让Resin HttpProxyServlet支持多域名

一般应用中有ajax进行跨子域代理调用时，通常需要设置HTTP代理，解决域的权限问题。BSD爱好者乐园e,z+jmC_
举例，blog.chinajavaworld.com中用ajax调search子系统的服务，Resin的HttpProxyServlet设置如下：BSD爱好者乐园6uL7CHNl!o4s([

  http-proxy
  com.caucho.servlets.HttpProxyServlet
  'search.chinajavaworld.com:80'/>
 
 
"/ajax/search/*"servlet-name="http-proxy"/>

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在search.chinajavaworld.com/ajax/search/test.jsp中
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<%out.print(request.getHeader("Host"));%>

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http://blog.chinajavaworld.com/ajax/search/test.jsp，输出：
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search.chinajavaworld.com

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L*CO(j当应用要支持访问时，问题来了：BSD爱好者乐园4f0Nlb w0v7Z.i$s'u
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6N"I5B4hRHh*O1o如用 http://blog.chinajavaworld-bbb.com/ajax/search/test.jsp 进行访问，输出也是：BSD爱好者乐园y;O)K0aj)ZW
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search.chinajavaworld.com

r&l;o&ak如果设置两个host
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  http-proxy
  com.caucho.servlets.HttpProxyServlet
  'search.chinajavaworld.com:80'/>
  'search.chinajavaworld-bbb.com:80'/>

aE-@|\#U则用两个域名访问的话，都将输出：BSD爱好者乐园O.yo8K GJq

search.chinajavaworld-bbb.com

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解决方法：修改 HttpProxyServlet 源码：
h;E];Q ik"y-DTcpPool.java加入以下方法：
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Server bestServer =null;BSD爱好者乐园0P+u+K^ y(m,T'b:l?
synchronized(this){BSD爱好者乐园 R.cz'k_)u@
String _URL =null;
IGG/|*y\e |for(inti = 0; i < _servers.length; i++){BSD爱好者乐园:S` d FGdqPN
Server server = _servers[i];BSD爱好者乐园/I
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if(server.getURL().indexOf(mainHost) != -1){
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k D;h$fyK]//System.out.println("ok,found host.return server.");BSD爱好者乐园Gj9nO.edm z
bestServer = server;BSD爱好者乐园*CF ~ `/yB
break;
ps
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@Q9`#Y$V0kif(i == _servers.length - 1) _URL = server.getURL();}BSD爱好者乐园i*u8l A%eUqjm
if(bestServer ==null){

B4v&CH6\N'Xr Sw@//System.out.println(mainHost+" is not in server list. add now.");
.M2Lju)\Ts-n5TString oldMainHost = getMainDomain(_URL);
\d|,lU R_URL = _URL.replace(oldMainHost, mainHost);
S.}(i8bf&e,ch YO'I'RString _host = getDomain(_URL);BSD爱好者乐园+x#rQ| JS9[ q
bestServer =Server(_host);
_ Wa*l5c yA_hosts.add(_host);
2GL;h/{ \ yt0SServer[] servers =newServer[_servers.length + 1];
a`+~A#cd r3vSystem.arraycopy(_servers, 0, servers, 0, _servers.length);BSD爱好者乐园z[p#Jw d.B1Kk
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servers[_servers.length] = bestServer;
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B(L^ u_servers = servers;
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returnbestServer;BSD爱好者乐园u Ej
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HttpProxyServlet中加入：BSD爱好者乐园RCv1_Q9P9ku

r*w*BT+KString host = req.getHeader("Host");
;bc$w4f:dnN'["L#rString mainHost = TcpPool.getMainDomain(host);
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然后将
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TcpPool.Server server = _tcpPool.nextServer();
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I+\2EbT W.c/Q{TcpPool.Server server = _tcpPool.nextServer(mainHost);BSD爱好者乐园%j [f\8l&}*T N8f/\