Andrew's git / gitweb.git / http.c
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http.con commit Merge branch 'js/log-show-children' (aadf863)
   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        init_curl_http_auth(result);
 283
 284        if (ssl_cert != NULL)
 285                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 286        if (has_cert_password())
 287                curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 288#if LIBCURL_VERSION_NUM >= 0x070903
 289        if (ssl_key != NULL)
 290                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 291#endif
 292#if LIBCURL_VERSION_NUM >= 0x070908
 293        if (ssl_capath != NULL)
 294                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 295#endif
 296        if (ssl_cainfo != NULL)
 297                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 298        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 299
 300        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 301                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 302                                 curl_low_speed_limit);
 303                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 304                                 curl_low_speed_time);
 305        }
 306
 307        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 308#if LIBCURL_VERSION_NUM >= 0x071301
 309        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 310#elif LIBCURL_VERSION_NUM >= 0x071101
 311        curl_easy_setopt(result, CURLOPT_POST301, 1);
 312#endif
 313
 314        if (getenv("GIT_CURL_VERBOSE"))
 315                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 316
 317        curl_easy_setopt(result, CURLOPT_USERAGENT,
 318                user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 319
 320        if (curl_ftp_no_epsv)
 321                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 322
 323        if (curl_http_proxy)
 324                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 325
 326        return result;
 327}
 328
 329static void http_auth_init(const char *url)
 330{
 331        const char *at, *colon, *cp, *slash, *host;
 332
 333        cp = strstr(url, "://");
 334        if (!cp)
 335                return;
 336
 337        /*
 338         * Ok, the URL looks like "proto://something".  Which one?
 339         * "proto://<user>:<pass>@<host>/...",
 340         * "proto://<user>@<host>/...", or just
 341         * "proto://<host>/..."?
 342         */
 343        cp += 3;
 344        at = strchr(cp, '@');
 345        colon = strchr(cp, ':');
 346        slash = strchrnul(cp, '/');
 347        if (!at || slash <= at) {
 348                /* No credentials, but we may have to ask for some later */
 349                host = cp;
 350        }
 351        else if (!colon || at <= colon) {
 352                /* Only username */
 353                user_name = url_decode_mem(cp, at - cp);
 354                user_pass = NULL;
 355                host = at + 1;
 356        } else {
 357                user_name = url_decode_mem(cp, colon - cp);
 358                user_pass = url_decode_mem(colon + 1, at - (colon + 1));
 359                host = at + 1;
 360        }
 361
 362        description = url_decode_mem(host, slash - host);
 363}
 364
 365static void set_from_env(const char **var, const char *envname)
 366{
 367        const char *val = getenv(envname);
 368        if (val)
 369                *var = val;
 370}
 371
 372void http_init(struct remote *remote, const char *url)
 373{
 374        char *low_speed_limit;
 375        char *low_speed_time;
 376
 377        http_is_verbose = 0;
 378
 379        git_config(http_options, NULL);
 380
 381        curl_global_init(CURL_GLOBAL_ALL);
 382
 383        if (remote && remote->http_proxy)
 384                curl_http_proxy = xstrdup(remote->http_proxy);
 385
 386        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 387        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 388
 389#ifdef USE_CURL_MULTI
 390        {
 391                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 392                if (http_max_requests != NULL)
 393                        max_requests = atoi(http_max_requests);
 394        }
 395
 396        curlm = curl_multi_init();
 397        if (curlm == NULL) {
 398                fprintf(stderr, "Error creating curl multi handle.\n");
 399                exit(1);
 400        }
 401#endif
 402
 403        if (getenv("GIT_SSL_NO_VERIFY"))
 404                curl_ssl_verify = 0;
 405
 406        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 407#if LIBCURL_VERSION_NUM >= 0x070903
 408        set_from_env(&ssl_key, "GIT_SSL_KEY");
 409#endif
 410#if LIBCURL_VERSION_NUM >= 0x070908
 411        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 412#endif
 413        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 414
 415        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 416
 417        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 418        if (low_speed_limit != NULL)
 419                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 420        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 421        if (low_speed_time != NULL)
