem(cp, at - cp);
 337                 host = at + 1;
 338         } else {
 339                 http_auth.username = url_decode_mem(cp, colon - cp);
 340                 http_auth.password = url_decode_mem(colon + 1, at - (colon + 1));
 341                 host = at + 1;
 342         }
 343
 344         http_auth.description = url_decode_mem(host, slash - host);
 345
 346         strbuf_add(&unique, url, proto_end - url);
 347         strbuf_addch(&unique, ':');
 348         strbuf_addstr(&unique, http_auth.description);
 349         http_auth.unique = strbuf_detach(&unique, NULL);
 350 }
 351
 352 static void set_from_env(const char **var, const char *envname)
 353 {
 354         const char *val = getenv(envname);
 355         if (val)
 356                 *var = val;
 357 }
 358
 359 void http_init(struct remote *remote)
 360 {
 361         char *low_speed_limit;
 362         char *low_speed_time;
 363
 364         http_is_verbose = 0;
 365
 366         git_config(http_options, NULL);
 367
 368         curl_global_init(CURL_GLOBAL_ALL);
 369
 370         if (remote && remote->http_proxy)
 371                 curl_http_proxy = xstrdup(remote->http_proxy);
 372
 373         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 374         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 375
 376 #ifdef USE_CURL_MULTI
 377         {
 378                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 379                 if (http_max_requests != NULL)
 380                         max_requests = atoi(http_max_requests);
 381         }
 382
 383         curlm = curl_multi_init();
 384         if (curlm == NULL) {
 385                 fprintf(stderr, "Error creating curl multi handle.\n");
 386                 exit(1);
 387         }
 388 #endif
 389
 390         if (getenv("GIT_SSL_NO_VERIFY"))
 391                 curl_ssl_verify = 0;
 392
 393         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 394 #if LIBCURL_VERSION_NUM >= 0x070903
 395         set_from_env(&ssl_key, "GIT_SSL_KEY");
 396 #endif
 397 #if LIBCURL_VERSION_NUM >= 0x070908
 398         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 399 #endif
 400         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 401
 402         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 403
 404         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 405         if (low_speed_limit != NULL)
 406                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 407         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 408         if (low_speed_time != NULL)
 409                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 410
 411         if (curl_ssl_verify == -1)
 412                 curl_ssl_verify = 1;
 413
 414         curl_session_count = 0;
 415 #ifdef USE_CURL_MULTI
 416         if (max_requests < 1)
 417                 max_requests = DEFAULT_MAX_REQUESTS;
 418 #endif
 419
 420         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 421                 curl_ftp_no_epsv = 1;
 422
 423         if (remote && remote->url && remote->url[0]) {
 424                 http_auth_init(remote->url[0]);
 425                 if (!ssl_cert_password_required &&
 426                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 427                     !prefixcmp(remote->url[0], "https://"))
 428                         ssl_cert_password_required = 1;
 429         }
 430
 431 #ifndef NO_CURL_EASY_DUPHANDLE
 432         curl_default = get_curl_handle();
 433 #endif
 434 }
 435
 436 void http_cleanup(void)
 437 {
 438         struct active_request_slot *slot = active_queue_head;
 439
 440         while (slot != NULL) {
 441                 struct active_request_slot *next = slot->next;
 442                 if (slot->curl != NULL) {
 443 #ifdef USE_CURL_MULTI
 444                         curl_multi_remove_handle(curlm, slot->curl);
 445 #endif
 446                         curl_easy_cleanup(slot->curl);
 447                 }
