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-auth-basic.h"
  18 #include "soup-auth-digest.h"
  19 #include "soup-auth-manager.h"
  20 #include "soup-auth-manager-ntlm.h"
  21 #include "soup-connection.h"
  22 #include "soup-marshal.h"
  23 #include "soup-message-private.h"
  24 #include "soup-message-queue.h"
  25 #include "soup-session.h"
  26 #include "soup-session-feature.h"
  27 #include "soup-session-private.h"
  28 #include "soup-socket.h"
  29 #include "soup-ssl.h"
  30 #include "soup-uri.h"
  31
  32 /**
  33  * SECTION:soup-session
  34  * @short_description: Soup session state object
  35  *
  36  * #SoupSession is the object that controls client-side HTTP. A
  37  * #SoupSession encapsulates all of the state that libsoup is keeping
  38  * on behalf of your program; cached HTTP connections, authentication
  39  * information, etc.
  40  *
  41  * Most applications will only need a single #SoupSession; the primary
  42  * reason you might need multiple sessions is if you need to have
  43  * multiple independent authentication contexts. (Eg, you are
  44  * connecting to a server and authenticating as two different users at
  45  * different times; the easiest way to ensure that each #SoupMessage
  46  * is sent with the authentication information you intended is to use
  47  * one session for the first user, and a second session for the other
  48  * user.)
  49  *
  50  * #SoupSession itself is an abstract class, with two subclasses. If
  51  * you are using the glib main loop, you will generally want to use
  52  * #SoupSessionAsync, which uses non-blocking I/O and callbacks. On
  53  * the other hand, if your application is threaded and you want to do
  54  * synchronous I/O in a separate thread from the UI, use
  55  * #SoupSessionSync.
  56  **/
  57
  58 typedef struct {
  59         SoupURI    *root_uri;
  60
  61         GSList     *connections;      /* CONTAINS: SoupConnection */
  62         guint       num_conns;
  63
  64         GHashTable *auth_realms;      /* path -> scheme:realm */
  65         GHashTable *auths;            /* scheme:realm -> SoupAuth */
  66 } SoupSessionHost;
  67
  68 typedef struct {
  69         SoupURI *proxy_uri;
  70         SoupAuth *proxy_auth;
  71
  72         char *ssl_ca_file;
  73         SoupSSLCredentials *ssl_creds;
  74
  75         SoupMessageQueue *queue;
  76
  77         char *user_agent;
  78
  79         GSList *features;
  80         SoupAuthManager *auth_manager;
  81         SoupAuthManagerNTLM *ntlm_manager;
  82
  83         GHashTable *hosts; /* SoupURI -> SoupSessionHost */
  84         GHashTable *conns; /* SoupConnection -> SoupSessionHost */
  85         guint num_conns;
  86         guint max_conns, max_conns_per_host;
  87         guint io_timeout, idle_timeout;
  88
  89         /* Must hold the host_lock before potentially creating a
  90          * new SoupSessionHost, or adding/removing a connection.
  91          * Must not emit signals or destroy objects while holding it.
  92          */
  93         GMutex *host_lock;
  94
  95         GMainContext *async_context;
  96 } SoupSessionPrivate;
  97 #define SOUP_SESSION_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), SOUP_TYPE_SESSION, SoupSessionPrivate))
  98
  99 static void     free_host      (SoupSessionHost *host);
 100
 101 static void queue_message   (SoupSession *session, SoupMessage *msg,
 102                              SoupSessionCallback callback, gpointer user_data);
 103 static void requeue_message (SoupSession *session, SoupMessage *msg);
 104 static void cancel_message  (SoupSession *session, SoupMessage *msg,
 105                              guint status_code);
 106
 107 /* temporary until we fix this to index hosts by SoupAddress */
 108 extern guint     soup_uri_host_hash  (gconstpointer  key);
 109 extern gboolean  soup_uri_host_equal (gconstpointer  v1,
 110                                       gconstpointer  v2);
 111 extern SoupURI  *soup_uri_copy_root  (SoupURI *uri);
 112
 113 #define SOUP_SESSION_MAX_CONNS_DEFAULT 10
 114 #define SOUP_SESSION_MAX_CONNS_PER_HOST_DEFAULT 2
 115
 116 #define SOUP_SESSION_USER_AGENT_BASE "libsoup/" PACKAGE_VERSION
 117
 118 G_DEFINE_TYPE (SoupSession, soup_session, G_TYPE_OBJECT)
 119
 120 enum {
 121         REQUEST_QUEUED,
 122         REQUEST_STARTED,
 123         REQUEST_UNQUEUED,
 124         AUTHENTICATE,
 125         LAST_SIGNAL
 126 };
 127
 128 static guint signals[LAST_SIGNAL] = { 0 };
 129
 130 enum {
 131         PROP_0,
 132
 133         PROP_PROXY_URI,
 134         PROP_MAX_CONNS,
 135         PROP_MAX_CONNS_PER_HOST,
 136         PROP_USE_NTLM,
 137         PROP_SSL_CA_FILE,
 138         PROP_ASYNC_CONTEXT,
 139         PROP_TIMEOUT,
 140         PROP_USER_AGENT,
 141         PROP_IDLE_TIMEOUT,
 142         PROP_ADD_FEATURE,
 143         PROP_ADD_FEATURE_BY_TYPE,
 144         PROP_REMOVE_FEATURE_BY_TYPE,
 145
 146         LAST_PROP
 147 };
 148
 149 static void set_property (GObject *object, guint prop_id,
 150                           const GValue *value, GParamSpec *pspec);
 151 static void get_property (GObject *object, guint prop_id,
 152                           GValue *value, GParamSpec *pspec);
 153
 154 static void
 155 soup_session_init (SoupSession *session)
 156 {
 157         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 158
 159         priv->queue = soup_message_queue_new ();
 160
 161         priv->host_lock = g_mutex_new ();
 162         priv->hosts = g_hash_table_new (soup_uri_host_hash,
 163                                         soup_uri_host_equal);
 164         priv->conns = g_hash_table_new (NULL, NULL);
 165
 166         priv->max_conns = SOUP_SESSION_MAX_CONNS_DEFAULT;
 167         priv->max_conns_per_host = SOUP_SESSION_MAX_CONNS_PER_HOST_DEFAULT;
 168
 169         priv->auth_manager = soup_auth_manager_new (session);
 170         soup_auth_manager_add_type (priv->auth_manager, SOUP_TYPE_AUTH_BASIC);
 171         soup_auth_manager_add_type (priv->auth_manager, SOUP_TYPE_AUTH_DIGEST);
 172 }
 173
 174 static gboolean
 175 foreach_free_host (gpointer key, gpointer host, gpointer data)
 176 {
 177         free_host (host);
 178         return TRUE;
 179 }
 180
 181 static void
 182 cleanup_hosts (SoupSessionPrivate *priv)
 183 {
 184         GHashTable *old_hosts;
 185
 186         g_mutex_lock (priv->host_lock);
 187         old_hosts = priv->hosts;
 188         priv->hosts = g_hash_table_new (soup_uri_host_hash,
 189                                         soup_uri_host_equal);
 190         g_mutex_unlock (priv->host_lock);
 191
 192         g_hash_table_foreach_remove (old_hosts, foreach_free_host, NULL);
 193         g_hash_table_destroy (old_hosts);
 194 }
 195
 196 static void
 197 dispose (GObject *object)
 198 {
 199         SoupSession *session = SOUP_SESSION (object);
 200         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 201
 202         soup_session_abort (session);
 203         cleanup_hosts (priv);
 204
 205         while (priv->features)
 206                 soup_session_remove_feature (session, priv->features->data);
 207
 208         G_OBJECT_CLASS (soup_session_parent_class)->dispose (object);
