Andrew's git / gitweb.git / http.c
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http.con commit Support FTP-over-SSL/TLS for regular FTP (4bc444e)
   1#include "http.h"
   2#include "pack.h"
   3#include "sideband.h"
   4#include "run-command.h"
   5#include "url.h"
   6#include "credential.h"
   7#include "version.h"
   8
   9int active_requests;
  10int http_is_verbose;
  11size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  12
  13#if LIBCURL_VERSION_NUM >= 0x070a06
  14#define LIBCURL_CAN_HANDLE_AUTH_ANY
  15#endif
  16
  17static int min_curl_sessions = 1;
  18static int curl_session_count;
  19#ifdef USE_CURL_MULTI
  20static int max_requests = -1;
  21static CURLM *curlm;
  22#endif
  23#ifndef NO_CURL_EASY_DUPHANDLE
  24static CURL *curl_default;
  25#endif
  26
  27#define PREV_BUF_SIZE 4096
  28#define RANGE_HEADER_SIZE 30
  29
  30char curl_errorstr[CURL_ERROR_SIZE];
  31
  32static int curl_ssl_verify = -1;
  33static int curl_ssl_try;
  34static const char *ssl_cert;
  35#if LIBCURL_VERSION_NUM >= 0x070903
  36static const char *ssl_key;
  37#endif
  38#if LIBCURL_VERSION_NUM >= 0x070908
  39static const char *ssl_capath;
  40#endif
  41static const char *ssl_cainfo;
  42static long curl_low_speed_limit = -1;
  43static long curl_low_speed_time = -1;
  44static int curl_ftp_no_epsv;
  45static const char *curl_http_proxy;
  46static const char *curl_cookie_file;
  47static struct credential http_auth = CREDENTIAL_INIT;
  48static int http_proactive_auth;
  49static const char *user_agent;
  50
  51#if LIBCURL_VERSION_NUM >= 0x071700
  52/* Use CURLOPT_KEYPASSWD as is */
  53#elif LIBCURL_VERSION_NUM >= 0x070903
  54#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  55#else
  56#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  57#endif
  58
  59static struct credential cert_auth = CREDENTIAL_INIT;
  60static int ssl_cert_password_required;
  61
  62static struct curl_slist *pragma_header;
  63static struct curl_slist *no_pragma_header;
  64
  65static struct active_request_slot *active_queue_head;
  66
  67size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
  68{
  69        size_t size = eltsize * nmemb;
  70        struct buffer *buffer = buffer_;
  71
  72        if (size > buffer->buf.len - buffer->posn)
  73                size = buffer->buf.len - buffer->posn;
  74        memcpy(ptr, buffer->buf.buf + buffer->posn, size);
  75        buffer->posn += size;
  76
  77        return size;
  78}
  79
  80#ifndef NO_CURL_IOCTL
  81curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
  82{
  83        struct buffer *buffer = clientp;
  84
  85        switch (cmd) {
  86        case CURLIOCMD_NOP:
  87                return CURLIOE_OK;
  88
  89        case CURLIOCMD_RESTARTREAD:
  90                buffer->posn = 0;
  91                return CURLIOE_OK;
  92
  93        default:
  94                return CURLIOE_UNKNOWNCMD;
  95        }
  96}
  97#endif
  98
  99size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
 100{
 101        size_t size = eltsize * nmemb;
 102        struct strbuf *buffer = buffer_;
 103
 104        strbuf_add(buffer, ptr, size);
 105        return size;
 106}
 107
 108size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 109{
 110        return eltsize * nmemb;
 111}
 112
 113#ifdef USE_CURL_MULTI
 114static void process_curl_messages(void)
 115{
 116        int num_messages;
 117        struct active_request_slot *slot;
 118        CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 119
 120        while (curl_message != NULL) {
 121                if (curl_message->msg == CURLMSG_DONE) {
 122                        int curl_result = curl_message->data.result;
 123                        slot = active_queue_head;
 124                        while (slot != NULL &&
 125                               slot->curl != curl_message->easy_handle)
 126                                slot = slot->next;
 127                        if (slot != NULL) {
 128                                curl_multi_remove_handle(curlm, slot->curl);
 129                                slot->curl_result = curl_result;
 130                                finish_active_slot(slot);
 131                        } else {
 132                                fprintf(stderr, "Received DONE message for unknown request!\n");
 133                        }
 134                } else {
 135                        fprintf(stderr, "Unknown CURL message received: %d\n",
 136                                (int)curl_message->msg);
 137                }
 138                curl_message = curl_multi_info_read(curlm, &num_messages);
 139        }
 140}
 141#endif
 142
 143static int http_options(const char *var, const char *value, void *cb)
 144{
 145        if (!strcmp("http.sslverify", var)) {
 146                curl_ssl_verify = git_config_bool(var, value);
 147                return 0;
 148        }
 149        if (!strcmp("http.sslcert", var))
 150                return git_config_string(&ssl_cert, var, value);
 151#if LIBCURL_VERSION_NUM >= 0x070903
 152        if (!strcmp("http.sslkey", var))
 153                return git_config_string(&ssl_key, var, value);
 154#endif
 155#if LIBCURL_VERSION_NUM >= 0x070908
 156        if (!strcmp("http.sslcapath", var))
 157                return git_config_string(&ssl_capath, var, value);
 158#endif
 159        if (!strcmp("http.sslcainfo", var))
 160                return git_config_string(&ssl_cainfo, var, value);
 161        if (!strcmp("http.sslcertpasswordprotected", var)) {
 162                if (git_config_bool(var, value))
 163                        ssl_cert_password_required = 1;
 164                return 0;
 165        }
 166        if (!strcmp("http.ssltry", var)) {
 167                curl_ssl_try = git_config_bool(var, value);
 168                return 0;
 169        }
 170        if (!strcmp("http.minsessions", var)) {
 171                min_curl_sessions = git_config_int(var, value);
 172#ifndef USE_CURL_MULTI
 173                if (min_curl_sessions > 1)
 174                        min_curl_sessions = 1;
 175#endif
 176                return 0;
 177        }
 178#ifdef USE_CURL_MULTI
 179        if (!strcmp("http.maxrequests", var)) {
 180                max_requests = git_config_int(var, value);
 181                return 0;
 182        }
 183#endif
 184        if (!strcmp("http.lowspeedlimit", var)) {
