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-address.h"
  17 #include "soup-auth.h"
  18 #include "soup-auth-basic.h"
  19 #include "soup-auth-digest.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-misc.h"
  26 #include "soup-proxy-resolver-static.h"
  27 #include "soup-proxy-uri-resolver.h"
  28 #include "soup-session.h"
  29 #include "soup-session-feature.h"
  30 #include "soup-session-private.h"
  31 #include "soup-socket.h"
  32 #include "soup-ssl.h"
  33 #include "soup-uri.h"
  34 /*TIZEN patch*/
  35 #include "TIZEN.h"
  36
  37 /**
  38  * SECTION:soup-session
  39  * @short_description: Soup session state object
  40  *
  41  * #SoupSession is the object that controls client-side HTTP. A
  42  * #SoupSession encapsulates all of the state that libsoup is keeping
  43  * on behalf of your program; cached HTTP connections, authentication
  44  * information, etc.
  45  *
  46  * Most applications will only need a single #SoupSession; the primary
  47  * reason you might need multiple sessions is if you need to have
  48  * multiple independent authentication contexts. (Eg, you are
  49  * connecting to a server and authenticating as two different users at
  50  * different times; the easiest way to ensure that each #SoupMessage
  51  * is sent with the authentication information you intended is to use
  52  * one session for the first user, and a second session for the other
  53  * user.)
  54  *
  55  * #SoupSession itself is an abstract class, with two subclasses. If
  56  * you are using the glib main loop, you will generally want to use
  57  * #SoupSessionAsync, which uses non-blocking I/O and callbacks. On
  58  * the other hand, if your application is threaded and you want to do
  59  * synchronous I/O in a separate thread from the UI, use
  60  * #SoupSessionSync.
  61  **/
  62
  63 typedef struct {
  64         SoupURI     *uri;
  65         SoupAddress *addr;
  66
  67         GSList      *connections;      /* CONTAINS: SoupConnection */
  68         guint        num_conns;
  69
  70         guint        num_messages;
  71
  72         gboolean     ssl_fallback;
  73 } SoupSessionHost;
  74
  75 typedef struct {
  76         char *ssl_ca_file;
  77         SoupSSLCredentials *ssl_creds;
  78         gboolean ssl_strict;
  79
  80         SoupMessageQueue *queue;
  81
  82         char *user_agent;
  83         char *accept_language;
  84         gboolean accept_language_auto;
  85
  86         GSList *features;
  87         GHashTable *features_cache;
  88
  89         GHashTable *hosts; /* char* -> SoupSessionHost */
  90         GHashTable *conns; /* SoupConnection -> SoupSessionHost */
  91         guint num_conns;
  92         guint max_conns, max_conns_per_host;
  93         guint io_timeout, idle_timeout;
  94
  95         /* Must hold the host_lock before potentially creating a
  96          * new SoupSessionHost, or adding/removing a connection.
  97          * Must not emit signals or destroy objects while holding it.
  98          */
  99         GMutex *host_lock;
 100
 101         GMainContext *async_context;
 102
 103         GResolver *resolver;
 104 } SoupSessionPrivate;
 105 #define SOUP_SESSION_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), SOUP_TYPE_SESSION, SoupSessionPrivate))
 106
 107 static void     free_host      (SoupSessionHost *host);
 108
 109 static void queue_message   (SoupSession *session, SoupMessage *msg,
 110                              SoupSessionCallback callback, gpointer user_data);
 111 static void requeue_message (SoupSession *session, SoupMessage *msg);
 112 static void cancel_message  (SoupSession *session, SoupMessage *msg,
 113                              guint status_code);
 114 static void auth_required   (SoupSession *session, SoupMessage *msg,
 115                              SoupAuth *auth, gboolean retrying);
 116 static void flush_queue     (SoupSession *session);
 117
 118 static void auth_manager_authenticate (SoupAuthManager *manager,
 119                                        SoupMessage *msg, SoupAuth *auth,
 120                                        gboolean retrying, gpointer user_data);
 121
 122 #define SOUP_SESSION_MAX_CONNS_DEFAULT 10
 123 #define SOUP_SESSION_MAX_CONNS_PER_HOST_DEFAULT 2
 124
 125 #define SOUP_SESSION_MAX_REDIRECTION_COUNT 20
 126
 127 #define SOUP_SESSION_USER_AGENT_BASE "libsoup/" PACKAGE_VERSION
 128
 129 G_DEFINE_ABSTRACT_TYPE (SoupSession, soup_session, G_TYPE_OBJECT)
 130
 131 enum {
 132         REQUEST_QUEUED,
 133         REQUEST_STARTED,
 134         REQUEST_UNQUEUED,
 135         AUTHENTICATE,
 136         CONNECTION_CREATED,
 137         TUNNELING,
 138         LAST_SIGNAL
 139 };
 140
 141 static guint signals[LAST_SIGNAL] = { 0 };
 142
 143 enum {
 144         PROP_0,
 145
 146         PROP_PROXY_URI,
 147         PROP_MAX_CONNS,
 148         PROP_MAX_CONNS_PER_HOST,
 149         PROP_USE_NTLM,
 150         PROP_SSL_CA_FILE,
 151         PROP_SSL_STRICT,
 152         PROP_ASYNC_CONTEXT,
 153         PROP_TIMEOUT,
 154         PROP_USER_AGENT,
 155         PROP_ACCEPT_LANGUAGE,
 156         PROP_ACCEPT_LANGUAGE_AUTO,
 157         PROP_IDLE_TIMEOUT,
 158         PROP_ADD_FEATURE,
 159         PROP_ADD_FEATURE_BY_TYPE,
 160         PROP_REMOVE_FEATURE_BY_TYPE,
 161
 162         LAST_PROP
 163 };
 164
 165 static void set_property (GObject *object, guint prop_id,
 166                           const GValue *value, GParamSpec *pspec);
 167 static void get_property (GObject *object, guint prop_id,
 168                           GValue *value, GParamSpec *pspec);
 169
 170 static void
 171 soup_session_init (SoupSession *session)
 172 {
 173         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 174         SoupAuthManager *auth_manager;
 175
 176         priv->queue = soup_message_queue_new (session);
 177
 178         priv->host_lock = g_mutex_new ();
 179         priv->hosts = g_hash_table_new_full (soup_uri_host_hash,
 180                                              soup_uri_host_equal,
 181                                              NULL, (GDestroyNotify)free_host);
 182         priv->conns = g_hash_table_new (NULL, NULL);
 183
 184         priv->max_conns = SOUP_SESSION_MAX_CONNS_DEFAULT;
 185         priv->max_conns_per_host = SOUP_SESSION_MAX_CONNS_PER_HOST_DEFAULT;
 186
 187         priv->features_cache = g_hash_table_new (NULL, NULL);
 188
 189         auth_manager = g_object_new (SOUP_TYPE_AUTH_MANAGER_NTLM, NULL);
 190         g_signal_connect (auth_manager, "authenticate",
 191                           G_CALLBACK (auth_manager_authenticate), session);
 192         soup_session_feature_add_feature (SOUP_SESSION_FEATURE (auth_manager),
 193                                           SOUP_TYPE_AUTH_BASIC);
 194         soup_session_feature_add_feature (SOUP_SESSION_FEATURE (auth_manager),
 195                                           SOUP_TYPE_AUTH_DIGEST);
 196         soup_session_add_feature (session, SOUP_SESSION_FEATURE (auth_manager));
 197         g_object_unref (auth_manager);
 198
 199         /* We'll be doing DNS continuously-ish while the session is active,
 200          * so hold a ref on the default GResolver.
 201          */
 202         priv->resolver = g_resolver_get_default ();
 203
 204         priv->ssl_strict = TRUE;
 205 }
 206
 207 static void
 208 dispose (GObject *object)
 209 {
 210         SoupSession *session = SOUP_SESSION (object);
 211         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 212
 213         soup_session_abort (session);
 214
 215         while (priv->features)
 216                 soup_session_remove_feature (session, priv->features->data);
 217
 218         G_OBJECT_CLASS (soup_session_parent_class)->dispose (object);
 219 }
 220
 221 static void
 222 finalize (GObject *object)
 223 {
 224         SoupSession *session = SOUP_SESSION (object);
 225         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 226
 227         soup_message_queue_destroy (priv->queue);
 228
 229         g_mutex_free (priv->host_lock);
 230         g_hash_table_destroy (priv->hosts);
 231         g_hash_table_destroy (priv->conns);
 232
 233         g_free (priv->user_agent);
 234         g_free (priv->accept_language);
 235
 236         if (priv->ssl_ca_file)
 237                 g_free (priv->ssl_ca_file);
 238         if (priv->ssl_creds)
 239                 soup_ssl_free_client_credentials (priv->ssl_creds);
 240
 241         if (priv->async_context)
 242                 g_main_context_unref (priv->async_context);
 243
 244         g_hash_table_destroy (priv->features_cache);
 245
 246         g_object_unref (priv->resolver);
 247
 248         G_OBJECT_CLASS (soup_session_parent_class)->finalize (object);
 249 }
 250
 251 static void
 252 soup_session_class_init (SoupSessionClass *session_class)
 253 {
 254         GObjectClass *object_class = G_OBJECT_CLASS (session_class);
 255
 256         g_type_class_add_private (session_class, sizeof (SoupSessionPrivate));
 257
 258         /* virtual method definition */
 259         session_class->queue_message = queue_message;
 260         session_class->requeue_message = requeue_message;
 261         session_class->cancel_message = cancel_message;
 262         session_class->auth_required = auth_required;
 263         session_class->flush_queue = flush_queue;
 264
 265         /* virtual method override */
 266         object_class->dispose = dispose;
 267         object_class->finalize = finalize;
 268         object_class->set_property = set_property;
 269         object_class->get_property = get_property;
 270
 271         /* signals */
 272
 273         /**
 274          * SoupSession::request-queued:
 275          * @session: the session
 276          * @msg: the request that was queued
 277          *
 278          * Emitted when a request is queued on @session. (Note that
 279          * "queued" doesn't just mean soup_session_queue_message();
 280          * soup_session_send_message() implicitly queues the message
 281          * as well.)
