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 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 const char *curl_cookie_file;
  45 static struct credential http_auth = CREDENTIAL_INIT;
  46 static int http_proactive_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 = CREDENTIAL_INIT;
  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         return size;
 104 }
 105
 106 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 107 {
 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.cookiefile", var))
 195                 return git_config_string(&curl_cookie_file, var, value);
 196
 197         if (!strcmp("http.postbuffer", var)) {
 198                 http_post_buffer = git_config_int(var, value);
 199                 if (http_post_buffer < LARGE_PACKET_MAX)
 200                         http_post_buffer = LARGE_PACKET_MAX;
 201                 return 0;
 202         }
 203
 204         if (!strcmp("http.useragent", var))
 205                 return git_config_string(&user_agent, var, value);
 206
 207         /* Fall back on the default ones */
 208         return git_default_config(var, value, cb);
 209 }
 210
 211 static void init_curl_http_auth(CURL *result)
 212 {
 213         if (!http_auth.username)
 214                 return;
 215
 216         credential_fill(&http_auth);
 217
 218 #if LIBCURL_VERSION_NUM >= 0x071301
 219         curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
 220         curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
 221 #else
 222         {
 223                 static struct strbuf up = STRBUF_INIT;
 224                 strbuf_reset(&up);
 225                 strbuf_addf(&up, "%s:%s",
 226                             http_auth.username, http_auth.password);
 227                 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
 228         }
 229 #endif
 230 }
 231
 232 static int has_cert_password(void)
 233 {
 234         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 235                 return 0;
 236         if (!cert_auth.password) {
 237                 cert_auth.protocol = xstrdup("cert");
 238                 cert_auth.path = xstrdup(ssl_cert);
 239                 credential_fill(&cert_auth);
 240         }
 241         return 1;
 242 }
 243
 244 static CURL *get_curl_handle(void)
 245 {
 246         CURL *result = curl_easy_init();
 247
 248         if (!curl_ssl_verify) {
 249                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 250                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 251         } else {
 252                 /* Verify authenticity of the peer's certificate */
 253                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 254                 /* The name in the cert must match whom we tried to connect */
 255                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 256         }
 257
 258 #if LIBCURL_VERSION_NUM >= 0x070907
 259         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 260 #endif
 261 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 262         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 263 #endif
 264
 265         if (http_proactive_auth)
 266                 init_curl_http_auth(result);
 267
 268         if (ssl_cert != NULL)
 269                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 270         if (has_cert_password())
 271                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 272 #if LIBCURL_VERSION_NUM >= 0x070903
 273         if (ssl_key != NULL)
 274                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 275 #endif
 276 #if LIBCURL_VERSION_NUM >= 0x070908
 277         if (ssl_capath != NULL)
 278                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 279 #endif
 280         if (ssl_cainfo != NULL)
 281                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 282         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 283
 284         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 285                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 286                                  curl_low_speed_limit);
 287                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 288                                  curl_low_speed_time);
 289         }
 290
 291         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 292 #if LIBCURL_VERSION_NUM >= 0x071301
 293         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 294 #elif LIBCURL_VERSION_NUM >= 0x071101
 295         curl_easy_setopt(result, CURLOPT_POST301, 1);
 296 #endif
 297
 298         if (getenv("GIT_CURL_VERBOSE"))
 299                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 300
 301         curl_easy_setopt(result, CURLOPT_USERAGENT,
 302                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 303
 304         if (curl_ftp_no_epsv)
 305                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 306
 307         if (curl_http_proxy) {
 308                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 309                 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 310         }
 311
 312         return result;
 313 }
 314
 315 static void set_from_env(const char **var, const char *envname)
 316 {
 317         const char *val = getenv(envname);
 318         if (val)
 319                 *var = val;
 320 }
 321
 322 void http_init(struct remote *remote, const char *url, int proactive_auth)
 323 {
 324         char *low_speed_limit;
 325         char *low_speed_time;
 326
 327         http_is_verbose = 0;
 328
 329         git_config(http_options, NULL);
 330
 331         curl_global_init(CURL_GLOBAL_ALL);
 332
 333         http_proactive_auth = proactive_auth;
 334
 335         if (remote && remote->http_proxy)
 336                 curl_http_proxy = xstrdup(remote->http_proxy);
 337
 338         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 339         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 340
 341 #ifdef USE_CURL_MULTI
 342         {
 343                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 344                 if (http_max_requests != NULL)
 345                         max_requests = atoi(http_max_requests);
 346         }
 347
 348         curlm = curl_multi_init();
 349         if (curlm == NULL) {