 448                 free(slot);
 449                 slot = next;
 450         }
 451         active_queue_head = NULL;
 452
 453 #ifndef NO_CURL_EASY_DUPHANDLE
 454         curl_easy_cleanup(curl_default);
 455 #endif
 456
 457 #ifdef USE_CURL_MULTI
 458         curl_multi_cleanup(curlm);
 459 #endif
 460         curl_global_cleanup();
 461
 462         curl_slist_free_all(pragma_header);
 463         pragma_header = NULL;
 464
 465         curl_slist_free_all(no_pragma_header);
 466         no_pragma_header = NULL;
 467
 468         if (curl_http_proxy) {
 469                 free((void *)curl_http_proxy);
 470                 curl_http_proxy = NULL;
 471         }
 472
 473         if (cert_auth.password) {
 474                 memset(cert_auth.password, 0, strlen(cert_auth.password));
 475                 free(cert_auth.password);
 476                 cert_auth.password = NULL;
 477         }
 478         ssl_cert_password_required = 0;
 479 }
 480
 481 struct active_request_slot *get_active_slot(void)
 482 {
 483         struct active_request_slot *slot = active_queue_head;
 484         struct active_request_slot *newslot;
 485
 486 #ifdef USE_CURL_MULTI
 487         int num_transfers;
 488
 489         /* Wait for a slot to open up if the queue is full */
 490         while (active_requests >= max_requests) {
 491                 curl_multi_perform(curlm, &num_transfers);
 492                 if (num_transfers < active_requests)
 493                         process_curl_messages();
 494         }
 495 #endif
 496
 497         while (slot != NULL && slot->in_use)
 498                 slot = slot->next;
 499
 500         if (slot == NULL) {
 501                 newslot = xmalloc(sizeof(*newslot));
 502                 newslot->curl = NULL;
 503                 newslot->in_use = 0;
 504                 newslot->next = NULL;
 505
 506                 slot = active_queue_head;
 507                 if (slot == NULL) {
 508                         active_queue_head = newslot;
 509                 } else {
 510                         while (slot->next != NULL)
 511                                 slot = slot->next;
 512                         slot->next = newslot;
 513                 }
 514                 slot = newslot;
 515         }
 516
 517         if (slot->curl == NULL) {
 518 #ifdef NO_CURL_EASY_DUPHANDLE
 519                 slot->curl = get_curl_handle();
 520 #else
 521                 slot->curl = curl_easy_duphandle(curl_default);
 522 #endif
 523                 curl_session_count++;
 524         }
 525
 526         active_requests++;
 527         slot->in_use = 1;
 528         slot->local = NULL;
 529         slot->results = NULL;
 530         slot->finished = NULL;
 531         slot->callback_data = NULL;
 532         slot->callback_func = NULL;
 533         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 534         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 535         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 536         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 537         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 538         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 539         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 540         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 541         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 542
 543         return slot;
 544 }
 545
 546 int start_active_slot(struct active_request_slot *slot)
 547 {
 548 #ifdef USE_CURL_MULTI
 549         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 550         int num_transfers;
 551
 552         if (curlm_result != CURLM_OK &&
 553             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 554                 active_requests--;
 555                 slot->in_use = 0;
 556                 return 0;
 557         }
 558
 559         /*
 560          * We know there must be something to do, since we just added
 561          * something.
