c++怎么读取socket的buff的utf8字符串

c++如何读取socket的buff的utf8字符串
如题

就是socket进行recv之后，往自己定义的recvbuff里面写入数据，int、short、bool什么的都没问题就是utf8的字符串不行

我用as3编写的客户端用writeUTF方法给服务端发送字符串，收出来老是乱码

查询了半天资料结果发现是编码的问题，结果又尝试解决了很久也没搞定

特来求助高手，希望能给出示例代码

感谢感谢

[解决办法]
客户端用：
socket.writeBytes(buffer);
行不？
[解决办法]
你的程序如果是ansi编码，需要将utf8转码为gbk

转码可用iconv来做，libiconv字符集转换库使用方法
[解决办法]
以下代码希望能给你一些帮助

C/C++ code

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="initApp()"><mx:Script> <![CDATA[  import flash.events.SecurityErrorEvent;  import flash.events.IOErrorEvent;  import flash.events.ProgressEvent;    import flash.net.Socket;    import flash.utils.ByteArray;    private var socket:Socket = new Socket();  internal function initApp():void  {   socket.addEventListener(Event.CLOSE,closeHandler);   socket.addEventListener(Event.CONNECT,connectHandler);   socket.addEventListener(IOErrorEvent.IO_ERROR,ioErrorHandler);   socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR,securityErrorHandler);   socket.addEventListener(ProgressEvent.SOCKET_DATA,socketDataHandler);  }    internal function closeHandler(evt:Event):void  {   output("connect fail and close");  }    internal function connectHandler(evt:Event):void  {   output("connect success");  }    internal function ioErrorHandler(evt:IOErrorEvent):void  {   output("io error:"+evt.text);  }    internal function securityErrorHandler(evt:SecurityErrorEvent):void  {   output("security error :"+evt.text);  }    internal function doConnect():void  {   var server:String = server_txt.text;   var port:Number =Number(port_txt.text);      socket.connect(server,port);     }    internal function socketDataHandler(evt:ProgressEvent):void  {   var msg:String;   while(socket.bytesAvailable)   msg+=socket.readMultiByte(socket.bytesAvailable,"utf8");   var arr:Array = msg.split('\n');   for(var i:int=0;i<arr.length;i++)   {    if(arr[i].length>1)    {     var myPattern:RegExp=/\r/;     arr[i]=arr[i].replace(myPattern,'');     output(arr[i]);    }   }  }    internal function sendMessage(msg:String):void  {   var message:ByteArray = new ByteArray();   message.writeUTFBytes(msg+"\r\n");    socket.writeBytes(message);    socket.flush();  }    internal function output(msg:String):void  {   msg=msg+"\n";   output_txt.text+=msg;  }   ]]></mx:Script><mx:Panel x="368" y="25" width="360" height="336" layout="absolute" title="输出信息"> <mx:TextArea x="10" y="77" width="100%" height="213" id="output_txt"/> <mx:TextInput x="23" y="37" id="input_txt" text="输入信息" enter="sendMessage(input_txt.text)"/> <mx:Button x="246" y="37" label="发送" click="sendMessage(input_txt.text)"/> </mx:Panel> <mx:Panel x="40" y="78" width="250" height="200" layout="absolute" title="登陆窗口">  <mx:Label x="10" y="10" text="服务器地址"/>  <mx:TextInput x="73" y="8" width="147" id="server_txt" text="127.0.0.1"/>  <mx:Label x="10" y="51" text="端口"/>  <mx:TextInput x="73" y="49" width="147" id="port_txt" text="80"/>  <mx:Button x="73" y="109" label="连接" click="doConnect()"/> </mx:Panel></mx:Application>下面是c++服务器端：// server.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include <winsock2.h>#include <windows.h>#include <iostream>using namespace std;#pragma comment(lib,"ws2_32.lib") void main(){  WORD wVersionRequested; WSADATA wsaData; int err; short port=80;//端口号  wVersionRequested = MAKEWORD( 1, 1 );  err = WSAStartup( wVersionRequested, &wsaData );//初始化套接字 if ( err != 0 ) {    return; }  if ( LOBYTE( wsaData.wVersion ) != 1 || HIBYTE( wsaData.wVersion ) != 1 ) {    WSACleanup( );    return; }  SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);//创建套接字 SOCKET sockConn;//用来和客户端通信的套接字  SOCKADDR_IN addrSrv;//用来和客户端通信的套接字地址  addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY); addrSrv.sin_family=AF_INET; addrSrv.sin_port=htons(port);  bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));//绑定端口  listen(sockSrv,5);//侦听 printf("Server %d is listening......\n",port);  SOCKADDR_IN addrClient;   int len=sizeof(SOCKADDR); char buf[4096];//接收的数据char rbuf[100]="成功";//返回的数据  while(1) {        //接受连接         sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);         printf("Accept connection from %s\n",inet_ntoa(addrClient.sin_addr));          //接收数据         int bytes;         if((bytes=recv(sockConn,buf,sizeof(buf),0))==SOCKET_ERROR){              printf("接收数据失败!\n");              exit(-1);         }         buf[bytes]='\0';         printf("Message from %s: %s\n",inet_ntoa(addrClient.sin_addr),buf);          //发送数据        if(send(sockConn,rbuf,strlen(rbuf)+1,0)==SOCKET_ERROR){              printf("发送数据失败！");              exit(-1);         }        printf("Message to %s: %s\n",inet_ntoa(addrClient.sin_addr),rbuf);         //清理套接字占用的资源        closesocket(sockConn); }} 
 
[解决办法]
我只说一下我的做法：
1.我们强制规定，socket中传输的，一定是char*，则它必然以\0结尾。

2.为了使得char*能立刻传出，而不是等到缓冲区满了才传，强制要求字符串末尾处加上\r\n.

3.考虑到UNICODE编码，传入时使用T2A转换，传出时使用A2T转换。