dmap-share.c 36.5 KB
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 * Implmentation of DMAP (e.g., iTunes Music or iPhoto Picture) sharing
 *
 * Copyright (C) 2005 Charles Schmidt <cschmidt2@emich.edu>
 *
 * Modifications Copyright (C) 2008 W. Michael Petullo <mike@flyn.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include "config.h"

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

#include <glib/gi18n.h>

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#include <libdmapsharing/dmap.h>
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#include <libdmapsharing/dmap-structure.h>

#define TYPE_OF_SERVICE "_daap._tcp"
#define STANDARD_DAAP_PORT 3689
#define STANDARD_DPAP_PORT 8770
#define DMAP_VERSION 2.0
#define DAAP_VERSION 3.0
#define DMAP_TIMEOUT 1800
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#define DMAP_STATUS_OK 200
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typedef enum {
	DMAP_SHARE_AUTH_METHOD_NONE              = 0,
	DMAP_SHARE_AUTH_METHOD_NAME_AND_PASSWORD = 1,
	DMAP_SHARE_AUTH_METHOD_PASSWORD          = 2
} DMAPShareAuthMethod;

enum {
	PROP_0,
	PROP_NAME,
	PROP_PASSWORD,
	PROP_REVISION_NUMBER,
	PROP_AUTH_METHOD,
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	PROP_DB,
	PROP_CONTAINER_DB,
	PROP_TRANSCODE_MIMETYPE
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};

struct DMAPSharePrivate {
	gchar *name;
	guint port;
	char *password;
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	/* FIXME: eventually, this should be determined dynamically, based
	 * on what client has connected and its supported mimetypes.
	 */
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	char *transcode_mimetype;
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	DMAPShareAuthMethod auth_method;

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	/* mDNS/DNS-SD publishing things */
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	gboolean server_active;
	gboolean published;
	DmapMdnsPublisher *publisher;

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	/* HTTP server things */
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	SoupServer *server;
	guint revision_number;

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	/* The media database */
	DMAPDb *db;
	DMAPContainerDb *container_db;

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	GHashTable *session_ids;
};

static void dmap_share_init       (DMAPShare *share);
static void dmap_share_class_init (DMAPShareClass *klass);

G_DEFINE_ABSTRACT_TYPE (DMAPShare, dmap_share, G_TYPE_OBJECT)

#define DMAP_SHARE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), \
				   TYPE_DMAP_SHARE, DMAPSharePrivate))

static gboolean
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_dmap_share_soup_auth_callback (SoupAuthDomain *auth_domain,
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		    SoupMessage    *msg,
		    const char     *username,
		    gpointer        password,
		    DMAPShare    *share)
{
	gboolean    allowed;
	const char *path;

	path = soup_message_get_uri (msg)->path;
	g_debug ("Auth request for %s, user %s", path, username);

	allowed = !strcmp (password, share->priv->password);
	g_debug ("Auth request: %s", allowed ? "ALLOWED" : "DENIED");

	return allowed;
}

static void server_info_adapter (SoupServer *server,
				 SoupMessage *message,
				 const char *path,
				 GHashTable *query,
				 SoupClientContext *context,
				 DMAPShare *share)
{
	DMAP_SHARE_GET_CLASS (share)->server_info (share,
						   server,
						   message,
						   path,
						   query,
						   context);
}

static void content_codes_adapter (SoupServer *server,
				   SoupMessage *message,
				   const char *path,
				   GHashTable *query,
				   SoupClientContext *context,
				   DMAPShare *share)
{
	DMAP_SHARE_GET_CLASS (share)->content_codes (share,
						     server,
						     message,
						     path,
						     query,
						     context);
}

static void login_adapter (SoupServer *server,
			   SoupMessage *message,
			   const char *path,
			   GHashTable *query,
			   SoupClientContext *context,
			   DMAPShare *share)
{
	DMAP_SHARE_GET_CLASS (share)->login (share,
					     server,
					     message,
					     path,
					     query,
					     context);
}

static void logout_adapter (SoupServer *server,
			    SoupMessage *message,
			    const char *path,
			    GHashTable *query,
			    SoupClientContext *context,
			    DMAPShare *share)
{
	DMAP_SHARE_GET_CLASS (share)->logout (share,
					      server,
					      message,
					      path,
					      query,
					      context);
}

static void update_adapter (SoupServer *server,
			    SoupMessage *message,
			    const char *path,
			    GHashTable *query,
			    SoupClientContext *context,
			    DMAPShare *share)
{
	DMAP_SHARE_GET_CLASS (share)->update (share,
					      server,
					      message,
					      path,
					      query,
					      context);
}

static void databases_adapter (SoupServer *server,
			       SoupMessage *message,
			       const char *path,
			       GHashTable *query,
			       SoupClientContext *context,
			       DMAPShare *share)
{
	DMAP_SHARE_GET_CLASS (share)->databases (share,
						 server,
						 message,
						 path,
						 query,
						 context);
}

gboolean
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_dmap_share_server_start (DMAPShare *share)
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{
	guint port = DMAP_SHARE_GET_CLASS (share)->get_desired_port (share);
	gboolean              password_required;

	share->priv->server = soup_server_new (SOUP_SERVER_PORT, port, NULL);
	if (share->priv->server == NULL) {
		g_warning ("Unable to start music sharing server on port %d, trying any open port", port);
		share->priv->server = soup_server_new (SOUP_SERVER_PORT, SOUP_ADDRESS_ANY_PORT, NULL);

