Andrew's git - gitweb.git/blob

a2c1819e22f8fa961e9f6ae04b3f721fb10cbd79
   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 char *user_name, *user_pass;
  45static const char *user_agent;
  46
  47#if LIBCURL_VERSION_NUM >= 0x071700
  48/* Use CURLOPT_KEYPASSWD as is */
  49#elif LIBCURL_VERSION_NUM >= 0x070903
  50#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  51#else
  52#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  53#endif
  54
  55static char *ssl_cert_password;
  56static int ssl_cert_password_required;
  57
  58static struct curl_slist *pragma_header;
  59static struct curl_slist *no_pragma_header;
  60
  61static struct active_request_slot *active_queue_head;
  62
  63size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  64{
  65        size_t size = eltsize * nmemb;
  66        struct buffer *buffer = buffer_;
  67
  68        if (size > buffer->buf.len - buffer->posn)
  69                size = buffer->buf.len - buffer->posn;
  70        memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  71        buffer->posn += size;
  72
  73        return size;
  74}
  75
  76#ifndef NO_CURL_IOCTL
  77curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  78{
  79        struct buffer *buffer = clientp;
  80
  81        switch (cmd) {
  82        case CURLIOCMD_NOP:
  83                return CURLIOE_OK;
  84
  85        case CURLIOCMD_RESTARTREAD:
  86                buffer->posn = 0;
  87                return CURLIOE_OK;
  88
  89        default:
  90                return CURLIOE_UNKNOWNCMD;
  91        }
  92}
  93#endif
  94
  95size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  96{
  97        size_t size = eltsize * nmemb;
  98        struct strbuf *buffer = buffer_;
  99
 100        strbuf_add(buffer, ptr, size);
 101        data_received++;
 102        return size;
 103}
 104
 105size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 106{
 107        data_received++;
 108        return eltsize * nmemb;
 109}
 110
 111#ifdef USE_CURL_MULTI
 112static void process_curl_messages(void)
 113{
 114        int num_messages;
 115        struct active_request_slot *slot;
 116        CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 117
 118        while (curl_message != NULL) {
 119                if (curl_message->msg == CURLMSG_DONE) {
 120                        int curl_result = curl_message->data.result;
 121                        slot = active_queue_head;
 122                        while (slot != NULL &&
 123                               slot->curl != curl_message->easy_handle)
 124                                slot = slot->next;
 125                        if (slot != NULL) {
 126                                curl_multi_remove_handle(curlm, slot->curl);
 127                                slot->curl_result = curl_result;
 128                                finish_active_slot(slot);
 129                        } else {
 130                                fprintf(stderr, "Received DONE message for unknown request!\n");
 131                        }
 132                } else {
 133                        fprintf(stderr, "Unknown CURL message received: %d\n",
 134                                (int)curl_message->msg);
 135                }
 136                curl_message = curl_multi_info_read(curlm, &num_messages);
 137        }
 138}
 139#endif
 140
 141static int http_options(const char *var, const char *value, void *cb)
 142{
 143        if (!strcmp("http.sslverify", var)) {
 144                curl_ssl_verify = git_config_bool(var, value);
 145                return 0;
 146        }
 147        if (!strcmp("http.sslcert", var))
 148                return git_config_string(&ssl_cert, var, value);
 149#if LIBCURL_VERSION_NUM >= 0x070903
 150        if (!strcmp("http.sslkey", var))
 151                return git_config_string(&ssl_key, var, value);
 152#endif
 153#if LIBCURL_VERSION_NUM >= 0x070908
 154        if (!strcmp("http.sslcapath", var))
 155                return git_config_string(&ssl_capath, var, value);
 156#endif
 157        if (!strcmp("http.sslcainfo", var))
 158                return git_config_string(&ssl_cainfo, var, value);
 159        if (!strcmp("http.sslcertpasswordprotected", var)) {
 160                if (git_config_bool(var, value))
 161                        ssl_cert_password_required = 1;
 162                return 0;
 163        }
 164        if (!strcmp("http.minsessions", var)) {
 165                min_curl_sessions = git_config_int(var, value);
 166#ifndef USE_CURL_MULTI
 167                if (min_curl_sessions > 1)
 168                        min_curl_sessions = 1;
 169#endif
 170                return 0;
 171        }
 172#ifdef USE_CURL_MULTI
 173        if (!strcmp("http.maxrequests", var)) {
 174                max_requests = git_config_int(var, value);
 175                return 0;
 176        }
 177#endif
 178        if (!strcmp("http.lowspeedlimit", var)) {
 179                curl_low_speed_limit = (long)git_config_int(var, value);
 180                return 0;
 181        }
 182        if (!strcmp("http.lowspeedtime", var)) {
 183                curl_low_speed_time = (long)git_config_int(var, value);
 184                return 0;
 185        }
 186
 187        if (!strcmp("http.noepsv", var)) {
 188                curl_ftp_no_epsv = git_config_bool(var, value);
 189                return 0;
 190        }
 191        if (!strcmp("http.proxy", var))
 192                return git_config_string(&curl_http_proxy, var, value);
 193
 194        if (!strcmp("http.postbuffer", var)) {
