Andrew's git / gitweb.git / http.c
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http.con commit Merge branch 'tc/smart-http-post-redirect' into maint (d3334d9)
   1#include "http.h"
   2#include "pack.h"
   3#include "sideband.h"
   4#include "run-command.h"
   5
   6int data_received;
   7int active_requests;
   8int http_is_verbose;
   9size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  10
  11#if LIBCURL_VERSION_NUM >= 0x070a06
  12#define LIBCURL_CAN_HANDLE_AUTH_ANY
  13#endif
  14
  15static int min_curl_sessions = 1;
  16static int curl_session_count;
  17#ifdef USE_CURL_MULTI
  18static int max_requests = -1;
  19static CURLM *curlm;
  20#endif
  21#ifndef NO_CURL_EASY_DUPHANDLE
  22static CURL *curl_default;
  23#endif
  24
  25#define PREV_BUF_SIZE 4096
  26#define RANGE_HEADER_SIZE 30
  27
  28char curl_errorstr[CURL_ERROR_SIZE];
  29
  30static int curl_ssl_verify = -1;
  31static const char *ssl_cert;
  32#if LIBCURL_VERSION_NUM >= 0x070903
  33static const char *ssl_key;
  34#endif
  35#if LIBCURL_VERSION_NUM >= 0x070908
  36static const char *ssl_capath;
  37#endif
  38static const char *ssl_cainfo;
  39static long curl_low_speed_limit = -1;
  40static long curl_low_speed_time = -1;
  41static int curl_ftp_no_epsv;
  42static const char *curl_http_proxy;
  43static char *user_name, *user_pass;
  44static const char *user_agent;
  45
  46#if LIBCURL_VERSION_NUM >= 0x071700
  47/* Use CURLOPT_KEYPASSWD as is */
  48#elif LIBCURL_VERSION_NUM >= 0x070903
  49#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  50#else
  51#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  52#endif
  53
  54static char *ssl_cert_password;
  55static int ssl_cert_password_required;
  56
  57static struct curl_slist *pragma_header;
  58static struct curl_slist *no_pragma_header;
  59
  60static struct active_request_slot *active_queue_head;
  61
  62size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  63{
  64        size_t size = eltsize * nmemb;
  65        struct buffer *buffer = buffer_;
  66
  67        if (size > buffer->buf.len - buffer->posn)
  68                size = buffer->buf.len - buffer->posn;
  69        memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  70        buffer->posn += size;
  71
  72        return size;
  73}
  74
  75#ifndef NO_CURL_IOCTL
  76curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  77{
  78        struct buffer *buffer = clientp;
  79
  80        switch (cmd) {
  81        case CURLIOCMD_NOP:
  82                return CURLIOE_OK;
  83
  84        case CURLIOCMD_RESTARTREAD:
  85                buffer->posn = 0;
  86                return CURLIOE_OK;
  87
  88        default:
  89                return CURLIOE_UNKNOWNCMD;
  90        }
  91}
  92#endif
  93
  94size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  95{
  96        size_t size = eltsize * nmemb;
  97        struct strbuf *buffer = buffer_;
  98
  99        strbuf_add(buffer, ptr, size);
 100        data_received++;
 101        return size;
 102}
 103
 104size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 105{
 106        data_received++;
 107        return eltsize * nmemb;
 108}
 109
 110#ifdef USE_CURL_MULTI
 111static void process_curl_messages(void)
 112{
 113        int num_messages;
 114        struct active_request_slot *slot;
 115        CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 116
 117        while (curl_message != NULL) {
 118                if (curl_message->msg == CURLMSG_DONE) {
 119                        int curl_result = curl_message->data.result;
 120                        slot = active_queue_head;
 121                        while (slot != NULL &&
 122                               slot->curl != curl_message->easy_handle)
 123                                slot = slot->next;
 124                        if (slot != NULL) {
 125                                curl_multi_remove_handle(curlm, slot->curl);
 126                                slot->curl_result = curl_result;
 127                                finish_active_slot(slot);
 128                        } else {
 129                                fprintf(stderr, "Received DONE message for unknown request!\n");
 130                        }
 131                } else {
 132                        fprintf(stderr, "Unknown CURL message received: %d\n",
 133                                (int)curl_message->msg);
 134                }
 135                curl_message = curl_multi_info_read(curlm, &num_messages);
 136        }
 137}
 138#endif
 139
 140static int http_options(const char *var, const char *value, void *cb)
 141{
 142        if (!strcmp("http.sslverify", var)) {
 143                curl_ssl_verify = git_config_bool(var, value);
 144                return 0;
 145        }
 146        if (!strcmp("http.sslcert", var))
 147                return git_config_string(&ssl_cert, var, value);
 148#if LIBCURL_VERSION_NUM >= 0x070903
 149        if (!strcmp("http.sslkey", var))
 150                return git_config_string(&ssl_key, var, value);
 151#endif
 152#if LIBCURL_VERSION_NUM >= 0x070908
 153        if (!strcmp("http.sslcapath", var))
 154                return git_config_string(&ssl_capath, var, value);
 155#endif
 156        if (!strcmp("http.sslcainfo", var))
 157                return git_config_string(&ssl_cainfo, var, value);
 158        if (!strcmp("http.sslcertpasswordprotected", var)) {
 159                if (git_config_bool(var, value))
 160                        ssl_cert_password_required = 1;
 161                return 0;
 162        }
 163        if (!strcmp("http.minsessions", var)) {
 164                min_curl_sessions = git_config_int(var, value);
 165#ifndef USE_CURL_MULTI
 166                if (min_curl_sessions > 1)
