git.oblomov.eu Git - git/blob - http.c

   1 #include "git-compat-util.h"
   2 #include "http.h"
   3 #include "pack.h"
   4 #include "sideband.h"
   5 #include "run-command.h"
   6 #include "url.h"
   7 #include "urlmatch.h"
   8 #include "credential.h"
   9 #include "version.h"
  10 #include "pkt-line.h"
  11 #include "gettext.h"
  12 #include "transport.h"
  13
  14 int active_requests;
  15 int http_is_verbose;
  16 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
  17
  18 #if LIBCURL_VERSION_NUM >= 0x070a06
  19 #define LIBCURL_CAN_HANDLE_AUTH_ANY
  20 #endif
  21
  22 static int min_curl_sessions = 1;
  23 static int curl_session_count;
  24 #ifdef USE_CURL_MULTI
  25 static int max_requests = -1;
  26 static CURLM *curlm;
  27 #endif
  28 #ifndef NO_CURL_EASY_DUPHANDLE
  29 static CURL *curl_default;
  30 #endif
  31
  32 #define PREV_BUF_SIZE 4096
  33
  34 char curl_errorstr[CURL_ERROR_SIZE];
  35
  36 static int curl_ssl_verify = -1;
  37 static int curl_ssl_try;
  38 static const char *ssl_cert;
  39 static const char *ssl_cipherlist;
  40 static const char *ssl_version;
  41 static struct {
  42         const char *name;
  43         long ssl_version;
  44 } sslversions[] = {
  45         { "sslv2", CURL_SSLVERSION_SSLv2 },
  46         { "sslv3", CURL_SSLVERSION_SSLv3 },
  47         { "tlsv1", CURL_SSLVERSION_TLSv1 },
  48 #if LIBCURL_VERSION_NUM >= 0x072200
  49         { "tlsv1.0", CURL_SSLVERSION_TLSv1_0 },
  50         { "tlsv1.1", CURL_SSLVERSION_TLSv1_1 },
  51         { "tlsv1.2", CURL_SSLVERSION_TLSv1_2 },
  52 #endif
  53 };
  54 #if LIBCURL_VERSION_NUM >= 0x070903
  55 static const char *ssl_key;
  56 #endif
  57 #if LIBCURL_VERSION_NUM >= 0x070908
  58 static const char *ssl_capath;
  59 #endif
  60 static const char *ssl_cainfo;
  61 static long curl_low_speed_limit = -1;
  62 static long curl_low_speed_time = -1;
  63 static int curl_ftp_no_epsv;
  64 static const char *curl_http_proxy;
  65 static const char *http_proxy_authmethod;
  66 static struct {
  67         const char *name;
  68         long curlauth_param;
  69 } proxy_authmethods[] = {
  70         { "basic", CURLAUTH_BASIC },
  71         { "digest", CURLAUTH_DIGEST },
  72         { "negotiate", CURLAUTH_GSSNEGOTIATE },
  73         { "ntlm", CURLAUTH_NTLM },
  74 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
  75         { "anyauth", CURLAUTH_ANY },
  76 #endif
  77         /*
  78          * CURLAUTH_DIGEST_IE has no corresponding command-line option in
  79          * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
  80          * here, too
  81          */
  82 };
  83 static struct credential proxy_auth = CREDENTIAL_INIT;
  84 static const char *curl_proxyuserpwd;
  85 static const char *curl_cookie_file;
  86 static int curl_save_cookies;
  87 struct credential http_auth = CREDENTIAL_INIT;
  88 static int http_proactive_auth;
  89 static const char *user_agent;
  90
  91 #if LIBCURL_VERSION_NUM >= 0x071700
  92 /* Use CURLOPT_KEYPASSWD as is */
  93 #elif LIBCURL_VERSION_NUM >= 0x070903
  94 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
  95 #else
  96 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
  97 #endif
  98
  99 static struct credential cert_auth = CREDENTIAL_INIT;
 100 static int ssl_cert_password_required;
 101 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 102 static unsigned long http_auth_methods = CURLAUTH_ANY;
 103 #endif
 104
 105 static struct curl_slist *pragma_header;
 106 static struct curl_slist *no_pragma_header;
 107
 108 static struct active_request_slot *active_queue_head;
 109
 110 static char *cached_accept_language;
 111
 112 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
 113 {
 114         size_t size = eltsize * nmemb;
 115         struct buffer *buffer = buffer_;
 116
 117         if (size > buffer->buf.len - buffer->posn)
 118                 size = buffer->buf.len - buffer->posn;
 119         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
 120         buffer->posn += size;
 121
 122         return size;
 123 }
 124
 125 #ifndef NO_CURL_IOCTL
 126 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
 127 {
 128         struct buffer *buffer = clientp;
 129
 130         switch (cmd) {
 131         case CURLIOCMD_NOP:
 132                 return CURLIOE_OK;
 133
 134         case CURLIOCMD_RESTARTREAD:
 135                 buffer->posn = 0;
 136                 return CURLIOE_OK;
 137
 138         default:
 139                 return CURLIOE_UNKNOWNCMD;
 140         }
 141 }
 142 #endif
 143
 144 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
 145 {
 146         size_t size = eltsize * nmemb;
 147         struct strbuf *buffer = buffer_;
 148
 149         strbuf_add(buffer, ptr, size);
 150         return size;
 151 }
 152
 153 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 154 {
 155         return eltsize * nmemb;
 156 }
 157
 158 static void closedown_active_slot(struct active_request_slot *slot)
 159 {
 160         active_requests--;
 161         slot->in_use = 0;
 162 }
 163
 164 static void finish_active_slot(struct active_request_slot *slot)
 165 {
 166         closedown_active_slot(slot);
 167         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
 168
 169         if (slot->finished != NULL)
 170                 (*slot->finished) = 1;
 171
 172         /* Store slot results so they can be read after the slot is reused */
 173         if (slot->results != NULL) {
 174                 slot->results->curl_result = slot->curl_result;
 175                 slot->results->http_code = slot->http_code;
 176 #if LIBCURL_VERSION_NUM >= 0x070a08
 177                 curl_easy_getinfo(slot->curl, CURLINFO_HTTPAUTH_AVAIL,
 178                                   &slot->results->auth_avail);
 179 #else
 180                 slot->results->auth_avail = 0;
 181 #endif
 182
 183                 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CONNECTCODE,
 184                         &slot->results->http_connectcode);
 185         }
 186
 187         /* Run callback if appropriate */
 188         if (slot->callback_func != NULL)
 189                 slot->callback_func(slot->callback_data);
 190 }
 191
 192 #ifdef USE_CURL_MULTI
 193 static void process_curl_messages(void)
 194 {
 195         int num_messages;
 196         struct active_request_slot *slot;
 197         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
 198
 199         while (curl_message != NULL) {
 200                 if (curl_message->msg == CURLMSG_DONE) {
 201                         int curl_result = curl_message->data.result;
 202                         slot = active_queue_head;
 203                         while (slot != NULL &&
 204                                slot->curl != curl_message->easy_handle)
 205                                 slot = slot->next;
 206                         if (slot != NULL) {
 207                                 curl_multi_remove_handle(curlm, slot->curl);
 208                                 slot->curl_result = curl_result;
 209                                 finish_active_slot(slot);
 210                         } else {
 211                                 fprintf(stderr, "Received DONE message for unknown request!\n");
 212                         }
 213                 } else {
 214                         fprintf(stderr, "Unknown CURL message received: %d\n",
 215                                 (int)curl_message->msg);
 216                 }
 217                 curl_message = curl_multi_info_read(curlm, &num_messages);
 218         }
 219 }
 220 #endif
 221
 222 static int http_options(const char *var, const char *value, void *cb)
 223 {
 224         if (!strcmp("http.sslverify", var)) {
 225                 curl_ssl_verify = git_config_bool(var, value);
 226                 return 0;
 227         }
 228         if (!strcmp("http.sslcipherlist", var))
 229                 return git_config_string(&ssl_cipherlist, var, value);
 230         if (!strcmp("http.sslversion", var))
 231                 return git_config_string(&ssl_version, var, value);
 232         if (!strcmp("http.sslcert", var))
 233                 return git_config_string(&ssl_cert, var, value);
 234 #if LIBCURL_VERSION_NUM >= 0x070903
 235         if (!strcmp("http.sslkey", var))
 236                 return git_config_string(&ssl_key, var, value);
 237 #endif
 238 #if LIBCURL_VERSION_NUM >= 0x070908
 239         if (!strcmp("http.sslcapath", var))
 240                 return git_config_pathname(&ssl_capath, var, value);
 241 #endif
 242         if (!strcmp("http.sslcainfo", var))
 243                 return git_config_pathname(&ssl_cainfo, var, value);
 244         if (!strcmp("http.sslcertpasswordprotected", var)) {
 245                 ssl_cert_password_required = git_config_bool(var, value);
 246                 return 0;
 247         }
 248         if (!strcmp("http.ssltry", var)) {
 249                 curl_ssl_try = git_config_bool(var, value);
 250                 return 0;
 251         }
 252         if (!strcmp("http.minsessions", var)) {
 253                 min_curl_sessions = git_config_int(var, value);
 254 #ifndef USE_CURL_MULTI
 255                 if (min_curl_sessions > 1)
 256                         min_curl_sessions = 1;
 257 #endif
 258                 return 0;
 259         }
 260 #ifdef USE_CURL_MULTI
 261         if (!strcmp("http.maxrequests", var)) {
 262                 max_requests = git_config_int(var, value);
 263                 return 0;
 264         }
 265 #endif
 266         if (!strcmp("http.lowspeedlimit", var)) {
 267                 curl_low_speed_limit = (long)git_config_int(var, value);
 268                 return 0;
 269         }
