Andrew's git / gitweb.git / http.c
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http.con commit t9200: On MSYS, do not pass Windows-style paths to CVS (4397c65)
   1#include "http.h"
   2#include "pack.h"
   3#include "sideband.h"
   4#include "run-command.h"
   5#include "url.h"
   6
   7int active_requests;
   8int http_is_verbose;
   9size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  10
  11#if LIBCURL_VERSION_NUM >= 0x070a06
  12#define LIBCURL_CAN_HANDLE_AUTH_ANY
  13#endif
  14
  15static int min_curl_sessions = 1;
  16static int curl_session_count;
  17#ifdef USE_CURL_MULTI
  18static int max_requests = -1;
  19static CURLM *curlm;
  20#endif
  21#ifndef NO_CURL_EASY_DUPHANDLE
  22static CURL *curl_default;
  23#endif
  24
  25#define PREV_BUF_SIZE 4096
  26#define RANGE_HEADER_SIZE 30
  27
  28char curl_errorstr[CURL_ERROR_SIZE];
  29
  30static int curl_ssl_verify = -1;
  31static const char *ssl_cert;
  32#if LIBCURL_VERSION_NUM >= 0x070903
  33static const char *ssl_key;
  34#endif
  35#if LIBCURL_VERSION_NUM >= 0x070908
  36static const char *ssl_capath;
  37#endif
  38static const char *ssl_cainfo;
  39static long curl_low_speed_limit = -1;
  40static long curl_low_speed_time = -1;
  41static int curl_ftp_no_epsv;
  42static const char *curl_http_proxy;
  43static const char *curl_cookie_file;
  44static char *user_name, *user_pass, *description;
  45static int http_proactive_auth;
  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        return size;
 103}
 104
 105size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 106{
 107        return eltsize * nmemb;
 108}
 109
 110#ifdef USE_CURL_MULTI
 111static void process_curl_messages(void)
 112{
 113        int num_messages;
 114        struct active_request_slot *slot;
 115        CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 116
 117        while (curl_message != NULL) {
 118                if (curl_message->msg == CURLMSG_DONE) {
 119                        int curl_result = curl_message->data.result;
 120                        slot = active_queue_head;
 121                        while (slot != NULL &&
 122                               slot->curl != curl_message->easy_handle)
 123                                slot = slot->next;
 124                        if (slot != NULL) {
 125                                curl_multi_remove_handle(curlm, slot->curl);
 126                                slot->curl_result = curl_result;
 127                                finish_active_slot(slot);
 128                        } else {
 129                                fprintf(stderr, "Received DONE message for unknown request!\n");
 130                        }
 131                } else {
 132                        fprintf(stderr, "Unknown CURL message received: %d\n",
 133                                (int)curl_message->msg);
 134                }
 135                curl_message = curl_multi_info_read(curlm, &num_messages);
 136        }
 137}
 138#endif
 139
 140static char *git_getpass_with_description(const char *what, const char *desc)
 141{
 142        struct strbuf prompt = STRBUF_INIT;
 143        char *r;
 144
 145        if (desc)
 146                strbuf_addf(&prompt, "%s for '%s': ", what, desc);
 147        else
 148                strbuf_addf(&prompt, "%s: ", what);
 149        /*
 150         * NEEDSWORK: for usernames, we should do something less magical that
 151         * actually echoes the characters. However, we need to read from
 152         * /dev/tty and not stdio, which is not portable (but getpass will do
 153         * it for us). http.c uses the same workaround.