		if (share->priv->server == NULL) {
			g_warning ("Unable to start music sharing server");
			return FALSE;
		}
	}

	share->priv->port = (guint)soup_server_get_port (share->priv->server);
	g_debug ("Started DMAP server on port %u", share->priv->port);

	password_required = (share->priv->auth_method != DMAP_SHARE_AUTH_METHOD_NONE);

	if (password_required) {
		SoupAuthDomain *auth_domain;

		auth_domain = soup_auth_domain_basic_new (SOUP_AUTH_DOMAIN_REALM, "Music Sharing",
							  SOUP_AUTH_DOMAIN_ADD_PATH, "/login",
							  SOUP_AUTH_DOMAIN_ADD_PATH, "/update",
							  SOUP_AUTH_DOMAIN_ADD_PATH, "/database",
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							  SOUP_AUTH_DOMAIN_FILTER, _dmap_share_soup_auth_filter,
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							  NULL);
		soup_auth_domain_basic_set_auth_callback (auth_domain,
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							  (SoupAuthDomainBasicAuthCallback) _dmap_share_soup_auth_callback,
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							  g_object_ref (share),
							  g_object_unref);
		soup_server_add_auth_domain (share->priv->server, auth_domain);
	}

	soup_server_add_handler (share->priv->server, "/server-info",
				 (SoupServerCallback) server_info_adapter,
				 share, NULL);
	soup_server_add_handler (share->priv->server, "/content-codes",
				 (SoupServerCallback) content_codes_adapter,
				 share, NULL);
	soup_server_add_handler (share->priv->server, "/login",
				 (SoupServerCallback) login_adapter,
				 share, NULL);
	soup_server_add_handler (share->priv->server, "/logout",
				 (SoupServerCallback) logout_adapter,
				 share, NULL);
	soup_server_add_handler (share->priv->server, "/update",
				 (SoupServerCallback) update_adapter,
				 share, NULL);
	soup_server_add_handler (share->priv->server, "/databases",
				 (SoupServerCallback) databases_adapter,
				 share, NULL);
	soup_server_run_async (share->priv->server);

	/* using direct since there is no g_uint_hash or g_uint_equal */
	share->priv->session_ids = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, g_free);

	share->priv->server_active = TRUE;

	return TRUE;
}

static gboolean
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_dmap_share_server_stop (DMAPShare *share)
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{
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W. Michael Petullo committed
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	g_debug ("Stopping music sharing server on port %d", share->priv->port);
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	if (share->priv->server) {
		soup_server_quit (share->priv->server);
		g_object_unref (share->priv->server);
		share->priv->server = NULL;
	}

	if (share->priv->session_ids) {
		g_hash_table_destroy (share->priv->session_ids);
		share->priv->session_ids = NULL;
	}

	share->priv->server_active = FALSE;

	return TRUE;
}

gboolean
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_dmap_share_publish_start (DMAPShare *share)
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{
	gchar *nameprop;
	GError  *error;
	gboolean res;
	gboolean password_required;

	/* FIXME: this is done throughout dmap-share.c. Is this the best way? */
	g_object_get ((gpointer) share, "name", &nameprop, NULL);

	password_required = (share->priv->auth_method != DMAP_SHARE_AUTH_METHOD_NONE);

	error = NULL;
	res = dmap_mdns_publisher_publish (share->priv->publisher,
					      nameprop,
					      share->priv->port,
					      DMAP_SHARE_GET_CLASS (share)->get_type_of_service (share),
					      password_required,
					      &error);

	if (res == FALSE) {
		if (error != NULL) {
			g_warning ("Unable to notify network of media sharing: %s", error->message);
			g_error_free (error);
		} else {
			g_warning ("Unable to notify network of media sharing");
		}
		return FALSE;
	} else {
		g_debug ("Published DMAP server information to mdns");
	}

	g_free (nameprop);

	return TRUE;
}

static gboolean
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_dmap_share_publish_stop (DMAPShare *share)
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{
	if (share->priv->publisher) {
		gboolean res;
		GError  *error;
		error = NULL;
		res = dmap_mdns_publisher_withdraw (share->priv->publisher, &error);
		if (error != NULL) {
			g_warning ("Unable to withdraw music sharing service: %s", error->message);
			g_error_free (error);
		}
		return res;
	}

	share->priv->published = FALSE;
	return TRUE;
}

static void
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_dmap_share_restart (DMAPShare *share)
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{
	gboolean res;

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	_dmap_share_server_stop (share);
	res = _dmap_share_server_start (share);
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	if (res) {
		/* To update information just publish again */
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		_dmap_share_publish_start (share);
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	} else {
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		_dmap_share_publish_stop (share);
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	}
}

static void
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_dmap_share_maybe_restart (DMAPShare *share)
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{
	if (share->priv->published) {
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		_dmap_share_restart (share);
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	}
}

static void
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_dmap_share_set_name (DMAPShare *share, const char  *name)
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{
	GError *error;
	gboolean res;

	g_return_if_fail (share != NULL);

	g_free (share->priv->name);
	share->priv->name = g_strdup (name);

	error = NULL;
	res = dmap_mdns_publisher_set_name (share->priv->publisher,
					    name,
					    &error);
	if (error != NULL) {
		g_warning ("Unable to change MDNS service name: %s",
			   error->message);
		g_error_free (error);
	}
}

static void
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_dmap_share_set_password (DMAPShare *share, const char  *password)
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{
	g_return_if_fail (share != NULL);

	if (share->priv->password && password &&
	    strcmp (password, share->priv->password) == 0) {
		return;
	}

	g_free (share->priv->password);
	share->priv->password = g_strdup (password);
	if (password != NULL) {
		share->priv->auth_method = DMAP_SHARE_AUTH_METHOD_PASSWORD;
	} else {
		share->priv->auth_method = DMAP_SHARE_AUTH_METHOD_NONE;
	}

