Andrew's git / gitweb.git / http.c
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http.con commit Merge branch 'jm/mergetool-pathspec' (5fbdb9c)
   1#include "http.h"
   2#include "pack.h"
   3#include "sideband.h"
   4#include "run-command.h"
   5#include "url.h"
   6
   7int data_received;
   8int active_requests;
   9int http_is_verbose;
  10size_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
  16static int min_curl_sessions = 1;
  17static int curl_session_count;
  18#ifdef USE_CURL_MULTI
  19static int max_requests = -1;
  20static CURLM *curlm;
  21#endif
  22#ifndef NO_CURL_EASY_DUPHANDLE
  23static CURL *curl_default;
  24#endif
  25
  26#define PREV_BUF_SIZE 4096
  27#define RANGE_HEADER_SIZE 30
  28
  29char curl_errorstr[CURL_ERROR_SIZE];
  30
  31static int curl_ssl_verify = -1;
  32static const char *ssl_cert;
  33#if LIBCURL_VERSION_NUM >= 0x070903
  34static const char *ssl_key;
  35#endif
  36#if LIBCURL_VERSION_NUM >= 0x070908
  37static const char *ssl_capath;
  38#endif
  39static const char *ssl_cainfo;
  40static long curl_low_speed_limit = -1;
  41static long curl_low_speed_time = -1;
  42static int curl_ftp_no_epsv;
  43static const char *curl_http_proxy;
  44static const char *curl_cookie_file;
  45static char *user_name, *user_pass;
  46static 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
  56static char *ssl_cert_password;
  57static int ssl_cert_password_required;
  58
  59static struct curl_slist *pragma_header;
  60static struct curl_slist *no_pragma_header;
  61
  62static struct active_request_slot *active_queue_head;
  63
  64size_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
  78curlioerr 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
  96size_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
 106size_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
 113static 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
 142static int http_options(const char *var, const char *value, void *cb)
 143{
 144        if (!strcmp("http.sslverify", var)) {
 145                curl_ssl_verify = git_config_bool(var, value);
 146                return 0;
 147        }
 148        if (!strcmp("http.sslcert", var))
 149                return git_config_string(&ssl_cert, var, value);
 150#if LIBCURL_VERSION_NUM >= 0x070903
 151        if (!strcmp("http.sslkey", var))
 152                return git_config_string(&ssl_key, var, value);
 153#endif
 154#if LIBCURL_VERSION_NUM >= 0x070908
 155        if (!strcmp("http.sslcapath", var))
 156                return git_config_string(&ssl_capath, var, value);
 157#endif
 158        if (!strcmp("http.sslcainfo", var))
 159                return git_config_string(&ssl_cainfo, var, value);
 160        if (!strcmp("http.sslcertpasswordprotected", var)) {
 161                if (git_config_bool(var, value))
 162                        ssl_cert_password_required = 1;
 163                return 0;
 164        }
 165        if (!strcmp("http.minsessions", var)) {
 166                min_curl_sessions = git_config_int(var, value);
 167#ifndef USE_CURL_MULTI
 168                if (min_curl_sessions > 1)
 169                        min_curl_sessions = 1;
 170#endif
 171                return 0;
 172        }
 173#ifdef USE_CURL_MULTI
 174        if (!strcmp("http.maxrequests", var)) {
 175                max_requests = git_config_int(var, value);
 176                return 0;
 177        }
 178#endif
 179        if (!strcmp("http.lowspeedlimit", var)) {
 180                curl_low_speed_limit = (long)git_config_int(var, value);
 181                return 0;
 182        }
 183        if (!strcmp("http.lowspeedtime", var)) {
 184                curl_low_speed_time = (long)git_config_int(var, value);
 185                return 0;
 186        }
 187
 188        if (!strcmp("http.noepsv", var)) {
 189                curl_ftp_no_epsv = git_config_bool(var, value);
 190                return 0;
 191        }
 192        if (!strcmp("http.proxy", var))
 193                return git_config_string(&curl_http_proxy, var, value);
 194
 195        if (!strcmp("http.cookiefile", var))
 196                return git_config_string(&curl_cookie_file, var, value);
 197
 198        if (!strcmp("http.postbuffer", var)) {
 199                http_post_buffer = git_config_int(var, value);
 200                if (http_post_buffer < LARGE_PACKET_MAX)
 201                        http_post_buffer = LARGE_PACKET_MAX;
 202                return 0;
 203        }
 204
 205        if (!strcmp("http.useragent", var))
 206                return git_config_string(&user_agent, var, value);
 207
 208        /* Fall back on the default ones */
 209        return git_default_config(var, value, cb);
 210}
 211
 212static void init_curl_http_auth(CURL *result)
 213{
 214        if (user_name) {
 215                struct strbuf up = STRBUF_INIT;
 216                if (!user_pass)
 217                        user_pass = xstrdup(git_getpass("Password: "));
 218                strbuf_addf(&up, "%s:%s", user_name, user_pass);
 219                curl_easy_setopt(result, CURLOPT_USERPWD,
 220                                 strbuf_detach(&up, NULL));
 221        }
 222}
 223
 224static int has_cert_password(void)
 225{
 226        if (ssl_cert_password != NULL)
 227                return 1;
 228        if (ssl_cert == NULL || ssl_cert_password_required != 1)
 229                return 0;
 230        /* Only prompt the user once. */
 231        ssl_cert_password_required = -1;
 232        ssl_cert_password = git_getpass("Certificate Password: ");
 233        if (ssl_cert_password != NULL) {
 234                ssl_cert_password = xstrdup(ssl_cert_password);
 235                return 1;
 236        } else
 237                return 0;
 238}
 239
 240static CURL *get_curl_handle(void)
 241{
 242        CURL *result = curl_easy_init();