 562          */
 563         curl_multi_perform(curlm, &num_transfers);
 564 #endif
 565         return 1;
 566 }
 567
 568 #ifdef USE_CURL_MULTI
 569 struct fill_chain {
 570         void *data;
 571         int (*fill)(void *);
 572         struct fill_chain *next;
 573 };
 574
 575 static struct fill_chain *fill_cfg;
 576
 577 void add_fill_function(void *data, int (*fill)(void *))
 578 {
 579         struct fill_chain *new = xmalloc(sizeof(*new));
 580         struct fill_chain **linkp = &fill_cfg;
 581         new->data = data;
 582         new->fill = fill;
 583         new->next = NULL;
 584         while (*linkp)
 585                 linkp = &(*linkp)->next;
 586         *linkp = new;
 587 }
 588
 589 void fill_active_slots(void)
 590 {
 591         struct active_request_slot *slot = active_queue_head;
 592
 593         while (active_requests < max_requests) {
 594                 struct fill_chain *fill;
 595                 for (fill = fill_cfg; fill; fill = fill->next)
 596                         if (fill->fill(fill->data))
 597                                 break;
 598
 599                 if (!fill)
 600                         break;
 601         }
 602
 603         while (slot != NULL) {
 604                 if (!slot->in_use && slot->curl != NULL
 605                         && curl_session_count > min_curl_sessions) {
 606                         curl_easy_cleanup(slot->curl);
 607                         slot->curl = NULL;
 608                         curl_session_count--;
 609                 }
 610                 slot = slot->next;
 611         }
 612 }
 613
 614 void step_active_slots(void)
 615 {
 616         int num_transfers;
 617         CURLMcode curlm_result;
 618
 619         do {
 620                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 621         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 622         if (num_transfers < active_requests) {
 623                 process_curl_messages();
 624                 fill_active_slots();
 625         }
 626 }
 627 #endif
 628
 629 void run_active_slot(struct active_request_slot *slot)
 630 {
 631 #ifdef USE_CURL_MULTI
 632         long last_pos = 0;
 633         long current_pos;
 634         fd_set readfds;
 635         fd_set writefds;
 636         fd_set excfds;
 637         int max_fd;
 638         struct timeval select_timeout;
 639         int finished = 0;
 640
 641         slot->finished = &finished;
 642         while (!finished) {
 643                 data_received = 0;
 644                 step_active_slots();
 645
 646                 if (!data_received && slot->local != NULL) {
 647                         current_pos = ftell(slot->local);
 648                         if (current_pos > last_pos)
 649                                 data_received++;
 650                         last_pos = current_pos;
 651                 }
 652
 653                 if (slot->in_use && !data_received) {
 654                         max_fd = 0;
 655                         FD_ZERO(&readfds);
 656                         FD_ZERO(&writefds);
 657                         FD_ZERO(&excfds);
 658                         select_timeout.tv_sec = 0;
 659                         select_timeout.tv_usec = 50000;
 660                         select(max_fd, &readfds, &writefds,
 661                                &excfds, &select_timeout);
 662                 }
 663         }
 664 #else
 665         while (slot->in_use) {
 666                 slot->curl_result = curl_easy_perform(slot->curl);
 667                 finish_active_slot(slot);
 668         }
 669 #endif
 670 }
 671
 672 static void closedown_active_slot(struct active_request_slot *slot)
 673 {
 674         active_requests--;
 675         slot->in_use = 0;
 676 }
 677
 678 static void release_active_slot(struct active_request_slot *slot)
 679 {
 680         closedown_active_slot(slot);
 681         if (slot->curl && curl_session_count > min_curl_sessions) {
 682 #ifdef USE_CURL_MULTI
 683                 curl_multi_remove_handle(curlm, slot->curl);
 684 #endif
 685                 curl_easy_cleanup(slot->curl);
 686                 slot->curl = NULL;
 687                 curl_session_count--;
 688         }
 689 #ifdef USE_CURL_MULTI
 690         fill_active_slots();
 691 #endif
 692 }
 693
 694 void finish_active_slot(struct active_request_slot *slot)
 695 {
 696         closedown_active_slot(slot);
 697         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 698
 699         if (slot->finished != NULL)
 700                 (*slot->finished) = 1;
 701
 702         /* Store slot results so they can be read after the slot is reused */
 703         if (slot->results != NULL) {
 704                 slot->results->curl_result = slot->curl_result;
 705                 slot->results->http_code = slot->http_code;
 706         }
 707
 708         /* Run callback if appropriate */
 709         if (slot->callback_func != NULL)
 710                 slot->callback_func(slot->callback_data);
 711 }
 712
 713 void finish_all_active_slots(void)
 714 {
 715         struct active_request_slot *slot = active_queue_head;
 716
 717         while (slot != NULL)
 718                 if (slot->in_use) {
 719                         run_active_slot(slot);
 720                         slot = active_queue_head;
 721                 } else {
 722                         slot = slot->next;
 723                 }
 724 }
 725
 726 /* Helpers for modifying and creating URLs */
 727 static inline int needs_quote(int ch)
 728 {
 729         if (((ch >= 'A') && (ch <= 'Z'))
 730                         || ((ch >= 'a') && (ch <= 'z'))
 731                         || ((ch >= '0') && (ch <= '9'))
 732                         || (ch == '/')
 733                         || (ch == '-')
 734                         || (ch == '.'))