 422                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 423
 424        if (curl_ssl_verify == -1)
 425                curl_ssl_verify = 1;
 426
 427        curl_session_count = 0;
 428#ifdef USE_CURL_MULTI
 429        if (max_requests < 1)
 430                max_requests = DEFAULT_MAX_REQUESTS;
 431#endif
 432
 433        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 434                curl_ftp_no_epsv = 1;
 435
 436        if (url) {
 437                http_auth_init(url);
 438                if (!ssl_cert_password_required &&
 439                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 440                    !prefixcmp(url, "https://"))
 441                        ssl_cert_password_required = 1;
 442        }
 443
 444#ifndef NO_CURL_EASY_DUPHANDLE
 445        curl_default = get_curl_handle();
 446#endif
 447}
 448
 449void http_cleanup(void)
 450{
 451        struct active_request_slot *slot = active_queue_head;
 452
 453        while (slot != NULL) {
 454                struct active_request_slot *next = slot->next;
 455                if (slot->curl != NULL) {
 456#ifdef USE_CURL_MULTI
 457                        curl_multi_remove_handle(curlm, slot->curl);
 458#endif
 459                        curl_easy_cleanup(slot->curl);
 460                }
 461                free(slot);
 462                slot = next;
 463        }
 464        active_queue_head = NULL;
 465
 466#ifndef NO_CURL_EASY_DUPHANDLE
 467        curl_easy_cleanup(curl_default);
 468#endif
 469
 470#ifdef USE_CURL_MULTI
 471        curl_multi_cleanup(curlm);
 472#endif
 473        curl_global_cleanup();
 474
 475        curl_slist_free_all(pragma_header);
 476        pragma_header = NULL;
 477
 478        curl_slist_free_all(no_pragma_header);
 479        no_pragma_header = NULL;
 480
 481        if (curl_http_proxy) {
 482                free((void *)curl_http_proxy);
 483                curl_http_proxy = NULL;
 484        }
 485
 486        if (ssl_cert_password != NULL) {
 487                memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 488                free(ssl_cert_password);
 489                ssl_cert_password = NULL;
 490        }
 491        ssl_cert_password_required = 0;
 492}
 493
 494struct active_request_slot *get_active_slot(void)
 495{
 496        struct active_request_slot *slot = active_queue_head;
 497        struct active_request_slot *newslot;
 498
 499#ifdef USE_CURL_MULTI
 500        int num_transfers;
 501
 502        /* Wait for a slot to open up if the queue is full */
 503        while (active_requests >= max_requests) {
 504                curl_multi_perform(curlm, &num_transfers);
 505                if (num_transfers < active_requests)
 506                        process_curl_messages();
 507        }
 508#endif
 509
 510        while (slot != NULL && slot->in_use)
 511                slot = slot->next;
 512
 513        if (slot == NULL) {
 514                newslot = xmalloc(sizeof(*newslot));
 515                newslot->curl = NULL;
 516                newslot->in_use = 0;
 517                newslot->next = NULL;
 518
 519                slot = active_queue_head;
 520                if (slot == NULL) {
 521                        active_queue_head = newslot;
 522                } else {
 523                        while (slot->next != NULL)
 524                                slot = slot->next;
 525                        slot->next = newslot;
 526                }
 527                slot = newslot;
 528        }
 529
 530        if (slot->curl == NULL) {
 531#ifdef NO_CURL_EASY_DUPHANDLE
 532                slot->curl = get_curl_handle();
 533#else
 534                slot->curl = curl_easy_duphandle(curl_default);
 535#endif
 536                curl_session_count++;
 537        }
 538
 539        active_requests++;
 540        slot->in_use = 1;
 541        slot->local = NULL;
 542        slot->results = NULL;
 543        slot->finished = NULL;
 544        slot->callback_data = NULL;
 545        slot->callback_func = NULL;
 546        curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 547        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 548        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 549        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 550        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 551        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 552        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 553        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 554        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 555
 556        return slot;
 557}
 558
 559int start_active_slot(struct active_request_slot *slot)
 560{
 561#ifdef USE_CURL_MULTI
 562        CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 563        int num_transfers;
 564
 565        if (curlm_result != CURLM_OK &&
 566            curlm_result != CURLM_CALL_MULTI_PERFORM) {
 567                active_requests--;
 568                slot->in_use = 0;
 569                return 0;
 570        }
 571
 572        /*
 573         * We know there must be something to do, since we just added
 574         * something.