 350                 fprintf(stderr, "Error creating curl multi handle.\n");
 351                 exit(1);
 352         }
 353 #endif
 354
 355         if (getenv("GIT_SSL_NO_VERIFY"))
 356                 curl_ssl_verify = 0;
 357
 358         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 359 #if LIBCURL_VERSION_NUM >= 0x070903
 360         set_from_env(&ssl_key, "GIT_SSL_KEY");
 361 #endif
 362 #if LIBCURL_VERSION_NUM >= 0x070908
 363         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 364 #endif
 365         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 366
 367         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 368
 369         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 370         if (low_speed_limit != NULL)
 371                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 372         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 373         if (low_speed_time != NULL)
 374                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 375
 376         if (curl_ssl_verify == -1)
 377                 curl_ssl_verify = 1;
 378
 379         curl_session_count = 0;
 380 #ifdef USE_CURL_MULTI
 381         if (max_requests < 1)
 382                 max_requests = DEFAULT_MAX_REQUESTS;
 383 #endif
 384
 385         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 386                 curl_ftp_no_epsv = 1;
 387
 388         if (url) {
 389                 credential_from_url(&http_auth, url);
 390                 if (!ssl_cert_password_required &&
 391                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 392                     !prefixcmp(url, "https://"))
 393                         ssl_cert_password_required = 1;
 394         }
 395
 396 #ifndef NO_CURL_EASY_DUPHANDLE
 397         curl_default = get_curl_handle();
 398 #endif
 399 }
 400
 401 void http_cleanup(void)
 402 {
 403         struct active_request_slot *slot = active_queue_head;
 404
 405         while (slot != NULL) {
 406                 struct active_request_slot *next = slot->next;
 407                 if (slot->curl != NULL) {
 408 #ifdef USE_CURL_MULTI
 409                         curl_multi_remove_handle(curlm, slot->curl);
 410 #endif
 411                         curl_easy_cleanup(slot->curl);
 412                 }
 413                 free(slot);
 414                 slot = next;
 415         }
 416         active_queue_head = NULL;
 417
 418 #ifndef NO_CURL_EASY_DUPHANDLE
 419         curl_easy_cleanup(curl_default);
 420 #endif
 421
 422 #ifdef USE_CURL_MULTI
 423         curl_multi_cleanup(curlm);
 424 #endif
 425         curl_global_cleanup();
 426
 427         curl_slist_free_all(pragma_header);
 428         pragma_header = NULL;
 429
 430         curl_slist_free_all(no_pragma_header);
 431         no_pragma_header = NULL;
 432
 433         if (curl_http_proxy) {
 434                 free((void *)curl_http_proxy);
 435                 curl_http_proxy = NULL;
 436         }
 437
 438         if (cert_auth.password != NULL) {
 439                 memset(cert_auth.password, 0, strlen(cert_auth.password));
 440                 free(cert_auth.password);
 441                 cert_auth.password = NULL;
 442         }
 443         ssl_cert_password_required = 0;
 444 }
 445
 446 struct active_request_slot *get_active_slot(void)
 447 {
 448         struct active_request_slot *slot = active_queue_head;
 449         struct active_request_slot *newslot;
 450
 451 #ifdef USE_CURL_MULTI
 452         int num_transfers;
 453
 454         /* Wait for a slot to open up if the queue is full */
 455         while (active_requests >= max_requests) {
 456                 curl_multi_perform(curlm, &num_transfers);
 457                 if (num_transfers < active_requests)
 458                         process_curl_messages();
 459         }
 460 #endif
 461
 462         while (slot != NULL && slot->in_use)
 463                 slot = slot->next;
 464
 465         if (slot == NULL) {
 466                 newslot = xmalloc(sizeof(*newslot));
 467                 newslot->curl = NULL;
 468                 newslot->in_use = 0;
 469                 newslot->next = NULL;
 470
 471                 slot = active_queue_head;
 472                 if (slot == NULL) {
 473                         active_queue_head = newslot;
 474                 } else {
 475                         while (slot->next != NULL)
 476                                 slot = slot->next;
 477                         slot->next = newslot;
 478                 }
 479                 slot = newslot;
 480         }
 481
 482         if (slot->curl == NULL) {
 483 #ifdef NO_CURL_EASY_DUPHANDLE
 484                 slot->curl = get_curl_handle();
 485 #else
 486                 slot->curl = curl_easy_duphandle(curl_default);
 487 #endif
 488                 curl_session_count++;
 489         }
 490
 491         active_requests++;
 492         slot->in_use = 1;
 493         slot->results = NULL;
 494         slot->finished = NULL;
 495         slot->callback_data = NULL;
 496         slot->callback_func = NULL;
 497         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 498         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 499         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 500         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 501         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 502         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 503         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 504         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 505         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 506         if (http_auth.password)
 507                 init_curl_http_auth(slot->curl);
 508
 509         return slot;
 510 }
 511
 512 int start_active_slot(struct active_request_slot *slot)
 513 {
 514 #ifdef USE_CURL_MULTI
 515         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 516         int num_transfers;
 517
 518         if (curlm_result != CURLM_OK &&
 519             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 520                 active_requests--;
 521                 slot->in_use = 0;
 522                 return 0;
 523         }
 524
 525         /*
 526          * We know there must be something to do, since we just added
 527          * something.
