EPSDATA数据抓取

gistfile1.txt

/*
到数据查看界面选择好要查看的数据和时间
按下f12粘贴下面的代码然后回车
点击查询即可自动下载数据为csv格式
*/
(function() {
    function ajaxEventTrigger(event) {
     var ajaxEvent = new CustomEvent(event, { detail: this });
     window.dispatchEvent(ajaxEvent);
    }
    var oldXHR = window.XMLHttpRequest;
    const BOM = '\uFEFF' 
    function newXHR() {
     var realXHR = new oldXHR();
     realXHR.addEventListener('load', function () { ajaxEventTrigger.call(this, 'ajaxLoad'); }, false);
     return realXHR;
    }
    window.XMLHttpRequest = newXHR;
    window.addEventListener('ajaxLoad', function (e) {
       const req = e.detail;
       if (req.status !== 200){
           return;
       }
       if (req.responseURL.indexOf("/charts.do")!==-1){
        const rsp = req.response;
        const jsData = JSON.parse(rsp);
        window.d = jsData
        console.log(jsData);
        const title = jsData.yNames;
        const name = "导出数据";
        title.unshift("时间")
    
        const data = [];
        jsData.listData.forEach((i)=>{
            var iData =i.vals 
            iData.unshift(i.xName)
            data.push(i.vals)
        })
        var output = title.join() + '\n';
        data.forEach((i)=>{
            output += i.join()+'\n';
        })
        console.log(data);
        console.log(output);
        var blob = new Blob([BOM + output], {type: 'text/csv'})
        if (navigator.msSaveOrOpenBlob) {
          navigator.msSaveOrOpenBlob(blob, `${name}.csv`)
        } else {
          let downloadLink = document.createElement('a')
          downloadLink.setAttribute('href', URL.createObjectURL(blob)) 
          downloadLink.download = `${name}.csv`
          document.body.appendChild(downloadLink)
          downloadLink.click()
          document.body.removeChild(downloadLink)
        }
        }
       } );
   }
   )();