Andrew's git / gitweb.git / http.c
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http.con commit Merge branch 'tj/maint-imap-send-remove-unused' into maint (4df989f)
   1#include "http.h"
   2#include "pack.h"
   3#include "sideband.h"
   4#include "run-command.h"
   5#include "url.h"
   6
   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 const char *curl_cookie_file;
  44static char *user_name, *user_pass, *description;
  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        return size;
 102}
 103
 104size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 105{
 106        return eltsize * nmemb;
 107}
 108
 109#ifdef USE_CURL_MULTI
 110static void process_curl_messages(void)
 111{
 112        int num_messages;
 113        struct active_request_slot *slot;
 114        CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 115
 116        while (curl_message != NULL) {
 117                if (curl_message->msg == CURLMSG_DONE) {
 118                        int curl_result = curl_message->data.result;
 119                        slot = active_queue_head;
 120                        while (slot != NULL &&
 121                               slot->curl != curl_message->easy_handle)
 122                                slot = slot->next;
 123                        if (slot != NULL) {
 124                                curl_multi_remove_handle(curlm, slot->curl);
 125                                slot->curl_result = curl_result;
 126                                finish_active_slot(slot);
 127                        } else {
 128                                fprintf(stderr, "Received DONE message for unknown request!\n");
 129                        }
 130                } else {
 131                        fprintf(stderr, "Unknown CURL message received: %d\n",
 132                                (int)curl_message->msg);
 133                }
 134                curl_message = curl_multi_info_read(curlm, &num_messages);
 135        }
 136}
 137#endif
 138
 139static char *git_getpass_with_description(const char *what, const char *desc)
 140{
 141        struct strbuf prompt = STRBUF_INIT;
 142        char *r;
 143
 144        if (desc)
 145                strbuf_addf(&prompt, "%s for '%s': ", what, desc);
 146        else
 147                strbuf_addf(&prompt, "%s: ", what);
 148        /*
 149         * NEEDSWORK: for usernames, we should do something less magical that
 150         * actually echoes the characters. However, we need to read from
 151         * /dev/tty and not stdio, which is not portable (but getpass will do
 152         * it for us). http.c uses the same workaround.
 153         */
 154        r = git_getpass(prompt.buf);
 155
 156        strbuf_release(&prompt);
 157        return xstrdup(r);
 158}
 159
 160static int http_options(const char *var, const char *value, void *cb)
 161{
 162        if (!strcmp("http.sslverify", var)) {
 163                curl_ssl_verify = git_config_bool(var, value);
 164                return 0;
 165        }
 166        if (!strcmp("http.sslcert", var))
 167                return git_config_string(&ssl_cert, var, value);
 168#if LIBCURL_VERSION_NUM >= 0x070903
 169        if (!strcmp("http.sslkey", var))
 170                return git_config_string(&ssl_key, var, value);
 171#endif
 172#if LIBCURL_VERSION_NUM >= 0x070908
 173        if (!strcmp("http.sslcapath", var))
 174                return git_config_string(&ssl_capath, var, value);
 175#endif
 176        if (!strcmp("http.sslcainfo", var))
 177                return git_config_string(&ssl_cainfo, var, value);
 178        if (!strcmp("http.sslcertpasswordprotected", var)) {
 179                if (git_config_bool(var, value))
 180                        ssl_cert_password_required = 1;
 181                return 0;
 182        }
 183        if (!strcmp("http.minsessions", var)) {
 184                min_curl_sessions = git_config_int(var, value);
 185#ifndef USE_CURL_MULTI
 186                if (min_curl_sessions > 1)
 187                        min_curl_sessions = 1;
 188#endif
 189                return 0;
 190        }
 191#ifdef USE_CURL_MULTI
 192        if (!strcmp("http.maxrequests", var)) {
 193                max_requests = git_config_int(var, value);
 194                return 0;
 195        }
 196#endif
 197        if (!strcmp("http.lowspeedlimit", var)) {
 198                curl_low_speed_limit = (long)git_config_int(var, value);
 199                return 0;
 200        }
 201        if (!strcmp("http.lowspeedtime", var)) {
 202                curl_low_speed_time = (long)git_config_int(var, value);
 203                return 0;
 204        }
 205
 206        if (!strcmp("http.noepsv", var)) {
 207                curl_ftp_no_epsv = git_config_bool(var, value);
 208                return 0;
 209        }
 210        if (!strcmp("http.proxy", var))
 211                return git_config_string(&curl_http_proxy, var, value);
 212
 213        if (!strcmp("http.cookiefile", var))
 214                return git_config_string(&curl_cookie_file, var, value);
 215
 216        if (!strcmp("http.postbuffer", var)) {
 217                http_post_buffer = git_config_int(var, value);
 218                if (http_post_buffer < LARGE_PACKET_MAX)
 219                        http_post_buffer = LARGE_PACKET_MAX;
 220                return 0;
 221        }
 222
 223        if (!strcmp("http.useragent", var))
 224                return git_config_string(&user_agent, var, value);
 225
 226        /* Fall back on the default ones */
 227        return git_default_config(var, value, cb);
 228}
 229
 230static void init_curl_http_auth(CURL *result)
 231{
 232        if (user_name) {
 233                struct strbuf up = STRBUF_INIT;
 234                if (!user_pass)
 235                        user_pass = xstrdup(git_getpass_with_description("Password", description));
 236                strbuf_addf(&up, "%s:%s", user_name, user_pass);