 195                http_post_buffer = git_config_int(var, value);
 196                if (http_post_buffer < LARGE_PACKET_MAX)
 197                        http_post_buffer = LARGE_PACKET_MAX;
 198                return 0;
 199        }
 200
 201        if (!strcmp("http.useragent", var))
 202                return git_config_string(&user_agent, var, value);
 203
 204        /* Fall back on the default ones */
 205        return git_default_config(var, value, cb);
 206}
 207
 208static void init_curl_http_auth(CURL *result)
 209{
 210        if (user_name) {
 211                struct strbuf up = STRBUF_INIT;
 212                if (!user_pass)
 213                        user_pass = xstrdup(git_getpass("Password: "));
 214                strbuf_addf(&up, "%s:%s", user_name, user_pass);
 215                curl_easy_setopt(result, CURLOPT_USERPWD,
 216                                 strbuf_detach(&up, NULL));
 217        }
 218}
 219
 220static int has_cert_password(void)
 221{
 222        if (ssl_cert_password != NULL)
 223                return 1;
 224        if (ssl_cert == NULL || ssl_cert_password_required != 1)
 225                return 0;
 226        /* Only prompt the user once. */
 227        ssl_cert_password_required = -1;
 228        ssl_cert_password = git_getpass("Certificate Password: ");
 229        if (ssl_cert_password != NULL) {
 230                ssl_cert_password = xstrdup(ssl_cert_password);
 231                return 1;
 232        } else
 233                return 0;
 234}
 235
 236/* curl 7.25.0 has CURLOPT_TCP_KEEPALIVE, too, but we support older curl */
 237static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
 238{
 239        int ka = 1;
 240        int rc;
 241        socklen_t len = (socklen_t)sizeof(ka);
 242
 243        if (type != CURLSOCKTYPE_IPCXN)
 244                return 0;
 245
 246        rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
 247        if (rc < 0)
 248                warning("unable to set SO_KEEPALIVE on socket %s",
 249                        strerror(errno));
 250
 251        return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
 252}
 253
 254static CURL *get_curl_handle(void)
 255{
 256        CURL *result = curl_easy_init();
 257
 258        if (!curl_ssl_verify) {
 259                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 260                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 261        } else {
 262                /* Verify authenticity of the peer's certificate */
 263                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 264                /* The name in the cert must match whom we tried to connect */
 265                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 266        }
 267
 268#if LIBCURL_VERSION_NUM >= 0x070907
 269        curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 270#endif
 271#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 272        curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 273#endif
 274
 275        init_curl_http_auth(result);
 276
 277        if (ssl_cert != NULL)
 278                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 279        if (has_cert_password())
 280                curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password);
 281#if LIBCURL_VERSION_NUM >= 0x070903
 282        if (ssl_key != NULL)
 283                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 284#endif
 285#if LIBCURL_VERSION_NUM >= 0x070908
 286        if (ssl_capath != NULL)
 287                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 288#endif
 289        if (ssl_cainfo != NULL)
 290                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 291        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 292
 293        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 294                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 295                                 curl_low_speed_limit);
 296                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 297                                 curl_low_speed_time);
 298        }
 299
 300        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 301#if LIBCURL_VERSION_NUM >= 0x071301
 302        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 303#elif LIBCURL_VERSION_NUM >= 0x071101
 304        curl_easy_setopt(result, CURLOPT_POST301, 1);
 305#endif
 306
 307        if (getenv("GIT_CURL_VERBOSE"))
 308                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 309
 310        curl_easy_setopt(result, CURLOPT_USERAGENT,
 311                user_agent ? user_agent : GIT_HTTP_USER_AGENT);
 312
 313        if (curl_ftp_no_epsv)
 314                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 315
 316        if (curl_http_proxy)
 317                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 318
 319#if LIBCURL_VERSION_NUM >= 0x071000
 320        curl_easy_setopt(result, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
 321#endif
 322
 323        return result;
 324}
 325
 326static void http_auth_init(const char *url)
 327{
 328        char *at, *colon, *cp, *slash, *decoded;
 329        int len;
 330
 331        cp = strstr(url, "://");
 332        if (!cp)
 333                return;
 334
 335        /*
 336         * Ok, the URL looks like "proto://something".  Which one?
 337         * "proto://<user>:<pass>@<host>/...",
 338         * "proto://<user>@<host>/...", or just
 339         * "proto://<host>/..."?
