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, *description;
  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 char *git_getpass_with_description(const char *what, const char *desc)
 143 {
 144         struct strbuf prompt = STRBUF_INIT;
 145         char *r;
 146
 147         if (desc)
 148                 strbuf_addf(&prompt, "%s for '%s': ", what, desc);
 149         else
 150                 strbuf_addf(&prompt, "%s: ", what);
 151         /*
 152          * NEEDSWORK: for usernames, we should do something less magical that
 153          * actually echoes the characters. However, we need to read from
 154          * /dev/tty and not stdio, which is not portable (but getpass will do
 155          * it for us). http.c uses the same workaround.
 156          */
 157         r = git_getpass(prompt.buf);
 158
 159         strbuf_release(&prompt);
 160         return xstrdup(r);
 161 }
 162
 163 static int http_options(const char *var, const char *value, void *cb)
 164 {
 165         if (!strcmp("http.sslverify", var)) {
 166                 curl_ssl_verify = git_config_bool(var, value);
 167                 return 0;
 168         }
 169         if (!strcmp("http.sslcert", var))
 170                 return git_config_string(&ssl_cert, var, value);
 171 #if LIBCURL_VERSION_NUM >= 0x070903
 172         if (!strcmp("http.sslkey", var))
 173                 return git_config_string(&ssl_key, var, value);
 174 #endif
 175 #if LIBCURL_VERSION_NUM >= 0x070908
 176         if (!strcmp("http.sslcapath", var))
 177                 return git_config_string(&ssl_capath, var, value);
 178 #endif
 179         if (!strcmp("http.sslcainfo", var))
 180                 return git_config_string(&ssl_cainfo, var, value);
 181         if (!strcmp("http.sslcertpasswordprotected", var)) {
 182                 if (git_config_bool(var, value))
 183                         ssl_cert_password_required = 1;
 184                 return 0;
 185         }
 186         if (!strcmp("http.minsessions", var)) {
 187                 min_curl_sessions = git_config_int(var, value);
 188 #ifndef USE_CURL_MULTI
 189                 if (min_curl_sessions > 1)
 190                         min_curl_sessions = 1;
 191 #endif
 192                 return 0;
 193         }
 194 #ifdef USE_CURL_MULTI
 195         if (!strcmp("http.maxrequests", var)) {
 196                 max_requests = git_config_int(var, value);
 197                 return 0;
 198         }
 199 #endif
 200         if (!strcmp("http.lowspeedlimit", var)) {
 201                 curl_low_speed_limit = (long)git_config_int(var, value);
 202                 return 0;
 203         }
 204         if (!strcmp("http.lowspeedtime", var)) {
 205                 curl_low_speed_time = (long)git_config_int(var, value);
 206                 return 0;
 207         }
 208
 209         if (!strcmp("http.noepsv", var)) {
 210                 curl_ftp_no_epsv = git_config_bool(var, value);
 211                 return 0;
 212         }
 213         if (!strcmp("http.proxy", var))
 214                 return git_config_string(&curl_http_proxy, var, value);
 215
 216         if (!strcmp("http.cookiefile", var))
 217                 return git_config_string(&curl_cookie_file, var, value);
 218
 219         if (!strcmp("http.postbuffer", var)) {
 220                 http_post_buffer = git_config_int(var, value);
 221                 if (http_post_buffer < LARGE_PACKET_MAX)
 222                         http_post_buffer = LARGE_PACKET_MAX;
 223                 return 0;
 224         }
 225
 226         if (!strcmp("http.useragent", var))
 227                 return git_config_string(&user_agent, var, value);
 228
 229         /* Fall back on the default ones */
 230         return git_default_config(var, value, cb);
 231 }
 232
 233 static void init_curl_http_auth(CURL *result)
 234 {
 235         if (user_name) {
 236                 struct strbuf up = STRBUF_INIT;
 237                 if (!user_pass)
 238                         user_pass = xstrdup(git_getpass_with_description("Password", description));
 239                 strbuf_addf(&up, "%s:%s", user_name, user_pass);
 240                 curl_easy_setopt(result, CURLOPT_USERPWD,
 241                                  strbuf_detach(&up, NULL));
 242         }
 243 }
 244
 245 static int has_cert_password(void)
 246 {
 247         if (ssl_cert_password != NULL)
 248                 return 1;
 249         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 250                 return 0;
 251         /* Only prompt the user once. */
 252         ssl_cert_password_required = -1;
 253         ssl_cert_password = git_getpass_with_description("Certificate Password", description);
 254         if (ssl_cert_password != NULL) {
 255                 ssl_cert_password = xstrdup(ssl_cert_password);
 256                 return 1;
 257         } else
 258                 return 0;
 259 }
 260
 261 static CURL *get_curl_handle(void)
 262 {
 263         CURL *result = curl_easy_init();
 264
 265         if (!curl_ssl_verify) {
 266                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 267                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 268         } else {
 269                 /* Verify authenticity of the peer's certificate */
 270                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 271                 /* The name in the cert must match whom we tried to connect */