 270         if (!strcmp("http.lowspeedtime", var)) {
 271                 curl_low_speed_time = (long)git_config_int(var, value);
 272                 return 0;
 273         }
 274
 275         if (!strcmp("http.noepsv", var)) {
 276                 curl_ftp_no_epsv = git_config_bool(var, value);
 277                 return 0;
 278         }
 279         if (!strcmp("http.proxy", var))
 280                 return git_config_string(&curl_http_proxy, var, value);
 281
 282         if (!strcmp("http.proxyauthmethod", var))
 283                 return git_config_string(&http_proxy_authmethod, var, value);
 284
 285         if (!strcmp("http.cookiefile", var))
 286                 return git_config_string(&curl_cookie_file, var, value);
 287         if (!strcmp("http.savecookies", var)) {
 288                 curl_save_cookies = git_config_bool(var, value);
 289                 return 0;
 290         }
 291
 292         if (!strcmp("http.postbuffer", var)) {
 293                 http_post_buffer = git_config_int(var, value);
 294                 if (http_post_buffer < LARGE_PACKET_MAX)
 295                         http_post_buffer = LARGE_PACKET_MAX;
 296                 return 0;
 297         }
 298
 299         if (!strcmp("http.useragent", var))
 300                 return git_config_string(&user_agent, var, value);
 301
 302         /* Fall back on the default ones */
 303         return git_default_config(var, value, cb);
 304 }
 305
 306 static void init_curl_http_auth(CURL *result)
 307 {
 308         if (!http_auth.username)
 309                 return;
 310
 311         credential_fill(&http_auth);
 312
 313 #if LIBCURL_VERSION_NUM >= 0x071301
 314         curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
 315         curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
 316 #else
 317         {
 318                 static struct strbuf up = STRBUF_INIT;
 319                 /*
 320                  * Note that we assume we only ever have a single set of
 321                  * credentials in a given program run, so we do not have
 322                  * to worry about updating this buffer, only setting its
 323                  * initial value.
 324                  */
 325                 if (!up.len)
 326                         strbuf_addf(&up, "%s:%s",
 327                                 http_auth.username, http_auth.password);
 328                 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
 329         }
 330 #endif
 331 }
 332
 333 /* *var must be free-able */
 334 static void var_override(const char **var, char *value)
 335 {
 336         if (value) {
 337                 free((void *)*var);
 338                 *var = xstrdup(value);
 339         }
 340 }
 341
 342 static void set_proxyauth_name_password(CURL *result)
 343 {
 344 #if LIBCURL_VERSION_NUM >= 0x071301
 345                 curl_easy_setopt(result, CURLOPT_PROXYUSERNAME,
 346                         proxy_auth.username);
 347                 curl_easy_setopt(result, CURLOPT_PROXYPASSWORD,
 348                         proxy_auth.password);
 349 #else
 350                 struct strbuf s = STRBUF_INIT;
 351
 352                 strbuf_addstr_urlencode(&s, proxy_auth.username, 1);
 353                 strbuf_addch(&s, ':');
 354                 strbuf_addstr_urlencode(&s, proxy_auth.password, 1);
 355                 curl_proxyuserpwd = strbuf_detach(&s, NULL);
 356                 curl_easy_setopt(result, CURLOPT_PROXYUSERPWD, curl_proxyuserpwd);
 357 #endif
 358 }
 359
 360 static void init_curl_proxy_auth(CURL *result)
 361 {
 362         if (proxy_auth.username) {
 363                 if (!proxy_auth.password)
 364                         credential_fill(&proxy_auth);
 365                 set_proxyauth_name_password(result);
 366         }
 367
 368         var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
 369
 370 #if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
 371         if (http_proxy_authmethod) {
 372                 int i;
 373                 for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
 374                         if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
 375                                 curl_easy_setopt(result, CURLOPT_PROXYAUTH,
 376                                                 proxy_authmethods[i].curlauth_param);
 377                                 break;
 378                         }
 379                 }
 380                 if (i == ARRAY_SIZE(proxy_authmethods)) {
 381                         warning("unsupported proxy authentication method %s: using anyauth",
 382                                         http_proxy_authmethod);
 383                         curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 384                 }
 385         }
 386         else
 387                 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
 388 #endif
 389 }
 390
 391 static int has_cert_password(void)
 392 {
 393         if (ssl_cert == NULL || ssl_cert_password_required != 1)
 394                 return 0;
 395         if (!cert_auth.password) {
 396                 cert_auth.protocol = xstrdup("cert");
 397                 cert_auth.username = xstrdup("");
 398                 cert_auth.path = xstrdup(ssl_cert);
 399                 credential_fill(&cert_auth);
 400         }
 401         return 1;
 402 }
 403
 404 #if LIBCURL_VERSION_NUM >= 0x071900
 405 static void set_curl_keepalive(CURL *c)
 406 {
 407         curl_easy_setopt(c, CURLOPT_TCP_KEEPALIVE, 1);
 408 }
 409
 410 #elif LIBCURL_VERSION_NUM >= 0x071000
 411 static int sockopt_callback(void *client, curl_socket_t fd, curlsocktype type)
 412 {
 413         int ka = 1;
 414         int rc;
 415         socklen_t len = (socklen_t)sizeof(ka);
 416
 417         if (type != CURLSOCKTYPE_IPCXN)
 418                 return 0;
 419
 420         rc = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&ka, len);
 421         if (rc < 0)
 422                 warning("unable to set SO_KEEPALIVE on socket %s",
 423                         strerror(errno));
 424
 425         return 0; /* CURL_SOCKOPT_OK only exists since curl 7.21.5 */
 426 }
 427
 428 static void set_curl_keepalive(CURL *c)
 429 {
 430         curl_easy_setopt(c, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
 431 }
 432
 433 #else
 434 static void set_curl_keepalive(CURL *c)
 435 {
 436         /* not supported on older curl versions */
 437 }
 438 #endif
 439
 440 static CURL *get_curl_handle(void)
 441 {
 442         CURL *result = curl_easy_init();
 443         long allowed_protocols = 0;
 444
 445         if (!result)
 446                 die("curl_easy_init failed");
 447
 448         if (!curl_ssl_verify) {
 449                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
 450                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
 451         } else {
 452                 /* Verify authenticity of the peer's certificate */
 453                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
 454                 /* The name in the cert must match whom we tried to connect */
 455                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 456         }
 457
 458 #if LIBCURL_VERSION_NUM >= 0x070907
 459         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 460 #endif
 461 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 462         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 463 #endif
 464
 465         if (http_proactive_auth)
 466                 init_curl_http_auth(result);
 467
 468         if (getenv("GIT_SSL_VERSION"))
 469                 ssl_version = getenv("GIT_SSL_VERSION");
 470         if (ssl_version && *ssl_version) {
 471                 int i;
 472                 for (i = 0; i < ARRAY_SIZE(sslversions); i++) {
 473                         if (!strcmp(ssl_version, sslversions[i].name)) {
 474                                 curl_easy_setopt(result, CURLOPT_SSLVERSION,
 475                                                  sslversions[i].ssl_version);
 476                                 break;
 477                         }
 478                 }
 479                 if (i == ARRAY_SIZE(sslversions))
 480                         warning("unsupported ssl version %s: using default",
 481                                 ssl_version);
 482         }
 483
 484         if (getenv("GIT_SSL_CIPHER_LIST"))
 485                 ssl_cipherlist = getenv("GIT_SSL_CIPHER_LIST");
 486         if (ssl_cipherlist != NULL && *ssl_cipherlist)
 487                 curl_easy_setopt(result, CURLOPT_SSL_CIPHER_LIST,
 488                                 ssl_cipherlist);
 489
 490         if (ssl_cert != NULL)
 491                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
 492         if (has_cert_password())
 493                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
 494 #if LIBCURL_VERSION_NUM >= 0x070903
 495         if (ssl_key != NULL)
 496                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 497 #endif
 498 #if LIBCURL_VERSION_NUM >= 0x070908
 499         if (ssl_capath != NULL)
 500                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
 501 #endif
 502         if (ssl_cainfo != NULL)
 503                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
 504
 505         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
 506                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
 507                                  curl_low_speed_limit);
 508                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
 509                                  curl_low_speed_time);
 510         }
 511