 237                curl_easy_setopt(result, CURLOPT_USERPWD,
 238                                 strbuf_detach(&up, NULL));
 239        }
 240}
 241
 242static int has_cert_password(void)
 243{
 244        if (ssl_cert_password != NULL)
 245                return 1;
 246        if (ssl_cert == NULL || ssl_cert_password_required != 1)
 247                return 0;
 248        /* Only prompt the user once. */
 249        ssl_cert_password_required = -1;
 250        ssl_cert_password = git_getpass_with_description("Certificate Password", description);
 251        if (ssl_cert_password != NULL) {
 252                ssl_cert_password = xstrdup(ssl_cert_password);
 253                return 1;
 254        } else
 255                return 0;
 256}
 257
 258static CURL *get_curl_handle(void)
 259{
 260        CURL *result = curl_easy_init();
 261
 262        if (!curl_ssl_verify) {
 263                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 264                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 265        } else {
 266                /* Verify authenticity of the peer's certificate */
 267                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 268                /* The name in the cert must match whom we tried to connect */
 269                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 270        }
 271
 272#if LIBCURL_VERSION_NUM >= 0x070907
 273        curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 274#endif
 275#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 276        curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 277#endif
 278
 279        if (ssl_cert != NULL)
 280                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 281        if (has_cert_password())
 282                curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 283#if LIBCURL_VERSION_NUM >= 0x070903
 284        if (ssl_key != NULL)
 285                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 286#endif
 287#if LIBCURL_VERSION_NUM >= 0x070908
 288        if (ssl_capath != NULL)
 289                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 290#endif
 291        if (ssl_cainfo != NULL)
 292                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 293        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 294
 295        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 296                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 297                                 curl_low_speed_limit);
 298                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 299                                 curl_low_speed_time);
 300        }
 301
 302        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 303#if LIBCURL_VERSION_NUM >= 0x071301
 304        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 305#elif LIBCURL_VERSION_NUM >= 0x071101
 306        curl_easy_setopt(result, CURLOPT_POST301, 1);
 307#endif
 308
 309        if (getenv("GIT_CURL_VERBOSE"))
 310                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 311
 312        curl_easy_setopt(result, CURLOPT_USERAGENT,
 313                user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 314
 315        if (curl_ftp_no_epsv)
 316                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 317
 318        if (curl_http_proxy)
 319                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 320
 321        return result;
 322}
 323
 324static void http_auth_init(const char *url)
 325{
 326        const char *at, *colon, *cp, *slash, *host;
 327
 328        cp = strstr(url, "://");
 329        if (!cp)
 330                return;
 331
 332        /*
 333         * Ok, the URL looks like "proto://something".  Which one?
 334         * "proto://<user>:<pass>@<host>/...",
 335         * "proto://<user>@<host>/...", or just
 336         * "proto://<host>/..."?
 337         */
 338        cp += 3;
 339        at = strchr(cp, '@');
 340        colon = strchr(cp, ':');
 341        slash = strchrnul(cp, '/');
 342        if (!at || slash <= at) {
 343                /* No credentials, but we may have to ask for some later */
 344                host = cp;
 345        }
 346        else if (!colon || at <= colon) {
 347                /* Only username */
 348                user_name = url_decode_mem(cp, at - cp);
 349                user_pass = NULL;
 350                host = at + 1;
 351        } else {
 352                user_name = url_decode_mem(cp, colon - cp);
 353                user_pass = url_decode_mem(colon + 1, at - (colon + 1));
 354                host = at + 1;
 355        }
 356
 357        description = url_decode_mem(host, slash - host);
 358}
 359
 360static void set_from_env(const char **var, const char *envname)
 361{
 362        const char *val = getenv(envname);
 363        if (val)
 364                *var = val;
 365}
 366
 367void http_init(struct remote *remote, const char *url)
 368{
 369        char *low_speed_limit;
 370        char *low_speed_time;
 371
 372        http_is_verbose = 0;
 373
 374        git_config(http_options, NULL);
 375
 376        curl_global_init(CURL_GLOBAL_ALL);
 377
 378        if (remote && remote->http_proxy)
 379                curl_http_proxy = xstrdup(remote->http_proxy);
 380
 381        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 382        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 383
 384#ifdef USE_CURL_MULTI
 385        {
 386                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 387                if (http_max_requests != NULL)
 388                        max_requests = atoi(http_max_requests);
 389        }
 390
 391        curlm = curl_multi_init();
 392        if (curlm == NULL) {
 393                fprintf(stderr, "Error creating curl multi handle.\n");
 394                exit(1);
 395        }
 396#endif
 397
 398        if (getenv("GIT_SSL_NO_VERIFY"))
