path: root/libsoup/soup-message.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * soup-message.c: HTTP request/response
 *
 * Copyright (C) 2000-2003, Ximian, Inc.
 */

#include <stdlib.h>
#include <string.h>

#include "soup-address.h"
#include "soup-auth.h"
#include "soup-enum-types.h"
#include "soup-marshal.h"
#include "soup-message.h"
#include "soup-message-private.h"
#include "soup-misc.h"
#include "soup-uri.h"

/**
 * SECTION:soup-message
 * @short_description: An HTTP request and response.
 * @see_also: #SoupMessageHeaders, #SoupMessageBody
 *
 * A #SoupMessage represents an HTTP message that is being sent or
 * received.
 *
 * For client-side usage, you would create a #SoupMessage with
 * soup_message_new() or soup_message_new_from_uri(), set up its
 * fields appropriate, and send it via a #SoupSession.
 *
 * For server-side usage, #SoupServer will create #SoupMessage<!--
 * -->s automatically for incoming requests, which your application
 * will receive via handlers.
 *
 * Note that libsoup's terminology here does not quite match the HTTP
 * specification: in RFC 2616, an "HTTP-message" is
 * <emphasis>either</emphasis> a Request, <emphasis>or</emphasis> a
 * Response. In libsoup, a #SoupMessage combines both the request and
 * the response.
 **/

/**
 * SoupMessage:
 * @method: the HTTP method
 * @status_code: the HTTP status code
 * @reason_phrase: the status phrase associated with @status_code
 * @request_body: the request body
 * @request_headers: the request headers
 * @response_body: the response body
 * @response_headers: the response headers
 *
 * Represents an HTTP message being sent or received.
 *
 * @status_code will normally be a #SoupKnownStatusCode, eg,
 * %SOUP_STATUS_OK, though of course it might actually be an unknown
 * status code. @reason_phrase is the actual text returned from the
 * server, which may or may not correspond to the "standard"
 * description of @status_code. At any rate, it is almost certainly
 * not localized, and not very descriptive even if it is in the user's
 * language; you should not use @reason_phrase in user-visible
 * messages. Rather, you should look at @status_code, and determine an
 * end-user-appropriate message based on that and on what you were
 * trying to do.
 *
 * As described in the #SoupMessageBody documentation, the
 * @request_body and @response_body %data fields will not necessarily
 * be filled in at all times. When they are filled in, they will be
 * terminated with a '\0' byte (which is not included in the %length),
 * so you can use them as ordinary C strings (assuming that you know
 * that the body doesn't have any other '\0' bytes).
 *
 * For a client-side #SoupMessage, @request_body's %data is usually
 * filled in right before libsoup writes the request to the network,
 * but you should not count on this; use soup_message_body_flatten()
 * if you want to ensure that %data is filled in. @response_body's
 * %data will be filled in before #SoupMessage::finished is emitted.
 *
 * For a server-side #SoupMessage, @request_body's %data will be
 * filled in before #SoupMessage::got_body is emitted.
 *
 * To prevent the %data field from being filled in at all (eg, if you
 * are handling the data from a #SoupMessage::got_chunk, and so don't
 * need to see it all at the end), call
 * soup_message_body_set_accumulate() on @response_body or
 * @request_body as appropriate, passing %FALSE.
 **/

G_DEFINE_TYPE (SoupMessage, soup_message, G_TYPE_OBJECT)

enum {
	WROTE_INFORMATIONAL,
	WROTE_HEADERS,
	WROTE_CHUNK,
	WROTE_BODY_DATA,
	WROTE_BODY,

	GOT_INFORMATIONAL,
	GOT_HEADERS,
	GOT_CHUNK,
	GOT_BODY,
	CONTENT_SNIFFED,

	RESTARTED,
	FINISHED,

	LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

enum {
	PROP_0,

	PROP_METHOD,
	PROP_URI,
	PROP_HTTP_VERSION,
	PROP_FLAGS,
	PROP_SERVER_SIDE,
	PROP_STATUS_CODE,
	PROP_REASON_PHRASE,

	LAST_PROP
};

static void got_body (SoupMessage *req);
static void restarted (SoupMessage *req);
static void finished (SoupMessage *req);

static void set_property (GObject *object, guint prop_id,
			  const GValue *value, GParamSpec *pspec);
static void get_property (GObject *object, guint prop_id,
			  GValue *value, GParamSpec *pspec);

static void
soup_message_init (SoupMessage *msg)
{
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	priv->io_status = SOUP_MESSAGE_IO_STATUS_IDLE;
	priv->http_version = priv->orig_http_version = SOUP_HTTP_1_1;

	msg->request_body = soup_message_body_new ();
	msg->request_headers = soup_message_headers_new (SOUP_MESSAGE_HEADERS_REQUEST);
	msg->response_body = soup_message_body_new ();
	msg->response_headers = soup_message_headers_new (SOUP_MESSAGE_HEADERS_RESPONSE);
}

static void
finalize (GObject *object)
{
	SoupMessage *msg = SOUP_MESSAGE (object);
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	soup_message_io_cleanup (msg);
	if (priv->chunk_allocator_dnotify)
		priv->chunk_allocator_dnotify (priv->chunk_allocator_data);

	if (priv->uri)
		soup_uri_free (priv->uri);
	if (priv->addr)
		g_object_unref (priv->addr);

	if (priv->auth)
		g_object_unref (priv->auth);
	if (priv->proxy_auth)
		g_object_unref (priv->proxy_auth);

	soup_message_body_free (msg->request_body);
	soup_message_headers_free (msg->request_headers);
	soup_message_body_free (msg->response_body);
	soup_message_headers_free (msg->response_headers);

	g_free (msg->reason_phrase);

	G_OBJECT_CLASS (soup_message_parent_class)->finalize (object);
}

static void
soup_message_class_init (SoupMessageClass *message_class)
{
	GObjectClass *object_class = G_OBJECT_CLASS (message_class);

	g_type_class_add_private (message_class, sizeof (SoupMessagePrivate));

	/* virtual method definition */
	message_class->got_body     = got_body;
	message_class->restarted    = restarted;
	message_class->finished     = finished;

