http.c

   1 #include "http.h"
   2 #include "pack.h"
   3 #include "sideband.h"
   4 #include "run-command.h"
   5 #include "url.h"
   6
   7 int data_received;
   8 int active_requests;
   9 int http_is_verbose;
  10 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  11
  12 #if LIBCURL_VERSION_NUM >= 0x070a06
  13 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  14 #endif
  15
  16 static int min_curl_sessions = 1;
  17 static int curl_session_count;
  18 #ifdef USE_CURL_MULTI
  19 static int max_requests = -1;
  20 static CURLM *curlm;
  21 #endif
  22 #ifndef NO_CURL_EASY_DUPHANDLE
  23 static CURL *curl_default;
  24 #endif
  25
  26 #define PREV_BUF_SIZE 4096
  27 #define RANGE_HEADER_SIZE 30
  28
  29 char curl_errorstr[CURL_ERROR_SIZE];
  30
  31 static int curl_ssl_verify = -1;
  32 static const char *ssl_cert;
  33 #if LIBCURL_VERSION_NUM >= 0x070903
  34 static const char *ssl_key;
  35 #endif
  36 #if LIBCURL_VERSION_NUM >= 0x070908
  37 static const char *ssl_capath;
  38 #endif
  39 static const char *ssl_cainfo;
  40 static long curl_low_speed_limit = -1;
  41 static long curl_low_speed_time = -1;
  42 static int curl_ftp_no_epsv;
  43 static const char *curl_http_proxy;
  44 static const char *curl_cookie_file;
  45 static char *user_name, *user_pass;
  46 static const char *user_agent;
  47
  48 #if LIBCURL_VERSION_NUM >= 0x071700
  49 /* Use CURLOPT_KEYPASSWD as is */
  50 #elif LIBCURL_VERSION_NUM >= 0x070903
  51 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  52 #else
  53 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  54 #endif
  55
  56 static char *ssl_cert_password;
  57 static int ssl_cert_password_required;
  58
  59 static struct curl_slist *pragma_header;
  60 static struct curl_slist *no_pragma_header;
  61
  62 static struct active_request_slot *active_queue_head;
  63
  64 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  65 {
  66         size_t size = eltsize * nmemb;
  67         struct buffer *buffer = buffer_;
  68
  69         if (size > buffer->buf.len - buffer->posn)
  70                 size = buffer->buf.len - buffer->posn;
  71         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  72         buffer->posn += size;
  73
  74         return size;
  75 }
  76
  77 #ifndef NO_CURL_IOCTL
  78 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  79 {
  80         struct buffer *buffer = clientp;
  81
  82         switch (cmd) {
  83         case CURLIOCMD_NOP:
  84                 return CURLIOE_OK;
  85
  86         case CURLIOCMD_RESTARTREAD:
  87                 buffer->posn = 0;
  88                 return CURLIOE_OK;
  89
  90         default:
  91                 return CURLIOE_UNKNOWNCMD;
  92         }
  93 }
  94 #endif
  95
  96 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  97 {
  98         size_t size = eltsize * nmemb;
  99         struct strbuf *buffer = buffer_;
 100
 101         strbuf_add(buffer, ptr, size);
 102         data_received++;
 103         return size;
 104 }
 105
 106 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 107 {
 108         data_received++;
 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 (user_name) {
 215                 struct strbuf up = STRBUF_INIT;
 216                 if (!user_pass)
 217                         user_pass = xstrdup(git_getpass("Password: "));
 218                 strbuf_addf(&up, "%s:%s", user_name, user_pass);
 219                 curl_easy_setopt(result, CURLOPT_USERPWD,
 220                                  strbuf_detach(&up, NULL));
 221         }
 222 }
 223
 224 static int has_cert_password(void)
 225 {
 226         if (ssl_cert_password != NULL)
 227                 return 1;
 228         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 229                 return 0;
 230         /* Only prompt the user once. */
 231         ssl_cert_password_required = -1;
 232         ssl_cert_password = git_getpass("Certificate Password: ");
 233         if (ssl_cert_password != NULL) {
 234                 ssl_cert_password = xstrdup(ssl_cert_password);
 235                 return 1;
 236         } else
 237                 return 0;
 238 }
 239
 240 static CURL *get_curl_handle(void)
 241 {
 242         CURL *result = curl_easy_init();
 243
 244         if (!curl_ssl_verify) {
 245                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 246                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 247         } else {
 248                 /* Verify authenticity of the peer's certificate */
 249                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 250                 /* The name in the cert must match whom we tried to connect */
 251                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 252         }
 253
 254 #if LIBCURL_VERSION_NUM >= 0x070907
 255         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 256 #endif
 257 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 258         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 259 #endif
 260
 261         init_curl_http_auth(result);
 262
 263         if (ssl_cert != NULL)
 264                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 265         if (has_cert_password())
 266                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 267 #if LIBCURL_VERSION_NUM >= 0x070903
 268         if (ssl_key != NULL)
 269                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 270 #endif
 271 #if LIBCURL_VERSION_NUM >= 0x070908
 272         if (ssl_capath != NULL)
 273                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 274 #endif
 275         if (ssl_cainfo != NULL)
 276                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 277         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 278
 279         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 280                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 281                                  curl_low_speed_limit);
 282                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 283                                  curl_low_speed_time);
 284         }
 285
 286         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 287 #if LIBCURL_VERSION_NUM >= 0x071301
 288         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 289 #elif LIBCURL_VERSION_NUM >= 0x071101
 290         curl_easy_setopt(result, CURLOPT_POST301, 1);
 291 #endif
 292
 293         if (getenv("GIT_CURL_VERBOSE"))
 294                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 295
 296         curl_easy_setopt(result, CURLOPT_USERAGENT,
 297                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 298
 299         if (curl_ftp_no_epsv)
 300                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 301
 302         if (curl_http_proxy)
 303                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 304
 305         return result;
 306 }
 307
 308 static void http_auth_init(const char *url)
 309 {
 310         char *at, *colon, *cp, *slash, *decoded;
 311         int len;
 312
 313         cp = strstr(url, "://");
 314         if (!cp)
 315                 return;
 316
 317         /*
 318          * Ok, the URL looks like "proto://something".  Which one?
