libsoup/soup-session.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * soup-session.c
   4  *
   5  * Copyright (C) 2000-2003, Ximian, Inc.
   6  */
   7
   8 #ifdef HAVE_CONFIG_H
   9 #include <config.h>
  10 #endif
  11
  12 #include <unistd.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15
  16 #include "soup-auth.h"
  17 #include "soup-session.h"
  18 #include "soup-connection.h"
  19 #include "soup-connection-ntlm.h"
  20 #include "soup-marshal.h"
  21 #include "soup-message-queue.h"
  22 #include "soup-ssl.h"
  23 #include "soup-uri.h"
  24
  25 typedef struct {
  26         SoupUri    *root_uri;
  27         guint       error;
  28
  29         GSList     *connections;      /* CONTAINS: SoupConnection */
  30         guint       num_conns;
  31
  32         GHashTable *auth_realms;      /* path -> scheme:realm */
  33         GHashTable *auths;            /* scheme:realm -> SoupAuth */
  34 } SoupSessionHost;
  35
  36 struct SoupSessionPrivate {
  37         SoupUri *proxy_uri;
  38         guint max_conns, max_conns_per_host;
  39         gboolean use_ntlm;
  40
  41         char *ssl_ca_file;
  42         gpointer ssl_creds;
  43
  44         SoupMessageQueue *queue;
  45
  46         GHashTable *hosts; /* SoupUri -> SoupSessionHost */
  47         GHashTable *conns; /* SoupConnection -> SoupSessionHost */
  48         guint num_conns;
  49
  50         SoupSessionHost *proxy_host;
  51 };
  52
  53 static guint    host_uri_hash  (gconstpointer key);
  54 static gboolean host_uri_equal (gconstpointer v1, gconstpointer v2);
  55 static void     free_host      (SoupSessionHost *host, SoupSession *session);
  56
  57 static gboolean run_queue (SoupSession *session, gboolean try_pruning);
  58
  59 #define SOUP_SESSION_MAX_CONNS_DEFAULT 10
  60 #define SOUP_SESSION_MAX_CONNS_PER_HOST_DEFAULT 4
  61
  62 #define PARENT_TYPE G_TYPE_OBJECT
  63 static GObjectClass *parent_class;
  64
  65 enum {
  66         AUTHENTICATE,
  67         REAUTHENTICATE,
  68         LAST_SIGNAL
  69 };
  70
  71 static guint signals[LAST_SIGNAL] = { 0 };
  72
  73 enum {
  74   PROP_0,
  75
  76   PROP_PROXY_URI,
  77   PROP_MAX_CONNS,
  78   PROP_MAX_CONNS_PER_HOST,
  79   PROP_USE_NTLM,
  80   PROP_SSL_CA_FILE,
  81
  82   LAST_PROP
  83 };
  84
  85 static void set_property (GObject *object, guint prop_id,
  86                           const GValue *value, GParamSpec *pspec);
  87 static void get_property (GObject *object, guint prop_id,
  88                           GValue *value, GParamSpec *pspec);
  89
  90 static void
  91 init (GObject *object)
  92 {
  93         SoupSession *session = SOUP_SESSION (object);
  94
  95         session->priv = g_new0 (SoupSessionPrivate, 1);
  96         session->priv->queue = soup_message_queue_new ();
  97         session->priv->hosts = g_hash_table_new (host_uri_hash,
  98                                                  host_uri_equal);
  99         session->priv->conns = g_hash_table_new (NULL, NULL);
 100
 101         session->priv->max_conns = SOUP_SESSION_MAX_CONNS_DEFAULT;
 102         session->priv->max_conns_per_host = SOUP_SESSION_MAX_CONNS_PER_HOST_DEFAULT;
 103 }
 104
 105 static gboolean
 106 foreach_free_host (gpointer key, gpointer host, gpointer session)
 107 {
 108         free_host (host, session);
 109         return TRUE;
 110 }
 111
 112 static void
 113 cleanup_hosts (SoupSession *session)
 114 {
 115         g_hash_table_foreach_remove (session->priv->hosts,
 116                                      foreach_free_host, session);
 117 }
 118
 119 static void
 120 dispose (GObject *object)
 121 {
 122         SoupSession *session = SOUP_SESSION (object);
 123
 124         soup_session_abort (session);
 125         cleanup_hosts (session);
 126
 127         G_OBJECT_CLASS (parent_class)->dispose (object);
 128 }
 129
 130 static void
 131 finalize (GObject *object)
 132 {
 133         SoupSession *session = SOUP_SESSION (object);
 134
 135         soup_message_queue_destroy (session->priv->queue);
 136         g_hash_table_destroy (session->priv->hosts);
 137         g_hash_table_destroy (session->priv->conns);
 138         g_free (session->priv);
 139
 140         G_OBJECT_CLASS (parent_class)->finalize (object);
 141 }
 142
 143 static void
 144 class_init (GObjectClass *object_class)
 145 {
 146         parent_class = g_type_class_ref (PARENT_TYPE);
 147