	/* virtual method override */
	object_class->finalize = finalize;
	object_class->set_property = set_property;
	object_class->get_property = get_property;

	/* signals */

	/**
	 * SoupMessage::wrote-informational:
	 * @msg: the message
	 *
	 * Emitted immediately after writing a 1xx (Informational)
	 * response for a (server-side) message.
	 **/
	signals[WROTE_INFORMATIONAL] =
		g_signal_new ("wrote_informational",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, wrote_informational),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/**
	 * SoupMessage::wrote-headers:
	 * @msg: the message
	 *
	 * Emitted immediately after writing the headers for a
	 * message. (For a client-side message, this is after writing
	 * the request headers; for a server-side message, it is after
	 * writing the response headers.)
	 **/
	signals[WROTE_HEADERS] =
		g_signal_new ("wrote_headers",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, wrote_headers),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/**
	 * SoupMessage::wrote-chunk:
	 * @msg: the message
	 *
	 * Emitted immediately after writing a body chunk for a message.
	 *
	 * Note that this signal is not parallel to
	 * #SoupMessage::got_chunk; it is emitted only when a complete
	 * chunk (added with soup_message_body_append() or
	 * soup_message_body_append_buffer()) has been written. To get
	 * more useful continuous progress information, use
	 * #SoupMessage::wrote_body_data.
	 **/
	signals[WROTE_CHUNK] =
		g_signal_new ("wrote_chunk",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, wrote_chunk),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/**
	 * SoupMessage::wrote-body-data:
	 * @msg: the message
	 * @chunk: the data written
	 *
	 * Emitted immediately after writing a portion of the message
	 * body to the network.
	 *
	 * Unlike #SoupMessage::wrote_chunk, this is emitted after
	 * every successful write() call, not only after finishing a
	 * complete "chunk".
	 *
	 * Since: 2.4.1
	 **/
	signals[WROTE_BODY_DATA] =
		g_signal_new ("wrote_body_data",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      0, /* FIXME after next ABI break */
			      NULL, NULL,
			      soup_marshal_NONE__BOXED,
			      G_TYPE_NONE, 1,
			      SOUP_TYPE_BUFFER);

	/**
	 * SoupMessage::wrote-body:
	 * @msg: the message
	 *
	 * Emitted immediately after writing the complete body for a
	 * message. (For a client-side message, this means that
	 * libsoup is done writing and is now waiting for the response
	 * from the server. For a server-side message, this means that
	 * libsoup has finished writing the response and is nearly
	 * done with the message.)
	 **/
	signals[WROTE_BODY] =
		g_signal_new ("wrote_body",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, wrote_body),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/**
	 * SoupMessage::got-informational:
	 * @msg: the message
	 *
	 * Emitted after receiving a 1xx (Informational) response for
	 * a (client-side) message. The response_headers will be
	 * filled in with the headers associated with the
	 * informational response; however, those header values will
	 * be erased after this signal is done.
	 *
	 * If you cancel or requeue @msg while processing this signal,
	 * then the current HTTP I/O will be stopped after this signal
	 * emission finished, and @msg's connection will be closed.
	 **/
	signals[GOT_INFORMATIONAL] =
		g_signal_new ("got_informational",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, got_informational),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/**
	 * SoupMessage::got-headers:
	 * @msg: the message
	 *
	 * Emitted after receiving all message headers for a message.
	 * (For a client-side message, this is after receiving the
	 * Status-Line and response headers; for a server-side
	 * message, it is after receiving the Request-Line and request
	 * headers.)
	 *
	 * See also soup_message_add_header_handler() and
	 * soup_message_add_status_code_handler(), which can be used
	 * to connect to a subset of emissions of this signal.
	 *
	 * If you cancel or requeue @msg while processing this signal,
	 * then the current HTTP I/O will be stopped after this signal
	 * emission finished, and @msg's connection will be closed.
	 * (If you need to requeue a message--eg, after handling
	 * authentication or redirection--it is usually better to
	 * requeue it from a #SoupMessage::got_body handler rather
	 * than a #SoupMessage::got_header handler, so that the
	 * existing HTTP connection can be reused.)
	 **/
	signals[GOT_HEADERS] =
		g_signal_new ("got_headers",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, got_headers),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/**
	 * SoupMessage::got-chunk:
	 * @msg: the message
	 * @chunk: the just-read chunk
	 *
	 * Emitted after receiving a chunk of a message body. Note
	 * that "chunk" in this context means any subpiece of the
	 * body, not necessarily the specific HTTP 1.1 chunks sent by
	 * the other side.
	 *
	 * If you cancel or requeue @msg while processing this signal,
	 * then the current HTTP I/O will be stopped after this signal
	 * emission finished, and @msg's connection will be closed.
	 **/
	signals[GOT_CHUNK] =
		g_signal_new ("got_chunk",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, got_chunk),
			      NULL, NULL,
			      soup_marshal_NONE__BOXED,
			      G_TYPE_NONE, 1,
			      /* Use %G_SIGNAL_TYPE_STATIC_SCOPE so that
			       * the %SOUP_MEMORY_TEMPORARY buffers used
			       * by soup-message-io.c when emitting this
			       * signal don't get forcibly copied by
			       * g_signal_emit().
			       */
			      SOUP_TYPE_BUFFER | G_SIGNAL_TYPE_STATIC_SCOPE);

