Andrew's git / gitweb.git / http.c
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http.con commit Merge branch 'sn/http-auth-with-netrc-fix' (78c17b9)
   1#include "http.h"
   2#include "pack.h"
   3#include "sideband.h"
   4#include "run-command.h"
   5#include "url.h"
   6
   7int data_received;
   8int active_requests;
   9int http_is_verbose;
  10size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  11
  12#if LIBCURL_VERSION_NUM >= 0x070a06
  13#define LIBCURL_CAN_HANDLE_AUTH_ANY
  14#endif
  15
  16static int min_curl_sessions = 1;
  17static int curl_session_count;
  18#ifdef USE_CURL_MULTI
  19static int max_requests = -1;
  20static CURLM *curlm;
  21#endif
  22#ifndef NO_CURL_EASY_DUPHANDLE
  23static CURL *curl_default;
  24#endif
  25
  26#define PREV_BUF_SIZE 4096
  27#define RANGE_HEADER_SIZE 30
  28
  29char curl_errorstr[CURL_ERROR_SIZE];
  30
  31static int curl_ssl_verify = -1;
  32static const char *ssl_cert;
  33#if LIBCURL_VERSION_NUM >= 0x070903
  34static const char *ssl_key;
  35#endif
  36#if LIBCURL_VERSION_NUM >= 0x070908
  37static const char *ssl_capath;
  38#endif
  39static const char *ssl_cainfo;
  40static long curl_low_speed_limit = -1;
  41static long curl_low_speed_time = -1;
  42static int curl_ftp_no_epsv;
  43static const char *curl_http_proxy;
  44static const char *curl_cookie_file;
  45static char *user_name, *user_pass, *description;
  46static const char *user_agent;
  47
  48#if LIBCURL_VERSION_NUM >= 0x071700
  49/* Use CURLOPT_KEYPASSWD as is */
  50#elif LIBCURL_VERSION_NUM >= 0x070903
  51#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  52#else
  53#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  54#endif
  55
  56static char *ssl_cert_password;
  57static int ssl_cert_password_required;
  58
  59static struct curl_slist *pragma_header;
  60static struct curl_slist *no_pragma_header;
  61
  62static struct active_request_slot *active_queue_head;
  63
  64size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  65{
  66        size_t size = eltsize * nmemb;
  67        struct buffer *buffer = buffer_;
  68
  69        if (size > buffer->buf.len - buffer->posn)
  70                size = buffer->buf.len - buffer->posn;
  71        memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  72        buffer->posn += size;
  73
  74        return size;
  75}
  76
  77#ifndef NO_CURL_IOCTL
  78curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  79{
  80        struct buffer *buffer = clientp;
  81
  82        switch (cmd) {
  83        case CURLIOCMD_NOP:
  84                return CURLIOE_OK;
  85
  86        case CURLIOCMD_RESTARTREAD:
  87                buffer->posn = 0;
  88                return CURLIOE_OK;
  89
  90        default:
  91                return CURLIOE_UNKNOWNCMD;
  92        }
  93}
  94#endif
  95
  96size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  97{
  98        size_t size = eltsize * nmemb;
  99        struct strbuf *buffer = buffer_;
 100
 101        strbuf_add(buffer, ptr, size);
 102        data_received++;
 103        return size;
 104}
 105
 106size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 107{
 108        data_received++;
 109        return eltsize * nmemb;
 110}
 111
 112#ifdef USE_CURL_MULTI
 113static void process_curl_messages(void)
 114{
 115        int num_messages;
 116        struct active_request_slot *slot;
 117        CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 118
 119        while (curl_message != NULL) {
 120                if (curl_message->msg == CURLMSG_DONE) {
 121                        int curl_result = curl_message->data.result;
 122                        slot = active_queue_head;
 123                        while (slot != NULL &&
 124                               slot->curl != curl_message->easy_handle)
 125                                slot = slot->next;
 126                        if (slot != NULL) {
 127                                curl_multi_remove_handle(curlm, slot->curl);
 128                                slot->curl_result = curl_result;
 129                                finish_active_slot(slot);
 130                        } else {
 131                                fprintf(stderr, "Received DONE message for unknown request!\n");
 132                        }
 133                } else {
 134                        fprintf(stderr, "Unknown CURL message received: %d\n",
 135                                (int)curl_message->msg);
 136                }
 137                curl_message = curl_multi_info_read(curlm, &num_messages);
 138        }
 139}
 140#endif
 141
 142static char *git_getpass_with_description(const char *what, const char *desc)
 143{
 144        struct strbuf prompt = STRBUF_INIT;
 145        char *r;
 146
 147        if (desc)
 148                strbuf_addf(&prompt, "%s for '%s': ", what, desc);
 149        else
 150                strbuf_addf(&prompt, "%s: ", what);
 151        /*
 152         * NEEDSWORK: for usernames, we should do something less magical that
 153         * actually echoes the characters. However, we need to read from
 154         * /dev/tty and not stdio, which is not portable (but getpass will do
 155         * it for us). http.c uses the same workaround.