 528          */
 529         curl_multi_perform(curlm, &num_transfers);
 530 #endif
 531         return 1;
 532 }
 533
 534 #ifdef USE_CURL_MULTI
 535 struct fill_chain {
 536         void *data;
 537         int (*fill)(void *);
 538         struct fill_chain *next;
 539 };
 540
 541 static struct fill_chain *fill_cfg;
 542
 543 void add_fill_function(void *data, int (*fill)(void *))
 544 {
 545         struct fill_chain *new = xmalloc(sizeof(*new));
 546         struct fill_chain **linkp = &fill_cfg;
 547         new->data = data;
 548         new->fill = fill;
 549         new->next = NULL;
 550         while (*linkp)
 551                 linkp = &(*linkp)->next;
 552         *linkp = new;
 553 }
 554
 555 void fill_active_slots(void)
 556 {
 557         struct active_request_slot *slot = active_queue_head;
 558
 559         while (active_requests < max_requests) {
 560                 struct fill_chain *fill;
 561                 for (fill = fill_cfg; fill; fill = fill->next)
 562                         if (fill->fill(fill->data))
 563                                 break;
 564
 565                 if (!fill)
 566                         break;
 567         }
 568
 569         while (slot != NULL) {
 570                 if (!slot->in_use && slot->curl != NULL
 571                         && curl_session_count > min_curl_sessions) {
 572                         curl_easy_cleanup(slot->curl);
 573                         slot->curl = NULL;
 574                         curl_session_count--;
 575                 }
 576                 slot = slot->next;
 577         }
 578 }
 579
 580 void step_active_slots(void)
 581 {
 582         int num_transfers;
 583         CURLMcode curlm_result;
 584
 585         do {
 586                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 587         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 588         if (num_transfers < active_requests) {
 589                 process_curl_messages();
 590                 fill_active_slots();
 591         }
 592 }
 593 #endif
 594
 595 void run_active_slot(struct active_request_slot *slot)
 596 {
 597 #ifdef USE_CURL_MULTI
 598         fd_set readfds;
 599         fd_set writefds;
 600         fd_set excfds;
 601         int max_fd;
 602         struct timeval select_timeout;
 603         int finished = 0;
 604
 605         slot->finished = &finished;
 606         while (!finished) {
 607                 step_active_slots();
 608
 609                 if (slot->in_use) {
 610 #if LIBCURL_VERSION_NUM >= 0x070f04
 611                         long curl_timeout;
 612                         curl_multi_timeout(curlm, &curl_timeout);
 613                         if (curl_timeout == 0) {
 614                                 continue;
 615                         } else if (curl_timeout == -1) {
 616                                 select_timeout.tv_sec  = 0;
 617                                 select_timeout.tv_usec = 50000;
 618                         } else {
 619                                 select_timeout.tv_sec  =  curl_timeout / 1000;
 620                                 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 621                         }
 622 #else
 623                         select_timeout.tv_sec  = 0;
 624                         select_timeout.tv_usec = 50000;
 625 #endif
 626
 627                         max_fd = -1;
 628                         FD_ZERO(&readfds);
 629                         FD_ZERO(&writefds);
 630                         FD_ZERO(&excfds);
 631                         curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 632
 633                         select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 634                 }
 635         }
 636 #else
 637         while (slot->in_use) {
 638                 slot->curl_result = curl_easy_perform(slot->curl);
 639                 finish_active_slot(slot);
 640         }
 641 #endif
 642 }
 643
 644 static void closedown_active_slot(struct active_request_slot *slot)
 645 {
 646         active_requests--;
 647         slot->in_use = 0;
 648 }
 649
 650 static void release_active_slot(struct active_request_slot *slot)
 651 {
 652         closedown_active_slot(slot);
 653         if (slot->curl && curl_session_count > min_curl_sessions) {
 654 #ifdef USE_CURL_MULTI
 655                 curl_multi_remove_handle(curlm, slot->curl);
 656 #endif
 657                 curl_easy_cleanup(slot->curl);
 658                 slot->curl = NULL;
 659                 curl_session_count--;
 660         }
 661 #ifdef USE_CURL_MULTI
 662         fill_active_slots();
 663 #endif
 664 }
 665
 666 void finish_active_slot(struct active_request_slot *slot)
 667 {
 668         closedown_active_slot(slot);
 669         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 670
 671         if (slot->finished != NULL)
 672                 (*slot->finished) = 1;
 673
 674         /* Store slot results so they can be read after the slot is reused */
 675         if (slot->results != NULL) {