 148         /* virtual method override */
 149         object_class->dispose = dispose;
 150         object_class->finalize = finalize;
 151         object_class->set_property = set_property;
 152         object_class->get_property = get_property;
 153
 154         /* signals */
 155         signals[AUTHENTICATE] =
 156                 g_signal_new ("authenticate",
 157                               G_OBJECT_CLASS_TYPE (object_class),
 158                               G_SIGNAL_RUN_FIRST,
 159                               G_STRUCT_OFFSET (SoupSessionClass, authenticate),
 160                               NULL, NULL,
 161                               soup_marshal_NONE__OBJECT_STRING_STRING_POINTER_POINTER,
 162                               G_TYPE_NONE, 5,
 163                               SOUP_TYPE_MESSAGE,
 164                               G_TYPE_STRING,
 165                               G_TYPE_STRING,
 166                               G_TYPE_POINTER,
 167                               G_TYPE_POINTER);
 168         signals[REAUTHENTICATE] =
 169                 g_signal_new ("reauthenticate",
 170                               G_OBJECT_CLASS_TYPE (object_class),
 171                               G_SIGNAL_RUN_FIRST,
 172                               G_STRUCT_OFFSET (SoupSessionClass, reauthenticate),
 173                               NULL, NULL,
 174                               soup_marshal_NONE__OBJECT_STRING_STRING_POINTER_POINTER,
 175                               G_TYPE_NONE, 5,
 176                               SOUP_TYPE_MESSAGE,
 177                               G_TYPE_STRING,
 178                               G_TYPE_STRING,
 179                               G_TYPE_POINTER,
 180                               G_TYPE_POINTER);
 181
 182         /* properties */
 183         g_object_class_install_property (
 184                 object_class, PROP_PROXY_URI,
 185                 g_param_spec_pointer (SOUP_SESSION_PROXY_URI,
 186                                       "Proxy URI",
 187                                       "The HTTP Proxy to use for this session",
 188                                       G_PARAM_READWRITE));
 189         g_object_class_install_property (
 190                 object_class, PROP_MAX_CONNS,
 191                 g_param_spec_int (SOUP_SESSION_MAX_CONNS,
 192                                   "Max Connection Count",
 193                                   "The maximum number of connections that the session can open at once",
 194                                   1,
 195                                   G_MAXINT,
 196                                   10,
 197                                   G_PARAM_READWRITE));
 198         g_object_class_install_property (
 199                 object_class, PROP_MAX_CONNS_PER_HOST,
 200                 g_param_spec_int (SOUP_SESSION_MAX_CONNS_PER_HOST,
 201                                   "Max Per-Host Connection Count",
 202                                   "The maximum number of connections that the session can open at once to a given host",
 203                                   1,
 204                                   G_MAXINT,
 205                                   4,
 206                                   G_PARAM_READWRITE));
 207         g_object_class_install_property (
 208                 object_class, PROP_USE_NTLM,
 209                 g_param_spec_boolean (SOUP_SESSION_USE_NTLM,
 210                                       "Use NTLM",
 211                                       "Whether or not to use NTLM authentication",
 212                                       FALSE,
 213                                       G_PARAM_READWRITE));
 214         g_object_class_install_property (
 215                 object_class, PROP_SSL_CA_FILE,
 216                 g_param_spec_string (SOUP_SESSION_SSL_CA_FILE,
 217                                       "SSL CA file",
 218                                       "File containing SSL CA certificates",
 219                                       NULL,
 220                                       G_PARAM_READWRITE));
 221 }
 222
 223 SOUP_MAKE_TYPE (soup_session, SoupSession, class_init, init, PARENT_TYPE)
 224
 225 SoupSession *
 226 soup_session_new (void)
 227 {
 228         return g_object_new (SOUP_TYPE_SESSION, NULL);
 229 }
 230
 231 SoupSession *
 232 soup_session_new_with_options (const char *optname1, ...)