 575         */
 576        curl_multi_perform(curlm, &num_transfers);
 577#endif
 578        return 1;
 579}
 580
 581#ifdef USE_CURL_MULTI
 582struct fill_chain {
 583        void *data;
 584        int (*fill)(void *);
 585        struct fill_chain *next;
 586};
 587
 588static struct fill_chain *fill_cfg;
 589
 590void add_fill_function(void *data, int (*fill)(void *))
 591{
 592        struct fill_chain *new = xmalloc(sizeof(*new));
 593        struct fill_chain **linkp = &fill_cfg;
 594        new->data = data;
 595        new->fill = fill;
 596        new->next = NULL;
 597        while (*linkp)
 598                linkp = &(*linkp)->next;
 599        *linkp = new;
 600}
 601
 602void fill_active_slots(void)
 603{
 604        struct active_request_slot *slot = active_queue_head;
 605
 606        while (active_requests < max_requests) {
 607                struct fill_chain *fill;
 608                for (fill = fill_cfg; fill; fill = fill->next)
 609                        if (fill->fill(fill->data))
 610                                break;
 611
 612                if (!fill)
 613                        break;
 614        }
 615
 616        while (slot != NULL) {
 617                if (!slot->in_use && slot->curl != NULL
 618                        && curl_session_count > min_curl_sessions) {
 619                        curl_easy_cleanup(slot->curl);
 620                        slot->curl = NULL;
 621                        curl_session_count--;
 622                }
 623                slot = slot->next;
 624        }
 625}
 626
 627void step_active_slots(void)
 628{
 629        int num_transfers;
 630        CURLMcode curlm_result;
 631
 632        do {
 633                curlm_result = curl_multi_perform(curlm, &num_transfers);
 634        } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 635        if (num_transfers < active_requests) {
 636                process_curl_messages();
 637                fill_active_slots();
 638        }
 639}
 640#endif
 641
 642void run_active_slot(struct active_request_slot *slot)
 643{
 644#ifdef USE_CURL_MULTI
 645        long last_pos = 0;
 646        long current_pos;
 647        fd_set readfds;
 648        fd_set writefds;
 649        fd_set excfds;
 650        int max_fd;
 651        struct timeval select_timeout;
 652        int finished = 0;
 653
 654        slot->finished = &finished;
 655        while (!finished) {
 656                data_received = 0;
 657                step_active_slots();
 658
 659                if (!data_received && slot->local != NULL) {
 660                        current_pos = ftell(slot->local);
 661                        if (current_pos > last_pos)
 662                                data_received++;
 663                        last_pos = current_pos;
 664                }
 665
 666                if (slot->in_use && !data_received) {
 667                        max_fd = 0;
 668                        FD_ZERO(&readfds);
 669                        FD_ZERO(&writefds);
 670                        FD_ZERO(&excfds);
 671                        select_timeout.tv_sec = 0;
 672                        select_timeout.tv_usec = 50000;
 673                        select(max_fd, &readfds, &writefds,
 674                               &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 inline int hex(int v)
 753{
 754        if (v < 10)
 755                return '0' + v;
 756        else
 757                return 'A' + v - 10;
 758}
 759
 760static char *quote_ref_url(const char *base, const char *ref)
 761{
 762        struct strbuf buf = STRBUF_INIT;
 763        const char *cp;
 764        int ch;
 765
 766        end_url_with_slash(&buf, base);
 767
 768        for (cp = ref; (ch = *cp) != 0; cp++)
 769                if (needs_quote(ch))
 770                        strbuf_addf(&buf, "%%%02x", ch);
 771                else
 772                        strbuf_addch(&buf, *cp);
 773
 774        return strbuf_detach(&buf, NULL);
 775}
 776
 777void append_remote_object_url(struct strbuf *buf, const char *url,
 778                              const char *hex,
 779                              int only_two_digit_prefix)
 780{
 781        end_url_with_slash(buf, url);
 782
 783        strbuf_addf(buf, "objects/%.*s/", 2, hex);
 784        if (!only_two_digit_prefix)
 785                strbuf_addf(buf, "%s", hex+2);
 786}
 787
 788char *get_remote_object_url(const char *url, const char *hex,
 789                            int only_two_digit_prefix)
 790{
 791        struct strbuf buf = STRBUF_INIT;
 792        append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 793        return strbuf_detach(&buf, NULL);
