package com.bonc.mine.common.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.zip.GZIPInputStream;

/**
 * Created on 2022/3/16.
 *
 * @author lichuanming
 *
 * 发送 get请求，针对gizp
 */
public class SendGetUntil {
  public static String sendGet(String url) {
    StringBuffer stringBuffer = new StringBuffer();
    try {
      URL realUrl = new URL(url);

      HttpURLConnection httpURLConnection = (HttpURLConnection) realUrl.openConnection();
      //在这里设置一些属性，详细见UrlConnection文档，HttpURLConnection是UrlConnection的子类
      //设置连接超时为5秒
      httpURLConnection.setConnectTimeout(5000);
      //设定请求方式(默认为get)
      httpURLConnection.setRequestMethod("GET");
      httpURLConnection.setRequestProperty("accept", "*/*");
      httpURLConnection.setRequestProperty("Accept-Charset", "UTF-8");
      httpURLConnection.setRequestProperty("contentType", "UTF-8");
      httpURLConnection.setRequestProperty("Content-type", "application/x-www-form-urlencoded;charset=UTF-8");
      //建立到远程对象的实际连接
      httpURLConnection.connect();
      GZIPInputStream gZIPInputStream = null;
      String encoding = httpURLConnection.getContentEncoding();
      if(encoding.equals("gzip")){
        gZIPInputStream = new GZIPInputStream(httpURLConnection.getInputStream());
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(gZIPInputStream));
        String line = null;
        while ((line = bufferedReader.readLine()) != null) {
          //转化为UTF-8的编码格式
          line = new String(line.getBytes("UTF-8"));
          stringBuffer.append(line);
        }
        bufferedReader.close();
      }else{
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));
        String line = null;
        while ((line = bufferedReader.readLine()) != null) {
          //转化为UTF-8的编码格式
          line = new String(line.getBytes("UTF-8"));
          stringBuffer.append(line);
        }
        bufferedReader.close();
      }
      //返回打开连接读取的输入流，输入流转化为StringBuffer类型，这一套流程要记住，常用


      httpURLConnection.disconnect();
    } catch (MalformedURLException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return stringBuffer.toString();
  }
}