 282          *
 283          * When sending a request, first #SoupSession::request_queued
 284          * is emitted, indicating that the session has become aware of
 285          * the request.
 286          *
 287          * Once a connection is available to send the request on, the
 288          * session emits #SoupSession::request_started. Then, various
 289          * #SoupMessage signals are emitted as the message is
 290          * processed. If the message is requeued, it will emit
 291          * #SoupMessage::restarted, which will then be followed by
 292          * another #SoupSession::request_started and another set of
 293          * #SoupMessage signals when the message is re-sent.
 294          *
 295          * Eventually, the message will emit #SoupMessage::finished.
 296          * Normally, this signals the completion of message
 297          * processing. However, it is possible that the application
 298          * will requeue the message from the "finished" handler (or
 299          * equivalently, from the soup_session_queue_message()
 300          * callback). In that case, the process will loop back to
 301          * #SoupSession::request_started.
 302          *
 303          * Eventually, a message will reach "finished" and not be
 304          * requeued. At that point, the session will emit
 305          * #SoupSession::request_unqueued to indicate that it is done
 306          * with the message.
 307          *
 308          * To sum up: #SoupSession::request_queued and
 309          * #SoupSession::request_unqueued are guaranteed to be emitted
 310          * exactly once, but #SoupSession::request_started and
 311          * #SoupMessage::finished (and all of the other #SoupMessage
 312          * signals) may be invoked multiple times for a given message.
 313          *
 314          * Since: 2.4.1
 315          **/
 316         signals[REQUEST_QUEUED] =
 317                 g_signal_new ("request-queued",
 318                               G_OBJECT_CLASS_TYPE (object_class),
 319                               G_SIGNAL_RUN_FIRST,
 320                               0, /* FIXME? */
 321                               NULL, NULL,
 322                               soup_marshal_NONE__OBJECT,
 323                               G_TYPE_NONE, 1,
 324                               SOUP_TYPE_MESSAGE);
 325
 326         /**
 327          * SoupSession::request-started:
 328          * @session: the session
 329          * @msg: the request being sent
 330          * @socket: the socket the request is being sent on
 331          *
 332          * Emitted just before a request is sent. See
 333          * #SoupSession::request_queued for a detailed description of
 334          * the message lifecycle within a session.
 335          **/
 336         signals[REQUEST_STARTED] =
 337                 g_signal_new ("request-started",
 338                               G_OBJECT_CLASS_TYPE (object_class),
 339                               G_SIGNAL_RUN_FIRST,
 340                               G_STRUCT_OFFSET (SoupSessionClass, request_started),
 341                               NULL, NULL,
 342                               soup_marshal_NONE__OBJECT_OBJECT,
 343                               G_TYPE_NONE, 2,
 344                               SOUP_TYPE_MESSAGE,
 345                               SOUP_TYPE_SOCKET);
 346
 347         /**
 348          * SoupSession::request-unqueued:
 349          * @session: the session
 350          * @msg: the request that was unqueued
 351          *
 352          * Emitted when a request is removed from @session's queue,
 353          * indicating that @session is done with it. See
 354          * #SoupSession::request_queued for a detailed description of the
 355          * message lifecycle within a session.
 356          *
 357          * Since: 2.4.1
 358          **/
 359         signals[REQUEST_UNQUEUED] =
 360                 g_signal_new ("request-unqueued",
 361                               G_OBJECT_CLASS_TYPE (object_class),
 362                               G_SIGNAL_RUN_FIRST,
 363                               0, /* FIXME? */
 364                               NULL, NULL,
 365                               soup_marshal_NONE__OBJECT,
 366                               G_TYPE_NONE, 1,
 367                               SOUP_TYPE_MESSAGE);
 368
 369         /**
 370          * SoupSession::authenticate:
 371          * @session: the session
 372          * @msg: the #SoupMessage being sent
 373          * @auth: the #SoupAuth to authenticate
 374          * @retrying: %TRUE if this is the second (or later) attempt
 375          *
 376          * Emitted when the session requires authentication. If
 377          * credentials are available call soup_auth_authenticate() on
 378          * @auth. If these credentials fail, the signal will be
 379          * emitted again, with @retrying set to %TRUE, which will
 380          * continue until you return without calling
 381          * soup_auth_authenticate() on @auth.
 382          *
 383          * Note that this may be emitted before @msg's body has been
 384          * fully read.
 385          *
 386          * If you call soup_session_pause_message() on @msg before
 387          * returning, then you can authenticate @auth asynchronously
 388          * (as long as you g_object_ref() it to make sure it doesn't
 389          * get destroyed), and then unpause @msg when you are ready
 390          * for it to continue.
 391          **/
 392         signals[AUTHENTICATE] =
 393                 g_signal_new ("authenticate",
 394                               G_OBJECT_CLASS_TYPE (object_class),
 395                               G_SIGNAL_RUN_FIRST,
 396                               G_STRUCT_OFFSET (SoupSessionClass, authenticate),
 397                               NULL, NULL,
 398                               soup_marshal_NONE__OBJECT_OBJECT_BOOLEAN,
 399                               G_TYPE_NONE, 3,
 400                               SOUP_TYPE_MESSAGE,
 401                               SOUP_TYPE_AUTH,
 402                               G_TYPE_BOOLEAN);
 403
 404         signals[CONNECTION_CREATED] =
 405                 g_signal_new ("connection-created",
 406                               G_OBJECT_CLASS_TYPE (object_class),
 407                               G_SIGNAL_RUN_FIRST,
 408                               0,
 409                               NULL, NULL,
 410                               soup_marshal_NONE__OBJECT,
 411                               G_TYPE_NONE, 1,
 412                               /* SoupConnection is private, so we can't use
 413                                * SOUP_TYPE_CONNECTION here.
 414                                */
 415                               G_TYPE_OBJECT);
 416
 417         signals[TUNNELING] =
 418                 g_signal_new ("tunneling",
 419                               G_OBJECT_CLASS_TYPE (object_class),
 420                               G_SIGNAL_RUN_FIRST,
 421                               0,
 422                               NULL, NULL,
 423                               soup_marshal_NONE__OBJECT,
 424                               G_TYPE_NONE, 1,
 425                               /* SoupConnection is private, so we can't use
 426                                * SOUP_TYPE_CONNECTION here.
 427                                */
 428                               G_TYPE_OBJECT);
 429
 430
 431         /* properties */
 432         /**
 433          * SOUP_SESSION_PROXY_URI:
 434          *
 435          * Alias for the #SoupSession:proxy-uri property. (The HTTP
 436          * proxy to use for this session.)
 437          **/
 438         g_object_class_install_property (
 439                 object_class, PROP_PROXY_URI,
 440                 g_param_spec_boxed (SOUP_SESSION_PROXY_URI,
 441                                     "Proxy URI",
 442                                     "The HTTP Proxy to use for this session",
 443                                     SOUP_TYPE_URI,
 444                                     G_PARAM_READWRITE));
 445         /**
 446          * SOUP_SESSION_MAX_CONNS:
 447          *
 448          * Alias for the #SoupSession:max-conns property. (The maximum
 449          * number of connections that the session can open at once.)
 450          **/
 451         g_object_class_install_property (
 452                 object_class, PROP_MAX_CONNS,
 453                 g_param_spec_int (SOUP_SESSION_MAX_CONNS,
 454                                   "Max Connection Count",
 455                                   "The maximum number of connections that the session can open at once",
 456                                   1,
 457                                   G_MAXINT,
 458                                   SOUP_SESSION_MAX_CONNS_DEFAULT,
 459                                   G_PARAM_READWRITE));
 460         /**
 461          * SOUP_SESSION_MAX_CONNS_PER_HOST:
 462          *
 463          * Alias for the #SoupSession:max-conns-per-host property.
 464          * (The maximum number of connections that the session can
 465          * open at once to a given host.)
 466          **/
 467         g_object_class_install_property (
 468                 object_class, PROP_MAX_CONNS_PER_HOST,
 469                 g_param_spec_int (SOUP_SESSION_MAX_CONNS_PER_HOST,
 470                                   "Max Per-Host Connection Count",
 471                                   "The maximum number of connections that the session can open at once to a given host",
 472                                   1,
 473                                   G_MAXINT,
 474                                   SOUP_SESSION_MAX_CONNS_PER_HOST_DEFAULT,
 475                                   G_PARAM_READWRITE));
 476         /**
 477          * SoupSession:idle-timeout:
 478          *
 479          * Connection lifetime when idle
 480          *
 481          * Since: 2.4.1
 482          **/
 483         /**
 484          * SOUP_SESSION_IDLE_TIMEOUT:
 485          *
 486          * Alias for the #SoupSession:idle-timeout property. (The idle
 487          * connection lifetime.)
 488          *
 489          * Since: 2.4.1
 490          **/
 491         g_object_class_install_property (
 492                 object_class, PROP_IDLE_TIMEOUT,
 493                 g_param_spec_uint (SOUP_SESSION_IDLE_TIMEOUT,
 494                                    "Idle Timeout",
 495                                    "Connection lifetime when idle",
 496                                    0, G_MAXUINT, 0,
 497                                    G_PARAM_READWRITE));
 498         /**
 499          * SoupSession:use-ntlm:
 500          *
 501          * Whether or not to use NTLM authentication.
 502          *
 503          * Deprecated: use soup_session_add_feature_by_type() with
 504          * #SOUP_TYPE_AUTH_NTLM.
 505          **/
 506         /**
 507          * SOUP_SESSION_USE_NTLM:
 508          *
 509          * Alias for the #SoupSession:use-ntlm property. (Whether or
 510          * not to use NTLM authentication.)