 512         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
 513         curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
 514 #if LIBCURL_VERSION_NUM >= 0x071301
 515         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 516 #elif LIBCURL_VERSION_NUM >= 0x071101
 517         curl_easy_setopt(result, CURLOPT_POST301, 1);
 518 #endif
 519 #if LIBCURL_VERSION_NUM >= 0x071304
 520         if (is_transport_allowed("http"))
 521                 allowed_protocols |= CURLPROTO_HTTP;
 522         if (is_transport_allowed("https"))
 523                 allowed_protocols |= CURLPROTO_HTTPS;
 524         if (is_transport_allowed("ftp"))
 525                 allowed_protocols |= CURLPROTO_FTP;
 526         if (is_transport_allowed("ftps"))
 527                 allowed_protocols |= CURLPROTO_FTPS;
 528         curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS, allowed_protocols);
 529 #else
 530         if (transport_restrict_protocols())
 531                 warning("protocol restrictions not applied to curl redirects because\n"
 532                         "your curl version is too old (>= 7.19.4)");
 533 #endif
 534
 535         if (getenv("GIT_CURL_VERBOSE"))
 536                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
 537
 538         curl_easy_setopt(result, CURLOPT_USERAGENT,
 539                 user_agent ? user_agent : git_user_agent());
 540
 541         if (curl_ftp_no_epsv)
 542                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 543
 544 #ifdef CURLOPT_USE_SSL
 545         if (curl_ssl_try)
 546                 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
 547 #endif
 548
 549         /*
 550          * CURL also examines these variables as a fallback; but we need to query
 551          * them here in order to decide whether to prompt for missing password (cf.
 552          * init_curl_proxy_auth()).
 553          *
 554          * Unlike many other common environment variables, these are historically
 555          * lowercase only. It appears that CURL did not know this and implemented
 556          * only uppercase variants, which was later corrected to take both - with
 557          * the exception of http_proxy, which is lowercase only also in CURL. As
 558          * the lowercase versions are the historical quasi-standard, they take
 559          * precedence here, as in CURL.
 560          */
 561         if (!curl_http_proxy) {
 562                 if (!strcmp(http_auth.protocol, "https")) {
 563                         var_override(&curl_http_proxy, getenv("HTTPS_PROXY"));
 564                         var_override(&curl_http_proxy, getenv("https_proxy"));
 565                 } else {
 566                         var_override(&curl_http_proxy, getenv("http_proxy"));
 567                 }
 568                 if (!curl_http_proxy) {
 569                         var_override(&curl_http_proxy, getenv("ALL_PROXY"));
 570                         var_override(&curl_http_proxy, getenv("all_proxy"));
 571                 }
 572         }
 573
 574         if (curl_http_proxy) {
 575                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
 576 #if LIBCURL_VERSION_NUM >= 0x071800
 577                 if (starts_with(curl_http_proxy, "socks5"))
 578                         curl_easy_setopt(result,
 579                                 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
 580                 else if (starts_with(curl_http_proxy, "socks4a"))
 581                         curl_easy_setopt(result,
 582                                 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
 583                 else if (starts_with(curl_http_proxy, "socks"))
 584                         curl_easy_setopt(result,
 585                                 CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
 586 #endif
 587                 if (strstr(curl_http_proxy, "://"))
 588                         credential_from_url(&proxy_auth, curl_http_proxy);
 589                 else {
 590                         struct strbuf url = STRBUF_INIT;
 591                         strbuf_addf(&url, "http://%s", curl_http_proxy);
 592                         credential_from_url(&proxy_auth, url.buf);
 593                         strbuf_release(&url);
 594                 }
 595
 596                 curl_easy_setopt(result, CURLOPT_PROXY, proxy_auth.host);
 597         }
 598         init_curl_proxy_auth(result);
 599
 600         set_curl_keepalive(result);
 601
 602         return result;
 603 }
 604
 605 static void set_from_env(const char **var, const char *envname)
 606 {
 607         const char *val = getenv(envname);
 608         if (val)
 609                 *var = val;
 610 }
 611
 612 void http_init(struct remote *remote, const char *url, int proactive_auth)
 613 {
 614         char *low_speed_limit;
 615         char *low_speed_time;
 616         char *normalized_url;
 617         struct urlmatch_config config = { STRING_LIST_INIT_DUP };
 618
 619         config.section = "http";
 620         config.key = NULL;
 621         config.collect_fn = http_options;
 622         config.cascade_fn = git_default_config;
 623         config.cb = NULL;
 624
 625         http_is_verbose = 0;
 626         normalized_url = url_normalize(url, &config.url);
 627
 628         git_config(urlmatch_config_entry, &config);
 629         free(normalized_url);
 630
 631         if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
 632                 die("curl_global_init failed");
 633
 634         http_proactive_auth = proactive_auth;
 635
 636         if (remote && remote->http_proxy)
 637                 curl_http_proxy = xstrdup(remote->http_proxy);
 638
 639         if (remote)
 640                 var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
 641
 642         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
 643         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
 644
 645 #ifdef USE_CURL_MULTI
 646         {
 647                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
 648                 if (http_max_requests != NULL)
 649                         max_requests = atoi(http_max_requests);
 650         }
 651
 652         curlm = curl_multi_init();
 653         if (!curlm)
 654                 die("curl_multi_init failed");
 655 #endif
 656
 657         if (getenv("GIT_SSL_NO_VERIFY"))
 658                 curl_ssl_verify = 0;
 659
 660         set_from_env(&ssl_cert, "GIT_SSL_CERT");
 661 #if LIBCURL_VERSION_NUM >= 0x070903
 662         set_from_env(&ssl_key, "GIT_SSL_KEY");
 663 #endif
 664 #if LIBCURL_VERSION_NUM >= 0x070908
 665         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 666 #endif
 667         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
 668
 669         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
 670
 671         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
 672         if (low_speed_limit != NULL)
 673                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
 674         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
 675         if (low_speed_time != NULL)
 676                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
 677
 678         if (curl_ssl_verify == -1)
 679                 curl_ssl_verify = 1;
 680
 681         curl_session_count = 0;
 682 #ifdef USE_CURL_MULTI
 683         if (max_requests < 1)
 684                 max_requests = DEFAULT_MAX_REQUESTS;
 685 #endif
 686
 687         if (getenv("GIT_CURL_FTP_NO_EPSV"))
 688                 curl_ftp_no_epsv = 1;
 689
 690         if (url) {
 691                 credential_from_url(&http_auth, url);
 692                 if (!ssl_cert_password_required &&
 693                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
 694                     starts_with(url, "https://"))
 695                         ssl_cert_password_required = 1;
 696         }
 697
 698 #ifndef NO_CURL_EASY_DUPHANDLE
 699         curl_default = get_curl_handle();
 700 #endif
 701 }
 702
 703 void http_cleanup(void)
 704 {
 705         struct active_request_slot *slot = active_queue_head;
 706
 707         while (slot != NULL) {
 708                 struct active_request_slot *next = slot->next;
 709                 if (slot->curl != NULL) {
 710 #ifdef USE_CURL_MULTI
 711                         curl_multi_remove_handle(curlm, slot->curl);
 712 #endif
 713                         curl_easy_cleanup(slot->curl);
 714                 }
 715                 free(slot);
 716                 slot = next;
 717         }
 718         active_queue_head = NULL;
 719
 720 #ifndef NO_CURL_EASY_DUPHANDLE
 721         curl_easy_cleanup(curl_default);
 722 #endif
 723
 724 #ifdef USE_CURL_MULTI
 725         curl_multi_cleanup(curlm);
 726 #endif
 727         curl_global_cleanup();
 728
 729         curl_slist_free_all(pragma_header);
 730         pragma_header = NULL;
 731
 732         curl_slist_free_all(no_pragma_header);
 733         no_pragma_header = NULL;
 734
 735         if (curl_http_proxy) {
 736                 free((void *)curl_http_proxy);
 737                 curl_http_proxy = NULL;
 738         }
 739
 740         if (proxy_auth.password) {
 741                 memset(proxy_auth.password, 0, strlen(proxy_auth.password));
 742                 free(proxy_auth.password);
 743                 proxy_auth.password = NULL;
 744         }
 745
 746         free((void *)curl_proxyuserpwd);
 747         curl_proxyuserpwd = NULL;
 748
 749         free((void *)http_proxy_authmethod);
 750         http_proxy_authmethod = NULL;
 751
 752         if (cert_auth.password != NULL) {
 753                 memset(cert_auth.password, 0, strlen(cert_auth.password));