 167                        min_curl_sessions = 1;
 168#endif
 169                return 0;
 170        }
 171#ifdef USE_CURL_MULTI
 172        if (!strcmp("http.maxrequests", var)) {
 173                max_requests = git_config_int(var, value);
 174                return 0;
 175        }
 176#endif
 177        if (!strcmp("http.lowspeedlimit", var)) {
 178                curl_low_speed_limit = (long)git_config_int(var, value);
 179                return 0;
 180        }
 181        if (!strcmp("http.lowspeedtime", var)) {
 182                curl_low_speed_time = (long)git_config_int(var, value);
 183                return 0;
 184        }
 185
 186        if (!strcmp("http.noepsv", var)) {
 187                curl_ftp_no_epsv = git_config_bool(var, value);
 188                return 0;
 189        }
 190        if (!strcmp("http.proxy", var))
 191                return git_config_string(&curl_http_proxy, var, value);
 192
 193        if (!strcmp("http.postbuffer", var)) {
 194                http_post_buffer = git_config_int(var, value);
 195                if (http_post_buffer < LARGE_PACKET_MAX)
 196                        http_post_buffer = LARGE_PACKET_MAX;
 197                return 0;
 198        }
 199
 200        if (!strcmp("http.useragent", var))
 201                return git_config_string(&user_agent, var, value);
 202
 203        /* Fall back on the default ones */
 204        return git_default_config(var, value, cb);
 205}
 206
 207static void init_curl_http_auth(CURL *result)
 208{
 209        if (user_name) {
 210                struct strbuf up = STRBUF_INIT;
 211                if (!user_pass)
 212                        user_pass = xstrdup(git_getpass("Password: "));
 213                strbuf_addf(&up, "%s:%s", user_name, user_pass);
 214                curl_easy_setopt(result, CURLOPT_USERPWD,
 215                                 strbuf_detach(&up, NULL));
 216        }
 217}
 218
 219static int has_cert_password(void)
 220{
 221        if (ssl_cert_password != NULL)
 222                return 1;
 223        if (ssl_cert == NULL || ssl_cert_password_required != 1)
 224                return 0;
 225        /* Only prompt the user once. */
 226        ssl_cert_password_required = -1;
 227        ssl_cert_password = git_getpass("Certificate Password: ");
 228        if (ssl_cert_password != NULL) {
 229                ssl_cert_password = xstrdup(ssl_cert_password);
 230                return 1;
 231        } else
 232                return 0;
 233}
 234
 235static CURL *get_curl_handle(void)
 236{
 237        CURL *result = curl_easy_init();
 238
 239        if (!curl_ssl_verify) {
 240                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 241                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 242        } else {
 243                /* Verify authenticity of the peer's certificate */
 244                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 245                /* The name in the cert must match whom we tried to connect */
 246                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 247        }
 248
 249#if LIBCURL_VERSION_NUM >= 0x070907
 250        curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 251#endif
 252#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 253        curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 254#endif
 255
 256        init_curl_http_auth(result);
 257
 258        if (ssl_cert != NULL)
 259                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 260        if (has_cert_password())
 261                curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 262#if LIBCURL_VERSION_NUM >= 0x070903
 263        if (ssl_key != NULL)
 264                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 265#endif
 266#if LIBCURL_VERSION_NUM >= 0x070908
 267        if (ssl_capath != NULL)
 268                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 269#endif
 270        if (ssl_cainfo != NULL)
 271                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 272        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 273
 274        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 275                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 276                                 curl_low_speed_limit);
 277                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 278                                 curl_low_speed_time);
 279        }
 280
 281        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 282#if LIBCURL_VERSION_NUM >= 0x071301
 283        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 284#elif LIBCURL_VERSION_NUM >= 0x071101
 285        curl_easy_setopt(result, CURLOPT_POST301, 1);
 286#endif
 287
 288        if (getenv("GIT_CURL_VERBOSE"))
 289                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 290
 291        curl_easy_setopt(result, CURLOPT_USERAGENT,
 292                user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 293
 294        if (curl_ftp_no_epsv)
 295                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 296
 297        if (curl_http_proxy)
 298                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 299
 300        return result;
 301}
 302
 303static void http_auth_init(const char *url)
 304{
 305        char *at, *colon, *cp, *slash;
 306        int len;
 307
 308        cp = strstr(url, "://");
 309        if (!cp)
 310                return;
 311
 312        /*
 313         * Ok, the URL looks like "proto://something".  Which one?
 314         * "proto://<user>:<pass>@<host>/...",
 315         * "proto://<user>@<host>/...", or just
 316         * "proto://<host>/..."?
