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 active_requests;
   8 int http_is_verbose;
   9 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  10
  11 #if LIBCURL_VERSION_NUM >= 0x070a06
  12 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  13 #endif
  14
  15 static int min_curl_sessions = 1;
  16 static int curl_session_count;
  17 #ifdef USE_CURL_MULTI
  18 static int max_requests = -1;
  19 static CURLM *curlm;
  20 #endif
  21 #ifndef NO_CURL_EASY_DUPHANDLE
  22 static CURL *curl_default;
  23 #endif
  24
  25 #define PREV_BUF_SIZE 4096
  26 #define RANGE_HEADER_SIZE 30
  27
  28 char curl_errorstr[CURL_ERROR_SIZE];
  29
  30 static int curl_ssl_verify = -1;
  31 static const char *ssl_cert;
  32 #if LIBCURL_VERSION_NUM >= 0x070903
  33 static const char *ssl_key;
  34 #endif
  35 #if LIBCURL_VERSION_NUM >= 0x070908
  36 static const char *ssl_capath;
  37 #endif
  38 static const char *ssl_cainfo;
  39 static long curl_low_speed_limit = -1;
  40 static long curl_low_speed_time = -1;
  41 static int curl_ftp_no_epsv;
  42 static const char *curl_http_proxy;
  43 static char *user_name, *user_pass;
  44 static const char *user_agent;
  45
  46 #if LIBCURL_VERSION_NUM >= 0x071700
  47 /* Use CURLOPT_KEYPASSWD as is */
  48 #elif LIBCURL_VERSION_NUM >= 0x070903
  49 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  50 #else
  51 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  52 #endif
  53
  54 static char *ssl_cert_password;
  55 static int ssl_cert_password_required;
  56
  57 static struct curl_slist *pragma_header;
  58 static struct curl_slist *no_pragma_header;
  59
  60 static struct active_request_slot *active_queue_head;
  61
  62 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  63 {
  64         size_t size = eltsize * nmemb;
  65         struct buffer *buffer = buffer_;
  66
  67         if (size > buffer->buf.len - buffer->posn)
  68                 size = buffer->buf.len - buffer->posn;
  69         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  70         buffer->posn += size;
  71
  72         return size;
  73 }
  74
  75 #ifndef NO_CURL_IOCTL
  76 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  77 {
  78         struct buffer *buffer = clientp;
  79
  80         switch (cmd) {
  81         case CURLIOCMD_NOP:
  82                 return CURLIOE_OK;
  83
  84         case CURLIOCMD_RESTARTREAD:
  85                 buffer->posn = 0;
  86                 return CURLIOE_OK;
  87
  88         default:
  89                 return CURLIOE_UNKNOWNCMD;
  90         }
  91 }
  92 #endif
  93
  94 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  95 {
  96         size_t size = eltsize * nmemb;
  97         struct strbuf *buffer = buffer_;
  98
  99         strbuf_add(buffer, ptr, size);
 100         return size;
 101 }
 102
 103 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 104 {
 105         return eltsize * nmemb;
 106 }
 107
 108 #ifdef USE_CURL_MULTI
 109 static void process_curl_messages(void)
 110 {
 111         int num_messages;
 112         struct active_request_slot *slot;
 113         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 114
 115         while (curl_message != NULL) {
 116                 if (curl_message->msg == CURLMSG_DONE) {
 117                         int curl_result = curl_message->data.result;
 118                         slot = active_queue_head;
 119                         while (slot != NULL &&
 120                                slot->curl != curl_message->easy_handle)
 121                                 slot = slot->next;
 122                         if (slot != NULL) {
 123                                 curl_multi_remove_handle(curlm, slot->curl);
 124                                 slot->curl_result = curl_result;
 125                                 finish_active_slot(slot);
 126                         } else {
 127                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 128                         }
 129                 } else {
 130                         fprintf(stderr, "Unknown CURL message received: %d\n",
 131                                 (int)curl_message->msg);
 132                 }
 133                 curl_message = curl_multi_info_read(curlm, &num_messages);
 134         }
 135 }
 136 #endif
 137
 138 static int http_options(const char *var, const char *value, void *cb)
 139 {
 140         if (!strcmp("http.sslverify", var)) {
 141                 curl_ssl_verify = git_config_bool(var, value);
 142                 return 0;
 143         }
 144         if (!strcmp("http.sslcert", var))
 145                 return git_config_string(&ssl_cert, var, value);
 146 #if LIBCURL_VERSION_NUM >= 0x070903
 147         if (!strcmp("http.sslkey", var))
 148                 return git_config_string(&ssl_key, var, value);
 149 #endif
 150 #if LIBCURL_VERSION_NUM >= 0x070908
 151         if (!strcmp("http.sslcapath", var))
 152                 return git_config_string(&ssl_capath, var, value);
 153 #endif
 154         if (!strcmp("http.sslcainfo", var))
 155                 return git_config_string(&ssl_cainfo, var, value);
 156         if (!strcmp("http.sslcertpasswordprotected", var)) {
 157                 if (git_config_bool(var, value))
 158                         ssl_cert_password_required = 1;
 159                 return 0;
 160         }
 161         if (!strcmp("http.minsessions", var)) {
 162                 min_curl_sessions = git_config_int(var, value);
 163 #ifndef USE_CURL_MULTI
 164                 if (min_curl_sessions > 1)
 165                         min_curl_sessions = 1;
 166 #endif
 167                 return 0;
 168         }
 169 #ifdef USE_CURL_MULTI
