private async Task SocketBeginConnect(MyHttpRequest request)
{
request.socket.BeginConnect(request.ipEndpoint,
BeginConnectCallbackMethod,
request);
await Task.FromResult <object>(request.isConnected.WaitOne());
}
private void BeginSendCallbackMethod(IAsyncResult result)
{
// we get the request that has been passed as state
// and cast it back to its original class
MyHttpRequest request = (MyHttpRequest)result.AsyncState;
if (request == null)
{
return;
}
int sentBytes = request.socket.EndSend(result);
// print message to inform user about the status of the
// operations
Console.WriteLine("Identificator " + request.identificator +
": Socket Connection for host=" + request.host +
" has sent " + sentBytes + " bytes");
// move to the next step
request.socket.BeginReceive(
request.buffer,
0,
MyHttpRequest.bufferSize,
0,
BeginReceiveCallbackMethod,
request);
}
private void BeginConnectCallbackMethod(IAsyncResult result)
{
// we get the request that has been passed as state
// and cast it back to its original class
MyHttpRequest request = (MyHttpRequest)result.AsyncState;
// we check to see if the received request is correct or not
if (request == null)
{
return;
}
// print message to inform user about the status of the
// operations
Console.WriteLine("Identificator " + request.identificator +
": Socket Connection for host=" + request.host);
HttpParser httpParser = new HttpParser();
byte[] data = Encoding.ASCII
.GetBytes(httpParser.CreateGetRequestString(request.host, request.endpoint));
// we now move to the BeginSent
request.socket.BeginSend(data,
0,
data.Length,
0,
BeginSendCallbackMethod,
request);
}
private void FetchData(int identificator, string host)
{
// retrieve the IP address of the host, based on the DNS
IPAddress hostIP = Dns.GetHostEntry(host.Split('/')[0]).AddressList[0];
// prepare endpoint
IPEndPoint ipEndpoint = new IPEndPoint(hostIP, HttpParser.httpPortNumber);
// create the client socker for the TCP/IP protocol
Socket client = new Socket(hostIP.AddressFamily,
SocketType.Stream,
ProtocolType.Tcp);
// prepare the endpoint from host and the host
string endpoint = "/";
if (host.Split('/').Length > 1)
{
endpoint = host.Substring(host.IndexOf("/", StringComparison.Ordinal));
}
host = host.Split('/')[0];
// we create an instance of MyHttpRequest
MyHttpRequest request = new MyHttpRequest(host,
endpoint,
client,
ipEndpoint,
identificator);
// we innitiate the connection via the socket
request.socket.BeginConnect(request.ipEndpoint,
BeginConnectCallbackMethod,
request);
}
private Task SocketBeginConnect(MyHttpRequest request)
{
request.socket.BeginConnect(request.ipEndpoint,
BeginConnectCallbackMethod,
request);
return(Task.FromResult(request.isConnected.WaitOne()));
}
private async Task SocketBeginReceive(MyHttpRequest request)
{
request.socket.BeginReceive(request.buffer,
0,
MyHttpRequest.bufferSize,
0,
BeginReceiveCallbackMethod,
request);
await Task.FromResult <object>(request.isReceived.WaitOne());
}
private Task SocketBeginReceive(MyHttpRequest request)
{
request.socket.BeginReceive(request.buffer,
0,
MyHttpRequest.bufferSize,
0,
BeginReceiveCallbackMethod,
request);
return(Task.FromResult(request.isReceived.WaitOne()));
}
private async Task SocketBeginSend(MyHttpRequest request)
{
HttpParser httpParser = new HttpParser();
byte[] data = Encoding.ASCII.GetBytes(httpParser.CreateGetRequestString(request.host, request.endpoint));
request.socket.BeginSend(data,
0,
data.Length,
0,
BeginSendCallbackMethod,
request);
await Task.FromResult <object>(request.isSent.WaitOne());
}
public async void FetchData(object arguments)
{
// unwrap the contet from arguments
// namely, like in taks1, we will
// pass to FetchData host and an
// identifier
int identificator = ((ValueTuple <int, string>)arguments).Item1;
string host = ((ValueTuple <int, string>)arguments).Item2;
// retrieve the IP address of the host, based on the DNS
IPAddress hostIP = Dns.GetHostEntry(host.Split('/')[0]).AddressList[0];
// prepare endpoint
IPEndPoint ipEndpoint = new IPEndPoint(hostIP, HttpParser.httpPortNumber);