 317         */
 318        cp += 3;
 319        at = strchr(cp, '@');
 320        colon = strchr(cp, ':');
 321        slash = strchrnul(cp, '/');
 322        if (!at || slash <= at)
 323                return; /* No credentials */
 324        if (!colon || at <= colon) {
 325                /* Only username */
 326                len = at - cp;
 327                user_name = xmalloc(len + 1);
 328                memcpy(user_name, cp, len);
 329                user_name[len] = '\0';
 330                user_pass = NULL;
 331        } else {
 332                len = colon - cp;
 333                user_name = xmalloc(len + 1);
 334                memcpy(user_name, cp, len);
 335                user_name[len] = '\0';
 336                len = at - (colon + 1);
 337                user_pass = xmalloc(len + 1);
 338                memcpy(user_pass, colon + 1, len);
 339                user_pass[len] = '\0';
 340        }
 341}
 342
 343static void set_from_env(const char **var, const char *envname)
 344{
 345        const char *val = getenv(envname);
 346        if (val)
 347                *var = val;
 348}
 349
 350void http_init(struct remote *remote)
 351{
 352        char *low_speed_limit;
 353        char *low_speed_time;
 354
 355        http_is_verbose = 0;
 356
 357        git_config(http_options, NULL);
 358
 359        curl_global_init(CURL_GLOBAL_ALL);
 360
 361        if (remote && remote->http_proxy)
 362                curl_http_proxy = xstrdup(remote->http_proxy);
 363
 364        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 365        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 366
 367#ifdef USE_CURL_MULTI
 368        {
 369                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 370                if (http_max_requests != NULL)
 371                        max_requests = atoi(http_max_requests);
 372        }
 373
 374        curlm = curl_multi_init();
 375        if (curlm == NULL) {
 376                fprintf(stderr, "Error creating curl multi handle.\n");
 377                exit(1);
 378        }
 379#endif
 380
 381        if (getenv("GIT_SSL_NO_VERIFY"))
 382                curl_ssl_verify = 0;
 383
 384        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 385#if LIBCURL_VERSION_NUM >= 0x070903
 386        set_from_env(&ssl_key, "GIT_SSL_KEY");
 387#endif
 388#if LIBCURL_VERSION_NUM >= 0x070908
 389        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 390#endif
 391        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 392
 393        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 394
 395        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 396        if (low_speed_limit != NULL)
 397                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 398        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 399        if (low_speed_time != NULL)
 400                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 401
 402        if (curl_ssl_verify == -1)
 403                curl_ssl_verify = 1;
 404
 405        curl_session_count = 0;
 406#ifdef USE_CURL_MULTI
 407        if (max_requests < 1)
 408                max_requests = DEFAULT_MAX_REQUESTS;
 409#endif
 410
 411        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 412                curl_ftp_no_epsv = 1;
 413
 414        if (remote && remote->url && remote->url[0]) {
 415                http_auth_init(remote->url[0]);
 416                if (!ssl_cert_password_required &&
 417                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 418                    !prefixcmp(remote->url[0], "https://"))
 419                        ssl_cert_password_required = 1;
 420        }
 421
 422#ifndef NO_CURL_EASY_DUPHANDLE
 423        curl_default = get_curl_handle();
 424#endif
 425}
 426
 427void http_cleanup(void)
 428{
 429        struct active_request_slot *slot = active_queue_head;
 430
 431        while (slot != NULL) {
 432                struct active_request_slot *next = slot->next;
 433                if (slot->curl != NULL) {
 434#ifdef USE_CURL_MULTI
 435                        curl_multi_remove_handle(curlm, slot->curl);
 436#endif
 437                        curl_easy_cleanup(slot->curl);
 438                }
 439                free(slot);
 440                slot = next;
 441        }
 442        active_queue_head = NULL;
 443
 444#ifndef NO_CURL_EASY_DUPHANDLE
 445        curl_easy_cleanup(curl_default);
 446#endif
 447
 448#ifdef USE_CURL_MULTI
 449        curl_multi_cleanup(curlm);
 450#endif
 451        curl_global_cleanup();
 452
 453        curl_slist_free_all(pragma_header);
 454        pragma_header = NULL;
 455
 456        curl_slist_free_all(no_pragma_header);
 457        no_pragma_header = NULL;
 458
 459        if (curl_http_proxy) {
 460                free((void *)curl_http_proxy);
 461                curl_http_proxy = NULL;
 462        }
 463
 464        if (ssl_cert_password != NULL) {
 465                memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 466                free(ssl_cert_password);
 467                ssl_cert_password = NULL;
 468        }
 469        ssl_cert_password_required = 0;
 470}
 471
 472struct active_request_slot *get_active_slot(void)
 473{
 474        struct active_request_slot *slot = active_queue_head;
 475        struct active_request_slot *newslot;
 476
 477#ifdef USE_CURL_MULTI
 478        int num_transfers;
 479
 480        /* Wait for a slot to open up if the queue is full */
 481        while (active_requests >= max_requests) {
 482                curl_multi_perform(curlm, &num_transfers);
 483                if (num_transfers < active_requests)
 484                        process_curl_messages();
 485        }
 486#endif
 487
 488        while (slot != NULL && slot->in_use)
 489                slot = slot->next;
 490
 491        if (slot == NULL) {
 492                newslot = xmalloc(sizeof(*newslot));
 493                newslot->curl = NULL;
 494                newslot->in_use = 0;
 495                newslot->next = NULL;
 496
 497                slot = active_queue_head;
 498                if (slot == NULL) {
 499                        active_queue_head = newslot;
 500                } else {
 501                        while (slot->next != NULL)
 502                                slot = slot->next;
 503                        slot->next = newslot;
 504                }
 505                slot = newslot;
 506        }
 507
 508        if (slot->curl == NULL) {
 509#ifdef NO_CURL_EASY_DUPHANDLE
 510                slot->curl = get_curl_handle();
 511#else
 512                slot->curl = curl_easy_duphandle(curl_default);
 513#endif
 514                curl_session_count++;
 515        }
 516
 517        active_requests++;
 518        slot->in_use = 1;
 519        slot->local = NULL;
 520        slot->results = NULL;
 521        slot->finished = NULL;
 522        slot->callback_data = NULL;
 523        slot->callback_func = NULL;
 524        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 525        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 526        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 527        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 528        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 529        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 530        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 531
 532        return slot;
 533}
 534
 535int start_active_slot(struct active_request_slot *slot)
 536{
 537#ifdef USE_CURL_MULTI
 538        CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 539        int num_transfers;
 540
 541        if (curlm_result != CURLM_OK &&
 542            curlm_result != CURLM_CALL_MULTI_PERFORM) {
 543                active_requests--;
 544                slot->in_use = 0;
 545                return 0;
 546        }
 547
 548        /*
 549         * We know there must be something to do, since we just added
 550         * something.