 209 }
 210
 211 static void
 212 finalize (GObject *object)
 213 {
 214         SoupSession *session = SOUP_SESSION (object);
 215         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 216
 217         soup_message_queue_destroy (priv->queue);
 218
 219         g_mutex_free (priv->host_lock);
 220         g_hash_table_destroy (priv->hosts);
 221         g_hash_table_destroy (priv->conns);
 222
 223         g_free (priv->user_agent);
 224
 225         soup_auth_manager_free (priv->auth_manager);
 226         if (priv->ntlm_manager)
 227                 soup_auth_manager_ntlm_free (priv->ntlm_manager);
 228
 229         if (priv->proxy_uri)
 230                 soup_uri_free (priv->proxy_uri);
 231
 232         if (priv->ssl_creds)
 233                 soup_ssl_free_client_credentials (priv->ssl_creds);
 234
 235         if (priv->async_context)
 236                 g_main_context_unref (priv->async_context);
 237
 238         G_OBJECT_CLASS (soup_session_parent_class)->finalize (object);
 239 }
 240
 241 static void
 242 soup_session_class_init (SoupSessionClass *session_class)
 243 {
 244         GObjectClass *object_class = G_OBJECT_CLASS (session_class);
 245
 246         g_type_class_add_private (session_class, sizeof (SoupSessionPrivate));
 247
 248         /* virtual method definition */
 249         session_class->queue_message = queue_message;
 250         session_class->requeue_message = requeue_message;
 251         session_class->cancel_message = cancel_message;
 252
 253         /* virtual method override */
 254         object_class->dispose = dispose;
 255         object_class->finalize = finalize;
 256         object_class->set_property = set_property;
 257         object_class->get_property = get_property;
 258
 259         /* signals */
 260
 261         /**
 262          * SoupSession::request-queued:
 263          * @session: the session
 264          * @msg: the request that was queued
 265          *
 266          * Emitted when a request is queued on @session. (Note that
 267          * "queued" doesn't just mean soup_session_queue_message();
 268          * soup_session_send_message() implicitly queues the message
 269          * as well.)
 270          *
 271          * When sending a request, first #SoupSession::request_queued
 272          * is emitted, indicating that the session has become aware of
 273          * the request.
 274          *
 275          * Once a connection is available to send the request on, the
 276          * session emits #SoupSession::request_started. Then, various
 277          * #SoupMessage signals are emitted as the message is
 278          * processed. If the message is requeued, it will emit
 279          * #SoupMessage::restarted, which will then be followed by
 280          * another #SoupSession::request_started and another set of
 281          * #SoupMessage signals when the message is re-sent.
 282          *
 283          * Eventually, the message will emit #SoupMessage::finished.
 284          * Normally, this signals the completion of message
 285          * processing. However, it is possible that the application
 286          * will requeue the message from the "finished" handler (or
 287          * equivalently, from the soup_session_queue_message()
 288          * callback). In that case, the process will loop back to
 289          * #SoupSession::request_started.
 290          *
 291          * Eventually, a message will reach "finished" and not be
 292          * requeued. At that point, the session will emit
 293          * #SoupSession::request_unqueued to indicate that it is done
 294          * with the message.
 295          *
 296          * To sum up: #SoupSession::request_queued and
 297          * #SoupSession::request_unqueued are guaranteed to be emitted
 298          * exactly once, but #SoupSession::request_started and
 299          * #SoupMessage::finished (and all of the other #SoupMessage
 300          * signals) may be invoked multiple times for a given message.
 301          **/
 302         signals[REQUEST_QUEUED] =
 303                 g_signal_new ("request-queued",
 304                               G_OBJECT_CLASS_TYPE (object_class),
 305                               G_SIGNAL_RUN_FIRST,
 306                               0, /* FIXME? */
 307                               NULL, NULL,
 308                               soup_marshal_NONE__OBJECT,
 309                               G_TYPE_NONE, 1,
 310                               SOUP_TYPE_MESSAGE);
 311
 312         /**
 313          * SoupSession::request-started:
 314          * @session: the session
 315          * @msg: the request being sent
 316          * @socket: the socket the request is being sent on
 317          *
 318          * Emitted just before a request is sent. See
 319          * #SoupSession::request_queued for a detailed description of
 320          * the message lifecycle within a session.
 321          **/
 322         signals[REQUEST_STARTED] =
 323                 g_signal_new ("request-started",
 324                               G_OBJECT_CLASS_TYPE (object_class),
 325                               G_SIGNAL_RUN_FIRST,
 326                               G_STRUCT_OFFSET (SoupSessionClass, request_started),
 327                               NULL, NULL,
 328                               soup_marshal_NONE__OBJECT_OBJECT,
 329                               G_TYPE_NONE, 2,
 330                               SOUP_TYPE_MESSAGE,
 331                               SOUP_TYPE_SOCKET);
 332
 333         /**
 334          * SoupSession::request-unqueued:
 335          * @session: the session
 336          * @msg: the request that was unqueued
 337          *
 338          * Emitted when a request is removed from @session's queue,
 339          * indicating that @session is done with it. See
 340          * #SoupSession::request_queued for a detailed description of the
 341          * message lifecycle within a session.
 342          **/
 343         signals[REQUEST_UNQUEUED] =
 344                 g_signal_new ("request-unqueued",
 345                               G_OBJECT_CLASS_TYPE (object_class),
 346                               G_SIGNAL_RUN_FIRST,
 347                               0, /* FIXME? */
 348                               NULL, NULL,
 349                               soup_marshal_NONE__OBJECT,
 350                               G_TYPE_NONE, 1,
 351                               SOUP_TYPE_MESSAGE);
 352
 353         /**
 354          * SoupSession::authenticate:
 355          * @session: the session
 356          * @msg: the #SoupMessage being sent
 357          * @auth: the #SoupAuth to authenticate
 358          * @retrying: %TRUE if this is the second (or later) attempt
 359          *
 360          * Emitted when the session requires authentication. If
 361          * credentials are available call soup_auth_authenticate() on
 362          * @auth. If these credentials fail, the signal will be
 363          * emitted again, with @retrying set to %TRUE, which will
 364          * continue until you return without calling
 365          * soup_auth_authenticate() on @auth.
