private ProxyToken HandleOtherRequest(HttpRequestHeader header, DataAdapterToStream stm, TcpClientDataAdapter tcpAdapter)
{
string host = null;
foreach (KeyDataPair<string> pair in header.Headers)
{
if (pair.Name.Equals("host", StringComparison.OrdinalIgnoreCase))
{
host = pair.Value;
}
}
Uri url = GetUri(host, tcpAdapter);
if (url != null)
{
// Use generic token so filters don't get used
IpProxyToken ret = new IpProxyToken(null, url.Host, url.Port, IpProxyToken.IpClientType.Tcp, false);
if(_config.SslConfig.Enabled)
{
ret.Layers = new INetworkLayer[1];
ret.Layers[0] = new SslNetworkLayer(new SslNetworkLayerConfig(false, true) { Enabled = true });
}
ret.State.Add("url", url);
ret.State.Add("stm", stm);
ret.State.Add("header", header);
return ret;
}
else
{
_logger.LogError(CANAPE.Net.Properties.Resources.HttpProxyServer_InvalidUrl, header.Path);
ReturnResponse(null, 400, "Bad Request", header.Method, header.Version, stm);
return null;
}
}
private void ReturnResponse(HttpRequestHeader request, int responseCode, string message, string method, HttpVersion version, DataAdapterToStream stm)
{
ReturnResponse(request, responseCode, message, method, version, new KeyDataPair<string>[0], stm);
}
internal HttpRequestDataChunk(HttpRequestHeader header)
: base(header.Headers, header.Version)
{
Method = header.Method;
Path = header.Path;
}
private void FlushRequest(HttpRequestHeader request)
{
if (!request.IsConnect)
{
HttpParserConfig config = new HttpParserConfig();
config.StreamBody = true;
IEnumerator<HttpRequestDataChunk> e = request.ReadChunks(config).GetEnumerator();
while (e.MoveNext())
{
}
}
}
/// <summary>
///
/// </summary>
/// <param name="request"></param>
/// <param name="response"></param>
/// <returns></returns>
public bool IsMatch(HttpRequestHeader request, HttpResponseHeader response)
{
if (IsMatch(request))
{
foreach (KeyDataPair<string> pair in response.Headers)
{
if(pair.Name.Equals("Content-Type", StringComparison.OrdinalIgnoreCase))
{
return ContentTypeMatch.IsMatch(pair.Value);
}
}
}
return false;
}
private HttpParserConfig CreateConfig(HttpRequestHeader header)
{
HttpParserConfig config = new HttpParserConfig();
HttpLayerConfigEntry entry = _layer._config.GetEntry(header);
config.StreamBody = entry.RequestStreamBody;
config.StreamChunkSize = _layer._config.RequestStreamChunkSize;
config.StrictParsing = _layer._config.RequestStrictParsing;
if (_layer._config.BufferedRequestMaxLength != 0 && (header.ContentLength > _layer._config.BufferedRequestMaxLength))
{
config.StreamBody = true;
}
return config;
}
public HttpProxyServerAdapter(FullHttpProxyServer server, DataAdapterToStream stm, HttpRequestHeader initialRequest, Logger logger)
{
_server = server;
_stm = stm;
_writer = new DataWriter(_stm);
_request = initialRequest;
ProcessProxyRequestHeaders(_request);
_config = new HttpParserConfig();
_config.StreamBody = true;
_logger = logger;
_requestQueue = new Queue<HttpRequestHeader>();
_requestQueue.Enqueue(_request);
Description = stm.Description;
}
public override DataFrame Read()
{
try
{
if (_request == null)
{
_request = HttpParser.ReadRequestHeader(new DataReader(_stm), false, _logger);
}
if (_chunks == null)
{
_chunks = _request.ReadChunks(_config).GetEnumerator();
// If we can't move to the first chunk (headers) there is a serious issue
if (!_chunks.MoveNext())
{
throw new EndOfStreamException();
