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Copy pathVSCodeDebugProtocol.cs
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212 lines (174 loc) · 5.57 KB
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// Original work by:
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
// Modified by:
/*---------------------------------------------------------------------------------------------
* Copyright (c) NEXON Korea Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
using System;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
using Newtonsoft.Json;
namespace VSCodeDebug
{
public class VSCodeDebugProtocol : ICDPSender
{
protected const int BUFFER_SIZE = 4096;
protected const string TWO_CRLF = "\r\n\r\n";
protected static readonly Regex CONTENT_LENGTH_MATCHER = new Regex(@"Content-Length: (\d+)");
protected static readonly Encoding Encoding = System.Text.Encoding.UTF8;
private Stream _outputStream;
private ByteBuffer _rawData;
private int _bodyLength;
private bool _stopRequested;
private ICDPListener listener;
public VSCodeDebugProtocol(ICDPListener listener)
{
_bodyLength = -1;
_rawData = new ByteBuffer();
this.listener = listener;
}
public void Loop(Stream inputStream, Stream outputStream)
{
_outputStream = outputStream;
byte[] buffer = new byte[BUFFER_SIZE];
_stopRequested = false;
while (!_stopRequested) {
var read = inputStream.Read(buffer, 0, buffer.Length);
if (read == 0) {
// end of stream
break;
}
if (read > 0) {
_rawData.Append(buffer, read);
ProcessData();
}
}
}
public void Stop()
{
_stopRequested = true;
}
// ---- private ------------------------------------------------------------------------
private void ProcessData()
{
while (true) {
if (_bodyLength >= 0) {
if (_rawData.Length >= _bodyLength) {
var buf = _rawData.RemoveFirst(_bodyLength);
_bodyLength = -1;
Dispatch(Encoding.GetString(buf));
continue; // there may be more complete messages to process
}
}
else {
string s = _rawData.GetString(Encoding);
var idx = s.IndexOf(TWO_CRLF);
if (idx != -1) {
Match m = CONTENT_LENGTH_MATCHER.Match(s);
if (m.Success && m.Groups.Count == 2) {
_bodyLength = Convert.ToInt32(m.Groups[1].ToString());
_rawData.RemoveFirst(idx + TWO_CRLF.Length);
continue; // try to handle a complete message
}
}
}
break;
}
}
private void Dispatch(string reqText)
{
var request = JsonConvert.DeserializeObject<Request>(reqText);
if (request != null && request.type == "request")
{
listener.X_FromVSCode(request.command, request.seq, request.arguments, reqText);
}
else
{
MessageBox.WTF(reqText);
Environment.Exit(1);
}
}
public void SendMessage(MessageToVSCode message)
{
var data = ConvertToBytes(message);
try {
_outputStream.Write(data, 0, data.Length);
_outputStream.Flush();
}
catch (Exception) {
// ignore
}
}
public void SendJSONEncodedMessage(byte[] json)
{
var data = PrependSizeHeader(json);
try
{
_outputStream.Write(data, 0, data.Length);
_outputStream.Flush();
}
catch (Exception)
{
// ignore
}
}
private static byte[] ConvertToBytes(MessageToVSCode message)
{
var asJson = JsonConvert.SerializeObject(message);
byte[] jsonBytes = Encoding.GetBytes(asJson);
return PrependSizeHeader(jsonBytes);
}
private static byte[] PrependSizeHeader(byte[] jsonBytes)
{
string header = string.Format("Content-Length: {0}{1}", jsonBytes.Length, TWO_CRLF);
byte[] headerBytes = Encoding.GetBytes(header);
byte[] data = new byte[headerBytes.Length + jsonBytes.Length];
System.Buffer.BlockCopy(headerBytes, 0, data, 0, headerBytes.Length);
System.Buffer.BlockCopy(jsonBytes, 0, data, headerBytes.Length, jsonBytes.Length);
return data;
}
public void SendOutput(string category, string data)
{
if (!String.IsNullOrEmpty(data))
{
SendMessage(new OutputEvent(category, data));
}
}
}
//--------------------------------------------------------------------------------------
class ByteBuffer
{
private byte[] _buffer;
public ByteBuffer() {
_buffer = new byte[0];
}
public int Length {
get { return _buffer.Length; }
}
public string GetString(Encoding enc)
{
return enc.GetString(_buffer);
}
public void Append(byte[] b, int length)
{
byte[] newBuffer = new byte[_buffer.Length + length];
System.Buffer.BlockCopy(_buffer, 0, newBuffer, 0, _buffer.Length);
System.Buffer.BlockCopy(b, 0, newBuffer, _buffer.Length, length);
_buffer = newBuffer;
}
public byte[] RemoveFirst(int n)
{
byte[] b = new byte[n];
System.Buffer.BlockCopy(_buffer, 0, b, 0, n);
byte[] newBuffer = new byte[_buffer.Length - n];
System.Buffer.BlockCopy(_buffer, n, newBuffer, 0, _buffer.Length - n);
_buffer = newBuffer;
return b;
}
}
}