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

   1 #include "http.h"
   2 #include "pack.h"
   3 #include "sideband.h"
   4 #include "run-command.h"
   5 #include "url.h"
   6 #include "credential.h"
   7 #include "version.h"
   8
   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                 /*
 226                  * Note that we assume we only ever have a single set of
 227                  * credentials in a given program run, so we do not have
 228                  * to worry about updating this buffer, only setting its
 229                  * initial value.
 230                  */
 231                 if (!up.len)
 232                         strbuf_addf(&up, "%s:%s",
 233                                 http_auth.username, http_auth.password);
 234                 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
 235         }
 236 #endif
 237 }
 238
 239 static int has_cert_password(void)
 240 {
 241         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 242                 return 0;
 243         if (!cert_auth.password) {
 244                 cert_auth.protocol = xstrdup("cert");
 245                 cert_auth.username = xstrdup("");
 246                 cert_auth.path = xstrdup(ssl_cert);
 247                 credential_fill(&cert_auth);
 248         }
 249         return 1;
 250 }
 251
 252 static CURL *get_curl_handle(void)
 253 {
 254         CURL *result = curl_easy_init();
 255
 256         if (!curl_ssl_verify) {
 257                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 258                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 259         } else {
 260                 /* Verify authenticity of the peer's certificate */
 261                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 262                 /* The name in the cert must match whom we tried to connect */
 263                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 264         }
 265
 266 #if LIBCURL_VERSION_NUM >= 0x070907
 267         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 268 #endif
 269 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 270         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 271 #endif
 272
 273         if (http_proactive_auth)
 274                 init_curl_http_auth(result);
 275
 276         if (ssl_cert != NULL)
 277                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 278         if (has_cert_password())
 279                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 280 #if LIBCURL_VERSION_NUM >= 0x070903
 281         if (ssl_key != NULL)
 282                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 283 #endif
 284 #if LIBCURL_VERSION_NUM >= 0x070908
 285         if (ssl_capath != NULL)
 286                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 287 #endif
 288         if (ssl_cainfo != NULL)
 289                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 290         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 291
 292         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 293                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 294                                  curl_low_speed_limit);
 295                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 296                                  curl_low_speed_time);
 297         }
 298
 299         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 300 #if LIBCURL_VERSION_NUM >= 0x071301
 301         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 302 #elif LIBCURL_VERSION_NUM >= 0x071101
 303         curl_easy_setopt(result, CURLOPT_POST301, 1);
 304 #endif
 305
 306         if (getenv("GIT_CURL_VERBOSE"))
 307                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 308
 309         curl_easy_setopt(result, CURLOPT_USERAGENT,
 310                 user_agent ? user_agent : git_user_agent());
 311
 312         if (curl_ftp_no_epsv)
 313                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 314
 315         if (curl_http_proxy) {
 316                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 317                 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 318         }
 319
 320         return result;
 321 }
 322
 323 static void set_from_env(const char **var, const char *envname)
 324 {
 325         const char *val = getenv(envname);
 326         if (val)
 327                 *var = val;
 328 }
 329
 330 void http_init(struct remote *remote, const char *url, int proactive_auth)
 331 {
 332         char *low_speed_limit;
 333         char *low_speed_time;
 334
 335         http_is_verbose = 0;
 336
 337         git_config(http_options, NULL);
 338
 339         curl_global_init(CURL_GLOBAL_ALL);
 340
 341         http_proactive_auth = proactive_auth;
 342
 343         if (remote && remote->http_proxy)
 344                 curl_http_proxy = xstrdup(remote->http_proxy);
 345
 346         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 347         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 348
 349 #ifdef USE_CURL_MULTI
 350         {
 351                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 352                 if (http_max_requests != NULL)
 353                         max_requests = atoi(http_max_requests);
 354         }
 355
 356         curlm = curl_multi_init();
 357         if (curlm == NULL) {
 358                 fprintf(stderr, "Error creating curl multi handle.\n");
 359                 exit(1);
 360         }
 361 #endif
 362
 363         if (getenv("GIT_SSL_NO_VERIFY"))
 364                 curl_ssl_verify = 0;
 365
 366         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 367 #if LIBCURL_VERSION_NUM >= 0x070903
 368         set_from_env(&ssl_key, "GIT_SSL_KEY");
 369 #endif
 370 #if LIBCURL_VERSION_NUM >= 0x070908