 340         */
 341        cp += 3;
 342        at = strchr(cp, '@');
 343        colon = strchr(cp, ':');
 344        slash = strchrnul(cp, '/');
 345        if (!at || slash <= at)
 346                return; /* No credentials */
 347        if (!colon || at <= colon) {
 348                /* Only username */
 349                len = at - cp;
 350                user_name = xmalloc(len + 1);
 351                memcpy(user_name, cp, len);
 352                user_name[len] = '\0';
 353                decoded = url_decode(user_name);
 354                free(user_name);
 355                user_name = decoded;
 356                user_pass = NULL;
 357        } else {
 358                len = colon - cp;
 359                user_name = xmalloc(len + 1);
 360                memcpy(user_name, cp, len);
 361                user_name[len] = '\0';
 362                decoded = url_decode(user_name);
 363                free(user_name);
 364                user_name = decoded;
 365                len = at - (colon + 1);
 366                user_pass = xmalloc(len + 1);
 367                memcpy(user_pass, colon + 1, len);
 368                user_pass[len] = '\0';
 369                decoded = url_decode(user_pass);
 370                free(user_pass);
 371                user_pass = decoded;
 372        }
 373}
 374
 375static void set_from_env(const char **var, const char *envname)
 376{
 377        const char *val = getenv(envname);
 378        if (val)
 379                *var = val;
 380}
 381
 382void http_init(struct remote *remote)
 383{
 384        char *low_speed_limit;
 385        char *low_speed_time;
 386
 387        http_is_verbose = 0;
 388
 389        git_config(http_options, NULL);
 390
 391        curl_global_init(CURL_GLOBAL_ALL);
 392
 393        if (remote && remote->http_proxy)
 394                curl_http_proxy = xstrdup(remote->http_proxy);
 395
 396        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 397        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 398
 399#ifdef USE_CURL_MULTI
 400        {
 401                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 402                if (http_max_requests != NULL)
 403                        max_requests = atoi(http_max_requests);
 404        }
 405
 406        curlm = curl_multi_init();
 407        if (curlm == NULL) {
 408                fprintf(stderr, "Error creating curl multi handle.\n");
 409                exit(1);
 410        }
 411#endif
 412
 413        if (getenv("GIT_SSL_NO_VERIFY"))
 414                curl_ssl_verify = 0;
 415
 416        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 417#if LIBCURL_VERSION_NUM >= 0x070903
 418        set_from_env(&ssl_key, "GIT_SSL_KEY");
 419#endif
 420#if LIBCURL_VERSION_NUM >= 0x070908
 421        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 422#endif
 423        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 424
 425        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 426
 427        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 428        if (low_speed_limit != NULL)
 429                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 430        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 431        if (low_speed_time != NULL)
 432                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 433
 434        if (curl_ssl_verify == -1)
 435                curl_ssl_verify = 1;
 436
 437        curl_session_count = 0;
 438#ifdef USE_CURL_MULTI
 439        if (max_requests < 1)
 440                max_requests = DEFAULT_MAX_REQUESTS;
 441#endif
 442
 443        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 444                curl_ftp_no_epsv = 1;
 445
 446        if (remote && remote->url && remote->url[0]) {
 447                http_auth_init(remote->url[0]);
 448                if (!ssl_cert_password_required &&
 449                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 450                    !prefixcmp(remote->url[0], "https://"))
 451                        ssl_cert_password_required = 1;
 452        }
 453
 454#ifndef NO_CURL_EASY_DUPHANDLE
 455        curl_default = get_curl_handle();
 456#endif
 457}
 458
 459void http_cleanup(void)
 460{
 461        struct active_request_slot *slot = active_queue_head;
 462
 463        while (slot != NULL) {
 464                struct active_request_slot *next = slot->next;
 465                if (slot->curl != NULL) {
 466#ifdef USE_CURL_MULTI
 467                        curl_multi_remove_handle(curlm, slot->curl);
 468#endif
 469                        curl_easy_cleanup(slot->curl);
 470                }
 471                free(slot);
 472                slot = next;
 473        }
 474        active_queue_head = NULL;
 475
 476#ifndef NO_CURL_EASY_DUPHANDLE
 477        curl_easy_cleanup(curl_default);
 478#endif
 479
 480#ifdef USE_CURL_MULTI
 481        curl_multi_cleanup(curlm);
 482#endif
 483        curl_global_cleanup();
 484
 485        curl_slist_free_all(pragma_header);
 486        pragma_header = NULL;
 487
 488        curl_slist_free_all(no_pragma_header);
 489        no_pragma_header = NULL;
 490
 491        if (curl_http_proxy) {
 492                free((void *)curl_http_proxy);
 493                curl_http_proxy = NULL;
 494        }
 495
 496        if (ssl_cert_password != NULL) {
 497                memset(ssl_cert_password, 0, strlen(ssl_cert_password));
 498                free(ssl_cert_password);
 499                ssl_cert_password = NULL;
 500        }
 501        ssl_cert_password_required = 0;
 502}
 503
 504struct active_request_slot *get_active_slot(void)
 505{
 506        struct active_request_slot *slot = active_queue_head;
 507        struct active_request_slot *newslot;
 508
 509#ifdef USE_CURL_MULTI
 510        int num_transfers;
 511
 512        /* Wait for a slot to open up if the queue is full */
 513        while (active_requests >= max_requests) {
 514                curl_multi_perform(curlm, &num_transfers);
 515                if (num_transfers < active_requests)
 516                        process_curl_messages();
 517        }
 518#endif
 519
