http.c

   1 #include "http.h"
   2 #include "pack.h"
   3 #include "sideband.h"
   4 #include "run-command.h"
   5 #include "url.h"
   6 #include "credential.h"
   7 #include "version.h"
   8
   9 int active_requests;
  10 int http_is_verbose;
  11 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  12
  13 #if LIBCURL_VERSION_NUM >= 0x070a06
  14 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  15 #endif
  16
  17 static int min_curl_sessions = 1;
  18 static int curl_session_count;
  19 #ifdef USE_CURL_MULTI
  20 static int max_requests = -1;
  21 static CURLM *curlm;
  22 #endif
  23 #ifndef NO_CURL_EASY_DUPHANDLE
  24 static CURL *curl_default;
  25 #endif
  26
  27 #define PREV_BUF_SIZE 4096
  28 #define RANGE_HEADER_SIZE 30
  29
  30 char curl_errorstr[CURL_ERROR_SIZE];
  31
  32 static int curl_ssl_verify = -1;
  33 static const char *ssl_cert;
  34 #if LIBCURL_VERSION_NUM >= 0x070903
  35 static const char *ssl_key;
  36 #endif
  37 #if LIBCURL_VERSION_NUM >= 0x070908
  38 static const char *ssl_capath;
  39 #endif
  40 static const char *ssl_cainfo;
  41 static long curl_low_speed_limit = -1;
  42 static long curl_low_speed_time = -1;
  43 static int curl_ftp_no_epsv;
  44 static const char *curl_http_proxy;
  45 static const char *curl_cookie_file;
  46 static struct credential http_auth = CREDENTIAL_INIT;
  47 static int http_proactive_auth;
  48 static const char *user_agent;
  49
  50 #if LIBCURL_VERSION_NUM >= 0x071700
  51 /* Use CURLOPT_KEYPASSWD as is */
  52 #elif LIBCURL_VERSION_NUM >= 0x070903
  53 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  54 #else
  55 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  56 #endif
  57
  58 static struct credential cert_auth = CREDENTIAL_INIT;
  59 static int ssl_cert_password_required;
  60
  61 static struct curl_slist *pragma_header;
  62 static struct curl_slist *no_pragma_header;
  63
  64 static struct active_request_slot *active_queue_head;
  65
  66 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  67 {
  68         size_t size = eltsize * nmemb;
  69         struct buffer *buffer = buffer_;
  70
  71         if (size > buffer->buf.len - buffer->posn)
  72                 size = buffer->buf.len - buffer->posn;
  73         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  74         buffer->posn += size;
  75
  76         return size;
  77 }
  78
  79 #ifndef NO_CURL_IOCTL
  80 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  81 {
  82         struct buffer *buffer = clientp;
  83
  84         switch (cmd) {
  85         case CURLIOCMD_NOP:
  86                 return CURLIOE_OK;
  87
  88         case CURLIOCMD_RESTARTREAD:
  89                 buffer->posn = 0;
  90                 return CURLIOE_OK;
  91
  92         default:
  93                 return CURLIOE_UNKNOWNCMD;
  94         }
  95 }
  96 #endif
  97
  98 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  99 {
 100         size_t size = eltsize * nmemb;
 101         struct strbuf *buffer = buffer_;
 102
 103         strbuf_add(buffer, ptr, size);
 104         return size;
 105 }
 106
 107 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 108 {
 109         return eltsize * nmemb;
 110 }
 111
 112 #ifdef USE_CURL_MULTI
 113 static void process_curl_messages(void)
 114 {
 115         int num_messages;
 116         struct active_request_slot *slot;
 117         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 118
 119         while (curl_message != NULL) {
 120                 if (curl_message->msg == CURLMSG_DONE) {
 121                         int curl_result = curl_message->data.result;
 122                         slot = active_queue_head;
 123                         while (slot != NULL &&
 124                                slot->curl != curl_message->easy_handle)
 125                                 slot = slot->next;
 126                         if (slot != NULL) {
 127                                 curl_multi_remove_handle(curlm, slot->curl);
 128                                 slot->curl_result = curl_result;
 129                                 finish_active_slot(slot);
 130                         } else {
 131                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 132                         }
 133                 } else {
 134                         fprintf(stderr, "Unknown CURL message received: %d\n",
 135                                 (int)curl_message->msg);
 136                 }
 137                 curl_message = curl_multi_info_read(curlm, &num_messages);
 138         }
 139 }
 140 #endif
 141
 142 static int http_options(const char *var, const char *value, void *cb)
 143 {
 144         if (!strcmp("http.sslverify", var)) {
 145                 curl_ssl_verify = git_config_bool(var, value);
 146                 return 0;
 147         }
 148         if (!strcmp("http.sslcert", var))
 149                 return git_config_string(&ssl_cert, var, value);
 150 #if LIBCURL_VERSION_NUM >= 0x070903
 151         if (!strcmp("http.sslkey", var))
 152                 return git_config_string(&ssl_key, var, value);
 153 #endif
 154 #if LIBCURL_VERSION_NUM >= 0x070908
 155         if (!strcmp("http.sslcapath", var))
 156                 return git_config_string(&ssl_capath, var, value);
 157 #endif
 158         if (!strcmp("http.sslcainfo", var))
 159                 return git_config_string(&ssl_cainfo, var, value);
 160         if (!strcmp("http.sslcertpasswordprotected", var)) {
 161                 if (git_config_bool(var, value))
 162                         ssl_cert_password_required = 1;
 163                 return 0;
 164         }
 165         if (!strcmp("http.minsessions", var)) {
 166                 min_curl_sessions = git_config_int(var, value);
 167 #ifndef USE_CURL_MULTI
 168                 if (min_curl_sessions > 1)
 169                         min_curl_sessions = 1;
 170 #endif
 171                 return 0;
 172         }
 173 #ifdef USE_CURL_MULTI
 174         if (!strcmp("http.maxrequests", var)) {
 175                 max_requests = git_config_int(var, value);
 176                 return 0;
 177         }
 178 #endif
 179         if (!strcmp("http.lowspeedlimit", var)) {
 180                 curl_low_speed_limit = (long)git_config_int(var, value);
 181                 return 0;
 182         }