 794}
 795
 796/* http_request() targets */
 797#define HTTP_REQUEST_STRBUF     0
 798#define HTTP_REQUEST_FILE       1
 799
 800static int http_request(const char *url, void *result, int target, int options)
 801{
 802        struct active_request_slot *slot;
 803        struct slot_results results;
 804        struct curl_slist *headers = NULL;
 805        struct strbuf buf = STRBUF_INIT;
 806        int ret;
 807
 808        slot = get_active_slot();
 809        slot->results = &results;
 810        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 811
 812        if (result == NULL) {
 813                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 814        } else {
 815                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 816                curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 817
 818                if (target == HTTP_REQUEST_FILE) {
 819                        long posn = ftell(result);
 820                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 821                                         fwrite);
 822                        if (posn > 0) {
 823                                strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 824                                headers = curl_slist_append(headers, buf.buf);
 825                                strbuf_reset(&buf);
 826                        }
 827                        slot->local = result;
 828                } else
 829                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 830                                         fwrite_buffer);
 831        }
 832
 833        strbuf_addstr(&buf, "Pragma:");
 834        if (options & HTTP_NO_CACHE)
 835                strbuf_addstr(&buf, " no-cache");
 836
 837        headers = curl_slist_append(headers, buf.buf);
 838
 839        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 840        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 841
 842        if (start_active_slot(slot)) {
 843                run_active_slot(slot);
 844                if (results.curl_result == CURLE_OK)
 845                        ret = HTTP_OK;
 846                else if (missing_target(&results))
 847                        ret = HTTP_MISSING_TARGET;
 848                else if (results.http_code == 401) {
 849                        if (user_name) {
 850                                ret = HTTP_NOAUTH;
 851                        } else {
 852                                /*
 853                                 * git_getpass is needed here because its very likely stdin/stdout are
 854                                 * pipes to our parent process.  So we instead need to use /dev/tty,
 855                                 * but that is non-portable.  Using git_getpass() can at least be stubbed
 856                                 * on other platforms with a different implementation if/when necessary.
 857                                 */
 858                                user_name = xstrdup(git_getpass_with_description("Username", description));
 859                                init_curl_http_auth(slot->curl);
 860                                ret = HTTP_REAUTH;
 861                        }
 862                } else {
 863                        if (!curl_errorstr[0])
 864                                strlcpy(curl_errorstr,
 865                                        curl_easy_strerror(results.curl_result),
 866                                        sizeof(curl_errorstr));
 867                        ret = HTTP_ERROR;
 868                }
 869        } else {
 870                error("Unable to start HTTP request for %s", url);
 871                ret = HTTP_START_FAILED;
 872        }
 873
 874        slot->local = NULL;
 875        curl_slist_free_all(headers);
 876        strbuf_release(&buf);
 877
 878        return ret;
 879}
 880
 881static int http_request_reauth(const char *url, void *result, int target,
 882                               int options)
 883{
 884        int ret = http_request(url, result, target, options);
 885        if (ret != HTTP_REAUTH)
 886                return ret;
 887        return http_request(url, result, target, options);
 888}
 889
 890int http_get_strbuf(const char *url, struct strbuf *result, int options)
 891{
 892        return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 893}
 894
 895/*
 896 * Downloads an url and stores the result in the given file.
 897 *
 898 * If a previous interrupted download is detected (i.e. a previous temporary
 899 * file is still around) the download is resumed.