 319          * "proto://<user>:<pass>@<host>/...",
 320          * "proto://<user>@<host>/...", or just
 321          * "proto://<host>/..."?
 322          */
 323         cp += 3;
 324         at = strchr(cp, '@');
 325         colon = strchr(cp, ':');
 326         slash = strchrnul(cp, '/');
 327         if (!at || slash <= at)
 328                 return; /* No credentials */
 329         if (!colon || at <= colon) {
 330                 /* Only username */
 331                 len = at - cp;
 332                 user_name = xmalloc(len + 1);
 333                 memcpy(user_name, cp, len);
 334                 user_name[len] = '\0';
 335                 decoded = url_decode(user_name);
 336                 free(user_name);
 337                 user_name = decoded;
 338                 user_pass = NULL;
 339         } else {
 340                 len = colon - cp;
 341                 user_name = xmalloc(len + 1);
 342                 memcpy(user_name, cp, len);
 343                 user_name[len] = '\0';
 344                 decoded = url_decode(user_name);
 345                 free(user_name);
 346                 user_name = decoded;
 347                 len = at - (colon + 1);
 348                 user_pass = xmalloc(len + 1);
 349                 memcpy(user_pass, colon + 1, len);
 350                 user_pass[len] = '\0';
 351                 decoded = url_decode(user_pass);
 352                 free(user_pass);
 353                 user_pass = decoded;
 354         }
 355 }
 356
 357 static void set_from_env(const char **var, const char *envname)
 358 {
 359         const char *val = getenv(envname);
 360         if (val)
 361                 *var = val;
 362 }
 363
 364 void http_init(struct remote *remote)
 365 {
 366         char *low_speed_limit;
 367         char *low_speed_time;
 368
 369         http_is_verbose = 0;
 370
 371         git_config(http_options, NULL);
 372
 373         curl_global_init(CURL_GLOBAL_ALL);
 374
 375         if (remote && remote->http_proxy)
 376                 curl_http_proxy = xstrdup(remote->http_proxy);
 377
 378         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 379         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 380
 381 #ifdef USE_CURL_MULTI
 382         {
 383                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 384                 if (http_max_requests != NULL)
 385                         max_requests = atoi(http_max_requests);
 386         }
 387
 388         curlm = curl_multi_init();
 389         if (curlm == NULL) {
 390                 fprintf(stderr, "Error creating curl multi handle.\n");
 391                 exit(1);
 392         }
 393 #endif
 394
 395         if (getenv("GIT_SSL_NO_VERIFY"))
 396                 curl_ssl_verify = 0;
 397
 398         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 399 #if LIBCURL_VERSION_NUM >= 0x070903
 400         set_from_env(&ssl_key, "GIT_SSL_KEY");
 401 #endif
 402 #if LIBCURL_VERSION_NUM >= 0x070908
 403         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 404 #endif
 405         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 406
 407         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 408
 409         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 410         if (low_speed_limit != NULL)
 411                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 412         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 413         if (low_speed_time != NULL)
 414                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 415
 416         if (curl_ssl_verify == -1)
 417                 curl_ssl_verify = 1;
 418
 419         curl_session_count = 0;
 420 #ifdef USE_CURL_MULTI
 421         if (max_requests < 1)
 422                 max_requests = DEFAULT_MAX_REQUESTS;
 423 #endif
 424
 425         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 426                 curl_ftp_no_epsv = 1;
 427
 428         if (remote && remote->url && remote->url[0]) {
 429                 http_auth_init(remote->url[0]);
 430                 if (!ssl_cert_password_required &&
 431                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 432                     !prefixcmp(remote->url[0], "https://"))
 433                         ssl_cert_password_required = 1;
 434         }
 435
 436 #ifndef NO_CURL_EASY_DUPHANDLE
 437         curl_default = get_curl_handle();
 438 #endif
 439 }
 440