 183         if (!strcmp("http.lowspeedtime", var)) {
 184                 curl_low_speed_time = (long)git_config_int(var, value);
 185                 return 0;
 186         }
 187
 188         if (!strcmp("http.noepsv", var)) {
 189                 curl_ftp_no_epsv = git_config_bool(var, value);
 190                 return 0;
 191         }
 192         if (!strcmp("http.proxy", var))
 193                 return git_config_string(&curl_http_proxy, var, value);
 194
 195         if (!strcmp("http.cookiefile", var))
 196                 return git_config_string(&curl_cookie_file, var, value);
 197
 198         if (!strcmp("http.postbuffer", var)) {
 199                 http_post_buffer = git_config_int(var, value);
 200                 if (http_post_buffer < LARGE_PACKET_MAX)
 201                         http_post_buffer = LARGE_PACKET_MAX;
 202                 return 0;
 203         }
 204
 205         if (!strcmp("http.useragent", var))
 206                 return git_config_string(&user_agent, var, value);
 207
 208         /* Fall back on the default ones */
 209         return git_default_config(var, value, cb);
 210 }
 211
 212 static void init_curl_http_auth(CURL *result)
 213 {
 214         if (!http_auth.username)
 215                 return;
 216
 217         credential_fill(&http_auth);
 218
 219 #if LIBCURL_VERSION_NUM >= 0x071301
 220         curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
 221         curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
 222 #else
 223         {
 224                 static struct strbuf up = STRBUF_INIT;
 225                 strbuf_reset(&up);
 226                 strbuf_addf(&up, "%s:%s",
 227                             http_auth.username, http_auth.password);
 228                 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
 229         }
 230 #endif
 231 }
 232
 233 static int has_cert_password(void)
 234 {
 235         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 236                 return 0;
 237         if (!cert_auth.password) {
 238                 cert_auth.protocol = xstrdup("cert");
 239                 cert_auth.path = xstrdup(ssl_cert);
 240                 credential_fill(&cert_auth);
 241         }
 242         return 1;
 243 }
 244
 245 static CURL *get_curl_handle(void)
 246 {
 247         CURL *result = curl_easy_init();
 248
 249         if (!curl_ssl_verify) {
 250                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 251                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 252         } else {
 253                 /* Verify authenticity of the peer's certificate */
 254                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 255                 /* The name in the cert must match whom we tried to connect */
 256                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 257         }
 258
 259 #if LIBCURL_VERSION_NUM >= 0x070907
 260         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 261 #endif
 262 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 263         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 264 #endif
 265
 266         if (http_proactive_auth)
 267                 init_curl_http_auth(result);
 268
 269         if (ssl_cert != NULL)
 270                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 271         if (has_cert_password())
 272                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 273 #if LIBCURL_VERSION_NUM >= 0x070903
 274         if (ssl_key != NULL)
 275                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 276 #endif
 277 #if LIBCURL_VERSION_NUM >= 0x070908
 278         if (ssl_capath != NULL)
 279                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 280 #endif
 281         if (ssl_cainfo != NULL)
 282                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 283         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 284
 285         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 286                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 287                                  curl_low_speed_limit);
 288                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 289                                  curl_low_speed_time);
 290         }
 291
 292         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 293 #if LIBCURL_VERSION_NUM >= 0x071301
 294         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 295 #elif LIBCURL_VERSION_NUM >= 0x071101
 296         curl_easy_setopt(result, CURLOPT_POST301, 1);
 297 #endif
 298
 299         if (getenv("GIT_CURL_VERBOSE"))
 300                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 301
 302         curl_easy_setopt(result, CURLOPT_USERAGENT,
 303                 user_agent ? user_agent : git_user_agent());
 304
 305         if (curl_ftp_no_epsv)
 306                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 307
 308         if (curl_http_proxy) {
 309                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 310                 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 311         }
 312
 313         return result;
 314 }
 315
 316 static void set_from_env(const char **var, const char *envname)
 317 {
 318         const char *val = getenv(envname);
 319         if (val)
 320                 *var = val;
 321 }
 322
 323 void http_init(struct remote *remote, const char *url, int proactive_auth)
 324 {
 325         char *low_speed_limit;
 326         char *low_speed_time;
 327
 328         http_is_verbose = 0;
 329
 330         git_config(http_options, NULL);
 331
 332         curl_global_init(CURL_GLOBAL_ALL);
 333
 334         http_proactive_auth = proactive_auth;
 335
 336         if (remote && remote->http_proxy)
 337                 curl_http_proxy = xstrdup(remote->http_proxy);
 338
 339         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 340         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 341
 342 #ifdef USE_CURL_MULTI
 343         {
 344                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 345                 if (http_max_requests != NULL)
 346                         max_requests = atoi(http_max_requests);
 347         }
 348
 349         curlm = curl_multi_init();
 350         if (curlm == NULL) {
