iframe 预览
json
{
"pdf": {
"PDF.js": "/pdf.js/web/viewer.html?file=$e_url"
},
"epub": {
"epub.js": "/resource/epubjs/viewer.html?url=$e_url"
},
"obj,3ds,stl,ply": {
"kkFileView": "http://127.0.0.1:8012/onlinePreview?url=$eb_url"
}
}