 900 */
 901static int http_get_file(const char *url, const char *filename, int options)
 902{
 903        int ret;
 904        struct strbuf tmpfile = STRBUF_INIT;
 905        FILE *result;
 906
 907        strbuf_addf(&tmpfile, "%s.temp", filename);
 908        result = fopen(tmpfile.buf, "a");
 909        if (! result) {
 910                error("Unable to open local file %s", tmpfile.buf);
 911                ret = HTTP_ERROR;
 912                goto cleanup;
 913        }
 914
 915        ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 916        fclose(result);
 917
 918        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 919                ret = HTTP_ERROR;
 920cleanup:
 921        strbuf_release(&tmpfile);
 922        return ret;
 923}
 924
 925int http_error(const char *url, int ret)
 926{
 927        /* http_request has already handled HTTP_START_FAILED. */
 928        if (ret != HTTP_START_FAILED)
 929                error("%s while accessing %s", curl_errorstr, url);
 930
 931        return ret;
 932}
 933
 934int http_fetch_ref(const char *base, struct ref *ref)
 935{
 936        char *url;
 937        struct strbuf buffer = STRBUF_INIT;
 938        int ret = -1;
 939
 940        url = quote_ref_url(base, ref->name);
 941        if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 942                strbuf_rtrim(&buffer);
 943                if (buffer.len == 40)
 944                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 945                else if (!prefixcmp(buffer.buf, "ref: ")) {
 946                        ref->symref = xstrdup(buffer.buf + 5);
 947                        ret = 0;
 948                }
 949        }
 950
 951        strbuf_release(&buffer);
 952        free(url);
 953        return ret;
 954}
 955
 956/* Helpers for fetching packs */
 957static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 958{
 959        char *url, *tmp;
 960        struct strbuf buf = STRBUF_INIT;
 961
 962        if (http_is_verbose)
 963                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 964
 965        end_url_with_slash(&buf, base_url);
 966        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 967        url = strbuf_detach(&buf, NULL);
 968
 969        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 970        tmp = strbuf_detach(&buf, NULL);
 971
 972        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 973                error("Unable to get pack index %s\n", url);
 974                free(tmp);
 975                tmp = NULL;
 976        }
 977
 978        free(url);
 979        return tmp;
 980}
 981
 982static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 983        unsigned char *sha1, const char *base_url)
 984{
 985        struct packed_git *new_pack;
 986        char *tmp_idx = NULL;
 987        int ret;
 988
 989        if (has_pack_index(sha1)) {
 990                new_pack = parse_pack_index(sha1, NULL);
 991                if (!new_pack)
 992                        return -1; /* parse_pack_index() already issued error message */
 993                goto add_pack;
 994        }
 995
 996        tmp_idx = fetch_pack_index(sha1, base_url);
 997        if (!tmp_idx)
 998                return -1;
 999
1000        new_pack = parse_pack_index(sha1, tmp_idx);
1001        if (!new_pack) {
1002                unlink(tmp_idx);
1003                free(tmp_idx);
1004
1005                return -1; /* parse_pack_index() already issued error message */
1006        }
1007
1008        ret = verify_pack_index(new_pack);
1009        if (!ret) {
1010                close_pack_index(new_pack);
1011                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1012        }
1013        free(tmp_idx);
1014        if (ret)
1015                return -1;
1016
1017add_pack:
1018        new_pack->next = *packs_head;
1019        *packs_head = new_pack;
1020        return 0;
1021}
1022
1023int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1024{
1025        int ret = 0, i = 0;
1026        char *url, *data;
1027        struct strbuf buf = STRBUF_INIT;
1028        unsigned char sha1[20];
1029
1030        end_url_with_slash(&buf, base_url);
1031        strbuf_addstr(&buf, "objects/info/packs");
1032        url = strbuf_detach(&buf, NULL);
1033
1034        ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1035        if (ret != HTTP_OK)
1036                goto cleanup;
1037
