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

   1 #include "http.h"
   2 #include "pack.h"
   3 #include "sideband.h"
   4 #include "run-command.h"
   5 #include "url.h"
   6
   7 int data_received;
   8 int active_requests;
   9 int http_is_verbose;
  10 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  11
  12 #if LIBCURL_VERSION_NUM >= 0x070a06
  13 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  14 #endif
  15
  16 static int min_curl_sessions = 1;
  17 static int curl_session_count;
  18 #ifdef USE_CURL_MULTI
  19 static int max_requests = -1;
  20 static CURLM *curlm;
  21 #endif
  22 #ifndef NO_CURL_EASY_DUPHANDLE
  23 static CURL *curl_default;
  24 #endif
  25
  26 #define PREV_BUF_SIZE 4096
  27 #define RANGE_HEADER_SIZE 30
  28
  29 char curl_errorstr[CURL_ERROR_SIZE];
  30
  31 static int curl_ssl_verify = -1;
  32 static const char *ssl_cert;
  33 #if LIBCURL_VERSION_NUM >= 0x070903
  34 static const char *ssl_key;
  35 #endif
  36 #if LIBCURL_VERSION_NUM >= 0x070908
  37 static const char *ssl_capath;
  38 #endif
  39 static const char *ssl_cainfo;
  40 static long curl_low_speed_limit = -1;
  41 static long curl_low_speed_time = -1;
  42 static int curl_ftp_no_epsv;
  43 static const char *curl_http_proxy;
  44 static char *user_name, *user_pass;
  45 static const char *user_agent;
  46
  47 #if LIBCURL_VERSION_NUM >= 0x071700
  48 /* Use CURLOPT_KEYPASSWD as is */
  49 #elif LIBCURL_VERSION_NUM >= 0x070903
  50 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  51 #else
  52 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  53 #endif
  54
  55 static char *ssl_cert_password;
  56 static int ssl_cert_password_required;
  57
  58 static struct curl_slist *pragma_header;
  59 static struct curl_slist *no_pragma_header;
  60
  61 static struct active_request_slot *active_queue_head;
  62
  63 size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  64 {
  65         size_t size = eltsize * nmemb;
  66         struct buffer *buffer = buffer_;
  67
  68         if (size > buffer->buf.len - buffer->posn)
  69                 size = buffer->buf.len - buffer->posn;
  70         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  71         buffer->posn += size;
  72
  73         return size;
  74 }
  75
  76 #ifndef NO_CURL_IOCTL
  77 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  78 {
  79         struct buffer *buffer = clientp;
  80
  81         switch (cmd) {
  82         case CURLIOCMD_NOP:
  83                 return CURLIOE_OK;
  84
  85         case CURLIOCMD_RESTARTREAD:
  86                 buffer->posn = 0;
  87                 return CURLIOE_OK;
  88
  89         default:
  90                 return CURLIOE_UNKNOWNCMD;
  91         }
  92 }
  93 #endif
  94
  95 size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  96 {
  97         size_t size = eltsize * nmemb;
  98         struct strbuf *buffer = buffer_;
  99
 100         strbuf_add(buffer, ptr, size);
 101         data_received++;
 102         return size;
 103 }
 104
 105 size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 106 {
 107         data_received++;
 108         return eltsize * nmemb;
 109 }
 110
 111 #ifdef USE_CURL_MULTI
 112 static void process_curl_messages(void)
 113 {
 114         int num_messages;
 115         struct active_request_slot *slot;
 116         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 117
 118         while (curl_message != NULL) {
 119                 if (curl_message->msg == CURLMSG_DONE) {
 120                         int curl_result = curl_message->data.result;
 121                         slot = active_queue_head;
 122                         while (slot != NULL &&
 123                                slot->curl != curl_message->easy_handle)
 124                                 slot = slot->next;
 125                         if (slot != NULL) {
 126                                 curl_multi_remove_handle(curlm, slot->curl);
 127                                 slot->curl_result = curl_result;
 128                                 finish_active_slot(slot);
 129                         } else {
 130                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 131                         }
 132                 } else {
 133                         fprintf(stderr, "Unknown CURL message received: %d\n",
 134                                 (int)curl_message->msg);
 135                 }
 136                 curl_message = curl_multi_info_read(curlm, &num_messages);
 137         }
 138 }
 139 #endif
 140
 141 static int http_options(const char *var, const char *value, void *cb)
 142 {
 143         if (!strcmp("http.sslverify", var)) {
 144                 curl_ssl_verify = git_config_bool(var, value);
 145                 return 0;
 146         }
 147         if (!strcmp("http.sslcert", var))
 148                 return git_config_string(&ssl_cert, var, value);
 149 #if LIBCURL_VERSION_NUM >= 0x070903
 150         if (!strcmp("http.sslkey", var))
 151                 return git_config_string(&ssl_key, var, value);
 152 #endif
 153 #if LIBCURL_VERSION_NUM >= 0x070908
 154         if (!strcmp("http.sslcapath", var))
 155                 return git_config_string(&ssl_capath, var, value);
 156 #endif
 157         if (!strcmp("http.sslcainfo", var))
 158                 return git_config_string(&ssl_cainfo, var, value);
 159         if (!strcmp("http.sslcertpasswordprotected", var)) {
 160                 if (git_config_bool(var, value))
 161                         ssl_cert_password_required = 1;
 162                 return 0;
 163         }
 164         if (!strcmp("http.minsessions", var)) {
 165                 min_curl_sessions = git_config_int(var, value);
 166 #ifndef USE_CURL_MULTI
 167                 if (min_curl_sessions > 1)