 351                 fprintf(stderr, "Error creating curl multi handle.\n");
 352                 exit(1);
 353         }
 354 #endif
 355
 356         if (getenv("GIT_SSL_NO_VERIFY"))
 357                 curl_ssl_verify = 0;
 358
 359         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 360 #if LIBCURL_VERSION_NUM >= 0x070903
 361         set_from_env(&ssl_key, "GIT_SSL_KEY");
 362 #endif
 363 #if LIBCURL_VERSION_NUM >= 0x070908
 364         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 365 #endif
 366         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 367
 368         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 369
 370         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 371         if (low_speed_limit != NULL)
 372                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 373         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 374         if (low_speed_time != NULL)
 375                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 376
 377         if (curl_ssl_verify == -1)
 378                 curl_ssl_verify = 1;
 379
 380         curl_session_count = 0;
 381 #ifdef USE_CURL_MULTI
 382         if (max_requests < 1)
 383                 max_requests = DEFAULT_MAX_REQUESTS;
 384 #endif
 385
 386         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 387                 curl_ftp_no_epsv = 1;
 388
 389         if (url) {
 390                 credential_from_url(&http_auth, url);
 391                 if (!ssl_cert_password_required &&
 392                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 393                     !prefixcmp(url, "https://"))
 394                         ssl_cert_password_required = 1;
 395         }
 396
 397 #ifndef NO_CURL_EASY_DUPHANDLE
 398         curl_default = get_curl_handle();
 399 #endif
 400 }
 401
 402 void http_cleanup(void)
 403 {
 404         struct active_request_slot *slot = active_queue_head;
 405
 406         while (slot != NULL) {
 407                 struct active_request_slot *next = slot->next;
 408                 if (slot->curl != NULL) {
 409 #ifdef USE_CURL_MULTI
 410                         curl_multi_remove_handle(curlm, slot->curl);
 411 #endif
 412                         curl_easy_cleanup(slot->curl);
 413                 }
 414                 free(slot);
 415                 slot = next;
 416         }
 417         active_queue_head = NULL;
 418
 419 #ifndef NO_CURL_EASY_DUPHANDLE
 420         curl_easy_cleanup(curl_default);
 421 #endif
 422
 423 #ifdef USE_CURL_MULTI
 424         curl_multi_cleanup(curlm);
 425 #endif
 426         curl_global_cleanup();
 427
 428         curl_slist_free_all(pragma_header);
 429         pragma_header = NULL;
 430
 431         curl_slist_free_all(no_pragma_header);
 432         no_pragma_header = NULL;
 433
 434         if (curl_http_proxy) {
 435                 free((void *)curl_http_proxy);
 436                 curl_http_proxy = NULL;
 437         }
 438
 439         if (cert_auth.password != NULL) {
 440                 memset(cert_auth.password, 0, strlen(cert_auth.password));
 441                 free(cert_auth.password);
 442                 cert_auth.password = NULL;
 443         }
 444         ssl_cert_password_required = 0;
 445 }
 446
 447 struct active_request_slot *get_active_slot(void)
 448 {
 449         struct active_request_slot *slot = active_queue_head;
 450         struct active_request_slot *newslot;
 451
 452 #ifdef USE_CURL_MULTI
 453         int num_transfers;
 454
 455         /* Wait for a slot to open up if the queue is full */
 456         while (active_requests >= max_requests) {
 457                 curl_multi_perform(curlm, &num_transfers);
 458                 if (num_transfers < active_requests)
 459                         process_curl_messages();
 460         }
 461 #endif
 462
 463         while (slot != NULL && slot->in_use)
 464                 slot = slot->next;
 465
 466         if (slot == NULL) {
 467                 newslot = xmalloc(sizeof(*newslot));
 468                 newslot->curl = NULL;
 469                 newslot->in_use = 0;
 470                 newslot->next = NULL;
 471
 472                 slot = active_queue_head;
 473                 if (slot == NULL) {
 474                         active_queue_head = newslot;
 475                 } else {
 476                         while (slot->next != NULL)
 477                                 slot = slot->next;
 478                         slot->next = newslot;
 479                 }
 480                 slot = newslot;
 481         }
 482
 483         if (slot->curl == NULL) {
 484 #ifdef NO_CURL_EASY_DUPHANDLE
 485                 slot->curl = get_curl_handle();
 486 #else
 487                 slot->curl = curl_easy_duphandle(curl_default);
 488 #endif
 489                 curl_session_count++;
 490         }
 491
 492         active_requests++;
 493         slot->in_use = 1;
 494         slot->results = NULL;
 495         slot->finished = NULL;
 496         slot->callback_data = NULL;
 497         slot->callback_func = NULL;
 498         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 499         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 500         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 501         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 502         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 503         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 504         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 505         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 506         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 507         if (http_auth.password)
 508                 init_curl_http_auth(slot->curl);
 509
 510         return slot;
 511 }
 512
 513 int start_active_slot(struct active_request_slot *slot)
 514 {
 515 #ifdef USE_CURL_MULTI
 516         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 517         int num_transfers;
 518
 519         if (curlm_result != CURLM_OK &&
 520             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 521                 active_requests--;
 522                 slot->in_use = 0;
 523                 return 0;
 524         }
 525
 526         /*
 527          * We know there must be something to do, since we just added
 528          * something.
