Java 实现Proxy问题【续】

纠结了好几天发现原来客户端在请求数据的时候发送了xml格式的数据，在服务器端进行转发的时候同时需要转发这些请求数据，然后才能得到正确的响应数据。下面对之前的代码进行了修改

package org.proxy.servlet;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.PostMethod;

public class Proxy extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType(request.getContentType());
		request.setCharacterEncoding("UTF-8");
		String query = request.getParameter("url");
		
		PostMethod post = new PostMethod(query);
		post.setRequestBody(request.getInputStream());
		post.setRequestContentLength(request.getContentLength());
		post.setRequestHeader("Content-type", "text/xml; charset=UTF-8");
		
		HttpClient client = new HttpClient();
		client.executeMethod(post);
		PrintWriter out = response.getWriter();
		try{
			BufferedInputStream in = new BufferedInputStream(post.getResponseBodyAsStream());
			int item;
			while((item = in.read())!=-1){
				out.print((char)item);
				
			}
			out.flush();
			in.close();
			out.close();
			
		}catch(IOException e){
			response.sendError(HttpServletResponse.SC_NOT_FOUND, "Exception:"+e);
		}
	}

	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType(request.getContentType());
		request.setCharacterEncoding("UTF-8");
		String query = request.getParameter("url");
		
		PostMethod post = new PostMethod(query);
		post.setRequestBody(request.getInputStream());
		post.setRequestContentLength(request.getContentLength());
		post.setRequestHeader("Content-type", "text/xml; charset=UTF-8");
		
		HttpClient client = new HttpClient();
		client.executeMethod(post);
		PrintWriter out = response.getWriter();
		try{
			BufferedInputStream in = new BufferedInputStream(post.getResponseBodyAsStream());
			int item;
			while((item = in.read())!=-1){
				out.print((char)item);
				
			}
			out.flush();
			in.close();
			out.close();
			
		}catch(IOException e){
			response.sendError(HttpServletResponse.SC_NOT_FOUND, "Exception:"+e);
		}
	}
	

}

 

评论

1 楼 peterxq181 2010-12-31  

你好，看了你的关于openlayers proxy的文章后。我把servlet类也写好了
js里的那个OpenLayers.ProxyHost = "Proxy?url=";  也加上了
但是为什么还是调用不到wfs里的数据呢。
servlet映射也是绝对没问题的
我通过地址栏直接访问网站里的Proxy?url=http://localhost:8081/geoserver/wfs?request=GetFeature
确实可以返回GML文档的啊