 366          *
 367          * Note that this may be emitted before @msg's body has been
 368          * fully read.
 369          *
 370          * If you call soup_session_pause_message() on @msg before
 371          * returning, then you can authenticate @auth asynchronously
 372          * (as long as you g_object_ref() it to make sure it doesn't
 373          * get destroyed), and then unpause @msg when you are ready
 374          * for it to continue.
 375          **/
 376         signals[AUTHENTICATE] =
 377                 g_signal_new ("authenticate",
 378                               G_OBJECT_CLASS_TYPE (object_class),
 379                               G_SIGNAL_RUN_FIRST,
 380                               G_STRUCT_OFFSET (SoupSessionClass, authenticate),
 381                               NULL, NULL,
 382                               soup_marshal_NONE__OBJECT_OBJECT_BOOLEAN,
 383                               G_TYPE_NONE, 3,
 384                               SOUP_TYPE_MESSAGE,
 385                               SOUP_TYPE_AUTH,
 386                               G_TYPE_BOOLEAN);
 387
 388         /* properties */
 389         g_object_class_install_property (
 390                 object_class, PROP_PROXY_URI,
 391                 g_param_spec_boxed (SOUP_SESSION_PROXY_URI,
 392                                     "Proxy URI",
 393                                     "The HTTP Proxy to use for this session",
 394                                     SOUP_TYPE_URI,
 395                                     G_PARAM_READWRITE));
 396         g_object_class_install_property (
 397                 object_class, PROP_MAX_CONNS,
 398                 g_param_spec_int (SOUP_SESSION_MAX_CONNS,
 399                                   "Max Connection Count",
 400                                   "The maximum number of connections that the session can open at once",
 401                                   1,
 402                                   G_MAXINT,
 403                                   SOUP_SESSION_MAX_CONNS_DEFAULT,
 404                                   G_PARAM_READWRITE));
 405         g_object_class_install_property (
 406                 object_class, PROP_MAX_CONNS_PER_HOST,
 407                 g_param_spec_int (SOUP_SESSION_MAX_CONNS_PER_HOST,
 408                                   "Max Per-Host Connection Count",
 409                                   "The maximum number of connections that the session can open at once to a given host",
 410                                   1,
 411                                   G_MAXINT,
 412                                   SOUP_SESSION_MAX_CONNS_PER_HOST_DEFAULT,
 413                                   G_PARAM_READWRITE));
 414         g_object_class_install_property (
 415                 object_class, PROP_IDLE_TIMEOUT,
 416                 g_param_spec_uint (SOUP_SESSION_IDLE_TIMEOUT,
 417                                    "Idle Timeout",
 418                                    "Connection lifetime when idle",
 419                                    0, G_MAXUINT, 0,
 420                                    G_PARAM_READWRITE));
 421         g_object_class_install_property (
 422                 object_class, PROP_USE_NTLM,
 423                 g_param_spec_boolean (SOUP_SESSION_USE_NTLM,
 424                                       "Use NTLM",
 425                                       "Whether or not to use NTLM authentication",
 426                                       FALSE,
 427                                       G_PARAM_READWRITE));
 428         g_object_class_install_property (
 429                 object_class, PROP_SSL_CA_FILE,
 430                 g_param_spec_string (SOUP_SESSION_SSL_CA_FILE,
 431                                      "SSL CA file",
 432                                      "File containing SSL CA certificates",
 433                                      NULL,
 434                                      G_PARAM_READWRITE));
 435         g_object_class_install_property (
 436                 object_class, PROP_ASYNC_CONTEXT,
 437                 g_param_spec_pointer (SOUP_SESSION_ASYNC_CONTEXT,
 438                                       "Async GMainContext",
 439                                       "The GMainContext to dispatch async I/O in",
 440                                       G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 441         g_object_class_install_property (
 442                 object_class, PROP_TIMEOUT,
 443                 g_param_spec_uint (SOUP_SESSION_TIMEOUT,
 444                                    "Timeout value",
 445                                    "Value in seconds to timeout a blocking I/O",
 446                                    0, G_MAXUINT, 0,
 447                                    G_PARAM_READWRITE));
 448
 449         /**
 450          * SoupSession:user-agent:
 451          *
 452          * If non-%NULL, the value to use for the "User-Agent" header
 453          * on #SoupMessage<!-- -->s sent from this session.
 454          *
 455          * RFC 2616 says: "The User-Agent request-header field
 456          * contains information about the user agent originating the
 457          * request. This is for statistical purposes, the tracing of
 458          * protocol violations, and automated recognition of user
 459          * agents for the sake of tailoring responses to avoid
 460          * particular user agent limitations. User agents SHOULD
 461          * include this field with requests."
 462          *
 463          * The User-Agent header contains a list of one or more
 464          * product tokens, separated by whitespace, with the most
 465          * significant product token coming first. The tokens must be
 466          * brief, ASCII, and mostly alphanumeric (although "-", "_",
 467          * and "." are also allowed), and may optionally include a "/"
 468          * followed by a version string. You may also put comments,
 469          * enclosed in parentheses, between or after the tokens.
 470          *
 471          * If you set a %user_agent property that has trailing
 472          * whitespace, #SoupSession will append its own product token
 473          * (eg, "<literal>libsoup/2.3.2</literal>") to the end of the
 474          * header for you.