 441 void http_cleanup(void)
 442 {
 443         struct active_request_slot *slot = active_queue_head;
 444
 445         while (slot != NULL) {
 446                 struct active_request_slot *next = slot->next;
 447                 if (slot->curl != NULL) {
 448 #ifdef USE_CURL_MULTI
 449                         curl_multi_remove_handle(curlm, slot->curl);
 450 #endif
 451                         curl_easy_cleanup(slot->curl);
 452                 }
 453                 free(slot);
 454                 slot = next;
 455         }
 456         active_queue_head = NULL;
 457
 458 #ifndef NO_CURL_EASY_DUPHANDLE
 459         curl_easy_cleanup(curl_default);
 460 #endif
 461
 462 #ifdef USE_CURL_MULTI
 463         curl_multi_cleanup(curlm);
 464 #endif
 465         curl_global_cleanup();
 466
 467         curl_slist_free_all(pragma_header);
 468         pragma_header = NULL;
 469
 470         curl_slist_free_all(no_pragma_header);
 471         no_pragma_header = NULL;
 472
 473         if (curl_http_proxy) {
 474                 free((void *)curl_http_proxy);
 475                 curl_http_proxy = NULL;
 476         }
 477
 478         if (ssl_cert_password != NULL) {
 479                 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 480                 free(ssl_cert_password);
 481                 ssl_cert_password = NULL;
 482         }
 483         ssl_cert_password_required = 0;
 484 }
 485
 486 struct active_request_slot *get_active_slot(void)
 487 {
 488         struct active_request_slot *slot = active_queue_head;
 489         struct active_request_slot *newslot;
 490
 491 #ifdef USE_CURL_MULTI
 492         int num_transfers;
 493
 494         /* Wait for a slot to open up if the queue is full */
 495         while (active_requests >= max_requests) {
 496                 curl_multi_perform(curlm, &num_transfers);
 497                 if (num_transfers < active_requests)
 498                         process_curl_messages();
 499         }
 500 #endif
 501
 502         while (slot != NULL && slot->in_use)
 503                 slot = slot->next;
 504
 505         if (slot == NULL) {
 506                 newslot = xmalloc(sizeof(*newslot));
 507                 newslot->curl = NULL;
 508                 newslot->in_use = 0;
 509                 newslot->next = NULL;
 510
 511                 slot = active_queue_head;
 512                 if (slot == NULL) {
 513                         active_queue_head = newslot;
 514                 } else {
 515                         while (slot->next != NULL)
 516                                 slot = slot->next;
 517                         slot->next = newslot;
 518                 }
 519                 slot = newslot;
 520         }
 521
 522         if (slot->curl == NULL) {
 523 #ifdef NO_CURL_EASY_DUPHANDLE
 524                 slot->curl = get_curl_handle();
 525 #else
 526                 slot->curl = curl_easy_duphandle(curl_default);
 527 #endif
 528                 curl_session_count++;
 529         }
 530
 531         active_requests++;
 532         slot->in_use = 1;
 533         slot->local = NULL;
 534         slot->results = NULL;
 535         slot->finished = NULL;
 536         slot->callback_data = NULL;
 537         slot->callback_func = NULL;
 538         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 539         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 540         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 541         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 542         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 543         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 544         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 545         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 546         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 547
 548         return slot;
 549 }
 550
 551 int start_active_slot(struct active_request_slot *slot)
 552 {
 553 #ifdef USE_CURL_MULTI
 554         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 555         int num_transfers;
 556
 557         if (curlm_result != CURLM_OK &&
 558             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 559                 active_requests--;
 560                 slot->in_use = 0;
 561                 return 0;
 562         }
 563
 564         /*
 565          * We know there must be something to do, since we just added
 566          * something.
