redirectdemo.java~10~

来自「这是用JAVA的SOCKET类实现的HTTP CLIENT的代码。通过它可以让原」· JAVA~10~ 代码 · 共 86 行

package org.apache.commons.httpclient.demo;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.methods.GetMethod;
import java.io.*;

public class RedirectDemo {
    public static void main(String[] args) {
        HttpClient client = new HttpClient();
        //设置代理服务器地址和端口
        client.getHostConfiguration().setProxy("90.0.12.21", 808);
        client.getHostConfiguration().setHost("www.imobile.com.cn", 80, "http");

        PostMethod post = new PostMethod("/search2005.php");

        try {
            client.executeMethod(post);
        } catch (IOException ex) {
        }

        System.out.println(post.getStatusLine().toString());

        post.releaseConnection();

        //检查是否重定向

        int statuscode = post.getStatusCode();
/*
         状态码
          对应HttpServletResponse的常量
          详细描述

         301
          SC_MOVED_PERMANENTLY
          页面已经永久移到另外一个新地址

         302
          SC_MOVED_TEMPORARILY
          页面暂时移动到另外一个新的地址

         303
          SC_SEE_OTHER
          客户端请求的地址必须通过另外的URL来访问

         307
          SC_TEMPORARY_REDIRECT
          同SC_MOVED_TEMPORARILY
*/
        System.out.println("检查是否重定向的代码："+statuscode);
        System.out.println("HttpStatus.SC_MOVED_TEMPORARILY："+HttpStatus.SC_MOVED_TEMPORARILY);
        System.out.println("HttpStatus.SC_MOVED_PERMANENTLY："+HttpStatus.SC_MOVED_PERMANENTLY);
        System.out.println("HttpStatus.SC_SEE_OTHER："+HttpStatus.SC_SEE_OTHER);
        System.out.println("HttpStatus.SC_TEMPORARY_REDIRECT："+HttpStatus.SC_TEMPORARY_REDIRECT);
        if ((statuscode == HttpStatus.SC_MOVED_TEMPORARILY) ||
            (statuscode == HttpStatus.SC_MOVED_PERMANENTLY) ||
            (statuscode == HttpStatus.SC_SEE_OTHER) ||
            (statuscode == HttpStatus.SC_TEMPORARY_REDIRECT)) {

            //读取新的URL地址
            Header header = post.getResponseHeader("location");
            if (header != null) {
                String newuri = header.getValue();
                if ((newuri == null) || (newuri.equals(""))) {
                    newuri = "/";
                }

                GetMethod redirect = new GetMethod(newuri);

                try {
                    client.executeMethod(redirect);
                } catch (IOException ex1) {
                }

                System.out.println("Redirect:" +redirect.getStatusLine().toString());

                redirect.releaseConnection();
            } else {
                System.out.println("Invalid redirect");
            }
        }
    }
}