 371         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 372 #endif
 373         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 374
 375         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 376
 377         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 378         if (low_speed_limit != NULL)
 379                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 380         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 381         if (low_speed_time != NULL)
 382                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 383
 384         if (curl_ssl_verify == -1)
 385                 curl_ssl_verify = 1;
 386
 387         curl_session_count = 0;
 388 #ifdef USE_CURL_MULTI
 389         if (max_requests < 1)
 390                 max_requests = DEFAULT_MAX_REQUESTS;
 391 #endif
 392
 393         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 394                 curl_ftp_no_epsv = 1;
 395
 396         if (url) {
 397                 credential_from_url(&http_auth, url);
 398                 if (!ssl_cert_password_required &&
 399                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 400                     !prefixcmp(url, "https://"))
 401                         ssl_cert_password_required = 1;
 402         }
 403
 404 #ifndef NO_CURL_EASY_DUPHANDLE
 405         curl_default = get_curl_handle();
 406 #endif
 407 }
 408
 409 void http_cleanup(void)
 410 {
 411         struct active_request_slot *slot = active_queue_head;
 412
 413         while (slot != NULL) {
 414                 struct active_request_slot *next = slot->next;
 415                 if (slot->curl != NULL) {
 416 #ifdef USE_CURL_MULTI
 417                         curl_multi_remove_handle(curlm, slot->curl);
 418 #endif
 419                         curl_easy_cleanup(slot->curl);
 420                 }
 421                 free(slot);
 422                 slot = next;
 423         }
 424         active_queue_head = NULL;
 425
 426 #ifndef NO_CURL_EASY_DUPHANDLE
 427         curl_easy_cleanup(curl_default);
 428 #endif
 429
 430 #ifdef USE_CURL_MULTI
 431         curl_multi_cleanup(curlm);
 432 #endif
 433         curl_global_cleanup();
 434
 435         curl_slist_free_all(pragma_header);
 436         pragma_header = NULL;
 437
 438         curl_slist_free_all(no_pragma_header);
 439         no_pragma_header = NULL;
 440
 441         if (curl_http_proxy) {
 442                 free((void *)curl_http_proxy);
 443                 curl_http_proxy = NULL;
 444         }
 445
 446         if (cert_auth.password != NULL) {
 447                 memset(cert_auth.password, 0, strlen(cert_auth.password));
 448                 free(cert_auth.password);
 449                 cert_auth.password = NULL;
 450         }
 451         ssl_cert_password_required = 0;
 452 }
 453
 454 struct active_request_slot *get_active_slot(void)
 455 {
 456         struct active_request_slot *slot = active_queue_head;
 457         struct active_request_slot *newslot;
 458
 459 #ifdef USE_CURL_MULTI
 460         int num_transfers;
 461
 462         /* Wait for a slot to open up if the queue is full */
 463         while (active_requests >= max_requests) {
 464                 curl_multi_perform(curlm, &num_transfers);
 465                 if (num_transfers < active_requests)
 466                         process_curl_messages();
 467         }
 468 #endif
 469
 470         while (slot != NULL && slot->in_use)
 471                 slot = slot->next;
 472
 473         if (slot == NULL) {
 474                 newslot = xmalloc(sizeof(*newslot));
 475                 newslot->curl = NULL;
 476                 newslot->in_use = 0;
 477                 newslot->next = NULL;
 478
 479                 slot = active_queue_head;
 480                 if (slot == NULL) {
 481                         active_queue_head = newslot;
 482                 } else {
 483                         while (slot->next != NULL)
 484                                 slot = slot->next;
 485                         slot->next = newslot;
 486                 }
 487                 slot = newslot;
 488         }
 489
 490         if (slot->curl == NULL) {
 491 #ifdef NO_CURL_EASY_DUPHANDLE
 492                 slot->curl = get_curl_handle();
 493 #else
 494                 slot->curl = curl_easy_duphandle(curl_default);
 495 #endif
 496                 curl_session_count++;
 497         }
 498
 499         active_requests++;
 500         slot->in_use = 1;
 501         slot->results = NULL;
 502         slot->finished = NULL;
 503         slot->callback_data = NULL;
 504         slot->callback_func = NULL;
 505         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 506         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 507         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 508         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 509         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 510         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 511         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 512         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 513         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 514         if (http_auth.password)
 515                 init_curl_http_auth(slot->curl);
 516
 517         return slot;
 518 }
 519
 520 int start_active_slot(struct active_request_slot *slot)
 521 {
 522 #ifdef USE_CURL_MULTI
 523         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 524         int num_transfers;
 525
 526         if (curlm_result != CURLM_OK &&
 527             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 528                 active_requests--;
 529                 slot->in_use = 0;
 530                 return 0;
 531         }
 532
 533         /*
 534          * We know there must be something to do, since we just added
 535          * something.