 567          */
 568         curl_multi_perform(curlm, &num_transfers);
 569 #endif
 570         return 1;
 571 }
 572
 573 #ifdef USE_CURL_MULTI
 574 struct fill_chain {
 575         void *data;
 576         int (*fill)(void *);
 577         struct fill_chain *next;
 578 };
 579
 580 static struct fill_chain *fill_cfg;
 581
 582 void add_fill_function(void *data, int (*fill)(void *))
 583 {
 584         struct fill_chain *new = xmalloc(sizeof(*new));
 585         struct fill_chain **linkp = &fill_cfg;
 586         new->data = data;
 587         new->fill = fill;
 588         new->next = NULL;
 589         while (*linkp)
 590                 linkp = &(*linkp)->next;
 591         *linkp = new;
 592 }
 593
 594 void fill_active_slots(void)
 595 {
 596         struct active_request_slot *slot = active_queue_head;
 597
 598         while (active_requests < max_requests) {
 599                 struct fill_chain *fill;
 600                 for (fill = fill_cfg; fill; fill = fill->next)
 601                         if (fill->fill(fill->data))
 602                                 break;
 603
 604                 if (!fill)
 605                         break;
 606         }
 607
 608         while (slot != NULL) {
 609                 if (!slot->in_use && slot->curl != NULL
 610                         && curl_session_count > min_curl_sessions) {
 611                         curl_easy_cleanup(slot->curl);
 612                         slot->curl = NULL;
 613                         curl_session_count--;
 614                 }
 615                 slot = slot->next;
 616         }
 617 }
 618
 619 void step_active_slots(void)
 620 {
 621         int num_transfers;
 622         CURLMcode curlm_result;
 623
 624         do {
 625                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 626         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 627         if (num_transfers < active_requests) {
 628                 process_curl_messages();
 629                 fill_active_slots();
 630         }
 631 }
 632 #endif
 633
 634 void run_active_slot(struct active_request_slot *slot)
 635 {
 636 #ifdef USE_CURL_MULTI
 637         long last_pos = 0;
 638         long current_pos;
 639         fd_set readfds;
 640         fd_set writefds;
 641         fd_set excfds;
 642         int max_fd;
 643         struct timeval select_timeout;
 644         int finished = 0;
 645
 646         slot->finished = &finished;
 647         while (!finished) {
 648                 data_received = 0;
 649                 step_active_slots();
 650
 651                 if (!data_received && slot->local != NULL) {
 652                         current_pos = ftell(slot->local);
 653                         if (current_pos > last_pos)
 654                                 data_received++;
 655                         last_pos = current_pos;
 656                 }
 657
 658                 if (slot->in_use && !data_received) {
 659                         max_fd = 0;
 660                         FD_ZERO(&readfds);
 661                         FD_ZERO(&writefds);
 662                         FD_ZERO(&excfds);
 663                         select_timeout.tv_sec = 0;
 664                         select_timeout.tv_usec = 50000;
 665                         select(max_fd, &readfds, &writefds,
 666                                &excfds, &select_timeout);
 667                 }
 668         }
 669 #else
 670         while (slot->in_use) {
 671                 slot->curl_result = curl_easy_perform(slot->curl);
 672                 finish_active_slot(slot);
 673         }
 674 #endif
 675 }
 676
 677 static void closedown_active_slot(struct active_request_slot *slot)
 678 {
 679         active_requests--;
 680         slot->in_use = 0;
 681 }
 682
 683 static void release_active_slot(struct active_request_slot *slot)
 684 {
 685         closedown_active_slot(slot);
 686         if (slot->curl && curl_session_count > min_curl_sessions) {
 687 #ifdef USE_CURL_MULTI
 688                 curl_multi_remove_handle(curlm, slot->curl);
 689 #endif
 690                 curl_easy_cleanup(slot->curl);
 691                 slot->curl = NULL;
 692                 curl_session_count--;
 693         }
 694 #ifdef USE_CURL_MULTI
 695         fill_active_slots();
 696 #endif
 697 }
 698
 699 void finish_active_slot(struct active_request_slot *slot)
 700 {
 701         closedown_active_slot(slot);
 702         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 703
 704         if (slot->finished != NULL)
 705                 (*slot->finished) = 1;
 706
 707         /* Store slot results so they can be read after the slot is reused */
 708         if (slot->results != NULL) {
 709                 slot->results->curl_result = slot->curl_result;
 710                 slot->results->http_code = slot->http_code;
 711         }
 712
 713         /* Run callback if appropriate */
 714         if (slot->callback_func != NULL)
 715                 slot->callback_func(slot->callback_data);
 716 }
 717
 718 void finish_all_active_slots(void)
 719 {
 720         struct active_request_slot *slot = active_queue_head;
 721
 722         while (slot != NULL)
 723                 if (slot->in_use) {
 724                         run_active_slot(slot);
 725                         slot = active_queue_head;
 726                 } else {
 727                         slot = slot->next;
 728                 }
 729 }
 730
 731 /* Helpers for modifying and creating URLs */
 732 static inline int needs_quote(int ch)
 733 {
 734         if (((ch >= 'A') && (ch <= 'Z'))
 735                         || ((ch >= 'a') && (ch <= 'z'))
 736                         || ((ch >= '0') && (ch <= '9'))
 737                         || (ch == '/')
 738                         || (ch == '-')
 739                         || (ch == '.'))