 170         if (!strcmp("http.maxrequests", var)) {
 171                 max_requests = git_config_int(var, value);
 172                 return 0;
 173         }
 174 #endif
 175         if (!strcmp("http.lowspeedlimit", var)) {
 176                 curl_low_speed_limit = (long)git_config_int(var, value);
 177                 return 0;
 178         }
 179         if (!strcmp("http.lowspeedtime", var)) {
 180                 curl_low_speed_time = (long)git_config_int(var, value);
 181                 return 0;
 182         }
 183
 184         if (!strcmp("http.noepsv", var)) {
 185                 curl_ftp_no_epsv = git_config_bool(var, value);
 186                 return 0;
 187         }
 188         if (!strcmp("http.proxy", var))
 189                 return git_config_string(&curl_http_proxy, var, value);
 190
 191         if (!strcmp("http.postbuffer", var)) {
 192                 http_post_buffer = git_config_int(var, value);
 193                 if (http_post_buffer < LARGE_PACKET_MAX)
 194                         http_post_buffer = LARGE_PACKET_MAX;
 195                 return 0;
 196         }
 197
 198         if (!strcmp("http.useragent", var))
 199                 return git_config_string(&user_agent, var, value);
 200
 201         /* Fall back on the default ones */
 202         return git_default_config(var, value, cb);
 203 }
 204
 205 static void init_curl_http_auth(CURL *result)
 206 {
 207         if (user_name) {
 208                 struct strbuf up = STRBUF_INIT;
 209                 if (!user_pass)
 210                         user_pass = xstrdup(git_getpass("Password: "));
 211                 strbuf_addf(&up, "%s:%s", user_name, user_pass);
 212                 curl_easy_setopt(result, CURLOPT_USERPWD,
 213                                  strbuf_detach(&up, NULL));
 214         }
 215 }
 216
 217 static int has_cert_password(void)
 218 {
 219         if (ssl_cert_password != NULL)
 220                 return 1;
 221         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 222                 return 0;
 223         /* Only prompt the user once. */
 224         ssl_cert_password_required = -1;
 225         ssl_cert_password = git_getpass("Certificate Password: ");
 226         if (ssl_cert_password != NULL) {
 227                 ssl_cert_password = xstrdup(ssl_cert_password);
 228                 return 1;
 229         } else
 230                 return 0;
 231 }
 232
 233 static CURL *get_curl_handle(void)
 234 {
 235         CURL *result = curl_easy_init();
 236
 237         if (!curl_ssl_verify) {
 238                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 239                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 240         } else {
 241                 /* Verify authenticity of the peer's certificate */
 242                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 243                 /* The name in the cert must match whom we tried to connect */
 244                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 245         }
 246
 247 #if LIBCURL_VERSION_NUM >= 0x070907
 248         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 249 #endif
 250 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 251         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 252 #endif
 253
 254         init_curl_http_auth(result);
 255
 256         if (ssl_cert != NULL)
 257                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 258         if (has_cert_password())
 259                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 260 #if LIBCURL_VERSION_NUM >= 0x070903
 261         if (ssl_key != NULL)
 262                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 263 #endif
 264 #if LIBCURL_VERSION_NUM >= 0x070908
 265         if (ssl_capath != NULL)
 266                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 267 #endif
 268         if (ssl_cainfo != NULL)
 269                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 270         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 271
 272         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 273                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 274                                  curl_low_speed_limit);
 275                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 276                                  curl_low_speed_time);
 277         }
 278
 279         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 280 #if LIBCURL_VERSION_NUM >= 0x071301
 281         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 282 #elif LIBCURL_VERSION_NUM >= 0x071101
 283         curl_easy_setopt(result, CURLOPT_POST301, 1);
 284 #endif
 285
 286         if (getenv("GIT_CURL_VERBOSE"))
 287                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 288
 289         curl_easy_setopt(result, CURLOPT_USERAGENT,
 290                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 291
 292         if (curl_ftp_no_epsv)
 293                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 294
 295         if (curl_http_proxy)
 296                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 297
 298         return result;
 299 }
 300
 301 static void http_auth_init(const char *url)
 302 {
 303         char *at, *colon, *cp, *slash, *decoded;
 304         int len;
 305
 306         cp = strstr(url, "://");
 307         if (!cp)
 308                 return;
 309
 310         /*
 311          * Ok, the URL looks like "proto://something".  Which one?
 312          * "proto://<user>:<pass>@<host>/...",
 313          * "proto://<user>@<host>/...", or just
 314          * "proto://<host>/..."?
