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//------------------------------------------------------------------------------
// <copyright file="ScriptHandlerFactory.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
using System.Web.SessionState;
using System.Security.Permissions;
using System.Security;
namespace System.Web.Script.Services {
internal class ScriptHandlerFactory : IHttpHandlerFactory {
IHttpHandlerFactory _restHandlerFactory;
IHttpHandlerFactory _webServiceHandlerFactory;
internal class HandlerWrapper : IHttpHandler {
protected IHttpHandler _originalHandler;
private IHttpHandlerFactory _originalFactory;
internal HandlerWrapper(IHttpHandler originalHandler, IHttpHandlerFactory originalFactory) {
_originalFactory = originalFactory;
_originalHandler = originalHandler;
}
internal void ReleaseHandler() {
_originalFactory.ReleaseHandler(_originalHandler);
}
public bool IsReusable {
get {
return _originalHandler.IsReusable;
}
}
public void ProcessRequest(HttpContext context) {
_originalHandler.ProcessRequest(context);
}
}
internal class HandlerWrapperWithSession : HandlerWrapper, IRequiresSessionState {
internal HandlerWrapperWithSession(IHttpHandler originalHandler, IHttpHandlerFactory originalFactory)
: base(originalHandler, originalFactory) {}
}
private class AsyncHandlerWrapper : HandlerWrapper, IHttpAsyncHandler {
internal AsyncHandlerWrapper(IHttpHandler originalHandler, IHttpHandlerFactory originalFactory)
:
base(originalHandler, originalFactory) { }
public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData) {
return ((IHttpAsyncHandler)_originalHandler).BeginProcessRequest(context, cb, extraData);
}
public void EndProcessRequest(IAsyncResult result) {
((IHttpAsyncHandler)_originalHandler).EndProcessRequest(result);
}
}
private class AsyncHandlerWrapperWithSession : AsyncHandlerWrapper, IRequiresSessionState {
internal AsyncHandlerWrapperWithSession(IHttpHandler originalHandler, IHttpHandlerFactory originalFactory)
: base(originalHandler, originalFactory) { }
}
public ScriptHandlerFactory() {
_restHandlerFactory = new RestHandlerFactory();
_webServiceHandlerFactory = new System.Web.Services.Protocols.WebServiceHandlerFactory();
}
[SecuritySafeCritical]
public virtual IHttpHandler GetHandler(HttpContext context, string requestType, string url, string pathTranslated) {
IHttpHandler handler;
IHttpHandlerFactory factory;
if (RestHandlerFactory.IsRestRequest(context)) {
// It's a REST request
factory = _restHandlerFactory;
}
else {
// It's a regular asmx web request, so delegate to the WebServiceHandlerFactory
factory = _webServiceHandlerFactory;
}
handler = factory.GetHandler(context, requestType, url, pathTranslated);
bool requiresSession = handler is IRequiresSessionState;
if (handler is IHttpAsyncHandler) {
if (requiresSession)
return new AsyncHandlerWrapperWithSession(handler, factory);
else
return new AsyncHandlerWrapper(handler, factory);
}
if (requiresSession)
return new HandlerWrapperWithSession(handler, factory);
else
return new HandlerWrapper(handler, factory);
}
public virtual void ReleaseHandler(IHttpHandler handler) {
if (handler == null) {
throw new ArgumentNullException("handler");
}
((HandlerWrapper)handler).ReleaseHandler();
}
}
}
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