Note: Baidu webshell detect isn't a good tools.

requestBaiduWebshelldetect.js

var fs = require("fs");
var request = require("request");


filepath = '';

var upload = { method: 'POST',
  url: 'https://scanner.baidu.com/enqueue',
  formData: 
   { archive: 
      { value: fs.createReadStream(filepath) ,
        options: 
         { filename: filepath,
           contentType: null } } } };

request(upload, function (error, response, body) {
  if (error) throw new Error(error);
  body = JSON.parse(body);
  if (body.error == false) {    
    var detectres = {
      method: 'GET',
      url: body.url
    };

    request(detectres, function (error, response, body) {
      if (error) throw new Error(error);
      return body;
    });
   
  }else{
     return null;
   }
});