	/**
	 * SoupMessage::got-body:
	 * @msg: the message
	 *
	 * Emitted after receiving the complete message body. (For a
	 * server-side message, this means it has received the request
	 * body. For a client-side message, this means it has received
	 * the response body and is nearly done with the message.)
	 *
	 * See also soup_message_add_header_handler() and
	 * soup_message_add_status_code_handler(), which can be used
	 * to connect to a subset of emissions of this signal.
	 **/
	signals[GOT_BODY] =
		g_signal_new ("got_body",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, got_body),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/**
	 * SoupMessage::content-sniffed:
	 * @msg: the message
	 * @type: the content type that we got from sniffing
	 * @params: a #GHashTable with the parameters
	 *
	 * This signal is emitted after %got-headers, and before the
	 * first %got-chunk. If content sniffing is disabled, or no
	 * content sniffing will be performed, due to the sniffer
	 * deciding to trust the Content-Type sent by the server, this
	 * signal is emitted immediately after %got_headers, and @type
	 * is %NULL.
	 *
	 * If the #SoupContentSniffer feature is enabled, and the
	 * sniffer decided to perform sniffing, the first %got_chunk
	 * emission may be delayed, so that the sniffer has enough
	 * data to correctly sniff the content. It notified the
	 * library user that the content has been sniffed, and allows
	 * it to change the header contents in the message, if
	 * desired.
	 *
	 * After this signal is emitted, the data that was spooled so
	 * that sniffing could be done is delivered on the first
	 * emission of %got_chunk.
	 *
	 * Since: 2.27.3
	 **/
	signals[CONTENT_SNIFFED] =
		g_signal_new ("content_sniffed",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      0,
			      NULL, NULL,
			      soup_marshal_NONE__STRING_BOXED,
			      G_TYPE_NONE, 2,
			      G_TYPE_STRING,
			      G_TYPE_HASH_TABLE);

	/**
	 * SoupMessage::restarted:
	 * @msg: the message
	 *
	 * Emitted when a request that was already sent once is now
	 * being sent again (eg, because the first attempt received a
	 * redirection response, or because we needed to use
	 * authentication).
	 **/
	signals[RESTARTED] =
		g_signal_new ("restarted",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, restarted),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/**
	 * SoupMessage::finished:
	 * @msg: the message
	 *
	 * Emitted when all HTTP processing is finished for a message.
	 * (After #SoupMessage::got_body for client-side messages, or
	 * after #SoupMessage::wrote_body for server-side messages.)
	 **/
	signals[FINISHED] =
		g_signal_new ("finished",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (SoupMessageClass, finished),
			      NULL, NULL,
			      soup_marshal_NONE__NONE,
			      G_TYPE_NONE, 0);

	/* properties */
	/**
	 * SOUP_MESSAGE_METHOD:
	 *
	 * Alias for the #SoupMessage:method property. (The message's
	 * HTTP method.)
	 **/
	g_object_class_install_property (
		object_class, PROP_METHOD,
		g_param_spec_string (SOUP_MESSAGE_METHOD,
				     "Method",
				     "The message's HTTP method",
				     SOUP_METHOD_GET,
				     G_PARAM_READWRITE));
	/**
	 * SOUP_MESSAGE_URI:
	 *
	 * Alias for the #SoupMessage:uri property. (The message's
	 * #SoupURI.)
	 **/
	g_object_class_install_property (
		object_class, PROP_URI,
		g_param_spec_boxed (SOUP_MESSAGE_URI,
				    "URI",
				    "The message's Request-URI",
				    SOUP_TYPE_URI,
				    G_PARAM_READWRITE));
	/**
	 * SOUP_MESSAGE_HTTP_VERSION:
	 *
	 * Alias for the #SoupMessage:http-version property. (The
	 * message's #SoupHTTPVersion.)
	 **/
	g_object_class_install_property (
		object_class, PROP_HTTP_VERSION,
		g_param_spec_enum (SOUP_MESSAGE_HTTP_VERSION,
				   "HTTP Version",
				   "The HTTP protocol version to use",
				   SOUP_TYPE_HTTP_VERSION,
				   SOUP_HTTP_1_1,
				   G_PARAM_READWRITE));
	/**
	 * SOUP_MESSAGE_FLAGS:
	 *
	 * Alias for the #SoupMessage:flags property. (The message's
	 * #SoupMessageFlags.)
	 **/
	g_object_class_install_property (
		object_class, PROP_FLAGS,
		g_param_spec_flags (SOUP_MESSAGE_FLAGS,
				    "Flags",
				    "Various message options",
				    SOUP_TYPE_MESSAGE_FLAGS,
				    0,
				    G_PARAM_READWRITE));
	/**
	 * SOUP_MESSAGE_SERVER_SIDE:
	 *
	 * Alias for the #SoupMessage:server-side property. (%TRUE if
	 * the message was created by #SoupServer.)
	 **/
	g_object_class_install_property (
		object_class, PROP_SERVER_SIDE,
		g_param_spec_boolean (SOUP_MESSAGE_SERVER_SIDE,
				      "Server-side",
				      "Whether or not the message is server-side rather than client-side",
				      FALSE,
				      G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
	/**
	 * SOUP_MESSAGE_STATUS_CODE:
	 *
	 * Alias for the #SoupMessage:status-code property. (The
	 * message's HTTP response status code.)
	 **/
	g_object_class_install_property (
		object_class, PROP_STATUS_CODE,
		g_param_spec_uint (SOUP_MESSAGE_STATUS_CODE,
				   "Status code",
				   "The HTTP response status code",
				   0, 599, 0,
				   G_PARAM_READWRITE));
	/**
	 * SOUP_MESSAGE_REASON_PHRASE:
	 *
	 * Alias for the #SoupMessage:reason-phrase property. (The
	 * message's HTTP response reason phrase.)
	 **/
	g_object_class_install_property (
		object_class, PROP_REASON_PHRASE,
		g_param_spec_string (SOUP_MESSAGE_REASON_PHRASE,
				     "Reason phrase",
				     "The HTTP response reason phrase",
				     NULL,
				     G_PARAM_READWRITE));
}