 735                 return 0;
 736         return 1;
 737 }
 738
 739 static inline int hex(int v)
 740 {
 741         if (v < 10)
 742                 return '0' + v;
 743         else
 744                 return 'A' + v - 10;
 745 }
 746
 747 static char *quote_ref_url(const char *base, const char *ref)
 748 {
 749         struct strbuf buf = STRBUF_INIT;
 750         const char *cp;
 751         int ch;
 752
 753         end_url_with_slash(&buf, base);
 754
 755         for (cp = ref; (ch = *cp) != 0; cp++)
 756                 if (needs_quote(ch))
 757                         strbuf_addf(&buf, "%%%02x", ch);
 758                 else
 759                         strbuf_addch(&buf, *cp);
 760
 761         return strbuf_detach(&buf, NULL);
 762 }
 763
 764 void append_remote_object_url(struct strbuf *buf, const char *url,
 765                               const char *hex,
 766                               int only_two_digit_prefix)
 767 {
 768         end_url_with_slash(buf, url);
 769
 770         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 771         if (!only_two_digit_prefix)
 772                 strbuf_addf(buf, "%s", hex+2);
 773 }
 774
 775 char *get_remote_object_url(const char *url, const char *hex,
 776                             int only_two_digit_prefix)
 777 {
 778         struct strbuf buf = STRBUF_INIT;
 779         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 780         return strbuf_detach(&buf, NULL);
 781 }
 782
 783 /* http_request() targets */
 784 #define HTTP_REQUEST_STRBUF     0
 785 #define HTTP_REQUEST_FILE       1
 786
 787 static int http_request(const char *url, void *result, int target, int options)
 788 {
 789         struct active_request_slot *slot;
 790         struct slot_results results;
 791         struct curl_slist *headers = NULL;
 792         struct strbuf buf = STRBUF_INIT;
 793         int ret;
 794
 795         slot = get_active_slot();
 796         slot->results = &results;
 797         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 798
 799         if (result == NULL) {
 800                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 801         } else {
 802                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 803                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 804
 805                 if (target == HTTP_REQUEST_FILE) {
 806                         long posn = ftell(result);
 807                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 808                                          fwrite);
 809                         if (posn > 0) {
 810                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 811                                 headers = curl_slist_append(headers, buf.buf);
 812                                 strbuf_reset(&buf);
 813                         }
 814                         slot->local = result;
 815                 } else
 816                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 817                                          fwrite_buffer);
 818         }
 819
 820         strbuf_addstr(&buf, "Pragma:");
 821         if (options & HTTP_NO_CACHE)
 822                 strbuf_addstr(&buf, " no-cache");
 823
 824         headers = curl_slist_append(headers, buf.buf);
 825
 826         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 827         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 828
 829         if (start_active_slot(slot)) {
 830                 run_active_slot(slot);
 831                 if (results.curl_result == CURLE_OK)
 832                         ret = HTTP_OK;
 833                 else if (missing_target(&results))
 834                         ret = HTTP_MISSING_TARGET;
 835                 else if (results.http_code == 401) {
 836                         if (http_auth.username) {
 837                                 credential_reject(&http_auth, NULL);
 838                                 ret = HTTP_NOAUTH;
 839                         } else {
 840                                 credential_fill(&http_auth, NULL);
 841                                 init_curl_http_auth(slot->curl);
 842                                 ret = HTTP_REAUTH;
 843                         }
 844                 } else
 845                         ret = HTTP_ERROR;
 846         } else {
 847                 error("Unable to start HTTP request for %s", url);
 848                 ret = HTTP_START_FAILED;
 849         }
 850
 851         slot->local = NULL;
 852         curl_slist_free_all(headers);
 853         strbuf_release(&buf);
 854
 855         return ret;
 856 }
 857
 858 static int http_request_reauth(const char *url, void *result, int target,
 859                                int options)
 860 {
 861         int ret = http_request(url, result, target, options);
 862         if (ret != HTTP_REAUTH)
 863                 return ret;
 864         return http_request(url, result, target, options);
 865 }
 866
 867 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 868 {
 869         return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 870 }
 871
 872 /*
 873  * Downloads an url and stores the result in the given file.