 551         */
 552        curl_multi_perform(curlm, &num_transfers);
 553#endif
 554        return 1;
 555}
 556
 557#ifdef USE_CURL_MULTI
 558struct fill_chain {
 559        void *data;
 560        int (*fill)(void *);
 561        struct fill_chain *next;
 562};
 563
 564static struct fill_chain *fill_cfg;
 565
 566void add_fill_function(void *data, int (*fill)(void *))
 567{
 568        struct fill_chain *new = xmalloc(sizeof(*new));
 569        struct fill_chain **linkp = &fill_cfg;
 570        new->data = data;
 571        new->fill = fill;
 572        new->next = NULL;
 573        while (*linkp)
 574                linkp = &(*linkp)->next;
 575        *linkp = new;
 576}
 577
 578void fill_active_slots(void)
 579{
 580        struct active_request_slot *slot = active_queue_head;
 581
 582        while (active_requests < max_requests) {
 583                struct fill_chain *fill;
 584                for (fill = fill_cfg; fill; fill = fill->next)
 585                        if (fill->fill(fill->data))
 586                                break;
 587
 588                if (!fill)
 589                        break;
 590        }
 591
 592        while (slot != NULL) {
 593                if (!slot->in_use && slot->curl != NULL
 594                        && curl_session_count > min_curl_sessions) {
 595                        curl_easy_cleanup(slot->curl);
 596                        slot->curl = NULL;
 597                        curl_session_count--;
 598                }
 599                slot = slot->next;
 600        }
 601}
 602
 603void step_active_slots(void)
 604{
 605        int num_transfers;
 606        CURLMcode curlm_result;
 607
 608        do {
 609                curlm_result = curl_multi_perform(curlm, &num_transfers);
 610        } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 611        if (num_transfers < active_requests) {
 612                process_curl_messages();
 613                fill_active_slots();
 614        }
 615}
 616#endif
 617
 618void run_active_slot(struct active_request_slot *slot)
 619{
 620#ifdef USE_CURL_MULTI
 621        long last_pos = 0;
 622        long current_pos;
 623        fd_set readfds;
 624        fd_set writefds;
 625        fd_set excfds;
 626        int max_fd;
 627        struct timeval select_timeout;
 628        int finished = 0;
 629
 630        slot->finished = &finished;
 631        while (!finished) {
 632                data_received = 0;
 633                step_active_slots();
 634
 635                if (!data_received && slot->local != NULL) {
 636                        current_pos = ftell(slot->local);
 637                        if (current_pos > last_pos)
 638                                data_received++;
 639                        last_pos = current_pos;
 640                }
 641
 642                if (slot->in_use && !data_received) {
 643                        max_fd = 0;
 644                        FD_ZERO(&readfds);
 645                        FD_ZERO(&writefds);
 646                        FD_ZERO(&excfds);
 647                        select_timeout.tv_sec = 0;
 648                        select_timeout.tv_usec = 50000;
 649                        select(max_fd, &readfds, &writefds,
 650                               &excfds, &select_timeout);
 651                }
 652        }
 653#else
 654        while (slot->in_use) {
 655                slot->curl_result = curl_easy_perform(slot->curl);
 656                finish_active_slot(slot);
 657        }
 658#endif
 659}
 660
 661static void closedown_active_slot(struct active_request_slot *slot)
 662{
 663        active_requests--;
 664        slot->in_use = 0;
 665}
 666
 667static void release_active_slot(struct active_request_slot *slot)
 668{
 669        closedown_active_slot(slot);
 670        if (slot->curl && curl_session_count > min_curl_sessions) {
 671#ifdef USE_CURL_MULTI
 672                curl_multi_remove_handle(curlm, slot->curl);
 673#endif
 674                curl_easy_cleanup(slot->curl);
 675                slot->curl = NULL;
 676                curl_session_count--;
 677        }
 678#ifdef USE_CURL_MULTI
 679        fill_active_slots();
 680#endif
 681}
 682
 683void finish_active_slot(struct active_request_slot *slot)
 684{
 685        closedown_active_slot(slot);
 686        curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 687
 688        if (slot->finished != NULL)
 689                (*slot->finished) = 1;
 690
 691        /* Store slot results so they can be read after the slot is reused */
 692        if (slot->results != NULL) {
 693                slot->results->curl_result = slot->curl_result;
 694                slot->results->http_code = slot->http_code;
 695        }
 696
 697        /* Run callback if appropriate */
 698        if (slot->callback_func != NULL)
 699                slot->callback_func(slot->callback_data);
 700}
 701
 702void finish_all_active_slots(void)
 703{
 704        struct active_request_slot *slot = active_queue_head;
 705
 706        while (slot != NULL)
 707                if (slot->in_use) {
 708                        run_active_slot(slot);
 709                        slot = active_queue_head;
 710                } else {
 711                        slot = slot->next;
 712                }
 713}
 714
 715/* Helpers for modifying and creating URLs */
 716static inline int needs_quote(int ch)
 717{
 718        if (((ch >= 'A') && (ch <= 'Z'))
 719                        || ((ch >= 'a') && (ch <= 'z'))
 720                        || ((ch >= '0') && (ch <= '9'))
 721                        || (ch == '/')
 722                        || (ch == '-')
 723                        || (ch == '.'))