 754                 free(cert_auth.password);
 755                 cert_auth.password = NULL;
 756         }
 757         ssl_cert_password_required = 0;
 758
 759         free(cached_accept_language);
 760         cached_accept_language = NULL;
 761 }
 762
 763 struct active_request_slot *get_active_slot(void)
 764 {
 765         struct active_request_slot *slot = active_queue_head;
 766         struct active_request_slot *newslot;
 767
 768 #ifdef USE_CURL_MULTI
 769         int num_transfers;
 770
 771         /* Wait for a slot to open up if the queue is full */
 772         while (active_requests >= max_requests) {
 773                 curl_multi_perform(curlm, &num_transfers);
 774                 if (num_transfers < active_requests)
 775                         process_curl_messages();
 776         }
 777 #endif
 778
 779         while (slot != NULL && slot->in_use)
 780                 slot = slot->next;
 781
 782         if (slot == NULL) {
 783                 newslot = xmalloc(sizeof(*newslot));
 784                 newslot->curl = NULL;
 785                 newslot->in_use = 0;
 786                 newslot->next = NULL;
 787
 788                 slot = active_queue_head;
 789                 if (slot == NULL) {
 790                         active_queue_head = newslot;
 791                 } else {
 792                         while (slot->next != NULL)
 793                                 slot = slot->next;
 794                         slot->next = newslot;
 795                 }
 796                 slot = newslot;
 797         }
 798
 799         if (slot->curl == NULL) {
 800 #ifdef NO_CURL_EASY_DUPHANDLE
 801                 slot->curl = get_curl_handle();
 802 #else
 803                 slot->curl = curl_easy_duphandle(curl_default);
 804 #endif
 805                 curl_session_count++;
 806         }
 807
 808         active_requests++;
 809         slot->in_use = 1;
 810         slot->results = NULL;
 811         slot->finished = NULL;
 812         slot->callback_data = NULL;
 813         slot->callback_func = NULL;
 814         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
 815         if (curl_save_cookies)
 816                 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
 817         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
 818         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 819         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 820         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 821         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
 822         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 823         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 824         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 825         curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
 826         curl_easy_setopt(slot->curl, CURLOPT_RANGE, NULL);
 827 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
 828         curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
 829 #endif
 830         if (http_auth.password)
 831                 init_curl_http_auth(slot->curl);
 832
 833         return slot;
 834 }
 835
 836 int start_active_slot(struct active_request_slot *slot)
 837 {
 838 #ifdef USE_CURL_MULTI
 839         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
 840         int num_transfers;
 841
 842         if (curlm_result != CURLM_OK &&
 843             curlm_result != CURLM_CALL_MULTI_PERFORM) {
 844                 active_requests--;
 845                 slot->in_use = 0;
 846                 return 0;
 847         }
 848
 849         /*
 850          * We know there must be something to do, since we just added
 851          * something.
 852          */
 853         curl_multi_perform(curlm, &num_transfers);
 854 #endif
 855         return 1;
 856 }
 857
 858 #ifdef USE_CURL_MULTI
 859 struct fill_chain {
 860         void *data;
 861         int (*fill)(void *);
 862         struct fill_chain *next;
 863 };
 864
 865 static struct fill_chain *fill_cfg;
 866
 867 void add_fill_function(void *data, int (*fill)(void *))
 868 {
 869         struct fill_chain *new = xmalloc(sizeof(*new));
 870         struct fill_chain **linkp = &fill_cfg;
 871         new->data = data;
 872         new->fill = fill;
 873         new->next = NULL;
 874         while (*linkp)
 875                 linkp = &(*linkp)->next;
 876         *linkp = new;
 877 }
 878
 879 void fill_active_slots(void)
 880 {
 881         struct active_request_slot *slot = active_queue_head;
 882
 883         while (active_requests < max_requests) {
 884                 struct fill_chain *fill;
 885                 for (fill = fill_cfg; fill; fill = fill->next)
 886                         if (fill->fill(fill->data))
 887                                 break;
 888
 889                 if (!fill)
 890                         break;
 891         }
 892
 893         while (slot != NULL) {
 894                 if (!slot->in_use && slot->curl != NULL
 895                         && curl_session_count > min_curl_sessions) {
 896                         curl_easy_cleanup(slot->curl);
 897                         slot->curl = NULL;
 898                         curl_session_count--;
 899                 }
 900                 slot = slot->next;
 901         }
 902 }
 903
 904 void step_active_slots(void)
 905 {
 906         int num_transfers;
 907         CURLMcode curlm_result;
 908
 909         do {
 910                 curlm_result = curl_multi_perform(curlm, &num_transfers);
 911         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
 912         if (num_transfers < active_requests) {
 913                 process_curl_messages();
 914                 fill_active_slots();
 915         }
 916 }
 917 #endif
 918
 919 void run_active_slot(struct active_request_slot *slot)
 920 {
 921 #ifdef USE_CURL_MULTI
 922         fd_set readfds;
 923         fd_set writefds;
 924         fd_set excfds;
 925         int max_fd;
 926         struct timeval select_timeout;
 927         int finished = 0;
 928
 929         slot->finished = &finished;
 930         while (!finished) {
 931                 step_active_slots();
 932
 933                 if (slot->in_use) {
 934 #if LIBCURL_VERSION_NUM >= 0x070f04
 935                         long curl_timeout;
 936                         curl_multi_timeout(curlm, &curl_timeout);
 937                         if (curl_timeout == 0) {
 938                                 continue;
 939                         } else if (curl_timeout == -1) {
 940                                 select_timeout.tv_sec  = 0;
 941                                 select_timeout.tv_usec = 50000;
 942                         } else {
 943                                 select_timeout.tv_sec  =  curl_timeout / 1000;
 944                                 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
 945                         }
 946 #else
 947                         select_timeout.tv_sec  = 0;
 948                         select_timeout.tv_usec = 50000;
 949 #endif
 950
 951                         max_fd = -1;
 952                         FD_ZERO(&readfds);
 953                         FD_ZERO(&writefds);
 954                         FD_ZERO(&excfds);
 955                         curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
 956
 957                         /*
 958                          * It can happen that curl_multi_timeout returns a pathologically
 959                          * long timeout when curl_multi_fdset returns no file descriptors
 960                          * to read.  See commit message for more details.
 961                          */
 962                         if (max_fd < 0 &&
 963                             (select_timeout.tv_sec > 0 ||
 964                              select_timeout.tv_usec > 50000)) {
 965                                 select_timeout.tv_sec  = 0;
 966                                 select_timeout.tv_usec = 50000;
 967                         }
 968
 969                         select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
 970                 }
 971         }
 972 #else
 973         while (slot->in_use) {
 974                 slot->curl_result = curl_easy_perform(slot->curl);
 975                 finish_active_slot(slot);
 976         }
 977 #endif
 978 }
 979
 980 static void release_active_slot(struct active_request_slot *slot)
 981 {
 982         closedown_active_slot(slot);
 983         if (slot->curl && curl_session_count > min_curl_sessions) {
 984 #ifdef USE_CURL_MULTI
 985                 curl_multi_remove_handle(curlm, slot->curl);
 986 #endif
 987                 curl_easy_cleanup(slot->curl);
 988                 slot->curl = NULL;
 989                 curl_session_count--;
 990         }
 991 #ifdef USE_CURL_MULTI
 992         fill_active_slots();
 993 #endif
 994 }
 995
 996 void finish_all_active_slots(void)
 997 {
 998         struct active_request_slot *slot = active_queue_head;
 999
1000         while (slot != NULL)
1001                 if (slot->in_use) {
1002                         run_active_slot(slot);
1003                         slot = active_queue_head;
1004                 } else {
1005                         slot = slot->next;
1006                 }
1007 }
1008
1009 /* Helpers for modifying and creating URLs */
1010 static inline int needs_quote(int ch)
1011 {
1012         if (((ch >= 'A') && (ch <= 'Z'))
1013                         || ((ch >= 'a') && (ch <= 'z'))
1014                         || ((ch >= '0') && (ch <= '9'))
1015                         || (ch == '/')
1016                         || (ch == '-')
1017                         || (ch == '.'))