}
}
HttpRequestDataChunk chunk = _chunks.Current;
if (!_chunks.MoveNext())
{
_request = null;
_chunks = null;
}
MemoryStream stm = new MemoryStream();
DataWriter writer = new DataWriter(stm);
chunk.WriteChunk(writer);
return new DataFrame(stm.ToArray());
}
catch (EndOfStreamException)
{
return null;
}
}
private bool MustCloseConnection(HttpRequestHeader request)
{
return request.Version.IsVersion10
|| request.Version.IsVersionUnknown
|| _config.Version10Proxy
|| request.Headers.HasHeader("Connection", "close")
|| request.Headers.HasHeader("Proxy-Connection", "close");
}
private bool ProcessProxyAuth(HttpRequestHeader request)
{
bool ret = false;
if (_config.RequireAuth)
{
if (request.Headers.HasHeader("Proxy-Authorization"))
{
string[] values = request.Headers.GetHeaderValues("Proxy-Authorization").First().Split(new char[] { ' ' }, 2);
if (values.Length == 2)
{
if (values[0].Equals("Basic", StringComparison.OrdinalIgnoreCase))
{
try
{
string data = BinaryEncoding.Instance.GetString(Convert.FromBase64String(values[1]));
string[] vs = data.Split(new char[] { ':' }, 2);
if ((vs.Length == 0) || (String.IsNullOrWhiteSpace(vs[0])))
{
_logger.LogError(Properties.Resources.FullHttpProxyServer_InvalidUsernamePasswordString);
}
else
{
// Username case-insensitive, password case sensitive
ret = vs[0].Equals(_config.ProxyUsername, StringComparison.OrdinalIgnoreCase)
&& _config.ProxyPassword.Equals(vs.Length > 1 ? vs[1] : String.Empty);
}
}
catch (FormatException)
{
_logger.LogError(Properties.Resources.FullHttpProxyServer_InvalidBase64Auth);
}
}
else
{
_logger.LogError(Properties.Resources.FullHttpProxyServer_OnlySupportBasicAuth);
}
}
else
{
_logger.LogError(Properties.Resources.FullHttpProxyServer_InvalidAuthLine);
}
}
}
else
{
ret = true;
}
return ret;
}
private bool HandleProxyAuthentication(DataReader reader, DataAdapterToStream stm, ref HttpRequestHeader request)
{
if (_config.RequireAuth)
{
bool auth = ProcessProxyAuth(request);
if (!auth)
{
ReturnResponse(request, 407, "Proxy Authentication Required", request.Method, request.Version,
new KeyDataPair<string>[] { new KeyDataPair<string>("Proxy-Authenticate",
String.Format("Basic realm=\"{0}\"", _config.AuthRealm ?? "canape.local")) }, stm);
if (!MustCloseConnection(request))
{
// If version 1.1 server we can assume connection will probably stay up so re-read request
// Only give it one chance to get it right though
request = HttpParser.ReadRequestHeader(reader, false, _logger);
auth = ProcessProxyAuth(request);
}
}
return auth;
}
else
{
return true;
}
}
private ProxyToken HandleOtherRequest(HttpRequestHeader header, DataAdapterToStream stm, ProxyNetworkService service)
{
Uri url;
if (Uri.TryCreate(header.Path, UriKind.Absolute, out url))
{
// Use generic token so filters don't get used
ProxyToken ret = new ProxyToken();
ret.State.Add("url", url);
ret.State.Add("stm", stm);
ret.State.Add("header", header);
ret.Client = new HttpProxyDummyClient(this, service);
ret.Graph = _factory;
return ret;
}
else
{
_logger.LogError(CANAPE.Net.Properties.Resources.HttpProxyServer_InvalidUrl, header.Path);
// TODO: Put in some decent error codes
ReturnResponse(null, 400, "Bad Request", header.Method, header.Version, stm);
return null;
}
}
private IpProxyToken HandleConnect(HttpRequestHeader header, DataAdapterToStream stm)
{
string hostName = null;