 520        while (slot != NULL && slot->in_use)
 521                slot = slot->next;
 522
 523        if (slot == NULL) {
 524                newslot = xmalloc(sizeof(*newslot));
 525                newslot->curl = NULL;
 526                newslot->in_use = 0;
 527                newslot->next = NULL;
 528
 529                slot = active_queue_head;
 530                if (slot == NULL) {
 531                        active_queue_head = newslot;
 532                } else {
 533                        while (slot->next != NULL)
 534                                slot = slot->next;
 535                        slot->next = newslot;
 536                }
 537                slot = newslot;
 538        }
 539
 540        if (slot->curl == NULL) {
 541#ifdef NO_CURL_EASY_DUPHANDLE
 542                slot->curl = get_curl_handle();
 543#else
 544                slot->curl = curl_easy_duphandle(curl_default);
 545#endif
 546                curl_session_count++;
 547        }
 548
 549        active_requests++;
 550        slot->in_use = 1;
 551        slot->local = NULL;
 552        slot->results = NULL;
 553        slot->finished = NULL;
 554        slot->callback_data = NULL;
 555        slot->callback_func = NULL;
 556        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 557        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 558        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 559        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 560        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 561        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 562        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 563        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 564
 565        return slot;
 566}
 567
 568int start_active_slot(struct active_request_slot *slot)
 569{
 570#ifdef USE_CURL_MULTI
 571        CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 572        int num_transfers;
 573
 574        if (curlm_result != CURLM_OK &&
 575            curlm_result != CURLM_CALL_MULTI_PERFORM) {
 576                active_requests--;
 577                slot->in_use = 0;
 578                return 0;
 579        }
 580
 581        /*
 582         * We know there must be something to do, since we just added
 583         * something.
 584         */
 585        curl_multi_perform(curlm, &num_transfers);
 586#endif
 587        return 1;
 588}
 589
 590#ifdef USE_CURL_MULTI
 591struct fill_chain {
 592        void *data;
 593        int (*fill)(void *);
 594        struct fill_chain *next;
 595};
 596
 597static struct fill_chain *fill_cfg;
 598
 599void add_fill_function(void *data, int (*fill)(void *))
 600{
 601        struct fill_chain *new = xmalloc(sizeof(*new));
 602        struct fill_chain **linkp = &fill_cfg;
 603        new->data = data;
 604        new->fill = fill;
 605        new->next = NULL;
 606        while (*linkp)
 607                linkp = &(*linkp)->next;
 608        *linkp = new;
 609}
 610
 611void fill_active_slots(void)
 612{
 613        struct active_request_slot *slot = active_queue_head;
 614
 615        while (active_requests < max_requests) {
 616                struct fill_chain *fill;
 617                for (fill = fill_cfg; fill; fill = fill->next)
 618                        if (fill->fill(fill->data))
 619                                break;
 620
 621                if (!fill)
 622                        break;
 623        }
 624
 625        while (slot != NULL) {
 626                if (!slot->in_use && slot->curl != NULL
 627                        && curl_session_count > min_curl_sessions) {
 628                        curl_easy_cleanup(slot->curl);
 629                        slot->curl = NULL;
 630                        curl_session_count--;
 631                }
 632                slot = slot->next;
 633        }
 634}
 635
 636void step_active_slots(void)
 637{
 638        int num_transfers;
 639        CURLMcode curlm_result;
 640
 641        do {
 642                curlm_result = curl_multi_perform(curlm, &num_transfers);
 643        } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 644        if (num_transfers < active_requests) {
 645                process_curl_messages();
 646                fill_active_slots();
 647        }
 648}
 649#endif
 650
 651void run_active_slot(struct active_request_slot *slot)
 652{
 653#ifdef USE_CURL_MULTI
 654        long last_pos = 0;
 655        long current_pos;
 656        fd_set readfds;
 657        fd_set writefds;
 658        fd_set excfds;
 659        int max_fd;
 660        struct timeval select_timeout;
 661        int finished = 0;
 662
 663        slot->finished = &finished;
 664        while (!finished) {
 665                data_received = 0;
 666                step_active_slots();
 667
 668                if (!data_received && slot->local != NULL) {
 669                        current_pos = ftell(slot->local);
 670                        if (current_pos > last_pos)
 671                                data_received++;
 672                        last_pos = current_pos;
 673                }
 674
 675                if (slot->in_use && !data_received) {
 676                        max_fd = 0;
 677                        FD_ZERO(&readfds);
 678                        FD_ZERO(&writefds);
 679                        FD_ZERO(&excfds);
 680                        select_timeout.tv_sec = 0;
 681                        select_timeout.tv_usec = 50000;
 682                        select(max_fd, &readfds, &writefds,
 683                               &excfds, &select_timeout);
 684                }
 685        }
 686#else
 687        while (slot->in_use) {
 688                slot->curl_result = curl_easy_perform(slot->curl);
 689                finish_active_slot(slot);
 690        }
 691#endif
 692}
 693
 694static void closedown_active_slot(struct active_request_slot *slot)
 695{
 696        active_requests--;
 697        slot->in_use = 0;
 698}
 699
 700static void release_active_slot(struct active_request_slot *slot)
 701{
 702        closedown_active_slot(slot);
 703        if (slot->curl && curl_session_count > min_curl_sessions) {