 399                curl_ssl_verify = 0;
 400
 401        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 402#if LIBCURL_VERSION_NUM >= 0x070903
 403        set_from_env(&ssl_key, "GIT_SSL_KEY");
 404#endif
 405#if LIBCURL_VERSION_NUM >= 0x070908
 406        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 407#endif
 408        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 409
 410        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 411
 412        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 413        if (low_speed_limit != NULL)
 414                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 415        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 416        if (low_speed_time != NULL)
 417                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 418
 419        if (curl_ssl_verify == -1)
 420                curl_ssl_verify = 1;
 421
 422        curl_session_count = 0;
 423#ifdef USE_CURL_MULTI
 424        if (max_requests < 1)
 425                max_requests = DEFAULT_MAX_REQUESTS;
 426#endif
 427
 428        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 429                curl_ftp_no_epsv = 1;
 430
 431        if (url) {
 432                http_auth_init(url);
 433                if (!ssl_cert_password_required &&
 434                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 435                    !prefixcmp(url, "https://"))
 436                        ssl_cert_password_required = 1;
 437        }
 438
 439#ifndef NO_CURL_EASY_DUPHANDLE
 440        curl_default = get_curl_handle();
 441#endif
 442}
 443
 444void http_cleanup(void)
 445{
 446        struct active_request_slot *slot = active_queue_head;
 447
 448        while (slot != NULL) {
 449                struct active_request_slot *next = slot->next;
 450                if (slot->curl != NULL) {
 451#ifdef USE_CURL_MULTI
 452                        curl_multi_remove_handle(curlm, slot->curl);
 453#endif
 454                        curl_easy_cleanup(slot->curl);
 455                }
 456                free(slot);
 457                slot = next;
 458        }
 459        active_queue_head = NULL;
 460
 461#ifndef NO_CURL_EASY_DUPHANDLE
 462        curl_easy_cleanup(curl_default);
 463#endif
 464
 465#ifdef USE_CURL_MULTI
 466        curl_multi_cleanup(curlm);
 467#endif
 468        curl_global_cleanup();
 469
 470        curl_slist_free_all(pragma_header);
 471        pragma_header = NULL;
 472
 473        curl_slist_free_all(no_pragma_header);
 474        no_pragma_header = NULL;
 475
 476        if (curl_http_proxy) {
 477                free((void *)curl_http_proxy);
 478                curl_http_proxy = NULL;
 479        }
 480
 481        if (ssl_cert_password != NULL) {
 482                memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 483                free(ssl_cert_password);
 484                ssl_cert_password = NULL;
 485        }
 486        ssl_cert_password_required = 0;
 487}
 488
 489struct active_request_slot *get_active_slot(void)
 490{
 491        struct active_request_slot *slot = active_queue_head;
 492        struct active_request_slot *newslot;
 493
 494#ifdef USE_CURL_MULTI
 495        int num_transfers;
 496
 497        /* Wait for a slot to open up if the queue is full */
 498        while (active_requests >= max_requests) {
 499                curl_multi_perform(curlm, &num_transfers);
 500                if (num_transfers < active_requests)
 501                        process_curl_messages();
 502        }
 503#endif
 504
 505        while (slot != NULL && slot->in_use)
 506                slot = slot->next;
 507
 508        if (slot == NULL) {
 509                newslot = xmalloc(sizeof(*newslot));
 510                newslot->curl = NULL;
 511                newslot->in_use = 0;
 512                newslot->next = NULL;
 513
 514                slot = active_queue_head;
 515                if (slot == NULL) {
 516                        active_queue_head = newslot;
 517                } else {
 518                        while (slot->next != NULL)
 519                                slot = slot->next;
 520                        slot->next = newslot;
 521                }
 522                slot = newslot;
 523        }
 524
 525        if (slot->curl == NULL) {
 526#ifdef NO_CURL_EASY_DUPHANDLE
 527                slot->curl = get_curl_handle();
 528#else
 529                slot->curl = curl_easy_duphandle(curl_default);
 530#endif
 531                curl_session_count++;
 532        }
 533
 534        active_requests++;
 535        slot->in_use = 1;
 536        slot->results = NULL;
 537        slot->finished = NULL;
 538        slot->callback_data = NULL;
 539        slot->callback_func = NULL;
 540        curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 541        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 542        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 543        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 544        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 545        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 546        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 547        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 548        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 549
 550        return slot;
 551}
 552
 553int start_active_slot(struct active_request_slot *slot)
 554{
 555#ifdef USE_CURL_MULTI
 556        CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 557        int num_transfers;
 558
 559        if (curlm_result != CURLM_OK &&
 560            curlm_result != CURLM_CALL_MULTI_PERFORM) {
 561                active_requests--;
 562                slot->in_use = 0;
 563                return 0;
 564        }
 565
 566        /*
 567         * We know there must be something to do, since we just added
 568         * something.