 676                 slot->results->curl_result = slot->curl_result;
 677                 slot->results->http_code = slot->http_code;
 678         }
 679
 680         /* Run callback if appropriate */
 681         if (slot->callback_func != NULL)
 682                 slot->callback_func(slot->callback_data);
 683 }
 684
 685 void finish_all_active_slots(void)
 686 {
 687         struct active_request_slot *slot = active_queue_head;
 688
 689         while (slot != NULL)
 690                 if (slot->in_use) {
 691                         run_active_slot(slot);
 692                         slot = active_queue_head;
 693                 } else {
 694                         slot = slot->next;
 695                 }
 696 }
 697
 698 /* Helpers for modifying and creating URLs */
 699 static inline int needs_quote(int ch)
 700 {
 701         if (((ch >= 'A') && (ch <= 'Z'))
 702                         || ((ch >= 'a') && (ch <= 'z'))
 703                         || ((ch >= '0') && (ch <= '9'))
 704                         || (ch == '/')
 705                         || (ch == '-')
 706                         || (ch == '.'))
 707                 return 0;
 708         return 1;
 709 }
 710
 711 static char *quote_ref_url(const char *base, const char *ref)
 712 {
 713         struct strbuf buf = STRBUF_INIT;
 714         const char *cp;
 715         int ch;
 716
 717         end_url_with_slash(&buf, base);
 718
 719         for (cp = ref; (ch = *cp) != 0; cp++)
 720                 if (needs_quote(ch))
 721                         strbuf_addf(&buf, "%%%02x", ch);
 722                 else
 723                         strbuf_addch(&buf, *cp);
 724
 725         return strbuf_detach(&buf, NULL);
 726 }
 727
 728 void append_remote_object_url(struct strbuf *buf, const char *url,
 729                               const char *hex,
 730                               int only_two_digit_prefix)
 731 {
 732         end_url_with_slash(buf, url);
 733
 734         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 735         if (!only_two_digit_prefix)
 736                 strbuf_addf(buf, "%s", hex+2);
 737 }
 738
 739 char *get_remote_object_url(const char *url, const char *hex,
 740                             int only_two_digit_prefix)
 741 {
 742         struct strbuf buf = STRBUF_INIT;
 743         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 744         return strbuf_detach(&buf, NULL);
 745 }
 746
 747 /* http_request() targets */
 748 #define HTTP_REQUEST_STRBUF     0
 749 #define HTTP_REQUEST_FILE       1
 750
 751 static int http_request(const char *url, void *result, int target, int options)
 752 {
 753         struct active_request_slot *slot;
 754         struct slot_results results;
 755         struct curl_slist *headers = NULL;
 756         struct strbuf buf = STRBUF_INIT;
 757         int ret;
 758
 759         slot = get_active_slot();
 760         slot->results = &results;
 761         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 762
 763         if (result == NULL) {
 764                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 765         } else {
 766                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 767                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 768
 769                 if (target == HTTP_REQUEST_FILE) {
 770                         long posn = ftell(result);
 771                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 772                                          fwrite);
 773                         if (posn > 0) {
 774                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 775                                 headers = curl_slist_append(headers, buf.buf);
 776                                 strbuf_reset(&buf);
 777                         }
 778                 } else
 779                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 780                                          fwrite_buffer);
 781         }
 782
 783         strbuf_addstr(&buf, "Pragma:");
 784         if (options & HTTP_NO_CACHE)
 785                 strbuf_addstr(&buf, " no-cache");
 786
 787         headers = curl_slist_append(headers, buf.buf);
 788
 789         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 790         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 791
 792         if (start_active_slot(slot)) {
 793                 run_active_slot(slot);
 794                 if (results.curl_result == CURLE_OK)
 795                         ret = HTTP_OK;
 796                 else if (missing_target(&results))
 797                         ret = HTTP_MISSING_TARGET;
 798                 else if (results.http_code == 401) {
 799                         if (http_auth.username && http_auth.password) {
 800                                 credential_reject(&http_auth);
 801                                 ret = HTTP_NOAUTH;
 802                         } else {
 803                                 credential_fill(&http_auth);
