我想通过TCP连接发送此字符串:
TR220,2,A10000XX,3545.1743,5119.5794,001.0,1503,52:56:16,2012/09/13,0,0,0,0,0,V,000,0,0,0,,+989123456789,*
我正在使用此代码发送文字:
string uri = "http://localhost:1414";
String record = "TR220,2,A10000XX,3545.1743,5119.5794,001.0,1503,52:56:16,2012/09/13,0,0,0,0,0,V,000,0,0,0,,+989123456789,*";
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(uri);
request.Method = "POST";
byte[] postBytes = GetBytes(record);
request.ContentType = "text/plain";
request.ContentLength = postBytes.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(postBytes, 0, postBytes.Length);
和GetBytes方法:
private byte[] GetBytes(string str)
{
byte[] bytes = new byte[str.Length * sizeof(char)];
System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
return bytes;
}
发送此请求后,在另一方应用程序中,我得到了这个字符串:
POST / HTTP/1.1\r\nContent-Type: text/plain\r\nHost: localhost:1414\r\nContent-Length: 212\r\nExpect: 100-continue\r\nConnection: Keep-Alive\r\n\r\n
使用这段代码:
tcpListener = new TcpListener(IPAddress.Any, 1414);
listenThread = new Thread(new ThreadStart(ListenForClients));
listenThread.Start();
和ListenForClients方法(为清晰起见省略了一些代码):
NetworkStream clientStream = tcpClient.GetStream();
byte[] message = new byte[4096];
int bytesRead;
while (true)
{
bytesRead = 0;
try { bytesRead = clientStream.Read(message, 0, 4096); }
catch { break; }
ASCIIEncoding encoder = new ASCIIEncoding();
String data = encoder.GetString(message, 0, bytesRead);
MessageReceived(data);
}
我的问题是为什么发送和接收的字符串不一样?
答案 0 :(得分:2)
你确定你知道你在做什么吗?您正在将HTTP数据包发送到原始TCP套接字,当然您将获得围绕真实有效负载的HTTP协议字符串。在两端使用相同类型的插座,否则最终会发疯。
这有点旧,但似乎总是足够你所需要的东西:Google就是你的朋友。
http://www.codeproject.com/Articles/12893/TCP-IP-Chat-Application-Using-C
为什么TCP套接字正在接收HTTP连接而没有任何障碍? HTTP是通过TCP运行的,它只是一个正式的协议。