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	_dmap_share_maybe_restart (share);
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}

static void
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_dmap_share_set_property (GObject *object,
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			 guint prop_id,
			 const GValue *value,
			 GParamSpec *pspec)
{
	DMAPShare *share = DMAP_SHARE (object);

	switch (prop_id) {
	case PROP_NAME:
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		_dmap_share_set_name (share, g_value_get_string (value));
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		break;
	case PROP_PASSWORD:
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		_dmap_share_set_password (share, g_value_get_string (value));
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		break;
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	case PROP_DB:
                share->priv->db = (DMAPDb *) g_value_get_pointer (value);
                break;
        case PROP_CONTAINER_DB:
                share->priv->container_db = (DMAPContainerDb *) g_value_get_pointer (value);
                break;
        case PROP_TRANSCODE_MIMETYPE:
		/* FIXME: get or dup? */
                share->priv->transcode_mimetype = g_value_dup_string (value);
                break;
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	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
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_dmap_share_get_property (GObject *object,
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			 guint prop_id,
			 GValue *value,
			 GParamSpec *pspec)
{
	DMAPShare *share = DMAP_SHARE (object);

	switch (prop_id) {
	case PROP_NAME:
		g_value_set_string (value, share->priv->name);
		break;
	case PROP_PASSWORD:
		g_value_set_string (value, share->priv->password);
		break;
	case PROP_REVISION_NUMBER:
		g_value_set_uint (value,
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				  _dmap_share_get_revision_number
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					(DMAP_SHARE (object)));
		break;
	case PROP_AUTH_METHOD:
		g_value_set_uint (value,
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				  _dmap_share_get_auth_method
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					(DMAP_SHARE (object)));
		break;
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	case PROP_DB:
                g_value_set_pointer (value, share->priv->db);
                break;
        case PROP_CONTAINER_DB:
                g_value_set_pointer (value, share->priv->container_db);
                break;
        case PROP_TRANSCODE_MIMETYPE:
                g_value_set_string (value, share->priv->transcode_mimetype);
                break;
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	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
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_dmap_share_finalize (GObject *object)
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{
	DMAPShare *share = DMAP_SHARE (object);

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	g_debug ("Finalizing DMAPShare");

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	if (share->priv->published) {
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		_dmap_share_publish_stop (share);
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	}

	if (share->priv->server_active) {
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		_dmap_share_server_stop (share);
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	}

	g_free (share->priv->name);
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	g_free (share->priv->password);

	g_object_unref (share->priv->db);
	g_object_unref (share->priv->container_db);
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	if (share->priv->publisher) {
		g_object_unref (share->priv->publisher);
	}

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

static void
dmap_share_class_init (DMAPShareClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

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	object_class->get_property = _dmap_share_get_property;
	object_class->set_property = _dmap_share_set_property;
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	object_class->finalize     = _dmap_share_finalize;
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	/* Pure virtual methods: */
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	klass->get_desired_port     = NULL;
	klass->get_type_of_service  = NULL;
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	klass->message_add_standard_headers = NULL;
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	klass->get_meta_data_map    = NULL;
	klass->add_entry_to_mlcl    = NULL;
	klass->databases_browse_xxx = NULL;
	klass->databases_items_xxx  = NULL;
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	/* Virtual methods: */
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	klass->content_codes  = _dmap_share_content_codes;
	klass->login          = _dmap_share_login;
	klass->logout         = _dmap_share_logout;
	klass->update         = _dmap_share_update;
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	klass->published      = _dmap_share_published;
	klass->name_collision = _dmap_share_name_collision;
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	klass->databases      = _dmap_share_databases;
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	g_object_class_install_property (object_class,
					 PROP_NAME,
					 g_param_spec_string ("name",
						 	    "Name",
							    "Share Name",
							    NULL,
							    G_PARAM_READWRITE));
	g_object_class_install_property (object_class,
					 PROP_PASSWORD,
					 g_param_spec_string ("password",
						      "Authentication password",
						      "Authentication password",
						      NULL,
						      G_PARAM_READWRITE));

	g_object_class_install_property (object_class,
					 PROP_REVISION_NUMBER,
					 g_param_spec_uint ("revision_number",
					 		    "Revision number",
							    "Revision number",
							    0,
							    G_MAXINT,
							    0,
							    G_PARAM_READWRITE));

	g_object_class_install_property (object_class,
					 PROP_AUTH_METHOD,
					 g_param_spec_uint ("auth_method",
					 	"Authentication method",
						"Authentication method",
						DMAP_SHARE_AUTH_METHOD_NONE,
						DMAP_SHARE_AUTH_METHOD_PASSWORD,
						0,
						G_PARAM_READWRITE));
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	g_object_class_install_property (object_class,
                                         PROP_DB,
                                         g_param_spec_pointer ("db",
                                                              "DB",
                                                              "DB object",
                                                               G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));