 156         */
 157        r = git_getpass(prompt.buf);
 158
 159        strbuf_release(&prompt);
 160        return xstrdup(r);
 161}
 162
 163static int http_options(const char *var, const char *value, void *cb)
 164{
 165        if (!strcmp("http.sslverify", var)) {
 166                curl_ssl_verify = git_config_bool(var, value);
 167                return 0;
 168        }
 169        if (!strcmp("http.sslcert", var))
 170                return git_config_string(&ssl_cert, var, value);
 171#if LIBCURL_VERSION_NUM >= 0x070903
 172        if (!strcmp("http.sslkey", var))
 173                return git_config_string(&ssl_key, var, value);
 174#endif
 175#if LIBCURL_VERSION_NUM >= 0x070908
 176        if (!strcmp("http.sslcapath", var))
 177                return git_config_string(&ssl_capath, var, value);
 178#endif
 179        if (!strcmp("http.sslcainfo", var))
 180                return git_config_string(&ssl_cainfo, var, value);
 181        if (!strcmp("http.sslcertpasswordprotected", var)) {
 182                if (git_config_bool(var, value))
 183                        ssl_cert_password_required = 1;
 184                return 0;
 185        }
 186        if (!strcmp("http.minsessions", var)) {
 187                min_curl_sessions = git_config_int(var, value);
 188#ifndef USE_CURL_MULTI
 189                if (min_curl_sessions > 1)
 190                        min_curl_sessions = 1;
 191#endif
 192                return 0;
 193        }
 194#ifdef USE_CURL_MULTI
 195        if (!strcmp("http.maxrequests", var)) {
 196                max_requests = git_config_int(var, value);
 197                return 0;
 198        }
 199#endif
 200        if (!strcmp("http.lowspeedlimit", var)) {
 201                curl_low_speed_limit = (long)git_config_int(var, value);
 202                return 0;
 203        }
 204        if (!strcmp("http.lowspeedtime", var)) {
 205                curl_low_speed_time = (long)git_config_int(var, value);
 206                return 0;
 207        }
 208
 209        if (!strcmp("http.noepsv", var)) {
 210                curl_ftp_no_epsv = git_config_bool(var, value);
 211                return 0;
 212        }
 213        if (!strcmp("http.proxy", var))
 214                return git_config_string(&curl_http_proxy, var, value);
 215
 216        if (!strcmp("http.cookiefile", var))
 217                return git_config_string(&curl_cookie_file, var, value);
 218
 219        if (!strcmp("http.postbuffer", var)) {
 220                http_post_buffer = git_config_int(var, value);
 221                if (http_post_buffer < LARGE_PACKET_MAX)
 222                        http_post_buffer = LARGE_PACKET_MAX;
 223                return 0;
 224        }
 225
 226        if (!strcmp("http.useragent", var))
 227                return git_config_string(&user_agent, var, value);
 228
 229        /* Fall back on the default ones */
 230        return git_default_config(var, value, cb);
 231}
 232
 233static void init_curl_http_auth(CURL *result)
 234{
 235        if (user_name) {
 236                struct strbuf up = STRBUF_INIT;
 237                if (!user_pass)
 238                        user_pass = xstrdup(git_getpass_with_description("Password", description));
 239                strbuf_addf(&up, "%s:%s", user_name, user_pass);
 240                curl_easy_setopt(result, CURLOPT_USERPWD,
 241                                 strbuf_detach(&up, NULL));
 242        }
 243}
 244
 245static int has_cert_password(void)
 246{
 247        if (ssl_cert_password != NULL)
 248                return 1;
 249        if (ssl_cert == NULL || ssl_cert_password_required != 1)
 250                return 0;
 251        /* Only prompt the user once. */
 252        ssl_cert_password_required = -1;
 253        ssl_cert_password = git_getpass_with_description("Certificate Password", description);
 254        if (ssl_cert_password != NULL) {
 255                ssl_cert_password = xstrdup(ssl_cert_password);
 256                return 1;
 257        } else
 258                return 0;
 259}
 260
 261static CURL *get_curl_handle(void)
 262{
 263        CURL *result = curl_easy_init();
 264
 265        if (!curl_ssl_verify) {
 266                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 267                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 268        } else {
 269                /* Verify authenticity of the peer's certificate */
 270                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 271                /* The name in the cert must match whom we tried to connect */
 272                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 273        }
 274
 275#if LIBCURL_VERSION_NUM >= 0x070907
 276        curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 277#endif
 278#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 279        curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 280#endif
 281
 282        if (ssl_cert != NULL)
 283                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 284        if (has_cert_password())
 285                curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 286#if LIBCURL_VERSION_NUM >= 0x070903
 287        if (ssl_key != NULL)
 288                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 289#endif
 290#if LIBCURL_VERSION_NUM >= 0x070908
 291        if (ssl_capath != NULL)
 292                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 293#endif
 294        if (ssl_cainfo != NULL)
 295                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 296        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 297
 298        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 299                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 300                                 curl_low_speed_limit);
 301                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 302                                 curl_low_speed_time);
 303        }
 304
 305        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 306#if LIBCURL_VERSION_NUM >= 0x071301
 307        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 308#elif LIBCURL_VERSION_NUM >= 0x071101
 309        curl_easy_setopt(result, CURLOPT_POST301, 1);
 310#endif
 311
 312        if (getenv("GIT_CURL_VERBOSE"))
 313                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 314
 315        curl_easy_setopt(result, CURLOPT_USERAGENT,
 316                user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 317
 318        if (curl_ftp_no_epsv)
 319                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 320
 321        if (curl_http_proxy)
 322                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 323
 324        return result;
 325}
 326
 327static void http_auth_init(const char *url)
 328{
 329        const char *at, *colon, *cp, *slash, *host;
 330
 331        cp = strstr(url, "://");
 332        if (!cp)
 333                return;
 334
 335        /*
 336         * Ok, the URL looks like "proto://something".  Which one?