 529          */
 530         curl_multi_perform(curlm, &num_transfers);
 531 #endif
 532         return 1;
 533 }
 534
 535 #ifdef USE_CURL_MULTI
 536 struct fill_chain {
 537         void *data;
 538         int (*fill)(void *);
 539         struct fill_chain *next;
 540 };
 541
 542 static struct fill_chain *fill_cfg;
 543
 544 void add_fill_function(void *data, int (*fill)(void *))
 545 {
 546         struct fill_chain *new = xmalloc(sizeof(*new));
 547         struct fill_chain **linkp = &fill_cfg;
 548         new->data = data;
 549         new->fill = fill;
 550         new->next = NULL;
 551         while (*linkp)
 552                 linkp = &(*linkp)->next;
 553         *linkp = new;
 554 }
 555
 556 void fill_active_slots(void)
 557 {
 558         struct active_request_slot *slot = active_queue_head;
 559
 560         while (active_requests < max_requests) {
 561                 struct fill_chain *fill;
 562                 for (fill = fill_cfg; fill; fill = fill->next)
 563                         if (fill->fill(fill->data))
 564                                 break;
 565
 566                 if (!fill)
 567                         break;
 568         }
 569
 570         while (slot != NULL) {
 571                 if (!slot->in_use && slot->curl != NULL
 572                         && curl_session_count > min_curl_sessions) {
 573                         curl_easy_cleanup(slot->curl);
 574                         slot->curl = NULL;
 575                         curl_session_count--;
 576                 }
 577                 slot = slot->next;
 578         }
 579 }
 580
 581 void step_active_slots(void)
 582 {
 583         int num_transfers;
 584         CURLMcode curlm_result;
 585
 586         do {
 587                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 588         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 589         if (num_transfers < active_requests) {
 590                 process_curl_messages();
 591                 fill_active_slots();
 592         }
 593 }
 594 #endif
 595
 596 void run_active_slot(struct active_request_slot *slot)
 597 {
 598 #ifdef USE_CURL_MULTI
 599         fd_set readfds;
 600         fd_set writefds;
 601         fd_set excfds;
 602         int max_fd;
 603         struct timeval select_timeout;
 604         int finished = 0;
 605
 606         slot->finished = &finished;
 607         while (!finished) {
 608                 step_active_slots();
 609
 610                 if (slot->in_use) {
 611 #if LIBCURL_VERSION_NUM >= 0x070f04
 612                         long curl_timeout;
 613                         curl_multi_timeout(curlm, &curl_timeout);
 614                         if (curl_timeout == 0) {
 615                                 continue;
 616                         } else if (curl_timeout == -1) {
 617                                 select_timeout.tv_sec  = 0;
 618                                 select_timeout.tv_usec = 50000;
 619                         } else {
 620                                 select_timeout.tv_sec  =  curl_timeout / 1000;
 621                                 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 622                         }
 623 #else
 624                         select_timeout.tv_sec  = 0;
 625                         select_timeout.tv_usec = 50000;
 626 #endif
 627
 628                         max_fd = -1;
 629                         FD_ZERO(&readfds);
 630                         FD_ZERO(&writefds);
 631                         FD_ZERO(&excfds);
 632                         curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 633
 634                         select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 635                 }
 636         }
 637 #else
 638         while (slot->in_use) {
 639                 slot->curl_result = curl_easy_perform(slot->curl);
 640                 finish_active_slot(slot);
 641         }
 642 #endif
 643 }
 644
 645 static void closedown_active_slot(struct active_request_slot *slot)
 646 {
 647         active_requests--;
 648         slot->in_use = 0;
 649 }
 650
 651 static void release_active_slot(struct active_request_slot *slot)
 652 {
 653         closedown_active_slot(slot);
 654         if (slot->curl && curl_session_count > min_curl_sessions) {
 655 #ifdef USE_CURL_MULTI
 656                 curl_multi_remove_handle(curlm, slot->curl);
 657 #endif
 658                 curl_easy_cleanup(slot->curl);
 659                 slot->curl = NULL;
 660                 curl_session_count--;
 661         }
 662 #ifdef USE_CURL_MULTI
 663         fill_active_slots();
 664 #endif
 665 }
 666
 667 void finish_active_slot(struct active_request_slot *slot)
 668 {
 669         closedown_active_slot(slot);
 670         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 671
 672         if (slot->finished != NULL)
 673                 (*slot->finished) = 1;
 674
 675         /* Store slot results so they can be read after the slot is reused */
 676         if (slot->results != NULL) {
 677                 slot->results->curl_result = slot->curl_result;
 678                 slot->results->http_code = slot->http_code;
 679         }
 680
 681         /* Run callback if appropriate */
 682         if (slot->callback_func != NULL)
 683                 slot->callback_func(slot->callback_data);
 684 }
 685
 686 void finish_all_active_slots(void)
 687 {
 688         struct active_request_slot *slot = active_queue_head;
 689
 690         while (slot != NULL)
 691                 if (slot->in_use) {
 692                         run_active_slot(slot);
 693                         slot = active_queue_head;
 694                 } else {
 695                         slot = slot->next;
 696                 }
 697 }
 698
 699 /* Helpers for modifying and creating URLs */
 700 static inline int needs_quote(int ch)
 701 {
 702         if (((ch >= 'A') && (ch <= 'Z'))
 703                         || ((ch >= 'a') && (ch <= 'z'))
 704                         || ((ch >= '0') && (ch <= '9'))
 705                         || (ch == '/')
 706                         || (ch == '-')
 707                         || (ch == '.'))