 724                return 0;
 725        return 1;
 726}
 727
 728static inline int hex(int v)
 729{
 730        if (v < 10)
 731                return '0' + v;
 732        else
 733                return 'A' + v - 10;
 734}
 735
 736void end_url_with_slash(struct strbuf *buf, const char *url)
 737{
 738        strbuf_addstr(buf, url);
 739        if (buf->len && buf->buf[buf->len - 1] != '/')
 740                strbuf_addstr(buf, "/");
 741}
 742
 743static char *quote_ref_url(const char *base, const char *ref)
 744{
 745        struct strbuf buf = STRBUF_INIT;
 746        const char *cp;
 747        int ch;
 748
 749        end_url_with_slash(&buf, base);
 750
 751        for (cp = ref; (ch = *cp) != 0; cp++)
 752                if (needs_quote(ch))
 753                        strbuf_addf(&buf, "%%%02x", ch);
 754                else
 755                        strbuf_addch(&buf, *cp);
 756
 757        return strbuf_detach(&buf, NULL);
 758}
 759
 760void append_remote_object_url(struct strbuf *buf, const char *url,
 761                              const char *hex,
 762                              int only_two_digit_prefix)
 763{
 764        end_url_with_slash(buf, url);
 765
 766        strbuf_addf(buf, "objects/%.*s/", 2, hex);
 767        if (!only_two_digit_prefix)
 768                strbuf_addf(buf, "%s", hex+2);
 769}
 770
 771char *get_remote_object_url(const char *url, const char *hex,
 772                            int only_two_digit_prefix)
 773{
 774        struct strbuf buf = STRBUF_INIT;
 775        append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 776        return strbuf_detach(&buf, NULL);
 777}
 778
 779/* http_request() targets */
 780#define HTTP_REQUEST_STRBUF     0
 781#define HTTP_REQUEST_FILE       1
 782
 783static int http_request(const char *url, void *result, int target, int options)
 784{
 785        struct active_request_slot *slot;
 786        struct slot_results results;
 787        struct curl_slist *headers = NULL;
 788        struct strbuf buf = STRBUF_INIT;
 789        int ret;
 790
 791        slot = get_active_slot();
 792        slot->results = &results;
 793        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 794
 795        if (result == NULL) {
 796                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 797        } else {
 798                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 799                curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 800
 801                if (target == HTTP_REQUEST_FILE) {
 802                        long posn = ftell(result);
 803                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 804                                         fwrite);
 805                        if (posn > 0) {
 806                                strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 807                                headers = curl_slist_append(headers, buf.buf);
 808                                strbuf_reset(&buf);
 809                        }
 810                        slot->local = result;
 811                } else
 812                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 813                                         fwrite_buffer);
 814        }
 815
 816        strbuf_addstr(&buf, "Pragma:");
 817        if (options & HTTP_NO_CACHE)
 818                strbuf_addstr(&buf, " no-cache");
 819
 820        headers = curl_slist_append(headers, buf.buf);
 821
 822        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 823        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 824
 825        if (start_active_slot(slot)) {
 826                run_active_slot(slot);
 827                if (results.curl_result == CURLE_OK)
 828                        ret = HTTP_OK;
 829                else if (missing_target(&results))
 830                        ret = HTTP_MISSING_TARGET;
 831                else if (results.http_code == 401) {
 832                        if (user_name) {
 833                                ret = HTTP_NOAUTH;
 834                        } else {
 835                                /*
 836                                 * git_getpass is needed here because its very likely stdin/stdout are
 837                                 * pipes to our parent process.  So we instead need to use /dev/tty,
 838                                 * but that is non-portable.  Using git_getpass() can at least be stubbed
 839                                 * on other platforms with a different implementation if/when necessary.
 840                                 */
 841                                user_name = xstrdup(git_getpass("Username: "));
 842                                init_curl_http_auth(slot->curl);
 843                                ret = HTTP_REAUTH;
 844                        }
 845                } else
 846                        ret = HTTP_ERROR;
 847        } else {
 848                error("Unable to start HTTP request for %s", url);
 849                ret = HTTP_START_FAILED;
 850        }
 851
 852        slot->local = NULL;
 853        curl_slist_free_all(headers);
 854        strbuf_release(&buf);
 855
 856        return ret;
 857}
 858
 859int http_get_strbuf(const char *url, struct strbuf *result, int options)
 860{
 861        int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 862        if (http_ret == HTTP_REAUTH) {
 863                http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 864        }
 865        return http_ret;
 866}
 867
 868/*
 869 * Downloads an url and stores the result in the given file.
 870 *
 871 * If a previous interrupted download is detected (i.e. a previous temporary
 872 * file is still around) the download is resumed.