 536          */
 537         curl_multi_perform(curlm, &num_transfers);
 538 #endif
 539         return 1;
 540 }
 541
 542 #ifdef USE_CURL_MULTI
 543 struct fill_chain {
 544         void *data;
 545         int (*fill)(void *);
 546         struct fill_chain *next;
 547 };
 548
 549 static struct fill_chain *fill_cfg;
 550
 551 void add_fill_function(void *data, int (*fill)(void *))
 552 {
 553         struct fill_chain *new = xmalloc(sizeof(*new));
 554         struct fill_chain **linkp = &fill_cfg;
 555         new->data = data;
 556         new->fill = fill;
 557         new->next = NULL;
 558         while (*linkp)
 559                 linkp = &(*linkp)->next;
 560         *linkp = new;
 561 }
 562
 563 void fill_active_slots(void)
 564 {
 565         struct active_request_slot *slot = active_queue_head;
 566
 567         while (active_requests < max_requests) {
 568                 struct fill_chain *fill;
 569                 for (fill = fill_cfg; fill; fill = fill->next)
 570                         if (fill->fill(fill->data))
 571                                 break;
 572
 573                 if (!fill)
 574                         break;
 575         }
 576
 577         while (slot != NULL) {
 578                 if (!slot->in_use && slot->curl != NULL
 579                         && curl_session_count > min_curl_sessions) {
 580                         curl_easy_cleanup(slot->curl);
 581                         slot->curl = NULL;
 582                         curl_session_count--;
 583                 }
 584                 slot = slot->next;
 585         }
 586 }
 587
 588 void step_active_slots(void)
 589 {
 590         int num_transfers;
 591         CURLMcode curlm_result;
 592
 593         do {
 594                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 595         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 596         if (num_transfers < active_requests) {
 597                 process_curl_messages();
 598                 fill_active_slots();
 599         }
 600 }
 601 #endif
 602
 603 void run_active_slot(struct active_request_slot *slot)
 604 {
 605 #ifdef USE_CURL_MULTI
 606         fd_set readfds;
 607         fd_set writefds;
 608         fd_set excfds;
 609         int max_fd;
 610         struct timeval select_timeout;
 611         int finished = 0;
 612
 613         slot->finished = &finished;
 614         while (!finished) {
 615                 step_active_slots();
 616
 617                 if (slot->in_use) {
 618 #if LIBCURL_VERSION_NUM >= 0x070f04
 619                         long curl_timeout;
 620                         curl_multi_timeout(curlm, &curl_timeout);
 621                         if (curl_timeout == 0) {
 622                                 continue;
 623                         } else if (curl_timeout == -1) {
 624                                 select_timeout.tv_sec  = 0;
 625                                 select_timeout.tv_usec = 50000;
 626                         } else {
 627                                 select_timeout.tv_sec  =  curl_timeout / 1000;
 628                                 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 629                         }
 630 #else
 631                         select_timeout.tv_sec  = 0;
 632                         select_timeout.tv_usec = 50000;
 633 #endif
 634
 635                         max_fd = -1;
 636                         FD_ZERO(&readfds);
 637                         FD_ZERO(&writefds);
 638                         FD_ZERO(&excfds);
 639                         curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 640
 641                         /*
 642                          * It can happen that curl_multi_timeout returns a pathologically
 643                          * long timeout when curl_multi_fdset returns no file descriptors
 644                          * to read.  See commit message for more details.