 233 {
 234         SoupSession *session;
 235         va_list ap;
 236
 237         va_start (ap, optname1);
 238         session = (SoupSession *)g_object_new_valist (SOUP_TYPE_SESSION, optname1, ap);
 239         va_end (ap);
 240
 241         return session;
 242 }
 243
 244 static void
 245 set_property (GObject *object, guint prop_id,
 246               const GValue *value, GParamSpec *pspec)
 247 {
 248         SoupSession *session = SOUP_SESSION (object);
 249         gpointer pval;
 250
 251         switch (prop_id) {
 252         case PROP_PROXY_URI:
 253                 if (session->priv->proxy_uri)
 254                         soup_uri_free (session->priv->proxy_uri);
 255                 pval = g_value_get_pointer (value);
 256                 session->priv->proxy_uri = pval ? soup_uri_copy (pval) : NULL;
 257
 258                 soup_session_abort (session);
 259                 cleanup_hosts (session);
 260                 break;
 261         case PROP_MAX_CONNS:
 262                 session->priv->max_conns = g_value_get_int (value);
 263                 break;
 264         case PROP_MAX_CONNS_PER_HOST:
 265                 session->priv->max_conns_per_host = g_value_get_int (value);
 266                 break;
 267         case PROP_USE_NTLM:
 268                 session->priv->use_ntlm = g_value_get_boolean (value);
 269                 break;
 270         case PROP_SSL_CA_FILE:
 271                 g_free (session->priv->ssl_ca_file);
 272                 session->priv->ssl_ca_file = g_strdup (g_value_get_string (value));
 273                 break;
 274         default:
 275                 break;
 276         }
 277 }
 278
 279 static void
 280 get_property (GObject *object, guint prop_id,
 281               GValue *value, GParamSpec *pspec)
 282 {
 283         SoupSession *session = SOUP_SESSION (object);
 284
 285         switch (prop_id) {
 286         case PROP_PROXY_URI:
 287                 g_value_set_pointer (value, session->priv->proxy_uri ?
 288                                      soup_uri_copy (session->priv->proxy_uri) :
 289                                      NULL);
 290                 break;
 291         case PROP_MAX_CONNS:
 292                 g_value_set_int (value, session->priv->max_conns);
 293                 break;
 294         case PROP_MAX_CONNS_PER_HOST:
 295                 g_value_set_int (value, session->priv->max_conns_per_host);
 296                 break;
 297         case PROP_USE_NTLM:
 298                 g_value_set_boolean (value, session->priv->use_ntlm);
 299                 break;
 300         case PROP_SSL_CA_FILE:
 301                 g_value_set_string (value, session->priv->ssl_ca_file);
 302                 break;
 303         default:
 304                 break;
 305         }
 306 }
 307
 308
 309 /* Hosts */
 310 static guint
 311 host_uri_hash (gconstpointer key)
 312 {
 313         const SoupUri *uri = key;
 314
 315         return (uri->protocol << 16) + uri->port + g_str_hash (uri->host);
 316 }
 317
 318 static gboolean
 319 host_uri_equal (gconstpointer v1, gconstpointer v2)
 320 {
 321         const SoupUri *one = v1;
 322         const SoupUri *two = v2;
 323
 324         if (one->protocol != two->protocol)
 325                 return FALSE;
 326         if (one->port != two->port)
 327                 return FALSE;
 328
 329         return strcmp (one->host, two->host) == 0;
 330 }
 331
 332 static SoupSessionHost *
 333 get_host_for_message (SoupSession *session, SoupMessage *msg)
 334 {
 335         SoupSessionHost *host;
 336         const SoupUri *source = soup_message_get_uri (msg);
 337
 338         host = g_hash_table_lookup (session->priv->hosts, source);
 339         if (host)
 340                 return host;
 341
 342         host = g_new0 (SoupSessionHost, 1);
 343         host->root_uri = soup_uri_copy_root (source);
 344
 345         g_hash_table_insert (session->priv->hosts, host->root_uri, host);
 346
 347         if (host->root_uri->protocol == SOUP_PROTOCOL_HTTPS &&
 348             !session->priv->ssl_creds) {
 349                 session->priv->ssl_creds =
 350                         soup_ssl_get_client_credentials (session->priv->ssl_ca_file);
 351         }
 352
 353         return host;
 354 }
 355
 356 static void
 357 free_realm (gpointer path, gpointer scheme_realm, gpointer data)
 358 {
 359         g_free (path);
 360         g_free (scheme_realm);
 361 }
 362
 363 static void
 364 free_auth (gpointer scheme_realm, gpointer auth, gpointer data)
 365 {
 366         g_free (scheme_realm);
 367         g_object_unref (auth);
 368 }
 369
 370 static void
 371 free_host (SoupSessionHost *host, SoupSession *session)
 372 {
 373         while (host->connections) {
 374                 SoupConnection *conn = host->connections->data;
 375
 376                 host->connections = g_slist_remove (host->connections, conn);
 377                 soup_connection_disconnect (conn);
 378         }
 379
 380         if (host->auth_realms) {
 381                 g_hash_table_foreach (host->auth_realms, free_realm, NULL);
 382                 g_hash_table_destroy (host->auth_realms);
 383         }
 384         if (host->auths) {