 569         */
 570        curl_multi_perform(curlm, &num_transfers);
 571#endif
 572        return 1;
 573}
 574
 575#ifdef USE_CURL_MULTI
 576struct fill_chain {
 577        void *data;
 578        int (*fill)(void *);
 579        struct fill_chain *next;
 580};
 581
 582static struct fill_chain *fill_cfg;
 583
 584void add_fill_function(void *data, int (*fill)(void *))
 585{
 586        struct fill_chain *new = xmalloc(sizeof(*new));
 587        struct fill_chain **linkp = &fill_cfg;
 588        new->data = data;
 589        new->fill = fill;
 590        new->next = NULL;
 591        while (*linkp)
 592                linkp = &(*linkp)->next;
 593        *linkp = new;
 594}
 595
 596void fill_active_slots(void)
 597{
 598        struct active_request_slot *slot = active_queue_head;
 599
 600        while (active_requests < max_requests) {
 601                struct fill_chain *fill;
 602                for (fill = fill_cfg; fill; fill = fill->next)
 603                        if (fill->fill(fill->data))
 604                                break;
 605
 606                if (!fill)
 607                        break;
 608        }
 609
 610        while (slot != NULL) {
 611                if (!slot->in_use && slot->curl != NULL
 612                        && curl_session_count > min_curl_sessions) {
 613                        curl_easy_cleanup(slot->curl);
 614                        slot->curl = NULL;
 615                        curl_session_count--;
 616                }
 617                slot = slot->next;
 618        }
 619}
 620
 621void step_active_slots(void)
 622{
 623        int num_transfers;
 624        CURLMcode curlm_result;
 625
 626        do {
 627                curlm_result = curl_multi_perform(curlm, &num_transfers);
 628        } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 629        if (num_transfers < active_requests) {
 630                process_curl_messages();
 631                fill_active_slots();
 632        }
 633}
 634#endif
 635
 636void run_active_slot(struct active_request_slot *slot)
 637{
 638#ifdef USE_CURL_MULTI
 639        fd_set readfds;
 640        fd_set writefds;
 641        fd_set excfds;
 642        int max_fd;
 643        struct timeval select_timeout;
 644        int finished = 0;
 645
 646        slot->finished = &finished;
 647        while (!finished) {
 648                step_active_slots();
 649
 650                if (slot->in_use) {
 651#if LIBCURL_VERSION_NUM >= 0x070f04
 652                        long curl_timeout;
 653                        curl_multi_timeout(curlm, &curl_timeout);
 654                        if (curl_timeout == 0) {
 655                                continue;
 656                        } else if (curl_timeout == -1) {
 657                                select_timeout.tv_sec  = 0;
 658                                select_timeout.tv_usec = 50000;
 659                        } else {
 660                                select_timeout.tv_sec  =  curl_timeout / 1000;
 661                                select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 662                        }
 663#else
 664                        select_timeout.tv_sec  = 0;
 665                        select_timeout.tv_usec = 50000;
 666#endif
 667
 668                        max_fd = -1;
 669                        FD_ZERO(&readfds);
 670                        FD_ZERO(&writefds);
 671                        FD_ZERO(&excfds);
 672                        curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 673
 674                        select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 675                }
 676        }
 677#else
 678        while (slot->in_use) {
 679                slot->curl_result = curl_easy_perform(slot->curl);
 680                finish_active_slot(slot);
 681        }
 682#endif
 683}
 684
 685static void closedown_active_slot(struct active_request_slot *slot)
 686{
 687        active_requests--;
 688        slot->in_use = 0;
 689}
 690
 691static void release_active_slot(struct active_request_slot *slot)
 692{
 693        closedown_active_slot(slot);
 694        if (slot->curl && curl_session_count > min_curl_sessions) {
 695#ifdef USE_CURL_MULTI
 696                curl_multi_remove_handle(curlm, slot->curl);
 697#endif
 698                curl_easy_cleanup(slot->curl);
 699                slot->curl = NULL;
 700                curl_session_count--;
 701        }
 702#ifdef USE_CURL_MULTI
 703        fill_active_slots();
 704#endif
 705}
 706
 707void finish_active_slot(struct active_request_slot *slot)
 708{
 709        closedown_active_slot(slot);
 710        curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 711
 712        if (slot->finished != NULL)
 713                (*slot->finished) = 1;
 714
 715        /* Store slot results so they can be read after the slot is reused */
 716        if (slot->results != NULL) {
 717                slot->results->curl_result = slot->curl_result;
 718                slot->results->http_code = slot->http_code;
 719        }
 720
 721        /* Run callback if appropriate */
 722        if (slot->callback_func != NULL)
 723                slot->callback_func(slot->callback_data);
 724}
 725
 726void finish_all_active_slots(void)
 727{
 728        struct active_request_slot *slot = active_queue_head;
 729
 730        while (slot != NULL)
 731                if (slot->in_use) {
 732                        run_active_slot(slot);
 733                        slot = active_queue_head;
 734                } else {
 735                        slot = slot->next;
 736                }
 737}
 738
 739/* Helpers for modifying and creating URLs */
 740static inline int needs_quote(int ch)
 741{
 742        if (((ch >= 'A') && (ch <= 'Z'))
 743                        || ((ch >= 'a') && (ch <= 'z'))
 744                        || ((ch >= '0') && (ch <= '9'))
 745                        || (ch == '/')
 746                        || (ch == '-')
 747                        || (ch == '.'))
