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//
// WebHttpDispatchOperationSelector.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2008 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Web;
using TemplateTablePair = System.Collections.Generic.KeyValuePair<System.UriTemplate, object>;
namespace System.ServiceModel.Dispatcher
{
public class WebHttpDispatchOperationSelector : IDispatchOperationSelector
{
public const string HttpOperationSelectorUriMatchedPropertyName = "UriMatched";
Dictionary<string,UriTemplateTable> tables = new Dictionary<string,UriTemplateTable> ();
protected WebHttpDispatchOperationSelector ()
{
}
public WebHttpDispatchOperationSelector (ServiceEndpoint endpoint)
{
if (endpoint == null)
throw new ArgumentNullException ("endpoint");
if (endpoint.Address == null)
throw new InvalidOperationException ("EndpointAddress must be set in the argument ServiceEndpoint");
foreach (OperationDescription od in endpoint.Contract.Operations) {
WebAttributeInfo info = od.GetWebAttributeInfo ();
if (info != null) {
UriTemplateTable table;
if (!tables.TryGetValue (info.Method, out table)) {
table = new UriTemplateTable (endpoint.Address.Uri);
tables.Add (info.Method, table);
}
table.KeyValuePairs.Add (new TemplateTablePair (info.BuildUriTemplate (od, null), od));
}
}
}
public string SelectOperation (ref Message message)
{
// FIXME: uriMatched should be used to differentiate 404 and 405 (method not allowed)
bool uriMatched;
return SelectOperation (ref message, out uriMatched);
}
protected virtual string SelectOperation (ref Message message, out bool uriMatched)
{
if (message == null)
throw new ArgumentNullException ("message");
if (message.Properties.ContainsKey (UriMatchedProperty.Name))
throw new ArgumentException (String.Format ("There is already a message property for template-matched URI '{0}'", UriMatchedProperty.Name));
uriMatched = false;
var hp = (HttpRequestMessageProperty) message.Properties [HttpRequestMessageProperty.Name];
OperationDescription od = null;
Message dummy = message; // since lambda expression prohibits ref variable...
Uri to = message.Headers.To;
// First, UriTemplateTable with corresponding HTTP method is tested. Then other tables can be tested for match.
UriTemplateTable table = null;
if (hp != null && hp.Method != null)
tables.TryGetValue (hp.Method, out table);
// FIXME: looks like To header does not matter on .NET. (But how to match then? I have no idea)
UriTemplateMatch match = to == null || table == null ? null : table.MatchSingle (to);
if (to != null && match == null) {
foreach (var tab in tables.Values)
if ((match = tab.MatchSingle (to)) != null) {
table = tab;
break;
}
}
if (match != null) {
uriMatched = true;
foreach (TemplateTablePair p in table.KeyValuePairs)
if (p.Key == match.Template)
od = p.Value as OperationDescription;
}
if (od != null)
message.Properties.Add (UriMatchedProperty.Name, new UriMatchedProperty ());
return uriMatched && od != null ? od.Name : String.Empty;
}
internal class UriMatchedProperty
{
public static string Name = "UriMatched"; // this is what .NET uses for MessageProperty that represents a matched URI.
}
}
}
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