Andrew's git / gitweb.git / http.c
?
http.con commit fast-import: don't fail on omitted committer name (17fb007)
   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 char *user_name, *user_pass;
  45static const char *user_agent;
  46
  47#if LIBCURL_VERSION_NUM >= 0x071700
  48/* Use CURLOPT_KEYPASSWD as is */
  49#elif LIBCURL_VERSION_NUM >= 0x070903
  50#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  51#else
  52#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  53#endif
  54
  55static char *ssl_cert_password;
  56static int ssl_cert_password_required;
  57
  58static struct curl_slist *pragma_header;
  59static struct curl_slist *no_pragma_header;
  60
  61static struct active_request_slot *active_queue_head;
  62
  63size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  64{
  65        size_t size = eltsize * nmemb;
  66        struct buffer *buffer = buffer_;
  67
  68        if (size > buffer->buf.len - buffer->posn)
  69                size = buffer->buf.len - buffer->posn;
  70        memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  71        buffer->posn += size;
  72
  73        return size;
  74}
  75
  76#ifndef NO_CURL_IOCTL
  77curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  78{
  79        struct buffer *buffer = clientp;
  80
  81        switch (cmd) {
  82        case CURLIOCMD_NOP:
  83                return CURLIOE_OK;
  84
  85        case CURLIOCMD_RESTARTREAD:
  86                buffer->posn = 0;
  87                return CURLIOE_OK;
  88
  89        default:
  90                return CURLIOE_UNKNOWNCMD;
  91        }
  92}
  93#endif
  94
  95size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  96{
  97        size_t size = eltsize * nmemb;
  98        struct strbuf *buffer = buffer_;
  99
 100        strbuf_add(buffer, ptr, size);
 101        data_received++;
 102        return size;
 103}
 104
 105size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 106{
 107        data_received++;
 108        return eltsize * nmemb;
 109}
 110
 111#ifdef USE_CURL_MULTI
 112static void process_curl_messages(void)
 113{
 114        int num_messages;
 115        struct active_request_slot *slot;
 116        CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 117
 118        while (curl_message != NULL) {
 119                if (curl_message->msg == CURLMSG_DONE) {
 120                        int curl_result = curl_message->data.result;
 121                        slot = active_queue_head;
 122                        while (slot != NULL &&
 123                               slot->curl != curl_message->easy_handle)
 124                                slot = slot->next;
 125                        if (slot != NULL) {
 126                                curl_multi_remove_handle(curlm, slot->curl);
 127                                slot->curl_result = curl_result;
 128                                finish_active_slot(slot);
 129                        } else {
 130                                fprintf(stderr, "Received DONE message for unknown request!\n");
 131                        }
 132                } else {
 133                        fprintf(stderr, "Unknown CURL message received: %d\n",
 134                                (int)curl_message->msg);
 135                }
 136                curl_message = curl_multi_info_read(curlm, &num_messages);
 137        }
 138}
 139#endif
 140
 141static int http_options(const char *var, const char *value, void *cb)
 142{
 143        if (!strcmp("http.sslverify", var)) {
 144                curl_ssl_verify = git_config_bool(var, value);
 145                return 0;
 146        }
 147        if (!strcmp("http.sslcert", var))
 148                return git_config_string(&ssl_cert, var, value);
 149#if LIBCURL_VERSION_NUM >= 0x070903
 150        if (!strcmp("http.sslkey", var))
 151                return git_config_string(&ssl_key, var, value);
 152#endif
 153#if LIBCURL_VERSION_NUM >= 0x070908
 154        if (!strcmp("http.sslcapath", var))
 155                return git_config_string(&ssl_capath, var, value);
 156#endif
 157        if (!strcmp("http.sslcainfo", var))
 158                return git_config_string(&ssl_cainfo, var, value);
 159        if (!strcmp("http.sslcertpasswordprotected", var)) {
 160                if (git_config_bool(var, value))
 161                        ssl_cert_password_required = 1;
 162                return 0;
 163        }
 164        if (!strcmp("http.minsessions", var)) {
 165                min_curl_sessions = git_config_int(var, value);
 166#ifndef USE_CURL_MULTI
 167                if (min_curl_sessions > 1)
 168                        min_curl_sessions = 1;
 169#endif
 170                return 0;
 171        }
 172#ifdef USE_CURL_MULTI
 173        if (!strcmp("http.maxrequests", var)) {
 174                max_requests = git_config_int(var, value);
 175                return 0;
 176        }
 177#endif
 178        if (!strcmp("http.lowspeedlimit", var)) {
 179                curl_low_speed_limit = (long)git_config_int(var, value);
 180                return 0;
 181        }
 182        if (!strcmp("http.lowspeedtime", var)) {
 183                curl_low_speed_time = (long)git_config_int(var, value);
 184                return 0;
 185        }
 186
 187        if (!strcmp("http.noepsv", var)) {
 188                curl_ftp_no_epsv = git_config_bool(var, value);
 189                return 0;
 190        }
 191        if (!strcmp("http.proxy", var))
 192                return git_config_string(&curl_http_proxy, var, value);
 193
 194        if (!strcmp("http.postbuffer", var)) {
 195                http_post_buffer = git_config_int(var, value);
 196                if (http_post_buffer < LARGE_PACKET_MAX)
 197                        http_post_buffer = LARGE_PACKET_MAX;
 198                return 0;
 199        }
 200
 201        if (!strcmp("http.useragent", var))
 202                return git_config_string(&user_agent, var, value);
 203
 204        /* Fall back on the default ones */
 205        return git_default_config(var, value, cb);
 206}
 207
 208static void init_curl_http_auth(CURL *result)
 209{
 210        if (user_name) {
 211                struct strbuf up = STRBUF_INIT;
 212                if (!user_pass)