 168                         min_curl_sessions = 1;
 169 #endif
 170                 return 0;
 171         }
 172 #ifdef USE_CURL_MULTI
 173         if (!strcmp("http.maxrequests", var)) {
 174                 max_requests = git_config_int(var, value);
 175                 return 0;
 176         }
 177 #endif
 178         if (!strcmp("http.lowspeedlimit", var)) {
 179                 curl_low_speed_limit = (long)git_config_int(var, value);
 180                 return 0;
 181         }
 182         if (!strcmp("http.lowspeedtime", var)) {
 183                 curl_low_speed_time = (long)git_config_int(var, value);
 184                 return 0;
 185         }
 186
 187         if (!strcmp("http.noepsv", var)) {
 188                 curl_ftp_no_epsv = git_config_bool(var, value);
 189                 return 0;
 190         }
 191         if (!strcmp("http.proxy", var))
 192                 return git_config_string(&curl_http_proxy, var, value);
 193
 194         if (!strcmp("http.postbuffer", var)) {
 195                 http_post_buffer = git_config_int(var, value);
 196                 if (http_post_buffer < LARGE_PACKET_MAX)
 197                         http_post_buffer = LARGE_PACKET_MAX;
 198                 return 0;
 199         }
 200
 201         if (!strcmp("http.useragent", var))
 202                 return git_config_string(&user_agent, var, value);
 203
 204         /* Fall back on the default ones */
 205         return git_default_config(var, value, cb);
 206 }
 207
 208 static void init_curl_http_auth(CURL *result)
 209 {
 210         if (user_name) {
 211                 struct strbuf up = STRBUF_INIT;
 212                 if (!user_pass)
 213                         user_pass = xstrdup(git_getpass("Password: "));
 214                 strbuf_addf(&up, "%s:%s", user_name, user_pass);
 215                 curl_easy_setopt(result, CURLOPT_USERPWD,
 216                                  strbuf_detach(&up, NULL));
 217         }
 218 }
 219
 220 static int has_cert_password(void)
 221 {
 222         if (ssl_cert_password != NULL)
 223                 return 1;
 224         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 225                 return 0;
 226         /* Only prompt the user once. */
 227         ssl_cert_password_required = -1;
 228         ssl_cert_password = git_getpass("Certificate Password: ");
 229         if (ssl_cert_password != NULL) {
 230                 ssl_cert_password = xstrdup(ssl_cert_password);
 231                 return 1;
 232         } else
 233                 return 0;
 234 }
 235
 236 static CURL *get_curl_handle(void)
 237 {
 238         CURL *result = curl_easy_init();
 239
 240         if (!curl_ssl_verify) {
 241                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 242                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 243         } else {
 244                 /* Verify authenticity of the peer's certificate */
 245                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 246                 /* The name in the cert must match whom we tried to connect */
 247                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 248         }
 249
 250 #if LIBCURL_VERSION_NUM >= 0x070907
 251         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 252 #endif
 253 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 254         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 255 #endif
 256
 257         init_curl_http_auth(result);
 258
 259         if (ssl_cert != NULL)
 260                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 261         if (has_cert_password())
 262                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 263 #if LIBCURL_VERSION_NUM >= 0x070903
 264         if (ssl_key != NULL)
 265                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 266 #endif
 267 #if LIBCURL_VERSION_NUM >= 0x070908
 268         if (ssl_capath != NULL)
 269                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 270 #endif
 271         if (ssl_cainfo != NULL)
 272                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 273         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 274
 275         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 276                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 277                                  curl_low_speed_limit);
 278                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 279                                  curl_low_speed_time);
 280         }
 281
 282         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 283 #if LIBCURL_VERSION_NUM >= 0x071301
 284         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 285 #elif LIBCURL_VERSION_NUM >= 0x071101
 286         curl_easy_setopt(result, CURLOPT_POST301, 1);
 287 #endif
 288
 289         if (getenv("GIT_CURL_VERBOSE"))
 290                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 291
 292         curl_easy_setopt(result, CURLOPT_USERAGENT,
 293                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 294
 295         if (curl_ftp_no_epsv)
 296                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 297
 298         if (curl_http_proxy)
 299                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 300
 301         return result;
 302 }
 303
 304 static void http_auth_init(const char *url)
 305 {
 306         char *at, *colon, *cp, *slash, *decoded;
 307         int len;
 308
 309         cp = strstr(url, "://");
 310         if (!cp)
 311                 return;
 312
 313         /*
 314          * Ok, the URL looks like "proto://something".  Which one?
 315          * "proto://<user>:<pass>@<host>/...",
 316          * "proto://<user>@<host>/...", or just
 317          * "proto://<host>/..."?