 154         */
 155        r = git_getpass(prompt.buf);
 156
 157        strbuf_release(&prompt);
 158        return xstrdup(r);
 159}
 160
 161static int http_options(const char *var, const char *value, void *cb)
 162{
 163        if (!strcmp("http.sslverify", var)) {
 164                curl_ssl_verify = git_config_bool(var, value);
 165                return 0;
 166        }
 167        if (!strcmp("http.sslcert", var))
 168                return git_config_string(&ssl_cert, var, value);
 169#if LIBCURL_VERSION_NUM >= 0x070903
 170        if (!strcmp("http.sslkey", var))
 171                return git_config_string(&ssl_key, var, value);
 172#endif
 173#if LIBCURL_VERSION_NUM >= 0x070908
 174        if (!strcmp("http.sslcapath", var))
 175                return git_config_string(&ssl_capath, var, value);
 176#endif
 177        if (!strcmp("http.sslcainfo", var))
 178                return git_config_string(&ssl_cainfo, var, value);
 179        if (!strcmp("http.sslcertpasswordprotected", var)) {
 180                if (git_config_bool(var, value))
 181                        ssl_cert_password_required = 1;
 182                return 0;
 183        }
 184        if (!strcmp("http.minsessions", var)) {
 185                min_curl_sessions = git_config_int(var, value);
 186#ifndef USE_CURL_MULTI
 187                if (min_curl_sessions > 1)
 188                        min_curl_sessions = 1;
 189#endif
 190                return 0;
 191        }
 192#ifdef USE_CURL_MULTI
 193        if (!strcmp("http.maxrequests", var)) {
 194                max_requests = git_config_int(var, value);
 195                return 0;
 196        }
 197#endif
 198        if (!strcmp("http.lowspeedlimit", var)) {
 199                curl_low_speed_limit = (long)git_config_int(var, value);
 200                return 0;
 201        }
 202        if (!strcmp("http.lowspeedtime", var)) {
 203                curl_low_speed_time = (long)git_config_int(var, value);
 204                return 0;
 205        }
 206
 207        if (!strcmp("http.noepsv", var)) {
 208                curl_ftp_no_epsv = git_config_bool(var, value);
 209                return 0;
 210        }
 211        if (!strcmp("http.proxy", var))
 212                return git_config_string(&curl_http_proxy, var, value);
 213
 214        if (!strcmp("http.cookiefile", var))
 215                return git_config_string(&curl_cookie_file, var, value);
 216
 217        if (!strcmp("http.postbuffer", var)) {
 218                http_post_buffer = git_config_int(var, value);
 219                if (http_post_buffer < LARGE_PACKET_MAX)
 220                        http_post_buffer = LARGE_PACKET_MAX;
 221                return 0;
 222        }
 223
 224        if (!strcmp("http.useragent", var))
 225                return git_config_string(&user_agent, var, value);
 226
 227        /* Fall back on the default ones */
 228        return git_default_config(var, value, cb);
 229}
 230
 231static void init_curl_http_auth(CURL *result)
 232{
 233        if (user_name) {
 234                struct strbuf up = STRBUF_INIT;
 235                if (!user_pass)
 236                        user_pass = xstrdup(git_getpass_with_description("Password", description));
 237                strbuf_addf(&up, "%s:%s", user_name, user_pass);
 238                curl_easy_setopt(result, CURLOPT_USERPWD,
 239                                 strbuf_detach(&up, NULL));
 240        }
 241}
 242
 243static int has_cert_password(void)
 244{
 245        if (ssl_cert_password != NULL)
 246                return 1;
 247        if (ssl_cert == NULL || ssl_cert_password_required != 1)
 248                return 0;
 249        /* Only prompt the user once. */
 250        ssl_cert_password_required = -1;
 251        ssl_cert_password = git_getpass_with_description("Certificate Password", description);
 252        if (ssl_cert_password != NULL) {
 253                ssl_cert_password = xstrdup(ssl_cert_password);
 254                return 1;
 255        } else
 256                return 0;
 257}
 258
 259static CURL *get_curl_handle(void)
 260{
 261        CURL *result = curl_easy_init();
 262
 263        if (!curl_ssl_verify) {
 264                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 265                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 266        } else {
 267                /* Verify authenticity of the peer's certificate */
 268                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 269                /* The name in the cert must match whom we tried to connect */
 270                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 271        }
 272
 273#if LIBCURL_VERSION_NUM >= 0x070907
 274        curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 275#endif
 276#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 277        curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 278#endif
 279
 280        if (http_proactive_auth)
 281                init_curl_http_auth(result);
 282
 283        if (ssl_cert != NULL)
 284                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 285        if (has_cert_password())
 286                curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 287#if LIBCURL_VERSION_NUM >= 0x070903
 288        if (ssl_key != NULL)
 289                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 290#endif
 291#if LIBCURL_VERSION_NUM >= 0x070908
 292        if (ssl_capath != NULL)
 293                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 294#endif
 295        if (ssl_cainfo != NULL)
 296                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 297        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 298
 299        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 300                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 301                                 curl_low_speed_limit);
 302                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 303                                 curl_low_speed_time);
 304        }
 305
 306        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 307#if LIBCURL_VERSION_NUM >= 0x071301
 308        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 309#elif LIBCURL_VERSION_NUM >= 0x071101
 310        curl_easy_setopt(result, CURLOPT_POST301, 1);
 311#endif
 312
 313        if (getenv("GIT_CURL_VERBOSE"))
 314                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 315
 316        curl_easy_setopt(result, CURLOPT_USERAGENT,
 317                user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 318
 319        if (curl_ftp_no_epsv)
 320                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 321
 322        if (curl_http_proxy)
 323                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 324
 325        return result;
 326}
 327
 328static void http_auth_init(const char *url)
 329{
 330        const char *at, *colon, *cp, *slash, *host;
 331
 332        cp = strstr(url, "://");
 333        if (!cp)
 334                return;
 335
 336        /*
 337         * Ok, the URL looks like "proto://something".  Which one?