 645                          */
 646                         if (max_fd < 0 &&
 647                             (select_timeout.tv_sec > 0 ||
 648                              select_timeout.tv_usec > 50000)) {
 649                                 select_timeout.tv_sec  = 0;
 650                                 select_timeout.tv_usec = 50000;
 651                         }
 652
 653                         select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 654                 }
 655         }
 656 #else
 657         while (slot->in_use) {
 658                 slot->curl_result = curl_easy_perform(slot->curl);
 659                 finish_active_slot(slot);
 660         }
 661 #endif
 662 }
 663
 664 static void closedown_active_slot(struct active_request_slot *slot)
 665 {
 666         active_requests--;
 667         slot->in_use = 0;
 668 }
 669
 670 static void release_active_slot(struct active_request_slot *slot)
 671 {
 672         closedown_active_slot(slot);
 673         if (slot->curl && curl_session_count > min_curl_sessions) {
 674 #ifdef USE_CURL_MULTI
 675                 curl_multi_remove_handle(curlm, slot->curl);
 676 #endif
 677                 curl_easy_cleanup(slot->curl);
 678                 slot->curl = NULL;
 679                 curl_session_count--;
 680         }
 681 #ifdef USE_CURL_MULTI
 682         fill_active_slots();
 683 #endif
 684 }
 685
 686 void finish_active_slot(struct active_request_slot *slot)
 687 {
 688         closedown_active_slot(slot);
 689         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 690
 691         if (slot->finished != NULL)
 692                 (*slot->finished) = 1;
 693
 694         /* Store slot results so they can be read after the slot is reused */
 695         if (slot->results != NULL) {
 696                 slot->results->curl_result = slot->curl_result;
 697                 slot->results->http_code = slot->http_code;
 698         }
 699
 700         /* Run callback if appropriate */
 701         if (slot->callback_func != NULL)
 702                 slot->callback_func(slot->callback_data);
 703 }
 704
 705 void finish_all_active_slots(void)
 706 {
 707         struct active_request_slot *slot = active_queue_head;
 708
 709         while (slot != NULL)
 710                 if (slot->in_use) {
 711                         run_active_slot(slot);
 712                         slot = active_queue_head;
 713                 } else {
 714                         slot = slot->next;
 715                 }
 716 }
 717
 718 /* Helpers for modifying and creating URLs */
 719 static inline int needs_quote(int ch)
 720 {
 721         if (((ch >= 'A') && (ch <= 'Z'))
 722                         || ((ch >= 'a') && (ch <= 'z'))
 723                         || ((ch >= '0') && (ch <= '9'))
 724                         || (ch == '/')
 725                         || (ch == '-')
 726                         || (ch == '.'))
 727                 return 0;
 728         return 1;
 729 }
 730
 731 static char *quote_ref_url(const char *base, const char *ref)
 732 {
 733         struct strbuf buf = STRBUF_INIT;
 734         const char *cp;
 735         int ch;
 736
 737         end_url_with_slash(&buf, base);
 738
 739         for (cp = ref; (ch = *cp) != 0; cp++)
 740                 if (needs_quote(ch))
 741                         strbuf_addf(&buf, "%%%02x", ch);
 742                 else
 743                         strbuf_addch(&buf, *cp);
 744
 745         return strbuf_detach(&buf, NULL);
 746 }
 747
 748 void append_remote_object_url(struct strbuf *buf, const char *url,
 749                               const char *hex,
 750                               int only_two_digit_prefix)
 751 {
 752         end_url_with_slash(buf, url);
 753
 754         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 755         if (!only_two_digit_prefix)
 756                 strbuf_addf(buf, "%s", hex+2);
 757 }
 758
 759 char *get_remote_object_url(const char *url, const char *hex,
 760                             int only_two_digit_prefix)
 761 {
 762         struct strbuf buf = STRBUF_INIT;
 763         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 764         return strbuf_detach(&buf, NULL);
 765 }
 766
 767 int handle_curl_result(struct slot_results *results)
 768 {
 769         if (results->curl_result == CURLE_OK) {
 770                 credential_approve(&http_auth);
 771                 return HTTP_OK;
 772         } else if (missing_target(results))
 773                 return HTTP_MISSING_TARGET;
 774         else if (results->http_code == 401) {
 775                 if (http_auth.username && http_auth.password) {
 776                         credential_reject(&http_auth);
 777                         return HTTP_NOAUTH;
 778                 } else {
 779                         credential_fill(&http_auth);
 780                         return HTTP_REAUTH;
 781                 }
 782         } else {
 783 #if LIBCURL_VERSION_NUM >= 0x070c00
 784                 if (!curl_errorstr[0])
 785                         strlcpy(curl_errorstr,
 786                                 curl_easy_strerror(results->curl_result),
 787                                 sizeof(curl_errorstr));
 788 #endif
 789                 return HTTP_ERROR;
 790         }
 791 }
 792
 793 /* http_request() targets */
 794 #define HTTP_REQUEST_STRBUF     0
 795 #define HTTP_REQUEST_FILE       1
 796
 797 static int http_request(const char *url, struct strbuf *type,
 798                         void *result, int target, int options)
 799 {
 800         struct active_request_slot *slot;