 874  *
 875  * If a previous interrupted download is detected (i.e. a previous temporary
 876  * file is still around) the download is resumed.
 877  */
 878 static int http_get_file(const char *url, const char *filename, int options)
 879 {
 880         int ret;
 881         struct strbuf tmpfile = STRBUF_INIT;
 882         FILE *result;
 883
 884         strbuf_addf(&tmpfile, "%s.temp", filename);
 885         result = fopen(tmpfile.buf, "a");
 886         if (! result) {
 887                 error("Unable to open local file %s", tmpfile.buf);
 888                 ret = HTTP_ERROR;
 889                 goto cleanup;
 890         }
 891
 892         ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 893         fclose(result);
 894
 895         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 896                 ret = HTTP_ERROR;
 897 cleanup:
 898         strbuf_release(&tmpfile);
 899         return ret;
 900 }
 901
 902 int http_error(const char *url, int ret)
 903 {
 904         /* http_request has already handled HTTP_START_FAILED. */
 905         if (ret != HTTP_START_FAILED)
 906                 error("%s while accessing %s\n", curl_errorstr, url);
 907
 908         return ret;
 909 }
 910
 911 int http_fetch_ref(const char *base, struct ref *ref)
 912 {
 913         char *url;
 914         struct strbuf buffer = STRBUF_INIT;
 915         int ret = -1;
 916
 917         url = quote_ref_url(base, ref->name);
 918         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 919                 strbuf_rtrim(&buffer);
 920                 if (buffer.len == 40)
 921                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 922                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 923                         ref->symref = xstrdup(buffer.buf + 5);
 924                         ret = 0;
 925                 }
 926         }
 927
 928         strbuf_release(&buffer);
 929         free(url);
 930         return ret;
 931 }
 932
 933 /* Helpers for fetching packs */
 934 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 935 {
 936         char *url, *tmp;
 937         struct strbuf buf = STRBUF_INIT;
 938
 939         if (http_is_verbose)
 940                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 941
 942         end_url_with_slash(&buf, base_url);
 943         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 944         url = strbuf_detach(&buf, NULL);
 945
 946         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 947         tmp = strbuf_detach(&buf, NULL);
 948
 949         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 950                 error("Unable to get pack index %s\n", url);
 951                 free(tmp);
 952                 tmp = NULL;
 953         }
 954
 955         free(url);
 956         return tmp;
 957 }
 958
 959 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 960         unsigned char *sha1, const char *base_url)
 961 {
 962         struct packed_git *new_pack;
 963         char *tmp_idx = NULL;
 964         int ret;
 965
 966         if (has_pack_index(sha1)) {
 967                 new_pack = parse_pack_index(sha1, NULL);
 968                 if (!new_pack)
 969                         return -1; /* parse_pack_index() already issued error message */
 970                 goto add_pack;
 971         }
 972
 973         tmp_idx = fetch_pack_index(sha1, base_url);
 974         if (!tmp_idx)
 975                 return -1;
 976
 977         new_pack = parse_pack_index(sha1, tmp_idx);
 978         if (!new_pack) {
 979                 unlink(tmp_idx);
 980                 free(tmp_idx);
 981
 982                 return -1; /* parse_pack_index() already issued error message */
 983         }
 984
 985         ret = verify_pack_index(new_pack);
 986         if (!ret) {
 987                 close_pack_index(new_pack);
 988                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 989         }
 990         free(tmp_idx);
 991         if (ret)
 992                 return -1;
 993
 994 add_pack:
 995         new_pack->next = *packs_head;
 996         *packs_head = new_pack;
 997         return 0;
 998 }
 999