 243
 244        if (!curl_ssl_verify) {
 245                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 246                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 247        } else {
 248                /* Verify authenticity of the peer's certificate */
 249                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 250                /* The name in the cert must match whom we tried to connect */
 251                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 252        }
 253
 254#if LIBCURL_VERSION_NUM >= 0x070907
 255        curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 256#endif
 257#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 258        curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 259#endif
 260
 261        init_curl_http_auth(result);
 262
 263        if (ssl_cert != NULL)
 264                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 265        if (has_cert_password())
 266                curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 267#if LIBCURL_VERSION_NUM >= 0x070903
 268        if (ssl_key != NULL)
 269                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 270#endif
 271#if LIBCURL_VERSION_NUM >= 0x070908
 272        if (ssl_capath != NULL)
 273                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 274#endif
 275        if (ssl_cainfo != NULL)
 276                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 277        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 278
 279        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 280                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 281                                 curl_low_speed_limit);
 282                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 283                                 curl_low_speed_time);
 284        }
 285
 286        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 287#if LIBCURL_VERSION_NUM >= 0x071301
 288        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 289#elif LIBCURL_VERSION_NUM >= 0x071101
 290        curl_easy_setopt(result, CURLOPT_POST301, 1);
 291#endif
 292
 293        if (getenv("GIT_CURL_VERBOSE"))
 294                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 295
 296        curl_easy_setopt(result, CURLOPT_USERAGENT,
 297                user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 298
 299        if (curl_ftp_no_epsv)
 300                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 301
 302        if (curl_http_proxy)
 303                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 304
 305        return result;
 306}
 307
 308static void http_auth_init(const char *url)
 309{
 310        char *at, *colon, *cp, *slash, *decoded;
 311        int len;
 312
 313        cp = strstr(url, "://");
 314        if (!cp)
 315                return;
 316
 317        /*
 318         * Ok, the URL looks like "proto://something".  Which one?
 319         * "proto://<user>:<pass>@<host>/...",
 320         * "proto://<user>@<host>/...", or just
 321         * "proto://<host>/..."?
 322         */
 323        cp += 3;
 324        at = strchr(cp, '@');
 325        colon = strchr(cp, ':');
 326        slash = strchrnul(cp, '/');
 327        if (!at || slash <= at)
 328                return; /* No credentials */
 329        if (!colon || at <= colon) {
 330                /* Only username */
 331                len = at - cp;
 332                user_name = xmalloc(len + 1);
 333                memcpy(user_name, cp, len);
 334                user_name[len] = '\0';
 335                decoded = url_decode(user_name);
 336                free(user_name);
 337                user_name = decoded;
 338                user_pass = NULL;
 339        } else {
 340                len = colon - cp;
 341                user_name = xmalloc(len + 1);
 342                memcpy(user_name, cp, len);
 343                user_name[len] = '\0';
 344                decoded = url_decode(user_name);
 345                free(user_name);
 346                user_name = decoded;
 347                len = at - (colon + 1);
 348                user_pass = xmalloc(len + 1);
 349                memcpy(user_pass, colon + 1, len);
 350                user_pass[len] = '\0';
 351                decoded = url_decode(user_pass);
 352                free(user_pass);
 353                user_pass = decoded;
 354        }
 355}
 356
 357static void set_from_env(const char **var, const char *envname)
 358{
 359        const char *val = getenv(envname);
 360        if (val)
 361                *var = val;
 362}
 363
 364void http_init(struct remote *remote)
 365{
 366        char *low_speed_limit;
 367        char *low_speed_time;
 368
 369        http_is_verbose = 0;
 370
 371        git_config(http_options, NULL);
 372
 373        curl_global_init(CURL_GLOBAL_ALL);
 374
 375        if (remote && remote->http_proxy)
 376                curl_http_proxy = xstrdup(remote->http_proxy);
 377
 378        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 379        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 380
 381#ifdef USE_CURL_MULTI
 382        {
 383                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 384                if (http_max_requests != NULL)
 385                        max_requests = atoi(http_max_requests);
 386        }
 387
 388        curlm = curl_multi_init();
 389        if (curlm == NULL) {
 390                fprintf(stderr, "Error creating curl multi handle.\n");
 391                exit(1);
 392        }
 393#endif
 394
 395        if (getenv("GIT_SSL_NO_VERIFY"))
 396                curl_ssl_verify = 0;
 397
 398        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 399#if LIBCURL_VERSION_NUM >= 0x070903
