public static Encoding GetEncoding(this HttpWebSession request)
{
try
{
if (request.Request.ContentType == null)
{
return(Encoding.GetEncoding("ISO-8859-1"));
}
var contentTypes = request.Request.ContentType.Split(';');
foreach (var contentType in contentTypes)
{
var encodingSplit = contentType.Split('=');
if (encodingSplit.Length == 2 && encodingSplit[0].ToLower().Trim() == "charset")
{
return(Encoding.GetEncoding(encodingSplit[1]));
}
}
}
catch
{
// ignored
}
return(Encoding.GetEncoding("ISO-8859-1"));
}
public static Encoding GetResponseEncoding(this HttpWebSession response)
{
if (string.IsNullOrEmpty(response.Response.CharacterSet))
{
return(Encoding.GetEncoding("ISO-8859-1"));
}
return(Encoding.GetEncoding(response.Response.CharacterSet.Replace(@"""", string.Empty)));
}
private static List <HttpHeader> ReadResponseHeaders(HttpWebSession response)
{
for (var i = 0; i < response.Response.ResponseHeaders.Count; i++)
{
switch (response.Response.ResponseHeaders[i].Name.ToLower())
{
case "content-length":
response.Response.ContentLength = int.Parse(response.Response.ResponseHeaders[i].Value.Trim());
break;
case "content-encoding":
response.Response.ContentEncoding = response.Response.ResponseHeaders[i].Value.Trim().ToLower();
break;
case "content-type":
if (response.Response.ResponseHeaders[i].Value.Contains(";"))
{
response.Response.ContentType = response.Response.ResponseHeaders[i].Value.Split(';')[0].Trim();
response.Response.CharacterSet = response.Response.ResponseHeaders[i].Value.Split(';')[1].Substring(9).Trim();
}
else
{
response.Response.ContentType = response.Response.ResponseHeaders[i].Value.ToLower().Trim();
}
break;
case "transfer-encoding":
if (response.Response.ResponseHeaders[i].Value.ToLower().Contains("chunked"))
{
response.Response.IsChunked = true;
}
break;
case "connection":
if (response.Response.ResponseHeaders[i].Value.ToLower().Contains("close"))
{
response.Response.ResponseKeepAlive = false;
}
break;
default:
break;
}
}
return(response.Response.ResponseHeaders);
}
private static void PrepareRequestHeaders(List <HttpHeader> requestHeaders, HttpWebSession webRequest)
{
for (var i = 0; i < requestHeaders.Count; i++)
{
switch (requestHeaders[i].Name.ToLower())
{
case "accept-encoding":
requestHeaders[i].Value = "gzip,deflate,zlib";
break;
default:
break;
}
}
FixRequestProxyHeaders(requestHeaders);
webRequest.Request.RequestHeaders = requestHeaders;
}
/// <summary>
/// Constructor to initialize the proxy
/// </summary>
internal SessionEventArgs()
{
Client = new ProxyClient();
ProxySession = new HttpWebSession();
}
private static void SetRequestHeaders(List <HttpHeader> requestHeaders, HttpWebSession webRequest)
{
for (var i = 0; i < requestHeaders.Count; i++)
{
switch (requestHeaders[i].Name.ToLower())
{
case "accept-encoding":
requestHeaders[i].Value = "gzip,deflate,zlib";
break;
case "connection":
if (requestHeaders[i].Value.ToLower() == "keep-alive")
{
webRequest.Request.KeepAlive = true;
}
break;
case "content-length":
int contentLen;
int.TryParse(requestHeaders[i].Value, out contentLen);
if (contentLen != 0)
{
webRequest.Request.ContentLength = contentLen;
}
break;
case "content-type":
webRequest.Request.ContentType = requestHeaders[i].Value;
break;
case "host":
webRequest.Request.Hostname = requestHeaders[i].Value;
break;
case "proxy-connection":
if (requestHeaders[i].Value.ToLower() == "keep-alive")
{
webRequest.Request.KeepAlive = true;
}
else if (requestHeaders[i].Value.ToLower() == "close")
{
webRequest.Request.KeepAlive = false;
}
break;
case "upgrade":
if (requestHeaders[i].Value.ToLower() == "websocket")
{
webRequest.Request.UpgradeToWebSocket = true;
}
break;
//revisit this, transfer-encoding is not a request header according to spec
//But how to identify if client is sending chunked body for PUT/POST?
case "transfer-encoding":
if (requestHeaders[i].Value.ToLower().Contains("chunked"))
{
webRequest.Request.SendChunked = true;
}
else
{
webRequest.Request.SendChunked = false;
}
break;
default:
break;
}
}
FixRequestProxyHeaders(requestHeaders);
webRequest.Request.RequestHeaders = requestHeaders;
}
internal SessionEventArgs(int bufferSize)
{
_bufferSize = bufferSize;
Client = new Client();
ProxySession = new HttpWebSession();
}