 740                 return 0;
 741         return 1;
 742 }
 743
 744 static inline int hex(int v)
 745 {
 746         if (v < 10)
 747                 return '0' + v;
 748         else
 749                 return 'A' + v - 10;
 750 }
 751
 752 static char *quote_ref_url(const char *base, const char *ref)
 753 {
 754         struct strbuf buf = STRBUF_INIT;
 755         const char *cp;
 756         int ch;
 757
 758         end_url_with_slash(&buf, base);
 759
 760         for (cp = ref; (ch = *cp) != 0; cp++)
 761                 if (needs_quote(ch))
 762                         strbuf_addf(&buf, "%%%02x", ch);
 763                 else
 764                         strbuf_addch(&buf, *cp);
 765
 766         return strbuf_detach(&buf, NULL);
 767 }
 768
 769 void append_remote_object_url(struct strbuf *buf, const char *url,
 770                               const char *hex,
 771                               int only_two_digit_prefix)
 772 {
 773         end_url_with_slash(buf, url);
 774
 775         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 776         if (!only_two_digit_prefix)
 777                 strbuf_addf(buf, "%s", hex+2);
 778 }
 779
 780 char *get_remote_object_url(const char *url, const char *hex,
 781                             int only_two_digit_prefix)
 782 {
 783         struct strbuf buf = STRBUF_INIT;
 784         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 785         return strbuf_detach(&buf, NULL);
 786 }
 787
 788 /* http_request() targets */
 789 #define HTTP_REQUEST_STRBUF     0
 790 #define HTTP_REQUEST_FILE       1
 791
 792 static int http_request(const char *url, void *result, int target, int options)
 793 {
 794         struct active_request_slot *slot;
 795         struct slot_results results;
 796         struct curl_slist *headers = NULL;
 797         struct strbuf buf = STRBUF_INIT;
 798         int ret;
 799
 800         slot = get_active_slot();
 801         slot->results = &results;
 802         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 803
 804         if (result == NULL) {
 805                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 806         } else {
 807                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 808                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 809
 810                 if (target == HTTP_REQUEST_FILE) {
 811                         long posn = ftell(result);
 812                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 813                                          fwrite);
 814                         if (posn > 0) {
 815                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 816                                 headers = curl_slist_append(headers, buf.buf);
 817                                 strbuf_reset(&buf);
 818                         }
 819                         slot->local = result;
 820                 } else
 821                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 822                                          fwrite_buffer);
 823         }
 824
 825         strbuf_addstr(&buf, "Pragma:");
 826         if (options & HTTP_NO_CACHE)
 827                 strbuf_addstr(&buf, " no-cache");
 828
 829         headers = curl_slist_append(headers, buf.buf);
 830
 831         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 832         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 833
 834         if (start_active_slot(slot)) {
 835                 run_active_slot(slot);
 836                 if (results.curl_result == CURLE_OK)
 837                         ret = HTTP_OK;
 838                 else if (missing_target(&results))
 839                         ret = HTTP_MISSING_TARGET;
 840                 else if (results.http_code == 401) {
 841                         if (user_name) {
 842                                 ret = HTTP_NOAUTH;
 843                         } else {
 844                                 /*
 845                                  * git_getpass is needed here because its very likely stdin/stdout are
 846                                  * pipes to our parent process.  So we instead need to use /dev/tty,
 847                                  * but that is non-portable.  Using git_getpass() can at least be stubbed
 848                                  * on other platforms with a different implementation if/when necessary.
 849                                  */
 850                                 user_name = xstrdup(git_getpass("Username: "));
 851                                 init_curl_http_auth(slot->curl);
 852                                 ret = HTTP_REAUTH;
 853                         }
 854                 } else {
 855                         if (!curl_errorstr[0])
 856                                 strlcpy(curl_errorstr,
 857                                         curl_easy_strerror(results.curl_result),
 858                                         sizeof(curl_errorstr));
 859                         ret = HTTP_ERROR;
 860                 }
 861         } else {
 862                 error("Unable to start HTTP request for %s", url);
 863                 ret = HTTP_START_FAILED;
 864         }
 865
 866         slot->local = NULL;
 867         curl_slist_free_all(headers);
 868         strbuf_release(&buf);
 869
 870         return ret;
 871 }
 872
 873 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 874 {
 875         int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 876         if (http_ret == HTTP_REAUTH) {
 877                 http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 878         }
 879         return http_ret;
 880 }
 881
 882 /*
 883  * Downloads an url and stores the result in the given file.
 884  *
 885  * If a previous interrupted download is detected (i.e. a previous temporary
 886  * file is still around) the download is resumed.