 318          */
 319         cp += 3;
 320         at = strchr(cp, '@');
 321         colon = strchr(cp, ':');
 322         slash = strchrnul(cp, '/');
 323         if (!at || slash <= at)
 324                 return; /* No credentials */
 325         if (!colon || at <= colon) {
 326                 /* Only username */
 327                 len = at - cp;
 328                 user_name = xmalloc(len + 1);
 329                 memcpy(user_name, cp, len);
 330                 user_name[len] = '\0';
 331                 decoded = url_decode(user_name);
 332                 free(user_name);
 333                 user_name = decoded;
 334                 user_pass = NULL;
 335         } else {
 336                 len = colon - cp;
 337                 user_name = xmalloc(len + 1);
 338                 memcpy(user_name, cp, len);
 339                 user_name[len] = '\0';
 340                 decoded = url_decode(user_name);
 341                 free(user_name);
 342                 user_name = decoded;
 343                 len = at - (colon + 1);
 344                 user_pass = xmalloc(len + 1);
 345                 memcpy(user_pass, colon + 1, len);
 346                 user_pass[len] = '\0';
 347                 decoded = url_decode(user_pass);
 348                 free(user_pass);
 349                 user_pass = decoded;
 350         }
 351 }
 352
 353 static void set_from_env(const char **var, const char *envname)
 354 {
 355         const char *val = getenv(envname);
 356         if (val)
 357                 *var = val;
 358 }
 359
 360 void http_init(struct remote *remote)
 361 {
 362         char *low_speed_limit;
 363         char *low_speed_time;
 364
 365         http_is_verbose = 0;
 366
 367         git_config(http_options, NULL);
 368
 369         curl_global_init(CURL_GLOBAL_ALL);
 370
 371         if (remote && remote->http_proxy)
 372                 curl_http_proxy = xstrdup(remote->http_proxy);
 373
 374         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 375         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 376
 377 #ifdef USE_CURL_MULTI
 378         {
 379                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 380                 if (http_max_requests != NULL)
 381                         max_requests = atoi(http_max_requests);
 382         }
 383
 384         curlm = curl_multi_init();
 385         if (curlm == NULL) {
 386                 fprintf(stderr, "Error creating curl multi handle.\n");
 387                 exit(1);
 388         }
 389 #endif
 390
 391         if (getenv("GIT_SSL_NO_VERIFY"))
 392                 curl_ssl_verify = 0;
 393
 394         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 395 #if LIBCURL_VERSION_NUM >= 0x070903
 396         set_from_env(&ssl_key, "GIT_SSL_KEY");
 397 #endif
 398 #if LIBCURL_VERSION_NUM >= 0x070908
 399         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 400 #endif
 401         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 402
 403         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 404
 405         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 406         if (low_speed_limit != NULL)
 407                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 408         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 409         if (low_speed_time != NULL)
 410                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 411
 412         if (curl_ssl_verify == -1)
 413                 curl_ssl_verify = 1;
 414
 415         curl_session_count = 0;
 416 #ifdef USE_CURL_MULTI
 417         if (max_requests < 1)
 418                 max_requests = DEFAULT_MAX_REQUESTS;
 419 #endif
 420
 421         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 422                 curl_ftp_no_epsv = 1;
 423
 424         if (remote && remote->url && remote->url[0]) {
 425                 http_auth_init(remote->url[0]);
 426                 if (!ssl_cert_password_required &&
 427                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 428                     !prefixcmp(remote->url[0], "https://"))
 429                         ssl_cert_password_required = 1;
 430         }
 431
 432 #ifndef NO_CURL_EASY_DUPHANDLE
 433         curl_default = get_curl_handle();
 434 #endif
 435 }
 436
 437 void http_cleanup(void)
 438 {
 439         struct active_request_slot *slot = active_queue_head;
 440
 441         while (slot != NULL) {
 442                 struct active_request_slot *next = slot->next;
 443                 if (slot->curl != NULL) {
 444 #ifdef USE_CURL_MULTI
 445                         curl_multi_remove_handle(curlm, slot->curl);
 446 #endif
 447                         curl_easy_cleanup(slot->curl);
 448                 }
 449                 free(slot);
 450                 slot = next;
 451         }
 452         active_queue_head = NULL;
 453
 454 #ifndef NO_CURL_EASY_DUPHANDLE
 455         curl_easy_cleanup(curl_default);
 456 #endif
 457
 458 #ifdef USE_CURL_MULTI
 459         curl_multi_cleanup(curlm);
 460 #endif
 461         curl_global_cleanup();
 462
 463         curl_slist_free_all(pragma_header);
 464         pragma_header = NULL;
 465
 466         curl_slist_free_all(no_pragma_header);
 467         no_pragma_header = NULL;
 468
 469         if (curl_http_proxy) {
 470                 free((void *)curl_http_proxy);
 471                 curl_http_proxy = NULL;
 472         }
 473
 474         if (ssl_cert_password != NULL) {
 475                 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 476                 free(ssl_cert_password);
 477                 ssl_cert_password = NULL;
 478         }
 479         ssl_cert_password_required = 0;
 480 }
 481
 482 struct active_request_slot *get_active_slot(void)
 483 {
 484         struct active_request_slot *slot = active_queue_head;
 485         struct active_request_slot *newslot;
 486
 487 #ifdef USE_CURL_MULTI
 488         int num_transfers;
 489
 490         /* Wait for a slot to open up if the queue is full */
 491         while (active_requests >= max_requests) {
 492                 curl_multi_perform(curlm, &num_transfers);