 511          **/
 512         g_object_class_install_property (
 513                 object_class, PROP_USE_NTLM,
 514                 g_param_spec_boolean (SOUP_SESSION_USE_NTLM,
 515                                       "Use NTLM",
 516                                       "Whether or not to use NTLM authentication",
 517                                       FALSE,
 518                                       G_PARAM_READWRITE));
 519         /**
 520          * SOUP_SESSION_SSL_CA_FILE:
 521          *
 522          * Alias for the #SoupSession:ssl-ca-file property. (File
 523          * containing SSL CA certificates.)
 524          **/
 525         g_object_class_install_property (
 526                 object_class, PROP_SSL_CA_FILE,
 527                 g_param_spec_string (SOUP_SESSION_SSL_CA_FILE,
 528                                      "SSL CA file",
 529                                      "File containing SSL CA certificates",
 530                                      NULL,
 531                                      G_PARAM_READWRITE));
 532         /**
 533          * SOUP_SESSION_SSL_STRICT:
 534          *
 535          * Alias for the #SoupSession:ignore-ssl-cert-errors
 536          * property. By default, when validating certificates against
 537          * a CA file, Soup will consider invalid certificates as a
 538          * connection error. Setting this property to %TRUE makes soup
 539          * ignore the errors, and make the connection.
 540          *
 541          * Since: 2.30
 542          **/
 543         g_object_class_install_property (
 544                 object_class, PROP_SSL_STRICT,
 545                 g_param_spec_boolean (SOUP_SESSION_SSL_STRICT,
 546                                       "Strictly validate SSL certificates",
 547                                       "Whether certificate errors should be considered a connection error",
 548                                       TRUE,
 549                                       G_PARAM_READWRITE));
 550         /**
 551          * SOUP_SESSION_ASYNC_CONTEXT:
 552          *
 553          * Alias for the #SoupSession:async-context property. (The
 554          * session's #GMainContext.)
 555          **/
 556         g_object_class_install_property (
 557                 object_class, PROP_ASYNC_CONTEXT,
 558                 g_param_spec_pointer (SOUP_SESSION_ASYNC_CONTEXT,
 559                                       "Async GMainContext",
 560                                       "The GMainContext to dispatch async I/O in",
 561                                       G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 562         /**
 563          * SOUP_SESSION_TIMEOUT:
 564          *
 565          * Alias for the #SoupSession:timeout property. (The timeout
 566          * in seconds for blocking socket I/O operations.)
 567          **/
 568         g_object_class_install_property (
 569                 object_class, PROP_TIMEOUT,
 570                 g_param_spec_uint (SOUP_SESSION_TIMEOUT,
 571                                    "Timeout value",
 572                                    "Value in seconds to timeout a blocking I/O",
 573                                    0, G_MAXUINT, 0,
 574                                    G_PARAM_READWRITE));
 575
 576         /**
 577          * SoupSession:user-agent:
 578          *
 579          * If non-%NULL, the value to use for the "User-Agent" header
 580          * on #SoupMessage<!-- -->s sent from this session.
 581          *
 582          * RFC 2616 says: "The User-Agent request-header field
 583          * contains information about the user agent originating the
 584          * request. This is for statistical purposes, the tracing of
 585          * protocol violations, and automated recognition of user
 586          * agents for the sake of tailoring responses to avoid
 587          * particular user agent limitations. User agents SHOULD
 588          * include this field with requests."
 589          *
 590          * The User-Agent header contains a list of one or more
 591          * product tokens, separated by whitespace, with the most
 592          * significant product token coming first. The tokens must be
 593          * brief, ASCII, and mostly alphanumeric (although "-", "_",
 594          * and "." are also allowed), and may optionally include a "/"
 595          * followed by a version string. You may also put comments,
 596          * enclosed in parentheses, between or after the tokens.
 597          *
 598          * If you set a %user_agent property that has trailing
 599          * whitespace, #SoupSession will append its own product token
 600          * (eg, "<literal>libsoup/2.3.2</literal>") to the end of the
 601          * header for you.
 602          **/
 603         /**
 604          * SOUP_SESSION_USER_AGENT:
 605          *
 606          * Alias for the #SoupSession:user-agent property, qv.
 607          **/
 608         g_object_class_install_property (
 609                 object_class, PROP_USER_AGENT,
 610                 g_param_spec_string (SOUP_SESSION_USER_AGENT,
 611                                      "User-Agent string",
 612                                      "User-Agent string",
 613                                      NULL,
 614                                      G_PARAM_READWRITE));
 615
 616         /**
 617          * SoupSession:accept-language:
 618          *
 619          * If non-%NULL, the value to use for the "Accept-Language" header
 620          * on #SoupMessage<!-- -->s sent from this session.
 621          *
 622          * Setting this will disable
 623          * #SoupSession:accept-language-auto.
 624          *
 625          * Since: 2.30
 626          **/
 627         /**
 628          * SOUP_SESSION_ACCEPT_LANGUAGE:
 629          *
 630          * Alias for the #SoupSession:accept-language property, qv.
 631          *
 632          * Since: 2.30
 633          **/
 634         g_object_class_install_property (
 635                 object_class, PROP_ACCEPT_LANGUAGE,
 636                 g_param_spec_string (SOUP_SESSION_ACCEPT_LANGUAGE,
 637                                      "Accept-Language string",
 638                                      "Accept-Language string",
 639                                      NULL,
 640                                      G_PARAM_READWRITE));
 641
 642         /**
 643          * SoupSession:accept-language-auto:
 644          *
 645          * If %TRUE, #SoupSession will automatically set the string
 646          * for the "Accept-Language" header on every #SoupMessage
 647          * sent, based on the return value of g_get_language_names().
 648          *
 649          * Setting this will override any previous value of
 650          * #SoupSession:accept-language.
 651          *
 652          * Since: 2.30
 653          **/
 654         /**
 655          * SOUP_SESSION_ACCEPT_LANGUAGE_AUTO:
 656          *
 657          * Alias for the #SoupSession:accept-language-auto property, qv.
 658          *
 659          * Since: 2.30
 660          **/
 661         g_object_class_install_property (
 662                 object_class, PROP_ACCEPT_LANGUAGE_AUTO,
 663                 g_param_spec_boolean (SOUP_SESSION_ACCEPT_LANGUAGE_AUTO,
 664                                       "Accept-Language automatic mode",
 665                                       "Accept-Language automatic mode",
 666                                       FALSE,
 667                                       G_PARAM_READWRITE));
 668
 669         /**
 670          * SoupSession:add-feature: (skip)
 671          *
 672          * Add a feature object to the session. (Shortcut for calling
 673          * soup_session_add_feature().)
 674          *
 675          * Since: 2.24
 676          **/
 677         /**
 678          * SOUP_SESSION_ADD_FEATURE: (skip)
 679          *
 680          * Alias for the #SoupSession:add-feature property. (Shortcut
 681          * for calling soup_session_add_feature().
 682          *
 683          * Since: 2.24
 684          **/
 685         g_object_class_install_property (
 686                 object_class, PROP_ADD_FEATURE,
 687                 g_param_spec_object (SOUP_SESSION_ADD_FEATURE,
 688                                      "Add Feature",
 689                                      "Add a feature object to the session",
 690                                      SOUP_TYPE_SESSION_FEATURE,
 691                                      G_PARAM_READWRITE));
 692         /**
 693          * SoupSession:add-feature-by-type: (skip)
 694          *
 695          * Add a feature object of the given type to the session.
 696          * (Shortcut for calling soup_session_add_feature_by_type().)
 697          *
 698          * Since: 2.24
 699          **/
 700         /**
 701          * SOUP_SESSION_ADD_FEATURE_BY_TYPE: (skip)
 702          *
 703          * Alias for the #SoupSession:add-feature-by-type property.
 704          * (Shortcut for calling soup_session_add_feature_by_type().
 705          *
 706          * Since: 2.24
 707          **/
 708         g_object_class_install_property (
 709                 object_class, PROP_ADD_FEATURE_BY_TYPE,
 710                 g_param_spec_gtype (SOUP_SESSION_ADD_FEATURE_BY_TYPE,
 711                                     "Add Feature By Type",
 712                                     "Add a feature object of the given type to the session",
 713                                     SOUP_TYPE_SESSION_FEATURE,
 714                                     G_PARAM_READWRITE));
 715         /**
 716          * SoupSession:remove-feature-by-type: (skip)
 717          *
 718          * Remove feature objects from the session. (Shortcut for
 719          * calling soup_session_remove_feature_by_type().)
 720          *
 721          * Since: 2.24
 722          **/
 723         /**
 724          * SOUP_SESSION_REMOVE_FEATURE_BY_TYPE: (skip)
 725          *
 726          * Alias for the #SoupSession:remove-feature-by-type
 727          * property. (Shortcut for calling
 728          * soup_session_remove_feature_by_type().
 729          *
 730          * Since: 2.24
 731          **/
 732         g_object_class_install_property (
 733                 object_class, PROP_REMOVE_FEATURE_BY_TYPE,
 734                 g_param_spec_gtype (SOUP_SESSION_REMOVE_FEATURE_BY_TYPE,
 735                                     "Remove Feature By Type",
 736                                     "Remove features of the given type from the session",
 737                                     SOUP_TYPE_SESSION_FEATURE,
 738                                     G_PARAM_READWRITE));
 739 }
 740
 741 static gboolean
 742 safe_str_equal (const char *a, const char *b)
 743 {
 744         if (!a && !b)
 745                 return TRUE;
 746
 747         if ((a && !b) || (b && !a))
 748                 return FALSE;
 749
 750         return strcmp (a, b) == 0;
 751 }
 752
 753 /* Converts a language in POSIX format and to be RFC2616 compliant    */
 754 /* Based on code from epiphany-webkit (ephy_langs_append_languages()) */
 755 static gchar *
 756 posix_lang_to_rfc2616 (const gchar *language)
 757 {
 758         /* Don't include charset variants, etc */
 759         if (strchr (language, '.') || strchr (language, '@'))
 760                 return NULL;
 761
 762         /* Ignore "C" locale, which g_get_language_names() always
 763          * includes as a fallback.