 400        set_from_env(&ssl_key, "GIT_SSL_KEY");
 401#endif
 402#if LIBCURL_VERSION_NUM >= 0x070908
 403        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 404#endif
 405        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 406
 407        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 408
 409        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 410        if (low_speed_limit != NULL)
 411                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 412        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 413        if (low_speed_time != NULL)
 414                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 415
 416        if (curl_ssl_verify == -1)
 417                curl_ssl_verify = 1;
 418
 419        curl_session_count = 0;
 420#ifdef USE_CURL_MULTI
 421        if (max_requests < 1)
 422                max_requests = DEFAULT_MAX_REQUESTS;
 423#endif
 424
 425        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 426                curl_ftp_no_epsv = 1;
 427
 428        if (remote && remote->url && remote->url[0]) {
 429                http_auth_init(remote->url[0]);
 430                if (!ssl_cert_password_required &&
 431                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 432                    !prefixcmp(remote->url[0], "https://"))
 433                        ssl_cert_password_required = 1;
 434        }
 435
 436#ifndef NO_CURL_EASY_DUPHANDLE
 437        curl_default = get_curl_handle();
 438#endif
 439}
 440
 441void http_cleanup(void)
 442{
 443        struct active_request_slot *slot = active_queue_head;
 444
 445        while (slot != NULL) {
 446                struct active_request_slot *next = slot->next;
 447                if (slot->curl != NULL) {
 448#ifdef USE_CURL_MULTI
 449                        curl_multi_remove_handle(curlm, slot->curl);
 450#endif
 451                        curl_easy_cleanup(slot->curl);
 452                }
 453                free(slot);
 454                slot = next;
 455        }
 456        active_queue_head = NULL;
 457
 458#ifndef NO_CURL_EASY_DUPHANDLE
 459        curl_easy_cleanup(curl_default);
 460#endif
 461
 462#ifdef USE_CURL_MULTI
 463        curl_multi_cleanup(curlm);
 464#endif
 465        curl_global_cleanup();
 466
 467        curl_slist_free_all(pragma_header);
 468        pragma_header = NULL;
 469
 470        curl_slist_free_all(no_pragma_header);
 471        no_pragma_header = NULL;
 472
 473        if (curl_http_proxy) {
 474                free((void *)curl_http_proxy);
 475                curl_http_proxy = NULL;
 476        }
 477
 478        if (ssl_cert_password != NULL) {
 479                memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 480                free(ssl_cert_password);
 481                ssl_cert_password = NULL;
 482        }
 483        ssl_cert_password_required = 0;
 484}
 485
 486struct active_request_slot *get_active_slot(void)
 487{
 488        struct active_request_slot *slot = active_queue_head;
 489        struct active_request_slot *newslot;
 490
 491#ifdef USE_CURL_MULTI
 492        int num_transfers;
 493
 494        /* Wait for a slot to open up if the queue is full */
 495        while (active_requests >= max_requests) {
 496                curl_multi_perform(curlm, &num_transfers);
 497                if (num_transfers < active_requests)
 498                        process_curl_messages();
 499        }
 500#endif
 501
 502        while (slot != NULL && slot->in_use)
 503                slot = slot->next;
 504
 505        if (slot == NULL) {
 506                newslot = xmalloc(sizeof(*newslot));
 507                newslot->curl = NULL;
 508                newslot->in_use = 0;
 509                newslot->next = NULL;
 510
 511                slot = active_queue_head;
 512                if (slot == NULL) {
 513                        active_queue_head = newslot;
 514                } else {
 515                        while (slot->next != NULL)
 516                                slot = slot->next;
 517                        slot->next = newslot;
 518                }
 519                slot = newslot;
 520        }
 521
 522        if (slot->curl == NULL) {
 523#ifdef NO_CURL_EASY_DUPHANDLE
 524                slot->curl = get_curl_handle();
 525#else
 526                slot->curl = curl_easy_duphandle(curl_default);
 527#endif
 528                curl_session_count++;
 529        }
 530
 531        active_requests++;
 532        slot->in_use = 1;
 533        slot->local = NULL;
 534        slot->results = NULL;
 535        slot->finished = NULL;
 536        slot->callback_data = NULL;
 537        slot->callback_func = NULL;
 538        curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 539        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 540        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 541        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 542        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 543        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 544        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 545        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 546        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 547
 548        return slot;
 549}
 550
 551int start_active_slot(struct active_request_slot *slot)
 552{
 553#ifdef USE_CURL_MULTI
 554        CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 555        int num_transfers;
 556
 557        if (curlm_result != CURLM_OK &&
 558            curlm_result != CURLM_CALL_MULTI_PERFORM) {
 559                active_requests--;
 560                slot->in_use = 0;
 561                return 0;
 562        }
 563
 564        /*
 565         * We know there must be something to do, since we just added
 566         * something.