 475          **/
 476         g_object_class_install_property (
 477                 object_class, PROP_USER_AGENT,
 478                 g_param_spec_string (SOUP_SESSION_USER_AGENT,
 479                                      "User-Agent string",
 480                                      "User-Agent string",
 481                                      NULL,
 482                                      G_PARAM_READWRITE));
 483
 484         g_object_class_install_property (
 485                 object_class, PROP_ADD_FEATURE,
 486                 g_param_spec_object (SOUP_SESSION_ADD_FEATURE,
 487                                      "Add Feature",
 488                                      "Add a feature object to the session",
 489                                      SOUP_TYPE_SESSION_FEATURE,
 490                                      G_PARAM_READWRITE));
 491         g_object_class_install_property (
 492                 object_class, PROP_ADD_FEATURE_BY_TYPE,
 493                 g_param_spec_gtype (SOUP_SESSION_ADD_FEATURE_BY_TYPE,
 494                                     "Add Feature By Type",
 495                                     "Add a feature object of the given type to the session",
 496                                     SOUP_TYPE_SESSION_FEATURE,
 497                                     G_PARAM_READWRITE));
 498         g_object_class_install_property (
 499                 object_class, PROP_REMOVE_FEATURE_BY_TYPE,
 500                 g_param_spec_gtype (SOUP_SESSION_REMOVE_FEATURE_BY_TYPE,
 501                                     "Remove Feature By Type",
 502                                     "Remove features of the given type from the session",
 503                                     SOUP_TYPE_SESSION_FEATURE,
 504                                     G_PARAM_READWRITE));
 505 }
 506
 507 static gboolean
 508 safe_uri_equal (SoupURI *a, SoupURI *b)
 509 {
 510         if (!a && !b)
 511                 return TRUE;
 512
 513         if ((a && !b) || (b && !a))
 514                 return FALSE;
 515
 516         return soup_uri_equal (a, b);
 517 }
 518
 519 static gboolean
 520 safe_str_equal (const char *a, const char *b)
 521 {
 522         if (!a && !b)
 523                 return TRUE;
 524
 525         if ((a && !b) || (b && !a))
 526                 return FALSE;
 527
 528         return strcmp (a, b) == 0;
 529 }
 530
 531 static void
 532 set_property (GObject *object, guint prop_id,
 533               const GValue *value, GParamSpec *pspec)
 534 {
 535         SoupSession *session = SOUP_SESSION (object);
 536         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 537         SoupURI *uri;
 538         gboolean need_abort = FALSE;
 539         gboolean ca_file_changed = FALSE;
 540         const char *new_ca_file, *user_agent;
 541
 542         switch (prop_id) {
 543         case PROP_PROXY_URI:
 544                 uri = g_value_get_boxed (value);
 545
 546                 if (!safe_uri_equal (priv->proxy_uri, uri))
 547                         need_abort = TRUE;
 548
 549                 if (priv->proxy_uri)
 550                         soup_uri_free (priv->proxy_uri);
 551
 552                 priv->proxy_uri = uri ? soup_uri_copy (uri) : NULL;
 553
 554                 if (need_abort) {
 555                         soup_session_abort (session);
 556                         cleanup_hosts (priv);
 557                 }
 558
 559                 break;
 560         case PROP_MAX_CONNS:
 561                 priv->max_conns = g_value_get_int (value);
 562                 break;
 563         case PROP_MAX_CONNS_PER_HOST:
 564                 priv->max_conns_per_host = g_value_get_int (value);
 565                 break;
 566         case PROP_USE_NTLM:
 567                 if (g_value_get_boolean (value)) {
 568                         if (!priv->ntlm_manager)
 569                                 priv->ntlm_manager = soup_auth_manager_ntlm_new (session);
 570                 } else {
 571                         if (priv->ntlm_manager) {
 572                                 soup_auth_manager_ntlm_free (priv->ntlm_manager);
 573                                 priv->ntlm_manager = NULL;
 574                         }
 575                 }
 576                 break;
 577         case PROP_SSL_CA_FILE:
 578                 new_ca_file = g_value_get_string (value);
 579
 580                 if (!safe_str_equal (priv->ssl_ca_file, new_ca_file))
 581                         ca_file_changed = TRUE;
 582
 583                 g_free (priv->ssl_ca_file);
 584                 priv->ssl_ca_file = g_strdup (new_ca_file);
 585
 586                 if (ca_file_changed) {
 587                         if (priv->ssl_creds) {
 588                                 soup_ssl_free_client_credentials (priv->ssl_creds);
 589                                 priv->ssl_creds = NULL;
 590                         }
 591
 592                         cleanup_hosts (priv);
 593                 }
 594
 595                 break;
 596         case PROP_ASYNC_CONTEXT:
 597                 priv->async_context = g_value_get_pointer (value);
 598                 if (priv->async_context)
 599                         g_main_context_ref (priv->async_context);
 600                 break;
 601         case PROP_TIMEOUT:
 602                 priv->io_timeout = g_value_get_uint (value);
 603                 break;
 604         case PROP_USER_AGENT:
 605                 g_free (priv->user_agent);
 606                 user_agent = g_value_get_string (value);
 607                 if (!user_agent)
 608                         priv->user_agent = NULL;
 609                 else if (!*user_agent) {
 610                         priv->user_agent =
 611                                 g_strdup (SOUP_SESSION_USER_AGENT_BASE);
 612                 } else if (g_str_has_suffix (user_agent, " ")) {
 613                         priv->user_agent =
 614                                 g_strdup_printf ("%s%s", user_agent,
 615                                                  SOUP_SESSION_USER_AGENT_BASE);
 616                 } else
 617                         priv->user_agent = g_strdup (user_agent);
 618                 break;
 619         case PROP_IDLE_TIMEOUT:
 620                 priv->idle_timeout = g_value_get_uint (value);
 621                 break;
 622         case PROP_ADD_FEATURE:
 623                 soup_session_add_feature (session, g_value_get_object (value));
 624                 break;
 625         case PROP_ADD_FEATURE_BY_TYPE:
 626                 soup_session_add_feature_by_type (session, g_value_get_gtype (value));
 627                 break;
 628         case PROP_REMOVE_FEATURE_BY_TYPE:
 629                 soup_session_remove_feature_by_type (session, g_value_get_gtype (value));
 630                 break;
 631         default:
 632                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 633                 break;
 634         }
 635 }
 636
 637 static void
 638 get_property (GObject *object, guint prop_id,
 639               GValue *value, GParamSpec *pspec)
 640 {
 641         SoupSession *session = SOUP_SESSION (object);
 642         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 643
 644         switch (prop_id) {
 645         case PROP_PROXY_URI:
 646                 g_value_set_boxed (value, priv->proxy_uri);
 647                 break;
 648         case PROP_MAX_CONNS:
 649                 g_value_set_int (value, priv->max_conns);
 650                 break;
 651         case PROP_MAX_CONNS_PER_HOST:
 652                 g_value_set_int (value, priv->max_conns_per_host);
 653                 break;
 654         case PROP_USE_NTLM:
 655                 g_value_set_boolean (value, priv->ntlm_manager != NULL);
 656                 break;
 657         case PROP_SSL_CA_FILE:
 658                 g_value_set_string (value, priv->ssl_ca_file);
 659                 break;
 660         case PROP_ASYNC_CONTEXT:
 661                 g_value_set_pointer (value, priv->async_context ? g_main_context_ref (priv->async_context) : NULL);
 662                 break;
 663         case PROP_TIMEOUT:
 664                 g_value_set_uint (value, priv->io_timeout);
 665                 break;
 666         case PROP_USER_AGENT:
 667                 g_value_set_string (value, priv->user_agent);
 668                 break;
 669         case PROP_IDLE_TIMEOUT:
 670                 g_value_set_uint (value, priv->idle_timeout);
 671                 break;
 672         default:
 673                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 674                 break;
 675         }
 676 }
 677
 678
 679 /**
 680  * soup_session_get_async_context:
 681  * @session: a #SoupSession
 682  *
 683  * Gets @session's async_context. This does not add a ref to the
 684  * context, so you will need to ref it yourself if you want it to
 685  * outlive its session.