 315          */
 316         cp += 3;
 317         at = strchr(cp, '@');
 318         colon = strchr(cp, ':');
 319         slash = strchrnul(cp, '/');
 320         if (!at || slash <= at)
 321                 return; /* No credentials */
 322         if (!colon || at <= colon) {
 323                 /* Only username */
 324                 len = at - cp;
 325                 user_name = xmalloc(len + 1);
 326                 memcpy(user_name, cp, len);
 327                 user_name[len] = '\0';
 328                 decoded = url_decode(user_name);
 329                 free(user_name);
 330                 user_name = decoded;
 331                 user_pass = NULL;
 332         } else {
 333                 len = colon - cp;
 334                 user_name = xmalloc(len + 1);
 335                 memcpy(user_name, cp, len);
 336                 user_name[len] = '\0';
 337                 decoded = url_decode(user_name);
 338                 free(user_name);
 339                 user_name = decoded;
 340                 len = at - (colon + 1);
 341                 user_pass = xmalloc(len + 1);
 342                 memcpy(user_pass, colon + 1, len);
 343                 user_pass[len] = '\0';
 344                 decoded = url_decode(user_pass);
 345                 free(user_pass);
 346                 user_pass = decoded;
 347         }
 348 }
 349
 350 static void set_from_env(const char **var, const char *envname)
 351 {
 352         const char *val = getenv(envname);
 353         if (val)
 354                 *var = val;
 355 }
 356
 357 void http_init(struct remote *remote)
 358 {
 359         char *low_speed_limit;
 360         char *low_speed_time;
 361
 362         http_is_verbose = 0;
 363
 364         git_config(http_options, NULL);
 365
 366         curl_global_init(CURL_GLOBAL_ALL);
 367
 368         if (remote && remote->http_proxy)
 369                 curl_http_proxy = xstrdup(remote->http_proxy);
 370
 371         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 372         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 373
 374 #ifdef USE_CURL_MULTI
 375         {
 376                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 377                 if (http_max_requests != NULL)
 378                         max_requests = atoi(http_max_requests);
 379         }
 380
 381         curlm = curl_multi_init();
 382         if (curlm == NULL) {
 383                 fprintf(stderr, "Error creating curl multi handle.\n");
 384                 exit(1);
 385         }
 386 #endif
 387
 388         if (getenv("GIT_SSL_NO_VERIFY"))
 389                 curl_ssl_verify = 0;
 390
 391         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 392 #if LIBCURL_VERSION_NUM >= 0x070903
 393         set_from_env(&ssl_key, "GIT_SSL_KEY");
 394 #endif
 395 #if LIBCURL_VERSION_NUM >= 0x070908
 396         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 397 #endif
 398         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 399
 400         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 401
 402         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 403         if (low_speed_limit != NULL)
 404                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 405         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 406         if (low_speed_time != NULL)
 407                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 408
 409         if (curl_ssl_verify == -1)
 410                 curl_ssl_verify = 1;
 411
 412         curl_session_count = 0;
 413 #ifdef USE_CURL_MULTI
 414         if (max_requests < 1)
 415                 max_requests = DEFAULT_MAX_REQUESTS;
 416 #endif
 417
 418         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 419                 curl_ftp_no_epsv = 1;
 420
 421         if (remote && remote->url && remote->url[0]) {
 422                 http_auth_init(remote->url[0]);
 423                 if (!ssl_cert_password_required &&
 424                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 425                     !prefixcmp(remote->url[0], "https://"))
 426                         ssl_cert_password_required = 1;
 427         }
 428
 429 #ifndef NO_CURL_EASY_DUPHANDLE
 430         curl_default = get_curl_handle();
 431 #endif
 432 }
 433
 434 void http_cleanup(void)
 435 {
 436         struct active_request_slot *slot = active_queue_head;
 437
 438         while (slot != NULL) {
 439                 struct active_request_slot *next = slot->next;
 440                 if (slot->curl != NULL) {
 441 #ifdef USE_CURL_MULTI
 442                         curl_multi_remove_handle(curlm, slot->curl);
 443 #endif
 444                         curl_easy_cleanup(slot->curl);
 445                 }
 446                 free(slot);
 447                 slot = next;
 448         }
 449         active_queue_head = NULL;
 450
 451 #ifndef NO_CURL_EASY_DUPHANDLE
 452         curl_easy_cleanup(curl_default);
 453 #endif
 454
 455 #ifdef USE_CURL_MULTI
 456         curl_multi_cleanup(curlm);
 457 #endif
 458         curl_global_cleanup();
 459
 460         curl_slist_free_all(pragma_header);
 461         pragma_header = NULL;
 462
 463         curl_slist_free_all(no_pragma_header);
 464         no_pragma_header = NULL;
 465
 466         if (curl_http_proxy) {
 467                 free((void *)curl_http_proxy);
 468                 curl_http_proxy = NULL;
 469         }
 470
 471         if (ssl_cert_password != NULL) {
 472                 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 473                 free(ssl_cert_password);
 474                 ssl_cert_password = NULL;
 475         }
 476         ssl_cert_password_required = 0;
 477 }
 478
 479 struct active_request_slot *get_active_slot(void)
 480 {
 481         struct active_request_slot *slot = active_queue_head;
 482         struct active_request_slot *newslot;
 483
 484 #ifdef USE_CURL_MULTI
 485         int num_transfers;
 486
 487         /* Wait for a slot to open up if the queue is full */
 488         while (active_requests >= max_requests) {
 489                 curl_multi_perform(curlm, &num_transfers);
 490                 if (num_transfers < active_requests)
 491                         process_curl_messages();
 492         }
 493 #endif
 494
 495         while (slot != NULL && slot->in_use)
 496                 slot = slot->next;
 497
 498         if (slot == NULL) {
 499                 newslot = xmalloc(sizeof(*newslot));
 500                 newslot->curl = NULL;
 501                 newslot->in_use = 0;
 502                 newslot->next = NULL;
 503
 504                 slot = active_queue_head;
 505                 if (slot == NULL) {
 506                         active_queue_head = newslot;
 507                 } else {
 508                         while (slot->next != NULL)
 509                                 slot = slot->next;
 510                         slot->next = newslot;
 511                 }
 512                 slot = newslot;
 513         }
 514
 515         if (slot->curl == NULL) {
 516 #ifdef NO_CURL_EASY_DUPHANDLE
 517                 slot->curl = get_curl_handle();
 518 #else
 519                 slot->curl = curl_easy_duphandle(curl_default);
 520 #endif
 521                 curl_session_count++;
 522         }
 523
 524         active_requests++;
 525         slot->in_use = 1;
 526         slot->results = NULL;
 527         slot->finished = NULL;
 528         slot->callback_data = NULL;
 529         slot->callback_func = NULL;
 530         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 531         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 532         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 533         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 534         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 535         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 536         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 537         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 538
 539         return slot;
 540 }
 541
 542 int start_active_slot(struct active_request_slot *slot)
 543 {
 544 #ifdef USE_CURL_MULTI
 545         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 546         int num_transfers;
 547
 548         if (curlm_result != CURLM_OK &&
 549             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 550                 active_requests--;
 551                 slot->in_use = 0;
 552                 return 0;
 553         }
 554
 555         /*
 556          * We know there must be something to do, since we just added
 557          * something.