 272                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 273         }
 274
 275 #if LIBCURL_VERSION_NUM >= 0x070907
 276         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 277 #endif
 278 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 279         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 280 #endif
 281
 282         if (ssl_cert != NULL)
 283                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 284         if (has_cert_password())
 285                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 286 #if LIBCURL_VERSION_NUM >= 0x070903
 287         if (ssl_key != NULL)
 288                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 289 #endif
 290 #if LIBCURL_VERSION_NUM >= 0x070908
 291         if (ssl_capath != NULL)
 292                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 293 #endif
 294         if (ssl_cainfo != NULL)
 295                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 296         curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 297
 298         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 299                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 300                                  curl_low_speed_limit);
 301                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 302                                  curl_low_speed_time);
 303         }
 304
 305         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 306 #if LIBCURL_VERSION_NUM >= 0x071301
 307         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 308 #elif LIBCURL_VERSION_NUM >= 0x071101
 309         curl_easy_setopt(result, CURLOPT_POST301, 1);
 310 #endif
 311
 312         if (getenv("GIT_CURL_VERBOSE"))
 313                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 314
 315         curl_easy_setopt(result, CURLOPT_USERAGENT,
 316                 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 317
 318         if (curl_ftp_no_epsv)
 319                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 320
 321         if (curl_http_proxy)
 322                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 323
 324         return result;
 325 }
 326
 327 static void http_auth_init(const char *url)
 328 {
 329         const char *at, *colon, *cp, *slash, *host;
 330
 331         cp = strstr(url, "://");
 332         if (!cp)
 333                 return;
 334
 335         /*
 336          * Ok, the URL looks like "proto://something".  Which one?
 337          * "proto://<user>:<pass>@<host>/...",
 338          * "proto://<user>@<host>/...", or just
 339          * "proto://<host>/..."?
 340          */
 341         cp += 3;
 342         at = strchr(cp, '@');
 343         colon = strchr(cp, ':');
 344         slash = strchrnul(cp, '/');
 345         if (!at || slash <= at) {
 346                 /* No credentials, but we may have to ask for some later */
 347                 host = cp;
 348         }
 349         else if (!colon || at <= colon) {
 350                 /* Only username */
 351                 user_name = url_decode_mem(cp, at - cp);
 352                 user_pass = NULL;
 353                 host = at + 1;
 354         } else {
 355                 user_name = url_decode_mem(cp, colon - cp);
 356                 user_pass = url_decode_mem(colon + 1, at - (colon + 1));
 357                 host = at + 1;
 358         }
 359
 360         description = url_decode_mem(host, slash - host);
 361 }
 362
 363 static void set_from_env(const char **var, const char *envname)
 364 {
 365         const char *val = getenv(envname);
 366         if (val)
 367                 *var = val;
 368 }
 369
 370 void http_init(struct remote *remote, const char *url)
 371 {
 372         char *low_speed_limit;
 373         char *low_speed_time;
 374
 375         http_is_verbose = 0;
 376
 377         git_config(http_options, NULL);
 378
 379         curl_global_init(CURL_GLOBAL_ALL);
 380
 381         if (remote && remote->http_proxy)
 382                 curl_http_proxy = xstrdup(remote->http_proxy);
 383
 384         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 385         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 386
 387 #ifdef USE_CURL_MULTI
 388         {
 389                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 390                 if (http_max_requests != NULL)
 391                         max_requests = atoi(http_max_requests);
 392         }
 393
 394         curlm = curl_multi_init();
 395         if (curlm == NULL) {
 396                 fprintf(stderr, "Error creating curl multi handle.\n");
 397                 exit(1);
 398         }
 399 #endif
 400
 401         if (getenv("GIT_SSL_NO_VERIFY"))
 402                 curl_ssl_verify = 0;
 403
 404         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 405 #if LIBCURL_VERSION_NUM >= 0x070903
 406         set_from_env(&ssl_key, "GIT_SSL_KEY");
 407 #endif
 408 #if LIBCURL_VERSION_NUM >= 0x070908
 409         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 410 #endif
 411         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 412
 413         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 414
 415         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 416         if (low_speed_limit != NULL)