 337         * "proto://<user>:<pass>@<host>/...",
 338         * "proto://<user>@<host>/...", or just
 339         * "proto://<host>/..."?
 340         */
 341        cp += 3;
 342        at = strchr(cp, '@');
 343        colon = strchr(cp, ':');
 344        slash = strchrnul(cp, '/');
 345        if (!at || slash <= at) {
 346                /* No credentials, but we may have to ask for some later */
 347                host = cp;
 348        }
 349        else if (!colon || at <= colon) {
 350                /* Only username */
 351                user_name = url_decode_mem(cp, at - cp);
 352                user_pass = NULL;
 353                host = at + 1;
 354        } else {
 355                user_name = url_decode_mem(cp, colon - cp);
 356                user_pass = url_decode_mem(colon + 1, at - (colon + 1));
 357                host = at + 1;
 358        }
 359
 360        description = url_decode_mem(host, slash - host);
 361}
 362
 363static void set_from_env(const char **var, const char *envname)
 364{
 365        const char *val = getenv(envname);
 366        if (val)
 367                *var = val;
 368}
 369
 370void http_init(struct remote *remote, const char *url)
 371{
 372        char *low_speed_limit;
 373        char *low_speed_time;
 374
 375        http_is_verbose = 0;
 376
 377        git_config(http_options, NULL);
 378
 379        curl_global_init(CURL_GLOBAL_ALL);
 380
 381        if (remote && remote->http_proxy)
 382                curl_http_proxy = xstrdup(remote->http_proxy);
 383
 384        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 385        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 386
 387#ifdef USE_CURL_MULTI
 388        {
 389                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 390                if (http_max_requests != NULL)
 391                        max_requests = atoi(http_max_requests);
 392        }
 393
 394        curlm = curl_multi_init();
 395        if (curlm == NULL) {
 396                fprintf(stderr, "Error creating curl multi handle.\n");
 397                exit(1);
 398        }
 399#endif
 400
 401        if (getenv("GIT_SSL_NO_VERIFY"))
 402                curl_ssl_verify = 0;
 403
 404        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 405#if LIBCURL_VERSION_NUM >= 0x070903
 406        set_from_env(&ssl_key, "GIT_SSL_KEY");
 407#endif
 408#if LIBCURL_VERSION_NUM >= 0x070908
 409        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 410#endif
 411        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 412
 413        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 414
 415        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 416        if (low_speed_limit != NULL)
 417                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 418        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 419        if (low_speed_time != NULL)
 420                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 421
 422        if (curl_ssl_verify == -1)
 423                curl_ssl_verify = 1;
 424
 425        curl_session_count = 0;
 426#ifdef USE_CURL_MULTI
 427        if (max_requests < 1)
 428                max_requests = DEFAULT_MAX_REQUESTS;
 429#endif
 430
 431        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 432                curl_ftp_no_epsv = 1;
 433
 434        if (url) {
 435                http_auth_init(url);
 436                if (!ssl_cert_password_required &&
 437                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 438                    !prefixcmp(url, "https://"))
 439                        ssl_cert_password_required = 1;
 440        }
 441
 442#ifndef NO_CURL_EASY_DUPHANDLE
 443        curl_default = get_curl_handle();
 444#endif
 445}
 446
 447void http_cleanup(void)
 448{
 449        struct active_request_slot *slot = active_queue_head;
 450
 451        while (slot != NULL) {
 452                struct active_request_slot *next = slot->next;
 453                if (slot->curl != NULL) {
 454#ifdef USE_CURL_MULTI
 455                        curl_multi_remove_handle(curlm, slot->curl);
 456#endif
 457                        curl_easy_cleanup(slot->curl);
 458                }
 459                free(slot);
 460                slot = next;
 461        }
 462        active_queue_head = NULL;
 463
 464#ifndef NO_CURL_EASY_DUPHANDLE
 465        curl_easy_cleanup(curl_default);
 466#endif
 467
 468#ifdef USE_CURL_MULTI
 469        curl_multi_cleanup(curlm);
 470#endif
 471        curl_global_cleanup();
 472
 473        curl_slist_free_all(pragma_header);
 474        pragma_header = NULL;
 475
 476        curl_slist_free_all(no_pragma_header);
 477        no_pragma_header = NULL;
 478
 479        if (curl_http_proxy) {
 480                free((void *)curl_http_proxy);
 481                curl_http_proxy = NULL;
 482        }
 483
 484        if (ssl_cert_password != NULL) {
 485                memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 486                free(ssl_cert_password);
 487                ssl_cert_password = NULL;
 488        }
 489        ssl_cert_password_required = 0;
 490}
 491
 492struct active_request_slot *get_active_slot(void)
 493{
 494        struct active_request_slot *slot = active_queue_head;
 495        struct active_request_slot *newslot;
 496
 497#ifdef USE_CURL_MULTI
 498        int num_transfers;
 499
 500        /* Wait for a slot to open up if the queue is full */
 501        while (active_requests >= max_requests) {
 502                curl_multi_perform(curlm, &num_transfers);
 503                if (num_transfers < active_requests)
 504                        process_curl_messages();
 505        }
 506#endif
 507
 508        while (slot != NULL && slot->in_use)
 509                slot = slot->next;
 510
 511        if (slot == NULL) {
 512                newslot = xmalloc(sizeof(*newslot));
 513                newslot->curl = NULL;
 514                newslot->in_use = 0;
 515                newslot->next = NULL;
 516
 517                slot = active_queue_head;
 518                if (slot == NULL) {
 519                        active_queue_head = newslot;
 520                } else {
 521                        while (slot->next != NULL)
 522                                slot = slot->next;
 523                        slot->next = newslot;
 524                }
 525                slot = newslot;
 526        }
 527
 528        if (slot->curl == NULL) {
 529#ifdef NO_CURL_EASY_DUPHANDLE
 530                slot->curl = get_curl_handle();
 531#else
 532                slot->curl = curl_easy_duphandle(curl_default);
 533#endif
 534                curl_session_count++;
 535        }
 536
 537        active_requests++;
 538        slot->in_use = 1;
 539        slot->local = NULL;
 540        slot->results = NULL;
 541        slot->finished = NULL;
 542        slot->callback_data = NULL;
 543        slot->callback_func = NULL;
 544        curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 545        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 546        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 547        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 548        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 549        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 550        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 551        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 552        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 553
 554        return slot;
 555}
 556
 557int start_active_slot(struct active_request_slot *slot)
 558{
 559#ifdef USE_CURL_MULTI
 560        CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 561        int num_transfers;
 562
 563        if (curlm_result != CURLM_OK &&
 564            curlm_result != CURLM_CALL_MULTI_PERFORM) {
 565                active_requests--;
 566                slot->in_use = 0;
 567                return 0;
 568        }
 569
 570        /*
 571         * We know there must be something to do, since we just added
 572         * something.