 804                                 init_curl_http_auth(slot->curl);
 805                                 ret = HTTP_REAUTH;
 806                         }
 807                 } else {
 808                         if (!curl_errorstr[0])
 809                                 strlcpy(curl_errorstr,
 810                                         curl_easy_strerror(results.curl_result),
 811                                         sizeof(curl_errorstr));
 812                         ret = HTTP_ERROR;
 813                 }
 814         } else {
 815                 error("Unable to start HTTP request for %s", url);
 816                 ret = HTTP_START_FAILED;
 817         }
 818
 819         curl_slist_free_all(headers);
 820         strbuf_release(&buf);
 821
 822         if (ret == HTTP_OK)
 823                 credential_approve(&http_auth);
 824
 825         return ret;
 826 }
 827
 828 static int http_request_reauth(const char *url, void *result, int target,
 829                                int options)
 830 {
 831         int ret = http_request(url, result, target, options);
 832         if (ret != HTTP_REAUTH)
 833                 return ret;
 834         return http_request(url, result, target, options);
 835 }
 836
 837 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 838 {
 839         return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 840 }
 841
 842 /*
 843  * Downloads a URL and stores the result in the given file.
 844  *
 845  * If a previous interrupted download is detected (i.e. a previous temporary
 846  * file is still around) the download is resumed.
 847  */
 848 static int http_get_file(const char *url, const char *filename, int options)
 849 {
 850         int ret;
 851         struct strbuf tmpfile = STRBUF_INIT;
 852         FILE *result;
 853
 854         strbuf_addf(&tmpfile, "%s.temp", filename);
 855         result = fopen(tmpfile.buf, "a");
 856         if (! result) {
 857                 error("Unable to open local file %s", tmpfile.buf);
 858                 ret = HTTP_ERROR;
 859                 goto cleanup;
 860         }
 861
 862         ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 863         fclose(result);
 864
 865         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 866                 ret = HTTP_ERROR;
 867 cleanup:
 868         strbuf_release(&tmpfile);
 869         return ret;
 870 }
 871
 872 int http_error(const char *url, int ret)
 873 {
 874         /* http_request has already handled HTTP_START_FAILED. */
 875         if (ret != HTTP_START_FAILED)
 876                 error("%s while accessing %s", curl_errorstr, url);
 877
 878         return ret;
 879 }
 880
 881 int http_fetch_ref(const char *base, struct ref *ref)
 882 {
 883         char *url;
 884         struct strbuf buffer = STRBUF_INIT;
 885         int ret = -1;
 886
 887         url = quote_ref_url(base, ref->name);
 888         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 889                 strbuf_rtrim(&buffer);
 890                 if (buffer.len == 40)
 891                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 892                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 893                         ref->symref = xstrdup(buffer.buf + 5);
 894                         ret = 0;
 895                 }
 896         }
 897
 898         strbuf_release(&buffer);
 899         free(url);
 900         return ret;
 901 }
 902
 903 /* Helpers for fetching packs */
 904 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 905 {
 906         char *url, *tmp;
 907         struct strbuf buf = STRBUF_INIT;
 908
 909         if (http_is_verbose)
 910                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 911
 912         end_url_with_slash(&buf, base_url);
 913         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 914         url = strbuf_detach(&buf, NULL);
 915
 916         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 917         tmp = strbuf_detach(&buf, NULL);
 918
 919         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 920                 error("Unable to get pack index %s\n", url);
 921                 free(tmp);
 922                 tmp = NULL;
 923         }
 924
 925         free(url);
 926         return tmp;
 927 }
 928
 929 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 930         unsigned char *sha1, const char *base_url)
 931 {
 932         struct packed_git *new_pack;
 933         char *tmp_idx = NULL;
 934         int ret;
 935
 936         if (has_pack_index(sha1)) {
 937                 new_pack = parse_pack_index(sha1, NULL);
 938                 if (!new_pack)
 939                         return -1; /* parse_pack_index() already issued error message */
 940                 goto add_pack;
 941         }
 942
 943         tmp_idx = fetch_pack_index(sha1, base_url);
 944         if (!tmp_idx)
 945                 return -1;
 946
 947         new_pack = parse_pack_index(sha1, tmp_idx);
