Socket——实现客户端和服务端的文件传送
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- Socket 概念
- Socket 实现原理Demo
下面是示例程序的简单步骤说明
服务器端：
第一步：用指定的端口号和服务器的ip建立一个EndPoint对像；
第二步：建立一个Socket对像；
第三步：用socket对像的Bind()方法绑定EndPoint；
第四步：用socket对像的Listen()方法开始监听；
第五步：接受到客户端的连接，用socket对像的Accept()方法创建新的socket对像用于和请求的客户端进行通信;
第六步：通信结束后一定记得关闭socket;
代码：using?System;using?System.Collections.Generic;using?System.Text;using?System.Net;using?System.Net.Sockets;namespace?server
{
????class?Program
????{????????static?void?Main(string[]?args)????????{????????????int?port?=?2000;????????????string?host?=?"127.0.0.1";????????????///创建终结点（EndPoint）????????????IPAddress?ip??=?IPAddress.Parse(host);//把ip地址字符串转换为IPAddress类型的实例????????????IPEndPoint?ipe?=?new?IPEndPoint(ip,?port);//用指定的端口和ip初始化IPEndPoint类的新实例????????????///创建socket并开始监听????????????Socket?s = new?Socket(AddressFamily.InterNetwork,?SocketType.Stream,?ProtocolType.Tcp);//创建一个socket对像，如果用udp协议，则要用SocketType.Dgram类型的套接字????????????s.Bind(ipe);//绑定EndPoint对像（2000端口和ip地址）????????????s.Listen(0);//开始监听????????????Console.WriteLine("等待客户端连接
");????????????///接受到client连接，为此连接建立新的socket，并接受信息????????????Socket?temp?=?s.Accept();//为新建连接创建新的socket????????????Console.WriteLine("建立连接");????????????string?recvStr?=?"";????????????byte[]?recvBytes?=?new?byte[1024];????????????int?bytes;????????????bytes?=?temp.Receive(recvBytes,?recvBytes.Length,?0);//从客户端接受信息????????????recvStr?+=?Encoding.ASCII.GetString(recvBytes,?0,?bytes);????????????///给client端返回信息????????????Console.WriteLine("server?get?message:{0}",?recvStr);//把客户端传来的信息显示出来????????????string?sendStr?=?"ok!Client?send?message?successful!";????????????byte[]?bs?=?Encoding.ASCII.GetBytes(sendStr);????????????temp.Send(bs,?bs.Length,?0);//返回信息给客户端????????????temp.Close();????????????s.Close();????????????Console.ReadLine();
????????}???????????}
}server结果：
客户端：
第一步：用指定的端口号和服务器的ip建立一个EndPoint对像；
第二步：建立一个Socket对像；
第三步：用socket对像的Connect()方法以上面建立的EndPoint对像做为参数，向服务器发出连接请求；
第四步：如果连接成功，就用socket对像的Send()方法向服务器发送信息；
第五步：用socket对像的Receive()方法接受服务器发来的信息?;
第六步：通信结束后一定记得关闭socket；
代码：using?System;using?System.Collections.Generic;using?System.Text;using?System.Net;using?System.Net.Sockets;namespace?Client{????class?Program????{????????static?void?Main(string[]?args)????????{????????????try????????????{????????????????int?port?=?2000;????????????????string?host?=?"127.0.0.1";????????????????///创建终结点EndPoint????????????????IPAddress?ip?=?IPAddress.Parse(host);????????????????//IPAddress?ipp?=?new?IPAddress("127.0.0.1");????????????????IPEndPoint?ipe?=?new?IPEndPoint(ip,?port);//把ip和端口转化为IPEndpoint实例????????????????///创建socket并连接到服务器????????????????Socket?c?=?new?Socket(AddressFamily.InterNetwork,?SocketType.Stream,?ProtocolType.Tcp);//创建Socket????????????????Console.WriteLine("Conneting…");????????????????c.Connect(ipe);//连接到服务器????????????????///向服务器发送信息????????????????string?sendStr?=?"hello!This?is?a?socket?test";????????????????byte[]?bs?=?Encoding.ASCII.GetBytes(sendStr);//把字符串编码为字节????????????????Console.WriteLine("Send?Message");????????????????c.Send(bs,?bs.Length,?0);//发送信息????????????????///接受从服务器返回的信息????????????????string?recvStr?=?"";????????????????byte[]?recvBytes?=?new?byte[1024];????????????????int?bytes;????????????????bytes?=?c.Receive(recvBytes,?recvBytes.Length,?0);//从服务器端接受返回信息????????????????recvStr?+=?Encoding.ASCII.GetString(recvBytes,?0,?bytes);????????????????Console.WriteLine("client?get?message:{0}",?recvStr);//显示服务器返回信息????????????????///一定记着用完socket后要关闭????????????????c.Close();????????????}????????????catch?(ArgumentNullException?e)????????????{????????????????Console.WriteLine("argumentNullException:?{0}",?e);????????????}????????????catch?(SocketException?e)????????????{????????????????Console.WriteLine("SocketException:{0}",?e);????????????}????????????Console.WriteLine("Press?Enter?to?Exit");????????}????}}Client端结果：
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