 213                        user_pass = xstrdup(git_getpass("Password: "));
 214                strbuf_addf(&up, "%s:%s", user_name, user_pass);
 215                curl_easy_setopt(result, CURLOPT_USERPWD,
 216                                 strbuf_detach(&up, NULL));
 217        }
 218}
 219
 220static int has_cert_password(void)
 221{
 222        if (ssl_cert_password != NULL)
 223                return 1;
 224        if (ssl_cert == NULL || ssl_cert_password_required != 1)
 225                return 0;
 226        /* Only prompt the user once. */
 227        ssl_cert_password_required = -1;
 228        ssl_cert_password = git_getpass("Certificate Password: ");
 229        if (ssl_cert_password != NULL) {
 230                ssl_cert_password = xstrdup(ssl_cert_password);
 231                return 1;
 232        } else
 233                return 0;
 234}
 235
 236static CURL *get_curl_handle(void)
 237{
 238        CURL *result = curl_easy_init();
 239
 240        if (!curl_ssl_verify) {
 241                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 242                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 243        } else {
 244                /* Verify authenticity of the peer's certificate */
 245                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 246                /* The name in the cert must match whom we tried to connect */
 247                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 248        }
 249
 250#if LIBCURL_VERSION_NUM >= 0x070907
 251        curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 252#endif
 253#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 254        curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 255#endif
 256
 257        init_curl_http_auth(result);
 258
 259        if (ssl_cert != NULL)
 260                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 261        if (has_cert_password())
 262                curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 263#if LIBCURL_VERSION_NUM >= 0x070903
 264        if (ssl_key != NULL)
 265                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 266#endif
 267#if LIBCURL_VERSION_NUM >= 0x070908
 268        if (ssl_capath != NULL)
 269                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 270#endif
 271        if (ssl_cainfo != NULL)
 272                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 273        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 274
 275        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 276                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 277                                 curl_low_speed_limit);
 278                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 279                                 curl_low_speed_time);
 280        }
 281
 282        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 283#if LIBCURL_VERSION_NUM >= 0x071301
 284        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 285#elif LIBCURL_VERSION_NUM >= 0x071101
 286        curl_easy_setopt(result, CURLOPT_POST301, 1);
 287#endif
 288
 289        if (getenv("GIT_CURL_VERBOSE"))
 290                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 291
 292        curl_easy_setopt(result, CURLOPT_USERAGENT,
 293                user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 294
 295        if (curl_ftp_no_epsv)
 296                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 297
 298        if (curl_http_proxy)
 299                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 300
 301        return result;
 302}
 303
 304static void http_auth_init(const char *url)
 305{
 306        char *at, *colon, *cp, *slash, *decoded;
 307        int len;
 308
 309        cp = strstr(url, "://");
 310        if (!cp)
 311                return;
 312
 313        /*
 314         * Ok, the URL looks like "proto://something".  Which one?
 315         * "proto://<user>:<pass>@<host>/...",
 316         * "proto://<user>@<host>/...", or just
 317         * "proto://<host>/..."?
 318         */
 319        cp += 3;
 320        at = strchr(cp, '@');
 321        colon = strchr(cp, ':');
 322        slash = strchrnul(cp, '/');
 323        if (!at || slash <= at)
 324                return; /* No credentials */
 325        if (!colon || at <= colon) {
 326                /* Only username */
 327                len = at - cp;
 328                user_name = xmalloc(len + 1);
 329                memcpy(user_name, cp, len);
 330                user_name[len] = '\0';
 331                decoded = url_decode(user_name);
 332                free(user_name);
 333                user_name = decoded;
 334                user_pass = NULL;
 335        } else {
 336                len = colon - cp;
 337                user_name = xmalloc(len + 1);
 338                memcpy(user_name, cp, len);
 339                user_name[len] = '\0';
 340                decoded = url_decode(user_name);
 341                free(user_name);
 342                user_name = decoded;
 343                len = at - (colon + 1);
 344                user_pass = xmalloc(len + 1);
 345                memcpy(user_pass, colon + 1, len);
 346                user_pass[len] = '\0';
 347                decoded = url_decode(user_pass);
 348                free(user_pass);
 349                user_pass = decoded;
 350        }
 351}
 352
 353static void set_from_env(const char **var, const char *envname)
 354{
 355        const char *val = getenv(envname);
 356        if (val)
 357                *var = val;
 358}
 359
 360void http_init(struct remote *remote)
 361{
 362        char *low_speed_limit;
 363        char *low_speed_time;
 364
 365        http_is_verbose = 0;
 366
 367        git_config(http_options, NULL);
 368
 369        curl_global_init(CURL_GLOBAL_ALL);
 370
 371        if (remote && remote->http_proxy)
 372                curl_http_proxy = xstrdup(remote->http_proxy);
 373
 374        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 375        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 376
 377#ifdef USE_CURL_MULTI
 378        {
 379                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 380                if (http_max_requests != NULL)