 873 */
 874static int http_get_file(const char *url, const char *filename, int options)
 875{
 876        int ret;
 877        struct strbuf tmpfile = STRBUF_INIT;
 878        FILE *result;
 879
 880        strbuf_addf(&tmpfile, "%s.temp", filename);
 881        result = fopen(tmpfile.buf, "a");
 882        if (! result) {
 883                error("Unable to open local file %s", tmpfile.buf);
 884                ret = HTTP_ERROR;
 885                goto cleanup;
 886        }
 887
 888        ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 889        fclose(result);
 890
 891        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 892                ret = HTTP_ERROR;
 893cleanup:
 894        strbuf_release(&tmpfile);
 895        return ret;
 896}
 897
 898int http_error(const char *url, int ret)
 899{
 900        /* http_request has already handled HTTP_START_FAILED. */
 901        if (ret != HTTP_START_FAILED)
 902                error("%s while accessing %s\n", curl_errorstr, url);
 903
 904        return ret;
 905}
 906
 907int http_fetch_ref(const char *base, struct ref *ref)
 908{
 909        char *url;
 910        struct strbuf buffer = STRBUF_INIT;
 911        int ret = -1;
 912
 913        url = quote_ref_url(base, ref->name);
 914        if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 915                strbuf_rtrim(&buffer);
 916                if (buffer.len == 40)
 917                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 918                else if (!prefixcmp(buffer.buf, "ref: ")) {
 919                        ref->symref = xstrdup(buffer.buf + 5);
 920                        ret = 0;
 921                }
 922        }
 923
 924        strbuf_release(&buffer);
 925        free(url);
 926        return ret;
 927}
 928
 929/* Helpers for fetching packs */
 930static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 931{
 932        char *url, *tmp;
 933        struct strbuf buf = STRBUF_INIT;
 934
 935        if (http_is_verbose)
 936                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 937
 938        end_url_with_slash(&buf, base_url);
 939        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 940        url = strbuf_detach(&buf, NULL);
 941
 942        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 943        tmp = strbuf_detach(&buf, NULL);
 944
 945        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 946                error("Unable to get pack index %s\n", url);
 947                free(tmp);
 948                tmp = NULL;
 949        }
 950
 951        free(url);
 952        return tmp;
 953}
 954
 955static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 956        unsigned char *sha1, const char *base_url)
 957{
 958        struct packed_git *new_pack;
 959        char *tmp_idx = NULL;
 960        int ret;
 961
 962        if (has_pack_index(sha1)) {
 963                new_pack = parse_pack_index(sha1, NULL);
 964                if (!new_pack)
 965                        return -1; /* parse_pack_index() already issued error message */
 966                goto add_pack;
 967        }
 968
 969        tmp_idx = fetch_pack_index(sha1, base_url);
 970        if (!tmp_idx)
 971                return -1;
 972
 973        new_pack = parse_pack_index(sha1, tmp_idx);
 974        if (!new_pack) {
 975                unlink(tmp_idx);
 976                free(tmp_idx);
 977
 978                return -1; /* parse_pack_index() already issued error message */
 979        }
 980
 981        ret = verify_pack_index(new_pack);
 982        if (!ret) {
 983                close_pack_index(new_pack);
 984                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
 985        }
 986        free(tmp_idx);
 987        if (ret)
 988                return -1;
 989
 990add_pack:
 991        new_pack->next = *packs_head;
 992        *packs_head = new_pack;
 993        return 0;
 994}
 995
 996int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
 997{
 998        int ret = 0, i = 0;
 999        char *url, *data;
1000        struct strbuf buf = STRBUF_INIT;
1001        unsigned char sha1[20];
1002
1003        end_url_with_slash(&buf, base_url);
1004        strbuf_addstr(&buf, "objects/info/packs");
1005        url = strbuf_detach(&buf, NULL);
1006
1007        ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1008        if (ret != HTTP_OK)
1009                goto cleanup;
1010
1011        data = buf.buf;
1012        while (i < buf.len) {
1013                switch (data[i]) {
1014                case 'P':
1015                        i++;
1016                        if (i + 52 <= buf.len &&
1017                            !prefixcmp(data + i, " pack-") &&
1018                            !prefixcmp(data + i + 46, ".pack\n")) {
1019                                get_sha1_hex(data + i + 6, sha1);
1020                                fetch_and_setup_pack_index(packs_head, sha1,
1021                                                      base_url);
1022                                i += 51;
1023                                break;
1024                        }
1025                default:
1026                        while (i < buf.len && data[i] != '\n')
1027                                i++;
1028                }
1029                i++;
1030        }
1031
1032cleanup:
1033        free(url);
1034        return ret;
1035}
1036
1037void release_http_pack_request(struct http_pack_request *preq)
1038{
1039        if (preq->packfile != NULL) {
1040                fclose(preq->packfile);
1041                preq->packfile = NULL;
1042                preq->slot->local = NULL;
1043        }
1044        if (preq->range_header != NULL) {
1045                curl_slist_free_all(preq->range_header);
1046                preq->range_header = NULL;
1047        }
1048        preq->slot = NULL;
1049        free(preq->url);
1050}
1051
1052int finish_http_pack_request(struct http_pack_request *preq)
1053{
1054        struct packed_git **lst;
1055        struct packed_git *p = preq->target;
1056        char *tmp_idx;
1057        struct child_process ip;
1058        const char *ip_argv[8];
1059
1060        close_pack_index(p);