 567         */
 568        curl_multi_perform(curlm, &num_transfers);
 569#endif
 570        return 1;
 571}
 572
 573#ifdef USE_CURL_MULTI
 574struct fill_chain {
 575        void *data;
 576        int (*fill)(void *);
 577        struct fill_chain *next;
 578};
 579
 580static struct fill_chain *fill_cfg;
 581
 582void add_fill_function(void *data, int (*fill)(void *))
 583{
 584        struct fill_chain *new = xmalloc(sizeof(*new));
 585        struct fill_chain **linkp = &fill_cfg;
 586        new->data = data;
 587        new->fill = fill;
 588        new->next = NULL;
 589        while (*linkp)
 590                linkp = &(*linkp)->next;
 591        *linkp = new;
 592}
 593
 594void fill_active_slots(void)
 595{
 596        struct active_request_slot *slot = active_queue_head;
 597
 598        while (active_requests < max_requests) {
 599                struct fill_chain *fill;
 600                for (fill = fill_cfg; fill; fill = fill->next)
 601                        if (fill->fill(fill->data))
 602                                break;
 603
 604                if (!fill)
 605                        break;
 606        }
 607
 608        while (slot != NULL) {
 609                if (!slot->in_use && slot->curl != NULL
 610                        && curl_session_count > min_curl_sessions) {
 611                        curl_easy_cleanup(slot->curl);
 612                        slot->curl = NULL;
 613                        curl_session_count--;
 614                }
 615                slot = slot->next;
 616        }
 617}
 618
 619void step_active_slots(void)
 620{
 621        int num_transfers;
 622        CURLMcode curlm_result;
 623
 624        do {
 625                curlm_result = curl_multi_perform(curlm, &num_transfers);
 626        } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 627        if (num_transfers < active_requests) {
 628                process_curl_messages();
 629                fill_active_slots();
 630        }
 631}
 632#endif
 633
 634void run_active_slot(struct active_request_slot *slot)
 635{
 636#ifdef USE_CURL_MULTI
 637        long last_pos = 0;
 638        long current_pos;
 639        fd_set readfds;
 640        fd_set writefds;
 641        fd_set excfds;
 642        int max_fd;
 643        struct timeval select_timeout;
 644        int finished = 0;
 645
 646        slot->finished = &finished;
 647        while (!finished) {
 648                data_received = 0;
 649                step_active_slots();
 650
 651                if (!data_received && slot->local != NULL) {
 652                        current_pos = ftell(slot->local);
 653                        if (current_pos > last_pos)
 654                                data_received++;
 655                        last_pos = current_pos;
 656                }
 657
 658                if (slot->in_use && !data_received) {
 659                        max_fd = 0;
 660                        FD_ZERO(&readfds);
 661                        FD_ZERO(&writefds);
 662                        FD_ZERO(&excfds);
 663                        select_timeout.tv_sec = 0;
 664                        select_timeout.tv_usec = 50000;
 665                        select(max_fd, &readfds, &writefds,
 666                               &excfds, &select_timeout);
 667                }
 668        }
 669#else
 670        while (slot->in_use) {
 671                slot->curl_result = curl_easy_perform(slot->curl);
 672                finish_active_slot(slot);
 673        }
 674#endif
 675}
 676
 677static void closedown_active_slot(struct active_request_slot *slot)
 678{
 679        active_requests--;
 680        slot->in_use = 0;
 681}
 682
 683static void release_active_slot(struct active_request_slot *slot)
 684{
 685        closedown_active_slot(slot);
 686        if (slot->curl && curl_session_count > min_curl_sessions) {
 687#ifdef USE_CURL_MULTI
 688                curl_multi_remove_handle(curlm, slot->curl);
 689#endif
 690                curl_easy_cleanup(slot->curl);
 691                slot->curl = NULL;
 692                curl_session_count--;
 693        }
 694#ifdef USE_CURL_MULTI
 695        fill_active_slots();
 696#endif
 697}
 698
 699void finish_active_slot(struct active_request_slot *slot)
 700{
 701        closedown_active_slot(slot);
 702        curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 703
 704        if (slot->finished != NULL)
 705                (*slot->finished) = 1;
 706
 707        /* Store slot results so they can be read after the slot is reused */
 708        if (slot->results != NULL) {
 709                slot->results->curl_result = slot->curl_result;
 710                slot->results->http_code = slot->http_code;
 711        }
 712
 713        /* Run callback if appropriate */
 714        if (slot->callback_func != NULL)
 715                slot->callback_func(slot->callback_data);
 716}
 717
 718void finish_all_active_slots(void)
 719{
 720        struct active_request_slot *slot = active_queue_head;
 721
 722        while (slot != NULL)
 723                if (slot->in_use) {
 724                        run_active_slot(slot);
 725                        slot = active_queue_head;
 726                } else {
 727                        slot = slot->next;
 728                }
 729}
 730
 731/* Helpers for modifying and creating URLs */
 732static inline int needs_quote(int ch)
 733{
 734        if (((ch >= 'A') && (ch <= 'Z'))
 735                        || ((ch >= 'a') && (ch <= 'z'))
 736                        || ((ch >= '0') && (ch <= '9'))
 737                        || (ch == '/')
 738                        || (ch == '-')
 739                        || (ch == '.'))