 764          */
 765         if (!strcmp (language, "C"))
 766                 return NULL;
 767
 768         return g_strdelimit (g_ascii_strdown (language, -1), "_", '-');
 769 }
 770
 771 /* Converts @quality from 0-100 to 0.0-1.0 and appends to @str */
 772 static gchar *
 773 add_quality_value (const gchar *str, int quality)
 774 {
 775         g_return_val_if_fail (str != NULL, NULL);
 776
 777         if (quality >= 0 && quality < 100) {
 778                 /* We don't use %.02g because of "." vs "," locale issues */
 779                 if (quality % 10)
 780                         return g_strdup_printf ("%s;q=0.%02d", str, quality);
 781                 else
 782                         return g_strdup_printf ("%s;q=0.%d", str, quality / 10);
 783         } else
 784                 return g_strdup (str);
 785 }
 786
 787 /* Returns a RFC2616 compliant languages list from system locales */
 788 static gchar *
 789 accept_languages_from_system (void)
 790 {
 791         const char * const * lang_names;
 792         GPtrArray *langs = NULL;
 793         char *lang, **langs_array, *langs_str;
 794         int delta;
 795         int i;
 796
 797         lang_names = g_get_language_names ();
 798         g_return_val_if_fail (lang_names != NULL, NULL);
 799
 800         /* Build the array of languages */
 801         langs = g_ptr_array_new ();
 802         for (i = 0; lang_names[i] != NULL; i++) {
 803                 lang = posix_lang_to_rfc2616 (lang_names[i]);
 804                 if (lang)
 805                         g_ptr_array_add (langs, lang);
 806         }
 807
 808         /* Add quality values */
 809         if (langs->len < 10)
 810                 delta = 10;
 811         else if (langs->len < 20)
 812                 delta = 5;
 813         else
 814                 delta = 1;
 815
 816         for (i = 0; i < langs->len; i++) {
 817                 lang = langs->pdata[i];
 818                 langs->pdata[i] = add_quality_value (lang, 100 - i * delta);
 819                 g_free (lang);
 820         }
 821
 822         /* Fallback: add "en" if list is empty */
 823         if (langs->len == 0)
 824                 g_ptr_array_add (langs, g_strdup ("en"));
 825
 826         g_ptr_array_add (langs, NULL);
 827         langs_array = (char **)langs->pdata;
 828         langs_str = g_strjoinv (", ", langs_array);
 829
 830         g_strfreev (langs_array);
 831         g_ptr_array_free (langs, FALSE);
 832
 833         return langs_str;
 834 }
 835
 836 static void
 837 set_property (GObject *object, guint prop_id,
 838               const GValue *value, GParamSpec *pspec)
 839 {
 840         SoupSession *session = SOUP_SESSION (object);
 841         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 842         SoupURI *uri;
 843         gboolean ca_file_changed = FALSE;
 844         const char *new_ca_file, *user_agent;
 845         SoupSessionFeature *feature;
 846
 847         switch (prop_id) {
 848         case PROP_PROXY_URI:
 849                 uri = g_value_get_boxed (value);
 850
 851                 if (uri) {
 852                         soup_session_remove_feature_by_type (session, SOUP_TYPE_PROXY_RESOLVER);
 853                         feature = SOUP_SESSION_FEATURE (soup_proxy_resolver_static_new (uri));
 854                         soup_session_add_feature (session, feature);
 855                         g_object_unref (feature);
 856                 } else
 857                         soup_session_remove_feature_by_type (session, SOUP_TYPE_PROXY_RESOLVER_STATIC);
 858
 859                 soup_session_abort (session);
 860                 break;
 861         case PROP_MAX_CONNS:
 862                 priv->max_conns = g_value_get_int (value);
 863                 break;
 864         case PROP_MAX_CONNS_PER_HOST:
 865                 priv->max_conns_per_host = g_value_get_int (value);
 866                 break;
 867         case PROP_USE_NTLM:
 868                 feature = soup_session_get_feature (session, SOUP_TYPE_AUTH_MANAGER_NTLM);
 869                 if (feature) {
 870                         if (g_value_get_boolean (value))
 871                                 soup_session_feature_add_feature (feature, SOUP_TYPE_AUTH_NTLM);
 872                         else
 873                                 soup_session_feature_remove_feature (feature, SOUP_TYPE_AUTH_NTLM);
 874                 } else
 875                         g_warning ("Trying to set use-ntlm on session with no auth-manager");
 876                 break;
 877         case PROP_SSL_CA_FILE:
 878                 new_ca_file = g_value_get_string (value);
 879
 880                 if (!safe_str_equal (priv->ssl_ca_file, new_ca_file))
 881                         ca_file_changed = TRUE;
 882
 883                 g_free (priv->ssl_ca_file);
 884                 priv->ssl_ca_file = g_strdup (new_ca_file);
 885
 886                 if (ca_file_changed && priv->ssl_creds) {
 887                         soup_ssl_free_client_credentials (priv->ssl_creds);
 888                         priv->ssl_creds = NULL;
 889                 }
 890
 891                 break;
 892         case PROP_SSL_STRICT:
 893                 priv->ssl_strict = g_value_get_boolean (value);
 894                 break;
 895         case PROP_ASYNC_CONTEXT:
 896                 priv->async_context = g_value_get_pointer (value);
 897                 if (priv->async_context)
 898                         g_main_context_ref (priv->async_context);
 899                 break;
 900         case PROP_TIMEOUT:
 901                 priv->io_timeout = g_value_get_uint (value);
 902                 break;
 903         case PROP_USER_AGENT:
 904                 g_free (priv->user_agent);
 905                 user_agent = g_value_get_string (value);
 906                 if (!user_agent)
 907                         priv->user_agent = NULL;
 908                 else if (!*user_agent) {
 909                         priv->user_agent =
 910                                 g_strdup (SOUP_SESSION_USER_AGENT_BASE);
 911                 } else if (g_str_has_suffix (user_agent, " ")) {
 912                         priv->user_agent =
 913                                 g_strdup_printf ("%s%s", user_agent,
 914                                                  SOUP_SESSION_USER_AGENT_BASE);
 915                 } else
 916                         priv->user_agent = g_strdup (user_agent);
 917                 break;
 918         case PROP_ACCEPT_LANGUAGE:
 919                 g_free (priv->accept_language);
 920                 priv->accept_language = g_strdup (g_value_get_string (value));
 921                 priv->accept_language_auto = FALSE;
 922                 break;
 923         case PROP_ACCEPT_LANGUAGE_AUTO:
 924                 priv->accept_language_auto = g_value_get_boolean (value);
 925                 if (priv->accept_language) {
 926                         g_free (priv->accept_language);
 927                         priv->accept_language = NULL;
 928                 }
 929
 930                 /* Get languages from system if needed */
 931                 if (priv->accept_language_auto)
 932                         priv->accept_language = accept_languages_from_system ();
 933                 break;
 934         case PROP_IDLE_TIMEOUT:
 935                 priv->idle_timeout = g_value_get_uint (value);
 936                 break;
 937         case PROP_ADD_FEATURE:
 938                 soup_session_add_feature (session, g_value_get_object (value));
 939                 break;
 940         case PROP_ADD_FEATURE_BY_TYPE:
 941                 soup_session_add_feature_by_type (session, g_value_get_gtype (value));
 942                 break;
 943         case PROP_REMOVE_FEATURE_BY_TYPE:
 944                 soup_session_remove_feature_by_type (session, g_value_get_gtype (value));
 945                 break;
 946         default:
 947                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 948                 break;
 949         }
 950 }
 951
 952 static void
 953 get_property (GObject *object, guint prop_id,
 954               GValue *value, GParamSpec *pspec)
 955 {
 956         SoupSession *session = SOUP_SESSION (object);
 957         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
 958         SoupSessionFeature *feature;
 959
 960         switch (prop_id) {
 961         case PROP_PROXY_URI:
 962                 feature = soup_session_get_feature (session, SOUP_TYPE_PROXY_RESOLVER_STATIC);
 963                 if (feature) {
 964                         g_object_get_property (G_OBJECT (feature),
 965                                                SOUP_PROXY_RESOLVER_STATIC_PROXY_URI,
 966                                                value);
 967                 } else
 968                         g_value_set_boxed (value, NULL);
 969                 break;
 970         case PROP_MAX_CONNS:
 971                 g_value_set_int (value, priv->max_conns);
 972                 break;
 973         case PROP_MAX_CONNS_PER_HOST:
 974                 g_value_set_int (value, priv->max_conns_per_host);
 975                 break;
 976         case PROP_USE_NTLM:
 977                 feature = soup_session_get_feature (session, SOUP_TYPE_AUTH_MANAGER_NTLM);
 978                 if (feature)
 979                         g_value_set_boolean (value, soup_session_feature_has_feature (feature, SOUP_TYPE_AUTH_NTLM));
 980                 else
 981                         g_value_set_boolean (value, FALSE);
 982                 break;
 983         case PROP_SSL_CA_FILE:
 984                 g_value_set_string (value, priv->ssl_ca_file);
 985                 break;
 986         case PROP_SSL_STRICT:
 987                 g_value_set_boolean (value, priv->ssl_strict);
 988                 break;
 989         case PROP_ASYNC_CONTEXT:
 990                 g_value_set_pointer (value, priv->async_context ? g_main_context_ref (priv->async_context) : NULL);
 991                 break;
 992         case PROP_TIMEOUT:
 993                 g_value_set_uint (value, priv->io_timeout);
 994                 break;
 995         case PROP_USER_AGENT:
 996                 g_value_set_string (value, priv->user_agent);
 997                 break;
 998         case PROP_ACCEPT_LANGUAGE:
 999                 g_value_set_string (value, priv->accept_language);
1000                 break;
1001         case PROP_ACCEPT_LANGUAGE_AUTO:
1002                 g_value_set_boolean (value, priv->accept_language_auto);
1003                 break;
1004         case PROP_IDLE_TIMEOUT:
1005                 g_value_set_uint (value, priv->idle_timeout);
1006                 break;
1007         default:
1008                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1009                 break;
1010         }
1011 }
1012
1013
1014 /**
1015  * soup_session_get_async_context:
1016  * @session: a #SoupSession
1017  *
1018  * Gets @session's async_context. This does not add a ref to the
1019  * context, so you will need to ref it yourself if you want it to
1020  * outlive its session.