 573         */
 574        curl_multi_perform(curlm, &num_transfers);
 575#endif
 576        return 1;
 577}
 578
 579#ifdef USE_CURL_MULTI
 580struct fill_chain {
 581        void *data;
 582        int (*fill)(void *);
 583        struct fill_chain *next;
 584};
 585
 586static struct fill_chain *fill_cfg;
 587
 588void add_fill_function(void *data, int (*fill)(void *))
 589{
 590        struct fill_chain *new = xmalloc(sizeof(*new));
 591        struct fill_chain **linkp = &fill_cfg;
 592        new->data = data;
 593        new->fill = fill;
 594        new->next = NULL;
 595        while (*linkp)
 596                linkp = &(*linkp)->next;
 597        *linkp = new;
 598}
 599
 600void fill_active_slots(void)
 601{
 602        struct active_request_slot *slot = active_queue_head;
 603
 604        while (active_requests < max_requests) {
 605                struct fill_chain *fill;
 606                for (fill = fill_cfg; fill; fill = fill->next)
 607                        if (fill->fill(fill->data))
 608                                break;
 609
 610                if (!fill)
 611                        break;
 612        }
 613
 614        while (slot != NULL) {
 615                if (!slot->in_use && slot->curl != NULL
 616                        && curl_session_count > min_curl_sessions) {
 617                        curl_easy_cleanup(slot->curl);
 618                        slot->curl = NULL;
 619                        curl_session_count--;
 620                }
 621                slot = slot->next;
 622        }
 623}
 624
 625void step_active_slots(void)
 626{
 627        int num_transfers;
 628        CURLMcode curlm_result;
 629
 630        do {
 631                curlm_result = curl_multi_perform(curlm, &num_transfers);
 632        } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 633        if (num_transfers < active_requests) {
 634                process_curl_messages();
 635                fill_active_slots();
 636        }
 637}
 638#endif
 639
 640void run_active_slot(struct active_request_slot *slot)
 641{
 642#ifdef USE_CURL_MULTI
 643        long last_pos = 0;
 644        long current_pos;
 645        fd_set readfds;
 646        fd_set writefds;
 647        fd_set excfds;
 648        int max_fd;
 649        struct timeval select_timeout;
 650        int finished = 0;
 651
 652        slot->finished = &finished;
 653        while (!finished) {
 654                data_received = 0;
 655                step_active_slots();
 656
 657                if (!data_received && slot->local != NULL) {
 658                        current_pos = ftell(slot->local);
 659                        if (current_pos > last_pos)
 660                                data_received++;
 661                        last_pos = current_pos;
 662                }
 663
 664                if (slot->in_use && !data_received) {
 665                        max_fd = 0;
 666                        FD_ZERO(&readfds);
 667                        FD_ZERO(&writefds);
 668                        FD_ZERO(&excfds);
 669                        select_timeout.tv_sec = 0;
 670                        select_timeout.tv_usec = 50000;
 671                        select(max_fd, &readfds, &writefds,
 672                               &excfds, &select_timeout);
 673                }
 674        }
 675#else
 676        while (slot->in_use) {
 677                slot->curl_result = curl_easy_perform(slot->curl);
 678                finish_active_slot(slot);
 679        }
 680#endif
 681}
 682
 683static void closedown_active_slot(struct active_request_slot *slot)
 684{
 685        active_requests--;
 686        slot->in_use = 0;
 687}
 688
 689static void release_active_slot(struct active_request_slot *slot)
 690{
 691        closedown_active_slot(slot);
 692        if (slot->curl && curl_session_count > min_curl_sessions) {
 693#ifdef USE_CURL_MULTI
 694                curl_multi_remove_handle(curlm, slot->curl);
 695#endif
 696                curl_easy_cleanup(slot->curl);
 697                slot->curl = NULL;
 698                curl_session_count--;
 699        }
 700#ifdef USE_CURL_MULTI
 701        fill_active_slots();
 702#endif
 703}
 704
 705void finish_active_slot(struct active_request_slot *slot)
 706{
 707        closedown_active_slot(slot);
 708        curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 709
 710        if (slot->finished != NULL)
 711                (*slot->finished) = 1;
 712
 713        /* Store slot results so they can be read after the slot is reused */
 714        if (slot->results != NULL) {
 715                slot->results->curl_result = slot->curl_result;
 716                slot->results->http_code = slot->http_code;
 717        }
 718
 719        /* Run callback if appropriate */
 720        if (slot->callback_func != NULL)
 721                slot->callback_func(slot->callback_data);
 722}
 723
 724void finish_all_active_slots(void)
 725{
 726        struct active_request_slot *slot = active_queue_head;
 727
 728        while (slot != NULL)
 729                if (slot->in_use) {
 730                        run_active_slot(slot);
 731                        slot = active_queue_head;
 732                } else {
 733                        slot = slot->next;
 734                }
 735}
 736
 737/* Helpers for modifying and creating URLs */
 738static inline int needs_quote(int ch)
 739{
 740        if (((ch >= 'A') && (ch <= 'Z'))
 741                        || ((ch >= 'a') && (ch <= 'z'))
 742                        || ((ch >= '0') && (ch <= '9'))
 743                        || (ch == '/')
 744                        || (ch == '-')
 745                        || (ch == '.'))