 740                return 0;
 741        return 1;
 742}
 743
 744static inline int hex(int v)
 745{
 746        if (v < 10)
 747                return '0' + v;
 748        else
 749                return 'A' + v - 10;
 750}
 751
 752static char *quote_ref_url(const char *base, const char *ref)
 753{
 754        struct strbuf buf = STRBUF_INIT;
 755        const char *cp;
 756        int ch;
 757
 758        end_url_with_slash(&buf, base);
 759
 760        for (cp = ref; (ch = *cp) != 0; cp++)
 761                if (needs_quote(ch))
 762                        strbuf_addf(&buf, "%%%02x", ch);
 763                else
 764                        strbuf_addch(&buf, *cp);
 765
 766        return strbuf_detach(&buf, NULL);
 767}
 768
 769void append_remote_object_url(struct strbuf *buf, const char *url,
 770                              const char *hex,
 771                              int only_two_digit_prefix)
 772{
 773        end_url_with_slash(buf, url);
 774
 775        strbuf_addf(buf, "objects/%.*s/", 2, hex);
 776        if (!only_two_digit_prefix)
 777                strbuf_addf(buf, "%s", hex+2);
 778}
 779
 780char *get_remote_object_url(const char *url, const char *hex,
 781                            int only_two_digit_prefix)
 782{
 783        struct strbuf buf = STRBUF_INIT;
 784        append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 785        return strbuf_detach(&buf, NULL);
 786}
 787
 788/* http_request() targets */
 789#define HTTP_REQUEST_STRBUF     0
 790#define HTTP_REQUEST_FILE       1
 791
 792static int http_request(const char *url, void *result, int target, int options)
 793{
 794        struct active_request_slot *slot;
 795        struct slot_results results;
 796        struct curl_slist *headers = NULL;
 797        struct strbuf buf = STRBUF_INIT;
 798        int ret;
 799
 800        slot = get_active_slot();
 801        slot->results = &results;
 802        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 803
 804        if (result == NULL) {
 805                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 806        } else {
 807                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 808                curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 809
 810                if (target == HTTP_REQUEST_FILE) {
 811                        long posn = ftell(result);
 812                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 813                                         fwrite);
 814                        if (posn > 0) {
 815                                strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 816                                headers = curl_slist_append(headers, buf.buf);
 817                                strbuf_reset(&buf);
 818                        }
 819                        slot->local = result;
 820                } else
 821                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 822                                         fwrite_buffer);
 823        }
 824
 825        strbuf_addstr(&buf, "Pragma:");
 826        if (options & HTTP_NO_CACHE)
 827                strbuf_addstr(&buf, " no-cache");
 828
 829        headers = curl_slist_append(headers, buf.buf);
 830
 831        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 832        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 833
 834        if (start_active_slot(slot)) {
 835                run_active_slot(slot);
 836                if (results.curl_result == CURLE_OK)
 837                        ret = HTTP_OK;
 838                else if (missing_target(&results))
 839                        ret = HTTP_MISSING_TARGET;
 840                else if (results.http_code == 401) {
 841                        if (user_name) {
 842                                ret = HTTP_NOAUTH;
 843                        } else {
 844                                /*
 845                                 * git_getpass is needed here because its very likely stdin/stdout are
 846                                 * pipes to our parent process.  So we instead need to use /dev/tty,
 847                                 * but that is non-portable.  Using git_getpass() can at least be stubbed
 848                                 * on other platforms with a different implementation if/when necessary.
 849                                 */
 850                                user_name = xstrdup(git_getpass("Username: "));
 851                                init_curl_http_auth(slot->curl);
 852                                ret = HTTP_REAUTH;
 853                        }
 854                } else {
 855                        if (!curl_errorstr[0])
 856                                strlcpy(curl_errorstr,
 857                                        curl_easy_strerror(results.curl_result),
 858                                        sizeof(curl_errorstr));
 859                        ret = HTTP_ERROR;
 860                }
 861        } else {
 862                error("Unable to start HTTP request for %s", url);
 863                ret = HTTP_START_FAILED;
 864        }
 865
 866        slot->local = NULL;
 867        curl_slist_free_all(headers);
 868        strbuf_release(&buf);
 869
 870        return ret;
 871}
 872
 873int http_get_strbuf(const char *url, struct strbuf *result, int options)
 874{
 875        int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 876        if (http_ret == HTTP_REAUTH) {
 877                http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 878        }
 879        return http_ret;
 880}
 881
 882/*
 883 * Downloads an url and stores the result in the given file.
 884 *
 885 * If a previous interrupted download is detected (i.e. a previous temporary
 886 * file is still around) the download is resumed.