1021  *
1022  * Return value: (transfer none): @session's #GMainContext, which may
1023  * be %NULL
1024  **/
1025 GMainContext *
1026 soup_session_get_async_context (SoupSession *session)
1027 {
1028         SoupSessionPrivate *priv;
1029
1030         g_return_val_if_fail (SOUP_IS_SESSION (session), NULL);
1031         priv = SOUP_SESSION_GET_PRIVATE (session);
1032
1033         return priv->async_context;
1034 }
1035
1036 /* Hosts */
1037
1038 static SoupSessionHost *
1039 soup_session_host_new (SoupSession *session, SoupURI *uri)
1040 {
1041         SoupSessionHost *host;
1042
1043         host = g_slice_new0 (SoupSessionHost);
1044         host->uri = soup_uri_copy_host (uri);
1045         host->addr = soup_address_new (host->uri->host, host->uri->port);
1046
1047         return host;
1048 }
1049
1050 /* Requires host_lock to be locked */
1051 static SoupSessionHost *
1052 get_host_for_uri (SoupSession *session, SoupURI *uri)
1053 {
1054         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1055         SoupSessionHost *host;
1056
1057         host = g_hash_table_lookup (priv->hosts, uri);
1058         if (host)
1059                 return host;
1060
1061         host = soup_session_host_new (session, uri);
1062         g_hash_table_insert (priv->hosts, host->uri, host);
1063
1064         return host;
1065 }
1066
1067 /* Note: get_host_for_message doesn't lock the host_lock. The caller
1068  * must do it itself if there's a chance the host doesn't already
1069  * exist.
1070  */
1071 static SoupSessionHost *
1072 get_host_for_message (SoupSession *session, SoupMessage *msg)
1073 {
1074         return get_host_for_uri (session, soup_message_get_uri (msg));
1075 }
1076
1077 static void
1078 free_host (SoupSessionHost *host)
1079 {
1080         while (host->connections) {
1081                 SoupConnection *conn = host->connections->data;
1082
1083                 host->connections = g_slist_remove (host->connections, conn);
1084                 soup_connection_disconnect (conn);
1085         }
1086
1087         soup_uri_free (host->uri);
1088         g_object_unref (host->addr);
1089         g_slice_free (SoupSessionHost, host);
1090 }
1091
1092 static void
1093 auth_required (SoupSession *session, SoupMessage *msg,
1094                SoupAuth *auth, gboolean retrying)
1095 {
1096         g_signal_emit (session, signals[AUTHENTICATE], 0, msg, auth, retrying);
1097 }
1098
1099 static void
1100 auth_manager_authenticate (SoupAuthManager *manager, SoupMessage *msg,
1101                            SoupAuth *auth, gboolean retrying,
1102                            gpointer session)
1103 {
1104         SOUP_SESSION_GET_CLASS (session)->auth_required (
1105                 session, msg, auth, retrying);
1106 }
1107
1108 #define SOUP_METHOD_IS_SAFE(method) (method == SOUP_METHOD_GET || \
1109                                      method == SOUP_METHOD_HEAD || \
1110                                      method == SOUP_METHOD_OPTIONS || \
1111                                      method == SOUP_METHOD_PROPFIND)
1112
1113 static void
1114 redirect_handler (SoupMessage *msg, gpointer user_data)
1115 {
1116         SoupMessageQueueItem *item = user_data;
1117         SoupSession *session = item->session;
1118         const char *new_loc;
1119         SoupURI *new_uri;
1120
1121         new_loc = soup_message_headers_get_one (msg->response_headers,
1122                                                 "Location");
1123         g_return_if_fail (new_loc != NULL);
1124
1125         if (item->redirection_count >= SOUP_SESSION_MAX_REDIRECTION_COUNT) {
1126                 soup_session_cancel_message (session, msg, SOUP_STATUS_TOO_MANY_REDIRECTS);
1127                 return;
1128         }
1129         item->redirection_count++;
1130
1131         if (msg->status_code == SOUP_STATUS_SEE_OTHER ||
1132             (msg->status_code == SOUP_STATUS_FOUND &&
1133              !SOUP_METHOD_IS_SAFE (msg->method)) ||
1134             (msg->status_code == SOUP_STATUS_MOVED_PERMANENTLY &&
1135              msg->method == SOUP_METHOD_POST)) {
1136                 if (msg->method != SOUP_METHOD_HEAD) {
1137                         /* Redirect using a GET */
1138                         g_object_set (msg,
1139                                       SOUP_MESSAGE_METHOD, SOUP_METHOD_GET,
1140                                       NULL);
1141                 }
1142                 soup_message_set_request (msg, NULL,
1143                                           SOUP_MEMORY_STATIC, NULL, 0);
1144                 soup_message_headers_set_encoding (msg->request_headers,
1145                                                    SOUP_ENCODING_NONE);
1146         } else if (msg->status_code == SOUP_STATUS_MOVED_PERMANENTLY ||
1147                    msg->status_code == SOUP_STATUS_TEMPORARY_REDIRECT ||
1148                    msg->status_code == SOUP_STATUS_FOUND) {
1149                 /* Don't redirect non-safe methods */
1150                 if (!SOUP_METHOD_IS_SAFE (msg->method))
1151                         return;
1152         } else {
1153                 /* Three possibilities:
1154                  *
1155                  *   1) This was a non-3xx response that happened to
1156                  *      have a "Location" header
1157                  *   2) It's a non-redirecty 3xx response (300, 304,
1158                  *      305, 306)
1159                  *   3) It's some newly-defined 3xx response (308+)
1160                  *
1161                  * We ignore all of these cases. In the first two,
1162                  * redirecting would be explicitly wrong, and in the
1163                  * last case, we have no clue if the 3xx response is
1164                  * supposed to be redirecty or non-redirecty. Plus,
1165                  * 2616 says unrecognized status codes should be
1166                  * treated as the equivalent to the x00 code, and we
1167                  * don't redirect on 300, so therefore we shouldn't
1168                  * redirect on 308+ either.
1169                  */
1170                 return;
1171         }
1172
1173         /* Location is supposed to be an absolute URI, but some sites
1174          * are lame, so we use soup_uri_new_with_base().
1175          */
1176         new_uri = soup_uri_new_with_base (soup_message_get_uri (msg), new_loc);
1177         if (!new_uri || !new_uri->host) {
1178                 if (new_uri)
1179                         soup_uri_free (new_uri);
1180                 soup_message_set_status_full (msg,
1181                                               SOUP_STATUS_MALFORMED,
1182                                               "Invalid Redirect URL");
1183                 return;
1184         }
1185
1186         soup_message_set_uri (msg, new_uri);
1187         soup_uri_free (new_uri);
1188
1189         soup_session_requeue_message (session, msg);
1190 }
1191
1192 void
1193 soup_session_send_queue_item (SoupSession *session,
1194                               SoupMessageQueueItem *item,
1195                               SoupMessageCompletionFn completion_cb)
1196 {
1197         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1198         const char *conn_header;
1199
1200         if (priv->user_agent) {
1201                 soup_message_headers_replace (item->msg->request_headers,
1202                                               "User-Agent", priv->user_agent);
1203         }
1204
1205         if (priv->accept_language &&
1206             !soup_message_headers_get_list (item->msg->request_headers,
1207                                             "Accept-Language")) {
1208                 soup_message_headers_append (item->msg->request_headers,
1209                                              "Accept-Language",
1210                                              priv->accept_language);
1211         }
1212
1213         /* Force keep alive connections for HTTP 1.0. Performance will
1214          * improve when issuing multiple requests to the same host in
1215          * a short period of time, as we wouldn't need to establish
1216          * new connections. Keep alive is implicit for HTTP 1.1.
1217          */
1218         conn_header = soup_message_headers_get_list (item->msg->request_headers, "Connection");
1219         if (!conn_header ||
1220             (!soup_header_contains (conn_header, "Keep-Alive") &&
1221              !soup_header_contains (conn_header, "close")))
1222                 soup_message_headers_append (item->msg->request_headers,
1223                                              "Connection", "Keep-Alive");
1224
1225         g_signal_emit (session, signals[REQUEST_STARTED], 0,
1226                        item->msg, soup_connection_get_socket (item->conn));
1227         soup_connection_send_request (item->conn, item, completion_cb, item);
1228 }
1229
1230 gboolean
1231 soup_session_cleanup_connections (SoupSession *session,
1232                                   gboolean     prune_idle)
1233 {
1234         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1235         GSList *conns = NULL, *c;
1236         GHashTableIter iter;
1237         gpointer conn, host;
1238         SoupConnectionState state;
1239
1240         g_mutex_lock (priv->host_lock);
1241         g_hash_table_iter_init (&iter, priv->conns);
1242         while (g_hash_table_iter_next (&iter, &conn, &host)) {
1243                 state = soup_connection_get_state (conn);
1244                 if (state == SOUP_CONNECTION_REMOTE_DISCONNECTED ||
1245                     (prune_idle && state == SOUP_CONNECTION_IDLE))
1246                         conns = g_slist_prepend (conns, g_object_ref (conn));
1247         }
1248         g_mutex_unlock (priv->host_lock);
1249
1250         if (!conns)
1251                 return FALSE;
1252
1253         for (c = conns; c; c = c->next) {
1254                 conn = c->data;
1255                 soup_connection_disconnect (conn);
1256                 g_object_unref (conn);
1257         }
1258         g_slist_free (conns);
1259
1260         return TRUE;
1261 }
1262
1263 static void
1264 connection_disconnected (SoupConnection *conn, gpointer user_data)
1265 {
1266         SoupSession *session = user_data;
1267         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1268         SoupSessionHost *host;
1269
1270         g_mutex_lock (priv->host_lock);
1271
1272         host = g_hash_table_lookup (priv->conns, conn);
1273         if (host) {
1274                 g_hash_table_remove (priv->conns, conn);
1275                 host->connections = g_slist_remove (host->connections, conn);
1276                 host->num_conns--;
1277
1278                 if (soup_connection_get_ssl_fallback (conn))
1279                         host->ssl_fallback = TRUE;
1280         }
1281
1282         g_signal_handlers_disconnect_by_func (conn, connection_disconnected, session);
1283         priv->num_conns--;
1284
1285         g_mutex_unlock (priv->host_lock);
1286         g_object_unref (conn);
1287 }
1288
1289 SoupMessageQueueItem *
1290 soup_session_make_connect_message (SoupSession    *session,
1291                                    SoupConnection *conn)
1292 {
1293         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1294         SoupAddress *server_addr = soup_connection_get_tunnel_addr (conn);
1295         SoupURI *uri;
1296         SoupMessage *msg;
1297         SoupMessageQueueItem *item;
1298
1299         uri = soup_uri_new (NULL);
1300         soup_uri_set_scheme (uri, SOUP_URI_SCHEME_HTTPS);
1301         soup_uri_set_host (uri, soup_address_get_name (server_addr));
1302         soup_uri_set_port (uri, soup_address_get_port (server_addr));
1303         soup_uri_set_path (uri, "");
1304         msg = soup_message_new_from_uri (SOUP_METHOD_CONNECT, uri);
1305         soup_message_set_flags (msg, SOUP_MESSAGE_NO_REDIRECT);
1306         soup_uri_free (uri);
1307
1308         /* Call the base implementation of soup_session_queue_message
1309          * directly, to add msg to the SoupMessageQueue and cause all
1310          * the right signals to be emitted.