 708                 return 0;
 709         return 1;
 710 }
 711
 712 static char *quote_ref_url(const char *base, const char *ref)
 713 {
 714         struct strbuf buf = STRBUF_INIT;
 715         const char *cp;
 716         int ch;
 717
 718         end_url_with_slash(&buf, base);
 719
 720         for (cp = ref; (ch = *cp) != 0; cp++)
 721                 if (needs_quote(ch))
 722                         strbuf_addf(&buf, "%%%02x", ch);
 723                 else
 724                         strbuf_addch(&buf, *cp);
 725
 726         return strbuf_detach(&buf, NULL);
 727 }
 728
 729 void append_remote_object_url(struct strbuf *buf, const char *url,
 730                               const char *hex,
 731                               int only_two_digit_prefix)
 732 {
 733         end_url_with_slash(buf, url);
 734
 735         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 736         if (!only_two_digit_prefix)
 737                 strbuf_addf(buf, "%s", hex+2);
 738 }
 739
 740 char *get_remote_object_url(const char *url, const char *hex,
 741                             int only_two_digit_prefix)
 742 {
 743         struct strbuf buf = STRBUF_INIT;
 744         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 745         return strbuf_detach(&buf, NULL);
 746 }
 747
 748 /* http_request() targets */
 749 #define HTTP_REQUEST_STRBUF     0
 750 #define HTTP_REQUEST_FILE       1
 751
 752 static int http_request(const char *url, void *result, int target, int options)
 753 {
 754         struct active_request_slot *slot;
 755         struct slot_results results;
 756         struct curl_slist *headers = NULL;
 757         struct strbuf buf = STRBUF_INIT;
 758         int ret;
 759
 760         slot = get_active_slot();
 761         slot->results = &results;
 762         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 763
 764         if (result == NULL) {
 765                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 766         } else {
 767                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 768                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 769
 770                 if (target == HTTP_REQUEST_FILE) {
 771                         long posn = ftell(result);
 772                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 773                                          fwrite);
 774                         if (posn > 0) {
 775                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 776                                 headers = curl_slist_append(headers, buf.buf);
 777                                 strbuf_reset(&buf);
 778                         }
 779                 } else
 780                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 781                                          fwrite_buffer);
 782         }
 783
 784         strbuf_addstr(&buf, "Pragma:");
 785         if (options & HTTP_NO_CACHE)
 786                 strbuf_addstr(&buf, " no-cache");
 787
 788         headers = curl_slist_append(headers, buf.buf);
 789
 790         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 791         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 792
 793         if (start_active_slot(slot)) {
 794                 run_active_slot(slot);
 795                 if (results.curl_result == CURLE_OK)
 796                         ret = HTTP_OK;
 797                 else if (missing_target(&results))
 798                         ret = HTTP_MISSING_TARGET;
 799                 else if (results.http_code == 401) {
 800                         if (http_auth.username && http_auth.password) {
 801                                 credential_reject(&http_auth);
 802                                 ret = HTTP_NOAUTH;
 803                         } else {
 804                                 credential_fill(&http_auth);
 805                                 init_curl_http_auth(slot->curl);
 806                                 ret = HTTP_REAUTH;
 807                         }
 808                 } else {
 809 #if LIBCURL_VERSION_NUM >= 0x070c00
 810                         if (!curl_errorstr[0])
 811                                 strlcpy(curl_errorstr,
 812                                         curl_easy_strerror(results.curl_result),
 813                                         sizeof(curl_errorstr));
 814 #endif
 815                         ret = HTTP_ERROR;
 816                 }
 817         } else {
 818                 error("Unable to start HTTP request for %s", url);
 819                 ret = HTTP_START_FAILED;
 820         }
 821
 822         curl_slist_free_all(headers);
 823         strbuf_release(&buf);
 824
 825         if (ret == HTTP_OK)
 826                 credential_approve(&http_auth);
 827
 828         return ret;
 829 }
 830
 831 static int http_request_reauth(const char *url, void *result, int target,
 832                                int options)
 833 {
 834         int ret = http_request(url, result, target, options);
 835         if (ret != HTTP_REAUTH)
 836                 return ret;
 837         return http_request(url, result, target, options);
 838 }
 839
 840 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 841 {
 842         return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 843 }
 844
 845 /*
 846  * Downloads a URL and stores the result in the given file.
 847  *
 848  * If a previous interrupted download is detected (i.e. a previous temporary
 849  * file is still around) the download is resumed.
