Extension MIME Type
.xlsx? application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.xltx? application/vnd.openxmlformats-officedocument.spreadsheetml.template
.potx? application/vnd.openxmlformats-officedocument.presentationml.template
.ppsx? application/vnd.openxmlformats-officedocument.presentationml.slideshow
.pptx? application/vnd.openxmlformats-officedocument.presentationml.presentation
.sldx? application/vnd.openxmlformats-officedocument.presentationml.slide
.docx? application/vnd.openxmlformats-officedocument.wordprocessingml.document
.dotx? application/vnd.openxmlformats-officedocument.wordprocessingml.template
.xlsm? application/vnd.ms-excel.addin.macroEnabled.12
.xlsb? application/vnd.ms-excel.sheet.binary.macroEnabled.12
所有圖片，視頻，大部分文檔
accept="image/*"
accept="video/*"
?accept="text/*,application/*"