1311          */
1312         queue_message (session, msg, NULL, NULL);
1313         item = soup_message_queue_lookup (priv->queue, msg);
1314         item->conn = g_object_ref (conn);
1315         g_object_unref (msg);
1316
1317         g_signal_emit (session, signals[TUNNELING], 0, conn);
1318         return item;
1319 }
1320
1321 gboolean
1322 soup_session_get_connection (SoupSession *session,
1323                              SoupMessageQueueItem *item,
1324                              gboolean *try_pruning)
1325 {
1326         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1327         SoupConnection *conn;
1328         SoupSessionHost *host;
1329         SoupAddress *remote_addr, *tunnel_addr;
1330         SoupSSLCredentials *ssl_creds;
1331         GSList *conns;
1332         int num_pending = 0;
1333         SoupURI *uri;
1334
1335         if (item->conn) {
1336                 g_return_val_if_fail (soup_connection_get_state (item->conn) != SOUP_CONNECTION_DISCONNECTED, FALSE);
1337                 return TRUE;
1338         }
1339
1340         g_mutex_lock (priv->host_lock);
1341
1342         host = get_host_for_message (session, item->msg);
1343         for (conns = host->connections; conns; conns = conns->next) {
1344                 if (soup_connection_get_state (conns->data) == SOUP_CONNECTION_IDLE) {
1345                         soup_connection_set_state (conns->data, SOUP_CONNECTION_IN_USE);
1346                         g_mutex_unlock (priv->host_lock);
1347                         item->conn = g_object_ref (conns->data);
1348                         return TRUE;
1349                 } else if (soup_connection_get_state (conns->data) == SOUP_CONNECTION_CONNECTING)
1350                         num_pending++;
1351         }
1352
1353         /* Limit the number of pending connections; num_messages / 2
1354          * is somewhat arbitrary...
1355          */
1356         if (num_pending > host->num_messages / 2) {
1357                 g_mutex_unlock (priv->host_lock);
1358                 return FALSE;
1359         }
1360
1361         if (host->num_conns >= priv->max_conns_per_host) {
1362                 g_mutex_unlock (priv->host_lock);
1363                 return FALSE;
1364         }
1365
1366         if (priv->num_conns >= priv->max_conns) {
1367                 *try_pruning = TRUE;
1368                 g_mutex_unlock (priv->host_lock);
1369                 return FALSE;
1370         }
1371
1372         if (item->proxy_addr) {
1373                 remote_addr = item->proxy_addr;
1374                 tunnel_addr = NULL;
1375         } else {
1376                 remote_addr = host->addr;
1377                 tunnel_addr = NULL;
1378         }
1379
1380         uri = soup_message_get_uri (item->msg);
1381         if (uri->scheme == SOUP_URI_SCHEME_HTTPS) {
1382                 if (!priv->ssl_creds)
1383                         priv->ssl_creds = soup_ssl_get_client_credentials (priv->ssl_ca_file);
1384                 ssl_creds = priv->ssl_creds;
1385
1386                 if (item->proxy_addr)
1387                         tunnel_addr = host->addr;
1388         } else
1389                 ssl_creds = NULL;
1390
1391         conn = soup_connection_new (
1392                 SOUP_CONNECTION_REMOTE_ADDRESS, remote_addr,
1393                 SOUP_CONNECTION_TUNNEL_ADDRESS, tunnel_addr,
1394                 SOUP_CONNECTION_PROXY_URI, item->proxy_uri,
1395                 SOUP_CONNECTION_SSL_CREDENTIALS, ssl_creds,
1396                 SOUP_CONNECTION_SSL_STRICT, priv->ssl_strict,
1397                 SOUP_CONNECTION_ASYNC_CONTEXT, priv->async_context,
1398                 SOUP_CONNECTION_TIMEOUT, priv->io_timeout,
1399                 SOUP_CONNECTION_IDLE_TIMEOUT, priv->idle_timeout,
1400                 SOUP_CONNECTION_SSL_FALLBACK, host->ssl_fallback,
1401                 NULL);
1402         g_signal_connect (conn, "disconnected",
1403                           G_CALLBACK (connection_disconnected),
1404                           session);
1405
1406         g_signal_emit (session, signals[CONNECTION_CREATED], 0, conn);
1407
1408         g_hash_table_insert (priv->conns, conn, host);
1409
1410         priv->num_conns++;
1411         host->num_conns++;
1412         host->connections = g_slist_prepend (host->connections, conn);
1413
1414         g_mutex_unlock (priv->host_lock);
1415         item->conn = g_object_ref (conn);
1416         return TRUE;
1417 }
1418
1419 SoupMessageQueue *
1420 soup_session_get_queue (SoupSession *session)
1421 {
1422         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1423
1424         return priv->queue;
1425 }
1426
1427 void
1428 soup_session_unqueue_item (SoupSession          *session,
1429                            SoupMessageQueueItem *item)
1430 {
1431         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1432         SoupSessionHost *host;
1433
1434         if (item->conn) {
1435                 g_object_unref (item->conn);
1436                 item->conn = NULL;
1437         }
1438
1439         if (item->state != SOUP_MESSAGE_FINISHED) {
1440                 g_warning ("finished an item with state %d", item->state);
1441                 return;
1442         }
1443
1444         soup_message_queue_remove (priv->queue, item);
1445
1446         g_mutex_lock (priv->host_lock);
1447         host = get_host_for_message (session, item->msg);
1448         host->num_messages--;
1449         g_mutex_unlock (priv->host_lock);
1450
1451         /* g_signal_handlers_disconnect_by_func doesn't work if you
1452          * have a metamarshal, meaning it doesn't work with
1453          * soup_message_add_header_handler()
1454          */
1455         g_signal_handlers_disconnect_matched (item->msg, G_SIGNAL_MATCH_DATA,
1456                                               0, 0, NULL, NULL, item);
1457         g_signal_emit (session, signals[REQUEST_UNQUEUED], 0, item->msg);
1458         soup_message_queue_item_unref (item);
1459 }
1460
1461 void
1462 soup_session_set_item_status (SoupSession          *session,
1463                               SoupMessageQueueItem *item,
1464                               guint                 status_code)
1465 {
1466         SoupURI *uri;
1467         char *msg;
1468
1469         switch (status_code) {
1470         case SOUP_STATUS_CANT_RESOLVE:
1471         case SOUP_STATUS_CANT_CONNECT:
1472                 uri = soup_message_get_uri (item->msg);
1473                 msg = g_strdup_printf ("%s (%s)",
1474                                        soup_status_get_phrase (status_code),
1475                                        uri->host);
1476                 soup_message_set_status_full (item->msg, status_code, msg);
1477                 g_free (msg);
1478                 break;
1479
1480         case SOUP_STATUS_CANT_RESOLVE_PROXY:
1481         case SOUP_STATUS_CANT_CONNECT_PROXY:
1482                 if (item->proxy_uri && item->proxy_uri->host) {
1483                         msg = g_strdup_printf ("%s (%s)",
1484                                                soup_status_get_phrase (status_code),
1485                                                item->proxy_uri->host);
1486                         soup_message_set_status_full (item->msg, status_code, msg);
1487                         g_free (msg);
1488                         break;
1489                 }
1490                 soup_message_set_status (item->msg, status_code);
1491                 break;
1492
1493         case SOUP_STATUS_SSL_FAILED:
1494                 if (!g_tls_backend_supports_tls (g_tls_backend_get_default ())) {
1495                         soup_message_set_status_full (item->msg, status_code,
1496                                                       "TLS/SSL support not available; install glib-networking");
1497                 } else
1498                         soup_message_set_status (item->msg, status_code);
1499                 break;
1500
1501         default:
1502                 soup_message_set_status (item->msg, status_code);
1503                 break;
1504         }
1505 }
1506
1507 static void
1508 queue_message (SoupSession *session, SoupMessage *msg,
1509                SoupSessionCallback callback, gpointer user_data)
1510 {
1511         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1512         SoupMessageQueueItem *item;
1513         SoupSessionHost *host;
1514
1515         item = soup_message_queue_append (priv->queue, msg, callback, user_data);
1516
1517         g_mutex_lock (priv->host_lock);
1518         host = get_host_for_message (session, item->msg);
1519         host->num_messages++;
1520         g_mutex_unlock (priv->host_lock);
1521
1522         if (!(soup_message_get_flags (msg) & SOUP_MESSAGE_NO_REDIRECT)) {
1523                 soup_message_add_header_handler (
1524                         msg, "got_body", "Location",
1525                         G_CALLBACK (redirect_handler), item);
1526         }
1527
1528         g_signal_emit (session, signals[REQUEST_QUEUED], 0, msg);
1529 }
1530
1531 /**
1532  * SoupSessionCallback:
1533  * @session: the session
1534  * @msg: the message that has finished
1535  * @user_data: the data passed to soup_session_queue_message
1536  *
1537  * Prototype for the callback passed to soup_session_queue_message(),
1538  * qv.
