Для формирования запросов и получения ответов сервера использовать функции для работы с сокетами/
Есть взятый из msdn кусок
| Код | public class GetSocket
{
private static Socket ConnectSocket(string server, int port)
{
Socket s = null;
IPHostEntry hostEntry = null;
// Get host related information.
hostEntry = Dns.GetHostEntry(server);
// Loop through the AddressList to obtain the supported AddressFamily. This is to avoid
// an exception that occurs when the host IP Address is not compatible with the address family
// (typical in the IPv6 case).
foreach (IPAddress address in hostEntry.AddressList)
{
IPEndPoint ipe = new IPEndPoint(address, port);
Socket tempSocket =
new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
tempSocket.Connect(ipe);
if (tempSocket.Connected)
{
s = tempSocket;
break;
}
else
{
continue;
}
}
return s;
}
// This method requests the home page content for the specified server.
public static string SocketSendReceive(string server, int port, string pages)
{
//string pages = "/info/studcity/";
string request = "";
pages = "/" + pages + "/";
if (pages != "")
request = "GET " + pages + " HTTP/1.1\r\nHost: " + server +
"\r\nConnection: Close\r\n\r\n";
else
request = "GET / HTTP/1.1\r\nHost: " + server +
"\r\nConnection: Close\r\n\r\n";
Byte[] bytesSent = Encoding.Default.GetBytes(request);
Byte[] bytesReceived = new Byte[256];
// Create a socket connection with the specified server and port.
Socket s = ConnectSocket(server, port);
if (s == null)
return ("Connection failed");
// Send request to the server.
s.Send(bytesSent, bytesSent.Length, 0);
// Receive the server home page content.
int bytes = 0;
string page = "Default HTML page on " + server + ":\r\n";
// The following will block until te page is transmitted.
do
{
bytes = s.Receive(bytesReceived, bytesReceived.Length, 0);
page = page + Encoding.Default.GetString(bytesReceived, 0, bytes);
}
while (bytes > 0);
return page;
}
} |
и свои попытки поиска ссылок по коду страницы
| Код | string result = "";
int port = Convert.ToInt32(textBox2.Text);
string myhost = Convert.ToString(textBox1.Text);
listHREF = new List<string>();
listHREF.Add(myhost);
k++;
result = GetSocket.SocketSendReceive(myhost, port, "");
//выводится полученный код страницы
richTextBox1.Text = result;
//выделяем все ссылки
int startindex = 0;
int endindex = 0;
int value = 0;
string s;
long n = result.Length;
while (value != -1)
{
value = result.IndexOf("<a href=");
if (value != -1)
{
startindex = value + 9;
endindex = result.IndexOf("\"", startindex) - 1;
s = result.Substring(startindex, endindex - startindex + 1);
if (!listHREF.Contains<string>(s))
{
listHREF.Add(s);
k++;
}
result = result.Substring(endindex + 1);
}
} |
Про Content-Length в заголовке знаю, но как то не всегда встречается.. как считать размер страницы, если нет Content-Length?
спасибо за помощь... |
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