 185                curl_low_speed_limit = (long)git_config_int(var, value);
 186                return 0;
 187        }
 188        if (!strcmp("http.lowspeedtime", var)) {
 189                curl_low_speed_time = (long)git_config_int(var, value);
 190                return 0;
 191        }
 192
 193        if (!strcmp("http.noepsv", var)) {
 194                curl_ftp_no_epsv = git_config_bool(var, value);
 195                return 0;
 196        }
 197        if (!strcmp("http.proxy", var))
 198                return git_config_string(&curl_http_proxy, var, value);
 199
 200        if (!strcmp("http.cookiefile", var))
 201                return git_config_string(&curl_cookie_file, var, value);
 202
 203        if (!strcmp("http.postbuffer", var)) {
 204                http_post_buffer = git_config_int(var, value);
 205                if (http_post_buffer < LARGE_PACKET_MAX)
 206                        http_post_buffer = LARGE_PACKET_MAX;
 207                return 0;
 208        }
 209
 210        if (!strcmp("http.useragent", var))
 211                return git_config_string(&user_agent, var, value);
 212
 213        /* Fall back on the default ones */
 214        return git_default_config(var, value, cb);
 215}
 216
 217static void init_curl_http_auth(CURL *result)
 218{
 219        if (!http_auth.username)
 220                return;
 221
 222        credential_fill(&http_auth);
 223
 224#if LIBCURL_VERSION_NUM >= 0x071301
 225        curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
 226        curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
 227#else
 228        {
 229                static struct strbuf up = STRBUF_INIT;
 230                strbuf_reset(&up);
 231                strbuf_addf(&up, "%s:%s",
 232                            http_auth.username, http_auth.password);
 233                curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
 234        }
 235#endif
 236}
 237
 238static int has_cert_password(void)
 239{
 240        if (ssl_cert == NULL || ssl_cert_password_required != 1)
 241                return 0;
 242        if (!cert_auth.password) {
 243                cert_auth.protocol = xstrdup("cert");
 244                cert_auth.username = xstrdup("");
 245                cert_auth.path = xstrdup(ssl_cert);
 246                credential_fill(&cert_auth);
 247        }
 248        return 1;
 249}
 250
 251static CURL *get_curl_handle(void)
 252{
 253        CURL *result = curl_easy_init();
 254
 255        if (!curl_ssl_verify) {
 256                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 257                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 258        } else {
 259                /* Verify authenticity of the peer's certificate */
 260                curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 261                /* The name in the cert must match whom we tried to connect */
 262                curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 263        }
 264
 265#if LIBCURL_VERSION_NUM >= 0x070907
 266        curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 267#endif
 268#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 269        curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 270#endif
 271
 272        if (http_proactive_auth)
 273                init_curl_http_auth(result);
 274
 275        if (ssl_cert != NULL)
 276                curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 277        if (has_cert_password())
 278                curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 279#if LIBCURL_VERSION_NUM >= 0x070903
 280        if (ssl_key != NULL)
 281                curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 282#endif
 283#if LIBCURL_VERSION_NUM >= 0x070908
 284        if (ssl_capath != NULL)
 285                curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 286#endif
 287        if (ssl_cainfo != NULL)
 288                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 289        curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 290
 291        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 292                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 293                                 curl_low_speed_limit);
 294                curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 295                                 curl_low_speed_time);
 296        }
 297
 298        curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 299#if LIBCURL_VERSION_NUM >= 0x071301
 300        curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 301#elif LIBCURL_VERSION_NUM >= 0x071101
 302        curl_easy_setopt(result, CURLOPT_POST301, 1);
 303#endif
 304
 305        if (getenv("GIT_CURL_VERBOSE"))
 306                curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 307
 308        curl_easy_setopt(result, CURLOPT_USERAGENT,
 309                user_agent ? user_agent : git_user_agent());
 310
 311        if (curl_ftp_no_epsv)
 312                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 313
 314#ifdef CURLOPT_USE_SSL
 315        if (curl_ssl_try)
 316                curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
 317#endif
 318
 319        if (curl_http_proxy) {
 320                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 321                curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 322        }
 323
 324        return result;
 325}
 326
 327static void set_from_env(const char **var, const char *envname)
 328{
 329        const char *val = getenv(envname);
 330        if (val)
 331                *var = val;
 332}
 333
 334void http_init(struct remote *remote, const char *url, int proactive_auth)
 335{
 336        char *low_speed_limit;
 337        char *low_speed_time;
 338
 339        http_is_verbose = 0;
 340
 341        git_config(http_options, NULL);
 342
 343        curl_global_init(CURL_GLOBAL_ALL);
 344
 345        http_proactive_auth = proactive_auth;
 346
 347        if (remote && remote->http_proxy)
 348                curl_http_proxy = xstrdup(remote->http_proxy);
 349
 350        pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 351        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 352
 353#ifdef USE_CURL_MULTI
 354        {
 355                char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 356                if (http_max_requests != NULL)