 887  */
 888 static int http_get_file(const char *url, const char *filename, int options)
 889 {
 890         int ret;
 891         struct strbuf tmpfile = STRBUF_INIT;
 892         FILE *result;
 893
 894         strbuf_addf(&tmpfile, "%s.temp", filename);
 895         result = fopen(tmpfile.buf, "a");
 896         if (! result) {
 897                 error("Unable to open local file %s", tmpfile.buf);
 898                 ret = HTTP_ERROR;
 899                 goto cleanup;
 900         }
 901
 902         ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 903         fclose(result);
 904
 905         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 906                 ret = HTTP_ERROR;
 907 cleanup:
 908         strbuf_release(&tmpfile);
 909         return ret;
 910 }
 911
 912 int http_error(const char *url, int ret)
 913 {
 914         /* http_request has already handled HTTP_START_FAILED. */
 915         if (ret != HTTP_START_FAILED)
 916                 error("%s while accessing %s", curl_errorstr, url);
 917
 918         return ret;
 919 }
 920
 921 int http_fetch_ref(const char *base, struct ref *ref)
 922 {
 923         char *url;
 924         struct strbuf buffer = STRBUF_INIT;
 925         int ret = -1;
 926
 927         url = quote_ref_url(base, ref->name);
 928         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 929                 strbuf_rtrim(&buffer);
 930                 if (buffer.len == 40)
 931                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 932                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 933                         ref->symref = xstrdup(buffer.buf + 5);
 934                         ret = 0;
 935                 }
 936         }
 937
 938         strbuf_release(&buffer);
 939         free(url);
 940         return ret;
 941 }
 942
 943 /* Helpers for fetching packs */
 944 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 945 {
 946         char *url, *tmp;
 947         struct strbuf buf = STRBUF_INIT;
 948
 949         if (http_is_verbose)
 950                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 951
 952         end_url_with_slash(&buf, base_url);
 953         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 954         url = strbuf_detach(&buf, NULL);
 955
 956         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 957         tmp = strbuf_detach(&buf, NULL);
 958
 959         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 960                 error("Unable to get pack index %s\n", url);
 961                 free(tmp);
 962                 tmp = NULL;
 963         }
 964
 965         free(url);
 966         return tmp;
 967 }
 968
 969 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 970         unsigned char *sha1, const char *base_url)
 971 {
 972         struct packed_git *new_pack;
 973         char *tmp_idx = NULL;
 974         int ret;
 975
 976         if (has_pack_index(sha1)) {
 977                 new_pack = parse_pack_index(sha1, NULL);
 978                 if (!new_pack)
 979                         return -1; /* parse_pack_index() already issued error message */
 980                 goto add_pack;
 981         }
 982
 983         tmp_idx = fetch_pack_index(sha1, base_url);
 984         if (!tmp_idx)
 985                 return -1;
 986
 987         new_pack = parse_pack_index(sha1, tmp_idx);
 988         if (!new_pack) {
 989                 unlink(tmp_idx);
 990                 free(tmp_idx);
 991
 992                 return -1; /* parse_pack_index() already issued error message */
 993         }
 994
 995         ret = verify_pack_index(new_pack);
 996         if (!ret) {
 997                 close_pack_index(new_pack);
 998                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 999         }
1000         free(tmp_idx);
1001         if (ret)
1002                 return -1;
1003
1004 add_pack:
1005         new_pack->next = *packs_head;
1006         *packs_head = new_pack;
1007         return 0;
1008 }
1009
1010 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1011 {
1012         int ret = 0, i = 0;
1013         char *url, *data;
1014         struct strbuf buf = STRBUF_INIT;
1015         unsigned char sha1[20];
1016
1017         end_url_with_slash(&buf, base_url);
1018         strbuf_addstr(&buf, "objects/info/packs");
1019         url = strbuf_detach(&buf, NULL);
1020
1021         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1022         if (ret != HTTP_OK)
1023                 goto cleanup;
1024
1025         data = buf.buf;
1026         while (i < buf.len) {
1027                 switch (data[i]) {
1028                 case 'P':
1029                         i++;
1030                         if (i + 52 <= buf.len &&
1031                             !prefixcmp(data + i, " pack-") &&
1032                             !prefixcmp(data + i + 46, ".pack\n")) {
1033                                 get_sha1_hex(data + i + 6, sha1);
1034                                 fetch_and_setup_pack_index(packs_head, sha1,
1035                                                       base_url);
1036                                 i += 51;
1037                                 break;
1038                         }
1039                 default:
1040                         while (i < buf.len && data[i] != '\n')
1041                                 i++;
1042                 }
1043                 i++;
1044         }
1045
1046 cleanup:
1047         free(url);
1048         return ret;
1049 }
1050
1051 void release_http_pack_request(struct http_pack_request *preq)
1052 {
1053         if (preq->packfile != NULL) {
1054                 fclose(preq->packfile);
1055                 preq->packfile = NULL;
1056                 preq->slot->local = NULL;
1057         }
1058         if (preq->range_header != NULL) {
1059                 curl_slist_free_all(preq->range_header);
1060                 preq->range_header = NULL;
1061         }
1062         preq->slot = NULL;
1063         free(preq->url);
1064 }
1065
1066 int finish_http_pack_request(struct http_pack_request *preq)
1067 {
1068         struct packed_git **lst;
1069         struct packed_git *p = preq->target;
1070         char *tmp_idx;
1071         struct child_process ip;
1072         const char *ip_argv[8];