        g_object_class_install_property (object_class,
                                         PROP_CONTAINER_DB,
                                         g_param_spec_pointer ("container-db",
                                                              "Container DB",
                                                              "Container DB object",
                                                               G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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	g_object_class_install_property (object_class,
                                         PROP_TRANSCODE_MIMETYPE,
                                         g_param_spec_string ("transcode-mimetype",
                                                             "Transcode mimetype",
                                                             "Set mimetype of stream after transcoding",
                                                             NULL,
                                                             G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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	g_type_class_add_private (klass, sizeof (DMAPSharePrivate));
}

static void published_adapter (DmapMdnsPublisher *publisher,
			       const char          *name,
			       DMAPShare         *share)
{
	DMAP_SHARE_GET_CLASS (share)->published (share, publisher, name);
}

static void name_collision_adapter (DmapMdnsPublisher *publisher,
				    const char          *name,
				    DMAPShare         *share)
{
	DMAP_SHARE_GET_CLASS (share)->name_collision (share, publisher, name);
}

static void
dmap_share_init (DMAPShare *share)
{
	share->priv = DMAP_SHARE_GET_PRIVATE (share);

	share->priv->revision_number = 5;
	share->priv->auth_method = DMAP_SHARE_AUTH_METHOD_NONE;
	share->priv->publisher = dmap_mdns_publisher_new ();

	g_signal_connect_object (share->priv->publisher,
				 "published",
				 G_CALLBACK (published_adapter),
				 share, 0);
	g_signal_connect_object (share->priv->publisher,
				 "name-collision",
				 G_CALLBACK (name_collision_adapter),
				 share, 0);
}

guint
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_dmap_share_get_auth_method (DMAPShare *share)
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{
	return share->priv->auth_method;
}

guint
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_dmap_share_get_revision_number (DMAPShare *share)
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{
	return share->priv->revision_number;
}



static gboolean
get_session_id (GHashTable *query,
		guint32    *id)
{
	char *session_id_str;
	guint32 session_id;

	session_id_str = g_hash_table_lookup (query, "session-id");
	if (session_id_str == NULL) {
		g_warning ("Session id not found.");
		return FALSE;
	}

	session_id = (guint32) strtoul (session_id_str, NULL, 10);
	if (id != NULL) {
		*id = session_id;
	}
	return TRUE;
}

gboolean
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_dmap_share_get_revision_number_from_query (GHashTable *query,
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		     guint *number)
{
	char *revision_number_str;
	guint revision_number;

	revision_number_str = g_hash_table_lookup (query, "revision-number");
	if (revision_number_str == NULL) {
		g_warning ("Client asked for an update without a rev. number");
		return FALSE;
	}

	revision_number = strtoul (revision_number_str, NULL, 10);
	if (number != NULL) {
		*number = revision_number;
	}
	return TRUE;
}

gboolean
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_dmap_share_session_id_validate (DMAPShare       *share,
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		     SoupClientContext *context,
		     SoupMessage       *message,
		     GHashTable        *query,
		     guint32           *id)
{
	guint32     session_id;
	gboolean    res;
	const char *addr;
	const char *remote_address;

	if (id) {
		*id = 0;
	}

	res = get_session_id (query, &session_id);
	if (! res) {
		g_warning ("Validation failed: Unable to parse session id");
		return FALSE;
	}

	/* check hash for remote address */
	addr = g_hash_table_lookup (share->priv->session_ids,
				    GUINT_TO_POINTER (session_id));
	if (addr == NULL) {
		g_warning ("Validation failed: Unable to lookup session id %u",
			   session_id);
		return FALSE;
	}

	remote_address = soup_client_context_get_host (context);
	g_debug ("Validating session id %u from %s matches %s",
		  session_id, remote_address, addr);
	if (remote_address == NULL || strcmp (addr, remote_address) != 0) {
		g_warning ("Validation failed: Remote address does not match stored address");
		return FALSE;
	}

	if (id) {
		*id = session_id;
	}

	return TRUE;
}

static guint32
session_id_generate (DMAPShare       *share,
		     SoupClientContext *context)
{
	guint32 id;

	id = g_random_int ();

	return id;
}

guint32
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_dmap_share_session_id_create (DMAPShare       *share,
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		   SoupClientContext *context)
{
	guint32     id;
	const char *addr;
	char       *remote_address;

	do {
		/* create a unique session id */
		id = session_id_generate (share, context);
		g_debug ("Generated session id %u", id);

		/* if already used, try again */
		addr = g_hash_table_lookup (share->priv->session_ids,
					    GUINT_TO_POINTER (id));
	} while	(addr != NULL);

	/* store session id and remote address */
	remote_address = g_strdup (soup_client_context_get_host (context));
	g_hash_table_insert (share->priv->session_ids, GUINT_TO_POINTER (id),
			     remote_address);

	return id;
}

void
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_dmap_share_session_id_remove (DMAPShare       *share,
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		   SoupClientContext *context,
		   guint32            id)
{
	g_hash_table_remove (share->priv->session_ids, GUINT_TO_POINTER (id));
}

void
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_dmap_share_message_set_from_dmap_structure (DMAPShare *share,
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					    SoupMessage *message,
				    	    GNode *structure)
{
	gchar *resp;
	guint length;

	resp = dmap_structure_serialize (structure, &length);

	if (resp == NULL) {
		g_warning ("Serialize gave us null?\n");
		return;
	}

	soup_message_set_response (message, "application/x-dmap-tagged",
				   SOUP_MEMORY_TAKE, resp, length);