 357                        max_requests = atoi(http_max_requests);
 358        }
 359
 360        curlm = curl_multi_init();
 361        if (curlm == NULL) {
 362                fprintf(stderr, "Error creating curl multi handle.\n");
 363                exit(1);
 364        }
 365#endif
 366
 367        if (getenv("GIT_SSL_NO_VERIFY"))
 368                curl_ssl_verify = 0;
 369
 370        set_from_env(&ssl_cert, "GIT_SSL_CERT");
 371#if LIBCURL_VERSION_NUM >= 0x070903
 372        set_from_env(&ssl_key, "GIT_SSL_KEY");
 373#endif
 374#if LIBCURL_VERSION_NUM >= 0x070908
 375        set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 376#endif
 377        set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 378
 379        set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 380
 381        low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 382        if (low_speed_limit != NULL)
 383                curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 384        low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 385        if (low_speed_time != NULL)
 386                curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 387
 388        if (curl_ssl_verify == -1)
 389                curl_ssl_verify = 1;
 390
 391        curl_session_count = 0;
 392#ifdef USE_CURL_MULTI
 393        if (max_requests < 1)
 394                max_requests = DEFAULT_MAX_REQUESTS;
 395#endif
 396
 397        if (getenv("GIT_CURL_FTP_NO_EPSV"))
 398                curl_ftp_no_epsv = 1;
 399
 400        if (url) {
 401                credential_from_url(&http_auth, url);
 402                if (!ssl_cert_password_required &&
 403                    getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 404                    !prefixcmp(url, "https://"))
 405                        ssl_cert_password_required = 1;
 406        }
 407
 408#ifndef NO_CURL_EASY_DUPHANDLE
 409        curl_default = get_curl_handle();
 410#endif
 411}
 412
 413void http_cleanup(void)
 414{
 415        struct active_request_slot *slot = active_queue_head;
 416
 417        while (slot != NULL) {
 418                struct active_request_slot *next = slot->next;
 419                if (slot->curl != NULL) {
 420#ifdef USE_CURL_MULTI
 421                        curl_multi_remove_handle(curlm, slot->curl);
 422#endif
 423                        curl_easy_cleanup(slot->curl);
 424                }
 425                free(slot);
 426                slot = next;
 427        }
 428        active_queue_head = NULL;
 429
 430#ifndef NO_CURL_EASY_DUPHANDLE
 431        curl_easy_cleanup(curl_default);
 432#endif
 433
 434#ifdef USE_CURL_MULTI
 435        curl_multi_cleanup(curlm);
 436#endif
 437        curl_global_cleanup();
 438
 439        curl_slist_free_all(pragma_header);
 440        pragma_header = NULL;
 441
 442        curl_slist_free_all(no_pragma_header);
 443        no_pragma_header = NULL;
 444
 445        if (curl_http_proxy) {
 446                free((void *)curl_http_proxy);
 447                curl_http_proxy = NULL;
 448        }
 449
 450        if (cert_auth.password != NULL) {
 451                memset(cert_auth.password, 0, strlen(cert_auth.password));
 452                free(cert_auth.password);
 453                cert_auth.password = NULL;
 454        }
 455        ssl_cert_password_required = 0;
 456}
 457
 458struct active_request_slot *get_active_slot(void)
 459{
 460        struct active_request_slot *slot = active_queue_head;
 461        struct active_request_slot *newslot;
 462
 463#ifdef USE_CURL_MULTI
 464        int num_transfers;
 465
 466        /* Wait for a slot to open up if the queue is full */
 467        while (active_requests >= max_requests) {
 468                curl_multi_perform(curlm, &num_transfers);
 469                if (num_transfers < active_requests)
 470                        process_curl_messages();
 471        }
 472#endif
 473
 474        while (slot != NULL && slot->in_use)
 475                slot = slot->next;
 476
 477        if (slot == NULL) {
 478                newslot = xmalloc(sizeof(*newslot));
 479                newslot->curl = NULL;
 480                newslot->in_use = 0;
 481                newslot->next = NULL;
 482
 483                slot = active_queue_head;
 484                if (slot == NULL) {
 485                        active_queue_head = newslot;
 486                } else {
 487                        while (slot->next != NULL)
 488                                slot = slot->next;
 489                        slot->next = newslot;
 490                }
 491                slot = newslot;
 492        }
 493
 494        if (slot->curl == NULL) {
 495#ifdef NO_CURL_EASY_DUPHANDLE
 496                slot->curl = get_curl_handle();
 497#else
 498                slot->curl = curl_easy_duphandle(curl_default);
 499#endif
 500                curl_session_count++;
 501        }
 502
 503        active_requests++;
 504        slot->in_use = 1;
 505        slot->results = NULL;
 506        slot->finished = NULL;
 507        slot->callback_data = NULL;
 508        slot->callback_func = NULL;
 509        curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 510        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 511        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 512        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 513        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 514        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 515        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 516        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 517        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 518        if (http_auth.password)
 519                init_curl_http_auth(slot->curl);
 520
 521        return slot;
 522}
 523
 524int start_active_slot(struct active_request_slot *slot)
 525{
 526#ifdef USE_CURL_MULTI
 527        CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 528        int num_transfers;
 529
 530        if (curlm_result != CURLM_OK &&
 531            curlm_result != CURLM_CALL_MULTI_PERFORM) {
 532                active_requests--;
 533                slot->in_use = 0;
 534                return 0;
 535        }
 536
 537        /*
 538         * We know there must be something to do, since we just added
 539         * something.