 381                        max_requests = atoi(http_max_requests);
 382        }
 383
 384        curlm = curl_multi_init();
 385        if (curlm == NULL) {
 386                fprintf(stderr, "Error creating curl multi handle.\n");
 387                exit(1);
 388        }
 389#endif
 390
 391        if (getenv("GIT_SSL_NO_VERIFY"))
 392                curl_ssl_verify = 0;
 393
 394        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 395#if LIBCURL_VERSION_NUM >= 0x070903
 396        set_from_env(&ssl_key, "GIT_SSL_KEY");
 397#endif
 398#if LIBCURL_VERSION_NUM >= 0x070908
 399        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 400#endif
 401        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 402
 403        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 404
 405        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 406        if (low_speed_limit != NULL)
 407                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 408        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 409        if (low_speed_time != NULL)
 410                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 411
 412        if (curl_ssl_verify == -1)
 413                curl_ssl_verify = 1;
 414
 415        curl_session_count = 0;
 416#ifdef USE_CURL_MULTI
 417        if (max_requests < 1)
 418                max_requests = DEFAULT_MAX_REQUESTS;
 419#endif
 420
 421        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 422                curl_ftp_no_epsv = 1;
 423
 424        if (remote && remote->url && remote->url[0]) {
 425                http_auth_init(remote->url[0]);
 426                if (!ssl_cert_password_required &&
 427                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 428                    !prefixcmp(remote->url[0], "https://"))
 429                        ssl_cert_password_required = 1;
 430        }
 431
 432#ifndef NO_CURL_EASY_DUPHANDLE
 433        curl_default = get_curl_handle();
 434#endif
 435}
 436
 437void http_cleanup(void)
 438{
 439        struct active_request_slot *slot = active_queue_head;
 440
 441        while (slot != NULL) {
 442                struct active_request_slot *next = slot->next;
 443                if (slot->curl != NULL) {
 444#ifdef USE_CURL_MULTI
 445                        curl_multi_remove_handle(curlm, slot->curl);
 446#endif
 447                        curl_easy_cleanup(slot->curl);
 448                }
 449                free(slot);
 450                slot = next;
 451        }
 452        active_queue_head = NULL;
 453
 454#ifndef NO_CURL_EASY_DUPHANDLE
 455        curl_easy_cleanup(curl_default);
 456#endif
 457
 458#ifdef USE_CURL_MULTI
 459        curl_multi_cleanup(curlm);
 460#endif
 461        curl_global_cleanup();
 462
 463        curl_slist_free_all(pragma_header);
 464        pragma_header = NULL;
 465
 466        curl_slist_free_all(no_pragma_header);
 467        no_pragma_header = NULL;
 468
 469        if (curl_http_proxy) {
 470                free((void *)curl_http_proxy);
 471                curl_http_proxy = NULL;
 472        }
 473
 474        if (ssl_cert_password != NULL) {
 475                memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 476                free(ssl_cert_password);
 477                ssl_cert_password = NULL;
 478        }
 479        ssl_cert_password_required = 0;
 480}
 481
 482struct active_request_slot *get_active_slot(void)
 483{
 484        struct active_request_slot *slot = active_queue_head;
 485        struct active_request_slot *newslot;
 486
 487#ifdef USE_CURL_MULTI
 488        int num_transfers;
 489
 490        /* Wait for a slot to open up if the queue is full */
 491        while (active_requests >= max_requests) {
 492                curl_multi_perform(curlm, &num_transfers);
 493                if (num_transfers < active_requests)
 494                        process_curl_messages();
 495        }
 496#endif
 497
 498        while (slot != NULL && slot->in_use)
 499                slot = slot->next;
 500
 501        if (slot == NULL) {
 502                newslot = xmalloc(sizeof(*newslot));
 503                newslot->curl = NULL;
 504                newslot->in_use = 0;
 505                newslot->next = NULL;
 506
 507                slot = active_queue_head;
 508                if (slot == NULL) {
 509                        active_queue_head = newslot;
 510                } else {
 511                        while (slot->next != NULL)
 512                                slot = slot->next;
 513                        slot->next = newslot;
 514                }
 515                slot = newslot;
 516        }
 517
 518        if (slot->curl == NULL) {
 519#ifdef NO_CURL_EASY_DUPHANDLE
 520                slot->curl = get_curl_handle();
 521#else
 522                slot->curl = curl_easy_duphandle(curl_default);
 523#endif
 524                curl_session_count++;
 525        }
 526
 527        active_requests++;
 528        slot->in_use = 1;
 529        slot->local = NULL;
 530        slot->results = NULL;
 531        slot->finished = NULL;
 532        slot->callback_data = NULL;
 533        slot->callback_func = NULL;
 534        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 535        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 536        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 537        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 538        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 539        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 540        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 541        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 542
 543        return slot;
 544}
 545
 546int start_active_slot(struct active_request_slot *slot)
 547{
 548#ifdef USE_CURL_MULTI
 549        CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 550        int num_transfers;
 551
 552        if (curlm_result != CURLM_OK &&
 553            curlm_result != CURLM_CALL_MULTI_PERFORM) {
 554                active_requests--;
 555                slot->in_use = 0;
 556                return 0;
 557        }
 558
 559        /*
 560         * We know there must be something to do, since we just added
 561         * something.
