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SGS的一点初级心得

Posted on 2009-11-24 10:38  Bill Yuan  阅读(1372)  评论(0编辑  收藏  举报

转自: http://www.eb163.com/home/space-7286-do-blog-id-21.html

 

 

首先我希望大家看一看http://blog.csdn.net/ripotala/archive/2008/10/14/3075456.aspx这个地址
的文章对sgs有一定的了解先。

心得:(客户端篇)
在sgs官网上已经有人写了多套针对as3.0的库,对比觉得还是alienos比较好。具体下载方
法如下:首先登陆http://www.eb163.com/home/link.php?url=http://code.google.com%2Fp%2Fdarkstar-as3%2F下载这个库。这个分别是对应着是
HelloUser 和 HelloChannel 这两个sgs自带服务器例子
跟着我们在使用之前请在com.alienos.sgs.as3.client.SimpleClient
public function SimpleClient(host:String, port:int)
{
    
this.host = host;
    
this.port = port;
    sock.addEventListener(Event.CLOSE, onClose);
    sock.addEventListener(Event.CONNECT, onConnect);
    sock.addEventListener(ProgressEvent.SOCKET_DATA, onData);        
   
 sock.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
    sock.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);

    
messageFilter = new MessageFilter();
    messageFilter.addEventListener(SgsEvent.RAW_MESSAGE, onRawMessage);
}

private function securityErrorHandler(event:SecurityErrorEvent):void {
//trace("securityErrorHandler: " + event);
    dispatchEvent(new SgsEvent(SgsEvent.SECURITYERROR));  }

private function ioErrorHandler(event:IOErrorEvent):void {
    
//trace("ioErrorHandler: " + event);
    dispatchEvent(new SgsEvent(SgsEvent.IOERROR));   }
    


和com.alienos.sgs.as3.client.SgsEvent

  public static const CHANNEL_MESSAGE:String                = "channelMessage";
  public static const CHANNEL_LEAVE:String                = "channelLeave";        
  public static const RAW_MESSAGE:String                        = "rawMessage";        
  public static const IOERROR:String                            = "ioError";        
  public static const SECURITYERROR:String            = "securityError";   


 加上以上的红色的字体不然会报io错误。

接着我们就可以使用这个库自带的main.mxml文件了,只要销加修改就能加入到你的项目里了。

心得:(服务端篇)
具体的请看英文原版ServerAppTutorial.pdf。

有的人问“偶当初登录是有传password给服务端的啊,为啥找遍API就是没有getpassword()的语句的呢?”
原来sgs是要你自定义登陆截取的。
比如你要检查密码是否正确:
你就要:XXXXXXX.properties上加上
com.sun.sgs.app.authenticators=自定义类
具体例子如下
HelloWorld.properties上加上
com.sun.sgs.app.name=HelloWorld
com.sun.sgs.app.root=data/HelloWorld
com.sun.sgs.app.port=1139
com.sun.sgs.app.listener=com.sun.sgs.tutorial.server.lesson1.HelloWorld
com.sun.sgs.app.authenticators=com.sun.sgs.server.auth.CustomAuthenticator

具体类如下:

package com.sun.sgs.server.auth;

import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.security.auth.login.CredentialException;
import javax.security.auth.login.LoginException;

import com.sun.sgs.auth.Identity;
import com.sun.sgs.auth.IdentityAuthenticator;
import com.sun.sgs.auth.IdentityCredentials;
import com.sun.sgs.impl.auth.IdentityImpl;
import com.sun.sgs.impl.auth.NamePasswordCredentials;

public class CustomAuthenticator implements IdentityAuthenticator
{
        
private static final Logger logger =
                Logger.getLogger(CustomAuthenticator.
class.getName());
        
        
public CustomAuthenticator(Properties properties)
        {
                logger.info(
">>> Custom Authenticator created! <<<");
        }

        
public Identity authenticateIdentity(IdentityCredentials credentials)
                        
throws LoginException
        {
                
if(!credentials.getCredentialsType().equals(NamePasswordCredentials.TYPE_IDENTIFIER))
                {
                        logger.warning(
"Unsupported credentials type!");
                        
throw new CredentialException("Unsupported credentials type.");
                }
                
                NamePasswordCredentials npc 
= (NamePasswordCredentials)credentials;
                String name 
= npc.getName();
                
char[] password = npc.getPassword();//获得password
                logger.log(Level.INFO, ">>> Name: {0} Password: {1} <<<",
                                
new Object[]{name, new String(password)});
                
if(password.length == 0 || password[0!= 'a')
                {
                        logger.warning(
"Invalid password.");
                        
throw new CredentialException("Invalid password.");
                }
                
                logger.log(Level.INFO, 
">>> User {0} authenicated. <<<"new Object[]{name});
                
return new IdentityImpl(name);
        }

        
public String[] getSupportedCredentialTypes()
        {
//                return new String[]{NamePasswordCredentials.TYPE_IDENTIFIER};
                return new String[]{"NameAndPasswordCredentials"};
        }
}