 540         */
 541        curl_multi_perform(curlm, &num_transfers);
 542#endif
 543        return 1;
 544}
 545
 546#ifdef USE_CURL_MULTI
 547struct fill_chain {
 548        void *data;
 549        int (*fill)(void *);
 550        struct fill_chain *next;
 551};
 552
 553static struct fill_chain *fill_cfg;
 554
 555void add_fill_function(void *data, int (*fill)(void *))
 556{
 557        struct fill_chain *new = xmalloc(sizeof(*new));
 558        struct fill_chain **linkp = &fill_cfg;
 559        new->data = data;
 560        new->fill = fill;
 561        new->next = NULL;
 562        while (*linkp)
 563                linkp = &(*linkp)->next;
 564        *linkp = new;
 565}
 566
 567void fill_active_slots(void)
 568{
 569        struct active_request_slot *slot = active_queue_head;
 570
 571        while (active_requests < max_requests) {
 572                struct fill_chain *fill;
 573                for (fill = fill_cfg; fill; fill = fill->next)
 574                        if (fill->fill(fill->data))
 575                                break;
 576
 577                if (!fill)
 578                        break;
 579        }
 580
 581        while (slot != NULL) {
 582                if (!slot->in_use && slot->curl != NULL
 583                        && curl_session_count > min_curl_sessions) {
 584                        curl_easy_cleanup(slot->curl);
 585                        slot->curl = NULL;
 586                        curl_session_count--;
 587                }
 588                slot = slot->next;
 589        }
 590}
 591
 592void step_active_slots(void)
 593{
 594        int num_transfers;
 595        CURLMcode curlm_result;
 596
 597        do {
 598                curlm_result = curl_multi_perform(curlm, &num_transfers);
 599        } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 600        if (num_transfers < active_requests) {
 601                process_curl_messages();
 602                fill_active_slots();
 603        }
 604}
 605#endif
 606
 607void run_active_slot(struct active_request_slot *slot)
 608{
 609#ifdef USE_CURL_MULTI
 610        fd_set readfds;
 611        fd_set writefds;
 612        fd_set excfds;
 613        int max_fd;
 614        struct timeval select_timeout;
 615        int finished = 0;
 616
 617        slot->finished = &finished;
 618        while (!finished) {
 619                step_active_slots();
 620
 621                if (slot->in_use) {
 622#if LIBCURL_VERSION_NUM >= 0x070f04
 623                        long curl_timeout;
 624                        curl_multi_timeout(curlm, &curl_timeout);
 625                        if (curl_timeout == 0) {
 626                                continue;
 627                        } else if (curl_timeout == -1) {
 628                                select_timeout.tv_sec  = 0;
 629                                select_timeout.tv_usec = 50000;
 630                        } else {
 631                                select_timeout.tv_sec  =  curl_timeout / 1000;
 632                                select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 633                        }
 634#else
 635                        select_timeout.tv_sec  = 0;
 636                        select_timeout.tv_usec = 50000;
 637#endif
 638
 639                        max_fd = -1;
 640                        FD_ZERO(&readfds);
 641                        FD_ZERO(&writefds);
 642                        FD_ZERO(&excfds);
 643                        curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 644
 645                        /*
 646                         * It can happen that curl_multi_timeout returns a pathologically
 647                         * long timeout when curl_multi_fdset returns no file descriptors
 648                         * to read.  See commit message for more details.
 649                         */
 650                        if (max_fd < 0 &&
 651                            (select_timeout.tv_sec > 0 ||
 652                             select_timeout.tv_usec > 50000)) {
 653                                select_timeout.tv_sec  = 0;
 654                                select_timeout.tv_usec = 50000;
 655                        }
 656
 657                        select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 658                }
 659        }
 660#else
 661        while (slot->in_use) {
 662                slot->curl_result = curl_easy_perform(slot->curl);
 663                finish_active_slot(slot);
 664        }
 665#endif
 666}
 667
 668static void closedown_active_slot(struct active_request_slot *slot)
 669{
 670        active_requests--;
 671        slot->in_use = 0;
 672}
 673
 674static void release_active_slot(struct active_request_slot *slot)
 675{
 676        closedown_active_slot(slot);
 677        if (slot->curl && curl_session_count > min_curl_sessions) {
 678#ifdef USE_CURL_MULTI
 679                curl_multi_remove_handle(curlm, slot->curl);
 680#endif
 681                curl_easy_cleanup(slot->curl);
 682                slot->curl = NULL;
 683                curl_session_count--;
 684        }
 685#ifdef USE_CURL_MULTI
 686        fill_active_slots();
 687#endif
 688}
 689
 690void finish_active_slot(struct active_request_slot *slot)
 691{
 692        closedown_active_slot(slot);
 693        curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 694
 695        if (slot->finished != NULL)
 696                (*slot->finished) = 1;
 697
 698        /* Store slot results so they can be read after the slot is reused */
 699        if (slot->results != NULL) {
 700                slot->results->curl_result = slot->curl_result;
 701                slot->results->http_code = slot->http_code;
 702        }
 703
 704        /* Run callback if appropriate */
 705        if (slot->callback_func != NULL)
 706                slot->callback_func(slot->callback_data);
 707}
 708
 709void finish_all_active_slots(void)
 710{
 711        struct active_request_slot *slot = active_queue_head;
 712
 713        while (slot != NULL)
 714                if (slot->in_use) {
 715                        run_active_slot(slot);
 716                        slot = active_queue_head;
 717                } else {
 718                        slot = slot->next;
 719                }
 720}
 721
 722/* Helpers for modifying and creating URLs */
 723static inline int needs_quote(int ch)
 724{
 725        if (((ch >= 'A') && (ch <= 'Z'))
 726                        || ((ch >= 'a') && (ch <= 'z'))
 727                        || ((ch >= '0') && (ch <= '9'))
 728                        || (ch == '/')
 729                        || (ch == '-')
 730                        || (ch == '.'))