 704#ifdef USE_CURL_MULTI
 705                curl_multi_remove_handle(curlm, slot->curl);
 706#endif
 707                curl_easy_cleanup(slot->curl);
 708                slot->curl = NULL;
 709                curl_session_count--;
 710        }
 711#ifdef USE_CURL_MULTI
 712        fill_active_slots();
 713#endif
 714}
 715
 716void finish_active_slot(struct active_request_slot *slot)
 717{
 718        closedown_active_slot(slot);
 719        curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 720
 721        if (slot->finished != NULL)
 722                (*slot->finished) = 1;
 723
 724        /* Store slot results so they can be read after the slot is reused */
 725        if (slot->results != NULL) {
 726                slot->results->curl_result = slot->curl_result;
 727                slot->results->http_code = slot->http_code;
 728        }
 729
 730        /* Run callback if appropriate */
 731        if (slot->callback_func != NULL)
 732                slot->callback_func(slot->callback_data);
 733}
 734
 735void finish_all_active_slots(void)
 736{
 737        struct active_request_slot *slot = active_queue_head;
 738
 739        while (slot != NULL)
 740                if (slot->in_use) {
 741                        run_active_slot(slot);
 742                        slot = active_queue_head;
 743                } else {
 744                        slot = slot->next;
 745                }
 746}
 747
 748/* Helpers for modifying and creating URLs */
 749static inline int needs_quote(int ch)
 750{
 751        if (((ch >= 'A') && (ch <= 'Z'))
 752                        || ((ch >= 'a') && (ch <= 'z'))
 753                        || ((ch >= '0') && (ch <= '9'))
 754                        || (ch == '/')
 755                        || (ch == '-')
 756                        || (ch == '.'))
 757                return 0;
 758        return 1;
 759}
 760
 761static inline int hex(int v)
 762{
 763        if (v < 10)
 764                return '0' + v;
 765        else
 766                return 'A' + v - 10;
 767}
 768
 769static char *quote_ref_url(const char *base, const char *ref)
 770{
 771        struct strbuf buf = STRBUF_INIT;
 772        const char *cp;
 773        int ch;
 774
 775        end_url_with_slash(&buf, base);
 776
 777        for (cp = ref; (ch = *cp) != 0; cp++)
 778                if (needs_quote(ch))
 779                        strbuf_addf(&buf, "%%%02x", ch);
 780                else
 781                        strbuf_addch(&buf, *cp);
 782
 783        return strbuf_detach(&buf, NULL);
 784}
 785
 786void append_remote_object_url(struct strbuf *buf, const char *url,
 787                              const char *hex,
 788                              int only_two_digit_prefix)
 789{
 790        end_url_with_slash(buf, url);
 791
 792        strbuf_addf(buf, "objects/%.*s/", 2, hex);
 793        if (!only_two_digit_prefix)
 794                strbuf_addf(buf, "%s", hex+2);
 795}
 796
 797char *get_remote_object_url(const char *url, const char *hex,
 798                            int only_two_digit_prefix)
 799{
 800        struct strbuf buf = STRBUF_INIT;
 801        append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 802        return strbuf_detach(&buf, NULL);
 803}
 804
 805/* http_request() targets */
 806#define HTTP_REQUEST_STRBUF     0
 807#define HTTP_REQUEST_FILE       1
 808
 809static int http_request(const char *url, void *result, int target, int options)
 810{
 811        struct active_request_slot *slot;
 812        struct slot_results results;
 813        struct curl_slist *headers = NULL;
 814        struct strbuf buf = STRBUF_INIT;
 815        int ret;
 816
 817        slot = get_active_slot();
 818        slot->results = &results;
 819        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 820
 821        if (result == NULL) {
 822                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 823        } else {
 824                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 825                curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 826
 827                if (target == HTTP_REQUEST_FILE) {
 828                        long posn = ftell(result);
 829                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 830                                         fwrite);
 831                        if (posn > 0) {
 832                                strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 833                                headers = curl_slist_append(headers, buf.buf);
 834                                strbuf_reset(&buf);
 835                        }
 836                        slot->local = result;
 837                } else
 838                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 839                                         fwrite_buffer);
 840        }
 841
 842        strbuf_addstr(&buf, "Pragma:");
 843        if (options & HTTP_NO_CACHE)
 844                strbuf_addstr(&buf, " no-cache");
 845
 846        headers = curl_slist_append(headers, buf.buf);
 847
 848        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 849        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 850
 851        if (start_active_slot(slot)) {
 852                run_active_slot(slot);
 853                if (results.curl_result == CURLE_OK)
 854                        ret = HTTP_OK;
 855                else if (missing_target(&results))
 856                        ret = HTTP_MISSING_TARGET;
 857                else if (results.http_code == 401) {
 858                        if (user_name) {
 859                                ret = HTTP_NOAUTH;
 860                        } else {
 861                                /*
 862                                 * git_getpass is needed here because its very likely stdin/stdout are
 863                                 * pipes to our parent process.  So we instead need to use /dev/tty,
 864                                 * but that is non-portable.  Using git_getpass() can at least be stubbed
 865                                 * on other platforms with a different implementation if/when necessary.