int port = 80;
string[] connectHeader = header.Path.Split(':');
IpProxyToken ret = null;
if (connectHeader.Length > 0)
{
hostName = connectHeader[0];
if (connectHeader.Length > 1)
{
if (!int.TryParse(connectHeader[1], out port))
{
_logger.LogError(CANAPE.Net.Properties.Resources.HttpProxyServer_InvalidConnect, connectHeader[1]);
port = 0;
}
}
if (port > 0)
{
ret = new IpProxyToken(null, hostName, port, IpProxyToken.IpClientType.Tcp, false);
ret.State.Add("stm", stm);
ret.State.Add("header", header);
}
else
{
ReturnResponse(null, 400, "Bad Request", header.Method, header.Version, stm);
}
}
return ret;
}
private void ReturnResponse(HttpRequestHeader request, int responseCode, string message, string method, HttpVersion version, IEnumerable<KeyDataPair<string>> sendHeaders, DataAdapterToStream stm)
{
if (request != null)
{
FlushRequest(request);
}
HttpResponseDataChunk response = new HttpResponseDataChunk();
if (_config.Version10Proxy && !version.IsVersionUnknown)
{
response.Version = HttpVersion.Version10;
}
else
{
response.Version = version;
}
response.ResponseCode = responseCode;
response.Message = message;
response.FinalChunk = true;
response.Body = new byte[0];
List<KeyDataPair<string>> headers = new List<KeyDataPair<string>>(sendHeaders);
headers.Add(new KeyDataPair<string>("X-Proxy-Server", "CANAPE"));
if (response.Body.Length > 0)
{
headers.Add(new KeyDataPair<string>("Content-Type", "text/html"));
}
response.Headers = headers.ToArray();
if (method.Equals("HEAD", StringComparison.OrdinalIgnoreCase))
{
response.HeadResponse = true;
}
else if (method.Equals("CONNECT", StringComparison.OrdinalIgnoreCase))
{
response.ConnectResponse = true;
}
response.WriteChunk(new DataWriter(stm));
}
public override DataFrame Read()
{
try
{
if(_request == null)
{
_request = HttpParser.ReadRequestHeader(new DataReader(_stm), false, _logger);
lock (_requestQueue)
{
_requestQueue.Enqueue(_request);
}
ProcessProxyRequestHeaders(_request);
}
if (_chunks == null)
{
_chunks = _request.ReadChunks(_config).GetEnumerator();
// If we can't move to the first chunk (headers) there is a serious issue
if (!_chunks.MoveNext())
{
throw new EndOfStreamException();
}
}
HttpRequestDataChunk chunk = _chunks.Current;
if (!_chunks.MoveNext())
{
_request = null;
_chunks = null;
}
DataKey root = new DataKey("Root");
root.AddValue(new DynamicDataValue(DATA_NAME, chunk));
return new DataFrame(root);
}
catch (EndOfStreamException)
{
return null;
}
}
public HttpProxyServerAdapter(DataAdapterToStream stm, HttpRequestHeader initialRequest, Logger logger)
{
_stm = stm;
_writer = new DataWriter(_stm);
_request = initialRequest;
_config = new HttpParserConfig();
_config.StreamBody = true;
_logger = logger;
Description = stm.Description;
}
private void ProcessProxyRequestHeaders(HttpRequestHeader request)
{
int i = 0;
// If we have a request for a client version which will close then ensure the job is done
if (request.Version.IsVersionUnknown || request.Version.IsVersion10 || _server._config.Version10Proxy)
{
_closeConnection = true;
}
while(i < request.Headers.Count)
{
KeyDataPair<string> pair = request.Headers[i];
// Just remove, we already have handled this
if (pair.Name.Equals("Proxy-Authorization", StringComparison.OrdinalIgnoreCase))
{
request.Headers.RemoveAt(i);
}
else if (pair.Name.Equals("Connection", StringComparison.OrdinalIgnoreCase)