 686  *
 687  * Return value: @session's #GMainContext, which may be %NULL
 688  **/
 689 GMainContext *
 690 soup_session_get_async_context (SoupSession *session)
 691 {
 692         SoupSessionPrivate *priv;
 693
 694         g_return_val_if_fail (SOUP_IS_SESSION (session), NULL);
 695         priv = SOUP_SESSION_GET_PRIVATE (session);
 696
 697         return priv->async_context;
 698 }
 699
 700 /* Hosts */
 701
 702 static SoupSessionHost *
 703 soup_session_host_new (SoupSession *session, SoupURI *source_uri)
 704 {
 705         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 706         SoupSessionHost *host;
 707
 708         host = g_slice_new0 (SoupSessionHost);
 709         host->root_uri = soup_uri_copy_root (source_uri);
 710
 711         if (host->root_uri->scheme == SOUP_URI_SCHEME_HTTPS &&
 712             !priv->ssl_creds) {
 713                 priv->ssl_creds =
 714                         soup_ssl_get_client_credentials (priv->ssl_ca_file);
 715         }
 716
 717         return host;
 718 }
 719
 720 /* Note: get_host_for_message doesn't lock the host_lock. The caller
 721  * must do it itself if there's a chance the host doesn't already
 722  * exist.
 723  */
 724 static SoupSessionHost *
 725 get_host_for_message (SoupSession *session, SoupMessage *msg)
 726 {
 727         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 728         SoupSessionHost *host;
 729         SoupURI *source = soup_message_get_uri (msg);
 730
 731         host = g_hash_table_lookup (priv->hosts, source);
 732         if (host)
 733                 return host;
 734
 735         host = soup_session_host_new (session, source);
 736         g_hash_table_insert (priv->hosts, host->root_uri, host);
 737
 738         return host;
 739 }
 740
 741 static void
 742 free_host (SoupSessionHost *host)
 743 {
 744         while (host->connections) {
 745                 SoupConnection *conn = host->connections->data;
 746
 747                 host->connections = g_slist_remove (host->connections, conn);
 748                 soup_connection_disconnect (conn);
 749         }
 750
 751         soup_uri_free (host->root_uri);
 752         g_slice_free (SoupSessionHost, host);
 753 }
 754
 755 void
 756 soup_session_emit_authenticate (SoupSession *session, SoupMessage *msg,
 757                                 SoupAuth *auth, gboolean retrying)
 758 {
 759         g_signal_emit (session, signals[AUTHENTICATE], 0, msg, auth, retrying);
 760 }
 761
 762 static void
 763 redirect_handler (SoupMessage *msg, gpointer user_data)
 764 {
 765         SoupSession *session = user_data;
 766         const char *new_loc;
 767         SoupURI *new_uri;
 768
 769         new_loc = soup_message_headers_get (msg->response_headers, "Location");
 770         g_return_if_fail (new_loc != NULL);
 771
 772         if (msg->status_code == SOUP_STATUS_MOVED_PERMANENTLY ||
 773             msg->status_code == SOUP_STATUS_TEMPORARY_REDIRECT) {
 774                 /* Don't redirect non-safe methods */
 775                 if (msg->method != SOUP_METHOD_GET &&
 776                     msg->method != SOUP_METHOD_HEAD &&
 777                     msg->method != SOUP_METHOD_OPTIONS &&
 778                     msg->method != SOUP_METHOD_PROPFIND)
 779                         return;
 780         } else if (msg->status_code == SOUP_STATUS_SEE_OTHER ||
 781                    msg->status_code == SOUP_STATUS_FOUND) {
 782                 /* Redirect using a GET */
 783                 g_object_set (msg,
 784                               SOUP_MESSAGE_METHOD, SOUP_METHOD_GET,
 785                               NULL);
 786                 soup_message_set_request (msg, NULL,
 787                                           SOUP_MEMORY_STATIC, NULL, 0);
 788                 soup_message_headers_set_encoding (msg->request_headers,
 789                                                    SOUP_ENCODING_NONE);
 790         } else {
 791                 /* Three possibilities:
 792                  *
 793                  *   1) This was a non-3xx response that happened to
 794                  *      have a "Location" header
 795                  *   2) It's a non-redirecty 3xx response (300, 304,
 796                  *      305, 306)
 797                  *   3) It's some newly-defined 3xx response (308+)
 798                  *
 799                  * We ignore all of these cases. In the first two,
 800                  * redirecting would be explicitly wrong, and in the
 801                  * last case, we have no clue if the 3xx response is
 802                  * supposed to be redirecty or non-redirecty. Plus,
 803                  * 2616 says unrecognized status codes should be
 804                  * treated as the equivalent to the x00 code, and we
 805                  * don't redirect on 300, so therefore we shouldn't
 806                  * redirect on 308+ either.
 807                  */
 808                 return;
 809         }
 810
 811         /* Location is supposed to be an absolute URI, but some sites
 812          * are lame, so we use soup_uri_new_with_base().
 813          */
 814         new_uri = soup_uri_new_with_base (soup_message_get_uri (msg), new_loc);
 815         if (!new_uri) {
 816                 soup_message_set_status_full (msg,
 817                                               SOUP_STATUS_MALFORMED,
 818                                               "Invalid Redirect URL");
 819                 return;
 820         }
 821
 822         soup_message_set_uri (msg, new_uri);
 823         soup_uri_free (new_uri);
 824
 825         soup_session_requeue_message (session, msg);
 826 }
 827
 828 static void
 829 connection_started_request (SoupConnection *conn, SoupMessage *msg,
 830                             gpointer data)
 831 {
 832         SoupSession *session = data;
 833         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 834
 835         if (priv->user_agent) {
 836                 soup_message_headers_replace (msg->request_headers,
 837                                               "User-Agent", priv->user_agent);
 838         }
 839
 840         /* Kludge to deal with the fact that CONNECT msgs come from the
 841          * SoupConnection rather than being queued normally.