1018                 return 0;
1019         return 1;
1020 }
1021
1022 static char *quote_ref_url(const char *base, const char *ref)
1023 {
1024         struct strbuf buf = STRBUF_INIT;
1025         const char *cp;
1026         int ch;
1027
1028         end_url_with_slash(&buf, base);
1029
1030         for (cp = ref; (ch = *cp) != 0; cp++)
1031                 if (needs_quote(ch))
1032                         strbuf_addf(&buf, "%%%02x", ch);
1033                 else
1034                         strbuf_addch(&buf, *cp);
1035
1036         return strbuf_detach(&buf, NULL);
1037 }
1038
1039 void append_remote_object_url(struct strbuf *buf, const char *url,
1040                               const char *hex,
1041                               int only_two_digit_prefix)
1042 {
1043         end_url_with_slash(buf, url);
1044
1045         strbuf_addf(buf, "objects/%.*s/", 2, hex);
1046         if (!only_two_digit_prefix)
1047                 strbuf_addf(buf, "%s", hex+2);
1048 }
1049
1050 char *get_remote_object_url(const char *url, const char *hex,
1051                             int only_two_digit_prefix)
1052 {
1053         struct strbuf buf = STRBUF_INIT;
1054         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
1055         return strbuf_detach(&buf, NULL);
1056 }
1057
1058 static int handle_curl_result(struct slot_results *results)
1059 {
1060         /*
1061          * If we see a failing http code with CURLE_OK, we have turned off
1062          * FAILONERROR (to keep the server's custom error response), and should
1063          * translate the code into failure here.
1064          */
1065         if (results->curl_result == CURLE_OK &&
1066             results->http_code >= 400) {
1067                 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
1068                 /*
1069                  * Normally curl will already have put the "reason phrase"
1070                  * from the server into curl_errorstr; unfortunately without
1071                  * FAILONERROR it is lost, so we can give only the numeric
1072                  * status code.
1073                  */
1074                 snprintf(curl_errorstr, sizeof(curl_errorstr),
1075                          "The requested URL returned error: %ld",
1076                          results->http_code);
1077         }
1078
1079         if (results->curl_result == CURLE_OK) {
1080                 credential_approve(&http_auth);
1081                 if (proxy_auth.password)
1082                         credential_approve(&proxy_auth);
1083                 return HTTP_OK;
1084         } else if (missing_target(results))
1085                 return HTTP_MISSING_TARGET;
1086         else if (results->http_code == 401) {
1087                 if (http_auth.username && http_auth.password) {
1088                         credential_reject(&http_auth);
1089                         return HTTP_NOAUTH;
1090                 } else {
1091 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
1092                         http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
1093 #endif
1094                         return HTTP_REAUTH;
1095                 }
1096         } else {
1097                 if (results->http_connectcode == 407)
1098                         credential_reject(&proxy_auth);
1099 #if LIBCURL_VERSION_NUM >= 0x070c00
1100                 if (!curl_errorstr[0])
1101                         strlcpy(curl_errorstr,
1102                                 curl_easy_strerror(results->curl_result),
1103                                 sizeof(curl_errorstr));
1104 #endif
1105                 return HTTP_ERROR;
1106         }
1107 }
1108
1109 int run_one_slot(struct active_request_slot *slot,
1110                  struct slot_results *results)
1111 {
1112         slot->results = results;
1113         if (!start_active_slot(slot)) {
1114                 snprintf(curl_errorstr, sizeof(curl_errorstr),
1115                          "failed to start HTTP request");
1116                 return HTTP_START_FAILED;
1117         }
1118
1119         run_active_slot(slot);
1120         return handle_curl_result(results);
1121 }
1122
1123 static CURLcode curlinfo_strbuf(CURL *curl, CURLINFO info, struct strbuf *buf)
1124 {
1125         char *ptr;
1126         CURLcode ret;
1127
1128         strbuf_reset(buf);
1129         ret = curl_easy_getinfo(curl, info, &ptr);
1130         if (!ret && ptr)
1131                 strbuf_addstr(buf, ptr);
1132         return ret;
1133 }
1134
1135 /*
1136  * Check for and extract a content-type parameter. "raw"
1137  * should be positioned at the start of the potential
1138  * parameter, with any whitespace already removed.
1139  *
1140  * "name" is the name of the parameter. The value is appended
1141  * to "out".
1142  */
1143 static int extract_param(const char *raw, const char *name,
1144                          struct strbuf *out)
1145 {
1146         size_t len = strlen(name);
1147
1148         if (strncasecmp(raw, name, len))
1149                 return -1;
1150         raw += len;
1151
1152         if (*raw != '=')
1153                 return -1;
1154         raw++;
1155
1156         while (*raw && !isspace(*raw) && *raw != ';')
1157                 strbuf_addch(out, *raw++);
1158         return 0;
1159 }
1160
1161 /*
1162  * Extract a normalized version of the content type, with any
1163  * spaces suppressed, all letters lowercased, and no trailing ";"
1164  * or parameters.
1165  *
1166  * Note that we will silently remove even invalid whitespace. For
1167  * example, "text / plain" is specifically forbidden by RFC 2616,
1168  * but "text/plain" is the only reasonable output, and this keeps
1169  * our code simple.
1170  *
1171  * If the "charset" argument is not NULL, store the value of any
1172  * charset parameter there.
1173  *
1174  * Example:
1175  *   "TEXT/PLAIN; charset=utf-8" -> "text/plain", "utf-8"
1176  *   "text / plain" -> "text/plain"
1177  */
1178 static void extract_content_type(struct strbuf *raw, struct strbuf *type,
1179                                  struct strbuf *charset)
1180 {
1181         const char *p;
1182
1183         strbuf_reset(type);
1184         strbuf_grow(type, raw->len);
1185         for (p = raw->buf; *p; p++) {
1186                 if (isspace(*p))
1187                         continue;
1188                 if (*p == ';') {
1189                         p++;
1190                         break;
1191                 }
1192                 strbuf_addch(type, tolower(*p));
1193         }
1194
1195         if (!charset)
1196                 return;
1197
1198         strbuf_reset(charset);
1199         while (*p) {
1200                 while (isspace(*p) || *p == ';')
1201                         p++;
1202                 if (!extract_param(p, "charset", charset))
1203                         return;
1204                 while (*p && !isspace(*p))
1205                         p++;
1206         }
1207
1208         if (!charset->len && starts_with(type->buf, "text/"))
1209                 strbuf_addstr(charset, "ISO-8859-1");
1210 }
1211
1212 static void write_accept_language(struct strbuf *buf)
1213 {
1214         /*
1215          * MAX_DECIMAL_PLACES must not be larger than 3. If it is larger than
1216          * that, q-value will be smaller than 0.001, the minimum q-value the
1217          * HTTP specification allows. See
1218          * http://tools.ietf.org/html/rfc7231#section-5.3.1 for q-value.
1219          */
1220         const int MAX_DECIMAL_PLACES = 3;
1221         const int MAX_LANGUAGE_TAGS = 1000;
1222         const int MAX_ACCEPT_LANGUAGE_HEADER_SIZE = 4000;
1223         char **language_tags = NULL;
1224         int num_langs = 0;
1225         const char *s = get_preferred_languages();
1226         int i;
1227         struct strbuf tag = STRBUF_INIT;
1228
1229         /* Don't add Accept-Language header if no language is preferred. */
1230         if (!s)
1231                 return;
1232
1233         /*
1234          * Split the colon-separated string of preferred languages into
1235          * language_tags array.