 385                 g_hash_table_foreach (host->auths, free_auth, NULL);
 386                 g_hash_table_destroy (host->auths);
 387         }
 388
 389         soup_uri_free (host->root_uri);
 390 }
 391
 392 /* Authentication */
 393
 394 static SoupAuth *
 395 lookup_auth (SoupSession *session, SoupMessage *msg, gboolean proxy)
 396 {
 397         SoupSessionHost *host;
 398         char *path, *dir;
 399         const char *realm, *const_path;
 400
 401         if (proxy) {
 402                 host = session->priv->proxy_host;
 403                 const_path = "/";
 404         } else {
 405                 host = get_host_for_message (session, msg);
 406                 const_path = soup_message_get_uri (msg)->path;
 407         }
 408         g_return_val_if_fail (host != NULL, NULL);
 409
 410         if (!host->auth_realms)
 411                 return NULL;
 412
 413         path = g_strdup (const_path);
 414         dir = path;
 415         do {
 416                 realm = g_hash_table_lookup (host->auth_realms, path);
 417                 if (realm)
 418                         break;
 419
 420                 dir = strrchr (path, '/');
 421                 if (dir)
 422                         *dir = '\0';
 423         } while (dir);
 424
 425         g_free (path);
 426         if (realm)
 427                 return g_hash_table_lookup (host->auths, realm);
 428         else
 429                 return NULL;
 430 }
 431
 432 static void
 433 invalidate_auth (SoupSessionHost *host, SoupAuth *auth)
 434 {
 435         char *realm;
 436         gpointer key, value;
 437
 438         realm = g_strdup_printf ("%s:%s",
 439                                  soup_auth_get_scheme_name (auth),
 440                                  soup_auth_get_realm (auth));
 441
 442         if (g_hash_table_lookup_extended (host->auths, realm, &key, &value) &&
 443             auth == (SoupAuth *)value) {
 444                 g_hash_table_remove (host->auths, realm);
 445                 g_free (key);
 446                 g_object_unref (auth);
 447         }
 448         g_free (realm);
 449 }
 450
 451 static gboolean
 452 authenticate_auth (SoupSession *session, SoupAuth *auth,
 453                    SoupMessage *msg, gboolean prior_auth_failed)
 454 {
 455         const SoupUri *uri = soup_message_get_uri (msg);
 456         char *username = NULL, *password = NULL;
 457
 458         if (uri->passwd && !prior_auth_failed) {
 459                 soup_auth_authenticate (auth, uri->user, uri->passwd);
 460                 return TRUE;
 461         }
 462
 463         g_signal_emit (session, signals[prior_auth_failed ? REAUTHENTICATE : AUTHENTICATE], 0,
 464                        msg, soup_auth_get_scheme_name (auth),
 465                        soup_auth_get_realm (auth),
 466                        &username, &password);
 467         if (username || password)
 468                 soup_auth_authenticate (auth, username, password);
 469         if (username)
 470                 g_free (username);
 471         if (password) {
 472                 memset (password, 0, strlen (password));
 473                 g_free (password);
 474         }
 475
 476         return soup_auth_is_authenticated (auth);
 477 }
 478
 479 static gboolean
 480 update_auth_internal (SoupSession *session, SoupMessage *msg,
 481                       const GSList *headers, gboolean proxy,
 482                       gboolean got_unauthorized)
 483 {
 484         SoupSessionHost *host;
 485         SoupAuth *new_auth, *prior_auth, *old_auth;
 486         gpointer old_path, old_realm;
 487         const SoupUri *msg_uri;
 488         const char *path;
 489         char *realm;
 490         GSList *pspace, *p;
 491         gboolean prior_auth_failed = FALSE;
 492
 493         host = get_host_for_message (session, msg);
 494         g_return_val_if_fail (host != NULL, FALSE);
 495
 496         /* Try to construct a new auth from the headers; if we can't,
 497          * there's no way we'll be able to authenticate.
 498          */
 499         msg_uri = soup_message_get_uri (msg);
 500         new_auth = soup_auth_new_from_header_list (headers);
 501         if (!new_auth)
 502                 return FALSE;
 503
 504         /* See if this auth is the same auth we used last time */
 505         prior_auth = lookup_auth (session, msg, proxy);
 506         if (prior_auth &&
 507             G_OBJECT_TYPE (prior_auth) == G_OBJECT_TYPE (new_auth) &&
 508             !strcmp (soup_auth_get_realm (prior_auth),
 509                      soup_auth_get_realm (new_auth))) {
 510                 if (!got_unauthorized) {
 511                         /* The user is just trying to preauthenticate
 512                          * using information we already have, so
 513                          * there's nothing more that needs to be done.
 514                          */
 515                         g_object_unref (new_auth);
 516                         return TRUE;
 517                 }
 518
 519                 /* The server didn't like the username/password we
 520                  * provided before. Invalidate it and note this fact.
