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/*
* Copyright (C) 2008-2010 Nokia Corporation.
* Copyright (C) 2006, 2007, 2008 OpenedHand Ltd.
*
* Author: Zeeshan Ali (Khattak) <zeeshanak@gnome.org>
* <zeeshan.ali@nokia.com>
* Jorn Baayen <jorn.baayen@gmail.com>
*
* This file is part of Rygel.
*
* Rygel 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.
*
* Rygel 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
using Soup;
/**
* Responsible for handling HTTP POST client requests.
*/
internal class Rygel.HTTPPost : HTTPRequest {
SourceFunc handle_continue;
File file;
File dotfile;
OutputStream stream;
public HTTPPost (HTTPServer http_server,
Soup.Server server,
Soup.Message msg) {
base (http_server, server, msg);
this.cancellable.connect (this.on_request_cancelled);
msg.request_body.set_accumulate (false);
}
protected override async void handle () throws Error {
var queue = ObjectRemovalQueue.get_default ();
queue.dequeue (this.object);
try {
yield this.handle_real ();
} catch (Error error) {
yield queue.remove_now (this.object, this.cancellable);
throw error;
}
}
private async void handle_real () throws Error {
if (!(this.object as MediaFileItem).place_holder) {
var msg = _("Pushing data to non-empty item “%s” not allowed");
throw new ContentDirectoryError.INVALID_ARGS (msg, this.object.id);
}
this.file = yield (this.object as MediaFileItem).get_writable
(this.cancellable);
if (this.file == null) {
throw new HTTPRequestError.BAD_REQUEST
(_("No writable URI for %s available"),
this.object.id);
}
this.dotfile = this.file.get_parent ().get_child
("." + this.file.get_basename ());
this.stream = yield this.dotfile.replace_async
(null,
false,
FileCreateFlags.REPLACE_DESTINATION,
Priority.LOW,
this.cancellable);
this.msg.got_chunk.connect (this.on_got_chunk);
this.msg.got_body.connect (this.on_got_body);
this.server.unpause_message (this.msg);
this.handle_continue = this.handle_real.callback;
yield;
}
private void on_got_body (Message msg) {
if (this.msg != msg) {
return;
}
this.finalize_post.begin ();
}
/**
* Waits for an item with @id to change its state to non-placeholder under
* @container, but at most @timeout seconds.
*
* @param container The container to watch for changes
* @param id The child id to look for
* @param timeout Seconds to wait befor cancelling
*/
private async void wait_for_item (MediaContainer container,
string id,
uint timeout) {
MediaFileItem item = null;
while (item == null || item.place_holder) {
try {
item = (yield container.find_object (id,
this.cancellable))
as MediaFileItem;
} catch (Error error) {
// Handle
break;
}
// This means that either someone externally has removed the item
// or that the back-end decided it's not a shareable item anymore.
if (item == null) {
warning ("Item %s disappeared, stop waiting for it", id);
break;
}
if (item.place_holder) {
uint source_id = 0;
source_id = Timeout.add_seconds (timeout, () => {
debug ("Timeout on waiting for 'updated' signal on '%s'.",
container.id);
source_id = 0;
this.wait_for_item.callback ();
return false;
});
var update_id = container.container_updated.connect (() => {
debug ("Finished waiting for update signal from container '%s'",
container.id);
wait_for_item.callback ();
});
yield;
container.disconnect (update_id);
if (source_id != 0) {
Source.remove (source_id);
} else {
break;
}
}
}
}
private async void finalize_post () {
try {
this.stream.close (this.cancellable);
} catch (Error error) {
this.end (Status.INTERNAL_SERVER_ERROR);
this.handle_continue ();
return;
}
this.server.pause_message (this.msg);
debug ("Waiting for update signal from container '%s' after pushing" +
" content to its child item '%s'…",
this.object.parent.id,
this.object.id);
try {
this.dotfile.move (this.file,
FileCopyFlags.NONE,
this.cancellable);
} catch (Error move_error) {
// translators: Dotfile is the filename with prefix "."
warning (_("Failed to move dotfile %s: %s"),
this.dotfile.get_uri (),
move_error.message);
this.server.unpause_message (this.msg);
this.end (Status.INTERNAL_SERVER_ERROR);
this.handle_continue ();
return;
}
yield wait_for_item (this.object.parent, this.object.id, 5);
this.server.unpause_message (this.msg);
this.end (Status.OK);
this.handle_continue ();
}
private void on_got_chunk (Message msg, Buffer chunk) {
try {
this.stream.write_all (chunk.data, null, this.cancellable);
} catch (Error error) {
this.disconnect_message_signals ();
this.handle_error (
new HTTPRequestError.INTERNAL_SERVER_ERROR (error.message));
this.handle_continue ();
}
}
private void on_request_cancelled () {
this.remove_item.begin ();
}
private async void remove_item () {
var queue = ObjectRemovalQueue.get_default ();
yield queue.remove_now (this.object as MediaFileItem, null);
}
private void disconnect_message_signals () {
this.msg.got_body.disconnect (this.on_got_body);
this.msg.got_chunk.disconnect (this.on_got_chunk);
}
}
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