1539  **/
1540
1541 /**
1542  * soup_session_queue_message:
1543  * @session: a #SoupSession
1544  * @msg: (transfer full): the message to queue
1545  * @callback: (allow-none) (scope async): a #SoupSessionCallback which will
1546  * be called after the message completes or when an unrecoverable error occurs.
1547  * @user_data: (allow-none): a pointer passed to @callback.
1548  *
1549  * Queues the message @msg for sending. All messages are processed
1550  * while the glib main loop runs. If @msg has been processed before,
1551  * any resources related to the time it was last sent are freed.
1552  *
1553  * Upon message completion, the callback specified in @callback will
1554  * be invoked (in the thread associated with @session's async
1555  * context). If after returning from this callback the message has not
1556  * been requeued, @msg will be unreffed.
1557  */
1558 void
1559 soup_session_queue_message (SoupSession *session, SoupMessage *msg,
1560                             SoupSessionCallback callback, gpointer user_data)
1561 {
1562         g_return_if_fail (SOUP_IS_SESSION (session));
1563         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1564
1565         SOUP_SESSION_GET_CLASS (session)->queue_message (session, msg,
1566                                                          callback, user_data);
1567 }
1568
1569 static void
1570 requeue_message (SoupSession *session, SoupMessage *msg)
1571 {
1572         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1573         SoupMessageQueueItem *item;
1574
1575         item = soup_message_queue_lookup (priv->queue, msg);
1576         g_return_if_fail (item != NULL);
1577         item->state = SOUP_MESSAGE_RESTARTING;
1578         soup_message_queue_item_unref (item);
1579 }
1580
1581 /**
1582  * soup_session_requeue_message:
1583  * @session: a #SoupSession
1584  * @msg: the message to requeue
1585  *
1586  * This causes @msg to be placed back on the queue to be attempted
1587  * again.
1588  **/
1589 void
1590 soup_session_requeue_message (SoupSession *session, SoupMessage *msg)
1591 {
1592         g_return_if_fail (SOUP_IS_SESSION (session));
1593         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1594
1595         SOUP_SESSION_GET_CLASS (session)->requeue_message (session, msg);
1596 }
1597
1598
1599 /**
1600  * soup_session_send_message:
1601  * @session: a #SoupSession
1602  * @msg: the message to send
1603  *
1604  * Synchronously send @msg. This call will not return until the
1605  * transfer is finished successfully or there is an unrecoverable
1606  * error.
1607  *
1608  * @msg is not freed upon return.
1609  *
1610  * Return value: the HTTP status code of the response
1611  */
1612 guint
1613 soup_session_send_message (SoupSession *session, SoupMessage *msg)
1614 {
1615         g_return_val_if_fail (SOUP_IS_SESSION (session), SOUP_STATUS_MALFORMED);
1616         g_return_val_if_fail (SOUP_IS_MESSAGE (msg), SOUP_STATUS_MALFORMED);
1617
1618         return SOUP_SESSION_GET_CLASS (session)->send_message (session, msg);
1619 }
1620
1621
1622 /**
1623  * soup_session_pause_message:
1624  * @session: a #SoupSession
1625  * @msg: a #SoupMessage currently running on @session
1626  *
1627  * Pauses HTTP I/O on @msg. Call soup_session_unpause_message() to
1628  * resume I/O.
1629  **/
1630 void
1631 soup_session_pause_message (SoupSession *session,
1632                             SoupMessage *msg)
1633 {
1634         g_return_if_fail (SOUP_IS_SESSION (session));
1635         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1636
1637 #if ENABLE(TIZEN_FIX_PAUSE_MESSAGE)
1638         if(soup_message_io_in_progress (msg))
1639                 soup_message_io_pause (msg);
1640 #else
1641         soup_message_io_pause (msg);
1642 #endif
1643 }
1644
1645 /**
1646  * soup_session_unpause_message:
1647  * @session: a #SoupSession
1648  * @msg: a #SoupMessage currently running on @session
1649  *
1650  * Resumes HTTP I/O on @msg. Use this to resume after calling
1651  * soup_session_pause_message().
1652  *
1653  * If @msg is being sent via blocking I/O, this will resume reading or
1654  * writing immediately. If @msg is using non-blocking I/O, then
1655  * reading or writing won't resume until you return to the main loop.
1656  **/
1657 void
1658 soup_session_unpause_message (SoupSession *session,
1659                               SoupMessage *msg)
1660 {
1661         g_return_if_fail (SOUP_IS_SESSION (session));
1662         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1663
1664 #if ENABLE(TIZEN_FIX_PAUSE_MESSAGE)
1665         if(soup_message_io_in_progress (msg))
1666                 soup_message_io_unpause (msg);
1667 #else
1668         soup_message_io_unpause (msg);
1669 #endif
1670 }
1671
1672
1673 static void
1674 cancel_message (SoupSession *session, SoupMessage *msg, guint status_code)
1675 {
1676         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1677         SoupMessageQueueItem *item;
1678
1679         item = soup_message_queue_lookup (priv->queue, msg);
1680         g_return_if_fail (item != NULL);
1681
1682         soup_message_set_status (msg, status_code);
1683         g_cancellable_cancel (item->cancellable);
1684
1685         soup_message_queue_item_unref (item);
1686 }
1687
1688 /**
1689  * soup_session_cancel_message:
1690  * @session: a #SoupSession
1691  * @msg: the message to cancel
1692  * @status_code: status code to set on @msg (generally
1693  * %SOUP_STATUS_CANCELLED)
1694  *
1695  * Causes @session to immediately finish processing @msg (regardless
1696  * of its current state) with a final status_code of @status_code. You
1697  * may call this at any time after handing @msg off to @session; if
1698  * @session has started sending the request but has not yet received
1699  * the complete response, then it will close the request's connection.
1700  * Note that with non-idempotent requests (eg, %POST, %PUT, %DELETE)
1701  * it is possible that you might cancel the request after the server
1702  * acts on it, but before it returns a response, leaving the remote
1703  * resource in an unknown state.
1704  *
1705  * If the message is cancelled while its response body is being read,
1706  * then the response body in @msg will be left partially-filled-in.
1707  * The response headers, on the other hand, will always be either
1708  * empty or complete.
1709  *
1710  * For messages queued with soup_session_queue_message() (and
1711  * cancelled from the same thread), the callback will be invoked
1712  * before soup_session_cancel_message() returns.
1713  **/
1714 void
1715 soup_session_cancel_message (SoupSession *session, SoupMessage *msg,
1716                              guint status_code)
1717 {
1718         SoupSessionPrivate *priv;
1719         SoupMessageQueueItem *item;
1720
1721         g_return_if_fail (SOUP_IS_SESSION (session));
1722         g_return_if_fail (SOUP_IS_MESSAGE (msg));
1723
1724         priv = SOUP_SESSION_GET_PRIVATE (session);
1725         item = soup_message_queue_lookup (priv->queue, msg);
1726         /* If the message is already ending, don't do anything */
1727         if (!item)
1728                 return;
1729         if (item->state == SOUP_MESSAGE_FINISHED) {
1730                 soup_message_queue_item_unref (item);
1731                 return;
1732         }
1733
1734         SOUP_SESSION_GET_CLASS (session)->cancel_message (session, msg, status_code);
1735         soup_message_queue_item_unref (item);
1736 }
1737
1738 static void
1739 gather_conns (gpointer key, gpointer host, gpointer data)
1740 {
1741         SoupConnection *conn = key;
1742         GSList **conns = data;
1743
1744         *conns = g_slist_prepend (*conns, g_object_ref (conn));
1745 }
1746
1747 static void
1748 flush_queue (SoupSession *session)
1749 {
1750         SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1751         SoupMessageQueueItem *item;
1752
1753         for (item = soup_message_queue_first (priv->queue);
1754              item;
1755              item = soup_message_queue_next (priv->queue, item)) {
1756                 soup_session_cancel_message (session, item->msg,
1757                                              SOUP_STATUS_CANCELLED);
1758         }
1759 }
1760
1761 /**
1762  * soup_session_abort:
1763  * @session: the session
1764  *
1765  * Cancels all pending requests in @session.
1766  **/
1767 void
1768 soup_session_abort (SoupSession *session)
1769 {
1770         SoupSessionPrivate *priv;
1771         GSList *conns, *c;
1772
1773         g_return_if_fail (SOUP_IS_SESSION (session));
1774         priv = SOUP_SESSION_GET_PRIVATE (session);
1775
1776         SOUP_SESSION_GET_CLASS (session)->flush_queue (session);
1777
1778         /* Close all connections */
1779         g_mutex_lock (priv->host_lock);
1780         conns = NULL;
1781         g_hash_table_foreach (priv->conns, gather_conns, &conns);
1782
1783         g_mutex_unlock (priv->host_lock);
1784         for (c = conns; c; c = c->next) {
1785                 soup_connection_disconnect (c->data);
1786                 g_object_unref (c->data);
1787         }
1788
1789         g_slist_free (conns);
1790 }
1791
1792 /**
1793 * soup_session_prepare_for_uri:
1794 * @session: a #SoupSession
1795 * @uri: a #SoupURI which may be required
1796 *
1797 * Tells @session that @uri may be requested shortly, and so the
1798 * session can try to prepare (resolving the domain name, obtaining
1799 * proxy address, etc.) in order to work more quickly once the URI is
1800 * actually requested.
1801 *
1802 * This method acts asynchronously, in @session's %async_context.