 558          */
 559         curl_multi_perform(curlm, &num_transfers);
 560 #endif
 561         return 1;
 562 }
 563
 564 #ifdef USE_CURL_MULTI
 565 struct fill_chain {
 566         void *data;
 567         int (*fill)(void *);
 568         struct fill_chain *next;
 569 };
 570
 571 static struct fill_chain *fill_cfg;
 572
 573 void add_fill_function(void *data, int (*fill)(void *))
 574 {
 575         struct fill_chain *new = xmalloc(sizeof(*new));
 576         struct fill_chain **linkp = &fill_cfg;
 577         new->data = data;
 578         new->fill = fill;
 579         new->next = NULL;
 580         while (*linkp)
 581                 linkp = &(*linkp)->next;
 582         *linkp = new;
 583 }
 584
 585 void fill_active_slots(void)
 586 {
 587         struct active_request_slot *slot = active_queue_head;
 588
 589         while (active_requests < max_requests) {
 590                 struct fill_chain *fill;
 591                 for (fill = fill_cfg; fill; fill = fill->next)
 592                         if (fill->fill(fill->data))
 593                                 break;
 594
 595                 if (!fill)
 596                         break;
 597         }
 598
 599         while (slot != NULL) {
 600                 if (!slot->in_use && slot->curl != NULL
 601                         && curl_session_count > min_curl_sessions) {
 602                         curl_easy_cleanup(slot->curl);
 603                         slot->curl = NULL;
 604                         curl_session_count--;
 605                 }
 606                 slot = slot->next;
 607         }
 608 }
 609
 610 void step_active_slots(void)
 611 {
 612         int num_transfers;
 613         CURLMcode curlm_result;
 614
 615         do {
 616                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 617         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 618         if (num_transfers < active_requests) {
 619                 process_curl_messages();
 620                 fill_active_slots();
 621         }
 622 }
 623 #endif
 624
 625 void run_active_slot(struct active_request_slot *slot)
 626 {
 627 #ifdef USE_CURL_MULTI
 628         fd_set readfds;
 629         fd_set writefds;
 630         fd_set excfds;
 631         int max_fd;
 632         struct timeval select_timeout;
 633         int finished = 0;
 634
 635         slot->finished = &finished;
 636         while (!finished) {
 637                 step_active_slots();
 638
 639                 if (slot->in_use) {
 640 #if LIBCURL_VERSION_NUM >= 0x070f04
 641                         long curl_timeout;
 642                         curl_multi_timeout(curlm, &curl_timeout);
 643                         if (curl_timeout == 0) {
 644                                 continue;
 645                         } else if (curl_timeout == -1) {
 646                                 select_timeout.tv_sec  = 0;
 647                                 select_timeout.tv_usec = 50000;
 648                         } else {
 649                                 select_timeout.tv_sec  =  curl_timeout / 1000;
 650                                 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 651                         }
 652 #else
 653                         select_timeout.tv_sec  = 0;
 654                         select_timeout.tv_usec = 50000;
 655 #endif
 656
 657                         max_fd = -1;
 658                         FD_ZERO(&readfds);
 659                         FD_ZERO(&writefds);
 660                         FD_ZERO(&excfds);
 661                         curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 662
 663                         select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 664                 }
 665         }
 666 #else
 667         while (slot->in_use) {
 668                 slot->curl_result = curl_easy_perform(slot->curl);
 669                 finish_active_slot(slot);
 670         }
 671 #endif
 672 }
 673
 674 static void closedown_active_slot(struct active_request_slot *slot)
 675 {
 676         active_requests--;
 677         slot->in_use = 0;
 678 }
 679
 680 static void release_active_slot(struct active_request_slot *slot)
 681 {
 682         closedown_active_slot(slot);
 683         if (slot->curl && curl_session_count > min_curl_sessions) {
 684 #ifdef USE_CURL_MULTI
 685                 curl_multi_remove_handle(curlm, slot->curl);
 686 #endif
 687                 curl_easy_cleanup(slot->curl);
 688                 slot->curl = NULL;
 689                 curl_session_count--;
 690         }
 691 #ifdef USE_CURL_MULTI
 692         fill_active_slots();
 693 #endif
 694 }
 695
 696 void finish_active_slot(struct active_request_slot *slot)
 697 {
 698         closedown_active_slot(slot);
 699         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 700
 701         if (slot->finished != NULL)
 702                 (*slot->finished) = 1;
 703
 704         /* Store slot results so they can be read after the slot is reused */
 705         if (slot->results != NULL) {
 706                 slot->results->curl_result = slot->curl_result;
 707                 slot->results->http_code = slot->http_code;
 708         }
 709
 710         /* Run callback if appropriate */
 711         if (slot->callback_func != NULL)
 712                 slot->callback_func(slot->callback_data);
 713 }
 714
 715 void finish_all_active_slots(void)
 716 {
 717         struct active_request_slot *slot = active_queue_head;
 718
 719         while (slot != NULL)
 720                 if (slot->in_use) {
 721                         run_active_slot(slot);
 722                         slot = active_queue_head;
 723                 } else {
 724                         slot = slot->next;
 725                 }
 726 }
 727
 728 /* Helpers for modifying and creating URLs */
 729 static inline int needs_quote(int ch)
 730 {
 731         if (((ch >= 'A') && (ch <= 'Z'))
 732                         || ((ch >= 'a') && (ch <= 'z'))
 733                         || ((ch >= '0') && (ch <= '9'))
 734                         || (ch == '/')
 735                         || (ch == '-')
 736                         || (ch == '.'))