1000 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1001 {
1002         int ret = 0, i = 0;
1003         char *url, *data;
1004         struct strbuf buf = STRBUF_INIT;
1005         unsigned char sha1[20];
1006
1007         end_url_with_slash(&buf, base_url);
1008         strbuf_addstr(&buf, "objects/info/packs");
1009         url = strbuf_detach(&buf, NULL);
1010
1011         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1012         if (ret != HTTP_OK)
1013                 goto cleanup;
1014
1015         data = buf.buf;
1016         while (i < buf.len) {
1017                 switch (data[i]) {
1018                 case 'P':
1019                         i++;
1020                         if (i + 52 <= buf.len &&
1021                             !prefixcmp(data + i, " pack-") &&
1022                             !prefixcmp(data + i + 46, ".pack\n")) {
1023                                 get_sha1_hex(data + i + 6, sha1);
1024                                 fetch_and_setup_pack_index(packs_head, sha1,
1025                                                       base_url);
1026                                 i += 51;
1027                                 break;
1028                         }
1029                 default:
1030                         while (i < buf.len && data[i] != '\n')
1031                                 i++;
1032                 }
1033                 i++;
1034         }
1035
1036 cleanup:
1037         free(url);
1038         return ret;
1039 }
1040
1041 void release_http_pack_request(struct http_pack_request *preq)
1042 {
1043         if (preq->packfile != NULL) {
1044                 fclose(preq->packfile);
1045                 preq->packfile = NULL;
1046                 preq->slot->local = NULL;
1047         }
1048         if (preq->range_header != NULL) {
1049                 curl_slist_free_all(preq->range_header);
1050                 preq->range_header = NULL;
1051         }
1052         preq->slot = NULL;
1053         free(preq->url);
1054 }
1055
1056 int finish_http_pack_request(struct http_pack_request *preq)
1057 {
1058         struct packed_git **lst;
1059         struct packed_git *p = preq->target;
1060         char *tmp_idx;
1061         struct child_process ip;
1062         const char *ip_argv[8];
1063
1064         close_pack_index(p);
1065
1066         fclose(preq->packfile);
1067         preq->packfile = NULL;
1068         preq->slot->local = NULL;
1069
1070         lst = preq->lst;
1071         while (*lst != p)
1072                 lst = &((*lst)->next);
1073         *lst = (*lst)->next;
1074
1075         tmp_idx = xstrdup(preq->tmpfile);
1076         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1077                ".idx.temp");
1078
1079         ip_argv[0] = "index-pack";
1080         ip_argv[1] = "-o";
1081         ip_argv[2] = tmp_idx;
1082         ip_argv[3] = preq->tmpfile;
1083         ip_argv[4] = NULL;
1084
1085         memset(&ip, 0, sizeof(ip));
1086         ip.argv = ip_argv;
1087         ip.git_cmd = 1;
1088         ip.no_stdin = 1;
1089         ip.no_stdout = 1;
1090
1091         if (run_command(&ip)) {
1092                 unlink(preq->tmpfile);
1093                 unlink(tmp_idx);
1094                 free(tmp_idx);
1095                 return -1;
1096         }
1097
1098         unlink(sha1_pack_index_name(p->sha1));
1099
1100         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1101          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1102                 free(tmp_idx);
1103                 return -1;
1104         }
1105
1106         install_packed_git(p);
1107         free(tmp_idx);
1108         return 0;
1109 }
1110
1111 struct http_pack_request *new_http_pack_request(
1112         struct packed_git *target, const char *base_url)
1113 {
1114         long prev_posn = 0;
1115         char range[RANGE_HEADER_SIZE];
1116         struct strbuf buf = STRBUF_INIT;
1117         struct http_pack_request *preq;
1118
1119         preq = xmalloc(sizeof(*preq));
1120         preq->target = target;
1121         preq->range_header = NULL;
1122
1123         end_url_with_slash(&buf, base_url);
1124         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1125                 sha1_to_hex(target->sha1));