 748                return 0;
 749        return 1;
 750}
 751
 752static char *quote_ref_url(const char *base, const char *ref)
 753{
 754        struct strbuf buf = STRBUF_INIT;
 755        const char *cp;
 756        int ch;
 757
 758        end_url_with_slash(&buf, base);
 759
 760        for (cp = ref; (ch = *cp) != 0; cp++)
 761                if (needs_quote(ch))
 762                        strbuf_addf(&buf, "%%%02x", ch);
 763                else
 764                        strbuf_addch(&buf, *cp);
 765
 766        return strbuf_detach(&buf, NULL);
 767}
 768
 769void append_remote_object_url(struct strbuf *buf, const char *url,
 770                              const char *hex,
 771                              int only_two_digit_prefix)
 772{
 773        end_url_with_slash(buf, url);
 774
 775        strbuf_addf(buf, "objects/%.*s/", 2, hex);
 776        if (!only_two_digit_prefix)
 777                strbuf_addf(buf, "%s", hex+2);
 778}
 779
 780char *get_remote_object_url(const char *url, const char *hex,
 781                            int only_two_digit_prefix)
 782{
 783        struct strbuf buf = STRBUF_INIT;
 784        append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 785        return strbuf_detach(&buf, NULL);
 786}
 787
 788/* http_request() targets */
 789#define HTTP_REQUEST_STRBUF     0
 790#define HTTP_REQUEST_FILE       1
 791
 792static int http_request(const char *url, void *result, int target, int options)
 793{
 794        struct active_request_slot *slot;
 795        struct slot_results results;
 796        struct curl_slist *headers = NULL;
 797        struct strbuf buf = STRBUF_INIT;
 798        int ret;
 799
 800        slot = get_active_slot();
 801        slot->results = &results;
 802        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 803
 804        if (result == NULL) {
 805                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 806        } else {
 807                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 808                curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 809
 810                if (target == HTTP_REQUEST_FILE) {
 811                        long posn = ftell(result);
 812                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 813                                         fwrite);
 814                        if (posn > 0) {
 815                                strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 816                                headers = curl_slist_append(headers, buf.buf);
 817                                strbuf_reset(&buf);
 818                        }
 819                } else
 820                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 821                                         fwrite_buffer);
 822        }
 823
 824        strbuf_addstr(&buf, "Pragma:");
 825        if (options & HTTP_NO_CACHE)
 826                strbuf_addstr(&buf, " no-cache");
 827
 828        headers = curl_slist_append(headers, buf.buf);
 829
 830        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 831        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 832
 833        if (start_active_slot(slot)) {
 834                run_active_slot(slot);
 835                if (results.curl_result == CURLE_OK)
 836                        ret = HTTP_OK;
 837                else if (missing_target(&results))
 838                        ret = HTTP_MISSING_TARGET;
 839                else if (results.http_code == 401) {
 840                        if (user_name && user_pass) {
 841                                ret = HTTP_NOAUTH;
 842                        } else {
 843                                /*
 844                                 * git_getpass is needed here because its very likely stdin/stdout are
 845                                 * pipes to our parent process.  So we instead need to use /dev/tty,
 846                                 * but that is non-portable.  Using git_getpass() can at least be stubbed
 847                                 * on other platforms with a different implementation if/when necessary.
 848                                 */
 849                                if (!user_name)
 850                                        user_name = xstrdup(git_getpass_with_description("Username", description));
 851                                init_curl_http_auth(slot->curl);
 852                                ret = HTTP_REAUTH;
 853                        }
 854                } else {
 855                        if (!curl_errorstr[0])
 856                                strlcpy(curl_errorstr,
 857                                        curl_easy_strerror(results.curl_result),
 858                                        sizeof(curl_errorstr));
 859                        ret = HTTP_ERROR;
 860                }
 861        } else {
 862                error("Unable to start HTTP request for %s", url);
 863                ret = HTTP_START_FAILED;
 864        }
 865
 866        curl_slist_free_all(headers);
 867        strbuf_release(&buf);
 868
 869        return ret;
 870}
 871
 872static int http_request_reauth(const char *url, void *result, int target,
 873                               int options)
 874{
 875        int ret = http_request(url, result, target, options);
 876        if (ret != HTTP_REAUTH)
 877                return ret;
 878        return http_request(url, result, target, options);
 879}
 880
 881int http_get_strbuf(const char *url, struct strbuf *result, int options)
 882{
 883        return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 884}
 885
 886/*
 887 * Downloads an url and stores the result in the given file.
 888 *
 889 * If a previous interrupted download is detected (i.e. a previous temporary
 890 * file is still around) the download is resumed.