 737                 return 0;
 738         return 1;
 739 }
 740
 741 static inline int hex(int v)
 742 {
 743         if (v < 10)
 744                 return '0' + v;
 745         else
 746                 return 'A' + v - 10;
 747 }
 748
 749 static char *quote_ref_url(const char *base, const char *ref)
 750 {
 751         struct strbuf buf = STRBUF_INIT;
 752         const char *cp;
 753         int ch;
 754
 755         end_url_with_slash(&buf, base);
 756
 757         for (cp = ref; (ch = *cp) != 0; cp++)
 758                 if (needs_quote(ch))
 759                         strbuf_addf(&buf, "%%%02x", ch);
 760                 else
 761                         strbuf_addch(&buf, *cp);
 762
 763         return strbuf_detach(&buf, NULL);
 764 }
 765
 766 void append_remote_object_url(struct strbuf *buf, const char *url,
 767                               const char *hex,
 768                               int only_two_digit_prefix)
 769 {
 770         end_url_with_slash(buf, url);
 771
 772         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 773         if (!only_two_digit_prefix)
 774                 strbuf_addf(buf, "%s", hex+2);
 775 }
 776
 777 char *get_remote_object_url(const char *url, const char *hex,
 778                             int only_two_digit_prefix)
 779 {
 780         struct strbuf buf = STRBUF_INIT;
 781         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 782         return strbuf_detach(&buf, NULL);
 783 }
 784
 785 /* http_request() targets */
 786 #define HTTP_REQUEST_STRBUF     0
 787 #define HTTP_REQUEST_FILE       1
 788
 789 static int http_request(const char *url, void *result, int target, int options)
 790 {
 791         struct active_request_slot *slot;
 792         struct slot_results results;
 793         struct curl_slist *headers = NULL;
 794         struct strbuf buf = STRBUF_INIT;
 795         int ret;
 796
 797         slot = get_active_slot();
 798         slot->results = &results;
 799         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 800
 801         if (result == NULL) {
 802                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 803         } else {
 804                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 805                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 806
 807                 if (target == HTTP_REQUEST_FILE) {
 808                         long posn = ftell(result);
 809                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 810                                          fwrite);
 811                         if (posn > 0) {
 812                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 813                                 headers = curl_slist_append(headers, buf.buf);
 814                                 strbuf_reset(&buf);
 815                         }
 816                 } else
 817                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 818                                          fwrite_buffer);
 819         }
 820
 821         strbuf_addstr(&buf, "Pragma:");
 822         if (options & HTTP_NO_CACHE)
 823                 strbuf_addstr(&buf, " no-cache");
 824
 825         headers = curl_slist_append(headers, buf.buf);
 826
 827         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 828         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 829
 830         if (start_active_slot(slot)) {
 831                 run_active_slot(slot);
 832                 if (results.curl_result == CURLE_OK)
 833                         ret = HTTP_OK;
 834                 else if (missing_target(&results))
 835                         ret = HTTP_MISSING_TARGET;
 836                 else if (results.http_code == 401) {
 837                         if (user_name) {
 838                                 ret = HTTP_NOAUTH;
 839                         } else {
 840                                 /*
 841                                  * git_getpass is needed here because its very likely stdin/stdout are
 842                                  * pipes to our parent process.  So we instead need to use /dev/tty,
 843                                  * but that is non-portable.  Using git_getpass() can at least be stubbed
 844                                  * on other platforms with a different implementation if/when necessary.
 845                                  */
 846                                 user_name = xstrdup(git_getpass("Username: "));
 847                                 init_curl_http_auth(slot->curl);
 848                                 ret = HTTP_REAUTH;
 849                         }
 850                 } else
 851                         ret = HTTP_ERROR;
 852         } else {
 853                 error("Unable to start HTTP request for %s", url);
 854                 ret = HTTP_START_FAILED;
 855         }
 856
 857         curl_slist_free_all(headers);
 858         strbuf_release(&buf);
 859
 860         return ret;
 861 }
 862
 863 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 864 {
 865         int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 866         if (http_ret == HTTP_REAUTH) {
 867                 http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 868         }
 869         return http_ret;
 870 }
 871
 872 /*
 873  * Downloads an url and stores the result in the given file.