1803 * If you are using #SoupSessionSync and do not have a main loop running,
1804 * then you can't use this method.
1805 *
1806 * Since: 2.30
1807 **/
1808 void
1809 soup_session_prepare_for_uri (SoupSession *session, SoupURI *uri)
1810 {
1811         SoupSessionPrivate *priv;
1812         SoupSessionHost *host;
1813         SoupAddress *addr;
1814
1815         g_return_if_fail (SOUP_IS_SESSION (session));
1816         g_return_if_fail (uri != NULL);
1817
1818         if (!uri->host)
1819                 return;
1820
1821         priv = SOUP_SESSION_GET_PRIVATE (session);
1822
1823         g_mutex_lock (priv->host_lock);
1824         host = get_host_for_uri (session, uri);
1825         addr = g_object_ref (host->addr);
1826         g_mutex_unlock (priv->host_lock);
1827
1828         soup_address_resolve_async (addr, priv->async_context,
1829                                     NULL, NULL, NULL);
1830         g_object_unref (addr);
1831 }
1832
1833 /**
1834  * soup_session_add_feature:
1835  * @session: a #SoupSession
1836  * @feature: an object that implements #SoupSessionFeature
1837  *
1838  * Adds @feature's functionality to @session. You can also add a
1839  * feature to the session at construct time by using the
1840  * %SOUP_SESSION_ADD_FEATURE property.
1841  *
1842  * Since: 2.24
1843  **/
1844 void
1845 soup_session_add_feature (SoupSession *session, SoupSessionFeature *feature)
1846 {
1847         SoupSessionPrivate *priv;
1848
1849         g_return_if_fail (SOUP_IS_SESSION (session));
1850         g_return_if_fail (SOUP_IS_SESSION_FEATURE (feature));
1851
1852         priv = SOUP_SESSION_GET_PRIVATE (session);
1853         priv->features = g_slist_prepend (priv->features, g_object_ref (feature));
1854         g_hash_table_remove_all (priv->features_cache);
1855         soup_session_feature_attach (feature, session);
1856 }
1857
1858 /**
1859  * soup_session_add_feature_by_type:
1860  * @session: a #SoupSession
1861  * @feature_type: a #GType
1862  *
1863  * If @feature_type is the type of a class that implements
1864  * #SoupSessionFeature, this creates a new feature of that type and
1865  * adds it to @session as with soup_session_add_feature(). You can use
1866  * this when you don't need to customize the new feature in any way.
1867  *
1868  * If @feature_type is not a #SoupSessionFeature type, this gives
1869  * each existing feature on @session the chance to accept @feature_type
1870  * as a "subfeature". This can be used to add new #SoupAuth types,
1871  * for instance.
1872  *
1873  * You can also add a feature to the session at construct time by
1874  * using the %SOUP_SESSION_ADD_FEATURE_BY_TYPE property.
1875  *
1876  * Since: 2.24
1877  **/
1878 void
1879 soup_session_add_feature_by_type (SoupSession *session, GType feature_type)
1880 {
1881         g_return_if_fail (SOUP_IS_SESSION (session));
1882
1883         if (g_type_is_a (feature_type, SOUP_TYPE_SESSION_FEATURE)) {
1884                 SoupSessionFeature *feature;
1885
1886                 feature = g_object_new (feature_type, NULL);
1887                 soup_session_add_feature (session, feature);
1888                 g_object_unref (feature);
1889         } else {
1890                 SoupSessionPrivate *priv = SOUP_SESSION_GET_PRIVATE (session);
1891                 GSList *f;
1892
1893                 for (f = priv->features; f; f = f->next) {
1894                         if (soup_session_feature_add_feature (f->data, feature_type))
1895                                 return;
1896                 }
1897                 g_warning ("No feature manager for feature of type '%s'", g_type_name (feature_type));
1898         }
1899 }
1900
1901 /**
1902  * soup_session_remove_feature:
1903  * @session: a #SoupSession
1904  * @feature: a feature that has previously been added to @session
1905  *
1906  * Removes @feature's functionality from @session.
1907  *
1908  * Since: 2.24
1909  **/
1910 void
1911 soup_session_remove_feature (SoupSession *session, SoupSessionFeature *feature)
1912 {
1913         SoupSessionPrivate *priv;
1914
1915         g_return_if_fail (SOUP_IS_SESSION (session));
1916
1917         priv = SOUP_SESSION_GET_PRIVATE (session);
1918         if (g_slist_find (priv->features, feature)) {
1919                 priv->features = g_slist_remove (priv->features, feature);
1920                 g_hash_table_remove_all (priv->features_cache);
1921                 soup_session_feature_detach (feature, session);
1922                 g_object_unref (feature);
1923         }
1924 }
1925
1926 /**
1927  * soup_session_remove_feature_by_type:
1928  * @session: a #SoupSession
1929  * @feature_type: a #GType
1930  *
1931  * Removes all features of type @feature_type (or any subclass of
1932  * @feature_type) from @session. You can also remove standard features
1933  * from the session at construct time by using the
1934  * %SOUP_SESSION_REMOVE_FEATURE_BY_TYPE property.
1935  *
1936  * Since: 2.24
1937  **/
1938 void
1939 soup_session_remove_feature_by_type (SoupSession *session, GType feature_type)
1940 {
1941         SoupSessionPrivate *priv;
1942         GSList *f;
1943
1944         g_return_if_fail (SOUP_IS_SESSION (session));
1945
1946         priv = SOUP_SESSION_GET_PRIVATE (session);
1947
1948         if (g_type_is_a (feature_type, SOUP_TYPE_SESSION_FEATURE)) {
1949         restart:
1950                 for (f = priv->features; f; f = f->next) {
1951                         if (G_TYPE_CHECK_INSTANCE_TYPE (f->data, feature_type)) {
1952                                 soup_session_remove_feature (session, f->data);
1953                                 goto restart;
1954                         }
1955                 }
1956         } else {
1957                 for (f = priv->features; f; f = f->next) {
1958                         if (soup_session_feature_remove_feature (f->data, feature_type))
1959                                 return;
1960                 }
1961                 g_warning ("No feature manager for feature of type '%s'", g_type_name (feature_type));
1962         }
1963 }
1964
1965 /**
1966  * soup_session_get_features:
1967  * @session: a #SoupSession
1968  * @feature_type: the #GType of the class of features to get
1969  *
1970  * Generates a list of @session's features of type @feature_type. (If
1971  * you want to see all features, you can pass %G_TYPE_SESSION_FEATURE
1972  * for @feature_type.)
1973  *
1974  * Return value: (transfer container) (element-type Soup.SessionFeature):
1975  * a list of features. You must free the list, but not its contents
1976  *
1977  * Since: 2.26
1978  **/
1979 GSList *
1980 soup_session_get_features (SoupSession *session, GType feature_type)
1981 {
1982         SoupSessionPrivate *priv;
1983         GSList *f, *ret;
1984
1985         g_return_val_if_fail (SOUP_IS_SESSION (session), NULL);
1986
1987         priv = SOUP_SESSION_GET_PRIVATE (session);
1988         for (f = priv->features, ret = NULL; f; f = f->next) {
1989                 if (G_TYPE_CHECK_INSTANCE_TYPE (f->data, feature_type))
1990                         ret = g_slist_prepend (ret, f->data);
1991         }
1992         return g_slist_reverse (ret);
1993 }
1994
1995 /**
1996  * soup_session_get_feature:
1997  * @session: a #SoupSession
1998  * @feature_type: the #GType of the feature to get
1999  *
2000  * Gets the first feature in @session of type @feature_type. For
2001  * features where there may be more than one feature of a given type,
2002  * use soup_session_get_features().
2003  *
2004  * Return value: (transfer none): a #SoupSessionFeature, or %NULL. The
2005  * feature is owned by @session.
2006  *
2007  * Since: 2.26
2008  **/
2009 SoupSessionFeature *
2010 soup_session_get_feature (SoupSession *session, GType feature_type)
2011 {
2012         SoupSessionPrivate *priv;
2013         SoupSessionFeature *feature;
2014         GSList *f;
2015
2016         g_return_val_if_fail (SOUP_IS_SESSION (session), NULL);
2017
2018         priv = SOUP_SESSION_GET_PRIVATE (session);
2019
2020         feature = g_hash_table_lookup (priv->features_cache,
2021                                        GSIZE_TO_POINTER (feature_type));
2022         if (feature)
2023                 return feature;
2024
2025         for (f = priv->features; f; f = f->next) {
2026                 feature = f->data;
2027                 if (G_TYPE_CHECK_INSTANCE_TYPE (feature, feature_type)) {
2028                         g_hash_table_insert (priv->features_cache,
2029                                              GSIZE_TO_POINTER (feature_type),
2030                                              feature);
2031                         return feature;
2032                 }
2033         }
2034         return NULL;
2035 }
2036
2037 /**
2038  * soup_session_get_feature_for_message:
2039  * @session: a #SoupSession
2040  * @feature_type: the #GType of the feature to get
2041  * @msg: a #SoupMessage
2042  *
2043  * Gets the first feature in @session of type @feature_type, provided
2044  * that it is not disabled for @msg. As with
2045  * soup_session_get_feature(), this should only be used for features
2046  * where @feature_type is only expected to match a single feature. In
2047  * particular, if there are two matching features, and the first is
2048  * disabled on @msg, and the second is not, then this will return
2049  * %NULL, not the second feature.
2050  *
2051  * Return value: (transfer none): a #SoupSessionFeature, or %NULL. The
2052  * feature is owned by @session.
2053  *
2054  * Since: 2.28
2055  **/
2056 SoupSessionFeature *
2057 soup_session_get_feature_for_message (SoupSession *session, GType feature_type,
2058                                       SoupMessage *msg)
2059 {
2060         SoupSessionFeature *feature;
2061
2062         feature = soup_session_get_feature (session, feature_type);
2063         if (feature && soup_message_disables_feature (msg, feature))
2064                 return NULL;
2065         return feature;
2066 }