 842          */
 843         if (msg->method == SOUP_METHOD_CONNECT)
 844                 g_signal_emit (session, signals[REQUEST_QUEUED], 0, msg);
 845
 846         g_signal_emit (session, signals[REQUEST_STARTED], 0,
 847                        msg, soup_connection_get_socket (conn));
 848 }
 849
 850 gboolean
 851 soup_session_try_prune_connection (SoupSession *session)
 852 {
 853         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 854         GPtrArray *conns;
 855         GHashTableIter iter;
 856         gpointer conn, host;
 857         int i;
 858
 859         conns = g_ptr_array_new ();
 860
 861         g_mutex_lock (priv->host_lock);
 862         g_hash_table_iter_init (&iter, priv->conns);
 863         while (g_hash_table_iter_next (&iter, &conn, &host)) {
 864                 /* Don't prune a connection that is currently in use,
 865                  * or hasn't been used yet.
 866                  */
 867                 if (!soup_connection_is_in_use (conn) &&
 868                     soup_connection_last_used (conn) > 0)
 869                         g_ptr_array_add (conns, g_object_ref (conn));
 870         }
 871         g_mutex_unlock (priv->host_lock);
 872
 873         if (!conns->len) {
 874                 g_ptr_array_free (conns, TRUE);
 875                 return FALSE;
 876         }
 877
 878         for (i = 0; i < conns->len; i++) {
 879                 soup_connection_disconnect (conns->pdata[i]);
 880                 g_object_unref (conns->pdata[i]);
 881         }
 882         g_ptr_array_free (conns, TRUE);
 883
 884         return TRUE;
 885 }
 886
 887 static void
 888 connection_disconnected (SoupConnection *conn, gpointer user_data)
 889 {
 890         SoupSession *session = user_data;
 891         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 892         SoupSessionHost *host;
 893
 894         g_mutex_lock (priv->host_lock);
 895
 896         host = g_hash_table_lookup (priv->conns, conn);
 897         if (host) {
 898                 g_hash_table_remove (priv->conns, conn);
 899                 host->connections = g_slist_remove (host->connections, conn);
 900                 host->num_conns--;
 901         }
 902
 903         g_signal_handlers_disconnect_by_func (conn, connection_disconnected, session);
 904         priv->num_conns--;
 905
 906         g_mutex_unlock (priv->host_lock);
 907         g_object_unref (conn);
 908 }
 909
 910 static void
 911 connect_result (SoupConnection *conn, guint status, gpointer user_data)
 912 {
 913         SoupSession *session = user_data;
 914         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 915         SoupSessionHost *host;
 916         SoupMessageQueueIter iter;
 917         SoupMessage *msg;
 918
 919         g_mutex_lock (priv->host_lock);
 920
 921         host = g_hash_table_lookup (priv->conns, conn);
 922         if (!host) {
 923                 g_mutex_unlock (priv->host_lock);
 924                 return;
 925         }
 926
 927         if (status == SOUP_STATUS_OK) {
 928                 soup_connection_reserve (conn);
 929                 host->connections = g_slist_prepend (host->connections, conn);
 930                 g_mutex_unlock (priv->host_lock);
 931                 return;
 932         }
 933
 934         /* The connection failed. */
 935         g_mutex_unlock (priv->host_lock);
 936         connection_disconnected (conn, session);
 937
 938         if (host->connections) {
 939                 /* Something went wrong this time, but we have at
 940                  * least one open connection to this host. So just
 941                  * leave the message in the queue so it can use that
 942                  * connection once it's free.
 943                  */
 944                 return;
 945         }
 946
 947         /* There are two possibilities: either status is
 948          * SOUP_STATUS_TRY_AGAIN, in which case the session implementation
 949          * will create a new connection (and all we need to do here
 950          * is downgrade the message from CONNECTING to QUEUED); or
 951          * status is something else, probably CANT_CONNECT or
 952          * CANT_RESOLVE or the like, in which case we need to cancel
 953          * any messages waiting for this host, since they're out
 954          * of luck.
 955          */
 956         for (msg = soup_message_queue_first (priv->queue, &iter); msg; msg = soup_message_queue_next (priv->queue, &iter)) {
 957                 if (get_host_for_message (session, msg) == host) {
 958                         if (status == SOUP_STATUS_TRY_AGAIN) {
 959                                 if (soup_message_get_io_status (msg) == SOUP_MESSAGE_IO_STATUS_CONNECTING)
 960                                         soup_message_set_io_status (msg, SOUP_MESSAGE_IO_STATUS_QUEUED);
 961                         } else {
 962                                 soup_session_cancel_message (session, msg,
 963                                                              status);
 964                         }
 965                 }
 966         }
 967 }
 968
 969 /**
 970  * soup_session_get_connection:
 971  * @session: a #SoupSession
 972  * @msg: a #SoupMessage
 973  * @try_pruning: on return, whether or not to try pruning a connection
 974  * @is_new: on return, %TRUE if the returned connection is new and not
 975  * yet connected
 976  *
 977  * Tries to find or create a connection for @msg; this is an internal
 978  * method for #SoupSession subclasses.
 979  *
 980  * If there is an idle connection to the relevant host available, then
 981  * that connection will be returned (with *@is_new set to %FALSE). The
 982  * connection will be marked "reserved", so the caller must call
 983  * soup_connection_release() if it ends up not using the connection
 984  * right away.
 985  *
 986  * If there is no idle connection available, but it is possible to
 987  * create a new connection, then one will be created and returned,
 988  * with *@is_new set to %TRUE. The caller MUST then call
 989  * soup_connection_connect_sync() or soup_connection_connect_async()
 990  * to connect it. If the connection attempt succeeds, the connection
 991  * will be marked "reserved" and added to @session's connection pool
 992  * once it connects. If the connection attempt fails, the connection
 993  * will be unreffed.
 994  *
 995  * If no connection is available and a new connection cannot be made,
 996  * soup_session_get_connection() will return %NULL. If @session has
 997  * the maximum number of open connections open, but does not have the
 998  * maximum number of per-host connections open to the relevant host,
 999  * then *@try_pruning will be set to %TRUE. In this case, the caller
1000  * can call soup_session_try_prune_connection() to close an idle
1001  * connection, and then try soup_session_get_connection() again. (If
1002  * calling soup_session_try_prune_connection() wouldn't help, then
1003  * *@try_pruning is left untouched; it is NOT set to %FALSE.)
1004  *
1005  * Return value: a #SoupConnection, or %NULL
1006  **/
1007 SoupConnection *
1008 soup_session_get_connection (SoupSession *session, SoupMessage *msg,
1009                              gboolean *try_pruning, gboolean *is_new)
1010 {
1011         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1012         SoupConnection *conn;
1013         SoupSessionHost *host;
1014         GSList *conns;
1015
1016         g_mutex_lock (priv->host_lock);
1017
1018         host = get_host_for_message (session, msg);
1019         for (conns = host->connections; conns; conns = conns->next) {
1020                 if (!soup_connection_is_in_use (conns->data)) {
1021                         soup_connection_reserve (conns->data);
1022                         g_mutex_unlock (priv->host_lock);
1023                         *is_new = FALSE;
1024                         return conns->data;
1025                 }
1026         }
1027
1028         if (soup_message_get_io_status (msg) == SOUP_MESSAGE_IO_STATUS_CONNECTING) {
1029                 /* We already started a connection for this
1030                  * message, so don't start another one.