 338         * "proto://<user>:<pass>@<host>/...",
 339         * "proto://<user>@<host>/...", or just
 340         * "proto://<host>/..."?
 341         */
 342        cp += 3;
 343        at = strchr(cp, '@');
 344        colon = strchr(cp, ':');
 345        slash = strchrnul(cp, '/');
 346        if (!at || slash <= at) {
 347                /* No credentials, but we may have to ask for some later */
 348                host = cp;
 349        }
 350        else if (!colon || at <= colon) {
 351                /* Only username */
 352                user_name = url_decode_mem(cp, at - cp);
 353                user_pass = NULL;
 354                host = at + 1;
 355        } else {
 356                user_name = url_decode_mem(cp, colon - cp);
 357                user_pass = url_decode_mem(colon + 1, at - (colon + 1));
 358                host = at + 1;
 359        }
 360
 361        description = url_decode_mem(host, slash - host);
 362}
 363
 364static void set_from_env(const char **var, const char *envname)
 365{
 366        const char *val = getenv(envname);
 367        if (val)
 368                *var = val;
 369}
 370
 371void http_init(struct remote *remote, const char *url, int proactive_auth)
 372{
 373        char *low_speed_limit;
 374        char *low_speed_time;
 375
 376        http_is_verbose = 0;
 377
 378        git_config(http_options, NULL);
 379
 380        curl_global_init(CURL_GLOBAL_ALL);
 381
 382        http_proactive_auth = proactive_auth;
 383
 384        if (remote && remote->http_proxy)
 385                curl_http_proxy = xstrdup(remote->http_proxy);
 386
 387        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 388        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 389
 390#ifdef USE_CURL_MULTI
 391        {
 392                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 393                if (http_max_requests != NULL)
 394                        max_requests = atoi(http_max_requests);
 395        }
 396
 397        curlm = curl_multi_init();
 398        if (curlm == NULL) {
 399                fprintf(stderr, "Error creating curl multi handle.\n");
 400                exit(1);
 401        }
 402#endif
 403
 404        if (getenv("GIT_SSL_NO_VERIFY"))
 405                curl_ssl_verify = 0;
 406
 407        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 408#if LIBCURL_VERSION_NUM >= 0x070903
 409        set_from_env(&ssl_key, "GIT_SSL_KEY");
 410#endif
 411#if LIBCURL_VERSION_NUM >= 0x070908
 412        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 413#endif
 414        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 415
 416        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 417
 418        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 419        if (low_speed_limit != NULL)
 420                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 421        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 422        if (low_speed_time != NULL)
 423                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 424
 425        if (curl_ssl_verify == -1)
 426                curl_ssl_verify = 1;
 427
 428        curl_session_count = 0;
 429#ifdef USE_CURL_MULTI
 430        if (max_requests < 1)
 431                max_requests = DEFAULT_MAX_REQUESTS;
 432#endif
 433
 434        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 435                curl_ftp_no_epsv = 1;
 436
 437        if (url) {
 438                http_auth_init(url);
 439                if (!ssl_cert_password_required &&
 440                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 441                    !prefixcmp(url, "https://"))
 442                        ssl_cert_password_required = 1;
 443        }
 444
 445#ifndef NO_CURL_EASY_DUPHANDLE
 446        curl_default = get_curl_handle();
 447#endif
 448}
 449
 450void http_cleanup(void)
 451{
 452        struct active_request_slot *slot = active_queue_head;
 453
 454        while (slot != NULL) {
 455                struct active_request_slot *next = slot->next;
 456                if (slot->curl != NULL) {
 457#ifdef USE_CURL_MULTI
 458                        curl_multi_remove_handle(curlm, slot->curl);
 459#endif
 460                        curl_easy_cleanup(slot->curl);
 461                }
 462                free(slot);
 463                slot = next;
 464        }
 465        active_queue_head = NULL;
 466
 467#ifndef NO_CURL_EASY_DUPHANDLE
 468        curl_easy_cleanup(curl_default);
 469#endif
 470
 471#ifdef USE_CURL_MULTI
 472        curl_multi_cleanup(curlm);
 473#endif
 474        curl_global_cleanup();
 475
 476        curl_slist_free_all(pragma_header);
 477        pragma_header = NULL;
 478
 479        curl_slist_free_all(no_pragma_header);
 480        no_pragma_header = NULL;
 481
 482        if (curl_http_proxy) {
 483                free((void *)curl_http_proxy);
 484                curl_http_proxy = NULL;
 485        }
 486
 487        if (ssl_cert_password != NULL) {
 488                memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 489                free(ssl_cert_password);
 490                ssl_cert_password = NULL;
 491        }
 492        ssl_cert_password_required = 0;
 493}
 494
 495struct active_request_slot *get_active_slot(void)
 496{