 874  *
 875  * If a previous interrupted download is detected (i.e. a previous temporary
 876  * file is still around) the download is resumed.
 877  */
 878 static int http_get_file(const char *url, const char *filename, int options)
 879 {
 880         int ret;
 881         struct strbuf tmpfile = STRBUF_INIT;
 882         FILE *result;
 883
 884         strbuf_addf(&tmpfile, "%s.temp", filename);
 885         result = fopen(tmpfile.buf, "a");
 886         if (! result) {
 887                 error("Unable to open local file %s", tmpfile.buf);
 888                 ret = HTTP_ERROR;
 889                 goto cleanup;
 890         }
 891
 892         ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 893         fclose(result);
 894
 895         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 896                 ret = HTTP_ERROR;
 897 cleanup:
 898         strbuf_release(&tmpfile);
 899         return ret;
 900 }
 901
 902 int http_error(const char *url, int ret)
 903 {
 904         /* http_request has already handled HTTP_START_FAILED. */
 905         if (ret != HTTP_START_FAILED)
 906                 error("%s while accessing %s\n", curl_errorstr, url);
 907
 908         return ret;
 909 }
 910
 911 int http_fetch_ref(const char *base, struct ref *ref)
 912 {
 913         char *url;
 914         struct strbuf buffer = STRBUF_INIT;
 915         int ret = -1;
 916
 917         url = quote_ref_url(base, ref->name);
 918         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 919                 strbuf_rtrim(&buffer);
 920                 if (buffer.len == 40)
 921                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 922                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 923                         ref->symref = xstrdup(buffer.buf + 5);
 924                         ret = 0;
 925                 }
 926         }
 927
 928         strbuf_release(&buffer);
 929         free(url);
 930         return ret;
 931 }
 932
 933 /* Helpers for fetching packs */
 934 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 935 {
 936         char *url, *tmp;
 937         struct strbuf buf = STRBUF_INIT;
 938
 939         if (http_is_verbose)
 940                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 941
 942         end_url_with_slash(&buf, base_url);
 943         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 944         url = strbuf_detach(&buf, NULL);
 945
 946         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 947         tmp = strbuf_detach(&buf, NULL);
 948
 949         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 950                 error("Unable to get pack index %s\n", url);
 951                 free(tmp);
 952                 tmp = NULL;
 953         }
 954
 955         free(url);
 956         return tmp;
 957 }
 958
 959 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 960         unsigned char *sha1, const char *base_url)
 961 {
 962         struct packed_git *new_pack;
 963         char *tmp_idx = NULL;
 964         int ret;
 965
 966         if (has_pack_index(sha1)) {
 967                 new_pack = parse_pack_index(sha1, NULL);
 968                 if (!new_pack)
 969                         return -1; /* parse_pack_index() already issued error message */
 970                 goto add_pack;
 971         }
 972
 973         tmp_idx = fetch_pack_index(sha1, base_url);
 974         if (!tmp_idx)
 975                 return -1;
 976
 977         new_pack = parse_pack_index(sha1, tmp_idx);
 978         if (!new_pack) {
 979                 unlink(tmp_idx);
 980                 free(tmp_idx);
 981
 982                 return -1; /* parse_pack_index() already issued error message */
 983         }
 984
 985         ret = verify_pack_index(new_pack);
 986         if (!ret) {
 987                 close_pack_index(new_pack);
 988                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 989         }
 990         free(tmp_idx);
 991         if (ret)
 992                 return -1;
 993
 994 add_pack:
 995         new_pack->next = *packs_head;
 996         *packs_head = new_pack;
 997         return 0;
 998 }
 999
1000 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1001 {
1002         int ret = 0, i = 0;
1003         char *url, *data;
1004         struct strbuf buf = STRBUF_INIT;
1005         unsigned char sha1[20];
1006
1007         end_url_with_slash(&buf, base_url);
1008         strbuf_addstr(&buf, "objects/info/packs");
1009         url = strbuf_detach(&buf, NULL);
1010
1011         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1012         if (ret != HTTP_OK)
1013                 goto cleanup;
1014
1015         data = buf.buf;
1016         while (i < buf.len) {
1017                 switch (data[i]) {
1018                 case 'P':
1019                         i++;
1020                         if (i + 52 <= buf.len &&
1021                             !prefixcmp(data + i, " pack-") &&
1022                             !prefixcmp(data + i + 46, ".pack\n")) {
1023                                 get_sha1_hex(data + i + 6, sha1);
1024                                 fetch_and_setup_pack_index(packs_head, sha1,
1025                                                       base_url);
1026                                 i += 51;
1027                                 break;
1028                         }
1029                 default:
1030                         while (i < buf.len && data[i] != '\n')
1031                                 i++;
1032                 }
1033                 i++;
1034         }
1035
1036 cleanup:
1037         free(url);
1038         return ret;
1039 }
1040
1041 void release_http_pack_request(struct http_pack_request *preq)
1042 {
1043         if (preq->packfile != NULL) {
1044                 fclose(preq->packfile);
1045                 preq->packfile = NULL;
1046         }
1047         if (preq->range_header != NULL) {
1048                 curl_slist_free_all(preq->range_header);
1049                 preq->range_header = NULL;
1050         }
1051         preq->slot = NULL;
1052         free(preq->url);
1053 }
1054
1055 int finish_http_pack_request(struct http_pack_request *preq)
1056 {
1057         struct packed_git **lst;
1058         struct packed_git *p = preq->target;