 417                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 418         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 419         if (low_speed_time != NULL)
 420                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 421
 422         if (curl_ssl_verify == -1)
 423                 curl_ssl_verify = 1;
 424
 425         curl_session_count = 0;
 426 #ifdef USE_CURL_MULTI
 427         if (max_requests < 1)
 428                 max_requests = DEFAULT_MAX_REQUESTS;
 429 #endif
 430
 431         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 432                 curl_ftp_no_epsv = 1;
 433
 434         if (url) {
 435                 http_auth_init(url);
 436                 if (!ssl_cert_password_required &&
 437                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 438                     !prefixcmp(url, "https://"))
 439                         ssl_cert_password_required = 1;
 440         }
 441
 442 #ifndef NO_CURL_EASY_DUPHANDLE
 443         curl_default = get_curl_handle();
 444 #endif
 445 }
 446
 447 void http_cleanup(void)
 448 {
 449         struct active_request_slot *slot = active_queue_head;
 450
 451         while (slot != NULL) {
 452                 struct active_request_slot *next = slot->next;
 453                 if (slot->curl != NULL) {
 454 #ifdef USE_CURL_MULTI
 455                         curl_multi_remove_handle(curlm, slot->curl);
 456 #endif
 457                         curl_easy_cleanup(slot->curl);
 458                 }
 459                 free(slot);
 460                 slot = next;
 461         }
 462         active_queue_head = NULL;
 463
 464 #ifndef NO_CURL_EASY_DUPHANDLE
 465         curl_easy_cleanup(curl_default);
 466 #endif
 467
 468 #ifdef USE_CURL_MULTI
 469         curl_multi_cleanup(curlm);
 470 #endif
 471         curl_global_cleanup();
 472
 473         curl_slist_free_all(pragma_header);
 474         pragma_header = NULL;
 475
 476         curl_slist_free_all(no_pragma_header);
 477         no_pragma_header = NULL;
 478
 479         if (curl_http_proxy) {
 480                 free((void *)curl_http_proxy);
 481                 curl_http_proxy = NULL;
 482         }
 483
 484         if (ssl_cert_password != NULL) {
 485                 memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 486                 free(ssl_cert_password);
 487                 ssl_cert_password = NULL;
 488         }
 489         ssl_cert_password_required = 0;
 490 }
 491
 492 struct active_request_slot *get_active_slot(void)
 493 {
 494         struct active_request_slot *slot = active_queue_head;
 495         struct active_request_slot *newslot;
 496
 497 #ifdef USE_CURL_MULTI
 498         int num_transfers;
 499
 500         /* Wait for a slot to open up if the queue is full */
 501         while (active_requests >= max_requests) {
 502                 curl_multi_perform(curlm, &num_transfers);
 503                 if (num_transfers < active_requests)
 504                         process_curl_messages();
 505         }
 506 #endif
 507
 508         while (slot != NULL && slot->in_use)
 509                 slot = slot->next;
 510
 511         if (slot == NULL) {
 512                 newslot = xmalloc(sizeof(*newslot));
 513                 newslot->curl = NULL;
 514                 newslot->in_use = 0;
 515                 newslot->next = NULL;
 516
 517                 slot = active_queue_head;
 518                 if (slot == NULL) {
 519                         active_queue_head = newslot;
 520                 } else {
 521                         while (slot->next != NULL)
 522                                 slot = slot->next;
 523                         slot->next = newslot;
 524                 }
 525                 slot = newslot;
 526         }
 527
 528         if (slot->curl == NULL) {
 529 #ifdef NO_CURL_EASY_DUPHANDLE
 530                 slot->curl = get_curl_handle();
 531 #else
 532                 slot->curl = curl_easy_duphandle(curl_default);
 533 #endif
 534                 curl_session_count++;
 535         }
 536
 537         active_requests++;
 538         slot->in_use = 1;
 539         slot->local = NULL;
 540         slot->results = NULL;
 541         slot->finished = NULL;
 542         slot->callback_data = NULL;
 543         slot->callback_func = NULL;
 544         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 545         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 546         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 547         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 548         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 549         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 550         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 551         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 552         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 553
 554         return slot;
 555 }
 556
 557 int start_active_slot(struct active_request_slot *slot)
 558 {
 559 #ifdef USE_CURL_MULTI
 560         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 561         int num_transfers;
 562
 563         if (curlm_result != CURLM_OK &&
 564             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 565                 active_requests--;
 566                 slot->in_use = 0;
 567                 return 0;
 568         }
 569
 570         /*
 571          * We know there must be something to do, since we just added
 572          * something.