 497        struct active_request_slot *slot = active_queue_head;
 498        struct active_request_slot *newslot;
 499
 500#ifdef USE_CURL_MULTI
 501        int num_transfers;
 502
 503        /* Wait for a slot to open up if the queue is full */
 504        while (active_requests >= max_requests) {
 505                curl_multi_perform(curlm, &num_transfers);
 506                if (num_transfers < active_requests)
 507                        process_curl_messages();
 508        }
 509#endif
 510
 511        while (slot != NULL && slot->in_use)
 512                slot = slot->next;
 513
 514        if (slot == NULL) {
 515                newslot = xmalloc(sizeof(*newslot));
 516                newslot->curl = NULL;
 517                newslot->in_use = 0;
 518                newslot->next = NULL;
 519
 520                slot = active_queue_head;
 521                if (slot == NULL) {
 522                        active_queue_head = newslot;
 523                } else {
 524                        while (slot->next != NULL)
 525                                slot = slot->next;
 526                        slot->next = newslot;
 527                }
 528                slot = newslot;
 529        }
 530
 531        if (slot->curl == NULL) {
 532#ifdef NO_CURL_EASY_DUPHANDLE
 533                slot->curl = get_curl_handle();
 534#else
 535                slot->curl = curl_easy_duphandle(curl_default);
 536#endif
 537                curl_session_count++;
 538        }
 539
 540        active_requests++;
 541        slot->in_use = 1;
 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        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                step_active_slots();
 655
 656                if (slot->in_use) {
 657#if LIBCURL_VERSION_NUM >= 0x070f04
 658                        long curl_timeout;
 659                        curl_multi_timeout(curlm, &curl_timeout);
 660                        if (curl_timeout == 0) {
 661                                continue;
 662                        } else if (curl_timeout == -1) {
 663                                select_timeout.tv_sec  = 0;
 664                                select_timeout.tv_usec = 50000;
 665                        } else {
 666                                select_timeout.tv_sec  =  curl_timeout / 1000;
 667                                select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 668                        }
 669#else
 670                        select_timeout.tv_sec  = 0;
 671                        select_timeout.tv_usec = 50000;
 672#endif
 673
 674                        max_fd = -1;
 675                        FD_ZERO(&readfds);
 676                        FD_ZERO(&writefds);
 677                        FD_ZERO(&excfds);
 678                        curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 679
 680                        select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 681                }
 682        }
 683#else
 684        while (slot->in_use) {
 685                slot->curl_result = curl_easy_perform(slot->curl);
 686                finish_active_slot(slot);
 687        }
 688#endif
 689}
 690
 691static void closedown_active_slot(struct active_request_slot *slot)
 692{
 693        active_requests--;
 694        slot->in_use = 0;
 695}
 696
 697static void release_active_slot(struct active_request_slot *slot)
 698{
 699        closedown_active_slot(slot);
 700        if (slot->curl && curl_session_count > min_curl_sessions) {
 701#ifdef USE_CURL_MULTI
 702                curl_multi_remove_handle(curlm, slot->curl);
 703#endif
 704                curl_easy_cleanup(slot->curl);
 705                slot->curl = NULL;
 706                curl_session_count--;
 707        }
 708#ifdef USE_CURL_MULTI
 709        fill_active_slots();
 710#endif
 711}
 712
 713void finish_active_slot(struct active_request_slot *slot)
 714{
 715        closedown_active_slot(slot);
 716        curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 717
 718        if (slot->finished != NULL)
 719                (*slot->finished) = 1;
 720
 721        /* Store slot results so they can be read after the slot is reused */
 722        if (slot->results != NULL) {
 723                slot->results->curl_result = slot->curl_result;
 724                slot->results->http_code = slot->http_code;
 725        }
 726
 727        /* Run callback if appropriate */
 728        if (slot->callback_func != NULL)
 729                slot->callback_func(slot->callback_data);
 730}
 731
 732void finish_all_active_slots(void)
 733{
 734        struct active_request_slot *slot = active_queue_head;
 735
 736        while (slot != NULL)
 737                if (slot->in_use) {
 738                        run_active_slot(slot);
 739                        slot = active_queue_head;
 740                } else {
 741                        slot = slot->next;
 742                }
 743}
 744
 745/* Helpers for modifying and creating URLs */
 746static inline int needs_quote(int ch)
 747{
 748        if (((ch >= 'A') && (ch <= 'Z'))
 749                        || ((ch >= 'a') && (ch <= 'z'))
 750                        || ((ch >= '0') && (ch <= '9'))
 751                        || (ch == '/')
 752                        || (ch == '-')
 753                        || (ch == '.'))