 493                 if (num_transfers < active_requests)
 494                         process_curl_messages();
 495         }
 496 #endif
 497
 498         while (slot != NULL && slot->in_use)
 499                 slot = slot->next;
 500
 501         if (slot == NULL) {
 502                 newslot = xmalloc(sizeof(*newslot));
 503                 newslot->curl = NULL;
 504                 newslot->in_use = 0;
 505                 newslot->next = NULL;
 506
 507                 slot = active_queue_head;
 508                 if (slot == NULL) {
 509                         active_queue_head = newslot;
 510                 } else {
 511                         while (slot->next != NULL)
 512                                 slot = slot->next;
 513                         slot->next = newslot;
 514                 }
 515                 slot = newslot;
 516         }
 517
 518         if (slot->curl == NULL) {
 519 #ifdef NO_CURL_EASY_DUPHANDLE
 520                 slot->curl = get_curl_handle();
 521 #else
 522                 slot->curl = curl_easy_duphandle(curl_default);
 523 #endif
 524                 curl_session_count++;
 525         }
 526
 527         active_requests++;
 528         slot->in_use = 1;
 529         slot->local = NULL;
 530         slot->results = NULL;
 531         slot->finished = NULL;
 532         slot->callback_data = NULL;
 533         slot->callback_func = NULL;
 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_UPLOAD, 0);
 540         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 541
 542         return slot;
 543 }
 544
 545 int start_active_slot(struct active_request_slot *slot)
 546 {
 547 #ifdef USE_CURL_MULTI
 548         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 549         int num_transfers;
 550
 551         if (curlm_result != CURLM_OK &&
 552             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 553                 active_requests--;
 554                 slot->in_use = 0;
 555                 return 0;
 556         }
 557
 558         /*
 559          * We know there must be something to do, since we just added
 560          * something.
 561          */
 562         curl_multi_perform(curlm, &num_transfers);
 563 #endif
 564         return 1;
 565 }
 566
 567 #ifdef USE_CURL_MULTI
 568 struct fill_chain {
 569         void *data;
 570         int (*fill)(void *);
 571         struct fill_chain *next;
 572 };
 573
 574 static struct fill_chain *fill_cfg;
 575
 576 void add_fill_function(void *data, int (*fill)(void *))
 577 {
 578         struct fill_chain *new = xmalloc(sizeof(*new));
 579         struct fill_chain **linkp = &fill_cfg;
 580         new->data = data;
 581         new->fill = fill;
 582         new->next = NULL;
 583         while (*linkp)
 584                 linkp = &(*linkp)->next;
 585         *linkp = new;
 586 }
 587
 588 void fill_active_slots(void)
 589 {
 590         struct active_request_slot *slot = active_queue_head;
 591
 592         while (active_requests < max_requests) {
 593                 struct fill_chain *fill;
 594                 for (fill = fill_cfg; fill; fill = fill->next)
 595                         if (fill->fill(fill->data))
 596                                 break;
 597
 598                 if (!fill)
 599                         break;
 600         }
 601
 602         while (slot != NULL) {
 603                 if (!slot->in_use && slot->curl != NULL
 604                         && curl_session_count > min_curl_sessions) {
 605                         curl_easy_cleanup(slot->curl);
 606                         slot->curl = NULL;
 607                         curl_session_count--;
 608                 }
 609                 slot = slot->next;
 610         }
 611 }
 612
 613 void step_active_slots(void)
 614 {
 615         int num_transfers;
 616         CURLMcode curlm_result;
 617
 618         do {
 619                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 620         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 621         if (num_transfers < active_requests) {
 622                 process_curl_messages();
 623                 fill_active_slots();
 624         }
 625 }
 626 #endif
 627
 628 void run_active_slot(struct active_request_slot *slot)
 629 {
 630 #ifdef USE_CURL_MULTI
 631         long last_pos = 0;
 632         long current_pos;
 633         fd_set readfds;
 634         fd_set writefds;
 635         fd_set excfds;
 636         int max_fd;
 637         struct timeval select_timeout;
 638         int finished = 0;
 639
 640         slot->finished = &finished;
 641         while (!finished) {
 642                 data_received = 0;
 643                 step_active_slots();
 644
 645                 if (!data_received && slot->local != NULL) {
 646                         current_pos = ftell(slot->local);
 647                         if (current_pos > last_pos)
 648                                 data_received++;
 649                         last_pos = current_pos;
 650                 }
 651
 652                 if (slot->in_use && !data_received) {
 653                         max_fd = 0;
 654                         FD_ZERO(&readfds);
 655                         FD_ZERO(&writefds);
 656                         FD_ZERO(&excfds);
 657                         select_timeout.tv_sec = 0;
 658                         select_timeout.tv_usec = 50000;
 659                         select(max_fd, &readfds, &writefds,
 660                                &excfds, &select_timeout);
 661                 }
 662         }
 663 #else
 664         while (slot->in_use) {
 665                 slot->curl_result = curl_easy_perform(slot->curl);
 666                 finish_active_slot(slot);
 667         }
 668 #endif
 669 }
 670
 671 static void closedown_active_slot(struct active_request_slot *slot)
 672 {
 673         active_requests--;
 674         slot->in_use = 0;
 675 }
 676
 677 static void release_active_slot(struct active_request_slot *slot)
 678 {
 679         closedown_active_slot(slot);
 680         if (slot->curl && curl_session_count > min_curl_sessions) {
 681 #ifdef USE_CURL_MULTI
 682                 curl_multi_remove_handle(curlm, slot->curl);