 801         struct slot_results results;
 802         struct curl_slist *headers = NULL;
 803         struct strbuf buf = STRBUF_INIT;
 804         int ret;
 805
 806         slot = get_active_slot();
 807         slot->results = &results;
 808         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 809
 810         if (result == NULL) {
 811                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 812         } else {
 813                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 814                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 815
 816                 if (target == HTTP_REQUEST_FILE) {
 817                         long posn = ftell(result);
 818                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 819                                          fwrite);
 820                         if (posn > 0) {
 821                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 822                                 headers = curl_slist_append(headers, buf.buf);
 823                                 strbuf_reset(&buf);
 824                         }
 825                 } else
 826                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 827                                          fwrite_buffer);
 828         }
 829
 830         strbuf_addstr(&buf, "Pragma:");
 831         if (options & HTTP_NO_CACHE)
 832                 strbuf_addstr(&buf, " no-cache");
 833
 834         headers = curl_slist_append(headers, buf.buf);
 835
 836         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 837         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 838         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 839
 840         if (start_active_slot(slot)) {
 841                 run_active_slot(slot);
 842                 ret = handle_curl_result(&results);
 843         } else {
 844                 error("Unable to start HTTP request for %s", url);
 845                 ret = HTTP_START_FAILED;
 846         }
 847
 848         if (type) {
 849                 char *t;
 850                 strbuf_reset(type);
 851                 curl_easy_getinfo(slot->curl, CURLINFO_CONTENT_TYPE, &t);
 852                 if (t)
 853                         strbuf_addstr(type, t);
 854         }
 855
 856         curl_slist_free_all(headers);
 857         strbuf_release(&buf);
 858
 859         return ret;
 860 }
 861
 862 static int http_request_reauth(const char *url,
 863                                struct strbuf *type,
 864                                void *result, int target,
 865                                int options)
 866 {
 867         int ret = http_request(url, type, result, target, options);
 868         if (ret != HTTP_REAUTH)
 869                 return ret;
 870         return http_request(url, type, result, target, options);
 871 }
 872
 873 int http_get_strbuf(const char *url,
 874                     struct strbuf *type,
 875                     struct strbuf *result, int options)
 876 {
 877         return http_request_reauth(url, type, result,
 878                                    HTTP_REQUEST_STRBUF, options);
 879 }
 880
 881 /*
 882  * Downloads a URL and stores the result in the given file.
 883  *
 884  * If a previous interrupted download is detected (i.e. a previous temporary
 885  * file is still around) the download is resumed.
 886  */
 887 static int http_get_file(const char *url, const char *filename, int options)
 888 {
 889         int ret;
 890         struct strbuf tmpfile = STRBUF_INIT;
 891         FILE *result;
 892
 893         strbuf_addf(&tmpfile, "%s.temp", filename);
 894         result = fopen(tmpfile.buf, "a");
 895         if (! result) {
 896                 error("Unable to open local file %s", tmpfile.buf);
 897                 ret = HTTP_ERROR;
 898                 goto cleanup;
 899         }
 900
 901         ret = http_request_reauth(url, NULL, result, HTTP_REQUEST_FILE, options);
 902         fclose(result);
 903
 904         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 905                 ret = HTTP_ERROR;
 906 cleanup:
 907         strbuf_release(&tmpfile);
 908         return ret;
 909 }
 910
 911 int http_error(const char *url, int ret)
 912 {
 913         /* http_request has already handled HTTP_START_FAILED. */
 914         if (ret != HTTP_START_FAILED)
 915                 error("%s while accessing %s", curl_errorstr, url);
 916
 917         return ret;
 918 }
 919
 920 int http_fetch_ref(const char *base, struct ref *ref)
 921 {
 922         char *url;
 923         struct strbuf buffer = STRBUF_INIT;
 924         int ret = -1;
 925
 926         url = quote_ref_url(base, ref->name);
 927         if (http_get_strbuf(url, NULL, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 928                 strbuf_rtrim(&buffer);
 929                 if (buffer.len == 40)
 930                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 931                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 932                         ref->symref = xstrdup(buffer.buf + 5);
 933                         ret = 0;
 934                 }
 935         }
 936
 937         strbuf_release(&buffer);
 938         free(url);
 939         return ret;
 940 }
 941
 942 /* Helpers for fetching packs */
 943 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 944 {
 945         char *url, *tmp;
 946         struct strbuf buf = STRBUF_INIT;
 947
 948         if (http_is_verbose)
 949                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 950
 951         end_url_with_slash(&buf, base_url);
