System.Net.WebClient client=new WebClient();
byte[] page=client.DownloadData("http://www.google.com");
string content=System.Text.Encoding.UTF8.GetString(page); http://www.mscto.com
在dotnet下經常使用此類方法
string hostName="www.nnn.net";
label1.Text="xxx";
int port=80;
IPHostEntry ipInfo=Dns.GetHostByName(hostName);
//取得IPAddress[]
IPAddress[] ipAddr=ipInfo.AddressList;
//得到ip
IPAddress ip=ipAddr[0];
IPEndPoint hostEP=new IPEndPoint(ip,port);
Socket socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
socket.Connect(hostEP);
string sendStr="GET " "/tryst/default.asp" " HTTP/1.1/r/nHost: " hostName "/r/nConnection: Close/r/n/r/n";
//創建bytes字節數組以轉換髮送串
byte[] bytesSendStr=new byte[1024];
//將發送內容字符串轉換成字節byte數組
bytesSendStr=Encoding.ASCII.GetBytes(sendStr);
socket.Send(bytesSendStr,bytesSendStr.Length,0);
//聲明接收返回內容的字符串
string recvStr="";
//聲明字節數組,一次接收數據的長度爲1024字節
byte[] recvBytes=new byte[1024];
//返回實際接收內容的字節數
int bytes=0;
//循環讀取,直到接收完所有數據
while(true)
{
bytes=socket.Receive(recvBytes,recvBytes.Length,0);
//讀取完成後退出循環
if(bytes<=0)
break;
//將讀取的字節數轉換爲字符串
recvStr =Encoding.ASCII.GetString(recvBytes,0,bytes);
}
socket 方式以及模型:
不能看出跟程序的匹配,下載都是客戶機的機制,解釋出地址後,聲明socket,發送一段報文,返回信息
報文string sendStr="GET " "/tryst/default.asp" " HTTP/1.1/r/nHost: " hostName "/r/nConnection: Close/r/n/r/n";
用get方式,得到網站裏的某一個頁面,如果想得到網頁信息與webclient一樣可以用正則表達式