 521                  */
 522                 invalidate_auth (host, prior_auth);
 523                 prior_auth_failed = TRUE;
 524         }
 525
 526         if (!host->auth_realms) {
 527                 host->auth_realms = g_hash_table_new (g_str_hash, g_str_equal);
 528                 host->auths = g_hash_table_new (g_str_hash, g_str_equal);
 529         }
 530
 531         /* Record where this auth realm is used */
 532         realm = g_strdup_printf ("%s:%s",
 533                                  soup_auth_get_scheme_name (new_auth),
 534                                  soup_auth_get_realm (new_auth));
 535         pspace = soup_auth_get_protection_space (new_auth, msg_uri);
 536         for (p = pspace; p; p = p->next) {
 537                 path = p->data;
 538                 if (g_hash_table_lookup_extended (host->auth_realms, path,
 539                                                   &old_path, &old_realm)) {
 540                         g_hash_table_remove (host->auth_realms, old_path);
 541                         g_free (old_path);
 542                         g_free (old_realm);
 543                 }
 544
 545                 g_hash_table_insert (host->auth_realms,
 546                                      g_strdup (path), g_strdup (realm));
 547         }
 548         soup_auth_free_protection_space (new_auth, pspace);
 549
 550         /* Now, make sure the auth is recorded. (If there's a
 551          * pre-existing auth, we keep that rather than the new one,
 552          * since the old one might already be authenticated.)
 553          */
 554         old_auth = g_hash_table_lookup (host->auths, realm);
 555         if (old_auth) {
 556                 g_free (realm);
 557                 g_object_unref (new_auth);
 558                 new_auth = old_auth;
 559         } else
 560                 g_hash_table_insert (host->auths, realm, new_auth);
 561
 562         /* If we need to authenticate, try to do it. */
 563         if (!soup_auth_is_authenticated (new_auth)) {
 564                 return authenticate_auth (session, new_auth,
 565                                           msg, prior_auth_failed);
 566         }
 567
 568         /* Otherwise we're good. */
 569         return TRUE;
 570 }
 571
 572 static void
 573 connection_authenticate (SoupConnection *conn, SoupMessage *msg,
 574                          const char *auth_type, const char *auth_realm,
 575                          char **username, char **password, gpointer session)
 576 {
 577         g_signal_emit (session, signals[AUTHENTICATE], 0,
 578                        msg, auth_type, auth_realm, username, password);
 579 }
 580
 581 static void
 582 connection_reauthenticate (SoupConnection *conn, SoupMessage *msg,
 583                            const char *auth_type, const char *auth_realm,
 584                            char **username, char **password,
 585                            gpointer user_data)
 586 {
 587         g_signal_emit (conn, signals[REAUTHENTICATE], 0,
 588                        msg, auth_type, auth_realm, username, password);
 589 }
 590
 591
 592 static void
 593 authorize_handler (SoupMessage *msg, gpointer user_data)
 594 {
 595         SoupSession *session = user_data;
 596         const GSList *headers;
 597         gboolean proxy;
 598
 599         if (msg->status_code == SOUP_STATUS_PROXY_AUTHENTICATION_REQUIRED) {
 600                 headers = soup_message_get_header_list (msg->response_headers,
 601                                                         "Proxy-Authenticate");
 602                 proxy = TRUE;
 603         } else {
 604                 headers = soup_message_get_header_list (msg->response_headers,
 605                                                         "WWW-Authenticate");
 606                 proxy = FALSE;
 607         }
 608         if (!headers)
 609                 return;
 610
 611         if (update_auth_internal (session, msg, headers, proxy, TRUE))
 612                 soup_session_requeue_message (session, msg);
 613 }
 614
 615 static void
 616 redirect_handler (SoupMessage *msg, gpointer user_data)
 617 {
 618         SoupSession *session = user_data;
 619         const char *new_loc;
 620         SoupUri *new_uri;
 621
 622         new_loc = soup_message_get_header (msg->response_headers, "Location");
 623         if (!new_loc)
 624                 return;
 625         new_uri = soup_uri_new (new_loc);
 626         if (!new_uri)
 627                 goto INVALID_REDIRECT;
 628
 629         soup_message_set_uri (msg, new_uri);
 630         soup_uri_free (new_uri);
 631
 632         soup_session_requeue_message (session, msg);
 633         return;
 634
 635  INVALID_REDIRECT:
 636         soup_message_set_status_full (msg,
 637                                       SOUP_STATUS_MALFORMED,
 638                                       "Invalid Redirect URL");