 731                return 0;
 732        return 1;
 733}
 734
 735static char *quote_ref_url(const char *base, const char *ref)
 736{
 737        struct strbuf buf = STRBUF_INIT;
 738        const char *cp;
 739        int ch;
 740
 741        end_url_with_slash(&buf, base);
 742
 743        for (cp = ref; (ch = *cp) != 0; cp++)
 744                if (needs_quote(ch))
 745                        strbuf_addf(&buf, "%%%02x", ch);
 746                else
 747                        strbuf_addch(&buf, *cp);
 748
 749        return strbuf_detach(&buf, NULL);
 750}
 751
 752void append_remote_object_url(struct strbuf *buf, const char *url,
 753                              const char *hex,
 754                              int only_two_digit_prefix)
 755{
 756        end_url_with_slash(buf, url);
 757
 758        strbuf_addf(buf, "objects/%.*s/", 2, hex);
 759        if (!only_two_digit_prefix)
 760                strbuf_addf(buf, "%s", hex+2);
 761}
 762
 763char *get_remote_object_url(const char *url, const char *hex,
 764                            int only_two_digit_prefix)
 765{
 766        struct strbuf buf = STRBUF_INIT;
 767        append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 768        return strbuf_detach(&buf, NULL);
 769}
 770
 771int handle_curl_result(struct slot_results *results)
 772{
 773        if (results->curl_result == CURLE_OK) {
 774                credential_approve(&http_auth);
 775                return HTTP_OK;
 776        } else if (missing_target(results))
 777                return HTTP_MISSING_TARGET;
 778        else if (results->http_code == 401) {
 779                if (http_auth.username && http_auth.password) {
 780                        credential_reject(&http_auth);
 781                        return HTTP_NOAUTH;
 782                } else {
 783                        credential_fill(&http_auth);
 784                        return HTTP_REAUTH;
 785                }
 786        } else {
 787#if LIBCURL_VERSION_NUM >= 0x070c00
 788                if (!curl_errorstr[0])
 789                        strlcpy(curl_errorstr,
 790                                curl_easy_strerror(results->curl_result),
 791                                sizeof(curl_errorstr));
 792#endif
 793                return HTTP_ERROR;
 794        }
 795}
 796
 797/* http_request() targets */
 798#define HTTP_REQUEST_STRBUF     0
 799#define HTTP_REQUEST_FILE       1
 800
 801static int http_request(const char *url, struct strbuf *type,
 802                        void *result, int target, int options)
 803{
 804        struct active_request_slot *slot;
 805        struct slot_results results;
 806        struct curl_slist *headers = NULL;
 807        struct strbuf buf = STRBUF_INIT;
 808        int ret;
 809
 810        slot = get_active_slot();
 811        slot->results = &results;
 812        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 813
 814        if (result == NULL) {
 815                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 816        } else {
 817                curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 818                curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
 819
 820                if (target == HTTP_REQUEST_FILE) {
 821                        long posn = ftell(result);
 822                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 823                                         fwrite);
 824                        if (posn > 0) {
 825                                strbuf_addf(&buf, "Range: bytes=%ld-", posn);
 826                                headers = curl_slist_append(headers, buf.buf);
 827                                strbuf_reset(&buf);
 828                        }
 829                } else
 830                        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
 831                                         fwrite_buffer);
 832        }
 833
 834        strbuf_addstr(&buf, "Pragma:");
 835        if (options & HTTP_NO_CACHE)
 836                strbuf_addstr(&buf, " no-cache");
 837
 838        headers = curl_slist_append(headers, buf.buf);
 839
 840        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 841        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 842        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 843
 844        if (start_active_slot(slot)) {
 845                run_active_slot(slot);
 846                ret = handle_curl_result(&results);
 847        } else {
 848                error("Unable to start HTTP request for %s", url);
 849                ret = HTTP_START_FAILED;
 850        }
 851
 852        if (type) {
 853                char *t;
 854                strbuf_reset(type);
 855                curl_easy_getinfo(slot->curl, CURLINFO_CONTENT_TYPE, &t);
 856                if (t)
 857                        strbuf_addstr(type, t);
 858        }
 859
 860        curl_slist_free_all(headers);
 861        strbuf_release(&buf);
 862
 863        return ret;
 864}
 865
 866static int http_request_reauth(const char *url,
 867                               struct strbuf *type,
 868                               void *result, int target,
 869                               int options)
 870{
 871        int ret = http_request(url, type, result, target, options);
 872        if (ret != HTTP_REAUTH)
 873                return ret;
 874        return http_request(url, type, result, target, options);
 875}
 876
 877int http_get_strbuf(const char *url,
 878                    struct strbuf *type,
 879                    struct strbuf *result, int options)
 880{
 881        return http_request_reauth(url, type, result,
 882                                   HTTP_REQUEST_STRBUF, options);
 883}
 884
 885/*
 886 * Downloads a URL and stores the result in the given file.