 948         if (!new_pack) {
 949                 unlink(tmp_idx);
 950                 free(tmp_idx);
 951
 952                 return -1; /* parse_pack_index() already issued error message */
 953         }
 954
 955         ret = verify_pack_index(new_pack);
 956         if (!ret) {
 957                 close_pack_index(new_pack);
 958                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 959         }
 960         free(tmp_idx);
 961         if (ret)
 962                 return -1;
 963
 964 add_pack:
 965         new_pack->next = *packs_head;
 966         *packs_head = new_pack;
 967         return 0;
 968 }
 969
 970 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
 971 {
 972         int ret = 0, i = 0;
 973         char *url, *data;
 974         struct strbuf buf = STRBUF_INIT;
 975         unsigned char sha1[20];
 976
 977         end_url_with_slash(&buf, base_url);
 978         strbuf_addstr(&buf, "objects/info/packs");
 979         url = strbuf_detach(&buf, NULL);
 980
 981         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
 982         if (ret != HTTP_OK)
 983                 goto cleanup;
 984
 985         data = buf.buf;
 986         while (i < buf.len) {
 987                 switch (data[i]) {
 988                 case 'P':
 989                         i++;
 990                         if (i + 52 <= buf.len &&
 991                             !prefixcmp(data + i, " pack-") &&
 992                             !prefixcmp(data + i + 46, ".pack\n")) {
 993                                 get_sha1_hex(data + i + 6, sha1);
 994                                 fetch_and_setup_pack_index(packs_head, sha1,
 995                                                       base_url);
 996                                 i += 51;
 997                                 break;
 998                         }
 999                 default:
1000                         while (i < buf.len && data[i] != '\n')
1001                                 i++;
1002                 }
1003                 i++;
1004         }
1005
1006 cleanup:
1007         free(url);
1008         return ret;
1009 }
1010
1011 void release_http_pack_request(struct http_pack_request *preq)
1012 {
1013         if (preq->packfile != NULL) {
1014                 fclose(preq->packfile);
1015                 preq->packfile = NULL;
1016         }
1017         if (preq->range_header != NULL) {
1018                 curl_slist_free_all(preq->range_header);
1019                 preq->range_header = NULL;
1020         }
1021         preq->slot = NULL;
1022         free(preq->url);
1023 }
1024
1025 int finish_http_pack_request(struct http_pack_request *preq)
1026 {
1027         struct packed_git **lst;
1028         struct packed_git *p = preq->target;
1029         char *tmp_idx;
1030         struct child_process ip;
1031         const char *ip_argv[8];
1032
1033         close_pack_index(p);
1034
1035         fclose(preq->packfile);
1036         preq->packfile = NULL;
1037
1038         lst = preq->lst;
1039         while (*lst != p)
1040                 lst = &((*lst)->next);
1041         *lst = (*lst)->next;
1042
1043         tmp_idx = xstrdup(preq->tmpfile);
1044         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1045                ".idx.temp");
1046
1047         ip_argv[0] = "index-pack";
1048         ip_argv[1] = "-o";
1049         ip_argv[2] = tmp_idx;
1050         ip_argv[3] = preq->tmpfile;
1051         ip_argv[4] = NULL;
1052
1053         memset(&ip, 0, sizeof(ip));
1054         ip.argv = ip_argv;
1055         ip.git_cmd = 1;
1056         ip.no_stdin = 1;
1057         ip.no_stdout = 1;
1058
1059         if (run_command(&ip)) {
1060                 unlink(preq->tmpfile);
1061                 unlink(tmp_idx);
1062                 free(tmp_idx);
1063                 return -1;
1064         }
1065
1066         unlink(sha1_pack_index_name(p->sha1));
1067
1068         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1069          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1070                 free(tmp_idx);
1071                 return -1;
1072         }
1073
1074         install_packed_git(p);
1075         free(tmp_idx);
1076         return 0;
1077 }
1078
1079 struct http_pack_request *new_http_pack_request(
1080         struct packed_git *target, const char *base_url)
1081 {
1082         long prev_posn = 0;
1083         char range[RANGE_HEADER_SIZE];
1084         struct strbuf buf = STRBUF_INIT;
1085         struct http_pack_request *preq;
1086
1087         preq = xcalloc(1, sizeof(*preq));
1088         preq->target = target;
1089
1090         end_url_with_slash(&buf, base_url);
1091         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1092                 sha1_to_hex(target->sha1));
1093         preq->url = strbuf_detach(&buf, NULL);
1094
1095         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1096                 sha1_pack_name(target->sha1));
1097         preq->packfile = fopen(preq->tmpfile, "a");
1098         if (!preq->packfile) {
