五、缓存文件,还不够详细,用我这个jpeg, jpg, png, gif, bmp, ico, svg, tif, tiff, css, js, htm, html, ttf, otf, webp, woff, txt, csv, rtf, doc, docx, xls, xlsx, ppt, pptx, odf, odp, ods, odt, pdf, psd, ai, eot, eps, ps, zip, tar, tgz, gz, rar, bz2, 7z, aac, m4a, mp3, mp4, ogg, wav, wma, 3gp, avi, flv, m4v, mkv, mov, mpeg, mpg, wmv, exe, iso, dmg, swf