 562         */
 563        curl_multi_perform(curlm, &num_transfers);
 564#endif
 565        return 1;
 566}
 567
 568#ifdef USE_CURL_MULTI
 569struct fill_chain {
 570        void *data;
 571        int (*fill)(void *);
 572        struct fill_chain *next;
 573};
 574
 575static struct fill_chain *fill_cfg;
 576
 577void add_fill_function(void *data, int (*fill)(void *))
 578{
 579        struct fill_chain *new = xmalloc(sizeof(*new));
 580        struct fill_chain **linkp = &fill_cfg;
 581        new->data = data;
 582        new->fill = fill;
 583        new->next = NULL;
 584        while (*linkp)
 585                linkp = &(*linkp)->next;
 586        *linkp = new;
 587}
 588
 589void fill_active_slots(void)
 590{
 591        struct active_request_slot *slot = active_queue_head;
 592
 593        while (active_requests < max_requests) {
 594                struct fill_chain *fill;
 595                for (fill = fill_cfg; fill; fill = fill->next)
 596                        if (fill->fill(fill->data))
 597                                break;
 598
 599                if (!fill)
 600                        break;
 601        }
 602
 603        while (slot != NULL) {
 604                if (!slot->in_use && slot->curl != NULL
 605                        && curl_session_count > min_curl_sessions) {
 606                        curl_easy_cleanup(slot->curl);
 607                        slot->curl = NULL;
 608                        curl_session_count--;
 609                }
 610                slot = slot->next;
 611        }
 612}
 613
 614void step_active_slots(void)
 615{
 616        int num_transfers;
 617        CURLMcode curlm_result;
 618
 619        do {
 620                curlm_result = curl_multi_perform(curlm, &num_transfers);
 621        } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 622        if (num_transfers < active_requests) {
 623                process_curl_messages();
 624                fill_active_slots();
 625        }
 626}
 627#endif
 628
 629void run_active_slot(struct active_request_slot *slot)
 630{
 631#ifdef USE_CURL_MULTI
 632        long last_pos = 0;
 633        long current_pos;
 634        fd_set readfds;
 635        fd_set writefds;
 636        fd_set excfds;
 637        int max_fd;
 638        struct timeval select_timeout;
 639        int finished = 0;
 640
 641        slot->finished = &finished;
 642        while (!finished) {
 643                data_received = 0;
 644                step_active_slots();
 645
 646                if (!data_received && slot->local != NULL) {
 647                        current_pos = ftell(slot->local);
 648                        if (current_pos > last_pos)
 649                                data_received++;
 650                        last_pos = current_pos;
 651                }
 652
 653                if (slot->in_use && !data_received) {
 654                        max_fd = 0;
 655                        FD_ZERO(&readfds);
 656                        FD_ZERO(&writefds);
 657                        FD_ZERO(&excfds);
 658                        select_timeout.tv_sec = 0;
 659                        select_timeout.tv_usec = 50000;
 660                        select(max_fd, &readfds, &writefds,
 661                               &excfds, &select_timeout);
 662                }
 663        }
 664#else
 665        while (slot->in_use) {
 666                slot->curl_result = curl_easy_perform(slot->curl);
 667                finish_active_slot(slot);
 668        }
 669#endif
 670}
 671
 672static void closedown_active_slot(struct active_request_slot *slot)
 673{
 674        active_requests--;
 675        slot->in_use = 0;
 676}
 677
 678static void release_active_slot(struct active_request_slot *slot)
 679{
 680        closedown_active_slot(slot);
 681        if (slot->curl && curl_session_count > min_curl_sessions) {
 682#ifdef USE_CURL_MULTI
 683                curl_multi_remove_handle(curlm, slot->curl);
 684#endif
 685                curl_easy_cleanup(slot->curl);
 686                slot->curl = NULL;
 687                curl_session_count--;
 688        }
 689#ifdef USE_CURL_MULTI
 690        fill_active_slots();
 691#endif
 692}
 693
 694void finish_active_slot(struct active_request_slot *slot)
 695{
 696        closedown_active_slot(slot);
 697        curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 698
 699        if (slot->finished != NULL)
 700                (*slot->finished) = 1;
 701
 702        /* Store slot results so they can be read after the slot is reused */
 703        if (slot->results != NULL) {
 704                slot->results->curl_result = slot->curl_result;
 705                slot->results->http_code = slot->http_code;
 706        }
 707
 708        /* Run callback if appropriate */
 709        if (slot->callback_func != NULL)
 710                slot->callback_func(slot->callback_data);
 711}
 712
 713void finish_all_active_slots(void)
 714{
 715        struct active_request_slot *slot = active_queue_head;
 716
 717        while (slot != NULL)
 718                if (slot->in_use) {
 719                        run_active_slot(slot);
 720                        slot = active_queue_head;
 721                } else {
 722                        slot = slot->next;
 723                }
 724}
 725
 726/* Helpers for modifying and creating URLs */
 727static inline int needs_quote(int ch)
 728{
 729        if (((ch >= 'A') && (ch <= 'Z'))
 730                        || ((ch >= 'a') && (ch <= 'z'))
 731                        || ((ch >= '0') && (ch <= '9'))
 732                        || (ch == '/')
 733                        || (ch == '-')
 734                        || (ch == '.'))