1038        data = buf.buf;
1039        while (i < buf.len) {
1040                switch (data[i]) {
1041                case 'P':
1042                        i++;
1043                        if (i + 52 <= buf.len &&
1044                            !prefixcmp(data + i, " pack-") &&
1045                            !prefixcmp(data + i + 46, ".pack\n")) {
1046                                get_sha1_hex(data + i + 6, sha1);
1047                                fetch_and_setup_pack_index(packs_head, sha1,
1048                                                      base_url);
1049                                i += 51;
1050                                break;
1051                        }
1052                default:
1053                        while (i < buf.len && data[i] != '\n')
1054                                i++;
1055                }
1056                i++;
1057        }
1058
1059cleanup:
1060        free(url);
1061        return ret;
1062}
1063
1064void release_http_pack_request(struct http_pack_request *preq)
1065{
1066        if (preq->packfile != NULL) {
1067                fclose(preq->packfile);
1068                preq->packfile = NULL;
1069                preq->slot->local = NULL;
1070        }
1071        if (preq->range_header != NULL) {
1072                curl_slist_free_all(preq->range_header);
1073                preq->range_header = NULL;
1074        }
1075        preq->slot = NULL;
1076        free(preq->url);
1077}
1078
1079int finish_http_pack_request(struct http_pack_request *preq)
1080{
1081        struct packed_git **lst;
1082        struct packed_git *p = preq->target;
1083        char *tmp_idx;
1084        struct child_process ip;
1085        const char *ip_argv[8];
1086
1087        close_pack_index(p);
1088
1089        fclose(preq->packfile);
1090        preq->packfile = NULL;
1091        preq->slot->local = NULL;
1092
1093        lst = preq->lst;
1094        while (*lst != p)
1095                lst = &((*lst)->next);
1096        *lst = (*lst)->next;
1097
1098        tmp_idx = xstrdup(preq->tmpfile);
1099        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1100               ".idx.temp");
1101
1102        ip_argv[0] = "index-pack";
1103        ip_argv[1] = "-o";
1104        ip_argv[2] = tmp_idx;
1105        ip_argv[3] = preq->tmpfile;
1106        ip_argv[4] = NULL;
1107
1108        memset(&ip, 0, sizeof(ip));
1109        ip.argv = ip_argv;
1110        ip.git_cmd = 1;
1111        ip.no_stdin = 1;
1112        ip.no_stdout = 1;
1113
1114        if (run_command(&ip)) {
1115                unlink(preq->tmpfile);
1116                unlink(tmp_idx);
1117                free(tmp_idx);
1118                return -1;
1119        }
1120
1121        unlink(sha1_pack_index_name(p->sha1));
1122
1123        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1124         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1125                free(tmp_idx);
1126                return -1;
1127        }
1128
1129        install_packed_git(p);
1130        free(tmp_idx);
1131        return 0;
1132}
1133
1134struct http_pack_request *new_http_pack_request(
1135        struct packed_git *target, const char *base_url)
1136{
1137        long prev_posn = 0;
1138        char range[RANGE_HEADER_SIZE];
1139        struct strbuf buf = STRBUF_INIT;
1140        struct http_pack_request *preq;
1141
1142        preq = xcalloc(1, sizeof(*preq));
1143        preq->target = target;
1144
1145        end_url_with_slash(&buf, base_url);
1146        strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1147                sha1_to_hex(target->sha1));
1148        preq->url = strbuf_detach(&buf, NULL);
1149
1150        snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1151                sha1_pack_name(target->sha1));
1152        preq->packfile = fopen(preq->tmpfile, "a");
1153        if (!preq->packfile) {
1154                error("Unable to open local file %s for pack",
1155                      preq->tmpfile);
1156                goto abort;
1157        }
1158
1159        preq->slot = get_active_slot();
1160        preq->slot->local = preq->packfile;
1161        curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1162        curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1163        curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1164        curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1165                no_pragma_header);
