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//------------------------------------------------------------------------------
// <copyright file="HttpClientProtocol.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.Services.Protocols {
using System;
using System.Collections;
using System.IO;
using System.Reflection;
using System.Xml.Serialization;
using System.Net;
using System.Text;
using System.Threading;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Web.Services.Diagnostics;
internal class HttpClientMethod {
internal Type readerType;
internal object readerInitializer;
internal Type writerType;
internal object writerInitializer;
internal LogicalMethodInfo methodInfo;
}
internal class HttpClientType {
Hashtable methods = new Hashtable();
internal HttpClientType(Type type) {
LogicalMethodInfo[] methodInfos = LogicalMethodInfo.Create(type.GetMethods(), LogicalMethodTypes.Sync);
Hashtable formatterTypes = new Hashtable();
for (int i = 0; i < methodInfos.Length; i++) {
LogicalMethodInfo methodInfo = methodInfos[i];
try {
object[] attributes = methodInfo.GetCustomAttributes(typeof(HttpMethodAttribute));
if (attributes.Length == 0) continue;
HttpMethodAttribute attribute = (HttpMethodAttribute)attributes[0];
HttpClientMethod method = new HttpClientMethod();
method.readerType = attribute.ReturnFormatter;
method.writerType = attribute.ParameterFormatter;
method.methodInfo = methodInfo;
AddFormatter(formatterTypes, method.readerType, method);
AddFormatter(formatterTypes, method.writerType, method);
methods.Add(methodInfo.Name, method);
}
catch (Exception e) {
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException) {
throw;
}
throw new InvalidOperationException(Res.GetString(Res.WebReflectionError, methodInfo.DeclaringType.FullName, methodInfo.Name), e);
}
}
foreach (Type t in formatterTypes.Keys) {
ArrayList list = (ArrayList)formatterTypes[t];
LogicalMethodInfo[] m = new LogicalMethodInfo[list.Count];
for (int j = 0; j < list.Count; j++)
m[j] = ((HttpClientMethod)list[j]).methodInfo;
object[] initializers = MimeFormatter.GetInitializers(t, m);
bool isWriter = typeof(MimeParameterWriter).IsAssignableFrom(t);
for (int j = 0; j < list.Count; j++) {
if (isWriter) {
((HttpClientMethod)list[j]).writerInitializer = initializers[j];
}
else {
((HttpClientMethod)list[j]).readerInitializer = initializers[j];
}
}
}
}
static void AddFormatter(Hashtable formatterTypes, Type formatterType, HttpClientMethod method) {
if (formatterType == null) return;
ArrayList list = (ArrayList)formatterTypes[formatterType];
if (list == null) {
list = new ArrayList();
formatterTypes.Add(formatterType, list);
}
list.Add(method);
}
internal HttpClientMethod GetMethod(string name) {
return (HttpClientMethod)methods[name];
}
}
/// <include file='doc\HttpClientProtocol.uex' path='docs/doc[@for="HttpSimpleClientProtocol"]/*' />
/// <devdoc>
/// <para>
/// Specifies
/// most of the implementation for communicating with an HTTP web service over HTTP.
/// </para>
/// </devdoc>
[ComVisible(true)]
public abstract class HttpSimpleClientProtocol : HttpWebClientProtocol {
HttpClientType clientType;
/// <include file='doc\HttpClientProtocol.uex' path='docs/doc[@for="HttpSimpleClientProtocol.HttpSimpleClientProtocol"]/*' />
/// <devdoc>
/// <para>
/// Initializes a new instance of the <see cref='System.Web.Services.Protocols.HttpSimpleClientProtocol'/> class.
/// </para>
/// </devdoc>
protected HttpSimpleClientProtocol()
: base() {
Type type = this.GetType();
clientType = (HttpClientType)GetFromCache(type);
if (clientType == null) {
lock (InternalSyncObject) {
clientType = (HttpClientType)GetFromCache(type);
if (clientType == null) {
clientType = new HttpClientType(type);
AddToCache(type, clientType);
}
}
}
}
/// <include file='doc\HttpClientProtocol.uex' path='docs/doc[@for="HttpSimpleClientProtocol.Invoke"]/*' />
/// <devdoc>
/// <para>
/// Invokes a method of a HTTP web service.