 866                                 */
 867                                user_name = xstrdup(git_getpass("Username: "));
 868                                init_curl_http_auth(slot->curl);
 869                                ret = HTTP_REAUTH;
 870                        }
 871                } else
 872                        ret = HTTP_ERROR;
 873        } else {
 874                error("Unable to start HTTP request for %s", url);
 875                ret = HTTP_START_FAILED;
 876        }
 877
 878        slot->local = NULL;
 879        curl_slist_free_all(headers);
 880        strbuf_release(&buf);
 881
 882        return ret;
 883}
 884
 885int http_get_strbuf(const char *url, struct strbuf *result, int options)
 886{
 887        int http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 888        if (http_ret == HTTP_REAUTH) {
 889                http_ret = http_request(url, result, HTTP_REQUEST_STRBUF, options);
 890        }
 891        return http_ret;
 892}
 893
 894/*
 895 * Downloads an url and stores the result in the given file.
 896 *
 897 * If a previous interrupted download is detected (i.e. a previous temporary
 898 * file is still around) the download is resumed.
 899 */
 900static int http_get_file(const char *url, const char *filename, int options)
 901{
 902        int ret;
 903        struct strbuf tmpfile = STRBUF_INIT;
 904        FILE *result;
 905
 906        strbuf_addf(&tmpfile, "%s.temp", filename);
 907        result = fopen(tmpfile.buf, "a");
 908        if (! result) {
 909                error("Unable to open local file %s", tmpfile.buf);
 910                ret = HTTP_ERROR;
 911                goto cleanup;
 912        }
 913
 914        ret = http_request(url, result, HTTP_REQUEST_FILE, options);
 915        fclose(result);
 916
 917        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 918                ret = HTTP_ERROR;
 919cleanup:
 920        strbuf_release(&tmpfile);
 921        return ret;
 922}
 923
 924int http_error(const char *url, int ret)
 925{
 926        /* http_request has already handled HTTP_START_FAILED. */
 927        if (ret != HTTP_START_FAILED)
 928                error("%s while accessing %s\n", curl_errorstr, url);
 929
 930        return ret;
 931}
 932
 933int http_fetch_ref(const char *base, struct ref *ref)
 934{
 935        char *url;
 936        struct strbuf buffer = STRBUF_INIT;
 937        int ret = -1;
 938
 939        url = quote_ref_url(base, ref->name);
 940        if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 941                strbuf_rtrim(&buffer);
 942                if (buffer.len == 40)
 943                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 944                else if (!prefixcmp(buffer.buf, "ref: ")) {
 945                        ref->symref = xstrdup(buffer.buf + 5);
 946                        ret = 0;
 947                }
 948        }
 949
 950        strbuf_release(&buffer);
 951        free(url);
 952        return ret;
 953}
 954
 955/* Helpers for fetching packs */
 956static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 957{
 958        char *url, *tmp;
 959        struct strbuf buf = STRBUF_INIT;
 960
 961        if (http_is_verbose)
 962                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 963
 964        end_url_with_slash(&buf, base_url);
 965        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 966        url = strbuf_detach(&buf, NULL);
 967
 968        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 969        tmp = strbuf_detach(&buf, NULL);
 970
 971        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 972                error("Unable to get pack index %s\n", url);
 973                free(tmp);
 974                tmp = NULL;
 975        }
 976
 977        free(url);
 978        return tmp;
 979}
 980
 981static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 982        unsigned char *sha1, const char *base_url)
 983{
 984        struct packed_git *new_pack;
 985        char *tmp_idx = NULL;
 986        int ret;
 987
 988        if (has_pack_index(sha1)) {
 989                new_pack = parse_pack_index(sha1, NULL);
 990                if (!new_pack)
 991                        return -1; /* parse_pack_index() already issued error message */
 992                goto add_pack;
 993        }
 994
 995        tmp_idx = fetch_pack_index(sha1, base_url);
 996        if (!tmp_idx)
 997                return -1;
 998
 999        new_pack = parse_pack_index(sha1, tmp_idx);
1000        if (!new_pack) {
1001                unlink(tmp_idx);
1002                free(tmp_idx);
1003
1004                return -1; /* parse_pack_index() already issued error message */
1005        }
1006
1007        ret = verify_pack_index(new_pack);