1061
1062        fclose(preq->packfile);
1063        preq->packfile = NULL;
1064        preq->slot->local = NULL;
1065
1066        lst = preq->lst;
1067        while (*lst != p)
1068                lst = &((*lst)->next);
1069        *lst = (*lst)->next;
1070
1071        tmp_idx = xstrdup(preq->tmpfile);
1072        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1073               ".idx.temp");
1074
1075        ip_argv[0] = "index-pack";
1076        ip_argv[1] = "-o";
1077        ip_argv[2] = tmp_idx;
1078        ip_argv[3] = preq->tmpfile;
1079        ip_argv[4] = NULL;
1080
1081        memset(&ip, 0, sizeof(ip));
1082        ip.argv = ip_argv;
1083        ip.git_cmd = 1;
1084        ip.no_stdin = 1;
1085        ip.no_stdout = 1;
1086
1087        if (run_command(&ip)) {
1088                unlink(preq->tmpfile);
1089                unlink(tmp_idx);
1090                free(tmp_idx);
1091                return -1;
1092        }
1093
1094        unlink(sha1_pack_index_name(p->sha1));
1095
1096        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1097         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1098                free(tmp_idx);
1099                return -1;
1100        }
1101
1102        install_packed_git(p);
1103        free(tmp_idx);
1104        return 0;
1105}
1106
1107struct http_pack_request *new_http_pack_request(
1108        struct packed_git *target, const char *base_url)
1109{
1110        long prev_posn = 0;
1111        char range[RANGE_HEADER_SIZE];
1112        struct strbuf buf = STRBUF_INIT;
1113        struct http_pack_request *preq;
1114
1115        preq = xmalloc(sizeof(*preq));
1116        preq->target = target;
1117        preq->range_header = NULL;
1118
1119        end_url_with_slash(&buf, base_url);
1120        strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1121                sha1_to_hex(target->sha1));
1122        preq->url = strbuf_detach(&buf, NULL);
1123
1124        snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1125                sha1_pack_name(target->sha1));
1126        preq->packfile = fopen(preq->tmpfile, "a");
1127        if (!preq->packfile) {
1128                error("Unable to open local file %s for pack",
1129                      preq->tmpfile);
1130                goto abort;
1131        }
1132
1133        preq->slot = get_active_slot();
1134        preq->slot->local = preq->packfile;
1135        curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1136        curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1137        curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1138        curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1139                no_pragma_header);
1140
1141        /*
1142         * If there is data present from a previous transfer attempt,
1143         * resume where it left off
1144         */
1145        prev_posn = ftell(preq->packfile);
1146        if (prev_posn>0) {
1147                if (http_is_verbose)
1148                        fprintf(stderr,
1149                                "Resuming fetch of pack %s at byte %ld\n",
1150                                sha1_to_hex(target->sha1), prev_posn);
1151                sprintf(range, "Range: bytes=%ld-", prev_posn);
1152                preq->range_header = curl_slist_append(NULL, range);
1153                curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1154                        preq->range_header);
1155        }
1156
1157        return preq;
1158
1159abort:
1160        free(preq->url);
1161        free(preq);
1162        return NULL;
1163}
1164
1165/* Helpers for fetching objects (loose) */
1166static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
1167                               void *data)
1168{
1169        unsigned char expn[4096];
1170        size_t size = eltsize * nmemb;
1171        int posn = 0;
1172        struct http_object_request *freq =
1173                (struct http_object_request *)data;
1174        do {
1175                ssize_t retval = xwrite(freq->localfile,
1176                                        (char *) ptr + posn, size - posn);
1177                if (retval < 0)
1178                        return posn;
1179                posn += retval;
1180        } while (posn < size);
1181
1182        freq->stream.avail_in = size;
1183        freq->stream.next_in = ptr;
1184        do {
1185                freq->stream.next_out = expn;
1186                freq->stream.avail_out = sizeof(expn);
1187                freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1188                git_SHA1_Update(&freq->c, expn,
1189                                sizeof(expn) - freq->stream.avail_out);
1190        } while (freq->stream.avail_in && freq->zret == Z_OK);
1191        data_received++;
1192        return size;
1193}
1194
1195struct http_object_request *new_http_object_request(const char *base_url,
1196        unsigned char *sha1)
1197{
1198        char *hex = sha1_to_hex(sha1);
1199        char *filename;
1200        char prevfile[PATH_MAX];
1201        int prevlocal;
1202        unsigned char prev_buf[PREV_BUF_SIZE];
1203        ssize_t prev_read = 0;
1204        long prev_posn = 0;
1205        char range[RANGE_HEADER_SIZE];
1206        struct curl_slist *range_header = NULL;
1207        struct http_object_request *freq;
1208
1209        freq = xmalloc(sizeof(*freq));
1210        hashcpy(freq->sha1, sha1);
1211        freq->localfile = -1;
1212
1213        filename = sha1_file_name(sha1);
1214        snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1215                 "%s.temp", filename);
1216
1217        snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1218        unlink_or_warn(prevfile);
1219        rename(freq->tmpfile, prevfile);
1220        unlink_or_warn(freq->tmpfile);
1221
1222        if (freq->localfile != -1)
1223                error("fd leakage in start: %d", freq->localfile);
1224        freq->localfile = open(freq->tmpfile,
1225                               O_WRONLY | O_CREAT | O_EXCL, 0666);
1226        /*
1227         * This could have failed due to the "lazy directory creation";
1228         * try to mkdir the last path component.