 735                return 0;
 736        return 1;
 737}
 738
 739static inline int hex(int v)
 740{
 741        if (v < 10)
 742                return '0' + v;
 743        else
 744                return 'A' + v - 10;
 745}
 746
 747static char *quote_ref_url(const char *base, const char *ref)
 748{
 749        struct strbuf buf = STRBUF_INIT;
 750        const char *cp;
 751        int ch;
 752
 753        end_url_with_slash(&buf, base);
 754
 755        for (cp = ref; (ch = *cp) != 0; cp++)
 756                if (needs_quote(ch))
 757                        strbuf_addf(&buf, "%%%02x", ch);
 758                else
 759                        strbuf_addch(&buf, *cp);
 760
 761        return strbuf_detach(&buf, NULL);
 762}
 763
 764void append_remote_object_url(struct strbuf *buf, const char *url,
 765                              const char *hex,
 766                              int only_two_digit_prefix)
 767{
 768        end_url_with_slash(buf, url);
 769
 770        strbuf_addf(buf, "objects/%.*s/", 2, hex);
 771        if (!only_two_digit_prefix)
 772                strbuf_addf(buf, "%s", hex+2);
 773}
 774
 775char *get_remote_object_url(const char *url, const char *hex,
 776                            int only_two_digit_prefix)
 777{
 778        struct strbuf buf = STRBUF_INIT;
 779        append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 780        return strbuf_detach(&buf, NULL);
 781}
 782
 783/* http_request() targets */
 784#define HTTP_REQUEST_STRBUF     0
 785#define HTTP_REQUEST_FILE       1
 786
 787static int http_request(const char *url, void *result, int target, int options)
 788{
 789        struct active_request_slot *slot;
 790        struct slot_results results;
 791        struct curl_slist *headers = NULL;
 792        struct strbuf buf = STRBUF_INIT;
 793        int ret;
 794
 795        slot = get_active_slot();
 796        slot->results = &results;
 797        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 798
 799        if (result == NULL) {
 800                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 801        } else {
 802                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 803                curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 804
 805                if (target == HTTP_REQUEST_FILE) {
 806                        long posn = ftell(result);
 807                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 808                                         fwrite);
 809                        if (posn > 0) {
 810                                strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 811                                headers = curl_slist_append(headers, buf.buf);
 812                                strbuf_reset(&buf);
 813                        }
 814                        slot->local = result;
 815                } else
 816                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 817                                         fwrite_buffer);
 818        }
 819
 820        strbuf_addstr(&buf, "Pragma:");
 821        if (options & HTTP_NO_CACHE)
 822                strbuf_addstr(&buf, " no-cache");
 823
 824        headers = curl_slist_append(headers, buf.buf);
 825
 826        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 827        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 828
 829        if (start_active_slot(slot)) {
 830                run_active_slot(slot);
 831                if (results.curl_result == CURLE_OK)
 832                        ret = HTTP_OK;
 833                else if (missing_target(&results))
 834                        ret = HTTP_MISSING_TARGET;
 835                else if (results.http_code == 401) {
 836                        if (user_name) {
 837                                ret = HTTP_NOAUTH;
 838                        } else {
 839                                /*
 840                                 * git_getpass is needed here because its very likely stdin/stdout are
 841                                 * pipes to our parent process.  So we instead need to use /dev/tty,
 842                                 * but that is non-portable.  Using git_getpass() can at least be stubbed
 843                                 * on other platforms with a different implementation if/when necessary.
 844                                 */
 845                                user_name = xstrdup(git_getpass("Username: "));
 846                                init_curl_http_auth(slot->curl);
 847                                ret = HTTP_REAUTH;
 848                        }
 849                } else
 850                        ret = HTTP_ERROR;
 851        } else {
 852                error("Unable to start HTTP request for %s", url);
 853                ret = HTTP_START_FAILED;
 854        }
 855
 856        slot->local = NULL;
 857        curl_slist_free_all(headers);
 858        strbuf_release(&buf);
 859
 860        return ret;
 861}
 862
 863int http_get_strbuf(const char *url, struct strbuf *result, int options)
 864{
 865        int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 866        if (http_ret == HTTP_REAUTH) {
 867                http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 868        }
 869        return http_ret;
 870}
 871
 872/*
 873 * Downloads an url and stores the result in the given file.
 874 *
 875 * If a previous interrupted download is detected (i.e. a previous temporary
 876 * file is still around) the download is resumed.