1126         preq->url = strbuf_detach(&buf, NULL);
1127
1128         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1129                 sha1_pack_name(target->sha1));
1130         preq->packfile = fopen(preq->tmpfile, "a");
1131         if (!preq->packfile) {
1132                 error("Unable to open local file %s for pack",
1133                       preq->tmpfile);
1134                 goto abort;
1135         }
1136
1137         preq->slot = get_active_slot();
1138         preq->slot->local = preq->packfile;
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         data_received++;
1196         return size;
1197 }
1198
1199 struct http_object_request *new_http_object_request(const char *base_url,
1200         unsigned char *sha1)
1201 {
1202         char *hex = sha1_to_hex(sha1);
1203         char *filename;
1204         char prevfile[PATH_MAX];
1205         int prevlocal;
1206         char prev_buf[PREV_BUF_SIZE];
1207         ssize_t prev_read = 0;
1208         long prev_posn = 0;
1209         char range[RANGE_HEADER_SIZE];
1210         struct curl_slist *range_header = NULL;
1211         struct http_object_request *freq;
1212
1213         freq = xmalloc(sizeof(*freq));
1214         hashcpy(freq->sha1, sha1);
1215         freq->localfile = -1;
1216
1217         filename = sha1_file_name(sha1);
1218         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1219                  "%s.temp", filename);
1220
1221         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1222         unlink_or_warn(prevfile);
1223         rename(freq->tmpfile, prevfile);
1224         unlink_or_warn(freq->tmpfile);
1225
1226         if (freq->localfile != -1)
1227                 error("fd leakage in start: %d", freq->localfile);
1228         freq->localfile = open(freq->tmpfile,
1229                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1230         /*
1231          * This could have failed due to the "lazy directory creation";
1232          * try to mkdir the last path component.
1233          */
1234         if (freq->localfile < 0 && errno == ENOENT) {
1235                 char *dir = strrchr(freq->tmpfile, '/');
1236                 if (dir) {
1237                         *dir = 0;
1238                         mkdir(freq->tmpfile, 0777);
1239                         *dir = '/';
1240                 }
1241                 freq->localfile = open(freq->tmpfile,
1242                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1243         }
1244
1245         if (freq->localfile < 0) {
1246                 error("Couldn't create temporary file %s: %s",
1247                       freq->tmpfile, strerror(errno));
1248                 goto abort;
1249         }
1250
1251         memset(&freq->stream, 0, sizeof(freq->stream));
1252
1253         git_inflate_init(&freq->stream);
1254
1255         git_SHA1_Init(&freq->c);
1256
1257         freq->url = get_remote_object_url(base_url, hex, 0);
1258
1259         /*
1260          * If a previous temp file is present, process what was already
1261          * fetched.
1262          */
1263         prevlocal = open(prevfile, O_RDONLY);
1264         if (prevlocal != -1) {
1265                 do {
1266                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1267                         if (prev_read>0) {
1268                                 if (fwrite_sha1_file(prev_buf,
1269                                                      1,
1270                                                      prev_read,
1271                                                      freq) == prev_read) {
1272                                         prev_posn += prev_read;
1273                                 } else {
1274                                         prev_read = -1;
1275                                 }
1276                         }
1277                 } while (prev_read > 0);
1278                 close(prevlocal);
1279         }
1280         unlink_or_warn(prevfile);
1281
1282         /*
1283          * Reset inflate/SHA1 if there was an error reading the previous temp
1284          * file; also rewind to the beginning of the local file.
