/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * soup-request-http.c: http: URI request object
 *
 * Copyright (C) 2009, 2010 Red Hat, Inc.
 * Copyright (C) 2010 Igalia, S.L.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <glib/gi18n-lib.h>

#include "soup-request-http.h"
#include "soup.h"
#include "soup-message-private.h"
#include "soup-session-private.h"

/**
 * SECTION:soup-request-http
 * @short_description: SoupRequest support for "http" and "https" URIs
 *
 * #SoupRequestHTTP implements #SoupRequest for "http" and "https"
 * URIs.
 *
 * To do more complicated HTTP operations using the #SoupRequest APIs,
 * call soup_request_http_get_message() to get the request's
 * #SoupMessage.
 */

struct _SoupRequestHTTPPrivate {
	SoupMessage *msg;
	char *content_type;
};

G_DEFINE_TYPE_WITH_PRIVATE (SoupRequestHTTP, soup_request_http, SOUP_TYPE_REQUEST)

static void content_sniffed (SoupMessage *msg,
			     const char  *content_type,
			     GHashTable  *params,
			     gpointer     user_data);

static void
soup_request_http_init (SoupRequestHTTP *http)
{
	http->priv = soup_request_http_get_instance_private (http);
}

static gboolean
soup_request_http_check_uri (SoupRequest  *request,
			     SoupURI      *uri,
			     GError      **error)
{
	SoupRequestHTTP *http = SOUP_REQUEST_HTTP (request);

	if (!SOUP_URI_VALID_FOR_HTTP (uri))
		return FALSE;

	http->priv->msg = soup_message_new_from_uri (SOUP_METHOD_GET, uri);
	soup_message_set_soup_request (http->priv->msg, request);

	g_signal_connect (http->priv->msg, "content-sniffed",
			  G_CALLBACK (content_sniffed), http);
	return TRUE;
}

static void
soup_request_http_finalize (GObject *object)
{
	SoupRequestHTTP *http = SOUP_REQUEST_HTTP (object);

	if (http->priv->msg) {
		g_signal_handlers_disconnect_by_func (http->priv->msg,
						      G_CALLBACK (content_sniffed),
						      http);
		g_object_unref (http->priv->msg);
	}

	g_free (http->priv->content_type);

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

static GInputStream *
soup_request_http_send (SoupRequest          *request,
			GCancellable         *cancellable,
			GError              **error)
{
	SoupRequestHTTP *http = SOUP_REQUEST_HTTP (request);
	SoupSession *session = soup_request_get_session (request);

	g_return_val_if_fail (!SOUP_IS_SESSION_ASYNC (session), NULL);

	return soup_session_send (session, http->priv->msg,
				  cancellable, error);
}


static void
http_input_stream_ready_cb (GObject *source, GAsyncResult *result, gpointer user_data)
{
	GTask *task = user_data;
	GError *error = NULL;
	GInputStream *stream;

	stream = soup_session_send_finish (SOUP_SESSION (source), result, &error);
	if (stream)
		g_task_return_pointer (task, stream, g_object_unref);
	else
		g_task_return_error (task, error);
	g_object_unref (task);
}

static void
soup_request_http_send_async (SoupRequest          *request,
			      GCancellable         *cancellable,
			      GAsyncReadyCallback   callback,
			      gpointer              user_data)
{
	SoupRequestHTTP *http = SOUP_REQUEST_HTTP (request);
	SoupSession *session = soup_request_get_session (request);
	GTask *task;

	g_return_if_fail (!SOUP_IS_SESSION_SYNC (session));

	task = g_task_new (request, cancellable, callback, user_data);
	soup_session_send_async (session, http->priv->msg, cancellable,
				 http_input_stream_ready_cb, task);
}

static GInputStream *
soup_request_http_send_finish (SoupRequest   *request,
			       GAsyncResult  *result,
			       GError       **error)
{
	g_return_val_if_fail (g_task_is_valid (result, request), NULL);

	return g_task_propagate_pointer (G_TASK (result), error);
}

static goffset
soup_request_http_get_content_length (SoupRequest *request)
{
	SoupRequestHTTP *http = SOUP_REQUEST_HTTP (request);

	return soup_message_headers_get_content_length (http->priv->msg->response_headers);
}

static void
content_sniffed (SoupMessage *msg,
		 const char  *content_type,
		 GHashTable  *params,
		 gpointer     user_data)
{
	SoupRequestHTTP *http = user_data;
	GString *sniffed_type;

	sniffed_type = g_string_new (content_type);
	if (params) {
		GHashTableIter iter;
		gpointer key, value;

		g_hash_table_iter_init (&iter, params);
		while (g_hash_table_iter_next (&iter, &key, &value)) {
			g_string_append (sniffed_type, "; ");
			soup_header_g_string_append_param (sniffed_type, key, value);
		}
	}
	g_free (http->priv->content_type);
	http->priv->content_type = g_string_free (sniffed_type, FALSE);
}

static const char *
soup_request_http_get_content_type (SoupRequest *request)
{
	SoupRequestHTTP *http = SOUP_REQUEST_HTTP (request);

	return http->priv->content_type;
}

static const char *http_schemes[] = { "http", "https", NULL };

static void
soup_request_http_class_init (SoupRequestHTTPClass *request_http_class)
{
	GObjectClass *object_class = G_OBJECT_CLASS (request_http_class);
	SoupRequestClass *request_class =
		SOUP_REQUEST_CLASS (request_http_class);

	request_class->schemes = http_schemes;

	object_class->finalize = soup_request_http_finalize;

	request_class->check_uri = soup_request_http_check_uri;
	request_class->send = soup_request_http_send;
	request_class->send_async = soup_request_http_send_async;
	request_class->send_finish = soup_request_http_send_finish;
	request_class->get_content_length = soup_request_http_get_content_length;
	request_class->get_content_type = soup_request_http_get_content_type;
}

/**
 * soup_request_http_get_message:
 * @http: a #SoupRequestHTTP object
 *
 * Gets a new reference to the #SoupMessage associated to this SoupRequest
 *
 * Returns: (transfer full): a new reference to the #SoupMessage
 *
 * Since: 2.40
 */
SoupMessage *
soup_request_http_get_message (SoupRequestHTTP *http)
{
	g_return_val_if_fail (SOUP_IS_REQUEST_HTTP (http), NULL);

	return g_object_ref (http->priv->msg);
}