public static bool ValidateHttpHeaders(HttpPacket packet)
{
if (!packet.Headers.ContainsKey(CONTENTTYPE))
{
throw new HttpProtocolException("Mandatory Content-Type header not found.");
}
string contentTypeHeader = packet.Headers[CONTENTTYPE];
string[] contentTypeDefinitions = contentTypeHeader.Split(';');
if (contentTypeDefinitions.Length == 0)
{
throw new HttpProtocolException("Content-Type not defined");
}
else
{
string contentType = contentTypeDefinitions[0];
// todo: remove this?
if (StringComparer.InvariantCultureIgnoreCase.Compare(contentType, APPLICATIONSOAPXML) != 0)
{
//throw new HttpProtocolException(string.Format("Content-Type mismatch; expected: application/soap+xml, actual: {0}", contentType));
}
packet.ContentType = contentType;
for (int i = 1; i < contentTypeDefinitions.Length; i++)
{
string[] parameters = contentTypeDefinitions[i].Trim().Split('=');
if (parameters.Length > 1)
{
if (StringComparer.InvariantCultureIgnoreCase.Compare(parameters[0], "charset") == 0)
{
packet.Encoding = parameters[1].Trim();
if (StringComparer.InvariantCultureIgnoreCase.Compare(packet.Encoding, UTF8) != 0)
{
throw new HttpProtocolException(string.Format("Charset mismatch. Expected: utf-8, actual: {0}", packet.Encoding));
}
}
}
}
}
return(true);
}
public static bool ContinueReading(MemoryStream responseStream, out HttpPacket header)
{
System.Diagnostics.Debug.WriteLine("check if we still have to wait for message.");
MemoryStream streamCopy = new MemoryStream(responseStream.GetBuffer());
StreamReader rdr = new StreamReader(streamCopy);
header = new HttpPacket();
int contentLength = 0;
int bodyOffset = 0;
bool bFound = false;
bool bFirst = true;
bool noBodySupposed = false;
while (!rdr.EndOfStream)
{
string nextLine = rdr.ReadLine();
System.Diagnostics.Debug.WriteLine(nextLine);
bodyOffset += (2 + nextLine.Length);
if (nextLine == null)
{
System.Diagnostics.Debug.WriteLine("NULL instead of line");
break;
}
if (bFirst)
{
// Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF
string[] statusParts = nextLine.Split(' ');
if (statusParts.Length > 2)
{
string code = statusParts[1].Trim();
header.HttpVersion = statusParts[0];
header.StatusCode = int.Parse(code);
header.StatusDescription = statusParts[2];
if (code == "204" || code == "304" || code.StartsWith("1"))
{
System.Diagnostics.Debug.WriteLine("No body supposed");
noBodySupposed = true;
}
}
else
{
throw new HttpProtocolException(string.Format("The first line of a Response message is incorrect: {0}", nextLine));
}
bFirst = false;
}
else
{
// header: header-field = field-name ":" OWS [ field-value ] OWS
// field-name = token
// field-value = *( field-content / OWS )
// field-content = *( WSP / VCHAR / obs-text )
int colonPos = nextLine.IndexOf(':');
if (colonPos > 0)
{
string headerName = nextLine.Substring(0, colonPos).Trim();
string headerValue = nextLine.Substring(colonPos + 1).Trim();
header.Headers.Add(headerName, headerValue);
if (StringComparer.InvariantCultureIgnoreCase.Compare(headerName, CONTENTLENGTH) == 0)
{
System.Diagnostics.Debug.WriteLine(string.Format("Content-Length found: {0}", headerValue));
if (!int.TryParse(headerValue, out contentLength))
{
throw new HttpProtocolException(string.Format("Content-Length incorrect: {0}, integer expected", headerValue));
}
header.ContentLength = contentLength;
}
}
else
{
if (string.IsNullOrEmpty(nextLine))
{
System.Diagnostics.Debug.WriteLine("Empty line - end of headers");
bFound = true;
break;
}
else
{
throw new HttpProtocolException(string.Format("Unexpected header format: {0}", nextLine));
}
}
}
}
header.BodyOffset = bodyOffset;
// empty line found - body can be checked