1099                 error("Unable to open local file %s for pack",
1100                       preq->tmpfile);
1101                 goto abort;
1102         }
1103
1104         preq->slot = get_active_slot();
1105         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1106         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1107         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1108         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1109                 no_pragma_header);
1110
1111         /*
1112          * If there is data present from a previous transfer attempt,
1113          * resume where it left off
1114          */
1115         prev_posn = ftell(preq->packfile);
1116         if (prev_posn>0) {
1117                 if (http_is_verbose)
1118                         fprintf(stderr,
1119                                 "Resuming fetch of pack %s at byte %ld\n",
1120                                 sha1_to_hex(target->sha1), prev_posn);
1121                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1122                 preq->range_header = curl_slist_append(NULL, range);
1123                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1124                         preq->range_header);
1125         }
1126
1127         return preq;
1128
1129 abort:
1130         free(preq->url);
1131         free(preq);
1132         return NULL;
1133 }
1134
1135 /* Helpers for fetching objects (loose) */
1136 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1137                                void *data)
1138 {
1139         unsigned char expn[4096];
1140         size_t size = eltsize * nmemb;
1141         int posn = 0;
1142         struct http_object_request *freq =
1143                 (struct http_object_request *)data;
1144         do {
1145                 ssize_t retval = xwrite(freq->localfile,
1146                                         (char *) ptr + posn, size - posn);
1147                 if (retval < 0)
1148                         return posn;
1149                 posn += retval;
1150         } while (posn < size);
1151
1152         freq->stream.avail_in = size;
1153         freq->stream.next_in = (void *)ptr;
1154         do {
1155                 freq->stream.next_out = expn;
1156                 freq->stream.avail_out = sizeof(expn);
1157                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1158                 git_SHA1_Update(&freq->c, expn,
1159                                 sizeof(expn) - freq->stream.avail_out);
1160         } while (freq->stream.avail_in && freq->zret == Z_OK);
1161         return size;
1162 }
1163
1164 struct http_object_request *new_http_object_request(const char *base_url,
1165         unsigned char *sha1)
1166 {
1167         char *hex = sha1_to_hex(sha1);
1168         char *filename;
1169         char prevfile[PATH_MAX];
1170         int prevlocal;
1171         char prev_buf[PREV_BUF_SIZE];
1172         ssize_t prev_read = 0;
1173         long prev_posn = 0;
1174         char range[RANGE_HEADER_SIZE];
1175         struct curl_slist *range_header = NULL;
1176         struct http_object_request *freq;
1177
1178         freq = xcalloc(1, sizeof(*freq));
1179         hashcpy(freq->sha1, sha1);
1180         freq->localfile = -1;
1181
1182         filename = sha1_file_name(sha1);
1183         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1184                  "%s.temp", filename);
1185
1186         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1187         unlink_or_warn(prevfile);
1188         rename(freq->tmpfile, prevfile);
1189         unlink_or_warn(freq->tmpfile);
1190
1191         if (freq->localfile != -1)
1192                 error("fd leakage in start: %d", freq->localfile);
1193         freq->localfile = open(freq->tmpfile,
1194                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1195         /*
1196          * This could have failed due to the "lazy directory creation";
1197          * try to mkdir the last path component.
1198          */
1199         if (freq->localfile < 0 && errno == ENOENT) {
1200                 char *dir = strrchr(freq->tmpfile, '/');
1201                 if (dir) {
1202                         *dir = 0;
1203                         mkdir(freq->tmpfile, 0777);
1204                         *dir = '/';
1205                 }
1206                 freq->localfile = open(freq->tmpfile,
1207                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1208         }
1209
1210         if (freq->localfile < 0) {
1211                 error("Couldn't create temporary file %s: %s",
1212                       freq->tmpfile, strerror(errno));
1213                 goto abort;
1214         }
1215
1216         git_inflate_init(&freq->stream);
1217
1218         git_SHA1_Init(&freq->c);
1219
1220         freq->url = get_remote_object_url(base_url, hex, 0);
1221
1222         /*
1223          * If a previous temp file is present, process what was already
1224          * fetched.