 639 }
 640
 641 static void
 642 request_finished (SoupMessage *req, gpointer user_data)
 643 {
 644         if (!SOUP_MESSAGE_IS_STARTING (req))
 645                 req->status = SOUP_MESSAGE_STATUS_FINISHED;
 646 }
 647
 648 static void
 649 final_finished (SoupMessage *req, gpointer user_data)
 650 {
 651         SoupSession *session = user_data;
 652
 653         if (!SOUP_MESSAGE_IS_STARTING (req)) {
 654                 soup_message_queue_remove_message (session->priv->queue, req);
 655
 656                 g_signal_handlers_disconnect_by_func (req, request_finished, session);
 657                 g_signal_handlers_disconnect_by_func (req, final_finished, session);
 658                 g_object_unref (req);
 659         }
 660
 661         run_queue (session, FALSE);
 662 }
 663
 664 static void
 665 add_auth (SoupSession *session, SoupMessage *msg, gboolean proxy)
 666 {
 667         const char *header = proxy ? "Proxy-Authorization" : "Authorization";
 668         SoupAuth *auth;
 669         char *token;
 670
 671         soup_message_remove_header (msg->request_headers, header);
 672
 673         auth = lookup_auth (session, msg, proxy);
 674         if (!auth)
 675                 return;
 676         if (!soup_auth_is_authenticated (auth) &&
 677             !authenticate_auth (session, auth, msg, FALSE))
 678                 return;
 679
 680         token = soup_auth_get_authorization (auth, msg);
 681         if (token) {
 682                 soup_message_add_header (msg->request_headers, header, token);
 683                 g_free (token);
 684         }
 685 }
 686
 687 static void
 688 send_request (SoupSession *session, SoupMessage *req, SoupConnection *conn)
 689 {
 690         req->status = SOUP_MESSAGE_STATUS_RUNNING;
 691
 692         add_auth (session, req, FALSE);
 693         if (session->priv->proxy_uri)
 694                 add_auth (session, req, TRUE);
 695         soup_connection_send_request (conn, req);
 696 }
 697
 698 static void
 699 find_oldest_connection (gpointer key, gpointer host, gpointer data)
 700 {
 701         SoupConnection *conn = key, **oldest = data;
 702
 703         /* Don't prune a connection that hasn't even been used yet. */
 704         if (soup_connection_last_used (conn) == 0)
 705                 return;
 706
 707         if (!*oldest || (soup_connection_last_used (conn) <
 708                          soup_connection_last_used (*oldest)))
 709                 *oldest = conn;
 710 }
 711
 712 static gboolean
 713 try_prune_connection (SoupSession *session)
 714 {
 715         SoupConnection *oldest = NULL;
 716
 717         g_hash_table_foreach (session->priv->conns, find_oldest_connection,
 718                               &oldest);
 719         if (oldest) {
 720                 soup_connection_disconnect (oldest);
 721                 g_object_unref (oldest);
 722                 return TRUE;
 723         } else
 724                 return FALSE;
 725 }
 726
 727 static void connection_closed (SoupConnection *conn, SoupSession *session);
 728
 729 static void
 730 cleanup_connection (SoupSession *session, SoupConnection *conn)
 731 {
 732         SoupSessionHost *host =
 733                 g_hash_table_lookup (session->priv->conns, conn);
 734
 735         g_return_if_fail (host != NULL);
 736
 737         g_hash_table_remove (session->priv->conns, conn);
 738         g_signal_handlers_disconnect_by_func (conn, connection_closed, session);
 739         session->priv->num_conns--;
 740
 741         host->connections = g_slist_remove (host->connections, conn);
 742         host->num_conns--;
 743 }
 744
 745 static void
 746 connection_closed (SoupConnection *conn, SoupSession *session)
 747 {
 748         cleanup_connection (session, conn);
 749
 750         /* Run the queue in case anyone was waiting for a connection
 751          * to be closed.
 752          */
 753         run_queue (session, FALSE);
 754 }
 755
 756 static void
 757 got_connection (SoupConnection *conn, guint status, gpointer user_data)
 758 {
 759         SoupSession *session = user_data;
 760         SoupSessionHost *host = g_hash_table_lookup (session->priv->conns, conn);
 761
 762         g_return_if_fail (host != NULL);
 763
 764         if (status == SOUP_STATUS_OK) {
 765                 host->connections = g_slist_prepend (host->connections, conn);
 766                 run_queue (session, FALSE);
 767                 return;
 768         }
 769
 770         /* We failed */
 771         cleanup_connection (session, conn);
 772         g_object_unref (conn);
 773
 774         if (host->connections) {
 775                 /* Something went wrong this time, but we have at
 776                  * least one open connection to this host. So just
 777                  * leave the message in the queue so it can use that
 778                  * connection once it's free.