// create the client socker for the TCP/IP protocol
Socket client = new Socket(hostIP.AddressFamily,
SocketType.Stream,
ProtocolType.Tcp);
// prepare the endpoint from host and the host
string endpoint = "/";
if (host.Split('/').Length > 1)
{
endpoint = host.Substring(host.IndexOf("/", StringComparison.Ordinal));
}
host = host.Split('/')[0];
// we create an instance of MyHttpRequest
MyHttpRequest request = new MyHttpRequest(host,
endpoint,
client,
ipEndpoint,
identificator);
await this.SocketBeginConnect(request);
await this.SocketBeginSend(request);
await this.SocketBeginReceive(request);
string[] content = request.content.ToString().Split('\r', '\n');
string cont = "";
foreach (string line in content)
{
cont += line + "\n";
}
Console.WriteLine("Identificator: " + request.identificator + "\n" + cont);
request.socket.Shutdown(SocketShutdown.Both);
request.socket.Close();
}
private void BeginReceiveCallbackMethod(IAsyncResult result)
{
// we get the request that has been passed as state
// and cast it back to its original class
MyHttpRequest request = (MyHttpRequest)result.AsyncState;
if (request == null)
{
return;
}
try
{
int noBytes = request.socket.EndReceive(result);
HttpParser httpParser = new HttpParser();
request.content.Append(Encoding.ASCII.GetString(request.buffer, 0, noBytes));
if (!httpParser.ContainsHeader(request.content.ToString()))
{
request.socket.BeginReceive(request.buffer,
0,
MyHttpRequest.bufferSize,
0,
BeginReceiveCallbackMethod,
request);
}
else
{
string body = httpParser.GetResponseBody(request.content.ToString());
int contentLength = httpParser.GetContentLenght(request.content.ToString());
if (body.Length < contentLength)
{
request.socket.BeginReceive(request.buffer,
0,
MyHttpRequest.bufferSize,
0,
BeginReceiveCallbackMethod,
request);
}
else
{
request.isReceived.Set();
}
}
}
catch (Exception exception)
{
Console.WriteLine(exception.ToString());
}
}
private void BeginConnectCallbackMethod(IAsyncResult result)
{
MyHttpRequest request = (MyHttpRequest)result.AsyncState;
try
{
Console.WriteLine("Identifier: " + request.identificator +
" socket made connection to " + request.host);
request.socket.EndConnect(result);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
request.isConnected.Set();
}
private void BeginSendCallbackMethod(IAsyncResult result)
{
MyHttpRequest request = (MyHttpRequest)result.AsyncState;
try
{
int noBytes = request.socket.EndSend(result);
Console.WriteLine("Identificator: " + request.identificator +
"\nSocket sent " + noBytes + " bytes to server");
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
request.isSent.Set();
}
private void BeginReceiveCallbackMethod(IAsyncResult result)
{
// we get the request that has been passed as state
// and cast it back to its original class
MyHttpRequest request = (MyHttpRequest)result.AsyncState;
if (request == null)
{
return;
}
try
{
int noBytes = request.socket.EndReceive(result);
HttpParser httpParser = new HttpParser();
request.content.Append(Encoding.ASCII.GetString(request.buffer, 0, noBytes));
if (!httpParser.ContainsHeader(request.content.ToString()))
{
request.socket.BeginReceive(request.buffer,
0,
MyHttpRequest.bufferSize,
0,
BeginReceiveCallbackMethod,
request);
}
else
{
string body = httpParser.GetResponseBody(request.content.ToString());
int contentLength = httpParser.GetContentLenght(request.content.ToString());
if (body.Length < contentLength)
{
request.socket.BeginReceive(request.buffer,
0,
MyHttpRequest.bufferSize,
0,
BeginReceiveCallbackMethod,
request);
}
else
{
Console.WriteLine("Identificator " + request.identificator +
": Socket Connection for host=" + request.host +
" received response!!!");
string[] content = request.content.ToString().Split('\r', '\n');
string cont = "";
foreach (string line in content)
{
cont += line + "\n";
}
Console.WriteLine("Identificator: " + request.identificator + "\n" + cont);
request.socket.Shutdown(SocketShutdown.Both);
request.socket.Close();
}
}
}
catch (Exception exception)
{
Console.WriteLine(exception.ToString());
}
}