 952         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 953         url = strbuf_detach(&buf, NULL);
 954
 955         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 956         tmp = strbuf_detach(&buf, NULL);
 957
 958         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 959                 error("Unable to get pack index %s", url);
 960                 free(tmp);
 961                 tmp = NULL;
 962         }
 963
 964         free(url);
 965         return tmp;
 966 }
 967
 968 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 969         unsigned char *sha1, const char *base_url)
 970 {
 971         struct packed_git *new_pack;
 972         char *tmp_idx = NULL;
 973         int ret;
 974
 975         if (has_pack_index(sha1)) {
 976                 new_pack = parse_pack_index(sha1, NULL);
 977                 if (!new_pack)
 978                         return -1; /* parse_pack_index() already issued error message */
 979                 goto add_pack;
 980         }
 981
 982         tmp_idx = fetch_pack_index(sha1, base_url);
 983         if (!tmp_idx)
 984                 return -1;
 985
 986         new_pack = parse_pack_index(sha1, tmp_idx);
 987         if (!new_pack) {
 988                 unlink(tmp_idx);
 989                 free(tmp_idx);
 990
 991                 return -1; /* parse_pack_index() already issued error message */
 992         }
 993
 994         ret = verify_pack_index(new_pack);
 995         if (!ret) {
 996                 close_pack_index(new_pack);
 997                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 998         }
 999         free(tmp_idx);
1000         if (ret)
1001                 return -1;
1002
1003 add_pack:
1004         new_pack->next = *packs_head;
1005         *packs_head = new_pack;
1006         return 0;
1007 }
1008
1009 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1010 {
1011         int ret = 0, i = 0;
1012         char *url, *data;
1013         struct strbuf buf = STRBUF_INIT;
1014         unsigned char sha1[20];
1015
1016         end_url_with_slash(&buf, base_url);
1017         strbuf_addstr(&buf, "objects/info/packs");
1018         url = strbuf_detach(&buf, NULL);
1019
1020         ret = http_get_strbuf(url, NULL, &buf, HTTP_NO_CACHE);
1021         if (ret != HTTP_OK)
1022                 goto cleanup;
1023
1024         data = buf.buf;
1025         while (i < buf.len) {
1026                 switch (data[i]) {
1027                 case 'P':
1028                         i++;
1029                         if (i + 52 <= buf.len &&
1030                             !prefixcmp(data + i, " pack-") &&
1031                             !prefixcmp(data + i + 46, ".pack\n")) {
1032                                 get_sha1_hex(data + i + 6, sha1);
1033                                 fetch_and_setup_pack_index(packs_head, sha1,
1034                                                       base_url);
1035                                 i += 51;
1036                                 break;
1037                         }
1038                 default:
1039                         while (i < buf.len && data[i] != '\n')
1040                                 i++;
1041                 }
1042                 i++;
1043         }
1044
1045 cleanup:
1046         free(url);
1047         return ret;
1048 }
1049
1050 void release_http_pack_request(struct http_pack_request *preq)
1051 {
1052         if (preq->packfile != NULL) {
1053                 fclose(preq->packfile);
1054                 preq->packfile = NULL;
1055         }
1056         if (preq->range_header != NULL) {
1057                 curl_slist_free_all(preq->range_header);
1058                 preq->range_header = NULL;
1059         }
1060         preq->slot = NULL;
1061         free(preq->url);
1062 }
1063
1064 int finish_http_pack_request(struct http_pack_request *preq)
1065 {
1066         struct packed_git **lst;
1067         struct packed_git *p = preq->target;
1068         char *tmp_idx;
1069         struct child_process ip;
1070         const char *ip_argv[8];
1071
1072         close_pack_index(p);
1073
1074         fclose(preq->packfile);
1075         preq->packfile = NULL;
1076
1077         lst = preq->lst;
1078         while (*lst != p)
1079                 lst = &((*lst)->next);
1080         *lst = (*lst)->next;
1081
1082         tmp_idx = xstrdup(preq->tmpfile);
1083         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1084                ".idx.temp");
1085
1086         ip_argv[0] = "index-pack";
1087         ip_argv[1] = "-o";
1088         ip_argv[2] = tmp_idx;
1089         ip_argv[3] = preq->tmpfile;
1090         ip_argv[4] = NULL;
1091
1092         memset(&ip, 0, sizeof(ip));
1093         ip.argv = ip_argv;
1094         ip.git_cmd = 1;
1095         ip.no_stdin = 1;
1096         ip.no_stdout = 1;
1097
1098         if (run_command(&ip)) {
1099                 unlink(preq->tmpfile);
1100                 unlink(tmp_idx);
1101                 free(tmp_idx);
1102                 return -1;
1103         }
1104
1105         unlink(sha1_pack_index_name(p->sha1));
1106
1107         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1108          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1109                 free(tmp_idx);
1110                 return -1;
1111         }
1112
1113         install_packed_git(p);
1114         free(tmp_idx);
1115         return 0;
1116 }
1117
1118 struct http_pack_request *new_http_pack_request(
1119         struct packed_git *target, const char *base_url)
1120 {
1121         long prev_posn = 0;
1122         char range[RANGE_HEADER_SIZE];