1285          */
1286         if (prev_read == -1) {
1287                 memset(&freq->stream, 0, sizeof(freq->stream));
1288                 git_inflate_init(&freq->stream);
1289                 git_SHA1_Init(&freq->c);
1290                 if (prev_posn>0) {
1291                         prev_posn = 0;
1292                         lseek(freq->localfile, 0, SEEK_SET);
1293                         if (ftruncate(freq->localfile, 0) < 0) {
1294                                 error("Couldn't truncate temporary file %s: %s",
1295                                           freq->tmpfile, strerror(errno));
1296                                 goto abort;
1297                         }
1298                 }
1299         }
1300
1301         freq->slot = get_active_slot();
1302
1303         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1304         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1305         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1306         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1307         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1308
1309         /*
1310          * If we have successfully processed data from a previous fetch
1311          * attempt, only fetch the data we don't already have.
1312          */
1313         if (prev_posn>0) {
1314                 if (http_is_verbose)
1315                         fprintf(stderr,
1316                                 "Resuming fetch of object %s at byte %ld\n",
1317                                 hex, prev_posn);
1318                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1319                 range_header = curl_slist_append(range_header, range);
1320                 curl_easy_setopt(freq->slot->curl,
1321                                  CURLOPT_HTTPHEADER, range_header);
1322         }
1323
1324         return freq;
1325
1326 abort:
1327         free(filename);
1328         free(freq->url);
1329         free(freq);
1330         return NULL;
1331 }
1332
1333 void process_http_object_request(struct http_object_request *freq)
1334 {
1335         if (freq->slot == NULL)
1336                 return;
1337         freq->curl_result = freq->slot->curl_result;
1338         freq->http_code = freq->slot->http_code;
1339         freq->slot = NULL;
1340 }
1341
1342 int finish_http_object_request(struct http_object_request *freq)
1343 {
1344         struct stat st;
1345
1346         close(freq->localfile);
1347         freq->localfile = -1;
1348
1349         process_http_object_request(freq);
1350
1351         if (freq->http_code == 416) {
1352                 warning("requested range invalid; we may already have all the data.");
1353         } else if (freq->curl_result != CURLE_OK) {
1354                 if (stat(freq->tmpfile, &st) == 0)
1355                         if (st.st_size == 0)
1356                                 unlink_or_warn(freq->tmpfile);
1357                 return -1;
1358         }
1359
1360         git_inflate_end(&freq->stream);
1361         git_SHA1_Final(freq->real_sha1, &freq->c);
1362         if (freq->zret != Z_STREAM_END) {
1363                 unlink_or_warn(freq->tmpfile);
1364                 return -1;
1365         }
1366         if (hashcmp(freq->sha1, freq->real_sha1)) {
1367                 unlink_or_warn(freq->tmpfile);
1368                 return -1;
1369         }
1370         freq->rename =
1371                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1372
1373         return freq->rename;
1374 }
1375
1376 void abort_http_object_request(struct http_object_request *freq)
1377 {
1378         unlink_or_warn(freq->tmpfile);
1379
1380         release_http_object_request(freq);
1381 }
1382
1383 void release_http_object_request(struct http_object_request *freq)
1384 {
1385         if (freq->localfile != -1) {
1386                 close(freq->localfile);
1387                 freq->localfile = -1;
1388         }
1389         if (freq->url != NULL) {
1390                 free(freq->url);
1391                 freq->url = NULL;
1392         }
1393         if (freq->slot != NULL) {
1394                 freq->slot->callback_func = NULL;
1395                 freq->slot->callback_data = NULL;
1396                 release_active_slot(freq->slot);
1397                 freq->slot = NULL;
1398         }
1399 }