static void
set_property (GObject *object, guint prop_id,
	      const GValue *value, GParamSpec *pspec)
{
	SoupMessage *msg = SOUP_MESSAGE (object);
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	switch (prop_id) {
	case PROP_METHOD:
		msg->method = g_intern_string (g_value_get_string (value));
		break;
	case PROP_URI:
		soup_message_set_uri (msg, g_value_get_boxed (value));
		break;
	case PROP_HTTP_VERSION:
		soup_message_set_http_version (msg, g_value_get_enum (value));
		break;
	case PROP_FLAGS:
		soup_message_set_flags (msg, g_value_get_flags (value));
		break;
	case PROP_SERVER_SIDE:
		priv->server_side = g_value_get_boolean (value);
		if (priv->server_side) {
			soup_message_headers_set_encoding (msg->response_headers,
							   SOUP_ENCODING_CONTENT_LENGTH);
		}
		break;
	case PROP_STATUS_CODE:
		soup_message_set_status (msg, g_value_get_uint (value));
		break;
	case PROP_REASON_PHRASE:
		soup_message_set_status_full (msg, msg->status_code,
					      g_value_get_string (value));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
get_property (GObject *object, guint prop_id,
	      GValue *value, GParamSpec *pspec)
{
	SoupMessage *msg = SOUP_MESSAGE (object);
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	switch (prop_id) {
	case PROP_METHOD:
		g_value_set_string (value, msg->method);
		break;
	case PROP_URI:
		g_value_set_boxed (value, priv->uri);
		break;
	case PROP_HTTP_VERSION:
		g_value_set_enum (value, priv->http_version);
		break;
	case PROP_FLAGS:
		g_value_set_flags (value, priv->msg_flags);
		break;
	case PROP_SERVER_SIDE:
		g_value_set_boolean (value, priv->server_side);
		break;
	case PROP_STATUS_CODE:
		g_value_set_uint (value, msg->status_code);
		break;
	case PROP_REASON_PHRASE:
		g_value_set_string (value, msg->reason_phrase);
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}


/**
 * soup_message_new:
 * @method: the HTTP method for the created request
 * @uri_string: the destination endpoint (as a string)
 * 
 * Creates a new empty #SoupMessage, which will connect to @uri
 *
 * Return value: the new #SoupMessage (or %NULL if @uri could not
 * be parsed).
 */
SoupMessage *
soup_message_new (const char *method, const char *uri_string)
{
	SoupMessage *msg;
	SoupURI *uri;

	g_return_val_if_fail (method != NULL, NULL);
	g_return_val_if_fail (uri_string != NULL, NULL);

	uri = soup_uri_new (uri_string);
	if (!uri)
		return NULL;
	if (!uri->host) {
		soup_uri_free (uri);
		return NULL;
	}

	msg = soup_message_new_from_uri (method, uri);
	soup_uri_free (uri);
	return msg;
}

/**
 * soup_message_new_from_uri:
 * @method: the HTTP method for the created request
 * @uri: the destination endpoint (as a #SoupURI)
 * 
 * Creates a new empty #SoupMessage, which will connect to @uri
 *
 * Return value: the new #SoupMessage
 */
SoupMessage *
soup_message_new_from_uri (const char *method, SoupURI *uri)
{
	return g_object_new (SOUP_TYPE_MESSAGE,
			     SOUP_MESSAGE_METHOD, method,
			     SOUP_MESSAGE_URI, uri,
			     NULL);
}

/**
 * soup_message_set_request:
 * @msg: the message
 * @content_type: MIME Content-Type of the body
 * @req_use: a #SoupMemoryUse describing how to handle @req_body
 * @req_body: a data buffer containing the body of the message request.
 * @req_length: the byte length of @req_body.
 * 
 * Convenience function to set the request body of a #SoupMessage. If
 * @content_type is %NULL, the request body must be empty as well.
 */
void
soup_message_set_request (SoupMessage    *msg,
			  const char     *content_type,
			  SoupMemoryUse   req_use,
			  const char     *req_body,
			  gsize           req_length)
{
	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	g_return_if_fail (content_type != NULL || req_length == 0);

	if (content_type) {
		soup_message_headers_replace (msg->request_headers,
					      "Content-Type", content_type);
		soup_message_body_append (msg->request_body, req_use,
					  req_body, req_length);
	} else {
		soup_message_headers_remove (msg->request_headers,
					     "Content-Type");
		soup_message_body_truncate (msg->request_body);
	}
}

/**
 * soup_message_set_response:
 * @msg: the message
 * @content_type: MIME Content-Type of the body
 * @resp_use: a #SoupMemoryUse describing how to handle @resp_body
 * @resp_body: a data buffer containing the body of the message response.
 * @resp_length: the byte length of @resp_body.
 * 
 * Convenience function to set the response body of a #SoupMessage. If
 * @content_type is %NULL, the response body must be empty as well.
 */
void
soup_message_set_response (SoupMessage    *msg,
			   const char     *content_type,
			   SoupMemoryUse   resp_use,
			   const char     *resp_body,
			   gsize           resp_length)
{
	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	g_return_if_fail (content_type != NULL || resp_length == 0);

	if (content_type) {
		soup_message_headers_replace (msg->response_headers,
					      "Content-Type", content_type);
		soup_message_body_append (msg->response_body, resp_use,
					  resp_body, resp_length);
	} else {
		soup_message_headers_remove (msg->response_headers,
					     "Content-Type");
		soup_message_body_truncate (msg->response_body);
	}
}

/**
 * soup_message_wrote_informational:
 * @msg: a #SoupMessage
 *
 * Emits the %wrote_informational signal, indicating that the IO layer
 * finished writing an informational (1xx) response for @msg.
 **/
void
soup_message_wrote_informational (SoupMessage *msg)
{
	g_signal_emit (msg, signals[WROTE_INFORMATIONAL], 0);
}

/**
 * soup_message_wrote_headers:
 * @msg: a #SoupMessage
 *
 * Emits the %wrote_headers signal, indicating that the IO layer
 * finished writing the (non-informational) headers for @msg.
 **/
void
soup_message_wrote_headers (SoupMessage *msg)
{
	g_signal_emit (msg, signals[WROTE_HEADERS], 0);
}

/**
 * soup_message_wrote_chunk:
 * @msg: a #SoupMessage
 *
 * Emits the %wrote_chunk signal, indicating that the IO layer
 * finished writing a chunk of @msg's body.
 **/
void
soup_message_wrote_chunk (SoupMessage *msg)
{
	g_signal_emit (msg, signals[WROTE_CHUNK], 0);
}