1031                  */
1032                 g_mutex_unlock (priv->host_lock);
1033                 return NULL;
1034         }
1035
1036         if (host->num_conns >= priv->max_conns_per_host) {
1037                 g_mutex_unlock (priv->host_lock);
1038                 return NULL;
1039         }
1040
1041         if (priv->num_conns >= priv->max_conns) {
1042                 *try_pruning = TRUE;
1043                 g_mutex_unlock (priv->host_lock);
1044                 return NULL;
1045         }
1046
1047         conn = soup_connection_new (
1048                 SOUP_CONNECTION_ORIGIN_URI, host->root_uri,
1049                 SOUP_CONNECTION_PROXY_URI, priv->proxy_uri,
1050                 SOUP_CONNECTION_SSL_CREDENTIALS, priv->ssl_creds,
1051                 SOUP_CONNECTION_ASYNC_CONTEXT, priv->async_context,
1052                 SOUP_CONNECTION_TIMEOUT, priv->io_timeout,
1053                 SOUP_CONNECTION_IDLE_TIMEOUT, priv->idle_timeout,
1054                 NULL);
1055         g_signal_connect (conn, "connect_result",
1056                           G_CALLBACK (connect_result),
1057                           session);
1058         g_signal_connect (conn, "disconnected",
1059                           G_CALLBACK (connection_disconnected),
1060                           session);
1061         g_signal_connect (conn, "request_started",
1062                           G_CALLBACK (connection_started_request),
1063                           session);
1064
1065         g_hash_table_insert (priv->conns, conn, host);
1066
1067         /* We increment the connection counts so it counts against the
1068          * totals, but we don't add it to the host's connection list
1069          * yet, since it's not ready for use.
1070          */
1071         priv->num_conns++;
1072         host->num_conns++;
1073
1074         /* Mark the request as connecting, so we don't try to open
1075          * another new connection for it while waiting for this one.
1076          */
1077         soup_message_set_io_status (msg, SOUP_MESSAGE_IO_STATUS_CONNECTING);
1078
1079         g_mutex_unlock (priv->host_lock);
1080         *is_new = TRUE;
1081         return conn;
1082 }
1083
1084 SoupMessageQueue *
1085 soup_session_get_queue (SoupSession *session)
1086 {
1087         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1088
1089         return priv->queue;
1090 }
1091
1092 static void
1093 message_finished (SoupMessage *msg, gpointer user_data)
1094 {
1095         SoupSession *session = user_data;
1096         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1097
1098         if (!SOUP_MESSAGE_IS_STARTING (msg)) {
1099                 soup_message_queue_remove_message (priv->queue, msg);
1100                 g_signal_handlers_disconnect_by_func (msg, message_finished, session);
1101                 g_signal_handlers_disconnect_by_func (msg, redirect_handler, session);
1102                 g_signal_emit (session, signals[REQUEST_UNQUEUED], 0, msg);
1103         }
1104 }
1105
1106 static void
1107 queue_message (SoupSession *session, SoupMessage *msg,
1108                SoupSessionCallback callback, gpointer user_data)
1109 {
1110         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1111
1112         g_signal_connect_after (msg, "finished",
1113                                 G_CALLBACK (message_finished), session);
1114
1115         if (!(soup_message_get_flags (msg) & SOUP_MESSAGE_NO_REDIRECT)) {
1116                 soup_message_add_header_handler (
1117                         msg, "got_body", "Location",
1118                         G_CALLBACK (redirect_handler), session);
1119         }
1120
1121         soup_message_set_io_status (msg, SOUP_MESSAGE_IO_STATUS_QUEUED);
1122         soup_message_queue_append (priv->queue, msg);
1123
1124         g_signal_emit (session, signals[REQUEST_QUEUED], 0, msg);
1125 }
1126
1127 /**
1128  * SoupSessionCallback:
1129  * @session: the session
1130  * @msg: the message that has finished
1131  * @user_data: the data passed to soup_session_queue_message
1132  *
1133  * Prototype for the callback passed to soup_session_queue_message(),
1134  * qv.
1135  **/
1136
1137 /**
1138  * soup_session_queue_message:
1139  * @session: a #SoupSession
1140  * @msg: the message to queue
1141  * @callback: a #SoupSessionCallback which will be called after the
1142  * message completes or when an unrecoverable error occurs.
1143  * @user_data: a pointer passed to @callback.
1144  *
1145  * Queues the message @msg for sending. All messages are processed
1146  * while the glib main loop runs. If @msg has been processed before,
1147  * any resources related to the time it was last sent are freed.
1148  *
1149  * Upon message completion, the callback specified in @callback will
1150  * be invoked (in the thread associated with @session's async
1151  * context). If after returning from this callback the message has not
1152  * been requeued, @msg will be unreffed.
1153  */
1154 void
1155 soup_session_queue_message (SoupSession *session, SoupMessage *msg,
1156                             SoupSessionCallback callback, gpointer user_data)
1157 {
1158         g_return_if_fail (SOUP_IS_SESSION (session));
1159         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1160
1161         SOUP_SESSION_GET_CLASS (session)->queue_message (session, msg,
1162                                                          callback, user_data);
1163 }
1164
1165 static void
1166 requeue_message (SoupSession *session, SoupMessage *msg)
1167 {
1168         soup_message_set_io_status (msg, SOUP_MESSAGE_IO_STATUS_QUEUED);
1169 }
1170
1171 /**
1172  * soup_session_requeue_message:
1173  * @session: a #SoupSession
1174  * @msg: the message to requeue
1175  *
1176  * This causes @msg to be placed back on the queue to be attempted
1177  * again.
1178  **/
1179 void
1180 soup_session_requeue_message (SoupSession *session, SoupMessage *msg)
1181 {
1182         g_return_if_fail (SOUP_IS_SESSION (session));
1183         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1184
1185         SOUP_SESSION_GET_CLASS (session)->requeue_message (session, msg);
1186 }
1187
1188
1189 /**
1190  * soup_session_send_message:
1191  * @session: a #SoupSession
1192  * @msg: the message to send
1193  *
1194  * Synchronously send @msg. This call will not return until the
1195  * transfer is finished successfully or there is an unrecoverable
1196  * error.
1197  *
1198  * @msg is not freed upon return.