|| pair.Name.Equals("Proxy-Connection", StringComparison.OrdinalIgnoreCase))
{
// If sender wants the connection close then signal it for next response
if (pair.Value.Equals("close", StringComparison.OrdinalIgnoreCase))
{
_closeConnection = true;
}
request.Headers.RemoveAt(i);
}
else
{
++i;
}
}
}
/// <summary>
/// Does this entry match the request
/// </summary>
/// <param name="request">The request</param>
/// <returns>True if it matches</returns>
public bool IsMatch(HttpRequestHeader request)
{
bool ret = true;
if (request != null)
{
if (!PathMatch.IsMatch(request.Path))
{
ret = false;
}
if (MethodMatch.IsMatch(request.Method))
{
ret = false;
}
}
return ret;
}
/// <summary>
///
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public HttpLayerConfigEntry GetEntry(HttpRequestHeader request)
{
return GetEntry(e => e.IsMatch(request));
}
public override DataFrame Read()
{
DataFrame frame = null;
try
{
if (_chunks == null || !_chunks.MoveNext())
{
char firstChar = _reader.ReadChar();
// Check whether we need to upgrade the connection to raw data, could even at this point actually implement
// TLS upgrade (and put back the HTTP parser on top?)
if (_isTransparent)
{
// If transparent send the first chunk along and don't increment enumerator
_chunks = BaseHttpDataAdapter.ReadFrames(new DataFrame(new byte[] { (byte)firstChar }), _reader).GetEnumerator();
}
else
{
_currentHeader = HttpParser.ReadRequestHeader(_reader, _layer._config.RequestStrictParsing, _logger, new char[] { firstChar });
if (_currentHeader.Version.IsVersion11 && _layer._config.Handle100Continue)
{
bool sendResponse = false;
int i = 0;
while(i < _currentHeader.Headers.Count)
{
KeyDataPair<string> header = _currentHeader.Headers[i];
// Remove expect headers
if (header.Name.Equals("Expect", StringComparison.OrdinalIgnoreCase) && header.Value.Equals("100-continue", StringComparison.OrdinalIgnoreCase))
{
_currentHeader.Headers.RemoveAt(i);
sendResponse = true;
}
else
{
i++;
}
}
if (sendResponse)
{
_adapter.Write(new DataFrame("HTTP/1.1 100 Continue\r\n\r\n"));
}
}
_chunks = _currentHeader.ReadFrames(CreateConfig(_currentHeader)).GetEnumerator();
}
// Increment to next chunk
if (!_chunks.MoveNext())
{
throw new EndOfStreamException();
}
}
frame = _chunks.Current;
}
catch(EndOfStreamException)
{
frame = null;
}
return frame;
}
/// <summary>
///
/// </summary>
/// <param name="request"></param>
/// <param name="response"></param>
/// <returns></returns>
public HttpLayerConfigEntry GetEntry(HttpRequestHeader request, HttpResponseHeader response)
{
return GetEntry(e => e.IsMatch(request, response));
}
private HttpParserConfig CreateConfig(HttpResponseHeader response, HttpRequestHeader request)
{
HttpParserConfig config = new HttpParserConfig();
HttpLayerConfigEntry entry = _layer._config.GetEntry(request, response);
config.ConvertToChunked = entry.ConvertToChunked;
config.StreamBody = entry.ResponseStreamBody;
config.StreamChunkSize = _layer._config.ResponseStreamChunkSize;
config.StrictParsing = _layer._config.ResponseStrictParsing;
if (_layer._config.BufferedResponseMaxLength != 0 && (response.ContentLength > _layer._config.BufferedResponseMaxLength))
{
config.StreamBody = true;
}
return config;
}
internal HttpRequestDataChunk(HttpRequestHeader header)
: base(header.Headers, header.Version)
{
Method = header.Method;
Path = header.Path;
}