 850  */
 851 static int http_get_file(const char *url, const char *filename, int options)
 852 {
 853         int ret;
 854         struct strbuf tmpfile = STRBUF_INIT;
 855         FILE *result;
 856
 857         strbuf_addf(&tmpfile, "%s.temp", filename);
 858         result = fopen(tmpfile.buf, "a");
 859         if (! result) {
 860                 error("Unable to open local file %s", tmpfile.buf);
 861                 ret = HTTP_ERROR;
 862                 goto cleanup;
 863         }
 864
 865         ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 866         fclose(result);
 867
 868         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 869                 ret = HTTP_ERROR;
 870 cleanup:
 871         strbuf_release(&tmpfile);
 872         return ret;
 873 }
 874
 875 int http_error(const char *url, int ret)
 876 {
 877         /* http_request has already handled HTTP_START_FAILED. */
 878         if (ret != HTTP_START_FAILED)
 879                 error("%s while accessing %s", curl_errorstr, url);
 880
 881         return ret;
 882 }
 883
 884 int http_fetch_ref(const char *base, struct ref *ref)
 885 {
 886         char *url;
 887         struct strbuf buffer = STRBUF_INIT;
 888         int ret = -1;
 889
 890         url = quote_ref_url(base, ref->name);
 891         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 892                 strbuf_rtrim(&buffer);
 893                 if (buffer.len == 40)
 894                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 895                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 896                         ref->symref = xstrdup(buffer.buf + 5);
 897                         ret = 0;
 898                 }
 899         }
 900
 901         strbuf_release(&buffer);
 902         free(url);
 903         return ret;
 904 }
 905
 906 /* Helpers for fetching packs */
 907 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 908 {
 909         char *url, *tmp;
 910         struct strbuf buf = STRBUF_INIT;
 911
 912         if (http_is_verbose)
 913                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 914
 915         end_url_with_slash(&buf, base_url);
 916         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 917         url = strbuf_detach(&buf, NULL);
 918
 919         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 920         tmp = strbuf_detach(&buf, NULL);
 921
 922         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 923                 error("Unable to get pack index %s", url);
 924                 free(tmp);
 925                 tmp = NULL;
 926         }
 927
 928         free(url);
 929         return tmp;
 930 }
 931
 932 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 933         unsigned char *sha1, const char *base_url)
 934 {
 935         struct packed_git *new_pack;
 936         char *tmp_idx = NULL;
 937         int ret;
 938
 939         if (has_pack_index(sha1)) {
 940                 new_pack = parse_pack_index(sha1, NULL);
 941                 if (!new_pack)
 942                         return -1; /* parse_pack_index() already issued error message */
 943                 goto add_pack;
 944         }
 945
 946         tmp_idx = fetch_pack_index(sha1, base_url);
 947         if (!tmp_idx)
 948                 return -1;
 949
 950         new_pack = parse_pack_index(sha1, tmp_idx);
 951         if (!new_pack) {
 952                 unlink(tmp_idx);
 953                 free(tmp_idx);
 954
 955                 return -1; /* parse_pack_index() already issued error message */
 956         }
 957
 958         ret = verify_pack_index(new_pack);
 959         if (!ret) {
 960                 close_pack_index(new_pack);
 961                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 962         }
 963         free(tmp_idx);
 964         if (ret)
 965                 return -1;
 966
 967 add_pack:
 968         new_pack->next = *packs_head;
 969         *packs_head = new_pack;
 970         return 0;
 971 }
 972
 973 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
 974 {
 975         int ret = 0, i = 0;
 976         char *url, *data;
 977         struct strbuf buf = STRBUF_INIT;
 978         unsigned char sha1[20];
 979
 980         end_url_with_slash(&buf, base_url);
 981         strbuf_addstr(&buf, "objects/info/packs");
 982         url = strbuf_detach(&buf, NULL);
 983
 984         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
 985         if (ret != HTTP_OK)
 986                 goto cleanup;
 987
 988         data = buf.buf;
 989         while (i < buf.len) {
 990                 switch (data[i]) {
 991                 case 'P':
 992                         i++;
 993                         if (i + 52 <= buf.len &&
 994                             !prefixcmp(data + i, " pack-") &&
 995                             !prefixcmp(data + i + 46, ".pack\n")) {
 996                                 get_sha1_hex(data + i + 6, sha1);
 997                                 fetch_and_setup_pack_index(packs_head, sha1,
 998                                                       base_url);
 999                                 i += 51;
1000                                 break;
1001                         }
1002                 default:
1003                         while (i < buf.len && data[i] != '\n')
1004                                 i++;
1005                 }
1006                 i++;
1007         }
1008
1009 cleanup:
1010         free(url);
1011         return ret;
1012 }
1013
1014 void release_http_pack_request(struct http_pack_request *preq)
1015 {
1016         if (preq->packfile != NULL) {
1017                 fclose(preq->packfile);
1018                 preq->packfile = NULL;
1019         }
1020         if (preq->range_header != NULL) {
1021                 curl_slist_free_all(preq->range_header);
1022                 preq->range_header = NULL;
1023         }
1024         preq->slot = NULL;
1025         free(preq->url);
1026 }
1027
1028 int finish_http_pack_request(struct http_pack_request *preq)
1029 {
1030         struct packed_git **lst;
1031         struct packed_git *p = preq->target;
1032         char *tmp_idx;
1033         struct child_process ip;