 683 #endif
 684                 curl_easy_cleanup(slot->curl);
 685                 slot->curl = NULL;
 686                 curl_session_count--;
 687         }
 688 #ifdef USE_CURL_MULTI
 689         fill_active_slots();
 690 #endif
 691 }
 692
 693 void finish_active_slot(struct active_request_slot *slot)
 694 {
 695         closedown_active_slot(slot);
 696         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 697
 698         if (slot->finished != NULL)
 699                 (*slot->finished) = 1;
 700
 701         /* Store slot results so they can be read after the slot is reused */
 702         if (slot->results != NULL) {
 703                 slot->results->curl_result = slot->curl_result;
 704                 slot->results->http_code = slot->http_code;
 705         }
 706
 707         /* Run callback if appropriate */
 708         if (slot->callback_func != NULL)
 709                 slot->callback_func(slot->callback_data);
 710 }
 711
 712 void finish_all_active_slots(void)
 713 {
 714         struct active_request_slot *slot = active_queue_head;
 715
 716         while (slot != NULL)
 717                 if (slot->in_use) {
 718                         run_active_slot(slot);
 719                         slot = active_queue_head;
 720                 } else {
 721                         slot = slot->next;
 722                 }
 723 }
 724
 725 /* Helpers for modifying and creating URLs */
 726 static inline int needs_quote(int ch)
 727 {
 728         if (((ch >= 'A') && (ch <= 'Z'))
 729                         || ((ch >= 'a') && (ch <= 'z'))
 730                         || ((ch >= '0') && (ch <= '9'))
 731                         || (ch == '/')
 732                         || (ch == '-')
 733                         || (ch == '.'))
 734                 return 0;
 735         return 1;
 736 }
 737
 738 static inline int hex(int v)
 739 {
 740         if (v < 10)
 741                 return '0' + v;
 742         else
 743                 return 'A' + v - 10;
 744 }
 745
 746 static char *quote_ref_url(const char *base, const char *ref)
 747 {
 748         struct strbuf buf = STRBUF_INIT;
 749         const char *cp;
 750         int ch;
 751
 752         end_url_with_slash(&buf, base);
 753
 754         for (cp = ref; (ch = *cp) != 0; cp++)
 755                 if (needs_quote(ch))
 756                         strbuf_addf(&buf, "%%%02x", ch);
 757                 else
 758                         strbuf_addch(&buf, *cp);
 759
 760         return strbuf_detach(&buf, NULL);
 761 }
 762
 763 void append_remote_object_url(struct strbuf *buf, const char *url,
 764                               const char *hex,
 765                               int only_two_digit_prefix)
 766 {
 767         end_url_with_slash(buf, url);
 768
 769         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 770         if (!only_two_digit_prefix)
 771                 strbuf_addf(buf, "%s", hex+2);
 772 }
 773
 774 char *get_remote_object_url(const char *url, const char *hex,
 775                             int only_two_digit_prefix)
 776 {
 777         struct strbuf buf = STRBUF_INIT;
 778         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 779         return strbuf_detach(&buf, NULL);
 780 }
 781
 782 /* http_request() targets */
 783 #define HTTP_REQUEST_STRBUF     0
 784 #define HTTP_REQUEST_FILE       1
 785
 786 static int http_request(const char *url, void *result, int target, int options)
 787 {
 788         struct active_request_slot *slot;
 789         struct slot_results results;
 790         struct curl_slist *headers = NULL;
 791         struct strbuf buf = STRBUF_INIT;
 792         int ret;
 793
 794         slot = get_active_slot();
 795         slot->results = &results;
 796         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 797
 798         if (result == NULL) {
 799                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 800         } else {
 801                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 802                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 803
 804                 if (target == HTTP_REQUEST_FILE) {
 805                         long posn = ftell(result);
 806                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 807                                          fwrite);
 808                         if (posn > 0) {
 809                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 810                                 headers = curl_slist_append(headers, buf.buf);
 811                                 strbuf_reset(&buf);
 812                         }
 813                         slot->local = result;
 814                 } else
 815                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 816                                          fwrite_buffer);
 817         }
 818
 819         strbuf_addstr(&buf, "Pragma:");
 820         if (options & HTTP_NO_CACHE)
 821                 strbuf_addstr(&buf, " no-cache");
 822
 823         headers = curl_slist_append(headers, buf.buf);
 824
 825         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 826         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 827
 828         if (start_active_slot(slot)) {
 829                 run_active_slot(slot);
 830                 if (results.curl_result == CURLE_OK)
 831                         ret = HTTP_OK;
 832                 else if (missing_target(&results))
 833                         ret = HTTP_MISSING_TARGET;
 834                 else if (results.http_code == 401) {
 835                         if (user_name) {
 836                                 ret = HTTP_NOAUTH;
 837                         } else {
 838                                 /*
 839                                  * git_getpass is needed here because its very likely stdin/stdout are
 840                                  * pipes to our parent process.  So we instead need to use /dev/tty,
 841                                  * but that is non-portable.  Using git_getpass() can at least be stubbed
 842                                  * on other platforms with a different implementation if/when necessary.