 891 */
 892static int http_get_file(const char *url, const char *filename, int options)
 893{
 894        int ret;
 895        struct strbuf tmpfile = STRBUF_INIT;
 896        FILE *result;
 897
 898        strbuf_addf(&tmpfile, "%s.temp", filename);
 899        result = fopen(tmpfile.buf, "a");
 900        if (! result) {
 901                error("Unable to open local file %s", tmpfile.buf);
 902                ret = HTTP_ERROR;
 903                goto cleanup;
 904        }
 905
 906        ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 907        fclose(result);
 908
 909        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 910                ret = HTTP_ERROR;
 911cleanup:
 912        strbuf_release(&tmpfile);
 913        return ret;
 914}
 915
 916int http_error(const char *url, int ret)
 917{
 918        /* http_request has already handled HTTP_START_FAILED. */
 919        if (ret != HTTP_START_FAILED)
 920                error("%s while accessing %s", curl_errorstr, url);
 921
 922        return ret;
 923}
 924
 925int http_fetch_ref(const char *base, struct ref *ref)
 926{
 927        char *url;
 928        struct strbuf buffer = STRBUF_INIT;
 929        int ret = -1;
 930
 931        url = quote_ref_url(base, ref->name);
 932        if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 933                strbuf_rtrim(&buffer);
 934                if (buffer.len == 40)
 935                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 936                else if (!prefixcmp(buffer.buf, "ref: ")) {
 937                        ref->symref = xstrdup(buffer.buf + 5);
 938                        ret = 0;
 939                }
 940        }
 941
 942        strbuf_release(&buffer);
 943        free(url);
 944        return ret;
 945}
 946
 947/* Helpers for fetching packs */
 948static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 949{
 950        char *url, *tmp;
 951        struct strbuf buf = STRBUF_INIT;
 952
 953        if (http_is_verbose)
 954                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 955
 956        end_url_with_slash(&buf, base_url);
 957        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 958        url = strbuf_detach(&buf, NULL);
 959
 960        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 961        tmp = strbuf_detach(&buf, NULL);
 962
 963        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 964                error("Unable to get pack index %s\n", url);
 965                free(tmp);
 966                tmp = NULL;
 967        }
 968
 969        free(url);
 970        return tmp;
 971}
 972
 973static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 974        unsigned char *sha1, const char *base_url)
 975{
 976        struct packed_git *new_pack;
 977        char *tmp_idx = NULL;
 978        int ret;
 979
 980        if (has_pack_index(sha1)) {
 981                new_pack = parse_pack_index(sha1, NULL);
 982                if (!new_pack)
 983                        return -1; /* parse_pack_index() already issued error message */
 984                goto add_pack;
 985        }
 986
 987        tmp_idx = fetch_pack_index(sha1, base_url);
 988        if (!tmp_idx)
 989                return -1;
 990
 991        new_pack = parse_pack_index(sha1, tmp_idx);
 992        if (!new_pack) {
 993                unlink(tmp_idx);
 994                free(tmp_idx);
 995
 996                return -1; /* parse_pack_index() already issued error message */
 997        }
 998
 999        ret = verify_pack_index(new_pack);
1000        if (!ret) {
1001                close_pack_index(new_pack);
1002                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1003        }
1004        free(tmp_idx);
1005        if (ret)
1006                return -1;
1007
1008add_pack:
1009        new_pack->next = *packs_head;
1010        *packs_head = new_pack;
1011        return 0;
1012}
1013
1014int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1015{
1016        int ret = 0, i = 0;
1017        char *url, *data;
1018        struct strbuf buf = STRBUF_INIT;
1019        unsigned char sha1[20];
1020
1021        end_url_with_slash(&buf, base_url);
1022        strbuf_addstr(&buf, "objects/info/packs");
1023        url = strbuf_detach(&buf, NULL);
1024
1025        ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1026        if (ret != HTTP_OK)
1027                goto cleanup;
1028
1029        data = buf.buf;
1030        while (i < buf.len) {
1031                switch (data[i]) {
1032                case 'P':
1033                        i++;
1034                        if (i + 52 <= buf.len &&
1035                            !prefixcmp(data + i, " pack-") &&
1036                            !prefixcmp(data + i + 46, ".pack\n")) {
1037                                get_sha1_hex(data + i + 6, sha1);
1038                                fetch_and_setup_pack_index(packs_head, sha1,
1039                                                      base_url);
1040                                i += 51;
1041                                break;
1042                        }
1043                default:
1044                        while (i < buf.len && data[i] != '\n')
1045                                i++;
1046                }
1047                i++;
1048        }
1049
1050cleanup:
1051        free(url);
1052        return ret;
1053}
1054
1055void release_http_pack_request(struct http_pack_request *preq)
1056{
1057        if (preq->packfile != NULL) {
1058                fclose(preq->packfile);
1059                preq->packfile = NULL;
1060        }
1061        if (preq->range_header != NULL) {
1062                curl_slist_free_all(preq->range_header);
1063                preq->range_header = NULL;
1064        }
1065        preq->slot = NULL;
1066        free(preq->url);
1067}
1068
1069int finish_http_pack_request(struct http_pack_request *preq)
1070{
1071        struct packed_git **lst;
1072        struct packed_git *p = preq->target;
1073        char *tmp_idx;
1074        struct child_process ip;