1236          */
1237         do {
1238                 /* collect language tag */
1239                 for (; *s && (isalnum(*s) || *s == '_'); s++)
1240                         strbuf_addch(&tag, *s == '_' ? '-' : *s);
1241
1242                 /* skip .codeset, @modifier and any other unnecessary parts */
1243                 while (*s && *s != ':')
1244                         s++;
1245
1246                 if (tag.len) {
1247                         num_langs++;
1248                         REALLOC_ARRAY(language_tags, num_langs);
1249                         language_tags[num_langs - 1] = strbuf_detach(&tag, NULL);
1250                         if (num_langs >= MAX_LANGUAGE_TAGS - 1) /* -1 for '*' */
1251                                 break;
1252                 }
1253         } while (*s++);
1254
1255         /* write Accept-Language header into buf */
1256         if (num_langs) {
1257                 int last_buf_len = 0;
1258                 int max_q;
1259                 int decimal_places;
1260                 char q_format[32];
1261
1262                 /* add '*' */
1263                 REALLOC_ARRAY(language_tags, num_langs + 1);
1264                 language_tags[num_langs++] = "*"; /* it's OK; this won't be freed */
1265
1266                 /* compute decimal_places */
1267                 for (max_q = 1, decimal_places = 0;
1268                      max_q < num_langs && decimal_places <= MAX_DECIMAL_PLACES;
1269                      decimal_places++, max_q *= 10)
1270                         ;
1271
1272                 xsnprintf(q_format, sizeof(q_format), ";q=0.%%0%dd", decimal_places);
1273
1274                 strbuf_addstr(buf, "Accept-Language: ");
1275
1276                 for (i = 0; i < num_langs; i++) {
1277                         if (i > 0)
1278                                 strbuf_addstr(buf, ", ");
1279
1280                         strbuf_addstr(buf, language_tags[i]);
1281
1282                         if (i > 0)
1283                                 strbuf_addf(buf, q_format, max_q - i);
1284
1285                         if (buf->len > MAX_ACCEPT_LANGUAGE_HEADER_SIZE) {
1286                                 strbuf_remove(buf, last_buf_len, buf->len - last_buf_len);
1287                                 break;
1288                         }
1289
1290                         last_buf_len = buf->len;
1291                 }
1292         }
1293
1294         /* free language tags -- last one is a static '*' */
1295         for (i = 0; i < num_langs - 1; i++)
1296                 free(language_tags[i]);
1297         free(language_tags);
1298 }
1299
1300 /*
1301  * Get an Accept-Language header which indicates user's preferred languages.
1302  *
1303  * Examples:
1304  *   LANGUAGE= -> ""
1305  *   LANGUAGE=ko:en -> "Accept-Language: ko, en; q=0.9, *; q=0.1"
1306  *   LANGUAGE=ko_KR.UTF-8:sr@latin -> "Accept-Language: ko-KR, sr; q=0.9, *; q=0.1"
1307  *   LANGUAGE=ko LANG=en_US.UTF-8 -> "Accept-Language: ko, *; q=0.1"
1308  *   LANGUAGE= LANG=en_US.UTF-8 -> "Accept-Language: en-US, *; q=0.1"
1309  *   LANGUAGE= LANG=C -> ""
1310  */
1311 static const char *get_accept_language(void)
1312 {
1313         if (!cached_accept_language) {
1314                 struct strbuf buf = STRBUF_INIT;
1315                 write_accept_language(&buf);
1316                 if (buf.len > 0)
1317                         cached_accept_language = strbuf_detach(&buf, NULL);
1318         }
1319
1320         return cached_accept_language;
1321 }
1322
1323 static void http_opt_request_remainder(CURL *curl, off_t pos)
1324 {
1325         char buf[128];
1326         xsnprintf(buf, sizeof(buf), "%"PRIuMAX"-", (uintmax_t)pos);
1327         curl_easy_setopt(curl, CURLOPT_RANGE, buf);
1328 }
1329
1330 /* http_request() targets */
1331 #define HTTP_REQUEST_STRBUF     0
1332 #define HTTP_REQUEST_FILE       1
1333
1334 static int http_request(const char *url,
1335                         void *result, int target,
1336                         const struct http_get_options *options)
1337 {
1338         struct active_request_slot *slot;
1339         struct slot_results results;
1340         struct curl_slist *headers = NULL;
1341         struct strbuf buf = STRBUF_INIT;
1342         const char *accept_language;
1343         int ret;
1344
1345         slot = get_active_slot();
1346         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1347
1348         if (result == NULL) {
1349                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1350         } else {
1351                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1352                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
1353
1354                 if (target == HTTP_REQUEST_FILE) {
1355                         off_t posn = ftello(result);
1356                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1357                                          fwrite);
1358                         if (posn > 0)
1359                                 http_opt_request_remainder(slot->curl, posn);
1360                 } else
1361                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
1362                                          fwrite_buffer);
1363         }
1364
1365         accept_language = get_accept_language();
1366
1367         if (accept_language)
1368                 headers = curl_slist_append(headers, accept_language);
1369
1370         strbuf_addstr(&buf, "Pragma:");
1371         if (options && options->no_cache)
1372                 strbuf_addstr(&buf, " no-cache");
1373         if (options && options->keep_error)
1374                 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
1375
1376         headers = curl_slist_append(headers, buf.buf);
1377
1378         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1379         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
1380         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
1381
1382         ret = run_one_slot(slot, &results);
1383
1384         if (options && options->content_type) {
1385                 struct strbuf raw = STRBUF_INIT;
1386                 curlinfo_strbuf(slot->curl, CURLINFO_CONTENT_TYPE, &raw);
1387                 extract_content_type(&raw, options->content_type,
1388                                      options->charset);
1389                 strbuf_release(&raw);
1390         }
1391
1392         if (options && options->effective_url)
1393                 curlinfo_strbuf(slot->curl, CURLINFO_EFFECTIVE_URL,
1394                                 options->effective_url);
1395
1396         curl_slist_free_all(headers);
1397         strbuf_release(&buf);
1398
1399         return ret;
1400 }
1401
1402 /*
1403  * Update the "base" url to a more appropriate value, as deduced by
1404  * redirects seen when requesting a URL starting with "url".
1405  *
1406  * The "asked" parameter is a URL that we asked curl to access, and must begin
1407  * with "base".
1408  *
1409  * The "got" parameter is the URL that curl reported to us as where we ended
1410  * up.
1411  *
1412  * Returns 1 if we updated the base url, 0 otherwise.
1413  *
1414  * Our basic strategy is to compare "base" and "asked" to find the bits
1415  * specific to our request. We then strip those bits off of "got" to yield the
1416  * new base. So for example, if our base is "http://example.com/foo.git",
1417  * and we ask for "http://example.com/foo.git/info/refs", we might end up
1418  * with "https://other.example.com/foo.git/info/refs". We would want the
1419  * new URL to become "https://other.example.com/foo.git".
1420  *
1421  * Note that this assumes a sane redirect scheme. It's entirely possible
1422  * in the example above to end up at a URL that does not even end in
1423  * "info/refs".  In such a case we simply punt, as there is not much we can
1424  * do (and such a scheme is unlikely to represent a real git repository,
1425  * which means we are likely about to abort anyway).
1426  */
1427 static int update_url_from_redirect(struct strbuf *base,
1428                                     const char *asked,
1429                                     const struct strbuf *got)
1430 {
1431         const char *tail;
1432         size_t tail_len;
1433
1434         if (!strcmp(asked, got->buf))
1435                 return 0;
1436
1437         if (!skip_prefix(asked, base->buf, &tail))
1438                 die("BUG: update_url_from_redirect: %s is not a superset of %s",
1439                     asked, base->buf);
1440
1441         tail_len = strlen(tail);
1442
1443         if (got->len < tail_len ||
1444             strcmp(tail, got->buf + got->len - tail_len))
1445                 return 0; /* insane redirect scheme */
1446
1447         strbuf_reset(base);
1448         strbuf_add(base, got->buf, got->len - tail_len);
1449         return 1;
1450 }
1451
1452 static int http_request_reauth(const char *url,
1453                                void *result, int target,
1454                                struct http_get_options *options)
1455 {
1456         int ret = http_request(url, result, target, options);
1457
1458         if (options && options->effective_url && options->base_url) {
1459                 if (update_url_from_redirect(options->base_url,
1460                                              url, options->effective_url)) {
1461                         credential_from_url(&http_auth, options->base_url->buf);
1462                         url = options->effective_url->buf;
1463                 }
1464         }
1465
1466         if (ret != HTTP_REAUTH)
1467                 return ret;
1468
1469         /*
1470          * If we are using KEEP_ERROR, the previous request may have
1471          * put cruft into our output stream; we should clear it out before
1472          * making our next request. We only know how to do this for
1473          * the strbuf case, but that is enough to satisfy current callers.