/// </para>
/// </devdoc>
protected object Invoke(string methodName, string requestUrl, object[] parameters) {
WebResponse response = null;
HttpClientMethod method = GetClientMethod(methodName);
MimeParameterWriter paramWriter = GetParameterWriter(method);
Uri requestUri = new Uri(requestUrl);
if (paramWriter != null) {
paramWriter.RequestEncoding = RequestEncoding;
requestUrl = paramWriter.GetRequestUrl(requestUri.AbsoluteUri, parameters);
requestUri = new Uri(requestUrl, true);
}
WebRequest request = null;
try {
request = GetWebRequest(requestUri);
NotifyClientCallOut(request);
PendingSyncRequest = request;
if (paramWriter != null) {
paramWriter.InitializeRequest(request, parameters);
//
if (paramWriter.UsesWriteRequest) {
if (parameters.Length == 0)
request.ContentLength = 0;
else {
Stream requestStream = null;
try {
requestStream = request.GetRequestStream();
paramWriter.WriteRequest(requestStream, parameters);
}
finally {
if (requestStream != null) requestStream.Close();
}
}
}
}
response = GetWebResponse(request);
Stream responseStream = null;
if (response.ContentLength != 0)
responseStream = response.GetResponseStream();
return ReadResponse(method, response, responseStream);
}
finally {
if (request == PendingSyncRequest)
PendingSyncRequest = null;
}
}
/// <include file='doc\HttpClientProtocol.uex' path='docs/doc[@for="HttpSimpleClientProtocol.BeginInvoke"]/*' />
/// <devdoc>
/// <para>
/// Starts an asynchronous invocation of a method of a HTTP web service.
/// </para>
/// </devdoc>
protected IAsyncResult BeginInvoke(string methodName, string requestUrl, object[] parameters, AsyncCallback callback, object asyncState) {
HttpClientMethod method = GetClientMethod(methodName);
MimeParameterWriter paramWriter = GetParameterWriter(method);
Uri requestUri = new Uri(requestUrl);
if (paramWriter != null) {
paramWriter.RequestEncoding = RequestEncoding;
requestUrl = paramWriter.GetRequestUrl(requestUri.AbsoluteUri, parameters);
requestUri = new Uri(requestUrl, true);
}
InvokeAsyncState invokeState = new InvokeAsyncState(method, paramWriter, parameters);
WebClientAsyncResult asyncResult = new WebClientAsyncResult(this, invokeState, null, callback, asyncState);
return BeginSend(requestUri, asyncResult, paramWriter.UsesWriteRequest);
}
/// <include file='doc\HttpClientProtocol.uex' path='docs/doc[@for="HttpSimpleClientProtocol.InitializeAsyncRequest"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
internal override void InitializeAsyncRequest(WebRequest request, object internalAsyncState) {
InvokeAsyncState invokeState = (InvokeAsyncState)internalAsyncState;
if (invokeState.ParamWriter.UsesWriteRequest && invokeState.Parameters.Length == 0)
request.ContentLength = 0;
}
internal override void AsyncBufferedSerialize(WebRequest request, Stream requestStream, object internalAsyncState) {
InvokeAsyncState invokeState = (InvokeAsyncState)internalAsyncState;
if (invokeState.ParamWriter != null) {
invokeState.ParamWriter.InitializeRequest(request, invokeState.Parameters);
if (invokeState.ParamWriter.UsesWriteRequest && invokeState.Parameters.Length > 0)
invokeState.ParamWriter.WriteRequest(requestStream, invokeState.Parameters);
}
}
class InvokeAsyncState {
internal object[] Parameters;
internal MimeParameterWriter ParamWriter;
internal HttpClientMethod Method;
internal InvokeAsyncState(HttpClientMethod method, MimeParameterWriter paramWriter, object[] parameters) {
this.Method = method;
this.ParamWriter = paramWriter;
this.Parameters = parameters;
}
}
/// <include file='doc\HttpClientProtocol.uex' path='docs/doc[@for="HttpSimpleClientProtocol.EndInvoke"]/*' />
/// <devdoc>
/// <para>
/// Ends an asynchronous invocation of a method of a HTTP web service.