 843                                  */
 844                                 user_name = xstrdup(git_getpass("Username: "));
 845                                 init_curl_http_auth(slot->curl);
 846                                 ret = HTTP_REAUTH;
 847                         }
 848                 } else
 849                         ret = HTTP_ERROR;
 850         } else {
 851                 error("Unable to start HTTP request for %s", url);
 852                 ret = HTTP_START_FAILED;
 853         }
 854
 855         slot->local = NULL;
 856         curl_slist_free_all(headers);
 857         strbuf_release(&buf);
 858
 859         return ret;
 860 }
 861
 862 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 863 {
 864         int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 865         if (http_ret == HTTP_REAUTH) {
 866                 http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 867         }
 868         return http_ret;
 869 }
 870
 871 /*
 872  * Downloads an url and stores the result in the given file.
 873  *
 874  * If a previous interrupted download is detected (i.e. a previous temporary
 875  * file is still around) the download is resumed.
 876  */
 877 static int http_get_file(const char *url, const char *filename, int options)
 878 {
 879         int ret;
 880         struct strbuf tmpfile = STRBUF_INIT;
 881         FILE *result;
 882
 883         strbuf_addf(&tmpfile, "%s.temp", filename);
 884         result = fopen(tmpfile.buf, "a");
 885         if (! result) {
 886                 error("Unable to open local file %s", tmpfile.buf);
 887                 ret = HTTP_ERROR;
 888                 goto cleanup;
 889         }
 890
 891         ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 892         fclose(result);
 893
 894         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 895                 ret = HTTP_ERROR;
 896 cleanup:
 897         strbuf_release(&tmpfile);
 898         return ret;
 899 }
 900
 901 int http_error(const char *url, int ret)
 902 {
 903         /* http_request has already handled HTTP_START_FAILED. */
 904         if (ret != HTTP_START_FAILED)
 905                 error("%s while accessing %s\n", curl_errorstr, url);
 906
 907         return ret;
 908 }
 909
 910 int http_fetch_ref(const char *base, struct ref *ref)
 911 {
 912         char *url;
 913         struct strbuf buffer = STRBUF_INIT;
 914         int ret = -1;
 915
 916         url = quote_ref_url(base, ref->name);
 917         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 918                 strbuf_rtrim(&buffer);
 919                 if (buffer.len == 40)
 920                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 921                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 922                         ref->symref = xstrdup(buffer.buf + 5);
 923                         ret = 0;
 924                 }
 925         }
 926
 927         strbuf_release(&buffer);
 928         free(url);
 929         return ret;
 930 }
 931
 932 /* Helpers for fetching packs */
 933 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 934 {
 935         char *url, *tmp;
 936         struct strbuf buf = STRBUF_INIT;
 937
 938         if (http_is_verbose)
 939                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 940
 941         end_url_with_slash(&buf, base_url);
 942         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 943         url = strbuf_detach(&buf, NULL);
 944
 945         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 946         tmp = strbuf_detach(&buf, NULL);
 947
 948         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 949                 error("Unable to get pack index %s\n", url);
 950                 free(tmp);
 951                 tmp = NULL;
 952         }
 953
 954         free(url);
 955         return tmp;
 956 }
 957
 958 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 959         unsigned char *sha1, const char *base_url)
 960 {
 961         struct packed_git *new_pack;
 962         char *tmp_idx = NULL;
 963         int ret;
 964
 965         if (has_pack_index(sha1)) {
 966                 new_pack = parse_pack_index(sha1, NULL);
 967                 if (!new_pack)
 968                         return -1; /* parse_pack_index() already issued error message */
 969                 goto add_pack;
 970         }
 971
 972         tmp_idx = fetch_pack_index(sha1, base_url);
 973         if (!tmp_idx)
 974                 return -1;
 975
 976         new_pack = parse_pack_index(sha1, tmp_idx);
 977         if (!new_pack) {
 978                 unlink(tmp_idx);
 979                 free(tmp_idx);
 980
 981                 return -1; /* parse_pack_index() already issued error message */
 982         }
 983
 984         ret = verify_pack_index(new_pack);
 985         if (!ret) {
 986                 close_pack_index(new_pack);
 987                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 988         }
 989         free(tmp_idx);
 990         if (ret)
 991                 return -1;
 992
 993 add_pack:
 994         new_pack->next = *packs_head;
 995         *packs_head = new_pack;
 996         return 0;
 997 }
 998
 999 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1000 {
1001         int ret = 0, i = 0;
1002         char *url, *data;
1003         struct strbuf buf = STRBUF_INIT;
1004         unsigned char sha1[20];
1005
1006         end_url_with_slash(&buf, base_url);
1007         strbuf_addstr(&buf, "objects/info/packs");
1008         url = strbuf_detach(&buf, NULL);
1009
1010         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1011         if (ret != HTTP_OK)
1012                 goto cleanup;
1013
1014         data = buf.buf;
1015         while (i < buf.len) {
1016                 switch (data[i]) {
1017                 case 'P':
1018                         i++;
1019                         if (i + 52 <= buf.len &&
1020                             !prefixcmp(data + i, " pack-") &&
1021                             !prefixcmp(data + i + 46, ".pack\n")) {
1022                                 get_sha1_hex(data + i + 6, sha1);
1023                                 fetch_and_setup_pack_index(packs_head, sha1,
1024                                                       base_url);
1025                                 i += 51;
1026                                 break;
1027                         }
1028                 default:
1029                         while (i < buf.len && data[i] != '\n')
1030                                 i++;
1031                 }
1032                 i++;
1033         }
1034
1035 cleanup:
1036         free(url);
1037         return ret;
1038 }
1039
1040 void release_http_pack_request(struct http_pack_request *preq)
1041 {
1042         if (preq->packfile != NULL) {
1043                 fclose(preq->packfile);
1044                 preq->packfile = NULL;
1045                 preq->slot->local = NULL;
1046         }
1047         if (preq->range_header != NULL) {
1048                 curl_slist_free_all(preq->range_header);
1049                 preq->range_header = NULL;
1050         }
1051         preq->slot = NULL;
1052         free(preq->url);
1053 }
1054
1055 int finish_http_pack_request(struct http_pack_request *preq)
1056 {
1057         struct packed_git **lst;
1058         struct packed_git *p = preq->target;
1059         char *tmp_idx;
1060         struct child_process ip;
1061         const char *ip_argv[8];
1062
1063         close_pack_index(p);
1064
1065         fclose(preq->packfile);
1066         preq->packfile = NULL;
1067         preq->slot->local = NULL;
1068
1069         lst = preq->lst;
1070         while (*lst != p)
1071                 lst = &((*lst)->next);
1072         *lst = (*lst)->next;
1073
1074         tmp_idx = xstrdup(preq->tmpfile);
1075         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1076                ".idx.temp");
1077
1078         ip_argv[0] = "index-pack";
1079         ip_argv[1] = "-o";
1080         ip_argv[2] = tmp_idx;
1081         ip_argv[3] = preq->tmpfile;
1082         ip_argv[4] = NULL;
1083
1084         memset(&ip, 0, sizeof(ip));
1085         ip.argv = ip_argv;
1086         ip.git_cmd = 1;
1087         ip.no_stdin = 1;
1088         ip.no_stdout = 1;
1089
1090         if (run_command(&ip)) {
1091                 unlink(preq->tmpfile);
1092                 unlink(tmp_idx);
1093                 free(tmp_idx);
1094                 return -1;
1095         }
1096
1097         unlink(sha1_pack_index_name(p->sha1));
1098
1099         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1100          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1101                 free(tmp_idx);
1102                 return -1;
1103         }
1104
1105         install_packed_git(p);
1106         free(tmp_idx);
1107         return 0;
1108 }
1109
1110 struct http_pack_request *new_http_pack_request(
1111         struct packed_git *target, const char *base_url)
1112 {
1113         long prev_posn = 0;
1114         char range[RANGE_HEADER_SIZE];
1115         struct strbuf buf = STRBUF_INIT;
1116         struct http_pack_request *preq;
1117
1118         preq = xmalloc(sizeof(*preq));
1119         preq->target = target;
1120         preq->range_header = NULL;
1121
1122         end_url_with_slash(&buf, base_url);
1123         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1124                 sha1_to_hex(target->sha1));
1125         preq->url = strbuf_detach(&buf, NULL);
1126
1127         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1128                 sha1_pack_name(target->sha1));
1129         preq->packfile = fopen(preq->tmpfile, "a");
1130         if (!preq->packfile) {
1131                 error("Unable to open local file %s for pack",
1132                       preq->tmpfile);
1133                 goto abort;
1134         }
1135
1136         preq->slot = get_active_slot();
1137         preq->slot->local = preq->packfile;
1138         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1139         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1140         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1141         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1142                 no_pragma_header);
1143
1144         /*
1145          * If there is data present from a previous transfer attempt,
1146          * resume where it left off
1147          */
1148         prev_posn = ftell(preq->packfile);
1149         if (prev_posn>0) {
1150                 if (http_is_verbose)
1151                         fprintf(stderr,
1152                                 "Resuming fetch of pack %s at byte %ld\n",
1153                                 sha1_to_hex(target->sha1), prev_posn);
1154                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1155                 preq->range_header = curl_slist_append(NULL, range);
1156                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1157                         preq->range_header);
1158         }
1159
1160         return preq;
1161
1162 abort:
1163         free(preq->url);
1164         free(preq);
1165         return NULL;
1166 }
1167
1168 /* Helpers for fetching objects (loose) */
1169 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
1170                                void *data)
1171 {
1172         unsigned char expn[4096];
1173         size_t size = eltsize * nmemb;
1174         int posn = 0;
1175         struct http_object_request *freq =
1176                 (struct http_object_request *)data;
1177         do {
1178                 ssize_t retval = xwrite(freq->localfile,
1179                                         (char *) ptr + posn, size - posn);
1180                 if (retval < 0)
1181                         return posn;
1182                 posn += retval;
1183         } while (posn < size);
1184
1185         freq->stream.avail_in = size;
1186         freq->stream.next_in = ptr;
1187         do {
1188                 freq->stream.next_out = expn;
1189                 freq->stream.avail_out = sizeof(expn);
1190                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1191                 git_SHA1_Update(&freq->c, expn,
1192                                 sizeof(expn) - freq->stream.avail_out);
1193         } while (freq->stream.avail_in && freq->zret == Z_OK);
1194         data_received++;
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         unsigned 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 = xmalloc(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         memset(&freq->stream, 0, sizeof(freq->stream));
1251
1252         git_inflate_init(&freq->stream);
1253
1254         git_SHA1_Init(&freq->c);
1255
1256         freq->url = get_remote_object_url(base_url, hex, 0);
1257
1258         /*
1259          * If a previous temp file is present, process what was already
1260          * fetched.
