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// Copyright © 2016 The CefSharp Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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using System.Collections.Specialized;
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using System.IO;
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using System.Net;
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using System.Net.Mime;
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using System.Threading.Tasks;
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namespace CefSharp.Example
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{
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/// <summary>
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/// A simple <see cref="ResourceHandler"/> that uses <see cref="WebRequest.Create(string)"/> to fulfill requests.
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/// </summary>
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/// <remarks>
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/// This example doesn't cover all cases, for example POST requests, if you'd like to see the example
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/// expanded then please subit a Pull Request.
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/// </remarks>
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public class WebRequestResourceHandler : ResourceHandler
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{
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public override CefReturnValue ProcessRequestAsync(IRequest request, ICallback callback)
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{
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//Spawn a Task and immediately return CefReturnValue.ContinueAsync
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Task.Run(async () =>
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{
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using (callback)
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{
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//Create a clone of the headers so we can modify it
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var headers = new NameValueCollection(request.Headers);
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var httpWebRequest = (HttpWebRequest)WebRequest.Create(request.Url);
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httpWebRequest.UserAgent = headers["User-Agent"];
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httpWebRequest.Accept = headers["Accept"];
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httpWebRequest.Method = request.Method;
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httpWebRequest.Referer = request.ReferrerUrl;
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//These headers must be set via the appropriate properties.
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headers.Remove("User-Agent");
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headers.Remove("Accept");
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httpWebRequest.Headers.Add(headers);
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//TODO: Deal with post data
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var postData = request.PostData;
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var httpWebResponse = await httpWebRequest.GetResponseAsync() as HttpWebResponse;
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// Get the stream associated with the response.
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var receiveStream = httpWebResponse.GetResponseStream();
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var contentType = new ContentType(httpWebResponse.ContentType);
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var mimeType = contentType.MediaType;
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var charSet = contentType.CharSet;
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var statusCode = httpWebResponse.StatusCode;
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var memoryStream = new MemoryStream();
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receiveStream.CopyTo(memoryStream);
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receiveStream.Dispose();
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httpWebResponse.Dispose();
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//Reset the stream position to 0 so the stream can be copied into the underlying unmanaged buffer
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memoryStream.Position = 0;
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ResponseLength = memoryStream.Length;
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MimeType = mimeType;
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Charset = charSet ?? "UTF-8";
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StatusCode = (int)statusCode;
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Stream = memoryStream;
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AutoDisposeStream = true;
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callback.Continue();
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}
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});
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return CefReturnValue.ContinueAsync;
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}
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}
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}
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