/// </para>
/// </devdoc>
protected object EndInvoke(IAsyncResult asyncResult) {
object o = null;
Stream responseStream = null;
WebResponse response = EndSend(asyncResult, ref o, ref responseStream);
InvokeAsyncState invokeState = (InvokeAsyncState) o;
return ReadResponse(invokeState.Method, response, responseStream);
}
private void InvokeAsyncCallback(IAsyncResult result) {
object parameter = null;
Exception exception = null;
WebClientAsyncResult asyncResult = (WebClientAsyncResult)result;
if (asyncResult.Request != null) {
try {
object o = null;
Stream responseStream = null;
WebResponse response = EndSend(asyncResult, ref o, ref responseStream);
InvokeAsyncState invokeState = (InvokeAsyncState) o;
parameter = ReadResponse(invokeState.Method, response, responseStream);
}
catch (Exception e) {
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException)
throw;
exception = e;
if (Tracing.On) Tracing.ExceptionCatch(TraceEventType.Error, this, "InvokeAsyncCallback", e);
}
}
AsyncOperation asyncOp = (AsyncOperation)result.AsyncState;
UserToken token = (UserToken)asyncOp.UserSuppliedState;
OperationCompleted(token.UserState, new object[] { parameter }, exception, false);
}
/// <include file='doc\HttpClientProtocol.uex' path='docs/doc[@for="HttpSimpleClientProtocol.InvokeAsync"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected void InvokeAsync(string methodName, string requestUrl, object[] parameters, SendOrPostCallback callback) {
InvokeAsync(methodName, requestUrl, parameters, callback, null);
}
/// <include file='doc\HttpClientProtocol.uex' path='docs/doc[@for="HttpSimpleClientProtocol.InvokeAsync1"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected void InvokeAsync(string methodName, string requestUrl, object[] parameters, SendOrPostCallback callback, object userState) {
if (userState == null)
userState = NullToken;
AsyncOperation asyncOp = AsyncOperationManager.CreateOperation(new UserToken(callback, userState));
WebClientAsyncResult asyncResult = new WebClientAsyncResult(this, null, null, new AsyncCallback(InvokeAsyncCallback), asyncOp);
try {
AsyncInvokes.Add(userState, asyncResult);
}
catch (Exception e) {
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException)
throw;
if (Tracing.On) Tracing.ExceptionCatch(TraceEventType.Error, this, "InvokeAsync", e);
Exception exception = new ArgumentException(Res.GetString(Res.AsyncDuplicateUserState), e);
InvokeCompletedEventArgs eventArgs = new InvokeCompletedEventArgs(new object[] { null }, exception, false, userState);
asyncOp.PostOperationCompleted(callback, eventArgs);
return;
}
try {
HttpClientMethod method = GetClientMethod(methodName);
MimeParameterWriter paramWriter = GetParameterWriter(method);
Uri requestUri = new Uri(requestUrl);
if (paramWriter != null) {
paramWriter.RequestEncoding = RequestEncoding;
requestUrl = paramWriter.GetRequestUrl(requestUri.AbsoluteUri, parameters);
requestUri = new Uri(requestUrl, true);
}
asyncResult.InternalAsyncState = new InvokeAsyncState(method, paramWriter, parameters);
BeginSend(requestUri, asyncResult, paramWriter.UsesWriteRequest);
}
catch (Exception e) {
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException)
throw;
if (Tracing.On) Tracing.ExceptionCatch(TraceEventType.Error, this, "InvokeAsync", e);
OperationCompleted(userState, new object[] { null }, e, false);
}
}
MimeParameterWriter GetParameterWriter(HttpClientMethod method) {
if (method.writerType == null)
return null;
return (MimeParameterWriter)MimeFormatter.CreateInstance(method.writerType, method.writerInitializer);
}
HttpClientMethod GetClientMethod(string methodName) {
HttpClientMethod method = clientType.GetMethod(methodName);
if (method == null) throw new ArgumentException(Res.GetString(Res.WebInvalidMethodName, methodName), "methodName");
return method;
}
object ReadResponse(HttpClientMethod method, WebResponse response, Stream responseStream) {
HttpWebResponse httpResponse = response as HttpWebResponse;
if (httpResponse != null && (int)httpResponse.StatusCode >= 300)
throw new WebException(RequestResponseUtils.CreateResponseExceptionString(httpResponse, responseStream), null,
WebExceptionStatus.ProtocolError, httpResponse);
if (method.readerType == null)
return null;
//
if (responseStream != null) {
MimeReturnReader reader = (MimeReturnReader)MimeFormatter.CreateInstance(method.readerType, method.readerInitializer);
return reader.Read(response, responseStream);
}
else
return null;
}
}
}
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