1008        if (!ret) {
1009                close_pack_index(new_pack);
1010                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1011        }
1012        free(tmp_idx);
1013        if (ret)
1014                return -1;
1015
1016add_pack:
1017        new_pack->next = *packs_head;
1018        *packs_head = new_pack;
1019        return 0;
1020}
1021
1022int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1023{
1024        int ret = 0, i = 0;
1025        char *url, *data;
1026        struct strbuf buf = STRBUF_INIT;
1027        unsigned char sha1[20];
1028
1029        end_url_with_slash(&buf, base_url);
1030        strbuf_addstr(&buf, "objects/info/packs");
1031        url = strbuf_detach(&buf, NULL);
1032
1033        ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
1034        if (ret != HTTP_OK)
1035                goto cleanup;
1036
1037        data = buf.buf;
1038        while (i < buf.len) {
1039                switch (data[i]) {
1040                case 'P':
1041                        i++;
1042                        if (i + 52 <= buf.len &&
1043                            !prefixcmp(data + i, " pack-") &&
1044                            !prefixcmp(data + i + 46, ".pack\n")) {
1045                                get_sha1_hex(data + i + 6, sha1);
1046                                fetch_and_setup_pack_index(packs_head, sha1,
1047                                                      base_url);
1048                                i += 51;
1049                                break;
1050                        }
1051                default:
1052                        while (i < buf.len && data[i] != '\n')
1053                                i++;
1054                }
1055                i++;
1056        }
1057
1058cleanup:
1059        free(url);
1060        return ret;
1061}
1062
1063void release_http_pack_request(struct http_pack_request *preq)
1064{
1065        if (preq->packfile != NULL) {
1066                fclose(preq->packfile);
1067                preq->packfile = NULL;
1068                preq->slot->local = NULL;
1069        }
1070        if (preq->range_header != NULL) {
1071                curl_slist_free_all(preq->range_header);
1072                preq->range_header = NULL;
1073        }
1074        preq->slot = NULL;
1075        free(preq->url);
1076}
1077
1078int finish_http_pack_request(struct http_pack_request *preq)
1079{
1080        struct packed_git **lst;
1081        struct packed_git *p = preq->target;
1082        char *tmp_idx;
1083        struct child_process ip;
1084        const char *ip_argv[8];
1085
1086        close_pack_index(p);
1087
1088        fclose(preq->packfile);
1089        preq->packfile = NULL;
1090        preq->slot->local = NULL;
1091
1092        lst = preq->lst;
1093        while (*lst != p)
1094                lst = &((*lst)->next);
1095        *lst = (*lst)->next;
1096
1097        tmp_idx = xstrdup(preq->tmpfile);
1098        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1099               ".idx.temp");
1100
1101        ip_argv[0] = "index-pack";
1102        ip_argv[1] = "-o";
1103        ip_argv[2] = tmp_idx;
1104        ip_argv[3] = preq->tmpfile;
1105        ip_argv[4] = NULL;
1106
1107        memset(&ip, 0, sizeof(ip));
1108        ip.argv = ip_argv;
1109        ip.git_cmd = 1;
1110        ip.no_stdin = 1;
1111        ip.no_stdout = 1;
1112
1113        if (run_command(&ip)) {
1114                unlink(preq->tmpfile);
1115                unlink(tmp_idx);
1116                free(tmp_idx);
1117                return -1;
1118        }
1119
1120        unlink(sha1_pack_index_name(p->sha1));
1121
1122        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1123         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1124                free(tmp_idx);
1125                return -1;
1126        }
1127
1128        install_packed_git(p);
1129        free(tmp_idx);
1130        return 0;
1131}
1132
1133struct http_pack_request *new_http_pack_request(
1134        struct packed_git *target, const char *base_url)
1135{
1136        long prev_posn = 0;
1137        char range[RANGE_HEADER_SIZE];
1138        struct strbuf buf = STRBUF_INIT;
1139        struct http_pack_request *preq;
1140
1141        preq = xmalloc(sizeof(*preq));
1142        preq->target = target;
1143        preq->range_header = NULL;
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 = xmalloc(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        memset(&freq->stream, 0, sizeof(freq->stream));
1274
1275        git_inflate_init(&freq->stream);
1276
1277        git_SHA1_Init(&freq->c);
1278
1279        freq->url = get_remote_object_url(base_url, hex, 0);
1280
1281        /*
1282         * If a previous temp file is present, process what was already
1283         * fetched.