 746                return 0;
 747        return 1;
 748}
 749
 750static inline int hex(int v)
 751{
 752        if (v < 10)
 753                return '0' + v;
 754        else
 755                return 'A' + v - 10;
 756}
 757
 758static char *quote_ref_url(const char *base, const char *ref)
 759{
 760        struct strbuf buf = STRBUF_INIT;
 761        const char *cp;
 762        int ch;
 763
 764        end_url_with_slash(&buf, base);
 765
 766        for (cp = ref; (ch = *cp) != 0; cp++)
 767                if (needs_quote(ch))
 768                        strbuf_addf(&buf, "%%%02x", ch);
 769                else
 770                        strbuf_addch(&buf, *cp);
 771
 772        return strbuf_detach(&buf, NULL);
 773}
 774
 775void append_remote_object_url(struct strbuf *buf, const char *url,
 776                              const char *hex,
 777                              int only_two_digit_prefix)
 778{
 779        end_url_with_slash(buf, url);
 780
 781        strbuf_addf(buf, "objects/%.*s/", 2, hex);
 782        if (!only_two_digit_prefix)
 783                strbuf_addf(buf, "%s", hex+2);
 784}
 785
 786char *get_remote_object_url(const char *url, const char *hex,
 787                            int only_two_digit_prefix)
 788{
 789        struct strbuf buf = STRBUF_INIT;
 790        append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 791        return strbuf_detach(&buf, NULL);
 792}
 793
 794/* http_request() targets */
 795#define HTTP_REQUEST_STRBUF     0
 796#define HTTP_REQUEST_FILE       1
 797
 798static int http_request(const char *url, void *result, int target, int options)
 799{
 800        struct active_request_slot *slot;
 801        struct slot_results results;
 802        struct curl_slist *headers = NULL;
 803        struct strbuf buf = STRBUF_INIT;
 804        int ret;
 805
 806        slot = get_active_slot();
 807        slot->results = &results;
 808        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 809
 810        if (result == NULL) {
 811                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 812        } else {
 813                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 814                curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 815
 816                if (target == HTTP_REQUEST_FILE) {
 817                        long posn = ftell(result);
 818                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 819                                         fwrite);
 820                        if (posn > 0) {
 821                                strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 822                                headers = curl_slist_append(headers, buf.buf);
 823                                strbuf_reset(&buf);
 824                        }
 825                        slot->local = result;
 826                } else
 827                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 828                                         fwrite_buffer);
 829        }
 830
 831        strbuf_addstr(&buf, "Pragma:");
 832        if (options & HTTP_NO_CACHE)
 833                strbuf_addstr(&buf, " no-cache");
 834
 835        headers = curl_slist_append(headers, buf.buf);
 836
 837        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 838        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 839
 840        if (start_active_slot(slot)) {
 841                run_active_slot(slot);
 842                if (results.curl_result == CURLE_OK)
 843                        ret = HTTP_OK;
 844                else if (missing_target(&results))
 845                        ret = HTTP_MISSING_TARGET;
 846                else if (results.http_code == 401) {
 847                        if (user_name && user_pass) {
 848                                ret = HTTP_NOAUTH;
 849                        } else {
 850                                /*
 851                                 * git_getpass is needed here because its very likely stdin/stdout are
 852                                 * pipes to our parent process.  So we instead need to use /dev/tty,
 853                                 * but that is non-portable.  Using git_getpass() can at least be stubbed
 854                                 * on other platforms with a different implementation if/when necessary.
 855                                 */
 856                                if (!user_name)
 857                                        user_name = xstrdup(git_getpass_with_description("Username", description));
 858                                init_curl_http_auth(slot->curl);
 859                                ret = HTTP_REAUTH;
 860                        }
 861                } else {
 862                        if (!curl_errorstr[0])
 863                                strlcpy(curl_errorstr,
 864                                        curl_easy_strerror(results.curl_result),
 865                                        sizeof(curl_errorstr));
 866                        ret = HTTP_ERROR;
 867                }
 868        } else {
 869                error("Unable to start HTTP request for %s", url);
 870                ret = HTTP_START_FAILED;
 871        }
 872
 873        slot->local = NULL;
 874        curl_slist_free_all(headers);
 875        strbuf_release(&buf);
 876
 877        return ret;
 878}
 879
 880static int http_request_reauth(const char *url, void *result, int target,
 881                               int options)
 882{
 883        int ret = http_request(url, result, target, options);
 884        if (ret != HTTP_REAUTH)
 885                return ret;
 886        return http_request(url, result, target, options);
 887}
 888
 889int http_get_strbuf(const char *url, struct strbuf *result, int options)
 890{
 891        return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 892}
 893
 894/*
 895 * Downloads an url and stores the result in the given file.
