人才引进公示抓包

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最近在弄人才引进入户广州事宜，资料已经提交上去了，但不知啥时候才到公示，也不知自己在第几页，所以闲来无事写了一个查询脚本，一运行很快就知道自己有没有在公示了。

人才引进名单公示：
http://www.hrssgz.gov.cn/vsgzpiapp01/GZPI/Gateway/PersonIntroducePublicity.aspx

第一步右键查看网页源码：

第二步：使用fiddler抓包工具进行抓包分析

发现如下参数：

第三步：编写Java脚本

代码如下：

package com.pk4pk.inline;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

/**
 * 
 * @Author pk4pk
 * @Email [email protected]
 * @Date 2017年9月13日
 * @TODO 人才引进查找是否有我
 */
public class FindMe {
    private final static String url="http://www.hrssgz.gov.cn/vsgzpiapp01/GZPI/Gateway/PersonIntroducePublicity.aspx";
    private static String view_state = "";
    public static void main(String[] args) throws IOException, InterruptedException {
        // TODO Auto-generated method stub
        int pageIndex = 0;
        while (true) {
            System.out.println("没有找到。。。。");
            if (getHttpString(pageIndex).contains("<td>这里输入你的名字</td>")) {

                break;
            }
            pageIndex++;
            Thread.sleep(1000 * 3);
        }
        System.out.println("已经找到。。。。");
    }

    /**
     * Post请求获取内容
     * @param page
     * @return
     * @throws IOException
     */
    private static String getHttpString(int page) throws IOException {
        System.out.println("page :" + page);
        CloseableHttpClient httpclient = HttpClients.createDefault();
        try {
            HttpPost httpPost = new HttpPost(url);
            if(page!=0){
                List<NameValuePair> nvps = new ArrayList<NameValuePair>();
                nvps.add(new BasicNameValuePair("__EVENTTARGET", "NextLBtn"));
                nvps.add(new BasicNameValuePair("__EVENTARGUMENT", ""));
                nvps.add(new BasicNameValuePair("__VIEWSTATE", view_state));
                nvps.add(new BasicNameValuePair("__VIEWSTATEGENERATOR", "3C84D956"));
                nvps.add(new BasicNameValuePair("ToPage", "" + page));
                httpPost.setEntity(new UrlEncodedFormEntity(nvps));
                System.out.println("Executing request " + httpPost.getRequestLine());
            }

            // Create a custom response handler
            ResponseHandler<String> responseHandler = new ResponseHandler<String>() {

                @Override
                public String handleResponse(final HttpResponse response) throws ClientProtocolException, IOException {
                    int status = response.getStatusLine().getStatusCode();
                    if (status >= 200 && status < 300) {
                        HttpEntity entity = response.getEntity();
                        return entity != null ? EntityUtils.toString(entity) : null;
                    } else {
                        throw new ClientProtocolException("Unexpected response status: " + status);
                    }
                }

            };
            String responseBody = httpclient.execute(httpPost, responseHandler);
            String resultResponseBody =responseBody;
            System.out.println("-----------------page :"+page+"-----------------------");
            System.out.println(responseBody);


            //截取__VIEWSTATE的值
            int index = responseBody.indexOf("<input type=\"hidden\" name=\"__VIEWSTATE\" id=\"__VIEWSTATE\" value=\"");
            System.out.println("index :" + index);
            responseBody=responseBody.substring(index+64, responseBody.length());
            int endIndex=responseBody.indexOf("\"");
            System.out.println("endIndex :" + endIndex);
            view_state=responseBody.substring(0,endIndex);
            System.out.println("view_state :"+view_state);

            return resultResponseBody;
        } finally {
            httpclient.close();
        }

    }

}

总结：关键要耐心和仔细分析抓包的数据，就像上面的__VIEWSTATE值，一开始以为只要改下ToPage字段就可以了，发现请求下来的都是同一页数据，后面再看网页源码才发现原来还需要_VIEWSTATE 值