1474          */
1475         if (options && options->keep_error) {
1476                 switch (target) {
1477                 case HTTP_REQUEST_STRBUF:
1478                         strbuf_reset(result);
1479                         break;
1480                 default:
1481                         die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
1482                 }
1483         }
1484
1485         credential_fill(&http_auth);
1486
1487         return http_request(url, result, target, options);
1488 }
1489
1490 int http_get_strbuf(const char *url,
1491                     struct strbuf *result,
1492                     struct http_get_options *options)
1493 {
1494         return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
1495 }
1496
1497 /*
1498  * Downloads a URL and stores the result in the given file.
1499  *
1500  * If a previous interrupted download is detected (i.e. a previous temporary
1501  * file is still around) the download is resumed.
1502  */
1503 static int http_get_file(const char *url, const char *filename,
1504                          struct http_get_options *options)
1505 {
1506         int ret;
1507         struct strbuf tmpfile = STRBUF_INIT;
1508         FILE *result;
1509
1510         strbuf_addf(&tmpfile, "%s.temp", filename);
1511         result = fopen(tmpfile.buf, "a");
1512         if (!result) {
1513                 error("Unable to open local file %s", tmpfile.buf);
1514                 ret = HTTP_ERROR;
1515                 goto cleanup;
1516         }
1517
1518         ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
1519         fclose(result);
1520
1521         if (ret == HTTP_OK && finalize_object_file(tmpfile.buf, filename))
1522                 ret = HTTP_ERROR;
1523 cleanup:
1524         strbuf_release(&tmpfile);
1525         return ret;
1526 }
1527
1528 int http_fetch_ref(const char *base, struct ref *ref)
1529 {
1530         struct http_get_options options = {0};
1531         char *url;
1532         struct strbuf buffer = STRBUF_INIT;
1533         int ret = -1;
1534
1535         options.no_cache = 1;
1536
1537         url = quote_ref_url(base, ref->name);
1538         if (http_get_strbuf(url, &buffer, &options) == HTTP_OK) {
1539                 strbuf_rtrim(&buffer);
1540                 if (buffer.len == 40)
1541                         ret = get_oid_hex(buffer.buf, &ref->old_oid);
1542                 else if (starts_with(buffer.buf, "ref: ")) {
1543                         ref->symref = xstrdup(buffer.buf + 5);
1544                         ret = 0;
1545                 }
1546         }
1547
1548         strbuf_release(&buffer);
1549         free(url);
1550         return ret;
1551 }
1552
1553 /* Helpers for fetching packs */
1554 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
1555 {
1556         char *url, *tmp;
1557         struct strbuf buf = STRBUF_INIT;
1558
1559         if (http_is_verbose)
1560                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
1561
1562         end_url_with_slash(&buf, base_url);
1563         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1564         url = strbuf_detach(&buf, NULL);
1565
1566         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1567         tmp = strbuf_detach(&buf, NULL);
1568
1569         if (http_get_file(url, tmp, NULL) != HTTP_OK) {
1570                 error("Unable to get pack index %s", url);
1571                 free(tmp);
1572                 tmp = NULL;
1573         }
1574
1575         free(url);
1576         return tmp;
1577 }
1578
1579 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1580         unsigned char *sha1, const char *base_url)
1581 {
1582         struct packed_git *new_pack;
1583         char *tmp_idx = NULL;
1584         int ret;
1585
1586         if (has_pack_index(sha1)) {
1587                 new_pack = parse_pack_index(sha1, sha1_pack_index_name(sha1));
1588                 if (!new_pack)
1589                         return -1; /* parse_pack_index() already issued error message */
1590                 goto add_pack;
1591         }
1592
1593         tmp_idx = fetch_pack_index(sha1, base_url);
1594         if (!tmp_idx)
1595                 return -1;
1596
1597         new_pack = parse_pack_index(sha1, tmp_idx);
1598         if (!new_pack) {
1599                 unlink(tmp_idx);
1600                 free(tmp_idx);
1601
1602                 return -1; /* parse_pack_index() already issued error message */
1603         }
1604
1605         ret = verify_pack_index(new_pack);
1606         if (!ret) {
1607                 close_pack_index(new_pack);
1608                 ret = finalize_object_file(tmp_idx, sha1_pack_index_name(sha1));
1609         }
1610         free(tmp_idx);
1611         if (ret)
1612                 return -1;
1613
1614 add_pack:
1615         new_pack->next = *packs_head;
1616         *packs_head = new_pack;
1617         return 0;
1618 }
1619
1620 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1621 {
1622         struct http_get_options options = {0};
1623         int ret = 0, i = 0;
1624         char *url, *data;
1625         struct strbuf buf = STRBUF_INIT;
1626         unsigned char sha1[20];
1627
1628         end_url_with_slash(&buf, base_url);
1629         strbuf_addstr(&buf, "objects/info/packs");
1630         url = strbuf_detach(&buf, NULL);
1631
1632         options.no_cache = 1;
1633         ret = http_get_strbuf(url, &buf, &options);
1634         if (ret != HTTP_OK)
1635                 goto cleanup;
1636
1637         data = buf.buf;
1638         while (i < buf.len) {
1639                 switch (data[i]) {
1640                 case 'P':
1641                         i++;
1642                         if (i + 52 <= buf.len &&
1643                             starts_with(data + i, " pack-") &&
1644                             starts_with(data + i + 46, ".pack\n")) {
1645                                 get_sha1_hex(data + i + 6, sha1);
1646                                 fetch_and_setup_pack_index(packs_head, sha1,
1647                                                       base_url);
1648                                 i += 51;
1649                                 break;
1650                         }
1651                 default:
1652                         while (i < buf.len && data[i] != '\n')
1653                                 i++;
1654                 }
1655                 i++;
1656         }
1657
1658 cleanup:
1659         free(url);
1660         return ret;
1661 }
1662
1663 void release_http_pack_request(struct http_pack_request *preq)
1664 {
1665         if (preq->packfile != NULL) {
1666                 fclose(preq->packfile);
1667                 preq->packfile = NULL;
1668         }
1669         preq->slot = NULL;
1670         free(preq->url);
1671         free(preq);
1672 }
1673
1674 int finish_http_pack_request(struct http_pack_request *preq)
1675 {
1676         struct packed_git **lst;
1677         struct packed_git *p = preq->target;
1678         char *tmp_idx;
1679         size_t len;
1680         struct child_process ip = CHILD_PROCESS_INIT;
1681         const char *ip_argv[8];
1682
1683         close_pack_index(p);
1684
1685         fclose(preq->packfile);
1686         preq->packfile = NULL;
1687
1688         lst = preq->lst;
1689         while (*lst != p)
1690                 lst = &((*lst)->next);
1691         *lst = (*lst)->next;
1692
1693         if (!strip_suffix(preq->tmpfile, ".pack.temp", &len))
1694                 die("BUG: pack tmpfile does not end in .pack.temp?");
1695         tmp_idx = xstrfmt("%.*s.idx.temp", (int)len, preq->tmpfile);
1696
1697         ip_argv[0] = "index-pack";
1698         ip_argv[1] = "-o";
1699         ip_argv[2] = tmp_idx;
1700         ip_argv[3] = preq->tmpfile;
1701         ip_argv[4] = NULL;
1702
1703         ip.argv = ip_argv;
1704         ip.git_cmd = 1;
1705         ip.no_stdin = 1;
1706         ip.no_stdout = 1;
1707
1708         if (run_command(&ip)) {
1709                 unlink(preq->tmpfile);
1710                 unlink(tmp_idx);
1711                 free(tmp_idx);
1712                 return -1;
1713         }
1714
1715         unlink(sha1_pack_index_name(p->sha1));
1716
1717         if (finalize_object_file(preq->tmpfile, sha1_pack_name(p->sha1))
1718          || finalize_object_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1719                 free(tmp_idx);
1720                 return -1;
1721         }
1722
1723         install_packed_git(p);
1724         free(tmp_idx);
1725         return 0;
1726 }
1727
1728 struct http_pack_request *new_http_pack_request(
1729         struct packed_git *target, const char *base_url)
1730 {
1731         off_t prev_posn = 0;
1732         struct strbuf buf = STRBUF_INIT;
1733         struct http_pack_request *preq;
1734
1735         preq = xcalloc(1, sizeof(*preq));
1736         preq->target = target;
1737
1738         end_url_with_slash(&buf, base_url);
1739         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1740                 sha1_to_hex(target->sha1));
1741         preq->url = strbuf_detach(&buf, NULL);
1742
1743         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1744                 sha1_pack_name(target->sha1));
1745         preq->packfile = fopen(preq->tmpfile, "a");
1746         if (!preq->packfile) {
1747                 error("Unable to open local file %s for pack",
1748                       preq->tmpfile);
1749                 goto abort;
1750         }
1751
1752         preq->slot = get_active_slot();