 754                return 0;
 755        return 1;
 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                } else
 826                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 827                                         fwrite_buffer);
 828        }
 829
 830        strbuf_addstr(&buf, "Pragma:");
 831        if (options & HTTP_NO_CACHE)
 832                strbuf_addstr(&buf, " no-cache");
 833
 834        headers = curl_slist_append(headers, buf.buf);
 835
 836        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 837        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 838
 839        if (start_active_slot(slot)) {
 840                run_active_slot(slot);
 841                if (results.curl_result == CURLE_OK)
 842                        ret = HTTP_OK;
 843                else if (missing_target(&results))
 844                        ret = HTTP_MISSING_TARGET;
 845                else if (results.http_code == 401) {
 846                        if (user_name && user_pass) {
 847                                ret = HTTP_NOAUTH;
 848                        } else {
 849                                /*
 850                                 * git_getpass is needed here because its very likely stdin/stdout are
 851                                 * pipes to our parent process.  So we instead need to use /dev/tty,
 852                                 * but that is non-portable.  Using git_getpass() can at least be stubbed
 853                                 * on other platforms with a different implementation if/when necessary.
 854                                 */
 855                                if (!user_name)
 856                                        user_name = xstrdup(git_getpass_with_description("Username", description));
 857                                init_curl_http_auth(slot->curl);
 858                                ret = HTTP_REAUTH;
 859                        }
 860                } else {
 861                        if (!curl_errorstr[0])
 862                                strlcpy(curl_errorstr,
 863                                        curl_easy_strerror(results.curl_result),
 864                                        sizeof(curl_errorstr));
 865                        ret = HTTP_ERROR;
 866                }
 867        } else {
 868                error("Unable to start HTTP request for %s", url);
 869                ret = HTTP_START_FAILED;
 870        }
 871
 872        curl_slist_free_all(headers);
 873        strbuf_release(&buf);
 874
 875        return ret;
 876}
 877
 878static int http_request_reauth(const char *url, void *result, int target,
 879                               int options)
 880{
 881        int ret = http_request(url, result, target, options);
 882        if (ret != HTTP_REAUTH)
 883                return ret;
 884        return http_request(url, result, target, options);
 885}
 886
 887int http_get_strbuf(const char *url, struct strbuf *result, int options)
 888{
 889        return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
 890}
 891
 892/*
 893 * Downloads an url and stores the result in the given file.
 894 *
 895 * If a previous interrupted download is detected (i.e. a previous temporary
 896 * file is still around) the download is resumed.
 897 */
 898static int http_get_file(const char *url, const char *filename, int options)
 899{
 900        int ret;
 901        struct strbuf tmpfile = STRBUF_INIT;
 902        FILE *result;
 903
 904        strbuf_addf(&tmpfile, "%s.temp", filename);
 905        result = fopen(tmpfile.buf, "a");
 906        if (! result) {
 907                error("Unable to open local file %s", tmpfile.buf);
 908                ret = HTTP_ERROR;
 909                goto cleanup;
 910        }
 911
 912        ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
 913        fclose(result);
 914
 915        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 916                ret = HTTP_ERROR;
 917cleanup:
 918        strbuf_release(&tmpfile);
 919        return ret;
 920}
 921
 922int http_error(const char *url, int ret)
 923{
 924        /* http_request has already handled HTTP_START_FAILED. */
 925        if (ret != HTTP_START_FAILED)
 926                error("%s while accessing %s", curl_errorstr, url);
 927
 928        return ret;
 929}
 930
 931int http_fetch_ref(const char *base, struct ref *ref)
 932{
 933        char *url;
 934        struct strbuf buffer = STRBUF_INIT;
 935        int ret = -1;
 936
 937        url = quote_ref_url(base, ref->name);
 938        if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 939                strbuf_rtrim(&buffer);
 940                if (buffer.len == 40)
 941                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 942                else if (!prefixcmp(buffer.buf, "ref: ")) {
 943                        ref->symref = xstrdup(buffer.buf + 5);
 944                        ret = 0;
 945                }
 946        }
 947
 948        strbuf_release(&buffer);
 949        free(url);
 950        return ret;
 951}
 952
 953/* Helpers for fetching packs */
 954static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 955{
 956        char *url, *tmp;
 957        struct strbuf buf = STRBUF_INIT;
 958
 959        if (http_is_verbose)
 960                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 961
 962        end_url_with_slash(&buf, base_url);