 573          */
 574         curl_multi_perform(curlm, &num_transfers);
 575 #endif
 576         return 1;
 577 }
 578
 579 #ifdef USE_CURL_MULTI
 580 struct fill_chain {
 581         void *data;
 582         int (*fill)(void *);
 583         struct fill_chain *next;
 584 };
 585
 586 static struct fill_chain *fill_cfg;
 587
 588 void add_fill_function(void *data, int (*fill)(void *))
 589 {
 590         struct fill_chain *new = xmalloc(sizeof(*new));
 591         struct fill_chain **linkp = &fill_cfg;
 592         new->data = data;
 593         new->fill = fill;
 594         new->next = NULL;
 595         while (*linkp)
 596                 linkp = &(*linkp)->next;
 597         *linkp = new;
 598 }
 599
 600 void fill_active_slots(void)
 601 {
 602         struct active_request_slot *slot = active_queue_head;
 603
 604         while (active_requests < max_requests) {
 605                 struct fill_chain *fill;
 606                 for (fill = fill_cfg; fill; fill = fill->next)
 607                         if (fill->fill(fill->data))
 608                                 break;
 609
 610                 if (!fill)
 611                         break;
 612         }
 613
 614         while (slot != NULL) {
 615                 if (!slot->in_use && slot->curl != NULL
 616                         && curl_session_count > min_curl_sessions) {
 617                         curl_easy_cleanup(slot->curl);
 618                         slot->curl = NULL;
 619                         curl_session_count--;
 620                 }
 621                 slot = slot->next;
 622         }
 623 }
 624
 625 void step_active_slots(void)
 626 {
 627         int num_transfers;
 628         CURLMcode curlm_result;
 629
 630         do {
 631                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 632         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 633         if (num_transfers < active_requests) {
 634                 process_curl_messages();
 635                 fill_active_slots();
 636         }
 637 }
 638 #endif
 639
 640 void run_active_slot(struct active_request_slot *slot)
 641 {
 642 #ifdef USE_CURL_MULTI
 643         long last_pos = 0;
 644         long current_pos;
 645         fd_set readfds;
 646         fd_set writefds;
 647         fd_set excfds;
 648         int max_fd;
 649         struct timeval select_timeout;
 650         int finished = 0;
 651
 652         slot->finished = &finished;
 653         while (!finished) {
 654                 data_received = 0;
 655                 step_active_slots();
 656
 657                 if (!data_received && slot->local != NULL) {
 658                         current_pos = ftell(slot->local);
 659                         if (current_pos > last_pos)
 660                                 data_received++;
 661                         last_pos = current_pos;
 662                 }
 663
 664                 if (slot->in_use && !data_received) {
 665                         max_fd = 0;
 666                         FD_ZERO(&readfds);
 667                         FD_ZERO(&writefds);
 668                         FD_ZERO(&excfds);
 669                         select_timeout.tv_sec = 0;
 670                         select_timeout.tv_usec = 50000;
 671                         select(max_fd, &readfds, &writefds,
 672                                &excfds, &select_timeout);
 673                 }
 674         }
 675 #else
 676         while (slot->in_use) {
 677                 slot->curl_result = curl_easy_perform(slot->curl);
 678                 finish_active_slot(slot);
 679         }
 680 #endif
 681 }
 682
 683 static void closedown_active_slot(struct active_request_slot *slot)
 684 {
 685         active_requests--;
 686         slot->in_use = 0;
 687 }
 688
 689 static void release_active_slot(struct active_request_slot *slot)
 690 {
 691         closedown_active_slot(slot);
 692         if (slot->curl && curl_session_count > min_curl_sessions) {
 693 #ifdef USE_CURL_MULTI
 694                 curl_multi_remove_handle(curlm, slot->curl);
 695 #endif
 696                 curl_easy_cleanup(slot->curl);
 697                 slot->curl = NULL;
 698                 curl_session_count--;
 699         }
 700 #ifdef USE_CURL_MULTI
 701         fill_active_slots();
 702 #endif
 703 }
 704
 705 void finish_active_slot(struct active_request_slot *slot)
 706 {
 707         closedown_active_slot(slot);
 708         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 709
 710         if (slot->finished != NULL)
 711                 (*slot->finished) = 1;
 712
 713         /* Store slot results so they can be read after the slot is reused */
 714         if (slot->results != NULL) {
 715                 slot->results->curl_result = slot->curl_result;
 716                 slot->results->http_code = slot->http_code;
 717         }
 718
 719         /* Run callback if appropriate */
 720         if (slot->callback_func != NULL)
 721                 slot->callback_func(slot->callback_data);
 722 }
 723
 724 void finish_all_active_slots(void)
 725 {
 726         struct active_request_slot *slot = active_queue_head;
 727
 728         while (slot != NULL)
 729                 if (slot->in_use) {
 730                         run_active_slot(slot);
 731                         slot = active_queue_head;
 732                 } else {
 733                         slot = slot->next;
 734                 }
 735 }
 736
 737 /* Helpers for modifying and creating URLs */
 738 static inline int needs_quote(int ch)
 739 {
 740         if (((ch >= 'A') && (ch <= 'Z'))
 741                         || ((ch >= 'a') && (ch <= 'z'))
 742                         || ((ch >= '0') && (ch <= '9'))
 743                         || (ch == '/')
 744                         || (ch == '-')
 745                         || (ch == '.'))