 887 */
 888static int http_get_file(const char *url, const char *filename, int options)
 889{
 890        int ret;
 891        struct strbuf tmpfile = STRBUF_INIT;
 892        FILE *result;
 893
 894        strbuf_addf(&tmpfile, "%s.temp", filename);
 895        result = fopen(tmpfile.buf, "a");
 896        if (! result) {
 897                error("Unable to open local file %s", tmpfile.buf);
 898                ret = HTTP_ERROR;
 899                goto cleanup;
 900        }
 901
 902        ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 903        fclose(result);
 904
 905        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 906                ret = HTTP_ERROR;
 907cleanup:
 908        strbuf_release(&tmpfile);
 909        return ret;
 910}
 911
 912int http_error(const char *url, int ret)
 913{
 914        /* http_request has already handled HTTP_START_FAILED. */
 915        if (ret != HTTP_START_FAILED)
 916                error("%s while accessing %s", curl_errorstr, url);
 917
 918        return ret;
 919}
 920
 921int http_fetch_ref(const char *base, struct ref *ref)
 922{
 923        char *url;
 924        struct strbuf buffer = STRBUF_INIT;
 925        int ret = -1;
 926
 927        url = quote_ref_url(base, ref->name);
 928        if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 929                strbuf_rtrim(&buffer);
 930                if (buffer.len == 40)
 931                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 932                else if (!prefixcmp(buffer.buf, "ref: ")) {
 933                        ref->symref = xstrdup(buffer.buf + 5);
 934                        ret = 0;
 935                }
 936        }
 937
 938        strbuf_release(&buffer);
 939        free(url);
 940        return ret;
 941}
 942
 943/* Helpers for fetching packs */
 944static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 945{
 946        char *url, *tmp;
 947        struct strbuf buf = STRBUF_INIT;
 948
 949        if (http_is_verbose)
 950                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 951
 952        end_url_with_slash(&buf, base_url);
 953        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 954        url = strbuf_detach(&buf, NULL);
 955
 956        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 957        tmp = strbuf_detach(&buf, NULL);
 958
 959        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 960                error("Unable to get pack index %s\n", url);
 961                free(tmp);
 962                tmp = NULL;
 963        }
 964
 965        free(url);
 966        return tmp;
 967}
 968
 969static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 970        unsigned char *sha1, const char *base_url)
 971{
 972        struct packed_git *new_pack;
 973        char *tmp_idx = NULL;
 974        int ret;
 975
 976        if (has_pack_index(sha1)) {
 977                new_pack = parse_pack_index(sha1, NULL);
 978                if (!new_pack)
 979                        return -1; /* parse_pack_index() already issued error message */
 980                goto add_pack;
 981        }
 982
 983        tmp_idx = fetch_pack_index(sha1, base_url);
 984        if (!tmp_idx)
 985                return -1;
 986
 987        new_pack = parse_pack_index(sha1, tmp_idx);
 988        if (!new_pack) {
 989                unlink(tmp_idx);
 990                free(tmp_idx);
 991
 992                return -1; /* parse_pack_index() already issued error message */
 993        }
 994
 995        ret = verify_pack_index(new_pack);
 996        if (!ret) {
 997                close_pack_index(new_pack);
 998                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 999        }
1000        free(tmp_idx);
1001        if (ret)
1002                return -1;
1003
1004add_pack:
1005        new_pack->next = *packs_head;
1006        *packs_head = new_pack;
1007        return 0;
1008}
1009
1010int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1011{
1012        int ret = 0, i = 0;
1013        char *url, *data;
1014        struct strbuf buf = STRBUF_INIT;
1015        unsigned char sha1[20];
1016
1017        end_url_with_slash(&buf, base_url);
1018        strbuf_addstr(&buf, "objects/info/packs");
1019        url = strbuf_detach(&buf, NULL);
1020
1021        ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1022        if (ret != HTTP_OK)
1023                goto cleanup;
1024
1025        data = buf.buf;
1026        while (i < buf.len) {
1027                switch (data[i]) {
1028                case 'P':
1029                        i++;
1030                        if (i + 52 <= buf.len &&
1031                            !prefixcmp(data + i, " pack-") &&
1032                            !prefixcmp(data + i + 46, ".pack\n")) {
1033                                get_sha1_hex(data + i + 6, sha1);
1034                                fetch_and_setup_pack_index(packs_head, sha1,
1035                                                      base_url);
1036                                i += 51;
1037                                break;
1038                        }
1039                default:
1040                        while (i < buf.len && data[i] != '\n')
1041                                i++;
1042                }
1043                i++;
1044        }
1045
1046cleanup:
1047        free(url);
1048        return ret;
1049}
1050
1051void release_http_pack_request(struct http_pack_request *preq)
1052{
1053        if (preq->packfile != NULL) {
1054                fclose(preq->packfile);
1055                preq->packfile = NULL;
1056                preq->slot->local = NULL;
1057        }
1058        if (preq->range_header != NULL) {
1059                curl_slist_free_all(preq->range_header);
1060                preq->range_header = NULL;
1061        }
1062        preq->slot = NULL;
1063        free(preq->url);
1064}
1065
1066int finish_http_pack_request(struct http_pack_request *preq)
1067{
1068        struct packed_git **lst;
1069        struct packed_git *p = preq->target;
1070        char *tmp_idx;
1071        struct child_process ip;
1072        const char *ip_argv[8];
1073