 779                  */
 780                 return;
 781         }
 782
 783         /* Flush any queued messages for this host */
 784         host->error = status;
 785         run_queue (session, FALSE);
 786
 787         if (status != SOUP_STATUS_CANT_RESOLVE &&
 788             status != SOUP_STATUS_CANT_RESOLVE_PROXY) {
 789                 /* If the error was "can't resolve", then it's not likely
 790                  * to improve. But if it was something else, it may have
 791                  * been transient, so we clear the error so the user can
 792                  * try again later.
 793                  */
 794                 host->error = 0;
 795         }
 796 }
 797
 798 static gboolean
 799 run_queue (SoupSession *session, gboolean try_pruning)
 800 {
 801         SoupMessageQueueIter iter;
 802         SoupMessage *msg;
 803         SoupConnection *conn;
 804         SoupSessionHost *host;
 805         gboolean skipped_any = FALSE, started_any = FALSE;
 806         GSList *conns;
 807
 808         /* FIXME: prefer CONNECTING messages */
 809
 810  try_again:
 811         for (msg = soup_message_queue_first (session->priv->queue, &iter); msg; msg = soup_message_queue_next (session->priv->queue, &iter)) {
 812
 813                 if (!SOUP_MESSAGE_IS_STARTING (msg))
 814                         continue;
 815
 816                 host = get_host_for_message (session, msg);
 817
 818                 /* If the hostname is known to be bad, fail right away */
 819                 if (host->error) {
 820                         soup_message_set_status (msg, host->error);
 821                         msg->status = SOUP_MESSAGE_STATUS_FINISHED;
 822                         soup_message_finished (msg);
 823                 }
 824
 825                 /* If there is an idle connection, use it */
 826                 for (conns = host->connections; conns; conns = conns->next) {
 827                         if (!soup_connection_is_in_use (conns->data))
 828                                 break;
 829                 }
 830                 if (conns) {
 831                         send_request (session, msg, conns->data);
 832                         started_any = TRUE;
 833                         continue;
 834                 }
 835
 836                 if (msg->status == SOUP_MESSAGE_STATUS_CONNECTING) {
 837                         /* We already started a connection for this
 838                          * message, so don't start another one.
 839                          */
 840                         continue;
 841                 }
 842
 843                 /* If we have the max number of per-host connections
 844                  * or total connections open, we'll have to wait.
 845                  */
 846                 if (host->num_conns >= session->priv->max_conns_per_host)
 847                         continue;
 848                 else if (session->priv->num_conns >= session->priv->max_conns) {
 849                         /* In this case, closing an idle connection
 850                          * somewhere else would let us open one here.
 851                          */
 852                         skipped_any = TRUE;
 853                         continue;
 854                 }
 855
 856                 /* Otherwise, open a new connection */
 857                 conn = g_object_new (
 858                         (session->priv->use_ntlm ?
 859                          SOUP_TYPE_CONNECTION_NTLM : SOUP_TYPE_CONNECTION),
 860                         SOUP_CONNECTION_ORIGIN_URI, host->root_uri,
 861                         SOUP_CONNECTION_PROXY_URI, session->priv->proxy_uri,
 862                         SOUP_CONNECTION_SSL_CREDENTIALS, session->priv->ssl_creds,
 863                         NULL);
 864                 g_signal_connect (conn, "authenticate",
 865                                   G_CALLBACK (connection_authenticate),
 866                                   session);
 867                 g_signal_connect (conn, "reauthenticate",
 868                                   G_CALLBACK (connection_reauthenticate),
 869                                   session);
 870
 871                 soup_connection_connect_async (conn, got_connection, session);
 872                 g_signal_connect (conn, "disconnected",
 873                                   G_CALLBACK (connection_closed), session);
 874                 g_hash_table_insert (session->priv->conns, conn, host);
 875                 session->priv->num_conns++;
 876
 877                 /* Increment the host's connection count, but don't add
 878                  * this connection to the list yet, since it's not ready.
 879                  */
 880                 host->num_conns++;
 881
 882                 /* Mark the request as connecting, so we don't try to
 883                  * open another new connection for it next time around.
 884                  */
 885                 msg->status = SOUP_MESSAGE_STATUS_CONNECTING;
 886
 887                 started_any = TRUE;
 888         }
 889
 890         if (try_pruning && skipped_any && !started_any) {
 891                 /* We didn't manage to start any message, but there is
 892                  * at least one message in the queue that could be
 893                  * sent if we pruned an idle connection from some
 894                  * other server.