 746                 return 0;
 747         return 1;
 748 }
 749
 750 static char *quote_ref_url(const char *base, const char *ref)
 751 {
 752         struct strbuf buf = STRBUF_INIT;
 753         const char *cp;
 754         int ch;
 755
 756         end_url_with_slash(&buf, base);
 757
 758         for (cp = ref; (ch = *cp) != 0; cp++)
 759                 if (needs_quote(ch))
 760                         strbuf_addf(&buf, "%%%02x", ch);
 761                 else
 762                         strbuf_addch(&buf, *cp);
 763
 764         return strbuf_detach(&buf, NULL);
 765 }
 766
 767 void append_remote_object_url(struct strbuf *buf, const char *url,
 768                               const char *hex,
 769                               int only_two_digit_prefix)
 770 {
 771         end_url_with_slash(buf, url);
 772
 773         strbuf_addf(buf, "objects/%.*s/", 2, hex);
 774         if (!only_two_digit_prefix)
 775                 strbuf_addf(buf, "%s", hex+2);
 776 }
 777
 778 char *get_remote_object_url(const char *url, const char *hex,
 779                             int only_two_digit_prefix)
 780 {
 781         struct strbuf buf = STRBUF_INIT;
 782         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 783         return strbuf_detach(&buf, NULL);
 784 }
 785
 786 /* http_request() targets */
 787 #define HTTP_REQUEST_STRBUF     0
 788 #define HTTP_REQUEST_FILE       1
 789
 790 static int http_request(const char *url, void *result, int target, int options)
 791 {
 792         struct active_request_slot *slot;
 793         struct slot_results results;
 794         struct curl_slist *headers = NULL;
 795         struct strbuf buf = STRBUF_INIT;
 796         int ret;
 797
 798         slot = get_active_slot();
 799         slot->results = &results;
 800         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 801
 802         if (result == NULL) {
 803                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 804         } else {
 805                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 806                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 807
 808                 if (target == HTTP_REQUEST_FILE) {
 809                         long posn = ftell(result);
 810                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 811                                          fwrite);
 812                         if (posn > 0) {
 813                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 814                                 headers = curl_slist_append(headers, buf.buf);
 815                                 strbuf_reset(&buf);
 816                         }
 817                         slot->local = result;
 818                 } else
 819                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 820                                          fwrite_buffer);
 821         }
 822
 823         strbuf_addstr(&buf, "Pragma:");
 824         if (options & HTTP_NO_CACHE)
 825                 strbuf_addstr(&buf, " no-cache");
 826
 827         headers = curl_slist_append(headers, buf.buf);
 828
 829         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 830         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 831
 832         if (start_active_slot(slot)) {
 833                 run_active_slot(slot);
 834                 if (results.curl_result == CURLE_OK)
 835                         ret = HTTP_OK;
 836                 else if (missing_target(&results))
 837                         ret = HTTP_MISSING_TARGET;
 838                 else if (results.http_code == 401) {
 839                         if (user_name && user_pass) {
 840                                 ret = HTTP_NOAUTH;
 841                         } else {
 842                                 /*
 843                                  * git_getpass is needed here because its very likely stdin/stdout are
 844                                  * pipes to our parent process.  So we instead need to use /dev/tty,
 845                                  * but that is non-portable.  Using git_getpass() can at least be stubbed
 846                                  * on other platforms with a different implementation if/when necessary.
 847                                  */
 848                                 if (!user_name)
 849                                         user_name = xstrdup(git_getpass_with_description("Username", description));
 850                                 init_curl_http_auth(slot->curl);
 851                                 ret = HTTP_REAUTH;
 852                         }
 853                 } else {
 854                         if (!curl_errorstr[0])
 855                                 strlcpy(curl_errorstr,
 856                                         curl_easy_strerror(results.curl_result),
 857                                         sizeof(curl_errorstr));
 858                         ret = HTTP_ERROR;
 859                 }
 860         } else {
 861                 error("Unable to start HTTP request for %s", url);
 862                 ret = HTTP_START_FAILED;
 863         }
 864
 865         slot->local = NULL;
 866         curl_slist_free_all(headers);
 867         strbuf_release(&buf);
 868
 869         return ret;
 870 }
 871
 872 static int http_request_reauth(const char *url, void *result, int target,
 873                                int options)
 874 {
 875         int ret = http_request(url, result, target, options);
 876         if (ret != HTTP_REAUTH)
 877                 return ret;
 878         return http_request(url, result, target, options);
 879 }
 880
 881 int http_get_strbuf(const char *url, struct strbuf *result, int options)
 882 {
 883         return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 884 }
 885
 886 /*
 887  * Downloads an url and stores the result in the given file.
 888  *
 889  * If a previous interrupted download is detected (i.e. a previous temporary
 890  * file is still around) the download is resumed.