/**
 * soup_message_wrote_body_data:
 * @msg: a #SoupMessage
 * @chunk: the data written
 *
 * Emits the %wrote_body_data signal, indicating that the IO layer
 * finished writing a portion of @msg's body.
 **/
void
soup_message_wrote_body_data (SoupMessage *msg, SoupBuffer *chunk)
{
	g_signal_emit (msg, signals[WROTE_BODY_DATA], 0, chunk);
}

/**
 * soup_message_wrote_body:
 * @msg: a #SoupMessage
 *
 * Emits the %wrote_body signal, indicating that the IO layer finished
 * writing the body for @msg.
 **/
void
soup_message_wrote_body (SoupMessage *msg)
{
	g_signal_emit (msg, signals[WROTE_BODY], 0);
}

/**
 * soup_message_got_informational:
 * @msg: a #SoupMessage
 *
 * Emits the %got_informational signal, indicating that the IO layer
 * read a complete informational (1xx) response for @msg.
 **/
void
soup_message_got_informational (SoupMessage *msg)
{
	g_signal_emit (msg, signals[GOT_INFORMATIONAL], 0);
}

/**
 * soup_message_got_headers:
 * @msg: a #SoupMessage
 *
 * Emits the %got_headers signal, indicating that the IO layer
 * finished reading the (non-informational) headers for @msg.
 **/
void
soup_message_got_headers (SoupMessage *msg)
{
	g_signal_emit (msg, signals[GOT_HEADERS], 0);
}

/**
 * soup_message_got_chunk:
 * @msg: a #SoupMessage
 * @chunk: the newly-read chunk
 *
 * Emits the %got_chunk signal, indicating that the IO layer finished
 * reading a chunk of @msg's body.
 **/
void
soup_message_got_chunk (SoupMessage *msg, SoupBuffer *chunk)
{
	g_signal_emit (msg, signals[GOT_CHUNK], 0, chunk);
}

static void
got_body (SoupMessage *req)
{
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (req);
	SoupMessageBody *body;

	body = priv->server_side ? req->request_body : req->response_body;
	if (soup_message_body_get_accumulate (body)) {
		SoupBuffer *buffer;

		buffer = soup_message_body_flatten (body);
		soup_buffer_free (buffer);
	}
}

/**
 * soup_message_got_body:
 * @msg: a #SoupMessage
 *
 * Emits the %got_body signal, indicating that the IO layer finished
 * reading the body for @msg.
 **/
void
soup_message_got_body (SoupMessage *msg)
{
	g_signal_emit (msg, signals[GOT_BODY], 0);
}

/**
 * soup_message_content_sniffed:
 * @msg: a #SoupMessage
 * @type: a string with the sniffed content type
 * @params: a #GHashTable with the parameters
 *
 * Emits the %content_sniffed signal, indicating that the IO layer
 * finished sniffing the content type for @msg. If content sniffing
 * will not be performed, due to the sniffer deciding to trust the
 * Content-Type sent by the server, this signal is emitted immediately
 * after %got_headers, with %NULL as @content_type.
 **/
void
soup_message_content_sniffed (SoupMessage *msg, const char *content_type, GHashTable *params)
{
	g_signal_emit (msg, signals[CONTENT_SNIFFED], 0, content_type, params);
}

static void
restarted (SoupMessage *req)
{
	soup_message_io_stop (req);
}

/**
 * soup_message_restarted:
 * @msg: a #SoupMessage
 *
 * Emits the %restarted signal, indicating that @msg should be
 * requeued.
 **/
void
soup_message_restarted (SoupMessage *msg)
{
	g_signal_emit (msg, signals[RESTARTED], 0);
}

static void
finished (SoupMessage *req)
{
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (req);

	soup_message_io_stop (req);
	priv->io_status = SOUP_MESSAGE_IO_STATUS_FINISHED;
}

/**
 * soup_message_finished:
 * @msg: a #SoupMessage
 *
 * Emits the %finished signal, indicating that @msg has been completely
 * processed.
 **/
void
soup_message_finished (SoupMessage *msg)
{
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	if (priv->io_status != SOUP_MESSAGE_IO_STATUS_FINISHED)
		g_signal_emit (msg, signals[FINISHED], 0);
}

static void
header_handler_free (gpointer header_name, GClosure *closure)
{
	g_free (header_name);
}

static void
header_handler_metamarshal (GClosure *closure, GValue *return_value,
			    guint n_param_values, const GValue *param_values,
			    gpointer invocation_hint, gpointer marshal_data)
{
	SoupMessage *msg = g_value_get_object (&param_values[0]);
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);
	const char *header_name = marshal_data;
	SoupMessageHeaders *hdrs;

	if (priv->io_status != SOUP_MESSAGE_IO_STATUS_RUNNING)
		return;

	hdrs = priv->server_side ? msg->request_headers : msg->response_headers;
	if (soup_message_headers_get_one (hdrs, header_name)) {
		closure->marshal (closure, return_value, n_param_values,
				  param_values, invocation_hint,
				  ((GCClosure *)closure)->callback);
	}
}

/**
 * soup_message_add_header_handler:
 * @msg: a #SoupMessage
 * @signal: signal to connect the handler to.
 * @header: HTTP response header to match against
 * @callback: the header handler
 * @user_data: data to pass to @handler_cb
 *
 * Adds a signal handler to @msg for @signal, as with
 * g_signal_connect(), but with two differences: the @callback will
 * only be run if @msg has a header named @header, and it will only be
 * run if no earlier handler cancelled or requeued the message.
 *
 * If @signal is one of the "got" signals (eg, "got_headers"), or
 * "finished" or "restarted", then @header is matched against the
 * incoming message headers (that is, the #request_headers for a
 * client #SoupMessage, or the #response_headers for a server
 * #SoupMessage). If @signal is one of the "wrote" signals, then
 * @header is matched against the outgoing message headers.
 *
 * Return value: the handler ID from g_signal_connect()
 **/
guint
soup_message_add_header_handler (SoupMessage *msg,
				 const char  *signal,
				 const char  *header,
				 GCallback    callback,
				 gpointer     user_data)
{
	SoupMessagePrivate *priv;
	GClosure *closure;
	char *header_name;