1075        const char *ip_argv[8];
1076
1077        close_pack_index(p);
1078
1079        fclose(preq->packfile);
1080        preq->packfile = NULL;
1081
1082        lst = preq->lst;
1083        while (*lst != p)
1084                lst = &((*lst)->next);
1085        *lst = (*lst)->next;
1086
1087        tmp_idx = xstrdup(preq->tmpfile);
1088        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1089               ".idx.temp");
1090
1091        ip_argv[0] = "index-pack";
1092        ip_argv[1] = "-o";
1093        ip_argv[2] = tmp_idx;
1094        ip_argv[3] = preq->tmpfile;
1095        ip_argv[4] = NULL;
1096
1097        memset(&ip, 0, sizeof(ip));
1098        ip.argv = ip_argv;
1099        ip.git_cmd = 1;
1100        ip.no_stdin = 1;
1101        ip.no_stdout = 1;
1102
1103        if (run_command(&ip)) {
1104                unlink(preq->tmpfile);
1105                unlink(tmp_idx);
1106                free(tmp_idx);
1107                return -1;
1108        }
1109
1110        unlink(sha1_pack_index_name(p->sha1));
1111
1112        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1113         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1114                free(tmp_idx);
1115                return -1;
1116        }
1117
1118        install_packed_git(p);
1119        free(tmp_idx);
1120        return 0;
1121}
1122
1123struct http_pack_request *new_http_pack_request(
1124        struct packed_git *target, const char *base_url)
1125{
1126        long prev_posn = 0;
1127        char range[RANGE_HEADER_SIZE];
1128        struct strbuf buf = STRBUF_INIT;
1129        struct http_pack_request *preq;
1130
1131        preq = xcalloc(1, sizeof(*preq));
1132        preq->target = target;
1133
1134        end_url_with_slash(&buf, base_url);
1135        strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1136                sha1_to_hex(target->sha1));
1137        preq->url = strbuf_detach(&buf, NULL);
1138
1139        snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1140                sha1_pack_name(target->sha1));
1141        preq->packfile = fopen(preq->tmpfile, "a");
1142        if (!preq->packfile) {
1143                error("Unable to open local file %s for pack",
1144                      preq->tmpfile);
1145                goto abort;
1146        }
1147
1148        preq->slot = get_active_slot();
1149        curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1150        curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1151        curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1152        curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1153                no_pragma_header);
1154
1155        /*
1156         * If there is data present from a previous transfer attempt,
1157         * resume where it left off
1158         */
1159        prev_posn = ftell(preq->packfile);
1160        if (prev_posn>0) {
1161                if (http_is_verbose)
1162                        fprintf(stderr,
1163                                "Resuming fetch of pack %s at byte %ld\n",
1164                                sha1_to_hex(target->sha1), prev_posn);
1165                sprintf(range, "Range: bytes=%ld-", prev_posn);
1166                preq->range_header = curl_slist_append(NULL, range);
1167                curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1168                        preq->range_header);
1169        }
1170
1171        return preq;
1172
1173abort:
1174        free(preq->url);
1175        free(preq);
1176        return NULL;
1177}
1178
1179/* Helpers for fetching objects (loose) */
1180static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1181                               void *data)
1182{
1183        unsigned char expn[4096];
1184        size_t size = eltsize * nmemb;
1185        int posn = 0;
1186        struct http_object_request *freq =
1187                (struct http_object_request *)data;
1188        do {
1189                ssize_t retval = xwrite(freq->localfile,
1190                                        (char *) ptr + posn, size - posn);
1191                if (retval < 0)
1192                        return posn;
1193                posn += retval;
1194        } while (posn < size);
1195
1196        freq->stream.avail_in = size;
1197        freq->stream.next_in = (void *)ptr;
1198        do {
1199                freq->stream.next_out = expn;
1200                freq->stream.avail_out = sizeof(expn);
1201                freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1202                git_SHA1_Update(&freq->c, expn,
1203                                sizeof(expn) - freq->stream.avail_out);
1204        } while (freq->stream.avail_in && freq->zret == Z_OK);
1205        return size;
1206}
1207
1208struct http_object_request *new_http_object_request(const char *base_url,
1209        unsigned char *sha1)
1210{
1211        char *hex = sha1_to_hex(sha1);
1212        char *filename;
1213        char prevfile[PATH_MAX];
1214        int prevlocal;
1215        char prev_buf[PREV_BUF_SIZE];
1216        ssize_t prev_read = 0;
1217        long prev_posn = 0;
1218        char range[RANGE_HEADER_SIZE];
1219        struct curl_slist *range_header = NULL;
1220        struct http_object_request *freq;
1221
1222        freq = xcalloc(1, sizeof(*freq));
1223        hashcpy(freq->sha1, sha1);
1224        freq->localfile = -1;
1225
1226        filename = sha1_file_name(sha1);
1227        snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1228                 "%s.temp", filename);
1229
1230        snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1231        unlink_or_warn(prevfile);
1232        rename(freq->tmpfile, prevfile);
1233        unlink_or_warn(freq->tmpfile);
1234
1235        if (freq->localfile != -1)
1236                error("fd leakage in start: %d", freq->localfile);
1237        freq->localfile = open(freq->tmpfile,
1238                               O_WRONLY | O_CREAT | O_EXCL, 0666);
1239        /*
1240         * This could have failed due to the "lazy directory creation";
1241         * try to mkdir the last path component.