1123         struct strbuf buf = STRBUF_INIT;
1124         struct http_pack_request *preq;
1125
1126         preq = xcalloc(1, sizeof(*preq));
1127         preq->target = target;
1128
1129         end_url_with_slash(&buf, base_url);
1130         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1131                 sha1_to_hex(target->sha1));
1132         preq->url = strbuf_detach(&buf, NULL);
1133
1134         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1135                 sha1_pack_name(target->sha1));
1136         preq->packfile = fopen(preq->tmpfile, "a");
1137         if (!preq->packfile) {
1138                 error("Unable to open local file %s for pack",
1139                       preq->tmpfile);
1140                 goto abort;
1141         }
1142
1143         preq->slot = get_active_slot();
1144         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1145         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1146         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1147         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1148                 no_pragma_header);
1149
1150         /*
1151          * If there is data present from a previous transfer attempt,
1152          * resume where it left off
1153          */
1154         prev_posn = ftell(preq->packfile);
1155         if (prev_posn>0) {
1156                 if (http_is_verbose)
1157                         fprintf(stderr,
1158                                 "Resuming fetch of pack %s at byte %ld\n",
1159                                 sha1_to_hex(target->sha1), prev_posn);
1160                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1161                 preq->range_header = curl_slist_append(NULL, range);
1162                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1163                         preq->range_header);
1164         }
1165
1166         return preq;
1167
1168 abort:
1169         free(preq->url);
1170         free(preq);
1171         return NULL;
1172 }
1173
1174 /* Helpers for fetching objects (loose) */
1175 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1176                                void *data)
1177 {
1178         unsigned char expn[4096];
1179         size_t size = eltsize * nmemb;
1180         int posn = 0;
1181         struct http_object_request *freq =
1182                 (struct http_object_request *)data;
1183         do {
1184                 ssize_t retval = xwrite(freq->localfile,
1185                                         (char *) ptr + posn, size - posn);
1186                 if (retval < 0)
1187                         return posn;
1188                 posn += retval;
1189         } while (posn < size);
1190
1191         freq->stream.avail_in = size;
1192         freq->stream.next_in = (void *)ptr;
1193         do {
1194                 freq->stream.next_out = expn;
1195                 freq->stream.avail_out = sizeof(expn);
1196                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1197                 git_SHA1_Update(&freq->c, expn,
1198                                 sizeof(expn) - freq->stream.avail_out);
1199         } while (freq->stream.avail_in && freq->zret == Z_OK);
1200         return size;
1201 }
1202
1203 struct http_object_request *new_http_object_request(const char *base_url,
1204         unsigned char *sha1)
1205 {
1206         char *hex = sha1_to_hex(sha1);
1207         char *filename;
1208         char prevfile[PATH_MAX];
1209         int prevlocal;
1210         char prev_buf[PREV_BUF_SIZE];
1211         ssize_t prev_read = 0;
1212         long prev_posn = 0;
1213         char range[RANGE_HEADER_SIZE];
1214         struct curl_slist *range_header = NULL;
1215         struct http_object_request *freq;
1216
1217         freq = xcalloc(1, sizeof(*freq));
1218         hashcpy(freq->sha1, sha1);
1219         freq->localfile = -1;
1220
1221         filename = sha1_file_name(sha1);
1222         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1223                  "%s.temp", filename);
1224
1225         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1226         unlink_or_warn(prevfile);
1227         rename(freq->tmpfile, prevfile);
1228         unlink_or_warn(freq->tmpfile);
1229
1230         if (freq->localfile != -1)
1231                 error("fd leakage in start: %d", freq->localfile);
1232         freq->localfile = open(freq->tmpfile,
1233                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1234         /*
1235          * This could have failed due to the "lazy directory creation";
1236          * try to mkdir the last path component.
1237          */
1238         if (freq->localfile < 0 && errno == ENOENT) {
1239                 char *dir = strrchr(freq->tmpfile, '/');
1240                 if (dir) {
1241                         *dir = 0;
1242                         mkdir(freq->tmpfile, 0777);
1243                         *dir = '/';
1244                 }
1245                 freq->localfile = open(freq->tmpfile,
1246                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1247         }
1248
1249         if (freq->localfile < 0) {
1250                 error("Couldn't create temporary file %s: %s",
1251                       freq->tmpfile, strerror(errno));
1252                 goto abort;
1253         }
1254
1255         git_inflate_init(&freq->stream);
1256
1257         git_SHA1_Init(&freq->c);
1258
1259         freq->url = get_remote_object_url(base_url, hex, 0);
1260
1261         /*
1262          * If a previous temp file is present, process what was already
1263          * fetched.