1034         const char *ip_argv[8];
1035
1036         close_pack_index(p);
1037
1038         fclose(preq->packfile);
1039         preq->packfile = NULL;
1040
1041         lst = preq->lst;
1042         while (*lst != p)
1043                 lst = &((*lst)->next);
1044         *lst = (*lst)->next;
1045
1046         tmp_idx = xstrdup(preq->tmpfile);
1047         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1048                ".idx.temp");
1049
1050         ip_argv[0] = "index-pack";
1051         ip_argv[1] = "-o";
1052         ip_argv[2] = tmp_idx;
1053         ip_argv[3] = preq->tmpfile;
1054         ip_argv[4] = NULL;
1055
1056         memset(&ip, 0, sizeof(ip));
1057         ip.argv = ip_argv;
1058         ip.git_cmd = 1;
1059         ip.no_stdin = 1;
1060         ip.no_stdout = 1;
1061
1062         if (run_command(&ip)) {
1063                 unlink(preq->tmpfile);
1064                 unlink(tmp_idx);
1065                 free(tmp_idx);
1066                 return -1;
1067         }
1068
1069         unlink(sha1_pack_index_name(p->sha1));
1070
1071         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1072          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1073                 free(tmp_idx);
1074                 return -1;
1075         }
1076
1077         install_packed_git(p);
1078         free(tmp_idx);
1079         return 0;
1080 }
1081
1082 struct http_pack_request *new_http_pack_request(
1083         struct packed_git *target, const char *base_url)
1084 {
1085         long prev_posn = 0;
1086         char range[RANGE_HEADER_SIZE];
1087         struct strbuf buf = STRBUF_INIT;
1088         struct http_pack_request *preq;
1089
1090         preq = xcalloc(1, sizeof(*preq));
1091         preq->target = target;
1092
1093         end_url_with_slash(&buf, base_url);
1094         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1095                 sha1_to_hex(target->sha1));
1096         preq->url = strbuf_detach(&buf, NULL);
1097
1098         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1099                 sha1_pack_name(target->sha1));
1100         preq->packfile = fopen(preq->tmpfile, "a");
1101         if (!preq->packfile) {
1102                 error("Unable to open local file %s for pack",
1103                       preq->tmpfile);
1104                 goto abort;
1105         }
1106
1107         preq->slot = get_active_slot();
1108         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1109         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1110         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1111         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1112                 no_pragma_header);
1113
1114         /*
1115          * If there is data present from a previous transfer attempt,
1116          * resume where it left off
1117          */
1118         prev_posn = ftell(preq->packfile);
1119         if (prev_posn>0) {
1120                 if (http_is_verbose)
1121                         fprintf(stderr,
1122                                 "Resuming fetch of pack %s at byte %ld\n",
1123                                 sha1_to_hex(target->sha1), prev_posn);
1124                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1125                 preq->range_header = curl_slist_append(NULL, range);
1126                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1127                         preq->range_header);
1128         }
1129
1130         return preq;
1131
1132 abort:
1133         free(preq->url);
1134         free(preq);
1135         return NULL;
1136 }
1137
1138 /* Helpers for fetching objects (loose) */
1139 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1140                                void *data)
1141 {
1142         unsigned char expn[4096];
1143         size_t size = eltsize * nmemb;
1144         int posn = 0;
1145         struct http_object_request *freq =
1146                 (struct http_object_request *)data;
1147         do {
1148                 ssize_t retval = xwrite(freq->localfile,
1149                                         (char *) ptr + posn, size - posn);
1150                 if (retval < 0)
1151                         return posn;
1152                 posn += retval;
1153         } while (posn < size);
1154
1155         freq->stream.avail_in = size;
1156         freq->stream.next_in = (void *)ptr;
1157         do {
1158                 freq->stream.next_out = expn;
1159                 freq->stream.avail_out = sizeof(expn);
1160                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1161                 git_SHA1_Update(&freq->c, expn,
1162                                 sizeof(expn) - freq->stream.avail_out);
1163         } while (freq->stream.avail_in && freq->zret == Z_OK);
1164         return size;
1165 }
1166
1167 struct http_object_request *new_http_object_request(const char *base_url,
1168         unsigned char *sha1)
1169 {
1170         char *hex = sha1_to_hex(sha1);
1171         char *filename;
1172         char prevfile[PATH_MAX];
1173         int prevlocal;
1174         char prev_buf[PREV_BUF_SIZE];
1175         ssize_t prev_read = 0;
1176         long prev_posn = 0;
1177         char range[RANGE_HEADER_SIZE];
1178         struct curl_slist *range_header = NULL;
1179         struct http_object_request *freq;
1180
1181         freq = xcalloc(1, sizeof(*freq));
1182         hashcpy(freq->sha1, sha1);
1183         freq->localfile = -1;
1184
1185         filename = sha1_file_name(sha1);
1186         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1187                  "%s.temp", filename);
1188
1189         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1190         unlink_or_warn(prevfile);
1191         rename(freq->tmpfile, prevfile);
1192         unlink_or_warn(freq->tmpfile);
1193
1194         if (freq->localfile != -1)
1195                 error("fd leakage in start: %d", freq->localfile);
1196         freq->localfile = open(freq->tmpfile,
1197                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1198         /*
1199          * This could have failed due to the "lazy directory creation";
1200          * try to mkdir the last path component.