 896 *
 897 * If a previous interrupted download is detected (i.e. a previous temporary
 898 * file is still around) the download is resumed.
 899 */
 900static int http_get_file(const char *url, const char *filename, int options)
 901{
 902        int ret;
 903        struct strbuf tmpfile = STRBUF_INIT;
 904        FILE *result;
 905
 906        strbuf_addf(&tmpfile, "%s.temp", filename);
 907        result = fopen(tmpfile.buf, "a");
 908        if (! result) {
 909                error("Unable to open local file %s", tmpfile.buf);
 910                ret = HTTP_ERROR;
 911                goto cleanup;
 912        }
 913
 914        ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 915        fclose(result);
 916
 917        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 918                ret = HTTP_ERROR;
 919cleanup:
 920        strbuf_release(&tmpfile);
 921        return ret;
 922}
 923
 924int http_error(const char *url, int ret)
 925{
 926        /* http_request has already handled HTTP_START_FAILED. */
 927        if (ret != HTTP_START_FAILED)
 928                error("%s while accessing %s", curl_errorstr, url);
 929
 930        return ret;
 931}
 932
 933int http_fetch_ref(const char *base, struct ref *ref)
 934{
 935        char *url;
 936        struct strbuf buffer = STRBUF_INIT;
 937        int ret = -1;
 938
 939        url = quote_ref_url(base, ref->name);
 940        if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 941                strbuf_rtrim(&buffer);
 942                if (buffer.len == 40)
 943                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 944                else if (!prefixcmp(buffer.buf, "ref: ")) {
 945                        ref->symref = xstrdup(buffer.buf + 5);
 946                        ret = 0;
 947                }
 948        }
 949
 950        strbuf_release(&buffer);
 951        free(url);
 952        return ret;
 953}
 954
 955/* Helpers for fetching packs */
 956static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 957{
 958        char *url, *tmp;
 959        struct strbuf buf = STRBUF_INIT;
 960
 961        if (http_is_verbose)
 962                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 963
 964        end_url_with_slash(&buf, base_url);
 965        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 966        url = strbuf_detach(&buf, NULL);
 967
 968        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 969        tmp = strbuf_detach(&buf, NULL);
 970
 971        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 972                error("Unable to get pack index %s\n", url);
 973                free(tmp);
 974                tmp = NULL;
 975        }
 976
 977        free(url);
 978        return tmp;
 979}
 980
 981static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 982        unsigned char *sha1, const char *base_url)
 983{
 984        struct packed_git *new_pack;
 985        char *tmp_idx = NULL;
 986        int ret;
 987
 988        if (has_pack_index(sha1)) {
 989                new_pack = parse_pack_index(sha1, NULL);
 990                if (!new_pack)
 991                        return -1; /* parse_pack_index() already issued error message */
 992                goto add_pack;
 993        }
 994
 995        tmp_idx = fetch_pack_index(sha1, base_url);
 996        if (!tmp_idx)
 997                return -1;
 998
 999        new_pack = parse_pack_index(sha1, tmp_idx);
1000        if (!new_pack) {
1001                unlink(tmp_idx);
1002                free(tmp_idx);
1003
1004                return -1; /* parse_pack_index() already issued error message */
1005        }
1006
1007        ret = verify_pack_index(new_pack);
1008        if (!ret) {
1009                close_pack_index(new_pack);
1010                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1011        }
1012        free(tmp_idx);
1013        if (ret)
1014                return -1;
1015
1016add_pack:
1017        new_pack->next = *packs_head;
1018        *packs_head = new_pack;
1019        return 0;
1020}
1021
1022int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1023{
1024        int ret = 0, i = 0;
1025        char *url, *data;
1026        struct strbuf buf = STRBUF_INIT;
1027        unsigned char sha1[20];
1028
1029        end_url_with_slash(&buf, base_url);
1030        strbuf_addstr(&buf, "objects/info/packs");
1031        url = strbuf_detach(&buf, NULL);
1032
1033        ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1034        if (ret != HTTP_OK)
1035                goto cleanup;
1036
1037        data = buf.buf;
1038        while (i < buf.len) {
1039                switch (data[i]) {
1040                case 'P':
1041                        i++;
1042                        if (i + 52 <= buf.len &&
1043                            !prefixcmp(data + i, " pack-") &&
1044                            !prefixcmp(data + i + 46, ".pack\n")) {
1045                                get_sha1_hex(data + i + 6, sha1);
1046                                fetch_and_setup_pack_index(packs_head, sha1,
1047                                                      base_url);
1048                                i += 51;
1049                                break;
1050                        }
1051                default:
1052                        while (i < buf.len && data[i] != '\n')
1053                                i++;
1054                }
1055                i++;
1056        }
1057
1058cleanup:
1059        free(url);
1060        return ret;
1061}
1062
1063void release_http_pack_request(struct http_pack_request *preq)
1064{
1065        if (preq->packfile != NULL) {
1066                fclose(preq->packfile);
1067                preq->packfile = NULL;
1068                preq->slot->local = NULL;
1069        }
1070        if (preq->range_header != NULL) {
1071                curl_slist_free_all(preq->range_header);
1072                preq->range_header = NULL;
1073        }
1074        preq->slot = NULL;
1075        free(preq->url);
1076}
1077
1078int finish_http_pack_request(struct http_pack_request *preq)
1079{
1080        struct packed_git **lst;
1081        struct packed_git *p = preq->target;
1082        char *tmp_idx;