 891  */
 892 static int http_get_file(const char *url, const char *filename, int options)
 893 {
 894         int ret;
 895         struct strbuf tmpfile = STRBUF_INIT;
 896         FILE *result;
 897
 898         strbuf_addf(&tmpfile, "%s.temp", filename);
 899         result = fopen(tmpfile.buf, "a");
 900         if (! result) {
 901                 error("Unable to open local file %s", tmpfile.buf);
 902                 ret = HTTP_ERROR;
 903                 goto cleanup;
 904         }
 905
 906         ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 907         fclose(result);
 908
 909         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 910                 ret = HTTP_ERROR;
 911 cleanup:
 912         strbuf_release(&tmpfile);
 913         return ret;
 914 }
 915
 916 int http_error(const char *url, int ret)
 917 {
 918         /* http_request has already handled HTTP_START_FAILED. */
 919         if (ret != HTTP_START_FAILED)
 920                 error("%s while accessing %s", curl_errorstr, url);
 921
 922         return ret;
 923 }
 924
 925 int http_fetch_ref(const char *base, struct ref *ref)
 926 {
 927         char *url;
 928         struct strbuf buffer = STRBUF_INIT;
 929         int ret = -1;
 930
 931         url = quote_ref_url(base, ref->name);
 932         if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 933                 strbuf_rtrim(&buffer);
 934                 if (buffer.len == 40)
 935                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 936                 else if (!prefixcmp(buffer.buf, "ref: ")) {
 937                         ref->symref = xstrdup(buffer.buf + 5);
 938                         ret = 0;
 939                 }
 940         }
 941
 942         strbuf_release(&buffer);
 943         free(url);
 944         return ret;
 945 }
 946
 947 /* Helpers for fetching packs */
 948 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 949 {
 950         char *url, *tmp;
 951         struct strbuf buf = STRBUF_INIT;
 952
 953         if (http_is_verbose)
 954                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 955
 956         end_url_with_slash(&buf, base_url);
 957         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 958         url = strbuf_detach(&buf, NULL);
 959
 960         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 961         tmp = strbuf_detach(&buf, NULL);
 962
 963         if (http_get_file(url, tmp, 0) != HTTP_OK) {
 964                 error("Unable to get pack index %s\n", url);
 965                 free(tmp);
 966                 tmp = NULL;
 967         }
 968
 969         free(url);
 970         return tmp;
 971 }
 972
 973 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 974         unsigned char *sha1, const char *base_url)
 975 {
 976         struct packed_git *new_pack;
 977         char *tmp_idx = NULL;
 978         int ret;
 979
 980         if (has_pack_index(sha1)) {
 981                 new_pack = parse_pack_index(sha1, NULL);
 982                 if (!new_pack)
 983                         return -1; /* parse_pack_index() already issued error message */
 984                 goto add_pack;
 985         }
 986
 987         tmp_idx = fetch_pack_index(sha1, base_url);
 988         if (!tmp_idx)
 989                 return -1;
 990
 991         new_pack = parse_pack_index(sha1, tmp_idx);
 992         if (!new_pack) {
 993                 unlink(tmp_idx);
 994                 free(tmp_idx);
 995
 996                 return -1; /* parse_pack_index() already issued error message */
 997         }
 998
 999         ret = verify_pack_index(new_pack);
1000         if (!ret) {
1001                 close_pack_index(new_pack);
1002                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1003         }
1004         free(tmp_idx);
1005         if (ret)
1006                 return -1;
1007
1008 add_pack:
1009         new_pack->next = *packs_head;
1010         *packs_head = new_pack;
1011         return 0;
1012 }
1013
1014 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1015 {
1016         int ret = 0, i = 0;
1017         char *url, *data;
1018         struct strbuf buf = STRBUF_INIT;
1019         unsigned char sha1[20];
1020
1021         end_url_with_slash(&buf, base_url);
1022         strbuf_addstr(&buf, "objects/info/packs");
1023         url = strbuf_detach(&buf, NULL);
1024
1025         ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1026         if (ret != HTTP_OK)
1027                 goto cleanup;
1028
1029         data = buf.buf;
1030         while (i < buf.len) {
1031                 switch (data[i]) {
1032                 case 'P':
1033                         i++;
1034                         if (i + 52 <= buf.len &&
1035                             !prefixcmp(data + i, " pack-") &&
1036                             !prefixcmp(data + i + 46, ".pack\n")) {
1037                                 get_sha1_hex(data + i + 6, sha1);
1038                                 fetch_and_setup_pack_index(packs_head, sha1,
1039                                                       base_url);
1040                                 i += 51;
1041                                 break;
1042                         }
1043                 default:
1044                         while (i < buf.len && data[i] != '\n')
1045                                 i++;
1046                 }
1047                 i++;
1048         }
1049
1050 cleanup:
1051         free(url);
1052         return ret;
1053 }
1054
1055 void release_http_pack_request(struct http_pack_request *preq)
1056 {
1057         if (preq->packfile != NULL) {
1058                 fclose(preq->packfile);
1059                 preq->packfile = NULL;
1060                 preq->slot->local = NULL;
1061         }
1062         if (preq->range_header != NULL) {
1063                 curl_slist_free_all(preq->range_header);
1064                 preq->range_header = NULL;
1065         }
1066         preq->slot = NULL;
1067         free(preq->url);
1068 }
1069
1070 int finish_http_pack_request(struct http_pack_request *preq)
1071 {
1072         struct packed_git **lst;
1073         struct packed_git *p = preq->target;
1074         char *tmp_idx;
1075         struct child_process ip;
1076         const char *ip_argv[8];
1077