 887 *
 888 * If a previous interrupted download is detected (i.e. a previous temporary
 889 * file is still around) the download is resumed.
 890 */
 891static int http_get_file(const char *url, const char *filename, int options)
 892{
 893        int ret;
 894        struct strbuf tmpfile = STRBUF_INIT;
 895        FILE *result;
 896
 897        strbuf_addf(&tmpfile, "%s.temp", filename);
 898        result = fopen(tmpfile.buf, "a");
 899        if (! result) {
 900                error("Unable to open local file %s", tmpfile.buf);
 901                ret = HTTP_ERROR;
 902                goto cleanup;
 903        }
 904
 905        ret = http_request_reauth(url, NULL, result, HTTP_REQUEST_FILE, options);
 906        fclose(result);
 907
 908        if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
 909                ret = HTTP_ERROR;
 910cleanup:
 911        strbuf_release(&tmpfile);
 912        return ret;
 913}
 914
 915int http_error(const char *url, int ret)
 916{
 917        /* http_request has already handled HTTP_START_FAILED. */
 918        if (ret != HTTP_START_FAILED)
 919                error("%s while accessing %s", curl_errorstr, url);
 920
 921        return ret;
 922}
 923
 924int http_fetch_ref(const char *base, struct ref *ref)
 925{
 926        char *url;
 927        struct strbuf buffer = STRBUF_INIT;
 928        int ret = -1;
 929
 930        url = quote_ref_url(base, ref->name);
 931        if (http_get_strbuf(url, NULL, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
 932                strbuf_rtrim(&buffer);
 933                if (buffer.len == 40)
 934                        ret = get_sha1_hex(buffer.buf, ref->old_sha1);
 935                else if (!prefixcmp(buffer.buf, "ref: ")) {
 936                        ref->symref = xstrdup(buffer.buf + 5);
 937                        ret = 0;
 938                }
 939        }
 940
 941        strbuf_release(&buffer);
 942        free(url);
 943        return ret;
 944}
 945
 946/* Helpers for fetching packs */
 947static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
 948{
 949        char *url, *tmp;
 950        struct strbuf buf = STRBUF_INIT;
 951
 952        if (http_is_verbose)
 953                fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
 954
 955        end_url_with_slash(&buf, base_url);
 956        strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
 957        url = strbuf_detach(&buf, NULL);
 958
 959        strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
 960        tmp = strbuf_detach(&buf, NULL);
 961
 962        if (http_get_file(url, tmp, 0) != HTTP_OK) {
 963                error("Unable to get pack index %s", url);
 964                free(tmp);
 965                tmp = NULL;
 966        }
 967
 968        free(url);
 969        return tmp;
 970}
 971
 972static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 973        unsigned char *sha1, const char *base_url)
 974{
 975        struct packed_git *new_pack;
 976        char *tmp_idx = NULL;
 977        int ret;
 978
 979        if (has_pack_index(sha1)) {
 980                new_pack = parse_pack_index(sha1, NULL);
 981                if (!new_pack)
 982                        return -1; /* parse_pack_index() already issued error message */
 983                goto add_pack;
 984        }
 985
 986        tmp_idx = fetch_pack_index(sha1, base_url);
 987        if (!tmp_idx)
 988                return -1;
 989
 990        new_pack = parse_pack_index(sha1, tmp_idx);
 991        if (!new_pack) {
 992                unlink(tmp_idx);
 993                free(tmp_idx);
 994
 995                return -1; /* parse_pack_index() already issued error message */
 996        }
 997
 998        ret = verify_pack_index(new_pack);
 999        if (!ret) {
1000                close_pack_index(new_pack);
1001                ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1002        }
1003        free(tmp_idx);
1004        if (ret)
1005                return -1;
1006
1007add_pack:
1008        new_pack->next = *packs_head;
1009        *packs_head = new_pack;
1010        return 0;
1011}
1012
1013int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1014{
1015        int ret = 0, i = 0;
1016        char *url, *data;
1017        struct strbuf buf = STRBUF_INIT;
1018        unsigned char sha1[20];
1019
1020        end_url_with_slash(&buf, base_url);
1021        strbuf_addstr(&buf, "objects/info/packs");
1022        url = strbuf_detach(&buf, NULL);
1023
1024        ret = http_get_strbuf(url, NULL, &buf, HTTP_NO_CACHE);
1025        if (ret != HTTP_OK)
1026                goto cleanup;
1027
1028        data = buf.buf;
1029        while (i < buf.len) {
1030                switch (data[i]) {
1031                case 'P':
1032                        i++;
1033                        if (i + 52 <= buf.len &&
1034                            !prefixcmp(data + i, " pack-") &&
1035                            !prefixcmp(data + i + 46, ".pack\n")) {
1036                                get_sha1_hex(data + i + 6, sha1);
1037                                fetch_and_setup_pack_index(packs_head, sha1,
1038                                                      base_url);
1039                                i += 51;
1040                                break;
1041                        }
1042                default:
1043                        while (i < buf.len && data[i] != '\n')
1044                                i++;
1045                }
1046                i++;
1047        }
1048
1049cleanup:
1050        free(url);
1051        return ret;
1052}
1053
1054void release_http_pack_request(struct http_pack_request *preq)
1055{
1056        if (preq->packfile != NULL) {
1057                fclose(preq->packfile);
1058                preq->packfile = NULL;
1059        }
1060        if (preq->range_header != NULL) {
1061                curl_slist_free_all(preq->range_header);
1062                preq->range_header = NULL;
1063        }
1064        preq->slot = NULL;
1065        free(preq->url);
1066}
1067
1068int finish_http_pack_request(struct http_pack_request *preq)
1069{
1070        struct packed_git **lst;
1071        struct packed_git *p = preq->target;