 963        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 964        url = strbuf_detach(&buf, NULL);
 965
 966        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 967        tmp = strbuf_detach(&buf, NULL);
 968
 969        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 970                error("Unable to get pack index %s\n", url);
 971                free(tmp);
 972                tmp = NULL;
 973        }
 974
 975        free(url);
 976        return tmp;
 977}
 978
 979static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 980        unsigned char *sha1, const char *base_url)
 981{
 982        struct packed_git *new_pack;
 983        char *tmp_idx = NULL;
 984        int ret;
 985
 986        if (has_pack_index(sha1)) {
 987                new_pack = parse_pack_index(sha1, NULL);
 988                if (!new_pack)
 989                        return -1; /* parse_pack_index() already issued error message */
 990                goto add_pack;
 991        }
 992
 993        tmp_idx = fetch_pack_index(sha1, base_url);
 994        if (!tmp_idx)
 995                return -1;
 996
 997        new_pack = parse_pack_index(sha1, tmp_idx);
 998        if (!new_pack) {
 999                unlink(tmp_idx);
1000                free(tmp_idx);
1001
1002                return -1; /* parse_pack_index() already issued error message */
1003        }
1004
1005        ret = verify_pack_index(new_pack);
1006        if (!ret) {
1007                close_pack_index(new_pack);
1008                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1009        }
1010        free(tmp_idx);
1011        if (ret)
1012                return -1;
1013
1014add_pack:
1015        new_pack->next = *packs_head;
1016        *packs_head = new_pack;
1017        return 0;
1018}
1019
1020int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1021{
1022        int ret = 0, i = 0;
1023        char *url, *data;
1024        struct strbuf buf = STRBUF_INIT;
1025        unsigned char sha1[20];
1026
1027        end_url_with_slash(&buf, base_url);
1028        strbuf_addstr(&buf, "objects/info/packs");
1029        url = strbuf_detach(&buf, NULL);
1030
1031        ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1032        if (ret != HTTP_OK)
1033                goto cleanup;
1034
1035        data = buf.buf;
1036        while (i < buf.len) {
1037                switch (data[i]) {
1038                case 'P':
1039                        i++;
1040                        if (i + 52 <= buf.len &&
1041                            !prefixcmp(data + i, " pack-") &&
1042                            !prefixcmp(data + i + 46, ".pack\n")) {
1043                                get_sha1_hex(data + i + 6, sha1);
1044                                fetch_and_setup_pack_index(packs_head, sha1,
1045                                                      base_url);
1046                                i += 51;
1047                                break;
1048                        }
1049                default:
1050                        while (i < buf.len && data[i] != '\n')
1051                                i++;
1052                }
1053                i++;
1054        }
1055
1056cleanup:
1057        free(url);
1058        return ret;
1059}
1060
1061void release_http_pack_request(struct http_pack_request *preq)
1062{
1063        if (preq->packfile != NULL) {
1064                fclose(preq->packfile);
1065                preq->packfile = NULL;
1066        }
1067        if (preq->range_header != NULL) {
1068                curl_slist_free_all(preq->range_header);
1069                preq->range_header = NULL;
1070        }
1071        preq->slot = NULL;
1072        free(preq->url);
1073}
1074
1075int finish_http_pack_request(struct http_pack_request *preq)
1076{
1077        struct packed_git **lst;
1078        struct packed_git *p = preq->target;
1079        char *tmp_idx;
1080        struct child_process ip;
1081        const char *ip_argv[8];
1082
1083        close_pack_index(p);
1084
1085        fclose(preq->packfile);
1086        preq->packfile = NULL;
1087
1088        lst = preq->lst;
1089        while (*lst != p)
1090                lst = &((*lst)->next);
1091        *lst = (*lst)->next;
1092
1093        tmp_idx = xstrdup(preq->tmpfile);
1094        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1095               ".idx.temp");
1096
1097        ip_argv[0] = "index-pack";
1098        ip_argv[1] = "-o";
1099        ip_argv[2] = tmp_idx;
1100        ip_argv[3] = preq->tmpfile;
1101        ip_argv[4] = NULL;
1102
1103        memset(&ip, 0, sizeof(ip));
1104        ip.argv = ip_argv;
1105        ip.git_cmd = 1;
1106        ip.no_stdin = 1;
1107        ip.no_stdout = 1;
1108
1109        if (run_command(&ip)) {
1110                unlink(preq->tmpfile);
1111                unlink(tmp_idx);
1112                free(tmp_idx);
1113                return -1;
1114        }
1115
1116        unlink(sha1_pack_index_name(p->sha1));
1117
1118        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1119         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1120                free(tmp_idx);
1121                return -1;
1122        }
1123
1124        install_packed_git(p);
1125        free(tmp_idx);
1126        return 0;
1127}
1128
1129struct http_pack_request *new_http_pack_request(
1130        struct packed_git *target, const char *base_url)
1131{
1132        long prev_posn = 0;
1133        char range[RANGE_HEADER_SIZE];
1134        struct strbuf buf = STRBUF_INIT;