1073
1074         close_pack_index(p);
1075
1076         fclose(preq->packfile);
1077         preq->packfile = NULL;
1078         preq->slot->local = NULL;
1079
1080         lst = preq->lst;
1081         while (*lst != p)
1082                 lst = &((*lst)->next);
1083         *lst = (*lst)->next;
1084
1085         tmp_idx = xstrdup(preq->tmpfile);
1086         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1087                ".idx.temp");
1088
1089         ip_argv[0] = "index-pack";
1090         ip_argv[1] = "-o";
1091         ip_argv[2] = tmp_idx;
1092         ip_argv[3] = preq->tmpfile;
1093         ip_argv[4] = NULL;
1094
1095         memset(&ip, 0, sizeof(ip));
1096         ip.argv = ip_argv;
1097         ip.git_cmd = 1;
1098         ip.no_stdin = 1;
1099         ip.no_stdout = 1;
1100
1101         if (run_command(&ip)) {
1102                 unlink(preq->tmpfile);
1103                 unlink(tmp_idx);
1104                 free(tmp_idx);
1105                 return -1;
1106         }
1107
1108         unlink(sha1_pack_index_name(p->sha1));
1109
1110         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1111          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1112                 free(tmp_idx);
1113                 return -1;
1114         }
1115
1116         install_packed_git(p);
1117         free(tmp_idx);
1118         return 0;
1119 }
1120
1121 struct http_pack_request *new_http_pack_request(
1122         struct packed_git *target, const char *base_url)
1123 {
1124         long prev_posn = 0;
1125         char range[RANGE_HEADER_SIZE];
1126         struct strbuf buf = STRBUF_INIT;
1127         struct http_pack_request *preq;
1128
1129         preq = xcalloc(1, sizeof(*preq));
1130         preq->target = target;
1131
1132         end_url_with_slash(&buf, base_url);
1133         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1134                 sha1_to_hex(target->sha1));
1135         preq->url = strbuf_detach(&buf, NULL);
1136
1137         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1138                 sha1_pack_name(target->sha1));
1139         preq->packfile = fopen(preq->tmpfile, "a");
1140         if (!preq->packfile) {
1141                 error("Unable to open local file %s for pack",
1142                       preq->tmpfile);
1143                 goto abort;
1144         }
1145
1146         preq->slot = get_active_slot();
1147         preq->slot->local = preq->packfile;
1148         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1149         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1150         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1151         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1152                 no_pragma_header);
1153
1154         /*
1155          * If there is data present from a previous transfer attempt,
1156          * resume where it left off
1157          */
1158         prev_posn = ftell(preq->packfile);
1159         if (prev_posn>0) {
1160                 if (http_is_verbose)
1161                         fprintf(stderr,
1162                                 "Resuming fetch of pack %s at byte %ld\n",
1163                                 sha1_to_hex(target->sha1), prev_posn);
1164                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1165                 preq->range_header = curl_slist_append(NULL, range);
1166                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1167                         preq->range_header);
1168         }
1169
1170         return preq;
1171
1172 abort:
1173         free(preq->url);
1174         free(preq);
1175         return NULL;
1176 }
1177
1178 /* Helpers for fetching objects (loose) */
1179 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1180                                void *data)
1181 {
1182         unsigned char expn[4096];
1183         size_t size = eltsize * nmemb;
1184         int posn = 0;
1185         struct http_object_request *freq =
1186                 (struct http_object_request *)data;
1187         do {
1188                 ssize_t retval = xwrite(freq->localfile,
1189                                         (char *) ptr + posn, size - posn);
1190                 if (retval < 0)
1191                         return posn;
1192                 posn += retval;
1193         } while (posn < size);
1194
1195         freq->stream.avail_in = size;
1196         freq->stream.next_in = (void *)ptr;
1197         do {
1198                 freq->stream.next_out = expn;
1199                 freq->stream.avail_out = sizeof(expn);
1200                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1201                 git_SHA1_Update(&freq->c, expn,
1202                                 sizeof(expn) - freq->stream.avail_out);
1203         } while (freq->stream.avail_in && freq->zret == Z_OK);
1204         data_received++;
1205         return size;
1206 }
1207
1208 struct http_object_request *new_http_object_request(const char *base_url,
1209         unsigned char *sha1)
1210 {
1211         char *hex = sha1_to_hex(sha1);
1212         char *filename;
1213         char prevfile[PATH_MAX];
1214         int prevlocal;
1215         char prev_buf[PREV_BUF_SIZE];
1216         ssize_t prev_read = 0;
1217         long prev_posn = 0;
1218         char range[RANGE_HEADER_SIZE];
1219         struct curl_slist *range_header = NULL;
1220         struct http_object_request *freq;
1221
1222         freq = xcalloc(1, sizeof(*freq));
1223         hashcpy(freq->sha1, sha1);
1224         freq->localfile = -1;
1225
1226         filename = sha1_file_name(sha1);
1227         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1228                  "%s.temp", filename);
1229
1230         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1231         unlink_or_warn(prevfile);
1232         rename(freq->tmpfile, prevfile);
1233         unlink_or_warn(freq->tmpfile);
1234
1235         if (freq->localfile != -1)
1236                 error("fd leakage in start: %d", freq->localfile);
1237         freq->localfile = open(freq->tmpfile,
1238                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1239         /*
1240          * This could have failed due to the "lazy directory creation";
1241          * try to mkdir the last path component.