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	DMAP_SHARE_GET_CLASS (share)->message_add_standard_headers (share,
								    message);
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	soup_message_set_status (message, SOUP_STATUS_OK);
}


gboolean
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_dmap_share_client_requested (bitwise bits,
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		  gint field)
{
	return 0 != (bits & (((bitwise) 1) << field));
}

gboolean
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_dmap_share_uri_is_local (const char *text_uri)
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{
        return g_str_has_prefix (text_uri, "file://");
}

gboolean
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_dmap_share_soup_auth_filter (SoupAuthDomain *auth_domain,
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		  SoupMessage    *msg,
		  gpointer        user_data)
{
	const char *path;

	path = soup_message_get_uri (msg)->path;
	if (g_str_has_prefix (path, "/databases/")) {
		/* Subdirectories of /databases don't actually require
		 * authentication
		 */
		return FALSE;
	} else {
		/* Everything else in auth_domain's paths, including
		 * /databases itself, does require auth.
		 */
		return TRUE;
	}
}

void
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_dmap_share_published (DMAPShare         *share,
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		      DmapMdnsPublisher *publisher,
		      const char        *name)
{
	gchar *nameprop;

	g_object_get ((gpointer) share, "name", &nameprop, NULL);

        if (nameprop == NULL || name == NULL) {
		g_free (nameprop);
                return;
        }

        if (strcmp (nameprop, name) == 0) {
                g_debug ("mDNS publish successful");
                share->priv->published = TRUE;
        }

	g_free (nameprop);
}

void
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_dmap_share_name_collision (DMAPShare         *share,
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			   DmapMdnsPublisher *publisher,
			   const char        *name)
{
	gchar *nameprop;
        char *new_name = "FIXME";

	g_object_get ((gpointer) share, "name", &nameprop, NULL);

        if (nameprop == NULL || name == NULL) {
		g_free (nameprop);
                return;
        }

        if (strcmp (nameprop, name) == 0) {
                g_warning ("Duplicate share name on mDNS");

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                _dmap_share_set_name (DMAP_SHARE(share), new_name);
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                g_free (new_name);
        }

	g_free (nameprop);

        return;
}

void
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_dmap_share_content_codes (DMAPShare *share,
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		  SoupServer        *server,
		  SoupMessage       *message,
		  const char        *path,
		  GHashTable        *query,
		  SoupClientContext *context)
{
/* MCCR content codes response
 * 	MSTT status
 * 	MDCL dictionary
 * 		MCNM content codes number
 * 		MCNA content codes name
 * 		MCTY content codes type
 * 	MDCL dictionary
 * 	...
 */
	const DMAPContentCodeDefinition *defs;
	guint num_defs = 0;
	guint i;
	GNode *mccr;

	g_debug ("Path is %s.", path);

	defs = dmap_content_codes (&num_defs);

	mccr = dmap_structure_add (NULL, DMAP_CC_MCCR);
	dmap_structure_add (mccr, DMAP_CC_MSTT, (gint32) DMAP_STATUS_OK);

	for (i = 0; i < num_defs; i++) {
		GNode *mdcl;

		mdcl = dmap_structure_add (mccr, DMAP_CC_MDCL);
		dmap_structure_add (mdcl, DMAP_CC_MCNM, dmap_content_code_string_as_int32(defs[i].string));
		dmap_structure_add (mdcl, DMAP_CC_MCNA, defs[i].name);
		dmap_structure_add (mdcl, DMAP_CC_MCTY, (gint32) defs[i].type);
	}

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	_dmap_share_message_set_from_dmap_structure (share, message, mccr);
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	dmap_structure_destroy (mccr);
}

void
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_dmap_share_login (DMAPShare *share,
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	  SoupServer        *server,
	  SoupMessage       *message,
	  const char        *path,
	  GHashTable        *query,
	  SoupClientContext *context)
{
/* MLOG login response
 * 	MSTT status
 * 	MLID session id
 */
	GNode *mlog;
	guint32 session_id;

	g_debug ("Path is %s.", path);

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	session_id = _dmap_share_session_id_create (share, context);
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	mlog = dmap_structure_add (NULL, DMAP_CC_MLOG);
	dmap_structure_add (mlog, DMAP_CC_MSTT, (gint32) DMAP_STATUS_OK);
	dmap_structure_add (mlog, DMAP_CC_MLID, session_id);

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	_dmap_share_message_set_from_dmap_structure (share, message, mlog);
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	dmap_structure_destroy (mlog);
}

void
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_dmap_share_logout (DMAPShare *share,
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	   SoupServer        *server,
	   SoupMessage       *message,
	   const char        *path,
	   GHashTable        *query,
	   SoupClientContext *context)
{
	int     status;
	guint32 id;

	g_debug ("Path is %s.", path);

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	if (_dmap_share_session_id_validate (share, context, message, query, &id)) {
		_dmap_share_session_id_remove (share, context, id);
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		status = SOUP_STATUS_NO_CONTENT;
	} else {
		status = SOUP_STATUS_FORBIDDEN;
	}

	soup_message_set_status (message, status);
}

void
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_dmap_share_update (DMAPShare *share,
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	   SoupServer        *server,
	   SoupMessage       *message,
	   const char        *path,
	   GHashTable        *query,
	   SoupClientContext *context)
{
	guint    revision_number;
	gboolean res;

	g_debug ("Path is %s.", path);