1201          */
1202         if (freq->localfile < 0 && errno == ENOENT) {
1203                 char *dir = strrchr(freq->tmpfile, '/');
1204                 if (dir) {
1205                         *dir = 0;
1206                         mkdir(freq->tmpfile, 0777);
1207                         *dir = '/';
1208                 }
1209                 freq->localfile = open(freq->tmpfile,
1210                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1211         }
1212
1213         if (freq->localfile < 0) {
1214                 error("Couldn't create temporary file %s: %s",
1215                       freq->tmpfile, strerror(errno));
1216                 goto abort;
1217         }
1218
1219         git_inflate_init(&freq->stream);
1220
1221         git_SHA1_Init(&freq->c);
1222
1223         freq->url = get_remote_object_url(base_url, hex, 0);
1224
1225         /*
1226          * If a previous temp file is present, process what was already
1227          * fetched.
1228          */
1229         prevlocal = open(prevfile, O_RDONLY);
1230         if (prevlocal != -1) {
1231                 do {
1232                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1233                         if (prev_read>0) {
1234                                 if (fwrite_sha1_file(prev_buf,
1235                                                      1,
1236                                                      prev_read,
1237                                                      freq) == prev_read) {
1238                                         prev_posn += prev_read;
1239                                 } else {
1240                                         prev_read = -1;
1241                                 }
1242                         }
1243                 } while (prev_read > 0);
1244                 close(prevlocal);
1245         }
1246         unlink_or_warn(prevfile);
1247
1248         /*
1249          * Reset inflate/SHA1 if there was an error reading the previous temp
1250          * file; also rewind to the beginning of the local file.
1251          */
1252         if (prev_read == -1) {
1253                 memset(&freq->stream, 0, sizeof(freq->stream));
1254                 git_inflate_init(&freq->stream);
1255                 git_SHA1_Init(&freq->c);
1256                 if (prev_posn>0) {
1257                         prev_posn = 0;
1258                         lseek(freq->localfile, 0, SEEK_SET);
1259                         if (ftruncate(freq->localfile, 0) < 0) {
1260                                 error("Couldn't truncate temporary file %s: %s",
1261                                           freq->tmpfile, strerror(errno));
1262                                 goto abort;
1263                         }
1264                 }
1265         }
1266
1267         freq->slot = get_active_slot();
1268
1269         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1270         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1271         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1272         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1273         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1274
1275         /*
1276          * If we have successfully processed data from a previous fetch
1277          * attempt, only fetch the data we don't already have.
1278          */
1279         if (prev_posn>0) {
1280                 if (http_is_verbose)
1281                         fprintf(stderr,
1282                                 "Resuming fetch of object %s at byte %ld\n",
1283                                 hex, prev_posn);
1284                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1285                 range_header = curl_slist_append(range_header, range);
1286                 curl_easy_setopt(freq->slot->curl,
1287                                  CURLOPT_HTTPHEADER, range_header);
1288         }
1289
1290         return freq;
1291
1292 abort:
1293         free(freq->url);
1294         free(freq);
1295         return NULL;
1296 }
1297
1298 void process_http_object_request(struct http_object_request *freq)
1299 {
1300         if (freq->slot == NULL)
1301                 return;
1302         freq->curl_result = freq->slot->curl_result;
1303         freq->http_code = freq->slot->http_code;
1304         freq->slot = NULL;
1305 }
1306
1307 int finish_http_object_request(struct http_object_request *freq)
1308 {
1309         struct stat st;
1310
1311         close(freq->localfile);
1312         freq->localfile = -1;
1313
1314         process_http_object_request(freq);
1315
1316         if (freq->http_code == 416) {
1317                 warning("requested range invalid; we may already have all the data.");
1318         } else if (freq->curl_result != CURLE_OK) {
1319                 if (stat(freq->tmpfile, &st) == 0)
1320                         if (st.st_size == 0)
1321                                 unlink_or_warn(freq->tmpfile);
1322                 return -1;
1323         }
1324
1325         git_inflate_end(&freq->stream);
1326         git_SHA1_Final(freq->real_sha1, &freq->c);
1327         if (freq->zret != Z_STREAM_END) {
1328                 unlink_or_warn(freq->tmpfile);
1329                 return -1;
1330         }
1331         if (hashcmp(freq->sha1, freq->real_sha1)) {
1332                 unlink_or_warn(freq->tmpfile);
1333                 return -1;
1334         }
1335         freq->rename =
1336                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1337
1338         return freq->rename;
1339 }
1340
1341 void abort_http_object_request(struct http_object_request *freq)
1342 {
1343         unlink_or_warn(freq->tmpfile);
1344
1345         release_http_object_request(freq);
1346 }
1347
1348 void release_http_object_request(struct http_object_request *freq)
1349 {
1350         if (freq->localfile != -1) {
1351                 close(freq->localfile);
1352                 freq->localfile = -1;
1353         }
1354         if (freq->url != NULL) {
1355                 free(freq->url);
1356                 freq->url = NULL;
1357         }
1358         if (freq->slot != NULL) {
1359                 freq->slot->callback_func = NULL;
1360                 freq->slot->callback_data = NULL;
1361                 release_active_slot(freq->slot);
1362                 freq->slot = NULL;
1363         }
1364 }