1242          */
1243         if (freq->localfile < 0 && errno == ENOENT) {
1244                 char *dir = strrchr(freq->tmpfile, '/');
1245                 if (dir) {
1246                         *dir = 0;
1247                         mkdir(freq->tmpfile, 0777);
1248                         *dir = '/';
1249                 }
1250                 freq->localfile = open(freq->tmpfile,
1251                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1252         }
1253
1254         if (freq->localfile < 0) {
1255                 error("Couldn't create temporary file %s: %s",
1256                       freq->tmpfile, strerror(errno));
1257                 goto abort;
1258         }
1259
1260         git_inflate_init(&freq->stream);
1261
1262         git_SHA1_Init(&freq->c);
1263
1264         freq->url = get_remote_object_url(base_url, hex, 0);
1265
1266         /*
1267          * If a previous temp file is present, process what was already
1268          * fetched.
1269          */
1270         prevlocal = open(prevfile, O_RDONLY);
1271         if (prevlocal != -1) {
1272                 do {
1273                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1274                         if (prev_read>0) {
1275                                 if (fwrite_sha1_file(prev_buf,
1276                                                      1,
1277                                                      prev_read,
1278                                                      freq) == prev_read) {
1279                                         prev_posn += prev_read;
1280                                 } else {
1281                                         prev_read = -1;
1282                                 }
1283                         }
1284                 } while (prev_read > 0);
1285                 close(prevlocal);
1286         }
1287         unlink_or_warn(prevfile);
1288
1289         /*
1290          * Reset inflate/SHA1 if there was an error reading the previous temp
1291          * file; also rewind to the beginning of the local file.
1292          */
1293         if (prev_read == -1) {
1294                 memset(&freq->stream, 0, sizeof(freq->stream));
1295                 git_inflate_init(&freq->stream);
1296                 git_SHA1_Init(&freq->c);
1297                 if (prev_posn>0) {
1298                         prev_posn = 0;
1299                         lseek(freq->localfile, 0, SEEK_SET);
1300                         if (ftruncate(freq->localfile, 0) < 0) {
1301                                 error("Couldn't truncate temporary file %s: %s",
1302                                           freq->tmpfile, strerror(errno));
1303                                 goto abort;
1304                         }
1305                 }
1306         }
1307
1308         freq->slot = get_active_slot();
1309
1310         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1311         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1312         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1313         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1314         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1315
1316         /*
1317          * If we have successfully processed data from a previous fetch
1318          * attempt, only fetch the data we don't already have.
1319          */
1320         if (prev_posn>0) {
1321                 if (http_is_verbose)
1322                         fprintf(stderr,
1323                                 "Resuming fetch of object %s at byte %ld\n",
1324                                 hex, prev_posn);
1325                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1326                 range_header = curl_slist_append(range_header, range);
1327                 curl_easy_setopt(freq->slot->curl,
1328                                  CURLOPT_HTTPHEADER, range_header);
1329         }
1330
1331         return freq;
1332
1333 abort:
1334         free(freq->url);
1335         free(freq);
1336         return NULL;
1337 }
1338
1339 void process_http_object_request(struct http_object_request *freq)
1340 {
1341         if (freq->slot == NULL)
1342                 return;
1343         freq->curl_result = freq->slot->curl_result;
1344         freq->http_code = freq->slot->http_code;
1345         freq->slot = NULL;
1346 }
1347
1348 int finish_http_object_request(struct http_object_request *freq)
1349 {
1350         struct stat st;
1351
1352         close(freq->localfile);
1353         freq->localfile = -1;
1354
1355         process_http_object_request(freq);
1356
1357         if (freq->http_code == 416) {
1358                 warning("requested range invalid; we may already have all the data.");
1359         } else if (freq->curl_result != CURLE_OK) {
1360                 if (stat(freq->tmpfile, &st) == 0)
1361                         if (st.st_size == 0)
1362                                 unlink_or_warn(freq->tmpfile);
1363                 return -1;
1364         }
1365
1366         git_inflate_end(&freq->stream);
1367         git_SHA1_Final(freq->real_sha1, &freq->c);
1368         if (freq->zret != Z_STREAM_END) {
1369                 unlink_or_warn(freq->tmpfile);
1370                 return -1;
1371         }
1372         if (hashcmp(freq->sha1, freq->real_sha1)) {
1373                 unlink_or_warn(freq->tmpfile);
1374                 return -1;
1375         }
1376         freq->rename =
1377                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1378
1379         return freq->rename;
1380 }
1381
1382 void abort_http_object_request(struct http_object_request *freq)
1383 {
1384         unlink_or_warn(freq->tmpfile);
1385
1386         release_http_object_request(freq);
1387 }
1388
1389 void release_http_object_request(struct http_object_request *freq)
1390 {
1391         if (freq->localfile != -1) {
1392                 close(freq->localfile);
1393                 freq->localfile = -1;
1394         }
1395         if (freq->url != NULL) {
1396                 free(freq->url);
1397                 freq->url = NULL;
1398         }
1399         if (freq->slot != NULL) {
1400                 freq->slot->callback_func = NULL;
1401                 freq->slot->callback_data = NULL;
1402                 release_active_slot(freq->slot);
1403                 freq->slot = NULL;
1404         }
1405 }