1059         char *tmp_idx;
1060         struct child_process ip;
1061         const char *ip_argv[8];
1062
1063         close_pack_index(p);
1064
1065         fclose(preq->packfile);
1066         preq->packfile = NULL;
1067
1068         lst = preq->lst;
1069         while (*lst != p)
1070                 lst = &((*lst)->next);
1071         *lst = (*lst)->next;
1072
1073         tmp_idx = xstrdup(preq->tmpfile);
1074         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1075                ".idx.temp");
1076
1077         ip_argv[0] = "index-pack";
1078         ip_argv[1] = "-o";
1079         ip_argv[2] = tmp_idx;
1080         ip_argv[3] = preq->tmpfile;
1081         ip_argv[4] = NULL;
1082
1083         memset(&ip, 0, sizeof(ip));
1084         ip.argv = ip_argv;
1085         ip.git_cmd = 1;
1086         ip.no_stdin = 1;
1087         ip.no_stdout = 1;
1088
1089         if (run_command(&ip)) {
1090                 unlink(preq->tmpfile);
1091                 unlink(tmp_idx);
1092                 free(tmp_idx);
1093                 return -1;
1094         }
1095
1096         unlink(sha1_pack_index_name(p->sha1));
1097
1098         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1099          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1100                 free(tmp_idx);
1101                 return -1;
1102         }
1103
1104         install_packed_git(p);
1105         free(tmp_idx);
1106         return 0;
1107 }
1108
1109 struct http_pack_request *new_http_pack_request(
1110         struct packed_git *target, const char *base_url)
1111 {
1112         long prev_posn = 0;
1113         char range[RANGE_HEADER_SIZE];
1114         struct strbuf buf = STRBUF_INIT;
1115         struct http_pack_request *preq;
1116
1117         preq = xmalloc(sizeof(*preq));
1118         preq->target = target;
1119         preq->range_header = NULL;
1120
1121         end_url_with_slash(&buf, base_url);
1122         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1123                 sha1_to_hex(target->sha1));
1124         preq->url = strbuf_detach(&buf, NULL);
1125
1126         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1127                 sha1_pack_name(target->sha1));
1128         preq->packfile = fopen(preq->tmpfile, "a");
1129         if (!preq->packfile) {
1130                 error("Unable to open local file %s for pack",
1131                       preq->tmpfile);
1132                 goto abort;
1133         }
1134
1135         preq->slot = get_active_slot();
1136         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1137         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1138         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1139         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1140                 no_pragma_header);
1141
1142         /*
1143          * If there is data present from a previous transfer attempt,
1144          * resume where it left off
1145          */
1146         prev_posn = ftell(preq->packfile);
1147         if (prev_posn>0) {
1148                 if (http_is_verbose)
1149                         fprintf(stderr,
1150                                 "Resuming fetch of pack %s at byte %ld\n",
1151                                 sha1_to_hex(target->sha1), prev_posn);
1152                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1153                 preq->range_header = curl_slist_append(NULL, range);
1154                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1155                         preq->range_header);
1156         }
1157
1158         return preq;
1159
1160 abort:
1161         free(preq->url);
1162         free(preq);
1163         return NULL;
1164 }
1165
1166 /* Helpers for fetching objects (loose) */
1167 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1168                                void *data)
1169 {
1170         unsigned char expn[4096];
1171         size_t size = eltsize * nmemb;
1172         int posn = 0;
1173         struct http_object_request *freq =
1174                 (struct http_object_request *)data;
1175         do {
1176                 ssize_t retval = xwrite(freq->localfile,
1177                                         (char *) ptr + posn, size - posn);
1178                 if (retval < 0)
1179                         return posn;
1180                 posn += retval;
1181         } while (posn < size);
1182
1183         freq->stream.avail_in = size;
1184         freq->stream.next_in = (void *)ptr;
1185         do {
1186                 freq->stream.next_out = expn;
1187                 freq->stream.avail_out = sizeof(expn);
1188                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1189                 git_SHA1_Update(&freq->c, expn,
1190                                 sizeof(expn) - freq->stream.avail_out);
1191         } while (freq->stream.avail_in && freq->zret == Z_OK);
1192         return size;
1193 }
1194
1195 struct http_object_request *new_http_object_request(const char *base_url,
1196         unsigned char *sha1)
1197 {
1198         char *hex = sha1_to_hex(sha1);
1199         char *filename;
1200         char prevfile[PATH_MAX];
1201         int prevlocal;
1202         char prev_buf[PREV_BUF_SIZE];
1203         ssize_t prev_read = 0;
1204         long prev_posn = 0;
1205         char range[RANGE_HEADER_SIZE];
1206         struct curl_slist *range_header = NULL;
1207         struct http_object_request *freq;
1208
1209         freq = xmalloc(sizeof(*freq));
1210         hashcpy(freq->sha1, sha1);
1211         freq->localfile = -1;
1212
1213         filename = sha1_file_name(sha1);
1214         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1215                  "%s.temp", filename);
1216
1217         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1218         unlink_or_warn(prevfile);
1219         rename(freq->tmpfile, prevfile);
1220         unlink_or_warn(freq->tmpfile);
1221
1222         if (freq->localfile != -1)
1223                 error("fd leakage in start: %d", freq->localfile);
1224         freq->localfile = open(freq->tmpfile,
1225                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1226         /*
1227          * This could have failed due to the "lazy directory creation";
1228          * try to mkdir the last path component.