1229         */
1230        if (freq->localfile < 0 && errno == ENOENT) {
1231                char *dir = strrchr(freq->tmpfile, '/');
1232                if (dir) {
1233                        *dir = 0;
1234                        mkdir(freq->tmpfile, 0777);
1235                        *dir = '/';
1236                }
1237                freq->localfile = open(freq->tmpfile,
1238                                       O_WRONLY | O_CREAT | O_EXCL, 0666);
1239        }
1240
1241        if (freq->localfile < 0) {
1242                error("Couldn't create temporary file %s: %s",
1243                      freq->tmpfile, strerror(errno));
1244                goto abort;
1245        }
1246
1247        memset(&freq->stream, 0, sizeof(freq->stream));
1248
1249        git_inflate_init(&freq->stream);
1250
1251        git_SHA1_Init(&freq->c);
1252
1253        freq->url = get_remote_object_url(base_url, hex, 0);
1254
1255        /*
1256         * If a previous temp file is present, process what was already
1257         * fetched.
1258         */
1259        prevlocal = open(prevfile, O_RDONLY);
1260        if (prevlocal != -1) {
1261                do {
1262                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1263                        if (prev_read>0) {
1264                                if (fwrite_sha1_file(prev_buf,
1265                                                     1,
1266                                                     prev_read,
1267                                                     freq) == prev_read) {
1268                                        prev_posn += prev_read;
1269                                } else {
1270                                        prev_read = -1;
1271                                }
1272                        }
1273                } while (prev_read > 0);
1274                close(prevlocal);
1275        }
1276        unlink_or_warn(prevfile);
1277
1278        /*
1279         * Reset inflate/SHA1 if there was an error reading the previous temp
1280         * file; also rewind to the beginning of the local file.
1281         */
1282        if (prev_read == -1) {
1283                memset(&freq->stream, 0, sizeof(freq->stream));
1284                git_inflate_init(&freq->stream);
1285                git_SHA1_Init(&freq->c);
1286                if (prev_posn>0) {
1287                        prev_posn = 0;
1288                        lseek(freq->localfile, 0, SEEK_SET);
1289                        if (ftruncate(freq->localfile, 0) < 0) {
1290                                error("Couldn't truncate temporary file %s: %s",
1291                                          freq->tmpfile, strerror(errno));
1292                                goto abort;
1293                        }
1294                }
1295        }
1296
1297        freq->slot = get_active_slot();
1298
1299        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1300        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1301        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1302        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1303        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1304
1305        /*
1306         * If we have successfully processed data from a previous fetch
1307         * attempt, only fetch the data we don't already have.
1308         */
1309        if (prev_posn>0) {
1310                if (http_is_verbose)
1311                        fprintf(stderr,
1312                                "Resuming fetch of object %s at byte %ld\n",
1313                                hex, prev_posn);
1314                sprintf(range, "Range: bytes=%ld-", prev_posn);
1315                range_header = curl_slist_append(range_header, range);
1316                curl_easy_setopt(freq->slot->curl,
1317                                 CURLOPT_HTTPHEADER, range_header);
1318        }
1319
1320        return freq;
1321
1322abort:
1323        free(filename);
1324        free(freq->url);
1325        free(freq);
1326        return NULL;
1327}
1328
1329void process_http_object_request(struct http_object_request *freq)
1330{
1331        if (freq->slot == NULL)
1332                return;
1333        freq->curl_result = freq->slot->curl_result;
1334        freq->http_code = freq->slot->http_code;
1335        freq->slot = NULL;
1336}
1337
1338int finish_http_object_request(struct http_object_request *freq)
1339{
1340        struct stat st;
1341
1342        close(freq->localfile);
1343        freq->localfile = -1;
1344
1345        process_http_object_request(freq);
1346
1347        if (freq->http_code == 416) {
1348                warning("requested range invalid; we may already have all the data.");
1349        } else if (freq->curl_result != CURLE_OK) {
1350                if (stat(freq->tmpfile, &st) == 0)
1351                        if (st.st_size == 0)
1352                                unlink_or_warn(freq->tmpfile);
1353                return -1;
1354        }
1355
1356        git_inflate_end(&freq->stream);
1357        git_SHA1_Final(freq->real_sha1, &freq->c);
1358        if (freq->zret != Z_STREAM_END) {
1359                unlink_or_warn(freq->tmpfile);
1360                return -1;
1361        }
1362        if (hashcmp(freq->sha1, freq->real_sha1)) {
1363                unlink_or_warn(freq->tmpfile);
1364                return -1;
1365        }
1366        freq->rename =
1367                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1368
1369        return freq->rename;
1370}
1371
1372void abort_http_object_request(struct http_object_request *freq)
1373{
1374        unlink_or_warn(freq->tmpfile);
1375
1376        release_http_object_request(freq);
1377}
1378
1379void release_http_object_request(struct http_object_request *freq)
1380{
1381        if (freq->localfile != -1) {
1382                close(freq->localfile);
1383                freq->localfile = -1;
1384        }
1385        if (freq->url != NULL) {
1386                free(freq->url);
1387                freq->url = NULL;
1388        }
1389        if (freq->slot != NULL) {
1390                freq->slot->callback_func = NULL;
1391                freq->slot->callback_data = NULL;
1392                release_active_slot(freq->slot);
1393                freq->slot = NULL;
1394        }
1395}