1753         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1754         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1755         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1756         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1757                 no_pragma_header);
1758
1759         /*
1760          * If there is data present from a previous transfer attempt,
1761          * resume where it left off
1762          */
1763         prev_posn = ftello(preq->packfile);
1764         if (prev_posn>0) {
1765                 if (http_is_verbose)
1766                         fprintf(stderr,
1767                                 "Resuming fetch of pack %s at byte %"PRIuMAX"\n",
1768                                 sha1_to_hex(target->sha1), (uintmax_t)prev_posn);
1769                 http_opt_request_remainder(preq->slot->curl, prev_posn);
1770         }
1771
1772         return preq;
1773
1774 abort:
1775         free(preq->url);
1776         free(preq);
1777         return NULL;
1778 }
1779
1780 /* Helpers for fetching objects (loose) */
1781 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1782                                void *data)
1783 {
1784         unsigned char expn[4096];
1785         size_t size = eltsize * nmemb;
1786         int posn = 0;
1787         struct http_object_request *freq =
1788                 (struct http_object_request *)data;
1789         do {
1790                 ssize_t retval = xwrite(freq->localfile,
1791                                         (char *) ptr + posn, size - posn);
1792                 if (retval < 0)
1793                         return posn;
1794                 posn += retval;
1795         } while (posn < size);
1796
1797         freq->stream.avail_in = size;
1798         freq->stream.next_in = (void *)ptr;
1799         do {
1800                 freq->stream.next_out = expn;
1801                 freq->stream.avail_out = sizeof(expn);
1802                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1803                 git_SHA1_Update(&freq->c, expn,
1804                                 sizeof(expn) - freq->stream.avail_out);
1805         } while (freq->stream.avail_in && freq->zret == Z_OK);
1806         return size;
1807 }
1808
1809 struct http_object_request *new_http_object_request(const char *base_url,
1810         unsigned char *sha1)
1811 {
1812         char *hex = sha1_to_hex(sha1);
1813         const char *filename;
1814         char prevfile[PATH_MAX];
1815         int prevlocal;
1816         char prev_buf[PREV_BUF_SIZE];
1817         ssize_t prev_read = 0;
1818         off_t prev_posn = 0;
1819         struct http_object_request *freq;
1820
1821         freq = xcalloc(1, sizeof(*freq));
1822         hashcpy(freq->sha1, sha1);
1823         freq->localfile = -1;
1824
1825         filename = sha1_file_name(sha1);
1826         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1827                  "%s.temp", filename);
1828
1829         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1830         unlink_or_warn(prevfile);
1831         rename(freq->tmpfile, prevfile);
1832         unlink_or_warn(freq->tmpfile);
1833
1834         if (freq->localfile != -1)
1835                 error("fd leakage in start: %d", freq->localfile);
1836         freq->localfile = open(freq->tmpfile,
1837                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1838         /*
1839          * This could have failed due to the "lazy directory creation";
1840          * try to mkdir the last path component.
1841          */
1842         if (freq->localfile < 0 && errno == ENOENT) {
1843                 char *dir = strrchr(freq->tmpfile, '/');
1844                 if (dir) {
1845                         *dir = 0;
1846                         mkdir(freq->tmpfile, 0777);
1847                         *dir = '/';
1848                 }
1849                 freq->localfile = open(freq->tmpfile,
1850                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1851         }
1852
1853         if (freq->localfile < 0) {
1854                 error("Couldn't create temporary file %s: %s",
1855                       freq->tmpfile, strerror(errno));
1856                 goto abort;
1857         }
1858
1859         git_inflate_init(&freq->stream);
1860
1861         git_SHA1_Init(&freq->c);
1862
1863         freq->url = get_remote_object_url(base_url, hex, 0);
1864
1865         /*
1866          * If a previous temp file is present, process what was already
1867          * fetched.
1868          */
1869         prevlocal = open(prevfile, O_RDONLY);
1870         if (prevlocal != -1) {
1871                 do {
1872                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1873                         if (prev_read>0) {
1874                                 if (fwrite_sha1_file(prev_buf,
1875                                                      1,
1876                                                      prev_read,
1877                                                      freq) == prev_read) {
1878                                         prev_posn += prev_read;
1879                                 } else {
1880                                         prev_read = -1;
1881                                 }
1882                         }
1883                 } while (prev_read > 0);
1884                 close(prevlocal);
1885         }
1886         unlink_or_warn(prevfile);
1887
1888         /*
1889          * Reset inflate/SHA1 if there was an error reading the previous temp
1890          * file; also rewind to the beginning of the local file.
1891          */
1892         if (prev_read == -1) {
1893                 memset(&freq->stream, 0, sizeof(freq->stream));
1894                 git_inflate_init(&freq->stream);
1895                 git_SHA1_Init(&freq->c);
1896                 if (prev_posn>0) {
1897                         prev_posn = 0;
1898                         lseek(freq->localfile, 0, SEEK_SET);
1899                         if (ftruncate(freq->localfile, 0) < 0) {
1900                                 error("Couldn't truncate temporary file %s: %s",
1901                                           freq->tmpfile, strerror(errno));
1902                                 goto abort;
1903                         }
1904                 }
1905         }
1906
1907         freq->slot = get_active_slot();
1908
1909         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1910         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1911         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1912         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1913         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1914
1915         /*
1916          * If we have successfully processed data from a previous fetch
1917          * attempt, only fetch the data we don't already have.
1918          */
1919         if (prev_posn>0) {
1920                 if (http_is_verbose)
1921                         fprintf(stderr,
1922                                 "Resuming fetch of object %s at byte %"PRIuMAX"\n",
1923                                 hex, (uintmax_t)prev_posn);
1924                 http_opt_request_remainder(freq->slot->curl, prev_posn);
1925         }
1926
1927         return freq;
1928
1929 abort:
1930         free(freq->url);
1931         free(freq);
1932         return NULL;
1933 }
1934
1935 void process_http_object_request(struct http_object_request *freq)
1936 {
1937         if (freq->slot == NULL)
1938                 return;
1939         freq->curl_result = freq->slot->curl_result;
1940         freq->http_code = freq->slot->http_code;
1941         freq->slot = NULL;
1942 }
1943
1944 int finish_http_object_request(struct http_object_request *freq)
1945 {
1946         struct stat st;
1947
1948         close(freq->localfile);
1949         freq->localfile = -1;
1950
1951         process_http_object_request(freq);
1952
1953         if (freq->http_code == 416) {
1954                 warning("requested range invalid; we may already have all the data.");
1955         } else if (freq->curl_result != CURLE_OK) {
1956                 if (stat(freq->tmpfile, &st) == 0)
1957                         if (st.st_size == 0)
1958                                 unlink_or_warn(freq->tmpfile);
1959                 return -1;
1960         }
1961
1962         git_inflate_end(&freq->stream);
1963         git_SHA1_Final(freq->real_sha1, &freq->c);
1964         if (freq->zret != Z_STREAM_END) {
1965                 unlink_or_warn(freq->tmpfile);
1966                 return -1;
1967         }
1968         if (hashcmp(freq->sha1, freq->real_sha1)) {
1969                 unlink_or_warn(freq->tmpfile);
1970                 return -1;
1971         }
1972         freq->rename =
1973                 finalize_object_file(freq->tmpfile, sha1_file_name(freq->sha1));
1974
1975         return freq->rename;
1976 }
1977
1978 void abort_http_object_request(struct http_object_request *freq)
1979 {
1980         unlink_or_warn(freq->tmpfile);
1981
1982         release_http_object_request(freq);
1983 }
1984
1985 void release_http_object_request(struct http_object_request *freq)
1986 {
1987         if (freq->localfile != -1) {
1988                 close(freq->localfile);
1989                 freq->localfile = -1;
1990         }
1991         if (freq->url != NULL) {
1992                 free(freq->url);
1993                 freq->url = NULL;
1994         }
1995         if (freq->slot != NULL) {
1996                 freq->slot->callback_func = NULL;
1997                 freq->slot->callback_data = NULL;
1998                 release_active_slot(freq->slot);
1999                 freq->slot = NULL;
2000         }
2001 }