1074        close_pack_index(p);
1075
1076        fclose(preq->packfile);
1077        preq->packfile = NULL;
1078        preq->slot->local = NULL;
1079
1080        lst = preq->lst;
1081        while (*lst != p)
1082                lst = &((*lst)->next);
1083        *lst = (*lst)->next;
1084
1085        tmp_idx = xstrdup(preq->tmpfile);
1086        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1087               ".idx.temp");
1088
1089        ip_argv[0] = "index-pack";
1090        ip_argv[1] = "-o";
1091        ip_argv[2] = tmp_idx;
1092        ip_argv[3] = preq->tmpfile;
1093        ip_argv[4] = NULL;
1094
1095        memset(&ip, 0, sizeof(ip));
1096        ip.argv = ip_argv;
1097        ip.git_cmd = 1;
1098        ip.no_stdin = 1;
1099        ip.no_stdout = 1;
1100
1101        if (run_command(&ip)) {
1102                unlink(preq->tmpfile);
1103                unlink(tmp_idx);
1104                free(tmp_idx);
1105                return -1;
1106        }
1107
1108        unlink(sha1_pack_index_name(p->sha1));
1109
1110        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1111         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1112                free(tmp_idx);
1113                return -1;
1114        }
1115
1116        install_packed_git(p);
1117        free(tmp_idx);
1118        return 0;
1119}
1120
1121struct http_pack_request *new_http_pack_request(
1122        struct packed_git *target, const char *base_url)
1123{
1124        long prev_posn = 0;
1125        char range[RANGE_HEADER_SIZE];
1126        struct strbuf buf = STRBUF_INIT;
1127        struct http_pack_request *preq;
1128
1129        preq = xcalloc(1, sizeof(*preq));
1130        preq->target = target;
1131
1132        end_url_with_slash(&buf, base_url);
1133        strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1134                sha1_to_hex(target->sha1));
1135        preq->url = strbuf_detach(&buf, NULL);
1136
1137        snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1138                sha1_pack_name(target->sha1));
1139        preq->packfile = fopen(preq->tmpfile, "a");
1140        if (!preq->packfile) {
1141                error("Unable to open local file %s for pack",
1142                      preq->tmpfile);
1143                goto abort;
1144        }
1145
1146        preq->slot = get_active_slot();
1147        preq->slot->local = preq->packfile;
1148        curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1149        curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1150        curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1151        curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1152                no_pragma_header);
1153
1154        /*
1155         * If there is data present from a previous transfer attempt,
1156         * resume where it left off
1157         */
1158        prev_posn = ftell(preq->packfile);
1159        if (prev_posn>0) {
1160                if (http_is_verbose)
1161                        fprintf(stderr,
1162                                "Resuming fetch of pack %s at byte %ld\n",
1163                                sha1_to_hex(target->sha1), prev_posn);
1164                sprintf(range, "Range: bytes=%ld-", prev_posn);
1165                preq->range_header = curl_slist_append(NULL, range);
1166                curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1167                        preq->range_header);
1168        }
1169
1170        return preq;
1171
1172abort:
1173        free(preq->url);
1174        free(preq);
1175        return NULL;
1176}
1177
1178/* Helpers for fetching objects (loose) */
1179static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1180                               void *data)
1181{
1182        unsigned char expn[4096];
1183        size_t size = eltsize * nmemb;
1184        int posn = 0;
1185        struct http_object_request *freq =
1186                (struct http_object_request *)data;
1187        do {
1188                ssize_t retval = xwrite(freq->localfile,
1189                                        (char *) ptr + posn, size - posn);
1190                if (retval < 0)
1191                        return posn;
1192                posn += retval;
1193        } while (posn < size);
1194
1195        freq->stream.avail_in = size;
1196        freq->stream.next_in = (void *)ptr;
1197        do {
1198                freq->stream.next_out = expn;
1199                freq->stream.avail_out = sizeof(expn);
1200                freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1201                git_SHA1_Update(&freq->c, expn,
1202                                sizeof(expn) - freq->stream.avail_out);
1203        } while (freq->stream.avail_in && freq->zret == Z_OK);
1204        data_received++;
1205        return size;
1206}
1207
1208struct http_object_request *new_http_object_request(const char *base_url,
1209        unsigned char *sha1)
1210{
1211        char *hex = sha1_to_hex(sha1);
1212        char *filename;
1213        char prevfile[PATH_MAX];
1214        int prevlocal;
1215        char prev_buf[PREV_BUF_SIZE];
1216        ssize_t prev_read = 0;
1217        long prev_posn = 0;
1218        char range[RANGE_HEADER_SIZE];
1219        struct curl_slist *range_header = NULL;
1220        struct http_object_request *freq;
1221
1222        freq = xcalloc(1, sizeof(*freq));
1223        hashcpy(freq->sha1, sha1);
1224        freq->localfile = -1;
1225
1226        filename = sha1_file_name(sha1);
1227        snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1228                 "%s.temp", filename);
1229
1230        snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1231        unlink_or_warn(prevfile);
1232        rename(freq->tmpfile, prevfile);
1233        unlink_or_warn(freq->tmpfile);
1234
1235        if (freq->localfile != -1)
1236                error("fd leakage in start: %d", freq->localfile);
1237        freq->localfile = open(freq->tmpfile,
1238                               O_WRONLY | O_CREAT | O_EXCL, 0666);
1239        /*
1240         * This could have failed due to the "lazy directory creation";
1241         * try to mkdir the last path component.