	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), 0);
	g_return_val_if_fail (signal != NULL, 0);
	g_return_val_if_fail (header != NULL, 0);
	g_return_val_if_fail (callback != NULL, 0);

	priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	closure = g_cclosure_new (callback, user_data, NULL);

	header_name = g_strdup (header);
	g_closure_set_meta_marshal (closure, header_name,
				    header_handler_metamarshal);
	g_closure_add_finalize_notifier (closure, header_name,
					 header_handler_free);

	return g_signal_connect_closure (msg, signal, closure, FALSE);
}

static void
status_handler_metamarshal (GClosure *closure, GValue *return_value,
			    guint n_param_values, const GValue *param_values,
			    gpointer invocation_hint, gpointer marshal_data)
{
	SoupMessage *msg = g_value_get_object (&param_values[0]);
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);
	guint status = GPOINTER_TO_UINT (marshal_data);

	if (priv->io_status != SOUP_MESSAGE_IO_STATUS_RUNNING)
		return;

	if (msg->status_code == status) {
		closure->marshal (closure, return_value, n_param_values,
				  param_values, invocation_hint,
				  ((GCClosure *)closure)->callback);
	}
}

/**
 * soup_message_add_status_code_handler:
 * @msg: a #SoupMessage
 * @signal: signal to connect the handler to.
 * @status_code: status code to match against
 * @callback: the header handler
 * @user_data: data to pass to @handler_cb
 *
 * Adds a signal handler to @msg for @signal, as with
 * g_signal_connect() but with two differences: the @callback will
 * only be run if @msg has the status @status_code, and it will only
 * be run if no earlier handler cancelled or requeued the message.
 *
 * @signal must be a signal that will be emitted after @msg's status
 * is set. For a client #SoupMessage, this means it can't be a "wrote"
 * signal. For a server #SoupMessage, this means it can't be a "got"
 * signal.
 *
 * Return value: the handler ID from g_signal_connect()
 **/
guint
soup_message_add_status_code_handler (SoupMessage *msg,
				      const char  *signal,
				      guint        status_code,
				      GCallback    callback,
				      gpointer     user_data)
{
	GClosure *closure;

	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), 0);
	g_return_val_if_fail (signal != NULL, 0);
	g_return_val_if_fail (callback != NULL, 0);

	closure = g_cclosure_new (callback, user_data, NULL);
	g_closure_set_meta_marshal (closure, GUINT_TO_POINTER (status_code),
				    status_handler_metamarshal);

	return g_signal_connect_closure (msg, signal, closure, FALSE);
}


/**
 * soup_message_set_auth:
 * @msg: a #SoupMessage
 * @auth: a #SoupAuth, or %NULL
 *
 * Sets @msg to authenticate to its destination using @auth, which
 * must have already been fully authenticated. If @auth is %NULL, @msg
 * will not authenticate to its destination.
 **/
void
soup_message_set_auth (SoupMessage *msg, SoupAuth *auth)
{
	SoupMessagePrivate *priv;
	char *token;

	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	g_return_if_fail (auth == NULL || SOUP_IS_AUTH (auth));
	g_return_if_fail (auth == NULL || soup_auth_is_authenticated (auth));

	priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	if (priv->auth) {
		g_object_unref (priv->auth);
		soup_message_headers_remove (msg->request_headers,
					     "Authorization");
	}
	priv->auth = auth;
	if (!priv->auth)
		return;

	g_object_ref (priv->auth);
	token = soup_auth_get_authorization (auth, msg);
	soup_message_headers_replace (msg->request_headers,
				      "Authorization", token);
	g_free (token);
}

/**
 * soup_message_get_auth:
 * @msg: a #SoupMessage
 *
 * Gets the #SoupAuth used by @msg for authentication.
 *
 * Return value: the #SoupAuth used by @msg for authentication, or
 * %NULL if @msg is unauthenticated.
 **/
SoupAuth *
soup_message_get_auth (SoupMessage *msg)
{
	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), NULL);

	return SOUP_MESSAGE_GET_PRIVATE (msg)->auth;
}

/**
 * soup_message_set_proxy_auth:
 * @msg: a #SoupMessage
 * @auth: a #SoupAuth, or %NULL
 *
 * Sets @msg to authenticate to its proxy using @auth, which must have
 * already been fully authenticated. If @auth is %NULL, @msg will not
 * authenticate to its proxy.
 **/
void
soup_message_set_proxy_auth (SoupMessage *msg, SoupAuth *auth)
{
	SoupMessagePrivate *priv;
	char *token;

	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	g_return_if_fail (auth == NULL || SOUP_IS_AUTH (auth));
	g_return_if_fail (auth == NULL || soup_auth_is_authenticated (auth));

	priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	if (priv->proxy_auth) {
		g_object_unref (priv->proxy_auth);
		soup_message_headers_remove (msg->request_headers,
					     "Proxy-Authorization");
	}
	priv->proxy_auth = auth;
	if (!priv->proxy_auth)
		return;

	g_object_ref (priv->proxy_auth);
	token = soup_auth_get_authorization (auth, msg);
	soup_message_headers_replace (msg->request_headers,
				      "Proxy-Authorization", token);
	g_free (token);
}

/**
 * soup_message_get_proxy_auth:
 * @msg: a #SoupMessage
 *
 * Gets the #SoupAuth used by @msg for authentication to its proxy..
 *
 * Return value: the #SoupAuth used by @msg for authentication to its
 * proxy, or %NULL if @msg isn't authenticated to its proxy.
 **/
SoupAuth *
soup_message_get_proxy_auth (SoupMessage *msg)
{
	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), NULL);

	return SOUP_MESSAGE_GET_PRIVATE (msg)->proxy_auth;
}

/**
 * soup_message_cleanup_response:
 * @req: a #SoupMessage
 *
 * Cleans up all response data on @req, so that the request can be sent
 * again and receive a new response. (Eg, as a result of a redirect or
 * authorization request.)
 **/
void
soup_message_cleanup_response (SoupMessage *req)
{
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (req);

	soup_message_body_truncate (req->response_body);
	soup_message_headers_clear (req->response_headers);
	if (priv->server_side) {
		soup_message_headers_set_encoding (req->response_headers,
						   SOUP_ENCODING_CONTENT_LENGTH);
	}

	req->status_code = SOUP_STATUS_NONE;
	if (req->reason_phrase) {
		g_free (req->reason_phrase);
		req->reason_phrase = NULL;
	}
	priv->http_version = priv->orig_http_version;

	g_object_notify (G_OBJECT (req), SOUP_MESSAGE_STATUS_CODE);
	g_object_notify (G_OBJECT (req), SOUP_MESSAGE_REASON_PHRASE);
	g_object_notify (G_OBJECT (req), SOUP_MESSAGE_HTTP_VERSION);
}