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	res = _dmap_share_get_revision_number_from_query (query, &revision_number);
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	if (res && revision_number != _dmap_share_get_revision_number (share)) {
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		/* MUPD update response
		 * 	MSTT status
		 * 	MUSR server revision
		 */
		GNode *mupd;

		mupd = dmap_structure_add (NULL, DMAP_CC_MUPD);
		dmap_structure_add (mupd, DMAP_CC_MSTT, (gint32) DMAP_STATUS_OK);
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		dmap_structure_add (mupd, DMAP_CC_MUSR, (gint32) _dmap_share_get_revision_number (share));
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		_dmap_share_message_set_from_dmap_structure (share, message, mupd);
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		dmap_structure_destroy (mupd);
	} else {
		/* FIXME: This seems like a bug. It just leaks the
		 * message (and socket) without ever replying.
		 */
		g_object_ref (message);
		soup_server_pause_message (server, message);
	}
}

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_dmap_share_parse_meta_str (const char *attrs, struct DMAPMetaDataMap *mdm)
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{
	guint i;
	bitwise bits = 0;

	/* iTunes 8 uses meta=all for /databases/1/items query: */
	if (strcmp (attrs, "all") == 0) {
		bits = ~0;
	} else {
		gchar **attrsv;
	
		attrsv = g_strsplit (attrs, ",", -1);

		for (i = 0; attrsv[i]; i++) {
			guint j;

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			for (j = 0; mdm[j].tag; j++) {
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				if (strcmp (mdm[j].tag, attrsv[i]) == 0) {
					bits |= (((bitwise) 1) << mdm[j].md);
				}
			}
		}
		g_strfreev (attrsv);
	}	

	return bits;
}

bitwise
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_dmap_share_parse_meta (GHashTable *query, struct DMAPMetaDataMap *mdm)
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{
	const gchar *attrs;

	attrs = g_hash_table_lookup (query, "meta");
	if (attrs == NULL) {
		return 0;
	}
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	return _dmap_share_parse_meta_str (attrs, mdm);
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}

void
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_dmap_share_add_playlist_to_mlcl (gpointer id, DMAPContainerRecord *record, gpointer mlcl)
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{
	/* MLIT listing item
	 * MIID item id
	 * MPER persistent item id
	 * MINM item name
	 * MIMC item count
	 */
	GNode *mlit;
	guint num_songs;
	gchar *name;

	num_songs = dmap_container_record_get_entry_count (record);
	g_object_get (record, "name", &name, NULL);

	mlit = dmap_structure_add ((GNode *) mlcl, DMAP_CC_MLIT);
	dmap_structure_add (mlit, DMAP_CC_MIID, dmap_container_record_get_id (record));
	/* we don't have a persistant ID for playlists, unfortunately */
	dmap_structure_add (mlit, DMAP_CC_MPER, (gint64) dmap_container_record_get_id (record));
	dmap_structure_add (mlit, DMAP_CC_MINM, name);
	dmap_structure_add (mlit, DMAP_CC_MIMC, (gint32) num_songs);

	return;
} 
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GSList *
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W. Michael Petullo committed
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_dmap_share_build_filter (gchar *filterstr)
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{
	/* Produces a list of lists, each being a filter definition that may
	 * be one or more filter criteria.
	 */

	/* A filter string looks like (iTunes):
	 * 'daap.songgenre:Other'+'daap.songartist:Band'.
	 * or (Roku):
	 * 'daap.songgenre:Other' 'daap.songartist:Band'.
	 * or
         * 'dmap.itemid:1000'
	 * or
         * 'dmap.itemid:1000','dmap:itemid:1001'
	 * or
	 * 'daap.songgenre:Foo'+'daap.songartist:Bar'+'daap.songalbum:Baz'
	 * or (iPhoto '09)
	 * ('daap.idemid:1000','dmap:itemid:1001')
         */

	size_t len;
	GSList *list = NULL;

	g_debug ("Filter string is %s.", filterstr);

	len = strlen (filterstr);
	filterstr = *filterstr == '(' ? filterstr + 1 : filterstr;
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	/* FIXME: I thought this should be -1, but there is a trailing ' ' in iPhoto '09: */
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	filterstr[len - 2] = filterstr[len - 2] == ')' ? 0x00 : filterstr[len - 2];

	if (filterstr != NULL) {
		int i;
		gchar **t1 = g_strsplit (filterstr, ",", 0);

		for (i = 0; t1[i]; i++) {
			int j;
			GSList *filter = NULL;
			gchar **t2;

			t2 = _dmap_db_strsplit_using_quotes (t1[i]);

			for (j = 0; t2[j]; j++) {
				FilterDefinition *def;
				gchar **t3;

				t3 = g_strsplit (t2[j], ":", 0);

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				def = g_new0 (FilterDefinition, 1);
				def->key   = g_strdup (t3[0]);
				def->value = g_strdup (t3[1]);