1225          */
1226         prevlocal = open(prevfile, O_RDONLY);
1227         if (prevlocal != -1) {
1228                 do {
1229                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1230                         if (prev_read>0) {
1231                                 if (fwrite_sha1_file(prev_buf,
1232                                                      1,
1233                                                      prev_read,
1234                                                      freq) == prev_read) {
1235                                         prev_posn += prev_read;
1236                                 } else {
1237                                         prev_read = -1;
1238                                 }
1239                         }
1240                 } while (prev_read > 0);
1241                 close(prevlocal);
1242         }
1243         unlink_or_warn(prevfile);
1244
1245         /*
1246          * Reset inflate/SHA1 if there was an error reading the previous temp
1247          * file; also rewind to the beginning of the local file.
1248          */
1249         if (prev_read == -1) {
1250                 memset(&freq->stream, 0, sizeof(freq->stream));
1251                 git_inflate_init(&freq->stream);
1252                 git_SHA1_Init(&freq->c);
1253                 if (prev_posn>0) {
1254                         prev_posn = 0;
1255                         lseek(freq->localfile, 0, SEEK_SET);
1256                         if (ftruncate(freq->localfile, 0) < 0) {
1257                                 error("Couldn't truncate temporary file %s: %s",
1258                                           freq->tmpfile, strerror(errno));
1259                                 goto abort;
1260                         }
1261                 }
1262         }
1263
1264         freq->slot = get_active_slot();
1265
1266         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1267         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1268         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1269         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1270         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1271
1272         /*
1273          * If we have successfully processed data from a previous fetch
1274          * attempt, only fetch the data we don't already have.
1275          */
1276         if (prev_posn>0) {
1277                 if (http_is_verbose)
1278                         fprintf(stderr,
1279                                 "Resuming fetch of object %s at byte %ld\n",
1280                                 hex, prev_posn);
1281                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1282                 range_header = curl_slist_append(range_header, range);
1283                 curl_easy_setopt(freq->slot->curl,
1284                                  CURLOPT_HTTPHEADER, range_header);
1285         }
1286
1287         return freq;
1288
1289 abort:
1290         free(freq->url);
1291         free(freq);
1292         return NULL;
1293 }
1294
1295 void process_http_object_request(struct http_object_request *freq)
1296 {
1297         if (freq->slot == NULL)
1298                 return;
1299         freq->curl_result = freq->slot->curl_result;
1300         freq->http_code = freq->slot->http_code;
1301         freq->slot = NULL;
1302 }
1303
1304 int finish_http_object_request(struct http_object_request *freq)
1305 {
1306         struct stat st;
1307
1308         close(freq->localfile);
1309         freq->localfile = -1;
1310
1311         process_http_object_request(freq);
1312
1313         if (freq->http_code == 416) {
1314                 warning("requested range invalid; we may already have all the data.");
1315         } else if (freq->curl_result != CURLE_OK) {
1316                 if (stat(freq->tmpfile, &st) == 0)
1317                         if (st.st_size == 0)
1318                                 unlink_or_warn(freq->tmpfile);
1319                 return -1;
1320         }
1321
1322         git_inflate_end(&freq->stream);
1323         git_SHA1_Final(freq->real_sha1, &freq->c);
1324         if (freq->zret != Z_STREAM_END) {
1325                 unlink_or_warn(freq->tmpfile);
1326                 return -1;
1327         }
1328         if (hashcmp(freq->sha1, freq->real_sha1)) {
1329                 unlink_or_warn(freq->tmpfile);
1330                 return -1;
1331         }
1332         freq->rename =
1333                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1334
1335         return freq->rename;
1336 }
1337
1338 void abort_http_object_request(struct http_object_request *freq)
1339 {
1340         unlink_or_warn(freq->tmpfile);
1341
1342         release_http_object_request(freq);
1343 }
1344
1345 void release_http_object_request(struct http_object_request *freq)
1346 {
1347         if (freq->localfile != -1) {
1348                 close(freq->localfile);
1349                 freq->localfile = -1;
1350         }
1351         if (freq->url != NULL) {
1352                 free(freq->url);
1353                 freq->url = NULL;
1354         }
1355         if (freq->slot != NULL) {
1356                 freq->slot->callback_func = NULL;
1357                 freq->slot->callback_data = NULL;
1358                 release_active_slot(freq->slot);
1359                 freq->slot = NULL;
1360         }
1361 }