【发布时间】：2011-08-15 17:02:02
【问题描述】：
我正在尝试创建一个 C# Websocket 服务器，但似乎无法正常工作。 我现在有一个接受 TCPClient 的服务器，接收来自客户端的 HTTP 请求并尝试发回 HTTP 响应，以便可以完成 HTML5 WebSocket 握手。
我认为服务器发送给客户端的握手有问题。 我阅读了草案 (Websocket 76 draft)，其中指出在握手结束时必须对给出的两个键给出响应。此响应由服务器计算。
这是我的代码：
static void Main(string[] args)
{
int port = 8181;
IPAddress localAddr = IPAddress.Loopback;
TcpListener server = new TcpListener(localAddr, port);
server.Start();
// Buffer for reading data
Byte[] receivedBytes = new Byte[256];
String data = null;
// Enter the listening loop.
while (true)
{
Console.WriteLine("Waiting for a connection...");
// Perform a blocking call to accept requests.
// You could also user server.AcceptSocket() here.
TcpClient client = server.AcceptTcpClient();
Console.WriteLine("Connected!\n");
data = null;
// Get a stream object for reading and writing
NetworkStream stream = client.GetStream();
int i;
// Loop to receive all the data sent by the client.
while ((i = stream.Read(receivedBytes, 0, receivedBytes.Length)) != 0)
{
// Translate data bytes to a ASCII string.
data = System.Text.Encoding.UTF8.GetString(receivedBytes, 0, i);
Console.WriteLine("Received:");
Console.WriteLine(data);
Byte[] response_token = hashResponse(data);
string handshake = "HTTP/1.1 101 WebSocket Protocol Handshake\r\n"
+ "Upgrade: WebSocket\r\n" + "Connection: Upgrade\r\n"
+ "Sec-WebSocket-Origin: http://localhost\r\n"
+ "Sec-WebSocket-Location: ws://localhost:8181/websession\r\n"
+ "\r\n";
Byte[] writtenBytes = Encoding.UTF8.GetBytes(handshake);
stream.Write(writtenBytes, 0, writtenBytes.Length);
stream.Write(response_token, 0, response_token.Length);
Console.WriteLine("Send:");
Console.WriteLine(handshake);
string strHash = Encoding.UTF8.GetString(response_token);
Console.WriteLine(strHash);
}
}
}
static Byte[] hashResponse(string receivedData)
{
string strDel = "\r\n";
char[] delimeter = strDel.ToCharArray();
string Key1 = null;
string Key2 = null;
string hash = null;
MD5 md5 = MD5.Create();
string[] lines = receivedData.Split(delimeter);
Key1 = lines[10].Substring(20);
Key2 = lines[12].Substring(20);
hash = lines[16];
Int64 numbersKey1 = Convert.ToInt64(string.Join(null, Regex.Split(Key1, "[^\\d]")));
Int64 numbersKey2 = Convert.ToInt64(string.Join(null, Regex.Split(Key2, "[^\\d]")));
Int64 numberSpaces1 = countSpaces(Key1);
Int64 numberSpaces2 = countSpaces(Key2);
int dividedKey1 = (int) (numbersKey1 / numberSpaces1);
int dividedKey2 = (int) (numbersKey2 / numberSpaces2);
Byte[] encodedKey1 = Encoding.UTF8.GetBytes(dividedKey1.ToString());
Byte[] encodedKey2 = Encoding.UTF8.GetBytes(dividedKey2.ToString());
Byte[] encodedHash = Encoding.UTF8.GetBytes(hash);
Byte[] combined = Encoding.UTF8.GetBytes(dividedKey1.ToString() + dividedKey2.ToString() + hash);
Byte[] responseHash = md5.ComputeHash(combined);
return responseHash;
}
static int countSpaces(string key)
{
int counter = 0;
char[] charArray = key.ToCharArray();
foreach (char c in charArray)
{
if (c.Equals(' '))
counter++;
}
return counter;
}
我用于测试的 HTML 页面（名为 Test.html）由运行在我的计算机上的 apache 网络服务器托管，我通过浏览（在 Chrome 中）到 http://localhost/Test.html 来访问它
有没有人知道我做错了什么，因为我变得非常绝望。
提前致谢
丹尼斯
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