1166
1167        /*
1168         * If there is data present from a previous transfer attempt,
1169         * resume where it left off
1170         */
1171        prev_posn = ftell(preq->packfile);
1172        if (prev_posn>0) {
1173                if (http_is_verbose)
1174                        fprintf(stderr,
1175                                "Resuming fetch of pack %s at byte %ld\n",
1176                                sha1_to_hex(target->sha1), prev_posn);
1177                sprintf(range, "Range: bytes=%ld-", prev_posn);
1178                preq->range_header = curl_slist_append(NULL, range);
1179                curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1180                        preq->range_header);
1181        }
1182
1183        return preq;
1184
1185abort:
1186        free(preq->url);
1187        free(preq);
1188        return NULL;
1189}
1190
1191/* Helpers for fetching objects (loose) */
1192static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1193                               void *data)
1194{
1195        unsigned char expn[4096];
1196        size_t size = eltsize * nmemb;
1197        int posn = 0;
1198        struct http_object_request *freq =
1199                (struct http_object_request *)data;
1200        do {
1201                ssize_t retval = xwrite(freq->localfile,
1202                                        (char *) ptr + posn, size - posn);
1203                if (retval < 0)
1204                        return posn;
1205                posn += retval;
1206        } while (posn < size);
1207
1208        freq->stream.avail_in = size;
1209        freq->stream.next_in = (void *)ptr;
1210        do {
1211                freq->stream.next_out = expn;
1212                freq->stream.avail_out = sizeof(expn);
1213                freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1214                git_SHA1_Update(&freq->c, expn,
1215                                sizeof(expn) - freq->stream.avail_out);
1216        } while (freq->stream.avail_in && freq->zret == Z_OK);
1217        data_received++;
1218        return size;
1219}
1220
1221struct http_object_request *new_http_object_request(const char *base_url,
1222        unsigned char *sha1)
1223{
1224        char *hex = sha1_to_hex(sha1);
1225        char *filename;
1226        char prevfile[PATH_MAX];
1227        int prevlocal;
1228        char prev_buf[PREV_BUF_SIZE];
1229        ssize_t prev_read = 0;
1230        long prev_posn = 0;
1231        char range[RANGE_HEADER_SIZE];
1232        struct curl_slist *range_header = NULL;
1233        struct http_object_request *freq;
1234
1235        freq = xcalloc(1, sizeof(*freq));
1236        hashcpy(freq->sha1, sha1);
1237        freq->localfile = -1;
1238
1239        filename = sha1_file_name(sha1);
1240        snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1241                 "%s.temp", filename);
1242
1243        snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1244        unlink_or_warn(prevfile);
1245        rename(freq->tmpfile, prevfile);
1246        unlink_or_warn(freq->tmpfile);
1247
1248        if (freq->localfile != -1)
1249                error("fd leakage in start: %d", freq->localfile);
1250        freq->localfile = open(freq->tmpfile,
1251                               O_WRONLY | O_CREAT | O_EXCL, 0666);
1252        /*
1253         * This could have failed due to the "lazy directory creation";
1254         * try to mkdir the last path component.
1255         */
1256        if (freq->localfile < 0 && errno == ENOENT) {
1257                char *dir = strrchr(freq->tmpfile, '/');
1258                if (dir) {
1259                        *dir = 0;
1260                        mkdir(freq->tmpfile, 0777);
1261                        *dir = '/';
1262                }
1263                freq->localfile = open(freq->tmpfile,
1264                                       O_WRONLY | O_CREAT | O_EXCL, 0666);
1265        }
1266
1267        if (freq->localfile < 0) {
1268                error("Couldn't create temporary file %s: %s",
1269                      freq->tmpfile, strerror(errno));
1270                goto abort;
1271        }
1272
1273        git_inflate_init(&freq->stream);
1274
1275        git_SHA1_Init(&freq->c);
1276
1277        freq->url = get_remote_object_url(base_url, hex, 0);
1278
1279        /*
1280         * If a previous temp file is present, process what was already
1281         * fetched.
