不明白为何调用下载API，每次要缓存数据

手机刷root后，进入目录
/data/data/io.dcloud.HBuilder/shared_prefs/

查看这个HBuilder_download_dcloud.xml文件，发现我APP每次下载请求数据都在这个文件里面，这是为何？？

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<map>
<string name="dt111556801926292">{url: 'http://192.168.10.162:8081/cc/VerifyImage?c_SID=ILJRHPDVFPHNAKDXDSFOGPEBIOFcEPFY&amp;mac=null&amp;channel=1102&amp;responseFormat=JSON&amp;busCode=C0066001&amp;batchNo=undefined&amp;method: 'GET',priority: 10,timeout:120000000,retry:1,filename:'_downloads/tt/t.png',downloadedSize:1571,totalSize:0,state: 4,options:{&quot;data&quot;:{&quot;responseFormat&quot;:&quot;JSON&quot;,&quot;mac&quot;:null,&quot;EMP_SID&quot;:&quot;ILJRHPDtNAKDXDSFOGPEBIOFTHFBAIQEGEPFY&quot;,&quot;channel&quot;:&quot;1102&quot;,&quot;pdf2pic&quot;:&quot;1&quot;,&quot;busCode&quot;:&quot;C0066001&quot;},&quot;filename&quot;:&quot;_downloads\/tt\/t.png&quot;,&quot;method&quot;:&quot;GET&quot;,&quot;retry&quot;:1,&quot;retryInterval&quot;:120,&quot;timeout&quot;:120,&quot;priority&quot;:10},t:'null'}</string>
</map>
....

....很多很多