Wechat applet live broadcast plug-in -- get temporary files (background integrated applet live broadcast)

package com.ruoyi.web.controller.api.liveimg_wx;

import com.fasterxml.jackson.core.JsonParser;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HttpContext;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

public class utils {

    static String token="58_AzlN4Kc7ZcvNb6628Hwe7a8HeQD6xI2rW4xB16x4eTNfV8CTBop0_oGuWTHCH3m95voDRkhVTbfy5QTizijiZicKVI4X8nzMUFHicbYsT-_oQrLG-Jc3rRa8Ia2jPhCsWhJ9ooO4sqY0hcu-YBYhABALOL";
    public static void main(String[] args) throws IOException {
        String filePath = "D:\\Pictures\\logo.jpg";
        String sendUrl = "https://api.weixin.qq.com/cgi-bin/media/upload?access_token="+token+"&type=image";
        String result = null;
        utils fileUpload = new utils();
        result = fileUpload.send(sendUrl, filePath);
        System.out.println(result);
    }




    /**
     *  simulation form The form of the form  , Upload files   Write the file as an output stream to url in , Then use the input stream to get url Response 
     *
     * @param url       Request address  form Forms url Address 
     * @param filePath  The file is saved in the server path 
     * @return String url Response information return value 
     */
    public String send(String url, String filePath) throws IOException {
        String result = null;
        File file = new File(filePath);
        if (!file.exists() || !file.isFile()) {
            throw new IOException(" file does not exist ");
        }


/**
 *  The first part 
 */
        URL urlObj = new URL(url);
//  Connect 
        HttpURLConnection con = (HttpURLConnection) urlObj.openConnection();


/**
 *  Set key value 
 */
        con.setRequestMethod("POST"); //  With Post Submit form by , Default get The way 
        con.setDoInput(true);
        con.setDoOutput(true);
        con.setUseCaches(false); // post Method cannot use cache 


//  Set the request header information 
        con.setRequestProperty("Connection", "Keep-Alive");
        con.setRequestProperty("Charset", "UTF-8");


//  Set boundaries 
        String BOUNDARY = "----------" + System.currentTimeMillis();
        con.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);


//  Request body information 


//  The first part ：
        StringBuilder sb = new StringBuilder();
        sb.append("--"); //  There must be two more lines 
        sb.append(BOUNDARY);
        sb.append("\r\n");
        sb.append("Content-Disposition: form-data;name=\"file\";filename=\""
                + file.getName() + "\"\r\n");
        sb.append("Content-Type:application/octet-stream\r\n\r\n");


        byte[] head = sb.toString().getBytes("utf-8");


//  Get the output stream 
        OutputStream out = new DataOutputStream(con.getOutputStream());
//  Output header 
        out.write(head);


//  The main body of the document 
//  The way the file has been streamed   Push to url in 
        DataInputStream in = new DataInputStream(new FileInputStream(file));
        int bytes = 0;
        byte[] bufferOut = new byte[1024];
        while ((bytes = in.read(bufferOut)) != -1) {
            out.write(bufferOut, 0, bytes);
        }
        in.close();


//  The ending part 
        byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");//  Define the last data separator 


        out.write(foot);


        out.flush();
        out.close();


        StringBuffer buffer = new StringBuffer();
        BufferedReader reader = null;
        try {
//  Definition BufferedReader Input stream to read URL Response 
            reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String line = null;
            while ((line = reader.readLine()) != null) {
//System.out.println(line);
                buffer.append(line);
            }
            if (result == null) {
                result = buffer.toString();
            }
        } catch (IOException e) {
            System.out.println(" send out POST Exception in request ！" + e);
            e.printStackTrace();
            throw new IOException(" Data reading exception ");
        } finally {
            if (reader != null) {
                reader.close();
            }

        }
        return result;
    }
}