1078         close_pack_index(p);
1079
1080         fclose(preq->packfile);
1081         preq->packfile = NULL;
1082         preq->slot->local = NULL;
1083
1084         lst = preq->lst;
1085         while (*lst != p)
1086                 lst = &((*lst)->next);
1087         *lst = (*lst)->next;
1088
1089         tmp_idx = xstrdup(preq->tmpfile);
1090         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1091                ".idx.temp");
1092
1093         ip_argv[0] = "index-pack";
1094         ip_argv[1] = "-o";
1095         ip_argv[2] = tmp_idx;
1096         ip_argv[3] = preq->tmpfile;
1097         ip_argv[4] = NULL;
1098
1099         memset(&ip, 0, sizeof(ip));
1100         ip.argv = ip_argv;
1101         ip.git_cmd = 1;
1102         ip.no_stdin = 1;
1103         ip.no_stdout = 1;
1104
1105         if (run_command(&ip)) {
1106                 unlink(preq->tmpfile);
1107                 unlink(tmp_idx);
1108                 free(tmp_idx);
1109                 return -1;
1110         }
1111
1112         unlink(sha1_pack_index_name(p->sha1));
1113
1114         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1115          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1116                 free(tmp_idx);
1117                 return -1;
1118         }
1119
1120         install_packed_git(p);
1121         free(tmp_idx);
1122         return 0;
1123 }
1124
1125 struct http_pack_request *new_http_pack_request(
1126         struct packed_git *target, const char *base_url)
1127 {
1128         long prev_posn = 0;
1129         char range[RANGE_HEADER_SIZE];
1130         struct strbuf buf = STRBUF_INIT;
1131         struct http_pack_request *preq;
1132
1133         preq = xcalloc(1, sizeof(*preq));
1134         preq->target = target;
1135
1136         end_url_with_slash(&buf, base_url);
1137         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1138                 sha1_to_hex(target->sha1));
1139         preq->url = strbuf_detach(&buf, NULL);
1140
1141         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1142                 sha1_pack_name(target->sha1));
1143         preq->packfile = fopen(preq->tmpfile, "a");
1144         if (!preq->packfile) {
1145                 error("Unable to open local file %s for pack",
1146                       preq->tmpfile);
1147                 goto abort;
1148         }
1149
1150         preq->slot = get_active_slot();
1151         preq->slot->local = preq->packfile;
1152         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1153         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1154         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1155         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1156                 no_pragma_header);
1157
1158         /*
1159          * If there is data present from a previous transfer attempt,
1160          * resume where it left off
1161          */
1162         prev_posn = ftell(preq->packfile);
1163         if (prev_posn>0) {
1164                 if (http_is_verbose)
1165                         fprintf(stderr,
1166                                 "Resuming fetch of pack %s at byte %ld\n",
1167                                 sha1_to_hex(target->sha1), prev_posn);
1168                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1169                 preq->range_header = curl_slist_append(NULL, range);
1170                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1171                         preq->range_header);
1172         }
1173
1174         return preq;
1175
1176 abort:
1177         free(preq->url);
1178         free(preq);
1179         return NULL;
1180 }
1181
1182 /* Helpers for fetching objects (loose) */
1183 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1184                                void *data)
1185 {
1186         unsigned char expn[4096];
1187         size_t size = eltsize * nmemb;
1188         int posn = 0;
1189         struct http_object_request *freq =
1190                 (struct http_object_request *)data;
1191         do {
1192                 ssize_t retval = xwrite(freq->localfile,
1193                                         (char *) ptr + posn, size - posn);
1194                 if (retval < 0)
1195                         return posn;
1196                 posn += retval;
1197         } while (posn < size);
1198
1199         freq->stream.avail_in = size;
1200         freq->stream.next_in = (void *)ptr;
1201         do {
1202                 freq->stream.next_out = expn;
1203                 freq->stream.avail_out = sizeof(expn);
1204                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1205                 git_SHA1_Update(&freq->c, expn,
1206                                 sizeof(expn) - freq->stream.avail_out);
1207         } while (freq->stream.avail_in && freq->zret == Z_OK);
1208         data_received++;
1209         return size;
1210 }
1211
1212 struct http_object_request *new_http_object_request(const char *base_url,
1213         unsigned char *sha1)
1214 {
1215         char *hex = sha1_to_hex(sha1);
1216         char *filename;
1217         char prevfile[PATH_MAX];
1218         int prevlocal;
1219         char prev_buf[PREV_BUF_SIZE];
1220         ssize_t prev_read = 0;
1221         long prev_posn = 0;
1222         char range[RANGE_HEADER_SIZE];
1223         struct curl_slist *range_header = NULL;
1224         struct http_object_request *freq;
1225
1226         freq = xcalloc(1, sizeof(*freq));
1227         hashcpy(freq->sha1, sha1);
1228         freq->localfile = -1;
1229
1230         filename = sha1_file_name(sha1);
1231         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1232                  "%s.temp", filename);
1233
1234         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1235         unlink_or_warn(prevfile);
1236         rename(freq->tmpfile, prevfile);
1237         unlink_or_warn(freq->tmpfile);
1238
1239         if (freq->localfile != -1)
1240                 error("fd leakage in start: %d", freq->localfile);
1241         freq->localfile = open(freq->tmpfile,
1242                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1243         /*
1244          * This could have failed due to the "lazy directory creation";
1245          * try to mkdir the last path component.
