protected override void HandleContext(HttpListenerContext context)
{
base.HandleContext (context);
context.Response.SendChunked = false;
context.Response.ContentLength64 = data.LongLength;
context.Response.ContentType = content_type;
context.Response.OutputStream.Write (data, 0, data.Length);
Log.Information (string.Format (
"{0} requested {1}.", context.Request.RemoteEndPoint, context.Request.Url));
}
protected override void HandleContext(HttpListenerContext context)
{
base.HandleContext (context);
var method = context.Request.HttpMethod.ToUpper ();
if (method == "SUBSCRIBE") {
var callback = context.Request.Headers["CALLBACK"];
if (callback != null) {
Subscribe (context, callback);
} else {
Renew (context);
}
} else if (method == "UNSUBSCRIBE") {
Unsubscribe (context);
} else {
Log.Warning (string.Format (
"A request from {0} to {1} uses an unsupported HTTP method: {2}.",
context.Request.RemoteEndPoint, context.Request.Url, method));
}
}
void Unsubscribe(HttpListenerContext context)
{
var sid = context.Request.Headers["SID"];
if (sid == null) {
Log.Error (string.Format (
"An unsubscribe request from {0} to {1} did not provide an SID.",
context.Request.RemoteEndPoint, context.Request.Url));
return;
}
Subscription subscription;
lock (subscribers) {
if (!subscribers.TryGetValue (sid, out subscription)) {
Log.Error (string.Format (
"An unsubscribe request from {0} to {1} was for subscription {2} which does not exist.",
context.Request.RemoteEndPoint, context.Request.Url, sid));
return;
}
subscribers.Remove (sid);
}
dispatcher.Remove (subscription.TimeoutId);
Log.Information (string.Format ("Subscription {0} was canceled.", sid));
}
void Subscribe(HttpListenerContext context, string callback)
{
var url_string = callback.Length < 3 ? null : callback.Substring (1, callback.Length - 2);
if (url_string == null || !Uri.IsWellFormedUriString (url_string, UriKind.Absolute)) {
Log.Error (string.Format (
"The subscription request from {0} to {1} provided an illegal callback: {2}.",
context.Request.RemoteEndPoint, context.Request.Url, callback));
return;
}
var url = new Uri (url_string);
if (url.Scheme != Uri.UriSchemeHttp) {
Log.Error (string.Format (
"The callback for the subscription request from {0} to {1} is not HTTP: {2}.",
context.Request.RemoteEndPoint, context.Request.Url, url));
return;
}
var uuid = string.Format ("uuid:{0}", Guid.NewGuid ());
var subscriber = new Subscription (url, uuid);
if (!HandleSubscription (context, subscriber)) {
Log.Error (string.Format (
"{0} from {1} failed to subscribe to {0}.",
subscriber.Callback, context.Request.RemoteEndPoint, context.Request.Url));
return;
}
lock (subscribers) {
subscribers.Add (uuid, subscriber);
}
Log.Information (string.Format (
"{0} from {1} subscribed to {2} as {3}.",
subscriber.Callback, context.Request.RemoteEndPoint, context.Request.Url, subscriber.Sid));
// NOTE: This will cause an exception in UpnpServer when it tries to close the OutputStream
// I think we should be ok just closing the response and it should handle closing the OutputStream, but not sure
// We have to finish responding with our previous context otherwise the updates don't mean anything to the client
// The client won't have an SID so it won't make sense to publish the updates yet
context.Response.OutputStream.Close();
context.Response.Close();
PublishUpdates (subscriber, state_variables);
}
void Renew(HttpListenerContext context)
{
var sid = context.Request.Headers["SID"];
if (sid == null) {
Log.Error (string.Format (
"A subscription request from {0} to {1} provided neither a CALLBACK nor a SID.",
context.Request.RemoteEndPoint, context.Request.Url));
return;
}
Subscription subscription;
lock (subscribers) {
if (!subscribers.TryGetValue (sid, out subscription)) {
Log.Error (string.Format (
"A renewal request from {0} to {1} was for subscription {2} which does not exist.",
context.Request.RemoteEndPoint, context.Request.Url, sid));
return;
}
}
if (!HandleSubscription (context, subscription)) {
Log.Error (string.Format ("Failed to renew subscription {0}.", sid));
return;
}