 877 */
 878static int http_get_file(const char *url, const char *filename, int options)
 879{
 880        int ret;
 881        struct strbuf tmpfile = STRBUF_INIT;
 882        FILE *result;
 883
 884        strbuf_addf(&tmpfile, "%s.temp", filename);
 885        result = fopen(tmpfile.buf, "a");
 886        if (! result) {
 887                error("Unable to open local file %s", tmpfile.buf);
 888                ret = HTTP_ERROR;
 889                goto cleanup;
 890        }
 891
 892        ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 893        fclose(result);
 894
 895        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 896                ret = HTTP_ERROR;
 897cleanup:
 898        strbuf_release(&tmpfile);
 899        return ret;
 900}
 901
 902int http_error(const char *url, int ret)
 903{
 904        /* http_request has already handled HTTP_START_FAILED. */
 905        if (ret != HTTP_START_FAILED)
 906                error("%s while accessing %s\n", curl_errorstr, url);
 907
 908        return ret;
 909}
 910
 911int http_fetch_ref(const char *base, struct ref *ref)
 912{
 913        char *url;
 914        struct strbuf buffer = STRBUF_INIT;
 915        int ret = -1;
 916
 917        url = quote_ref_url(base, ref->name);
 918        if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 919                strbuf_rtrim(&buffer);
 920                if (buffer.len == 40)
 921                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 922                else if (!prefixcmp(buffer.buf, "ref: ")) {
 923                        ref->symref = xstrdup(buffer.buf + 5);
 924                        ret = 0;
 925                }
 926        }
 927
 928        strbuf_release(&buffer);
 929        free(url);
 930        return ret;
 931}
 932
 933/* Helpers for fetching packs */
 934static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 935{
 936        char *url, *tmp;
 937        struct strbuf buf = STRBUF_INIT;
 938
 939        if (http_is_verbose)
 940                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 941
 942        end_url_with_slash(&buf, base_url);
 943        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 944        url = strbuf_detach(&buf, NULL);
 945
 946        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 947        tmp = strbuf_detach(&buf, NULL);
 948
 949        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 950                error("Unable to get pack index %s\n", url);
 951                free(tmp);
 952                tmp = NULL;
 953        }
 954
 955        free(url);
 956        return tmp;
 957}
 958
 959static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 960        unsigned char *sha1, const char *base_url)
 961{
 962        struct packed_git *new_pack;
 963        char *tmp_idx = NULL;
 964        int ret;
 965
 966        if (has_pack_index(sha1)) {
 967                new_pack = parse_pack_index(sha1, NULL);
 968                if (!new_pack)
 969                        return -1; /* parse_pack_index() already issued error message */
 970                goto add_pack;
 971        }
 972
 973        tmp_idx = fetch_pack_index(sha1, base_url);
 974        if (!tmp_idx)
 975                return -1;
 976
 977        new_pack = parse_pack_index(sha1, tmp_idx);
 978        if (!new_pack) {
 979                unlink(tmp_idx);
 980                free(tmp_idx);
 981
 982                return -1; /* parse_pack_index() already issued error message */
 983        }
 984
 985        ret = verify_pack_index(new_pack);
 986        if (!ret) {
 987                close_pack_index(new_pack);
 988                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 989        }
 990        free(tmp_idx);
 991        if (ret)
 992                return -1;
 993
 994add_pack:
 995        new_pack->next = *packs_head;
 996        *packs_head = new_pack;
 997        return 0;
 998}
 999
1000int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1001{
1002        int ret = 0, i = 0;
1003        char *url, *data;
1004        struct strbuf buf = STRBUF_INIT;
1005        unsigned char sha1[20];
1006
1007        end_url_with_slash(&buf, base_url);
1008        strbuf_addstr(&buf, "objects/info/packs");
1009        url = strbuf_detach(&buf, NULL);
1010
1011        ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1012        if (ret != HTTP_OK)
1013                goto cleanup;
1014
1015        data = buf.buf;
1016        while (i < buf.len) {
1017                switch (data[i]) {
1018                case 'P':
1019                        i++;
1020                        if (i + 52 <= buf.len &&
1021                            !prefixcmp(data + i, " pack-") &&
1022                            !prefixcmp(data + i + 46, ".pack\n")) {
1023                                get_sha1_hex(data + i + 6, sha1);
1024                                fetch_and_setup_pack_index(packs_head, sha1,
1025                                                      base_url);
1026                                i += 51;
1027                                break;
1028                        }
1029                default:
1030                        while (i < buf.len && data[i] != '\n')
1031                                i++;
1032                }
1033                i++;
1034        }
1035
1036cleanup:
1037        free(url);
1038        return ret;
1039}
1040
1041void release_http_pack_request(struct http_pack_request *preq)
1042{
1043        if (preq->packfile != NULL) {
1044                fclose(preq->packfile);
1045                preq->packfile = NULL;
1046                preq->slot->local = NULL;
1047        }
1048        if (preq->range_header != NULL) {
1049                curl_slist_free_all(preq->range_header);
1050                preq->range_header = NULL;
1051        }
1052        preq->slot = NULL;
1053        free(preq->url);
1054}
1055
1056int finish_http_pack_request(struct http_pack_request *preq)
1057{
1058        struct packed_git **lst;
1059        struct packed_git *p = preq->target;
1060        char *tmp_idx;
1061        struct child_process ip;
1062        const char *ip_argv[8];
1063
1064        close_pack_index(p);
