我正在尝试使用套接字下载网站的源代码。目前我可以下载标题,然后我只是终止连接,因为我不知道我应该收到多长时间的数据。这是代码:
private void HandleConnect(SocketAsyncEventArgs e)
{
if (e.ConnectSocket != null)
{
// simply start sending
bool completesAsynchronously = e.ConnectSocket.SendAsync(e);
// check if the completed event will be raised.
// if not, invoke the handler manually.
if (!completesAsynchronously)
{
SocketAsyncEventArgs_Completed(e.ConnectSocket, e);
}
}
}
private void HandleReceive(SocketAsyncEventArgs e)
{
string responseL = Encoding.UTF8.GetString(e.Buffer, 0, e.Buffer.Length);
response += responseL;
temp += responseL;
string[] lines = Regex.Split(response, "\r\n\r\n");
if (lines.Length > 1 && header == "")
{
header = lines[0].ToString() + "\r\n";
lines[0] = "";
response = lines.ToString();
}
if (header == "")
{
bool completesAsynchronously = e.ConnectSocket.ReceiveAsync(e);
}
else
{
System.Windows.Deployment.Current.Dispatcher.BeginInvoke(delegate()
{
_callback(false, this);
});
}
}
我试图搜索\ r \ n但它没有帮助:/
请帮忙!
提前谢谢你:)
答案 0 :(得分:3)
我使用此代码将标头发送到网站,然后阅读其内容。我希望你觉得它很有用。
ReadStateObject stateObject; //Info below
mytcpclient = new TcpClient();
mytcpclient.Connect(host, port);
mysocket = mytcpclient.Client;
SendHeader(mysocket);//Info below
ns = mytcpclient.GetStream();
if (ns.CanRead)
{
stateObject = new ReadStateObject(ns, 1024);
ns.BeginRead(stateObject.ReadBuffer, 0, stateObject.ReadBuffer.Length, new AsyncCallback(ReadCallBack), stateObject);
}
StateObject是一个小类,用于表示BeginRead方法中的AsyncState对象:
class ReadStateObject
{
public NetworkStream Stream {get; set;}
public byte[] ReadBuffer;
public ReadStateObject(NetworkStream _stream, int bufferSize)
{
Stream = _stream;
ReadBuffer = new byte[bufferSize];
}
}
这是BeginRead方法中使用的回调方法。
private void ReadCallBack(IAsyncResult result)
{
ReadStateObject stateObject = (ReadStateObject)result.AsyncState;
NetworkStream myNetworkStream = stateObject.Stream;
int numberofbytesread = 0;
StringBuilder sb = new StringBuilder();
numberofbytesread = myNetworkStream.EndRead(result);
sb.Append(Encoding.ASCII.GetString(stateObject.ReadBuffer, 0, numberofbytesread));
/*It seems, if there is no delay, the DataAvailable may not be true even when there are still data to be received from the site, so I added this delay. Any suggestions, how to avoid this are welcome*/
Thread.Sleep(500);
while (myNetworkStream.DataAvailable)
{
byte[] mydata = new byte[1024];
numberofbytesread = myNetworkStream.Read(mydata, 0, mydata.Length);
sb.Append(Encoding.ASCII.GetString(mydata, 0, numberofbytesread));
}
Console.Writeln(sb.ToString());
mytcpclient.Close();
}
这就是Headers被发送到网站的地方
public void SendHeader(Socket mySocket)
{
String sBuffer = "";
sBuffer = sBuffer + "GET /"+pathquery+" HTTP/1.1" + "\r\n";
sBuffer = sBuffer + "Host: "+ hostname + "\r\n";
sBuffer = sBuffer + "Content-Type: text/html\r\n";
sBuffer = sBuffer + "\r\n";
Byte[] bSendData = Encoding.ASCII.GetBytes(sBuffer);
mySocket.Send(Encoding.ASCII.GetBytes(sBuffer), Encoding.ASCII.GetBytes(sBuffer).Length, 0);
}
答案 1 :(得分:1)
也许,您应该使用WebClient
或HttpWebRequest
而不是套接字。
使用套接字和解释Http协议可能会很痛苦。