if (bFound)
{
// message must not have a body;
if (noBodySupposed)
{
System.Diagnostics.Debug.WriteLine("Stop read");
return(false);
}
else
{
if (contentLength <= responseStream.Length - bodyOffset)
{
System.Diagnostics.Debug.WriteLine("Content length OK - stop read");
return(false);
}
else
{
System.Diagnostics.Debug.WriteLine("Content length NOT OK, continue reading");
}
}
}
return(true);
}
public Message Request(Message message, TimeSpan timeout)
{
Message message3 = null;
// check input parameters
if (message == null)
{
throw new ArgumentNullException("message");
}
if (timeout < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException("timeout");
}
// check if underling stream has not been closed by the server
_networkStream.EnsureOpen();
base.ThrowIfDisposedOrNotOpen();
// clear headers
message.Headers.Clear();
// send message
WriteMessageToStream(message);
// Start reading
// Wait first byte for timeout.TotalMilliseconds
int readTimeout = (int)timeout.TotalMilliseconds;
// initialize variables
MemoryStream responseStream = new MemoryStream();
int bytes = 0;
byte[] responseBuffer = new byte[2048];
bool bContinue = false;
HttpPacket header = null;
// read response
do
{
IAsyncResult result = _networkStream.BeginRead(responseBuffer, 0, responseBuffer.Length);
// wait for bytes receied, stop event or timeout
WaitHandle[] handles;
if (_executionController != null && _executionController.StopEvent != null)
{
handles = new WaitHandle[] { result.AsyncWaitHandle, _executionController.StopEvent };
}
else
{
handles = new WaitHandle[] { result.AsyncWaitHandle };
}
int handle = System.Threading.WaitHandle.WaitAny(handles, readTimeout);
if (handle == WaitHandle.WaitTimeout)
{
_networkStream.Close(true);
throw new IOException("The HTTP request has exceeded the allotted timeout");
}
if (handle == 1)
{
System.Diagnostics.Debug.WriteLine("Stop event");
throw new StopEventException("Stop waiting for the answer");
}
bytes = _networkStream.EndRead(result);
responseStream.Write(responseBuffer, 0, bytes);
// timeout for next part of answer
readTimeout = READTIMEOUT;
// parse response received by this moment.
try
{
bContinue = HttpHelper.ContinueReading(responseStream, out header);
}
catch (Exception exc)
{
// clean resources somehow ?
throw new Exception("An error occurred while parsing HTTP packet", exc);
}
}while (_networkStream.DataAvailable || bContinue);
int count = (int)responseStream.Length - header.BodyOffset;
if (header.ContentLength < count)
{
throw new HttpProtocolException(
string.Format("An error occurred while receiving packet. Expected length: {0}, received: {1}",
header.ContentLength, count));
}
// validate headers
HttpHelper.ValidateHttpHeaders(header);
// check if connection is to be closed
if (header.Headers.ContainsKey("Connection"))
{
string connState = header.Headers["Connection"];
if (connState.ToLower() == "close")
{
_networkStream.Close(true);
}
}
// parse response
string response = Encoding.UTF8.GetString(responseStream.GetBuffer());
foreach (ITrafficListener listener in _listeners)
{
listener.LogResponse(response);
}
int start = header.BodyOffset;
if (start >= 0)
{
byte[] buffer = bufferManager.TakeBuffer(count);
Array.Copy(responseStream.GetBuffer(), start, buffer, 0, count);
message3 = _encoder.ReadMessage(new ArraySegment <byte>(buffer, 0, count), bufferManager);
bufferManager.ReturnBuffer(buffer);
if (message3.IsFault)
{
Console.WriteLine("FAULT");
ThrowFaultException(message3);
}
}
else
{
throw new ProtocolException(string.Format("The server returned unexpected reply: {0} {1}", header.StatusCode, header.StatusDescription));
}
return(message3);
}