1065
1066        fclose(preq->packfile);
1067        preq->packfile = NULL;
1068        preq->slot->local = NULL;
1069
1070        lst = preq->lst;
1071        while (*lst != p)
1072                lst = &((*lst)->next);
1073        *lst = (*lst)->next;
1074
1075        tmp_idx = xstrdup(preq->tmpfile);
1076        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1077               ".idx.temp");
1078
1079        ip_argv[0] = "index-pack";
1080        ip_argv[1] = "-o";
1081        ip_argv[2] = tmp_idx;
1082        ip_argv[3] = preq->tmpfile;
1083        ip_argv[4] = NULL;
1084
1085        memset(&ip, 0, sizeof(ip));
1086        ip.argv = ip_argv;
1087        ip.git_cmd = 1;
1088        ip.no_stdin = 1;
1089        ip.no_stdout = 1;
1090
1091        if (run_command(&ip)) {
1092                unlink(preq->tmpfile);
1093                unlink(tmp_idx);
1094                free(tmp_idx);
1095                return -1;
1096        }
1097
1098        unlink(sha1_pack_index_name(p->sha1));
1099
1100        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1101         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1102                free(tmp_idx);
1103                return -1;
1104        }
1105
1106        install_packed_git(p);
1107        free(tmp_idx);
1108        return 0;
1109}
1110
1111struct http_pack_request *new_http_pack_request(
1112        struct packed_git *target, const char *base_url)
1113{
1114        long prev_posn = 0;
1115        char range[RANGE_HEADER_SIZE];
1116        struct strbuf buf = STRBUF_INIT;
1117        struct http_pack_request *preq;
1118
1119        preq = xmalloc(sizeof(*preq));
1120        preq->target = target;
1121        preq->range_header = NULL;
1122
1123        end_url_with_slash(&buf, base_url);
1124        strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1125                sha1_to_hex(target->sha1));
1126        preq->url = strbuf_detach(&buf, NULL);
1127
1128        snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1129                sha1_pack_name(target->sha1));
1130        preq->packfile = fopen(preq->tmpfile, "a");
1131        if (!preq->packfile) {
1132                error("Unable to open local file %s for pack",
1133                      preq->tmpfile);
1134                goto abort;
1135        }
1136
1137        preq->slot = get_active_slot();
1138        preq->slot->local = preq->packfile;
1139        curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1140        curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1141        curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1142        curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1143                no_pragma_header);
1144
1145        /*
1146         * If there is data present from a previous transfer attempt,
1147         * resume where it left off
1148         */
1149        prev_posn = ftell(preq->packfile);
1150        if (prev_posn>0) {
1151                if (http_is_verbose)
1152                        fprintf(stderr,
1153                                "Resuming fetch of pack %s at byte %ld\n",
1154                                sha1_to_hex(target->sha1), prev_posn);
1155                sprintf(range, "Range: bytes=%ld-", prev_posn);
1156                preq->range_header = curl_slist_append(NULL, range);
1157                curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1158                        preq->range_header);
1159        }
1160
1161        return preq;
1162
1163abort:
1164        free(preq->url);
1165        free(preq);
1166        return NULL;
1167}
1168
1169/* Helpers for fetching objects (loose) */
1170static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1171                               void *data)
1172{
1173        unsigned char expn[4096];
1174        size_t size = eltsize * nmemb;
1175        int posn = 0;
1176        struct http_object_request *freq =
1177                (struct http_object_request *)data;
1178        do {
1179                ssize_t retval = xwrite(freq->localfile,
1180                                        (char *) ptr + posn, size - posn);
1181                if (retval < 0)
1182                        return posn;
1183                posn += retval;
1184        } while (posn < size);
1185
1186        freq->stream.avail_in = size;
1187        freq->stream.next_in = (void *)ptr;
1188        do {
1189                freq->stream.next_out = expn;
1190                freq->stream.avail_out = sizeof(expn);
1191                freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1192                git_SHA1_Update(&freq->c, expn,
1193                                sizeof(expn) - freq->stream.avail_out);
1194        } while (freq->stream.avail_in && freq->zret == Z_OK);
1195        data_received++;
1196        return size;
1197}
1198
1199struct http_object_request *new_http_object_request(const char *base_url,
1200        unsigned char *sha1)
1201{
1202        char *hex = sha1_to_hex(sha1);
1203        char *filename;
1204        char prevfile[PATH_MAX];
1205        int prevlocal;
1206        char prev_buf[PREV_BUF_SIZE];
1207        ssize_t prev_read = 0;
1208        long prev_posn = 0;
1209        char range[RANGE_HEADER_SIZE];
1210        struct curl_slist *range_header = NULL;
1211        struct http_object_request *freq;
1212
1213        freq = xmalloc(sizeof(*freq));
1214        hashcpy(freq->sha1, sha1);
1215        freq->localfile = -1;
1216
1217        filename = sha1_file_name(sha1);
1218        snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1219                 "%s.temp", filename);
1220
1221        snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1222        unlink_or_warn(prevfile);
1223        rename(freq->tmpfile, prevfile);
1224        unlink_or_warn(freq->tmpfile);
1225
1226        if (freq->localfile != -1)
1227                error("fd leakage in start: %d", freq->localfile);
1228        freq->localfile = open(freq->tmpfile,
1229                               O_WRONLY | O_CREAT | O_EXCL, 0666);
1230        /*
1231         * This could have failed due to the "lazy directory creation";
1232         * try to mkdir the last path component.