1284         */
1285        prevlocal = open(prevfile, O_RDONLY);
1286        if (prevlocal != -1) {
1287                do {
1288                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1289                        if (prev_read>0) {
1290                                if (fwrite_sha1_file(prev_buf,
1291                                                     1,
1292                                                     prev_read,
1293                                                     freq) == prev_read) {
1294                                        prev_posn += prev_read;
1295                                } else {
1296                                        prev_read = -1;
1297                                }
1298                        }
1299                } while (prev_read > 0);
1300                close(prevlocal);
1301        }
1302        unlink_or_warn(prevfile);
1303
1304        /*
1305         * Reset inflate/SHA1 if there was an error reading the previous temp
1306         * file; also rewind to the beginning of the local file.
1307         */
1308        if (prev_read == -1) {
1309                memset(&freq->stream, 0, sizeof(freq->stream));
1310                git_inflate_init(&freq->stream);
1311                git_SHA1_Init(&freq->c);
1312                if (prev_posn>0) {
1313                        prev_posn = 0;
1314                        lseek(freq->localfile, 0, SEEK_SET);
1315                        if (ftruncate(freq->localfile, 0) < 0) {
1316                                error("Couldn't truncate temporary file %s: %s",
1317                                          freq->tmpfile, strerror(errno));
1318                                goto abort;
1319                        }
1320                }
1321        }
1322
1323        freq->slot = get_active_slot();
1324
1325        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1326        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1327        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1328        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1329        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1330
1331        /*
1332         * If we have successfully processed data from a previous fetch
1333         * attempt, only fetch the data we don't already have.
1334         */
1335        if (prev_posn>0) {
1336                if (http_is_verbose)
1337                        fprintf(stderr,
1338                                "Resuming fetch of object %s at byte %ld\n",
1339                                hex, prev_posn);
1340                sprintf(range, "Range: bytes=%ld-", prev_posn);
1341                range_header = curl_slist_append(range_header, range);
1342                curl_easy_setopt(freq->slot->curl,
1343                                 CURLOPT_HTTPHEADER, range_header);
1344        }
1345
1346        return freq;
1347
1348abort:
1349        free(filename);
1350        free(freq->url);
1351        free(freq);
1352        return NULL;
1353}
1354
1355void process_http_object_request(struct http_object_request *freq)
1356{
1357        if (freq->slot == NULL)
1358                return;
1359        freq->curl_result = freq->slot->curl_result;
1360        freq->http_code = freq->slot->http_code;
1361        freq->slot = NULL;
1362}
1363
1364int finish_http_object_request(struct http_object_request *freq)
1365{
1366        struct stat st;
1367
1368        close(freq->localfile);
1369        freq->localfile = -1;
1370
1371        process_http_object_request(freq);
1372
1373        if (freq->http_code == 416) {
1374                warning("requested range invalid; we may already have all the data.");
1375        } else if (freq->curl_result != CURLE_OK) {
1376                if (stat(freq->tmpfile, &st) == 0)
1377                        if (st.st_size == 0)
1378                                unlink_or_warn(freq->tmpfile);
1379                return -1;
1380        }
1381
1382        git_inflate_end(&freq->stream);
1383        git_SHA1_Final(freq->real_sha1, &freq->c);
1384        if (freq->zret != Z_STREAM_END) {
1385                unlink_or_warn(freq->tmpfile);
1386                return -1;
1387        }
1388        if (hashcmp(freq->sha1, freq->real_sha1)) {
1389                unlink_or_warn(freq->tmpfile);
1390                return -1;
1391        }
1392        freq->rename =
1393                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1394
1395        return freq->rename;
1396}
1397
1398void abort_http_object_request(struct http_object_request *freq)
1399{
1400        unlink_or_warn(freq->tmpfile);
1401
1402        release_http_object_request(freq);
1403}
1404
1405void release_http_object_request(struct http_object_request *freq)
1406{
1407        if (freq->localfile != -1) {
1408                close(freq->localfile);
1409                freq->localfile = -1;
1410        }
1411        if (freq->url != NULL) {
1412                free(freq->url);
1413                freq->url = NULL;
1414        }
1415        if (freq->slot != NULL) {
1416                freq->slot->callback_func = NULL;
1417                freq->slot->callback_data = NULL;
1418                release_active_slot(freq->slot);
1419                freq->slot = NULL;
1420        }
1421}