private TransactionNode ExtractHttpData(PacketStream stream, HTTPTransactionType type, string nodeName)
{
if (nodeName == null)
{
nodeName = (type == HTTPTransactionType.REQUEST) ? "Request" : "Response";
}
TransactionNode node = new TransactionNode(nodeName);
List<PacketSlice> slices = new List<PacketSlice>();
string line = stream.PeekLineUTF8();
int fieldCount = (type == HTTPTransactionType.REQUEST) ? 3 : 2;
string[] tokens = line.Split(new char[] { ' ' }, fieldCount);
if (tokens.Length < fieldCount)
throw new ProtocolError();
if (type == HTTPTransactionType.REQUEST)
{
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[0]), slices);
node.AddField("Verb", tokens[0], "Request verb.", slices);
stream.ReadByte();
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[1]), slices);
node.AddField("Argument", tokens[1], "Request argument.", slices);
stream.ReadByte();
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[2]), slices);
node.AddField("Protocol", tokens[2], "Protocol identifier.", slices);
// Set a description
node.Description = String.Format("{0} {1}", tokens[0], tokens[1]);
if (node.Description.Length > MAX_DESCRIPTION_LENGTH)
{
node.Description = node.Description.Substring(0, MAX_DESCRIPTION_LENGTH - ellipsis.Length);
node.Description += ellipsis;
}
}
else
{
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[0]), slices);
node.AddField("Protocol", tokens[0], "Protocol identifier.", slices);
if (tokens.Length > 1)
{
stream.ReadByte();
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(tokens[1]), slices);
node.AddField("Result", tokens[1], "Result.", slices);
}
// Set a description
string result = tokens[1];
if (result.Length > MAX_DESCRIPTION_LENGTH)
{
result = result.Substring(0, MAX_DESCRIPTION_LENGTH - ellipsis.Length) + ellipsis;
}
node.Description = result;
}
stream.ReadBytes(2);
TransactionNode headersNode = new TransactionNode("Headers");
Dictionary<string, string> headerFields = new Dictionary<string, string>();
do
{
line = stream.PeekLineUTF8();
if (line.Length > 0)
{
tokens = line.Split(new char[] { ':' }, 2);
if (tokens.Length < 2)
throw new ProtocolError();
string key = tokens[0];
string value = tokens[1].TrimStart();
stream.ReadBytes(StaticUtils.GetUTF8ByteCount(line), slices);
headersNode.AddField(key, value, "Header field.", slices);
headerFields[key.ToLower()] = value;
}
stream.ReadBytes(2);
} while (line != "");
if (headersNode.Fields.Count > 0)
{
node.AddChild(headersNode);
}
int contentLen = -1;
if (headerFields.ContainsKey("content-length"))
contentLen = Convert.ToInt32(headerFields["content-length"]);
else if (headerFields.ContainsKey("contentlength"))
contentLen = Convert.ToInt32(headerFields["contentlength"]);
if (contentLen != -1)
{
string contentType = null, contentEncoding = null;
if (headerFields.ContainsKey("content-type"))
contentType = headerFields["content-type"];
else if (headerFields.ContainsKey("contenttype"))
contentType = headerFields["contenttype"];
if (contentType != null)
{
contentType = contentType.ToLower();
tokens = contentType.Split(new char[] { ';' });
contentType = tokens[0].Trim();
if (tokens.Length > 1)
{
string[] encTokens = tokens[1].Split(new char[] { '=' }, 2);
if (encTokens[0].Trim() == "charset" && encTokens.Length > 1)
{
contentEncoding = encTokens[1];
}
}
}
string str = stream.PeekStringASCII(5);
if (str == "<?xml")
{
contentType = "text/xml";
contentEncoding = "utf-8"; // FIXME
}
if (contentLen > 0)
{
AddBodyNode(stream, node, contentType, contentEncoding, contentLen);
}
}
return node;
}