1135        struct http_pack_request *preq;
1136
1137        preq = xcalloc(1, sizeof(*preq));
1138        preq->target = target;
1139
1140        end_url_with_slash(&buf, base_url);
1141        strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1142                sha1_to_hex(target->sha1));
1143        preq->url = strbuf_detach(&buf, NULL);
1144
1145        snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1146                sha1_pack_name(target->sha1));
1147        preq->packfile = fopen(preq->tmpfile, "a");
1148        if (!preq->packfile) {
1149                error("Unable to open local file %s for pack",
1150                      preq->tmpfile);
1151                goto abort;
1152        }
1153
1154        preq->slot = get_active_slot();
1155        curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1156        curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1157        curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1158        curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1159                no_pragma_header);
1160
1161        /*
1162         * If there is data present from a previous transfer attempt,
1163         * resume where it left off
1164         */
1165        prev_posn = ftell(preq->packfile);
1166        if (prev_posn>0) {
1167                if (http_is_verbose)
1168                        fprintf(stderr,
1169                                "Resuming fetch of pack %s at byte %ld\n",
1170                                sha1_to_hex(target->sha1), prev_posn);
1171                sprintf(range, "Range: bytes=%ld-", prev_posn);
1172                preq->range_header = curl_slist_append(NULL, range);
1173                curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1174                        preq->range_header);
1175        }
1176
1177        return preq;
1178
1179abort:
1180        free(preq->url);
1181        free(preq);
1182        return NULL;
1183}
1184
1185/* Helpers for fetching objects (loose) */
1186static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1187                               void *data)
1188{
1189        unsigned char expn[4096];
1190        size_t size = eltsize * nmemb;
1191        int posn = 0;
1192        struct http_object_request *freq =
1193                (struct http_object_request *)data;
1194        do {
1195                ssize_t retval = xwrite(freq->localfile,
1196                                        (char *) ptr + posn, size - posn);
1197                if (retval < 0)
1198                        return posn;
1199                posn += retval;
1200        } while (posn < size);
1201
1202        freq->stream.avail_in = size;
1203        freq->stream.next_in = (void *)ptr;
1204        do {
1205                freq->stream.next_out = expn;
1206                freq->stream.avail_out = sizeof(expn);
1207                freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1208                git_SHA1_Update(&freq->c, expn,
1209                                sizeof(expn) - freq->stream.avail_out);
1210        } while (freq->stream.avail_in && freq->zret == Z_OK);
1211        return size;
1212}
1213
1214struct http_object_request *new_http_object_request(const char *base_url,
1215        unsigned char *sha1)
1216{
1217        char *hex = sha1_to_hex(sha1);
1218        char *filename;
1219        char prevfile[PATH_MAX];
1220        int prevlocal;
1221        char prev_buf[PREV_BUF_SIZE];
1222        ssize_t prev_read = 0;
1223        long prev_posn = 0;
1224        char range[RANGE_HEADER_SIZE];
1225        struct curl_slist *range_header = NULL;
1226        struct http_object_request *freq;
1227
1228        freq = xcalloc(1, sizeof(*freq));
1229        hashcpy(freq->sha1, sha1);
1230        freq->localfile = -1;
1231
1232        filename = sha1_file_name(sha1);
1233        snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1234                 "%s.temp", filename);
1235
1236        snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1237        unlink_or_warn(prevfile);
1238        rename(freq->tmpfile, prevfile);
1239        unlink_or_warn(freq->tmpfile);
1240
1241        if (freq->localfile != -1)
1242                error("fd leakage in start: %d", freq->localfile);
1243        freq->localfile = open(freq->tmpfile,
1244                               O_WRONLY | O_CREAT | O_EXCL, 0666);
1245        /*
1246         * This could have failed due to the "lazy directory creation";
1247         * try to mkdir the last path component.
1248         */
1249        if (freq->localfile < 0 && errno == ENOENT) {
1250                char *dir = strrchr(freq->tmpfile, '/');
1251                if (dir) {
1252                        *dir = 0;
1253                        mkdir(freq->tmpfile, 0777);
1254                        *dir = '/';
1255                }
1256                freq->localfile = open(freq->tmpfile,
1257                                       O_WRONLY | O_CREAT | O_EXCL, 0666);
1258        }
1259
1260        if (freq->localfile < 0) {
1261                error("Couldn't create temporary file %s: %s",
1262                      freq->tmpfile, strerror(errno));
1263                goto abort;
1264        }
1265
1266        git_inflate_init(&freq->stream);
1267
1268        git_SHA1_Init(&freq->c);
1269
1270        freq->url = get_remote_object_url(base_url, hex, 0);
1271
1272        /*
1273         * If a previous temp file is present, process what was already
1274         * fetched.