1072        char *tmp_idx;
1073        struct child_process ip;
1074        const char *ip_argv[8];
1075
1076        close_pack_index(p);
1077
1078        fclose(preq->packfile);
1079        preq->packfile = NULL;
1080
1081        lst = preq->lst;
1082        while (*lst != p)
1083                lst = &((*lst)->next);
1084        *lst = (*lst)->next;
1085
1086        tmp_idx = xstrdup(preq->tmpfile);
1087        strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1088               ".idx.temp");
1089
1090        ip_argv[0] = "index-pack";
1091        ip_argv[1] = "-o";
1092        ip_argv[2] = tmp_idx;
1093        ip_argv[3] = preq->tmpfile;
1094        ip_argv[4] = NULL;
1095
1096        memset(&ip, 0, sizeof(ip));
1097        ip.argv = ip_argv;
1098        ip.git_cmd = 1;
1099        ip.no_stdin = 1;
1100        ip.no_stdout = 1;
1101
1102        if (run_command(&ip)) {
1103                unlink(preq->tmpfile);
1104                unlink(tmp_idx);
1105                free(tmp_idx);
1106                return -1;
1107        }
1108
1109        unlink(sha1_pack_index_name(p->sha1));
1110
1111        if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1112         || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1113                free(tmp_idx);
1114                return -1;
1115        }
1116
1117        install_packed_git(p);
1118        free(tmp_idx);
1119        return 0;
1120}
1121
1122struct http_pack_request *new_http_pack_request(
1123        struct packed_git *target, const char *base_url)
1124{
1125        long prev_posn = 0;
1126        char range[RANGE_HEADER_SIZE];
1127        struct strbuf buf = STRBUF_INIT;
1128        struct http_pack_request *preq;
1129
1130        preq = xcalloc(1, sizeof(*preq));
1131        preq->target = target;
1132
1133        end_url_with_slash(&buf, base_url);
1134        strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1135                sha1_to_hex(target->sha1));
1136        preq->url = strbuf_detach(&buf, NULL);
1137
1138        snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1139                sha1_pack_name(target->sha1));
1140        preq->packfile = fopen(preq->tmpfile, "a");
1141        if (!preq->packfile) {
1142                error("Unable to open local file %s for pack",
1143                      preq->tmpfile);
1144                goto abort;
1145        }
1146
1147        preq->slot = get_active_slot();
1148        curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1149        curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1150        curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1151        curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1152                no_pragma_header);
1153
1154        /*
1155         * If there is data present from a previous transfer attempt,
1156         * resume where it left off
1157         */
1158        prev_posn = ftell(preq->packfile);
1159        if (prev_posn>0) {
1160                if (http_is_verbose)
1161                        fprintf(stderr,
1162                                "Resuming fetch of pack %s at byte %ld\n",
1163                                sha1_to_hex(target->sha1), prev_posn);
1164                sprintf(range, "Range: bytes=%ld-", prev_posn);
1165                preq->range_header = curl_slist_append(NULL, range);
1166                curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1167                        preq->range_header);
1168        }
1169
1170        return preq;
1171
1172abort:
1173        free(preq->url);
1174        free(preq);
1175        return NULL;
1176}
1177
1178/* Helpers for fetching objects (loose) */
1179static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1180                               void *data)
1181{
1182        unsigned char expn[4096];
1183        size_t size = eltsize * nmemb;
1184        int posn = 0;
1185        struct http_object_request *freq =
1186                (struct http_object_request *)data;
1187        do {
1188                ssize_t retval = xwrite(freq->localfile,
1189                                        (char *) ptr + posn, size - posn);
1190                if (retval < 0)
1191                        return posn;
1192                posn += retval;
1193        } while (posn < size);
1194
1195        freq->stream.avail_in = size;
1196        freq->stream.next_in = (void *)ptr;
1197        do {
1198                freq->stream.next_out = expn;
1199                freq->stream.avail_out = sizeof(expn);
1200                freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1201                git_SHA1_Update(&freq->c, expn,
1202                                sizeof(expn) - freq->stream.avail_out);
1203        } while (freq->stream.avail_in && freq->zret == Z_OK);
1204        return size;
1205}
1206
1207struct http_object_request *new_http_object_request(const char *base_url,
1208        unsigned char *sha1)
1209{
1210        char *hex = sha1_to_hex(sha1);
1211        char *filename;
1212        char prevfile[PATH_MAX];
1213        int prevlocal;
1214        char prev_buf[PREV_BUF_SIZE];
1215        ssize_t prev_read = 0;
1216        long prev_posn = 0;
1217        char range[RANGE_HEADER_SIZE];
1218        struct curl_slist *range_header = NULL;
1219        struct http_object_request *freq;
1220
1221        freq = xcalloc(1, sizeof(*freq));
1222        hashcpy(freq->sha1, sha1);
1223        freq->localfile = -1;
1224
1225        filename = sha1_file_name(sha1);
1226        snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1227                 "%s.temp", filename);
1228
1229        snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1230        unlink_or_warn(prevfile);
1231        rename(freq->tmpfile, prevfile);
1232        unlink_or_warn(freq->tmpfile);
1233
1234        if (freq->localfile != -1)
1235                error("fd leakage in start: %d", freq->localfile);
1236        freq->localfile = open(freq->tmpfile,
1237                               O_WRONLY | O_CREAT | O_EXCL, 0666);
1238        /*
1239         * This could have failed due to the "lazy directory creation";
1240         * try to mkdir the last path component.