1282         */
1283        prevlocal = open(prevfile, O_RDONLY);
1284        if (prevlocal != -1) {
1285                do {
1286                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1287                        if (prev_read>0) {
1288                                if (fwrite_sha1_file(prev_buf,
1289                                                     1,
1290                                                     prev_read,
1291                                                     freq) == prev_read) {
1292                                        prev_posn += prev_read;
1293                                } else {
1294                                        prev_read = -1;
1295                                }
1296                        }
1297                } while (prev_read > 0);
1298                close(prevlocal);
1299        }
1300        unlink_or_warn(prevfile);
1301
1302        /*
1303         * Reset inflate/SHA1 if there was an error reading the previous temp
1304         * file; also rewind to the beginning of the local file.
1305         */
1306        if (prev_read == -1) {
1307                memset(&freq->stream, 0, sizeof(freq->stream));
1308                git_inflate_init(&freq->stream);
1309                git_SHA1_Init(&freq->c);
1310                if (prev_posn>0) {
1311                        prev_posn = 0;
1312                        lseek(freq->localfile, 0, SEEK_SET);
1313                        if (ftruncate(freq->localfile, 0) < 0) {
1314                                error("Couldn't truncate temporary file %s: %s",
1315                                          freq->tmpfile, strerror(errno));
1316                                goto abort;
1317                        }
1318                }
1319        }
1320
1321        freq->slot = get_active_slot();
1322
1323        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1324        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1325        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1326        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1327        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1328
1329        /*
1330         * If we have successfully processed data from a previous fetch
1331         * attempt, only fetch the data we don't already have.
1332         */
1333        if (prev_posn>0) {
1334                if (http_is_verbose)
1335                        fprintf(stderr,
1336                                "Resuming fetch of object %s at byte %ld\n",
1337                                hex, prev_posn);
1338                sprintf(range, "Range: bytes=%ld-", prev_posn);
1339                range_header = curl_slist_append(range_header, range);
1340                curl_easy_setopt(freq->slot->curl,
1341                                 CURLOPT_HTTPHEADER, range_header);
1342        }
1343
1344        return freq;
1345
1346abort:
1347        free(freq->url);
1348        free(freq);
1349        return NULL;
1350}
1351
1352void process_http_object_request(struct http_object_request *freq)
1353{
1354        if (freq->slot == NULL)
1355                return;
1356        freq->curl_result = freq->slot->curl_result;
1357        freq->http_code = freq->slot->http_code;
1358        freq->slot = NULL;
1359}
1360
1361int finish_http_object_request(struct http_object_request *freq)
1362{
1363        struct stat st;
1364
1365        close(freq->localfile);
1366        freq->localfile = -1;
1367
1368        process_http_object_request(freq);
1369
1370        if (freq->http_code == 416) {
1371                warning("requested range invalid; we may already have all the data.");
1372        } else if (freq->curl_result != CURLE_OK) {
1373                if (stat(freq->tmpfile, &st) == 0)
1374                        if (st.st_size == 0)
1375                                unlink_or_warn(freq->tmpfile);
1376                return -1;
1377        }
1378
1379        git_inflate_end(&freq->stream);
1380        git_SHA1_Final(freq->real_sha1, &freq->c);
1381        if (freq->zret != Z_STREAM_END) {
1382                unlink_or_warn(freq->tmpfile);
1383                return -1;
1384        }
1385        if (hashcmp(freq->sha1, freq->real_sha1)) {
1386                unlink_or_warn(freq->tmpfile);
1387                return -1;
1388        }
1389        freq->rename =
1390                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1391
1392        return freq->rename;
1393}
1394
1395void abort_http_object_request(struct http_object_request *freq)
1396{
1397        unlink_or_warn(freq->tmpfile);
1398
1399        release_http_object_request(freq);
1400}
1401
1402void release_http_object_request(struct http_object_request *freq)
1403{
1404        if (freq->localfile != -1) {
1405                close(freq->localfile);
1406                freq->localfile = -1;
1407        }
1408        if (freq->url != NULL) {
1409                free(freq->url);
1410                freq->url = NULL;
1411        }
1412        if (freq->slot != NULL) {
1413                freq->slot->callback_func = NULL;
1414                freq->slot->callback_data = NULL;
1415                release_active_slot(freq->slot);
1416                freq->slot = NULL;
1417        }
1418}