1261          */
1262         prevlocal = open(prevfile, O_RDONLY);
1263         if (prevlocal != -1) {
1264                 do {
1265                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1266                         if (prev_read>0) {
1267                                 if (fwrite_sha1_file(prev_buf,
1268                                                      1,
1269                                                      prev_read,
1270                                                      freq) == prev_read) {
1271                                         prev_posn += prev_read;
1272                                 } else {
1273                                         prev_read = -1;
1274                                 }
1275                         }
1276                 } while (prev_read > 0);
1277                 close(prevlocal);
1278         }
1279         unlink_or_warn(prevfile);
1280
1281         /*
1282          * Reset inflate/SHA1 if there was an error reading the previous temp
1283          * file; also rewind to the beginning of the local file.
1284          */
1285         if (prev_read == -1) {
1286                 memset(&freq->stream, 0, sizeof(freq->stream));
1287                 git_inflate_init(&freq->stream);
1288                 git_SHA1_Init(&freq->c);
1289                 if (prev_posn>0) {
1290                         prev_posn = 0;
1291                         lseek(freq->localfile, 0, SEEK_SET);
1292                         if (ftruncate(freq->localfile, 0) < 0) {
1293                                 error("Couldn't truncate temporary file %s: %s",
1294                                           freq->tmpfile, strerror(errno));
1295                                 goto abort;
1296                         }
1297                 }
1298         }
1299
1300         freq->slot = get_active_slot();
1301
1302         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1303         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1304         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1305         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1306         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1307
1308         /*
1309          * If we have successfully processed data from a previous fetch
1310          * attempt, only fetch the data we don't already have.
1311          */
1312         if (prev_posn>0) {
1313                 if (http_is_verbose)
1314                         fprintf(stderr,
1315                                 "Resuming fetch of object %s at byte %ld\n",
1316                                 hex, prev_posn);
1317                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1318                 range_header = curl_slist_append(range_header, range);
1319                 curl_easy_setopt(freq->slot->curl,
1320                                  CURLOPT_HTTPHEADER, range_header);
1321         }
1322
1323         return freq;
1324
1325 abort:
1326         free(filename);
1327         free(freq->url);
1328         free(freq);
1329         return NULL;
1330 }
1331
1332 void process_http_object_request(struct http_object_request *freq)
1333 {
1334         if (freq->slot == NULL)
1335                 return;
1336         freq->curl_result = freq->slot->curl_result;
1337         freq->http_code = freq->slot->http_code;
1338         freq->slot = NULL;
1339 }
1340
1341 int finish_http_object_request(struct http_object_request *freq)
1342 {
1343         struct stat st;
1344
1345         close(freq->localfile);
1346         freq->localfile = -1;
1347
1348         process_http_object_request(freq);
1349
1350         if (freq->http_code == 416) {
1351                 warning("requested range invalid; we may already have all the data.");
1352         } else if (freq->curl_result != CURLE_OK) {
1353                 if (stat(freq->tmpfile, &st) == 0)
1354                         if (st.st_size == 0)
1355                                 unlink_or_warn(freq->tmpfile);
1356                 return -1;
1357         }
1358
1359         git_inflate_end(&freq->stream);
1360         git_SHA1_Final(freq->real_sha1, &freq->c);
1361         if (freq->zret != Z_STREAM_END) {
1362                 unlink_or_warn(freq->tmpfile);
1363                 return -1;
1364         }
1365         if (hashcmp(freq->sha1, freq->real_sha1)) {
1366                 unlink_or_warn(freq->tmpfile);
1367                 return -1;
1368         }
1369         freq->rename =
1370                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1371
1372         return freq->rename;
1373 }
1374
1375 void abort_http_object_request(struct http_object_request *freq)
1376 {
1377         unlink_or_warn(freq->tmpfile);
1378
1379         release_http_object_request(freq);
1380 }
1381
1382 void release_http_object_request(struct http_object_request *freq)
1383 {
1384         if (freq->localfile != -1) {
1385                 close(freq->localfile);
1386                 freq->localfile = -1;
1387         }
1388         if (freq->url != NULL) {
1389                 free(freq->url);
1390                 freq->url = NULL;
1391         }
1392         if (freq->slot != NULL) {
1393                 freq->slot->callback_func = NULL;
1394                 freq->slot->callback_data = NULL;
1395                 release_active_slot(freq->slot);
1396                 freq->slot = NULL;
1397         }
1398 }