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				if (g_strcasecmp ("dmap.itemid", t3[0]) == 0) {
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					def->is_string = FALSE;
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				} else {
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					def->is_string = TRUE;
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				}

				if (def != NULL)
					filter = g_slist_append (filter, def);

				g_strfreev (t3);
			}

			list = g_slist_append (list, filter);

			g_strfreev (t2);
		}
		g_strfreev (t1);
	}

        return list;
}

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void
dmap_share_free_filter (GSList *filter)
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{
        GSList *ptr1, *ptr2;

        for (ptr1 = filter; ptr1 != NULL; ptr1 = ptr1->next) {
                for (ptr2 = ptr1->data; ptr2 != NULL; ptr2 = ptr2->next) {
                        g_free (((FilterDefinition *) ptr2->data)->value);
                        g_free (ptr2->data);
                }
        }
}

static void
debug_param (gpointer key, gpointer val, gpointer user_data)
{
        g_debug ("%s %s", (char *) key, (char *) val);
}

void
_dmap_share_databases (DMAPShare *share,
		       SoupServer        *server,
		       SoupMessage       *message,
		       const char        *path,
		       GHashTable        *query,
		       SoupClientContext *context)

{
	const char *rest_of_path;

	g_debug ("Path is %s.", path);
	g_hash_table_foreach (query, debug_param, NULL);

	if (! _dmap_share_session_id_validate (share, context, message, query, NULL)) {
		soup_message_set_status (message, SOUP_STATUS_FORBIDDEN);
		return;
	}

	rest_of_path = strchr (path + 1, '/');

	if (rest_of_path == NULL) {
	/* AVDB server databases
	 * 	MSTT status
	 * 	MUTY update type
	 * 	MTCO specified total count
	 * 	MRCO returned count
	 * 	MLCL listing
	 * 		MLIT listing item
	 * 			MIID item id
	 * 			MPER persistent id
	 * 			MINM item name
	 * 			MIMC item count
	 * 			MCTC container count
	 */
		gchar *nameprop;
		GNode *avdb;
		GNode *mlcl;
		GNode *mlit;

		g_object_get ((gpointer) share, "name", &nameprop, NULL);

		avdb = dmap_structure_add (NULL, DMAP_CC_AVDB);
		dmap_structure_add (avdb, DMAP_CC_MSTT, (gint32) DMAP_STATUS_OK);
		dmap_structure_add (avdb, DMAP_CC_MUTY, 0);
		dmap_structure_add (avdb, DMAP_CC_MTCO, (gint32) 1);
		dmap_structure_add (avdb, DMAP_CC_MRCO, (gint32) 1);
		mlcl = dmap_structure_add (avdb, DMAP_CC_MLCL);
		mlit = dmap_structure_add (mlcl, DMAP_CC_MLIT);
		dmap_structure_add (mlit, DMAP_CC_MIID, (gint32) 1);
		dmap_structure_add (mlit, DMAP_CC_MPER, (gint64) 1);
		dmap_structure_add (mlit, DMAP_CC_MINM, nameprop);
		dmap_structure_add (mlit, DMAP_CC_MIMC, dmap_db_count (share->priv->db));
		dmap_structure_add (mlit, DMAP_CC_MCTC, (gint32) 1);

		_dmap_share_message_set_from_dmap_structure (share, message, avdb);
		dmap_structure_destroy (avdb);

		g_free (nameprop);
	} else if (g_ascii_strcasecmp ("/1/items", rest_of_path) == 0) {
	/* ADBS database songs
	 * 	MSTT status
	 * 	MUTY update type
	 * 	MTCO specified total count
	 * 	MRCO returned count
	 * 	MLCL listing
	 * 		MLIT
	 * 			attrs
	 * 		MLIT
	 * 		...
	 */
		GNode *adbs;
		gchar *record_query;
		GHashTable *records = NULL;
		struct DMAPMetaDataMap *map;
		gint32 num_songs;
		struct MLCL_Bits mb = {NULL,0};

		record_query = g_hash_table_lookup (query, "query");
		if (record_query) {
			GSList *filter_def;
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			filter_def = _dmap_share_build_filter (record_query);
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			records = dmap_db_apply_filter (DMAP_DB (share->priv->db), filter_def);
			g_debug ("Found %d records", g_hash_table_size (records));
			num_songs = g_hash_table_size (records);
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			dmap_share_free_filter (filter_def);
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		} else {
			num_songs = dmap_db_count (share->priv->db);
		}

		map = DMAP_SHARE_GET_CLASS (share)->get_meta_data_map (share);
		mb.bits = _dmap_share_parse_meta (query, map);

		adbs = dmap_structure_add (NULL, DMAP_CC_ADBS);
		dmap_structure_add (adbs, DMAP_CC_MSTT, (gint32) DMAP_STATUS_OK);
		dmap_structure_add (adbs, DMAP_CC_MUTY, 0);
		dmap_structure_add (adbs, DMAP_CC_MTCO, (gint32) num_songs);
		dmap_structure_add (adbs, DMAP_CC_MRCO, (gint32) num_songs);
		mb.mlcl = dmap_structure_add (adbs, DMAP_CC_MLCL);

		if (record_query) {
			g_hash_table_foreach (records, (GHFunc) DMAP_SHARE_GET_CLASS (share)->add_entry_to_mlcl, &mb);
			/* Free hash table but not data: */
			g_hash_table_destroy (records);
		} else {
			dmap_db_foreach (share->priv->db, (GHFunc) DMAP_SHARE_GET_CLASS (share)->add_entry_to_mlcl, &mb);
		}