1241         */
1242        if (freq->localfile < 0 && errno == ENOENT) {
1243                char *dir = strrchr(freq->tmpfile, '/');
1244                if (dir) {
1245                        *dir = 0;
1246                        mkdir(freq->tmpfile, 0777);
1247                        *dir = '/';
1248                }
1249                freq->localfile = open(freq->tmpfile,
1250                                       O_WRONLY | O_CREAT | O_EXCL, 0666);
1251        }
1252
1253        if (freq->localfile < 0) {
1254                error("Couldn't create temporary file %s: %s",
1255                      freq->tmpfile, strerror(errno));
1256                goto abort;
1257        }
1258
1259        git_inflate_init(&freq->stream);
1260
1261        git_SHA1_Init(&freq->c);
1262
1263        freq->url = get_remote_object_url(base_url, hex, 0);
1264
1265        /*
1266         * If a previous temp file is present, process what was already
1267         * fetched.
1268         */
1269        prevlocal = open(prevfile, O_RDONLY);
1270        if (prevlocal != -1) {
1271                do {
1272                        prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1273                        if (prev_read>0) {
1274                                if (fwrite_sha1_file(prev_buf,
1275                                                     1,
1276                                                     prev_read,
1277                                                     freq) == prev_read) {
1278                                        prev_posn += prev_read;
1279                                } else {
1280                                        prev_read = -1;
1281                                }
1282                        }
1283                } while (prev_read > 0);
1284                close(prevlocal);
1285        }
1286        unlink_or_warn(prevfile);
1287
1288        /*
1289         * Reset inflate/SHA1 if there was an error reading the previous temp
1290         * file; also rewind to the beginning of the local file.
1291         */
1292        if (prev_read == -1) {
1293                memset(&freq->stream, 0, sizeof(freq->stream));
1294                git_inflate_init(&freq->stream);
1295                git_SHA1_Init(&freq->c);
1296                if (prev_posn>0) {
1297                        prev_posn = 0;
1298                        lseek(freq->localfile, 0, SEEK_SET);
1299                        if (ftruncate(freq->localfile, 0) < 0) {
1300                                error("Couldn't truncate temporary file %s: %s",
1301                                          freq->tmpfile, strerror(errno));
1302                                goto abort;
1303                        }
1304                }
1305        }
1306
1307        freq->slot = get_active_slot();
1308
1309        curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1310        curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1311        curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1312        curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1313        curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1314
1315        /*
1316         * If we have successfully processed data from a previous fetch
1317         * attempt, only fetch the data we don't already have.
1318         */
1319        if (prev_posn>0) {
1320                if (http_is_verbose)
1321                        fprintf(stderr,
1322                                "Resuming fetch of object %s at byte %ld\n",
1323                                hex, prev_posn);
1324                sprintf(range, "Range: bytes=%ld-", prev_posn);
1325                range_header = curl_slist_append(range_header, range);
1326                curl_easy_setopt(freq->slot->curl,
1327                                 CURLOPT_HTTPHEADER, range_header);
1328        }
1329
1330        return freq;
1331
1332abort:
1333        free(freq->url);
1334        free(freq);
1335        return NULL;
1336}
1337
1338void process_http_object_request(struct http_object_request *freq)
1339{
1340        if (freq->slot == NULL)
1341                return;
1342        freq->curl_result = freq->slot->curl_result;
1343        freq->http_code = freq->slot->http_code;
1344        freq->slot = NULL;
1345}
1346
1347int finish_http_object_request(struct http_object_request *freq)
1348{
1349        struct stat st;
1350
1351        close(freq->localfile);
1352        freq->localfile = -1;
1353
1354        process_http_object_request(freq);
1355
1356        if (freq->http_code == 416) {
1357                warning("requested range invalid; we may already have all the data.");
1358        } else if (freq->curl_result != CURLE_OK) {
1359                if (stat(freq->tmpfile, &st) == 0)
1360                        if (st.st_size == 0)
1361                                unlink_or_warn(freq->tmpfile);
1362                return -1;
1363        }
1364
1365        git_inflate_end(&freq->stream);
1366        git_SHA1_Final(freq->real_sha1, &freq->c);
1367        if (freq->zret != Z_STREAM_END) {
1368                unlink_or_warn(freq->tmpfile);
1369                return -1;
1370        }
1371        if (hashcmp(freq->sha1, freq->real_sha1)) {
1372                unlink_or_warn(freq->tmpfile);
1373                return -1;
1374        }
1375        freq->rename =
1376                move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1377
1378        return freq->rename;
1379}
1380
1381void abort_http_object_request(struct http_object_request *freq)
1382{
1383        unlink_or_warn(freq->tmpfile);
1384
1385        release_http_object_request(freq);
1386}
1387
1388void release_http_object_request(struct http_object_request *freq)
1389{
1390        if (freq->localfile != -1) {
1391                close(freq->localfile);
1392                freq->localfile = -1;
1393        }
1394        if (freq->url != NULL) {
1395                free(freq->url);
1396                freq->url = NULL;
1397        }
1398        if (freq->slot != NULL) {
1399                freq->slot->callback_func = NULL;
1400                freq->slot->callback_data = NULL;
1401                release_active_slot(freq->slot);
1402                freq->slot = NULL;
1403        }
1404}