1264          */
1265         prevlocal = open(prevfile, O_RDONLY);
1266         if (prevlocal != -1) {
1267                 do {
1268                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1269                         if (prev_read>0) {
1270                                 if (fwrite_sha1_file(prev_buf,
1271                                                      1,
1272                                                      prev_read,
1273                                                      freq) == prev_read) {
1274                                         prev_posn += prev_read;
1275                                 } else {
1276                                         prev_read = -1;
1277                                 }
1278                         }
1279                 } while (prev_read > 0);
1280                 close(prevlocal);
1281         }
1282         unlink_or_warn(prevfile);
1283
1284         /*
1285          * Reset inflate/SHA1 if there was an error reading the previous temp
1286          * file; also rewind to the beginning of the local file.
1287          */
1288         if (prev_read == -1) {
1289                 memset(&freq->stream, 0, sizeof(freq->stream));
1290                 git_inflate_init(&freq->stream);
1291                 git_SHA1_Init(&freq->c);
1292                 if (prev_posn>0) {
1293                         prev_posn = 0;
1294                         lseek(freq->localfile, 0, SEEK_SET);
1295                         if (ftruncate(freq->localfile, 0) < 0) {
1296                                 error("Couldn't truncate temporary file %s: %s",
1297                                           freq->tmpfile, strerror(errno));
1298                                 goto abort;
1299                         }
1300                 }
1301         }
1302
1303         freq->slot = get_active_slot();
1304
1305         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1306         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1307         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1308         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1309         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1310
1311         /*
1312          * If we have successfully processed data from a previous fetch
1313          * attempt, only fetch the data we don't already have.
1314          */
1315         if (prev_posn>0) {
1316                 if (http_is_verbose)
1317                         fprintf(stderr,
1318                                 "Resuming fetch of object %s at byte %ld\n",
1319                                 hex, prev_posn);
1320                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1321                 range_header = curl_slist_append(range_header, range);
1322                 curl_easy_setopt(freq->slot->curl,
1323                                  CURLOPT_HTTPHEADER, range_header);
1324         }
1325
1326         return freq;
1327
1328 abort:
1329         free(freq->url);
1330         free(freq);
1331         return NULL;
1332 }
1333
1334 void process_http_object_request(struct http_object_request *freq)
1335 {
1336         if (freq->slot == NULL)
1337                 return;
1338         freq->curl_result = freq->slot->curl_result;
1339         freq->http_code = freq->slot->http_code;
1340         freq->slot = NULL;
1341 }
1342
1343 int finish_http_object_request(struct http_object_request *freq)
1344 {
1345         struct stat st;
1346
1347         close(freq->localfile);
1348         freq->localfile = -1;
1349
1350         process_http_object_request(freq);
1351
1352         if (freq->http_code == 416) {
1353                 warning("requested range invalid; we may already have all the data.");
1354         } else if (freq->curl_result != CURLE_OK) {
1355                 if (stat(freq->tmpfile, &st) == 0)
1356                         if (st.st_size == 0)
1357                                 unlink_or_warn(freq->tmpfile);
1358                 return -1;
1359         }
1360
1361         git_inflate_end(&freq->stream);
1362         git_SHA1_Final(freq->real_sha1, &freq->c);
1363         if (freq->zret != Z_STREAM_END) {
1364                 unlink_or_warn(freq->tmpfile);
1365                 return -1;
1366         }
1367         if (hashcmp(freq->sha1, freq->real_sha1)) {
1368                 unlink_or_warn(freq->tmpfile);
1369                 return -1;
1370         }
1371         freq->rename =
1372                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1373
1374         return freq->rename;
1375 }
1376
1377 void abort_http_object_request(struct http_object_request *freq)
1378 {
1379         unlink_or_warn(freq->tmpfile);
1380
1381         release_http_object_request(freq);
1382 }
1383
1384 void release_http_object_request(struct http_object_request *freq)
1385 {
1386         if (freq->localfile != -1) {
1387                 close(freq->localfile);
1388                 freq->localfile = -1;
1389         }
1390         if (freq->url != NULL) {
1391                 free(freq->url);
1392                 freq->url = NULL;
1393         }
1394         if (freq->slot != NULL) {
1395                 freq->slot->callback_func = NULL;
1396                 freq->slot->callback_data = NULL;
1397                 release_active_slot(freq->slot);
1398                 freq->slot = NULL;
1399         }
1400 }