/**
 * SoupMessageFlags:
 * @SOUP_MESSAGE_NO_REDIRECT: The session should not follow redirect
 * (3xx) responses received by this message.
 * @SOUP_MESSAGE_OVERWRITE_CHUNKS: Deprecated: equivalent to calling
 * soup_message_body_set_accumulate() on the incoming message body
 * (ie, %response_body for a client-side request), passing %FALSE.
 *
 * Various flags that can be set on a #SoupMessage to alter its
 * behavior.
 **/

/**
 * soup_message_set_flags:
 * @msg: a #SoupMessage
 * @flags: a set of #SoupMessageFlags values
 *
 * Sets the specified flags on @msg.
 **/
void
soup_message_set_flags (SoupMessage *msg, SoupMessageFlags flags)
{
	SoupMessagePrivate *priv;

	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	if ((priv->msg_flags ^ flags) & SOUP_MESSAGE_OVERWRITE_CHUNKS) {
		soup_message_body_set_accumulate (
			priv->server_side ? msg->request_body : msg->response_body,
			!(flags & SOUP_MESSAGE_OVERWRITE_CHUNKS));
	}

	priv->msg_flags = flags;
	g_object_notify (G_OBJECT (msg), SOUP_MESSAGE_FLAGS);
}

/**
 * soup_message_get_flags:
 * @msg: a #SoupMessage
 *
 * Gets the flags on @msg
 *
 * Return value: the flags
 **/
SoupMessageFlags
soup_message_get_flags (SoupMessage *msg)
{
	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), 0);

	return SOUP_MESSAGE_GET_PRIVATE (msg)->msg_flags;
}

/**
 * SoupHTTPVersion:
 * @SOUP_HTTP_1_0: HTTP 1.0 (RFC 1945)
 * @SOUP_HTTP_1_1: HTTP 1.1 (RFC 2616)
 *
 * Indicates the HTTP protocol version being used.
 **/

/**
 * soup_message_set_http_version:
 * @msg: a #SoupMessage
 * @version: the HTTP version
 *
 * Sets the HTTP version on @msg. The default version is
 * %SOUP_HTTP_1_1. Setting it to %SOUP_HTTP_1_0 will prevent certain
 * functionality from being used.
 **/
void
soup_message_set_http_version (SoupMessage *msg, SoupHTTPVersion version)
{
	SoupMessagePrivate *priv;

	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	priv->http_version = version;
	if (msg->status_code == SOUP_STATUS_NONE)
		priv->orig_http_version = version;
	g_object_notify (G_OBJECT (msg), SOUP_MESSAGE_HTTP_VERSION);
}

/**
 * soup_message_get_http_version:
 * @msg: a #SoupMessage
 *
 * Gets the HTTP version of @msg. This is the minimum of the
 * version from the request and the version from the response.
 *
 * Return value: the HTTP version
 **/
SoupHTTPVersion
soup_message_get_http_version (SoupMessage *msg)
{
	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), SOUP_HTTP_1_0);

	return SOUP_MESSAGE_GET_PRIVATE (msg)->http_version;
}

/**
 * soup_message_is_keepalive:
 * @msg: a #SoupMessage
 *
 * Determines whether or not @msg's connection can be kept alive for
 * further requests after processing @msg, based on the HTTP version,
 * Connection header, etc.
 *
 * Return value: %TRUE or %FALSE.
 **/
gboolean
soup_message_is_keepalive (SoupMessage *msg)
{
	const char *c_conn, *s_conn;

	c_conn = soup_message_headers_get_list (msg->request_headers,
						"Connection");
	s_conn = soup_message_headers_get_list (msg->response_headers,
						"Connection");

	if (msg->status_code == SOUP_STATUS_OK &&
	    msg->method == SOUP_METHOD_CONNECT)
		return TRUE;

	/* Not persistent if the server sent a terminate-by-EOF response */
	if (soup_message_headers_get_encoding (msg->response_headers) == SOUP_ENCODING_EOF)
		return FALSE;

	if (SOUP_MESSAGE_GET_PRIVATE (msg)->http_version == SOUP_HTTP_1_0) {
		/* Only persistent if the client requested keepalive
		 * and the server agreed.
		 */

		if (!c_conn || !s_conn)
			return FALSE;
		if (!soup_header_contains (c_conn, "Keep-Alive") ||
		    !soup_header_contains (s_conn, "Keep-Alive"))
			return FALSE;
	} else {
		/* Normally persistent unless either side requested otherwise */
		if (c_conn && soup_header_contains (c_conn, "close"))
			return FALSE;
		if (s_conn && soup_header_contains (s_conn, "close"))
			return FALSE;

		return TRUE;
	}

	return TRUE;
}

/**
 * soup_message_set_uri:
 * @msg: a #SoupMessage
 * @uri: the new #SoupURI
 *
 * Sets @msg's URI to @uri. If @msg has already been sent and you want
 * to re-send it with the new URI, you need to call
 * soup_session_requeue_message().
 **/
void
soup_message_set_uri (SoupMessage *msg, SoupURI *uri)
{
	SoupMessagePrivate *priv;