1246          */
1247         if (freq->localfile < 0 && errno == ENOENT) {
1248                 char *dir = strrchr(freq->tmpfile, '/');
1249                 if (dir) {
1250                         *dir = 0;
1251                         mkdir(freq->tmpfile, 0777);
1252                         *dir = '/';
1253                 }
1254                 freq->localfile = open(freq->tmpfile,
1255                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1256         }
1257
1258         if (freq->localfile < 0) {
1259                 error("Couldn't create temporary file %s: %s",
1260                       freq->tmpfile, strerror(errno));
1261                 goto abort;
1262         }
1263
1264         git_inflate_init(&freq->stream);
1265
1266         git_SHA1_Init(&freq->c);
1267
1268         freq->url = get_remote_object_url(base_url, hex, 0);
1269
1270         /*
1271          * If a previous temp file is present, process what was already
1272          * fetched.
1273          */
1274         prevlocal = open(prevfile, O_RDONLY);
1275         if (prevlocal != -1) {
1276                 do {
1277                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1278                         if (prev_read>0) {
1279                                 if (fwrite_sha1_file(prev_buf,
1280                                                      1,
1281                                                      prev_read,
1282                                                      freq) == prev_read) {
1283                                         prev_posn += prev_read;
1284                                 } else {
1285                                         prev_read = -1;
1286                                 }
1287                         }
1288                 } while (prev_read > 0);
1289                 close(prevlocal);
1290         }
1291         unlink_or_warn(prevfile);
1292
1293         /*
1294          * Reset inflate/SHA1 if there was an error reading the previous temp
1295          * file; also rewind to the beginning of the local file.
1296          */
1297         if (prev_read == -1) {
1298                 memset(&freq->stream, 0, sizeof(freq->stream));
1299                 git_inflate_init(&freq->stream);
1300                 git_SHA1_Init(&freq->c);
1301                 if (prev_posn>0) {
1302                         prev_posn = 0;
1303                         lseek(freq->localfile, 0, SEEK_SET);
1304                         if (ftruncate(freq->localfile, 0) < 0) {
1305                                 error("Couldn't truncate temporary file %s: %s",
1306                                           freq->tmpfile, strerror(errno));
1307                                 goto abort;
1308                         }
1309                 }
1310         }
1311
1312         freq->slot = get_active_slot();
1313
1314         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1315         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1316         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1317         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1318         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1319
1320         /*
1321          * If we have successfully processed data from a previous fetch
1322          * attempt, only fetch the data we don't already have.
1323          */
1324         if (prev_posn>0) {
1325                 if (http_is_verbose)
1326                         fprintf(stderr,
1327                                 "Resuming fetch of object %s at byte %ld\n",
1328                                 hex, prev_posn);
1329                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1330                 range_header = curl_slist_append(range_header, range);
1331                 curl_easy_setopt(freq->slot->curl,
1332                                  CURLOPT_HTTPHEADER, range_header);
1333         }
1334
1335         return freq;
1336
1337 abort:
1338         free(freq->url);
1339         free(freq);
1340         return NULL;
1341 }
1342
1343 void process_http_object_request(struct http_object_request *freq)
1344 {
1345         if (freq->slot == NULL)
1346                 return;
1347         freq->curl_result = freq->slot->curl_result;
1348         freq->http_code = freq->slot->http_code;
1349         freq->slot = NULL;
1350 }
1351
1352 int finish_http_object_request(struct http_object_request *freq)
1353 {
1354         struct stat st;
1355
1356         close(freq->localfile);
1357         freq->localfile = -1;
1358
1359         process_http_object_request(freq);
1360
1361         if (freq->http_code == 416) {
1362                 warning("requested range invalid; we may already have all the data.");
1363         } else if (freq->curl_result != CURLE_OK) {
1364                 if (stat(freq->tmpfile, &st) == 0)
1365                         if (st.st_size == 0)
1366                                 unlink_or_warn(freq->tmpfile);
1367                 return -1;
1368         }
1369
1370         git_inflate_end(&freq->stream);
1371         git_SHA1_Final(freq->real_sha1, &freq->c);
1372         if (freq->zret != Z_STREAM_END) {
1373                 unlink_or_warn(freq->tmpfile);
1374                 return -1;
1375         }
1376         if (hashcmp(freq->sha1, freq->real_sha1)) {
1377                 unlink_or_warn(freq->tmpfile);
1378                 return -1;
1379         }
1380         freq->rename =
1381                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1382
1383         return freq->rename;
1384 }
1385
1386 void abort_http_object_request(struct http_object_request *freq)
1387 {
1388         unlink_or_warn(freq->tmpfile);
1389
1390         release_http_object_request(freq);
1391 }
1392
1393 void release_http_object_request(struct http_object_request *freq)
1394 {
1395         if (freq->localfile != -1) {
1396                 close(freq->localfile);
1397                 freq->localfile = -1;
1398         }
1399         if (freq->url != NULL) {
1400                 free(freq->url);
1401                 freq->url = NULL;
1402         }
1403         if (freq->slot != NULL) {
1404                 freq->slot->callback_func = NULL;
1405                 freq->slot->callback_data = NULL;
1406                 release_active_slot(freq->slot);
1407                 freq->slot = NULL;
1408         }
1409 }