		_dmap_share_message_set_from_dmap_structure (share, message, adbs);
		dmap_structure_destroy (adbs);
		adbs = NULL;
	} else if (g_ascii_strcasecmp ("/1/containers", rest_of_path) == 0) {
	/* APLY database playlists
	 * 	MSTT status
	 * 	MUTY update type
	 * 	MTCO specified total count
	 * 	MRCO returned count
	 * 	MLCL listing
	 * 		MLIT listing item
	 * 			MIID item id
	 * 			MPER persistent item id
	 * 			MINM item name
	 * 			MIMC item count
	 * 			ABPL baseplaylist (only for base)
	 * 		MLIT
	 * 		...
	 */
		gchar *nameprop;
		GNode *aply;
		GNode *mlcl;
		GNode *mlit;

		g_object_get ((gpointer) share, "name", &nameprop, NULL);

		aply = dmap_structure_add (NULL, DMAP_CC_APLY);
		dmap_structure_add (aply, DMAP_CC_MSTT, (gint32) DMAP_STATUS_OK);
		dmap_structure_add (aply, DMAP_CC_MUTY, 0);
		dmap_structure_add (aply, DMAP_CC_MTCO, (gint32) dmap_container_db_count (share->priv->container_db) + 1);
		dmap_structure_add (aply, DMAP_CC_MRCO, (gint32) dmap_container_db_count (share->priv->container_db) + 1);
		mlcl = dmap_structure_add (aply, DMAP_CC_MLCL);

		/* Base playlist: */
		mlit = dmap_structure_add (mlcl, DMAP_CC_MLIT);
		dmap_structure_add (mlit, DMAP_CC_MIID, (gint32) 1);
		dmap_structure_add (mlit, DMAP_CC_MPER, (gint64) 1);
		dmap_structure_add (mlit, DMAP_CC_MINM, nameprop);
		dmap_structure_add (mlit, DMAP_CC_MIMC, dmap_db_count (share->priv->db));
		dmap_structure_add (mlit, DMAP_CC_ABPL, (gchar) 1);

		dmap_container_db_foreach (share->priv->container_db, (GHFunc) _dmap_share_add_playlist_to_mlcl, (gpointer) mlcl);

		_dmap_share_message_set_from_dmap_structure (share, message, aply);
		dmap_structure_destroy (aply);

		g_free (nameprop);
	} else if (g_ascii_strncasecmp ("/1/containers/", rest_of_path, 14) == 0) {
	/* APSO playlist songs
	 * 	MSTT status
	 * 	MUTY update type
	 * 	MTCO specified total count
	 * 	MRCO returned count
	 * 	MLCL listing
	 * 		MLIT listing item
	 * 			MIKD item kind
	 * 			MIID item id
	 * 			MCTI container item id
	 * 		MLIT
	 * 		...
	 */
		GNode *apso;
		struct DMAPMetaDataMap *map;
		struct MLCL_Bits mb = {NULL,0};
		gint pl_id = atoi (rest_of_path + 14);

		map = DMAP_SHARE_GET_CLASS (share)->get_meta_data_map (share);
		mb.bits = _dmap_share_parse_meta (query, map);

		apso = dmap_structure_add (NULL, DMAP_CC_APSO);
		dmap_structure_add (apso, DMAP_CC_MSTT, (gint32) DMAP_STATUS_OK);
		dmap_structure_add (apso, DMAP_CC_MUTY, 0);

		if (pl_id == 1) {
			gint32 num_songs = dmap_db_count (share->priv->db);
			dmap_structure_add (apso, DMAP_CC_MTCO, (gint32) num_songs);
			dmap_structure_add (apso, DMAP_CC_MRCO, (gint32) num_songs);
			mb.mlcl = dmap_structure_add (apso, DMAP_CC_MLCL);

			dmap_db_foreach (share->priv->db, (GHFunc) DMAP_SHARE_GET_CLASS (share)->add_entry_to_mlcl, &mb);
		} else {
			DMAPContainerRecord *record;
			const DMAPDb *entries;
			guint num_songs;
			
			record = dmap_container_db_lookup_by_id (share->priv->container_db, pl_id);
			entries = dmap_container_record_get_entries (record);
			num_songs = dmap_db_count (entries);
			
			dmap_structure_add (apso, DMAP_CC_MTCO, (gint32) num_songs);
			dmap_structure_add (apso, DMAP_CC_MRCO, (gint32) num_songs);
			mb.mlcl = dmap_structure_add (apso, DMAP_CC_MLCL);

			dmap_db_foreach (entries, (GHFunc) DMAP_SHARE_GET_CLASS (share)->add_entry_to_mlcl, &mb);

			g_object_unref (record);
		}

		_dmap_share_message_set_from_dmap_structure (share, message, apso);
		dmap_structure_destroy (apso);
	} else if (g_ascii_strncasecmp ("/1/browse/", rest_of_path, 9) == 0) {
		 DMAP_SHARE_GET_CLASS (share)->databases_browse_xxx (
			share,
			server,
			message,
			path,
			query,
			context);
	} else if (g_ascii_strncasecmp ("/1/items/", rest_of_path, 9) == 0) {
	/* just the file :) */
		 DMAP_SHARE_GET_CLASS (share)->databases_items_xxx (
			share,
			server,
			message,
			path,
			query,
			context);
	} else {
		g_warning ("Unhandled: %s\n", path);
	}
}