	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	if (priv->uri)
		soup_uri_free (priv->uri);
	if (priv->addr) {
		g_object_unref (priv->addr);
		priv->addr = NULL;
	}
	priv->uri = soup_uri_copy (uri);

	g_object_notify (G_OBJECT (msg), SOUP_MESSAGE_URI);
}

/**
 * soup_message_get_uri:
 * @msg: a #SoupMessage
 *
 * Gets @msg's URI
 *
 * Return value: the URI @msg is targeted for.
 **/
SoupURI *
soup_message_get_uri (SoupMessage *msg)
{
	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), NULL);

	return SOUP_MESSAGE_GET_PRIVATE (msg)->uri;
}

/**
 * soup_message_get_address:
 * @msg: a #SoupMessage
 *
 * Gets the address @msg's URI points to. After first setting the
 * URI on a message, this will be unresolved, although the message's
 * session will resolve it before sending the message.
 *
 * Return value: the address @msg's URI points to
 *
 * Since: 2.26
 **/
SoupAddress *
soup_message_get_address (SoupMessage *msg)
{
	SoupMessagePrivate *priv;

	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), NULL);

	priv = SOUP_MESSAGE_GET_PRIVATE (msg);
	if (!priv->addr) {
		priv->addr = soup_address_new (priv->uri->host,
					       priv->uri->port);
	}
	return priv->addr;
}

/**
 * soup_message_set_status:
 * @msg: a #SoupMessage
 * @status_code: an HTTP status code
 *
 * Sets @msg's status code to @status_code. If @status_code is a
 * known value, it will also set @msg's reason_phrase.
 **/
void
soup_message_set_status (SoupMessage *msg, guint status_code)
{
	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	g_return_if_fail (status_code != 0);

	g_free (msg->reason_phrase);

	msg->status_code = status_code;
	msg->reason_phrase = g_strdup (soup_status_get_phrase (status_code));
	g_object_notify (G_OBJECT (msg), SOUP_MESSAGE_STATUS_CODE);
	g_object_notify (G_OBJECT (msg), SOUP_MESSAGE_REASON_PHRASE);
}

/**
 * soup_message_set_status_full:
 * @msg: a #SoupMessage
 * @status_code: an HTTP status code
 * @reason_phrase: a description of the status
 *
 * Sets @msg's status code and reason phrase.
 **/
void
soup_message_set_status_full (SoupMessage *msg,
			      guint        status_code,
			      const char  *reason_phrase)
{
	g_return_if_fail (SOUP_IS_MESSAGE (msg));
	g_return_if_fail (status_code != 0);
	g_return_if_fail (reason_phrase != NULL);

	g_free (msg->reason_phrase);

	msg->status_code = status_code;
	msg->reason_phrase = g_strdup (reason_phrase);
	g_object_notify (G_OBJECT (msg), SOUP_MESSAGE_STATUS_CODE);
	g_object_notify (G_OBJECT (msg), SOUP_MESSAGE_REASON_PHRASE);
}

void
soup_message_set_io_status (SoupMessage          *msg,
			    SoupMessageIOStatus   status)
{
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	priv->io_status = status;
}

SoupMessageIOStatus
soup_message_get_io_status (SoupMessage *msg)
{
	SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	return priv->io_status;
}

/**
 * SoupChunkAllocator:
 * @msg: the #SoupMessage the chunk is being allocated for
 * @max_len: the maximum length that will be read, or 0.
 * @user_data: the data passed to soup_message_set_chunk_allocator()
 *
 * The prototype for a chunk allocation callback. This should allocate
 * a new #SoupBuffer and return it for the I/O layer to read message
 * body data off the network into.
 *
 * If @max_len is non-0, it indicates the maximum number of bytes that
 * could be read, based on what is known about the message size. Note
 * that this might be a very large number, and you should not simply
 * try to allocate that many bytes blindly. If @max_len is 0, that
 * means that libsoup does not know how many bytes remain to be read,
 * and the allocator should return a buffer of a size that it finds
 * convenient.
 *
 * If the allocator returns %NULL, the message will be paused. It is
 * up to the application to make sure that it gets unpaused when it
 * becomes possible to allocate a new buffer.
 *
 * Return value: the new buffer (or %NULL)
 **/

/**
 * soup_message_set_chunk_allocator:
 * @msg: a #SoupMessage
 * @allocator: the chunk allocator callback
 * @user_data: data to pass to @allocator
 * @destroy_notify: destroy notifier to free @user_data when @msg is
 * destroyed
 *
 * Sets an alternate chunk-allocation function to use when reading
 * @msg's body. Every time data is available to read, libsoup will
 * call @allocator, which should return a #SoupBuffer. (See
 * #SoupChunkAllocator for additional details.) Libsoup will then read
 * data from the network into that buffer, and update the buffer's
 * %length to indicate how much data it read.
 *
 * Generally, a custom chunk allocator would be used in conjunction
 * with soup_message_body_set_accumulate() %FALSE and
 * #SoupMessage::got_chunk, as part of a strategy to avoid unnecessary
 * copying of data. However, you cannot assume that every call to the
 * allocator will be followed by a call to your %got_chunk handler; if
 * an I/O error occurs, then the buffer will be unreffed without ever
 * having been used. If your buffer-allocation strategy requires
 * special cleanup, use soup_buffer_new_with_owner() rather than doing
 * the cleanup from the %got_chunk handler.
 *
 * The other thing to remember when using non-accumulating message
 * bodies is that the buffer passed to the %got_chunk handler will be
 * unreffed after the handler returns, just as it would be in the
 * non-custom-allocated case. If you want to hand the chunk data off
 * to some other part of your program to use later, you'll need to ref
 * the #SoupBuffer (or its owner, in the soup_buffer_new_with_owner()
 * case) to ensure that the data remains valid.
 **/
void
soup_message_set_chunk_allocator (SoupMessage *msg,
				  SoupChunkAllocator allocator,
				  gpointer user_data,
				  GDestroyNotify destroy_notify)
{
	SoupMessagePrivate *priv;

	g_return_if_fail (SOUP_IS_MESSAGE (msg));

	priv = SOUP_MESSAGE_GET_PRIVATE (msg);

	if (priv->chunk_allocator_dnotify)
		priv->chunk_allocator_dnotify (priv->chunk_allocator_data);

	priv->chunk_allocator         = allocator;
	priv->chunk_allocator_data    = user_data;
	priv->chunk_allocator_dnotify = destroy_notify;
}