1229          */
1230         if (freq->localfile < 0 && errno == ENOENT) {
1231                 char *dir = strrchr(freq->tmpfile, '/');
1232                 if (dir) {
1233                         *dir = 0;
1234                         mkdir(freq->tmpfile, 0777);
1235                         *dir = '/';
1236                 }
1237                 freq->localfile = open(freq->tmpfile,
1238                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1239         }
1240
1241         if (freq->localfile < 0) {
1242                 error("Couldn't create temporary file %s: %s",
1243                       freq->tmpfile, strerror(errno));
1244                 goto abort;
1245         }
1246
1247         memset(&freq->stream, 0, sizeof(freq->stream));
1248
1249         git_inflate_init(&freq->stream);
1250
1251         git_SHA1_Init(&freq->c);
1252
1253         freq->url = get_remote_object_url(base_url, hex, 0);
1254
1255         /*
1256          * If a previous temp file is present, process what was already
1257          * fetched.
1258          */
1259         prevlocal = open(prevfile, O_RDONLY);
1260         if (prevlocal != -1) {
1261                 do {
1262                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1263                         if (prev_read>0) {
1264                                 if (fwrite_sha1_file(prev_buf,
1265                                                      1,
1266                                                      prev_read,
1267                                                      freq) == prev_read) {
1268                                         prev_posn += prev_read;
1269                                 } else {
1270                                         prev_read = -1;
1271                                 }
1272                         }
1273                 } while (prev_read > 0);
1274                 close(prevlocal);
1275         }
1276         unlink_or_warn(prevfile);
1277
1278         /*
1279          * Reset inflate/SHA1 if there was an error reading the previous temp
1280          * file; also rewind to the beginning of the local file.
1281          */
1282         if (prev_read == -1) {
1283                 memset(&freq->stream, 0, sizeof(freq->stream));
1284                 git_inflate_init(&freq->stream);
1285                 git_SHA1_Init(&freq->c);
1286                 if (prev_posn>0) {
1287                         prev_posn = 0;
1288                         lseek(freq->localfile, 0, SEEK_SET);
1289                         if (ftruncate(freq->localfile, 0) < 0) {
1290                                 error("Couldn't truncate temporary file %s: %s",
1291                                           freq->tmpfile, strerror(errno));
1292                                 goto abort;
1293                         }
1294                 }
1295         }
1296
1297         freq->slot = get_active_slot();
1298
1299         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1300         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1301         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1302         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1303         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1304
1305         /*
1306          * If we have successfully processed data from a previous fetch
1307          * attempt, only fetch the data we don't already have.
1308          */
1309         if (prev_posn>0) {
1310                 if (http_is_verbose)
1311                         fprintf(stderr,
1312                                 "Resuming fetch of object %s at byte %ld\n",
1313                                 hex, prev_posn);
1314                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1315                 range_header = curl_slist_append(range_header, range);
1316                 curl_easy_setopt(freq->slot->curl,
1317                                  CURLOPT_HTTPHEADER, range_header);
1318         }
1319
1320         return freq;
1321
1322 abort:
1323         free(filename);
1324         free(freq->url);
1325         free(freq);
1326         return NULL;
1327 }
1328
1329 void process_http_object_request(struct http_object_request *freq)
1330 {
1331         if (freq->slot == NULL)
1332                 return;
1333         freq->curl_result = freq->slot->curl_result;
1334         freq->http_code = freq->slot->http_code;
1335         freq->slot = NULL;
1336 }
1337
1338 int finish_http_object_request(struct http_object_request *freq)
1339 {
1340         struct stat st;
1341
1342         close(freq->localfile);
1343         freq->localfile = -1;
1344
1345         process_http_object_request(freq);
1346
1347         if (freq->http_code == 416) {
1348                 warning("requested range invalid; we may already have all the data.");
1349         } else if (freq->curl_result != CURLE_OK) {
1350                 if (stat(freq->tmpfile, &st) == 0)
1351                         if (st.st_size == 0)
1352                                 unlink_or_warn(freq->tmpfile);
1353                 return -1;
1354         }
1355
1356         git_inflate_end(&freq->stream);
1357         git_SHA1_Final(freq->real_sha1, &freq->c);
1358         if (freq->zret != Z_STREAM_END) {
1359                 unlink_or_warn(freq->tmpfile);
1360                 return -1;
1361         }
1362         if (hashcmp(freq->sha1, freq->real_sha1)) {
1363                 unlink_or_warn(freq->tmpfile);
1364                 return -1;
1365         }
1366         freq->rename =
1367                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1368
1369         return freq->rename;
1370 }
1371
1372 void abort_http_object_request(struct http_object_request *freq)
1373 {
1374         unlink_or_warn(freq->tmpfile);
1375
1376         release_http_object_request(freq);
1377 }
1378
1379 void release_http_object_request(struct http_object_request *freq)
1380 {
1381         if (freq->localfile != -1) {
1382                 close(freq->localfile);
1383                 freq->localfile = -1;
1384         }
1385         if (freq->url != NULL) {
1386                 free(freq->url);
1387                 freq->url = NULL;
1388         }
1389         if (freq->slot != NULL) {
1390                 freq->slot->callback_func = NULL;
1391                 freq->slot->callback_data = NULL;
1392                 release_active_slot(freq->slot);
1393                 freq->slot = NULL;
1394         }
1395 }