/*
* function called by the begin receive async callback
* ar is the socket wrapper
*/
public static void startReceive(IAsyncResult ar)
{
var socketWrap = (SocketWrapper)ar.AsyncState;
var socket = socketWrap.sock;
//Console.WriteLine("yea");
try
{
var requestFromStart = socket.EndReceive(ar);
//we unwrap the respons from the bytes recevied and append them to the content container
socketWrap.responseContent.Append(Encoding.ASCII.GetString(socketWrap.buffer, 0, requestFromStart));
//Console.WriteLine(Encoding.ASCII.GetString(socketWrap.buffer, 0, requestFromStart));
//we try to get the respone header
if (!HTTPParser.gotResponseHeader(socketWrap.responseContent.ToString()))
{
socket.BeginReceive(socketWrap.buffer, 0, 512, 0, startReceive, socketWrap);
//Console.WriteLine("yea");
}
//Console.WriteLine("yea");
var responseBody = HTTPParser.getResponseBody(socketWrap.responseContent.ToString());
var contentLenght = HTTPParser.getContentLen(socketWrap.responseContent.ToString());
//also we keep receiving if we didn't finish reading
if (responseBody.Length < contentLenght)
{
socket.BeginReceive(socketWrap.buffer, 0, 512, 0, startReceive, socketWrap);
}
//we print everything since there is nothing more to receive
else
{
foreach (var i in socketWrap.responseContent.ToString().Split('\r', '\n'))
{
System.Console.WriteLine(i);
}
System.Console.WriteLine("length is " + contentLenght);
socket.Shutdown(SocketShutdown.Both);
socket.Close();
}
}
catch (Exception e)
{
System.Console.WriteLine(e.ToString());
}
}
public static async void start(string link, int id)
{
var linkDns = Dns.GetHostEntry(link.Split('/')[0]);
var ipAddrs = linkDns.AddressList[0];
var remoteEndPoint = new IPEndPoint(ipAddrs, HTTPParser.PORT);
var socket = new Socket(ipAddrs.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
//if there is an endpoint we set it
var endpoint = String.Empty;
if (link.Contains("/"))
{
endpoint = link.Substring(link.IndexOf("/"));
}
else
{
endpoint = "/";
}
//create the socket wrapper since we needed more info than just the socket
var socketWrap = new SocketWrapper()
{
sock = socket,
hostname = link.Split('/')[0],
endpoint = endpoint,
remoteEndPoint = remoteEndPoint,
id = id
};
//we start each task and we make them wait until they are signaled
await connect(socketWrap);
await send(socketWrap, HTTPParser.getRequest(socketWrap.hostname, socketWrap.endpoint));
await receive(socketWrap);
//after response from the server is received we print it
Console.WriteLine(
"async: response {0} got : contentLenght = {1}",
id, HTTPParser.getContentLen(socketWrap.responseContent.ToString()));
//close the socket
socket.Shutdown(SocketShutdown.Both);
socket.Close();
}
/*
* function called by the begin connect async callback
* ar is the socket wrapper
*/
public static void startConnect(IAsyncResult ar)
{
//we deserialize the wrapper and get the info
var socketWrap = (SocketWrapper)ar.AsyncState;
var socket = socketWrap.sock;
var id = socketWrap.id;
var hostname = socketWrap.hostname;
socket.EndConnect(ar);
System.Console.WriteLine("Socket {0} connected to {1} (ip:{2})", id, hostname, socket.RemoteEndPoint);
//get the request that we want to make as a string and
//convert it to bytes so we can send it with BeginSend
var requestToBytes = Encoding.ASCII.GetBytes(HTTPParser.getRequest(hostname, socketWrap.endpoint));
//start sending the request as bytes
socket.BeginSend(requestToBytes, 0, requestToBytes.Length, 0, startSend, socketWrap);
}
private static void receiveCallback(IAsyncResult ar)
{
var socketWrap = (SocketWrapper)ar.AsyncState;
var socket = socketWrap.sock;
try
{
var requestFromStart = socket.EndReceive(ar);
//we unwrap the response from the bytes received and append them to the content container
socketWrap.responseContent.Append(Encoding.ASCII.GetString(socketWrap.buffer, 0, requestFromStart));
//Console.WriteLine(Encoding.ASCII.GetString(socketWrap.buffer, 0, requestFromStart));
//we re-try if we didn't get a response
if (!HTTPParser.gotResponseHeader(socketWrap.responseContent.ToString()))
{
socket.BeginReceive(socketWrap.buffer, 0, 512, 0, receiveCallback, socketWrap);
}
var responseBody = HTTPParser.getResponseBody(socketWrap.responseContent.ToString());
var contentLenght = HTTPParser.getContentLen(socketWrap.responseContent.ToString());
//also we keep receiving if we didn't finish reading
if (responseBody.Length < contentLenght)
{
socket.BeginReceive(socketWrap.buffer, 0, 512, 0, receiveCallback, socketWrap);
}
//we print everything since there is nothing more to receive
else
{
socketWrap.receiveFinished.Set();
}
}
catch (Exception e)
{
System.Console.WriteLine(e.ToString());
}
}