1199  *
1200  * Return value: the HTTP status code of the response
1201  */
1202 guint
1203 soup_session_send_message (SoupSession *session, SoupMessage *msg)
1204 {
1205         g_return_val_if_fail (SOUP_IS_SESSION (session), SOUP_STATUS_MALFORMED);
1206         g_return_val_if_fail (SOUP_IS_MESSAGE (msg), SOUP_STATUS_MALFORMED);
1207
1208         return SOUP_SESSION_GET_CLASS (session)->send_message (session, msg);
1209 }
1210
1211
1212 /**
1213  * soup_session_pause_message:
1214  * @session: a #SoupSession
1215  * @msg: a #SoupMessage currently running on @session
1216  *
1217  * Pauses HTTP I/O on @msg. Call soup_session_unpause_message() to
1218  * resume I/O.
1219  **/
1220 void
1221 soup_session_pause_message (SoupSession *session,
1222                             SoupMessage *msg)
1223 {
1224         g_return_if_fail (SOUP_IS_SESSION (session));
1225         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1226
1227         soup_message_io_pause (msg);
1228 }
1229
1230 /**
1231  * soup_session_unpause_message:
1232  * @session: a #SoupSession
1233  * @msg: a #SoupMessage currently running on @session
1234  *
1235  * Resumes HTTP I/O on @msg. Use this to resume after calling
1236  * soup_sessino_pause_message().
1237  *
1238  * If @msg is being sent via blocking I/O, this will resume reading or
1239  * writing immediately. If @msg is using non-blocking I/O, then
1240  * reading or writing won't resume until you return to the main loop.
1241  **/
1242 void
1243 soup_session_unpause_message (SoupSession *session,
1244                               SoupMessage *msg)
1245 {
1246         g_return_if_fail (SOUP_IS_SESSION (session));
1247         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1248
1249         soup_message_io_unpause (msg);
1250 }
1251
1252
1253 static void
1254 cancel_message (SoupSession *session, SoupMessage *msg, guint status_code)
1255 {
1256         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1257
1258         soup_message_queue_remove_message (priv->queue, msg);
1259         soup_message_io_stop (msg);
1260         soup_message_set_status (msg, status_code);
1261         soup_message_finished (msg);
1262 }
1263
1264 /**
1265  * soup_session_cancel_message:
1266  * @session: a #SoupSession
1267  * @msg: the message to cancel
1268  * @status_code: status code to set on @msg (generally
1269  * %SOUP_STATUS_CANCELLED)
1270  *
1271  * Causes @session to immediately finish processing @msg, with a final
1272  * status_code of @status_code. Depending on when you cancel it, the
1273  * response state may be incomplete or inconsistent.
1274  **/
1275 void
1276 soup_session_cancel_message (SoupSession *session, SoupMessage *msg,
1277                              guint status_code)
1278 {
1279         g_return_if_fail (SOUP_IS_SESSION (session));
1280         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1281
1282         SOUP_SESSION_GET_CLASS (session)->cancel_message (session, msg, status_code);
1283 }
1284
1285 static void
1286 gather_conns (gpointer key, gpointer host, gpointer data)
1287 {
1288         SoupConnection *conn = key;
1289         GSList **conns = data;
1290
1291         *conns = g_slist_prepend (*conns, conn);
1292 }
1293
1294 /**
1295  * soup_session_abort:
1296  * @session: the session
1297  *
1298  * Cancels all pending requests in @session.
1299  **/
1300 void
1301 soup_session_abort (SoupSession *session)
1302 {
1303         SoupSessionPrivate *priv;
1304         SoupMessageQueueIter iter;
1305         SoupMessage *msg;
1306         GSList *conns, *c;
1307
1308         g_return_if_fail (SOUP_IS_SESSION (session));
1309         priv = SOUP_SESSION_GET_PRIVATE (session);
1310
1311         for (msg = soup_message_queue_first (priv->queue, &iter);
1312              msg;
1313              msg = soup_message_queue_next (priv->queue, &iter)) {
1314                 soup_session_cancel_message (session, msg,
1315                                              SOUP_STATUS_CANCELLED);
1316         }
1317
1318         /* Close all connections */
1319         g_mutex_lock (priv->host_lock);
1320         conns = NULL;
1321         g_hash_table_foreach (priv->conns, gather_conns, &conns);
1322
1323         for (c = conns; c; c = c->next)
1324                 g_object_ref (c->data);
1325         g_mutex_unlock (priv->host_lock);
1326         for (c = conns; c; c = c->next) {
1327                 soup_connection_disconnect (c->data);
1328                 g_object_unref (c->data);
1329         }
1330
1331         g_slist_free (conns);
1332 }
1333
1334 void
1335 soup_session_add_feature (SoupSession *session, SoupSessionFeature *feature)
1336 {
1337         SoupSessionPrivate *priv;
1338
1339         g_return_if_fail (SOUP_IS_SESSION (session));
1340         g_return_if_fail (SOUP_IS_SESSION_FEATURE (feature));
1341
1342         priv = SOUP_SESSION_GET_PRIVATE (session);
1343         priv->features = g_slist_prepend (priv->features, g_object_ref (feature));
1344         soup_session_feature_attach (feature, session);
1345 }
1346
1347 void
1348 soup_session_add_feature_by_type (SoupSession *session, GType feature_type)
1349 {
1350         SoupSessionFeature *feature;
1351
1352         g_return_if_fail (SOUP_IS_SESSION (session));
1353         g_return_if_fail (g_type_is_a (feature_type, SOUP_TYPE_SESSION_FEATURE));
1354
1355         feature = g_object_new (feature_type, NULL);
1356         soup_session_add_feature (session, feature);
1357         g_object_unref (feature);
1358 }
1359
1360 void
1361 soup_session_remove_feature (SoupSession *session, SoupSessionFeature *feature)
1362 {
1363         SoupSessionPrivate *priv;
1364
1365         g_return_if_fail (SOUP_IS_SESSION (session));
1366
1367         priv = SOUP_SESSION_GET_PRIVATE (session);
1368         if (g_slist_find (priv->features, feature)) {
1369                 priv->features = g_slist_remove (priv->features, feature);
1370                 soup_session_feature_detach (feature, session);
1371                 g_object_unref (feature);
1372         }
1373 }
1374
1375 void
1376 soup_session_remove_feature_by_type (SoupSession *session, GType feature_type)
1377 {
1378         SoupSessionPrivate *priv;
1379         GSList *f;
1380
1381         g_return_if_fail (SOUP_IS_SESSION (session));
1382
1383         priv = SOUP_SESSION_GET_PRIVATE (session);
1384 restart:
1385         for (f = priv->features; f; f = f->next) {
1386                 if (G_TYPE_CHECK_INSTANCE_TYPE (f->data, feature_type)) {
1387                         soup_session_remove_feature (session, f->data);
1388                         goto restart;
1389                 }
1390         }
1391 }