//Called asynchronously when a request was successfully and we received the response
public async Task HandleHttpSessionResponse(SessionEventArgs args)
{
//read response & headers from server
await args.WebSession.ReceiveResponse();
try
{
if (!args.WebSession.Response.ResponseBodyRead)
{
args.WebSession.Response.ResponseStream = args.WebSession.ServerConnection.Stream;
}
args.ReRequest = false;
//If user requested call back then do it
if (BeforeResponse != null && !args.WebSession.Response.ResponseLocked)
{
Delegate[] invocationList = BeforeResponse.GetInvocationList();
Task[] handlerTasks = new Task[invocationList.Length];
for (int i = 0; i < invocationList.Length; i++)
{
handlerTasks[i] = ((Func <object, SessionEventArgs, Task>)invocationList[i])(this, args);
}
await Task.WhenAll(handlerTasks);
}
if (args.ReRequest)
{
await HandleHttpSessionRequestInternal(null, args, null, null, true).ConfigureAwait(false);
return;
}
args.WebSession.Response.ResponseLocked = true;
//Write back to client 100-conitinue response if that's what server returned
if (args.WebSession.Response.Is100Continue)
{
await WriteResponseStatus(args.WebSession.Response.HttpVersion, "100",
"Continue", args.ProxyClient.ClientStreamWriter);
await args.ProxyClient.ClientStreamWriter.WriteLineAsync();
}
else if (args.WebSession.Response.ExpectationFailed)
{
await WriteResponseStatus(args.WebSession.Response.HttpVersion, "417",
"Expectation Failed", args.ProxyClient.ClientStreamWriter);
await args.ProxyClient.ClientStreamWriter.WriteLineAsync();
}
//Write back response status to client
await WriteResponseStatus(args.WebSession.Response.HttpVersion, args.WebSession.Response.ResponseStatusCode,
args.WebSession.Response.ResponseStatusDescription, args.ProxyClient.ClientStreamWriter);
if (args.WebSession.Response.ResponseBodyRead)
{
var isChunked = args.WebSession.Response.IsChunked;
var contentEncoding = args.WebSession.Response.ContentEncoding;
if (contentEncoding != null)
{
args.WebSession.Response.ResponseBody = await GetCompressedResponseBody(contentEncoding, args.WebSession.Response.ResponseBody);
if (isChunked == false)
{
args.WebSession.Response.ContentLength = args.WebSession.Response.ResponseBody.Length;
}
else
{
args.WebSession.Response.ContentLength = -1;
}
}
await WriteResponseHeaders(args.ProxyClient.ClientStreamWriter, args.WebSession.Response);
await args.ProxyClient.ClientStream.WriteResponseBody(args.WebSession.Response.ResponseBody, isChunked);
}
else
{
await WriteResponseHeaders(args.ProxyClient.ClientStreamWriter, args.WebSession.Response);
//Write body only if response is chunked or content length >0
//Is none are true then check if connection:close header exist, if so write response until server or client terminates the connection
if (args.WebSession.Response.IsChunked || args.WebSession.Response.ContentLength > 0 ||
!args.WebSession.Response.ResponseKeepAlive)
{
await args.WebSession.ServerConnection.StreamReader
.WriteResponseBody(BUFFER_SIZE, args.ProxyClient.ClientStream, args.WebSession.Response.IsChunked,
args.WebSession.Response.ContentLength);
}
//write response if connection:keep-alive header exist and when version is http/1.0
//Because in Http 1.0 server can return a response without content-length (expectation being client would read until end of stream)
else if (args.WebSession.Response.ResponseKeepAlive && args.WebSession.Response.HttpVersion.Minor == 0)
{
await args.WebSession.ServerConnection.StreamReader
.WriteResponseBody(BUFFER_SIZE, args.ProxyClient.ClientStream, args.WebSession.Response.IsChunked,
args.WebSession.Response.ContentLength);
}
}
await args.ProxyClient.ClientStream.FlushAsync();
}
catch
{
Dispose(args.ProxyClient.ClientStream, args.ProxyClient.ClientStreamReader,
args.ProxyClient.ClientStreamWriter, args);
}
finally
{
args.Dispose();
}
}
//Called asynchronously when a request was successfully and we received the response
public static async Task HandleHttpSessionResponse(SessionEventArgs args)
{
await args.WebSession.ReceiveResponse().ConfigureAwait(false);
try
{
if (!args.WebSession.Response.ResponseBodyRead)
{
args.WebSession.Response.ResponseStream = args.WebSession.ServerConnection.Stream;
}
if (BeforeResponse != null && !args.WebSession.Response.ResponseLocked)
{
Delegate[] invocationList = BeforeResponse.GetInvocationList();
Task[] handlerTasks = new Task[invocationList.Length];
for (int i = 0; i < invocationList.Length; i++)
{
handlerTasks[i] = ((Func <object, SessionEventArgs, Task>)invocationList[i])(null, args);
}
await Task.WhenAll(handlerTasks).ConfigureAwait(false);
}
args.WebSession.Response.ResponseLocked = true;
if (args.WebSession.Response.Is100Continue)
{
await WriteResponseStatus(args.WebSession.Response.HttpVersion, "100",
"Continue", args.Client.ClientStreamWriter);
await args.Client.ClientStreamWriter.WriteLineAsync();
}
else if (args.WebSession.Response.ExpectationFailed)
{
await WriteResponseStatus(args.WebSession.Response.HttpVersion, "417",
"Expectation Failed", args.Client.ClientStreamWriter);
await args.Client.ClientStreamWriter.WriteLineAsync();
}
await WriteResponseStatus(args.WebSession.Response.HttpVersion, args.WebSession.Response.ResponseStatusCode,
args.WebSession.Response.ResponseStatusDescription, args.Client.ClientStreamWriter);
if (args.WebSession.Response.ResponseBodyRead)
{
var isChunked = args.WebSession.Response.IsChunked;
var contentEncoding = args.WebSession.Response.ContentEncoding;
if (contentEncoding != null)
{
args.WebSession.Response.ResponseBody = await GetCompressedResponseBody(contentEncoding, args.WebSession.Response.ResponseBody).ConfigureAwait(false);
if (isChunked == false)
{
args.WebSession.Response.ContentLength = args.WebSession.Response.ResponseBody.Length;
}
else
{
args.WebSession.Response.ContentLength = -1;
}
}
await WriteResponseHeaders(args.Client.ClientStreamWriter, args.WebSession.Response.ResponseHeaders).ConfigureAwait(false);
await WriteResponseBody(args.Client.ClientStream, args.WebSession.Response.ResponseBody, isChunked).ConfigureAwait(false);
}
else
{
await WriteResponseHeaders(args.Client.ClientStreamWriter, args.WebSession.Response.ResponseHeaders);
if (args.WebSession.Response.IsChunked || args.WebSession.Response.ContentLength > 0 ||
(args.WebSession.Response.HttpVersion.Major == 1 && args.WebSession.Response.HttpVersion.Minor == 0))
{
await WriteResponseBody(args.WebSession.ServerConnection.StreamReader, args.Client.ClientStream, args.WebSession.Response.IsChunked, args.WebSession.Response.ContentLength).ConfigureAwait(false);
}
}
await args.Client.ClientStream.FlushAsync();
}
catch
{
Dispose(args.Client.TcpClient, args.Client.ClientStream, args.Client.ClientStreamReader, args.Client.ClientStreamWriter, args);
}
finally
{
args.Dispose();
}
}