1242         */
1243        if (freq->localfile < 0 && errno == ENOENT) {
1244                char *dir = strrchr(freq->tmpfile, '/');
1245                if (dir) {
1246                        *dir = 0;
1247                        mkdir(freq->tmpfile, 0777);
1248                        *dir = '/';
1249                }
1250                freq->localfile = open(freq->tmpfile,
1251                                       O_WRONLY | O_CREAT | O_EXCL, 0666);
1252        }
1253
1254        if (freq->localfile < 0) {
1255                error("Couldn't create temporary file %s: %s",
1256                      freq->tmpfile, strerror(errno));
1257                goto abort;
1258        }
1259
1260        git_inflate_init(&freq->stream);
1261
1262        git_SHA1_Init(&freq->c);
1263
1264        freq->url = get_remote_object_url(base_url, hex, 0);
1265
1266        /*
1267         * If a previous temp file is present, process what was already
1268         * fetched.
1269         */
1270        prevlocal = open(prevfile, O_RDONLY);
1271        if (prevlocal != -1) {
1272                do {
1273                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1274                        if (prev_read>0) {
1275                                if (fwrite_sha1_file(prev_buf,
1276                                                     1,
1277                                                     prev_read,
1278                                                     freq) == prev_read) {
1279                                        prev_posn += prev_read;
1280                                } else {
1281                                        prev_read = -1;
1282                                }
1283                        }
1284                } while (prev_read > 0);
1285                close(prevlocal);
1286        }
1287        unlink_or_warn(prevfile);
1288
1289        /*
1290         * Reset inflate/SHA1 if there was an error reading the previous temp
1291         * file; also rewind to the beginning of the local file.
1292         */
1293        if (prev_read == -1) {
1294                memset(&freq->stream, 0, sizeof(freq->stream));
1295                git_inflate_init(&freq->stream);
1296                git_SHA1_Init(&freq->c);
1297                if (prev_posn>0) {
1298                        prev_posn = 0;
1299                        lseek(freq->localfile, 0, SEEK_SET);
1300                        if (ftruncate(freq->localfile, 0) < 0) {
1301                                error("Couldn't truncate temporary file %s: %s",
1302                                          freq->tmpfile, strerror(errno));
1303                                goto abort;
1304                        }
1305                }
1306        }
1307
1308        freq->slot = get_active_slot();
1309
1310        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1311        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1312        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1313        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1314        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1315
1316        /*
1317         * If we have successfully processed data from a previous fetch
1318         * attempt, only fetch the data we don't already have.
1319         */
1320        if (prev_posn>0) {
1321                if (http_is_verbose)
1322                        fprintf(stderr,
1323                                "Resuming fetch of object %s at byte %ld\n",
1324                                hex, prev_posn);
1325                sprintf(range, "Range: bytes=%ld-", prev_posn);
1326                range_header = curl_slist_append(range_header, range);
1327                curl_easy_setopt(freq->slot->curl,
1328                                 CURLOPT_HTTPHEADER, range_header);
1329        }
1330
1331        return freq;
1332
1333abort:
1334        free(freq->url);
1335        free(freq);
1336        return NULL;
1337}
1338
1339void process_http_object_request(struct http_object_request *freq)
1340{
1341        if (freq->slot == NULL)
1342                return;
1343        freq->curl_result = freq->slot->curl_result;
1344        freq->http_code = freq->slot->http_code;
1345        freq->slot = NULL;
1346}
1347
1348int finish_http_object_request(struct http_object_request *freq)
1349{
1350        struct stat st;
1351
1352        close(freq->localfile);
1353        freq->localfile = -1;
1354
1355        process_http_object_request(freq);
1356
1357        if (freq->http_code == 416) {
1358                warning("requested range invalid; we may already have all the data.");
1359        } else if (freq->curl_result != CURLE_OK) {
1360                if (stat(freq->tmpfile, &st) == 0)
1361                        if (st.st_size == 0)
1362                                unlink_or_warn(freq->tmpfile);
1363                return -1;
1364        }
1365
1366        git_inflate_end(&freq->stream);
1367        git_SHA1_Final(freq->real_sha1, &freq->c);
1368        if (freq->zret != Z_STREAM_END) {
1369                unlink_or_warn(freq->tmpfile);
1370                return -1;
1371        }
1372        if (hashcmp(freq->sha1, freq->real_sha1)) {
1373                unlink_or_warn(freq->tmpfile);
1374                return -1;
1375        }
1376        freq->rename =
1377                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1378
1379        return freq->rename;
1380}
1381
1382void abort_http_object_request(struct http_object_request *freq)
1383{
1384        unlink_or_warn(freq->tmpfile);
1385
1386        release_http_object_request(freq);
1387}
1388
1389void release_http_object_request(struct http_object_request *freq)
1390{
1391        if (freq->localfile != -1) {
1392                close(freq->localfile);
1393                freq->localfile = -1;
1394        }
1395        if (freq->url != NULL) {
1396                free(freq->url);
1397                freq->url = NULL;
1398        }
1399        if (freq->slot != NULL) {
1400                freq->slot->callback_func = NULL;
1401                freq->slot->callback_data = NULL;
1402                release_active_slot(freq->slot);
1403                freq->slot = NULL;
1404        }
1405}