Log.Information (string.Format ("Subscription {0} was renewed.", sid));
}
bool HandleSubscription(HttpListenerContext context, Subscription subscriber)
{
dispatcher.Remove (subscriber.TimeoutId);
var timeout = context.Request.Headers["TIMEOUT"] ?? "Second-1800";
if (timeout != "infinite") {
int time;
if (timeout.Length > 7 && int.TryParse (timeout.Substring (7), out time)) {
subscriber.TimeoutId = dispatcher.Add (TimeSpan.FromSeconds (time), OnTimeout, subscriber.Sid);
} else {
Log.Error (string.Format (
"Subscription request {0} from {1} to {2} has an illegal TIMEOUT value: {3}",
subscriber.Callback, context.Request.RemoteEndPoint, context.Request.Url, timeout));
return false;
}
}
context.Response.AddHeader ("DATE", DateTime.Now.ToString ("r"));
context.Response.AddHeader ("SERVER", Protocol.UserAgent);
context.Response.AddHeader ("SID", subscriber.Sid);
context.Response.AddHeader ("TIMEOUT", timeout);
context.Response.StatusCode = 200;
context.Response.StatusDescription = "OK";
return true;
}
protected override void HandleContext(HttpListenerContext context)
{
base.HandleContext (context);
context.Response.ContentType = @"text/xml; charset=""utf-8""";
context.Response.AddHeader ("EXT", string.Empty);
using (var reader = XmlReader.Create (context.Request.InputStream)) {
// FIXME this is a workaround for mono bug 523151
if (reader.MoveToContent () != XmlNodeType.Element) {
Log.Error (string.Format (
"A control request from {0} to {1} does not have a SOAP envelope.",
context.Request.RemoteEndPoint, context.Request.Url));
return;
}
SoapEnvelope<Arguments> requestEnvelope;
try {
requestEnvelope = deserializer.Deserialize<SoapEnvelope<Arguments>> (reader);
} catch (Exception e) {
Log.Exception (string.Format (
"Failed to deserialize a control request from {0} to {1}.",
context.Request.RemoteEndPoint, context.Request.Url), e);
return;
}
if (requestEnvelope == null) {
Log.Error (string.Format (
"A control request from {0} to {1} does not have a valid SOAP envelope.",
context.Request.RemoteEndPoint, context.Request.Url));
return;
}
var arguments = requestEnvelope.Body;
if (arguments == null) {
Log.Error (string.Format (
"A control request from {0} to {1} does not have a valid argument list.",
context.Request.RemoteEndPoint, context.Request.Url));
return;
}
if (arguments.ActionName == null) {
Log.Error (string.Format (
"A control request from {0} to {1} does not have an action name.",
context.Request.RemoteEndPoint, context.Request.Url));
return;
}
ServiceAction action;
try {
if (actions.TryGetValue (arguments.ActionName, out action)) {
Log.Information (string.Format ("{0} invoked {1} on {2}.",
context.Request.RemoteEndPoint, arguments.ActionName, context.Request.Url));
Arguments result;
try {
result = new Arguments (
service_type, action.Name, action.Execute (arguments.Values), true);
} catch (UpnpControlException) {
throw;
} catch (Exception e) {
throw new UpnpControlException (UpnpError.Unknown (), "Unexpected exception.", e);
}
// TODO If we're allowing consumer code to subclass Argument, then we need to expose that in a
// Mono.Upnp.Serializer class. We would then need to put this in a try/catch because custom
// serialization code could throw.
serializer.Serialize (new SoapEnvelope<Arguments> (result), context.Response.OutputStream);
} else {
throw new UpnpControlException (UpnpError.InvalidAction (), string.Format (
"{0} attempted to invoke the non-existant action {1} on {2}.",
context.Request.RemoteEndPoint, arguments.ActionName, context.Request.Url));
}
} catch (UpnpControlException e) {
Log.Exception (e);
context.Response.StatusCode = 500;
context.Response.StatusDescription = "Internal Server Error";
// TODO This needs to be a try/catch in the future too.
serializer.Serialize (new SoapEnvelope<SoapFault<UpnpError>> (
new SoapFault<UpnpError> (e.UpnpError)), context.Response.OutputStream);
}
}
}
protected virtual void HandleContext(HttpListenerContext context)
{
context.Response.AppendHeader ("SERVER", Protocol.UserAgent);
context.Response.AppendHeader ("DATE", DateTime.Now.ToUniversalTime ().ToString ("r"));
}