1233         */
1234        if (freq->localfile < 0 && errno == ENOENT) {
1235                char *dir = strrchr(freq->tmpfile, '/');
1236                if (dir) {
1237                        *dir = 0;
1238                        mkdir(freq->tmpfile, 0777);
1239                        *dir = '/';
1240                }
1241                freq->localfile = open(freq->tmpfile,
1242                                       O_WRONLY | O_CREAT | O_EXCL, 0666);
1243        }
1244
1245        if (freq->localfile < 0) {
1246                error("Couldn't create temporary file %s: %s",
1247                      freq->tmpfile, strerror(errno));
1248                goto abort;
1249        }
1250
1251        memset(&freq->stream, 0, sizeof(freq->stream));
1252
1253        git_inflate_init(&freq->stream);
1254
1255        git_SHA1_Init(&freq->c);
1256
1257        freq->url = get_remote_object_url(base_url, hex, 0);
1258
1259        /*
1260         * If a previous temp file is present, process what was already
1261         * fetched.
1262         */
1263        prevlocal = open(prevfile, O_RDONLY);
1264        if (prevlocal != -1) {
1265                do {
1266                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1267                        if (prev_read>0) {
1268                                if (fwrite_sha1_file(prev_buf,
1269                                                     1,
1270                                                     prev_read,
1271                                                     freq) == prev_read) {
1272                                        prev_posn += prev_read;
1273                                } else {
1274                                        prev_read = -1;
1275                                }
1276                        }
1277                } while (prev_read > 0);
1278                close(prevlocal);
1279        }
1280        unlink_or_warn(prevfile);
1281
1282        /*
1283         * Reset inflate/SHA1 if there was an error reading the previous temp
1284         * file; also rewind to the beginning of the local file.
1285         */
1286        if (prev_read == -1) {
1287                memset(&freq->stream, 0, sizeof(freq->stream));
1288                git_inflate_init(&freq->stream);
1289                git_SHA1_Init(&freq->c);
1290                if (prev_posn>0) {
1291                        prev_posn = 0;
1292                        lseek(freq->localfile, 0, SEEK_SET);
1293                        if (ftruncate(freq->localfile, 0) < 0) {
1294                                error("Couldn't truncate temporary file %s: %s",
1295                                          freq->tmpfile, strerror(errno));
1296                                goto abort;
1297                        }
1298                }
1299        }
1300
1301        freq->slot = get_active_slot();
1302
1303        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1304        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1305        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1306        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1307        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1308
1309        /*
1310         * If we have successfully processed data from a previous fetch
1311         * attempt, only fetch the data we don't already have.
1312         */
1313        if (prev_posn>0) {
1314                if (http_is_verbose)
1315                        fprintf(stderr,
1316                                "Resuming fetch of object %s at byte %ld\n",
1317                                hex, prev_posn);
1318                sprintf(range, "Range: bytes=%ld-", prev_posn);
1319                range_header = curl_slist_append(range_header, range);
1320                curl_easy_setopt(freq->slot->curl,
1321                                 CURLOPT_HTTPHEADER, range_header);
1322        }
1323
1324        return freq;
1325
1326abort:
1327        free(filename);
1328        free(freq->url);
1329        free(freq);
1330        return NULL;
1331}
1332
1333void process_http_object_request(struct http_object_request *freq)
1334{
1335        if (freq->slot == NULL)
1336                return;
1337        freq->curl_result = freq->slot->curl_result;
1338        freq->http_code = freq->slot->http_code;
1339        freq->slot = NULL;
1340}
1341
1342int finish_http_object_request(struct http_object_request *freq)
1343{
1344        struct stat st;
1345
1346        close(freq->localfile);
1347        freq->localfile = -1;
1348
1349        process_http_object_request(freq);
1350
1351        if (freq->http_code == 416) {
1352                warning("requested range invalid; we may already have all the data.");
1353        } else if (freq->curl_result != CURLE_OK) {
1354                if (stat(freq->tmpfile, &st) == 0)
1355                        if (st.st_size == 0)
1356                                unlink_or_warn(freq->tmpfile);
1357                return -1;
1358        }
1359
1360        git_inflate_end(&freq->stream);
1361        git_SHA1_Final(freq->real_sha1, &freq->c);
1362        if (freq->zret != Z_STREAM_END) {
1363                unlink_or_warn(freq->tmpfile);
1364                return -1;
1365        }
1366        if (hashcmp(freq->sha1, freq->real_sha1)) {
1367                unlink_or_warn(freq->tmpfile);
1368                return -1;
1369        }
1370        freq->rename =
1371                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1372
1373        return freq->rename;
1374}
1375
1376void abort_http_object_request(struct http_object_request *freq)
1377{
1378        unlink_or_warn(freq->tmpfile);
1379
1380        release_http_object_request(freq);
1381}
1382
1383void release_http_object_request(struct http_object_request *freq)
1384{
1385        if (freq->localfile != -1) {
1386                close(freq->localfile);
1387                freq->localfile = -1;
1388        }
1389        if (freq->url != NULL) {
1390                free(freq->url);
1391                freq->url = NULL;
1392        }
1393        if (freq->slot != NULL) {
1394                freq->slot->callback_func = NULL;
1395                freq->slot->callback_data = NULL;
1396                release_active_slot(freq->slot);
1397                freq->slot = NULL;
1398        }
1399}