1275         */
1276        prevlocal = open(prevfile, O_RDONLY);
1277        if (prevlocal != -1) {
1278                do {
1279                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1280                        if (prev_read>0) {
1281                                if (fwrite_sha1_file(prev_buf,
1282                                                     1,
1283                                                     prev_read,
1284                                                     freq) == prev_read) {
1285                                        prev_posn += prev_read;
1286                                } else {
1287                                        prev_read = -1;
1288                                }
1289                        }
1290                } while (prev_read > 0);
1291                close(prevlocal);
1292        }
1293        unlink_or_warn(prevfile);
1294
1295        /*
1296         * Reset inflate/SHA1 if there was an error reading the previous temp
1297         * file; also rewind to the beginning of the local file.
1298         */
1299        if (prev_read == -1) {
1300                memset(&freq->stream, 0, sizeof(freq->stream));
1301                git_inflate_init(&freq->stream);
1302                git_SHA1_Init(&freq->c);
1303                if (prev_posn>0) {
1304                        prev_posn = 0;
1305                        lseek(freq->localfile, 0, SEEK_SET);
1306                        if (ftruncate(freq->localfile, 0) < 0) {
1307                                error("Couldn't truncate temporary file %s: %s",
1308                                          freq->tmpfile, strerror(errno));
1309                                goto abort;
1310                        }
1311                }
1312        }
1313
1314        freq->slot = get_active_slot();
1315
1316        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1317        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1318        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1319        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1320        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1321
1322        /*
1323         * If we have successfully processed data from a previous fetch
1324         * attempt, only fetch the data we don't already have.
1325         */
1326        if (prev_posn>0) {
1327                if (http_is_verbose)
1328                        fprintf(stderr,
1329                                "Resuming fetch of object %s at byte %ld\n",
1330                                hex, prev_posn);
1331                sprintf(range, "Range: bytes=%ld-", prev_posn);
1332                range_header = curl_slist_append(range_header, range);
1333                curl_easy_setopt(freq->slot->curl,
1334                                 CURLOPT_HTTPHEADER, range_header);
1335        }
1336
1337        return freq;
1338
1339abort:
1340        free(freq->url);
1341        free(freq);
1342        return NULL;
1343}
1344
1345void process_http_object_request(struct http_object_request *freq)
1346{
1347        if (freq->slot == NULL)
1348                return;
1349        freq->curl_result = freq->slot->curl_result;
1350        freq->http_code = freq->slot->http_code;
1351        freq->slot = NULL;
1352}
1353
1354int finish_http_object_request(struct http_object_request *freq)
1355{
1356        struct stat st;
1357
1358        close(freq->localfile);
1359        freq->localfile = -1;
1360
1361        process_http_object_request(freq);
1362
1363        if (freq->http_code == 416) {
1364                warning("requested range invalid; we may already have all the data.");
1365        } else if (freq->curl_result != CURLE_OK) {
1366                if (stat(freq->tmpfile, &st) == 0)
1367                        if (st.st_size == 0)
1368                                unlink_or_warn(freq->tmpfile);
1369                return -1;
1370        }
1371
1372        git_inflate_end(&freq->stream);
1373        git_SHA1_Final(freq->real_sha1, &freq->c);
1374        if (freq->zret != Z_STREAM_END) {
1375                unlink_or_warn(freq->tmpfile);
1376                return -1;
1377        }
1378        if (hashcmp(freq->sha1, freq->real_sha1)) {
1379                unlink_or_warn(freq->tmpfile);
1380                return -1;
1381        }
1382        freq->rename =
1383                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1384
1385        return freq->rename;
1386}
1387
1388void abort_http_object_request(struct http_object_request *freq)
1389{
1390        unlink_or_warn(freq->tmpfile);
1391
1392        release_http_object_request(freq);
1393}
1394
1395void release_http_object_request(struct http_object_request *freq)
1396{
1397        if (freq->localfile != -1) {
1398                close(freq->localfile);
1399                freq->localfile = -1;
1400        }
1401        if (freq->url != NULL) {
1402                free(freq->url);
1403                freq->url = NULL;
1404        }
1405        if (freq->slot != NULL) {
1406                freq->slot->callback_func = NULL;
1407                freq->slot->callback_data = NULL;
1408                release_active_slot(freq->slot);
1409                freq->slot = NULL;
1410        }
1411}