1083        struct child_process ip;
1084        const char *ip_argv[8];
1085
1086        close_pack_index(p);
1087
1088        fclose(preq->packfile);
1089        preq->packfile = NULL;
1090        preq->slot->local = NULL;
1091
1092        lst = preq->lst;
1093        while (*lst != p)
1094                lst = &((*lst)->next);
1095        *lst = (*lst)->next;
1096
1097        tmp_idx = xstrdup(preq->tmpfile);
1098        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1099               ".idx.temp");
1100
1101        ip_argv[0] = "index-pack";
1102        ip_argv[1] = "-o";
1103        ip_argv[2] = tmp_idx;
1104        ip_argv[3] = preq->tmpfile;
1105        ip_argv[4] = NULL;
1106
1107        memset(&ip, 0, sizeof(ip));
1108        ip.argv = ip_argv;
1109        ip.git_cmd = 1;
1110        ip.no_stdin = 1;
1111        ip.no_stdout = 1;
1112
1113        if (run_command(&ip)) {
1114                unlink(preq->tmpfile);
1115                unlink(tmp_idx);
1116                free(tmp_idx);
1117                return -1;
1118        }
1119
1120        unlink(sha1_pack_index_name(p->sha1));
1121
1122        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1123         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1124                free(tmp_idx);
1125                return -1;
1126        }
1127
1128        install_packed_git(p);
1129        free(tmp_idx);
1130        return 0;
1131}
1132
1133struct http_pack_request *new_http_pack_request(
1134        struct packed_git *target, const char *base_url)
1135{
1136        long prev_posn = 0;
1137        char range[RANGE_HEADER_SIZE];
1138        struct strbuf buf = STRBUF_INIT;
1139        struct http_pack_request *preq;
1140
1141        preq = xcalloc(1, sizeof(*preq));
1142        preq->target = target;
1143
1144        end_url_with_slash(&buf, base_url);
1145        strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1146                sha1_to_hex(target->sha1));
1147        preq->url = strbuf_detach(&buf, NULL);
1148
1149        snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1150                sha1_pack_name(target->sha1));
1151        preq->packfile = fopen(preq->tmpfile, "a");
1152        if (!preq->packfile) {
1153                error("Unable to open local file %s for pack",
1154                      preq->tmpfile);
1155                goto abort;
1156        }
1157
1158        preq->slot = get_active_slot();
1159        preq->slot->local = preq->packfile;
1160        curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1161        curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1162        curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1163        curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1164                no_pragma_header);
1165
1166        /*
1167         * If there is data present from a previous transfer attempt,
1168         * resume where it left off
1169         */
1170        prev_posn = ftell(preq->packfile);
1171        if (prev_posn>0) {
1172                if (http_is_verbose)
1173                        fprintf(stderr,
1174                                "Resuming fetch of pack %s at byte %ld\n",
1175                                sha1_to_hex(target->sha1), prev_posn);
1176                sprintf(range, "Range: bytes=%ld-", prev_posn);
1177                preq->range_header = curl_slist_append(NULL, range);
1178                curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1179                        preq->range_header);
1180        }
1181
1182        return preq;
1183
1184abort:
1185        free(preq->url);
1186        free(preq);
1187        return NULL;
1188}
1189
1190/* Helpers for fetching objects (loose) */
1191static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1192                               void *data)
1193{
1194        unsigned char expn[4096];
1195        size_t size = eltsize * nmemb;
1196        int posn = 0;
1197        struct http_object_request *freq =
1198                (struct http_object_request *)data;
1199        do {
1200                ssize_t retval = xwrite(freq->localfile,
1201                                        (char *) ptr + posn, size - posn);
1202                if (retval < 0)
1203                        return posn;
1204                posn += retval;
1205        } while (posn < size);
1206
1207        freq->stream.avail_in = size;
1208        freq->stream.next_in = (void *)ptr;
1209        do {
1210                freq->stream.next_out = expn;
1211                freq->stream.avail_out = sizeof(expn);
1212                freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1213                git_SHA1_Update(&freq->c, expn,
1214                                sizeof(expn) - freq->stream.avail_out);
1215        } while (freq->stream.avail_in && freq->zret == Z_OK);
1216        data_received++;
1217        return size;
1218}
1219
1220struct http_object_request *new_http_object_request(const char *base_url,
1221        unsigned char *sha1)
1222{
1223        char *hex = sha1_to_hex(sha1);
1224        char *filename;
1225        char prevfile[PATH_MAX];
1226        int prevlocal;
1227        char prev_buf[PREV_BUF_SIZE];
1228        ssize_t prev_read = 0;
1229        long prev_posn = 0;
1230        char range[RANGE_HEADER_SIZE];
1231        struct curl_slist *range_header = NULL;
1232        struct http_object_request *freq;
1233
1234        freq = xcalloc(1, sizeof(*freq));
1235        hashcpy(freq->sha1, sha1);
1236        freq->localfile = -1;
1237
1238        filename = sha1_file_name(sha1);
1239        snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1240                 "%s.temp", filename);
1241
1242        snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1243        unlink_or_warn(prevfile);
1244        rename(freq->tmpfile, prevfile);
1245        unlink_or_warn(freq->tmpfile);
1246
1247        if (freq->localfile != -1)
1248                error("fd leakage in start: %d", freq->localfile);
1249        freq->localfile = open(freq->tmpfile,
1250                               O_WRONLY | O_CREAT | O_EXCL, 0666);
1251        /*
1252         * This could have failed due to the "lazy directory creation";
1253         * try to mkdir the last path component.