1242         */
1243        if (freq->localfile < 0 && errno == ENOENT) {
1244                char *dir = strrchr(freq->tmpfile, '/');
1245                if (dir) {
1246                        *dir = 0;
1247                        mkdir(freq->tmpfile, 0777);
1248                        *dir = '/';
1249                }
1250                freq->localfile = open(freq->tmpfile,
1251                                       O_WRONLY | O_CREAT | O_EXCL, 0666);
1252        }
1253
1254        if (freq->localfile < 0) {
1255                error("Couldn't create temporary file %s: %s",
1256                      freq->tmpfile, strerror(errno));
1257                goto abort;
1258        }
1259
1260        git_inflate_init(&freq->stream);
1261
1262        git_SHA1_Init(&freq->c);
1263
1264        freq->url = get_remote_object_url(base_url, hex, 0);
1265
1266        /*
1267         * If a previous temp file is present, process what was already
1268         * fetched.
1269         */
1270        prevlocal = open(prevfile, O_RDONLY);
1271        if (prevlocal != -1) {
1272                do {
1273                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1274                        if (prev_read>0) {
1275                                if (fwrite_sha1_file(prev_buf,
1276                                                     1,
1277                                                     prev_read,
1278                                                     freq) == prev_read) {
1279                                        prev_posn += prev_read;
1280                                } else {
1281                                        prev_read = -1;
1282                                }
1283                        }
1284                } while (prev_read > 0);
1285                close(prevlocal);
1286        }
1287        unlink_or_warn(prevfile);
1288
1289        /*
1290         * Reset inflate/SHA1 if there was an error reading the previous temp
1291         * file; also rewind to the beginning of the local file.
1292         */
1293        if (prev_read == -1) {
1294                memset(&freq->stream, 0, sizeof(freq->stream));
1295                git_inflate_init(&freq->stream);
1296                git_SHA1_Init(&freq->c);
1297                if (prev_posn>0) {
1298                        prev_posn = 0;
1299                        lseek(freq->localfile, 0, SEEK_SET);
1300                        if (ftruncate(freq->localfile, 0) < 0) {
1301                                error("Couldn't truncate temporary file %s: %s",
1302                                          freq->tmpfile, strerror(errno));
1303                                goto abort;
1304                        }
1305                }
1306        }
1307
1308        freq->slot = get_active_slot();
1309
1310        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1311        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1312        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1313        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1314        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1315
1316        /*
1317         * If we have successfully processed data from a previous fetch
1318         * attempt, only fetch the data we don't already have.
1319         */
1320        if (prev_posn>0) {
1321                if (http_is_verbose)
1322                        fprintf(stderr,
1323                                "Resuming fetch of object %s at byte %ld\n",
1324                                hex, prev_posn);
1325                sprintf(range, "Range: bytes=%ld-", prev_posn);
1326                range_header = curl_slist_append(range_header, range);
1327                curl_easy_setopt(freq->slot->curl,
1328                                 CURLOPT_HTTPHEADER, range_header);
1329        }
1330
1331        return freq;
1332
1333abort:
1334        free(freq->url);
1335        free(freq);
1336        return NULL;
1337}
1338
1339void process_http_object_request(struct http_object_request *freq)
1340{
1341        if (freq->slot == NULL)
1342                return;
1343        freq->curl_result = freq->slot->curl_result;
1344        freq->http_code = freq->slot->http_code;
1345        freq->slot = NULL;
1346}
1347
1348int finish_http_object_request(struct http_object_request *freq)
1349{
1350        struct stat st;
1351
1352        close(freq->localfile);
1353        freq->localfile = -1;
1354
1355        process_http_object_request(freq);
1356
1357        if (freq->http_code == 416) {
1358                warning("requested range invalid; we may already have all the data.");
1359        } else if (freq->curl_result != CURLE_OK) {
1360                if (stat(freq->tmpfile, &st) == 0)
1361                        if (st.st_size == 0)
1362                                unlink_or_warn(freq->tmpfile);
1363                return -1;
1364        }
1365
1366        git_inflate_end(&freq->stream);
1367        git_SHA1_Final(freq->real_sha1, &freq->c);
1368        if (freq->zret != Z_STREAM_END) {
1369                unlink_or_warn(freq->tmpfile);
1370                return -1;
1371        }
1372        if (hashcmp(freq->sha1, freq->real_sha1)) {
1373                unlink_or_warn(freq->tmpfile);
1374                return -1;
1375        }
1376        freq->rename =
1377                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1378
1379        return freq->rename;
1380}
1381
1382void abort_http_object_request(struct http_object_request *freq)
1383{
1384        unlink_or_warn(freq->tmpfile);
1385
1386        release_http_object_request(freq);
1387}
1388
1389void release_http_object_request(struct http_object_request *freq)
1390{
1391        if (freq->localfile != -1) {
1392                close(freq->localfile);
1393                freq->localfile = -1;
1394        }
1395        if (freq->url != NULL) {
1396                free(freq->url);
1397                freq->url = NULL;
1398        }
1399        if (freq->slot != NULL) {
1400                freq->slot->callback_func = NULL;
1401                freq->slot->callback_data = NULL;
1402                release_active_slot(freq->slot);
1403                freq->slot = NULL;
1404        }
1405}