 895                  */
 896                 if (try_prune_connection (session)) {
 897                         try_pruning = FALSE;
 898                         goto try_again;
 899                 }
 900         }
 901
 902         return started_any;
 903 }
 904
 905 static void
 906 queue_message (SoupSession *session, SoupMessage *req, gboolean requeue)
 907 {
 908         req->status = SOUP_MESSAGE_STATUS_QUEUED;
 909         if (!requeue) {
 910                 soup_message_queue_append (session->priv->queue, req);
 911                 run_queue (session, TRUE);
 912         }
 913 }
 914
 915 /**
 916  * soup_session_queue_message:
 917  * @session: a #SoupSession
 918  * @req: the message to queue
 919  * @callback: a #SoupMessageCallbackFn which will be called after the
 920  * message completes or when an unrecoverable error occurs.
 921  * @user_data: a pointer passed to @callback.
 922  *
 923  * Queues the message @req for sending. All messages are processed
 924  * while the glib main loop runs. If @req has been processed before,
 925  * any resources related to the time it was last sent are freed.
 926  *
 927  * Upon message completion, the callback specified in @callback will
 928  * be invoked. If after returning from this callback the message has
 929  * not been requeued, @req will be unreffed.
 930  */
 931 void
 932 soup_session_queue_message (SoupSession *session, SoupMessage *req,
 933                             SoupMessageCallbackFn callback, gpointer user_data)
 934 {
 935         g_return_if_fail (SOUP_IS_SESSION (session));
 936         g_return_if_fail (SOUP_IS_MESSAGE (req));
 937
 938         g_signal_connect (req, "finished",
 939                           G_CALLBACK (request_finished), session);
 940         if (callback) {
 941                 g_signal_connect (req, "finished",
 942                                   G_CALLBACK (callback), user_data);
 943         }
 944         g_signal_connect_after (req, "finished",
 945                                 G_CALLBACK (final_finished), session);
 946
 947         soup_message_add_status_code_handler  (req, SOUP_STATUS_UNAUTHORIZED,
 948                                                SOUP_HANDLER_POST_BODY,
 949                                                authorize_handler, session);
 950         soup_message_add_status_code_handler  (req,
 951                                                SOUP_STATUS_PROXY_UNAUTHORIZED,
 952                                                SOUP_HANDLER_POST_BODY,
 953                                                authorize_handler, session);
 954
 955         if (!(soup_message_get_flags (req) & SOUP_MESSAGE_NO_REDIRECT)) {
 956                 soup_message_add_status_class_handler (
 957                         req, SOUP_STATUS_CLASS_REDIRECT,
 958                         SOUP_HANDLER_POST_BODY,
 959                         redirect_handler, session);
 960         }
 961
 962         queue_message (session, req, FALSE);
 963 }
 964
 965 /**
 966  * soup_session_requeue_message:
 967  * @session: a #SoupSession
 968  * @req: the message to requeue
 969  *
 970  * This causes @req to be placed back on the queue to be attempted
 971  * again.
 972  **/
 973 void
 974 soup_session_requeue_message (SoupSession *session, SoupMessage *req)
 975 {
 976         g_return_if_fail (SOUP_IS_SESSION (session));
 977         g_return_if_fail (SOUP_IS_MESSAGE (req));
 978
 979         queue_message (session, req, TRUE);
 980 }
 981
 982
 983 /**
 984  * soup_session_send_message:
 985  * @session: a #SoupSession
 986  * @req: the message to send
 987  *
 988  * Synchronously send @req. This call will not return until the
 989  * transfer is finished successfully or there is an unrecoverable
 990  * error.
 991  *
 992  * @req is not freed upon return.
 993  *
 994  * Return value: the HTTP status code of the response
 995  */
 996 guint
 997 soup_session_send_message (SoupSession *session, SoupMessage *req)
 998 {
 999         g_return_val_if_fail (SOUP_IS_SESSION (session), SOUP_STATUS_MALFORMED);
1000         g_return_val_if_fail (SOUP_IS_MESSAGE (req), SOUP_STATUS_MALFORMED);
1001
1002         /* Balance out the unref that final_finished will do */
1003         g_object_ref (req);
1004
1005         soup_session_queue_message (session, req, NULL, NULL);
1006
1007         while (req->status != SOUP_MESSAGE_STATUS_FINISHED &&
1008                !SOUP_STATUS_IS_TRANSPORT_ERROR (req->status_code))
1009                 g_main_iteration (TRUE);
1010
1011         return req->status_code;
1012 }
1013
1014 /**
1015  * soup_session_abort:
1016  * @session: the session
1017  *
1018  * Cancels all pending requests in @session.
1019  **/
1020 void
1021 soup_session_abort (SoupSession *session)
1022 {
1023         SoupMessageQueueIter iter;
1024         SoupMessage *msg;
1025
1026         for (msg = soup_message_queue_first (session->priv->queue, &iter); msg; msg = soup_message_queue_next (session->priv->queue, &iter)) {
1027                 soup_message_queue_remove (session->priv->queue, &iter);
1028                 soup_message_cancel (msg);
1029         }
1030 }