1254         */
1255        if (freq->localfile < 0 && errno == ENOENT) {
1256                char *dir = strrchr(freq->tmpfile, '/');
1257                if (dir) {
1258                        *dir = 0;
1259                        mkdir(freq->tmpfile, 0777);
1260                        *dir = '/';
1261                }
1262                freq->localfile = open(freq->tmpfile,
1263                                       O_WRONLY | O_CREAT | O_EXCL, 0666);
1264        }
1265
1266        if (freq->localfile < 0) {
1267                error("Couldn't create temporary file %s: %s",
1268                      freq->tmpfile, strerror(errno));
1269                goto abort;
1270        }
1271
1272        git_inflate_init(&freq->stream);
1273
1274        git_SHA1_Init(&freq->c);
1275
1276        freq->url = get_remote_object_url(base_url, hex, 0);
1277
1278        /*
1279         * If a previous temp file is present, process what was already
1280         * fetched.
1281         */
1282        prevlocal = open(prevfile, O_RDONLY);
1283        if (prevlocal != -1) {
1284                do {
1285                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1286                        if (prev_read>0) {
1287                                if (fwrite_sha1_file(prev_buf,
1288                                                     1,
1289                                                     prev_read,
1290                                                     freq) == prev_read) {
1291                                        prev_posn += prev_read;
1292                                } else {
1293                                        prev_read = -1;
1294                                }
1295                        }
1296                } while (prev_read > 0);
1297                close(prevlocal);
1298        }
1299        unlink_or_warn(prevfile);
1300
1301        /*
1302         * Reset inflate/SHA1 if there was an error reading the previous temp
1303         * file; also rewind to the beginning of the local file.
1304         */
1305        if (prev_read == -1) {
1306                memset(&freq->stream, 0, sizeof(freq->stream));
1307                git_inflate_init(&freq->stream);
1308                git_SHA1_Init(&freq->c);
1309                if (prev_posn>0) {
1310                        prev_posn = 0;
1311                        lseek(freq->localfile, 0, SEEK_SET);
1312                        if (ftruncate(freq->localfile, 0) < 0) {
1313                                error("Couldn't truncate temporary file %s: %s",
1314                                          freq->tmpfile, strerror(errno));
1315                                goto abort;
1316                        }
1317                }
1318        }
1319
1320        freq->slot = get_active_slot();
1321
1322        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1323        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1324        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1325        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1326        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1327
1328        /*
1329         * If we have successfully processed data from a previous fetch
1330         * attempt, only fetch the data we don't already have.
1331         */
1332        if (prev_posn>0) {
1333                if (http_is_verbose)
1334                        fprintf(stderr,
1335                                "Resuming fetch of object %s at byte %ld\n",
1336                                hex, prev_posn);
1337                sprintf(range, "Range: bytes=%ld-", prev_posn);
1338                range_header = curl_slist_append(range_header, range);
1339                curl_easy_setopt(freq->slot->curl,
1340                                 CURLOPT_HTTPHEADER, range_header);
1341        }
1342
1343        return freq;
1344
1345abort:
1346        free(freq->url);
1347        free(freq);
1348        return NULL;
1349}
1350
1351void process_http_object_request(struct http_object_request *freq)
1352{
1353        if (freq->slot == NULL)
1354                return;
1355        freq->curl_result = freq->slot->curl_result;
1356        freq->http_code = freq->slot->http_code;
1357        freq->slot = NULL;
1358}
1359
1360int finish_http_object_request(struct http_object_request *freq)
1361{
1362        struct stat st;
1363
1364        close(freq->localfile);
1365        freq->localfile = -1;
1366
1367        process_http_object_request(freq);
1368
1369        if (freq->http_code == 416) {
1370                warning("requested range invalid; we may already have all the data.");
1371        } else if (freq->curl_result != CURLE_OK) {
1372                if (stat(freq->tmpfile, &st) == 0)
1373                        if (st.st_size == 0)
1374                                unlink_or_warn(freq->tmpfile);
1375                return -1;
1376        }
1377
1378        git_inflate_end(&freq->stream);
1379        git_SHA1_Final(freq->real_sha1, &freq->c);
1380        if (freq->zret != Z_STREAM_END) {
1381                unlink_or_warn(freq->tmpfile);
1382                return -1;
1383        }
1384        if (hashcmp(freq->sha1, freq->real_sha1)) {
1385                unlink_or_warn(freq->tmpfile);
1386                return -1;
1387        }
1388        freq->rename =
1389                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1390
1391        return freq->rename;
1392}
1393
1394void abort_http_object_request(struct http_object_request *freq)
1395{
1396        unlink_or_warn(freq->tmpfile);
1397
1398        release_http_object_request(freq);
1399}
1400
1401void release_http_object_request(struct http_object_request *freq)
1402{
1403        if (freq->localfile != -1) {
1404                close(freq->localfile);
1405                freq->localfile = -1;
1406        }
1407        if (freq->url != NULL) {
1408                free(freq->url);
1409                freq->url = NULL;
1410        }
1411        if (freq->slot != NULL) {
1412                freq->slot->callback_func = NULL;
1413                freq->slot->callback_data = NULL;
1414                release_active_slot(freq->slot);
1415                freq->slot = NULL;
1416        }
1417}