jpg doc docx pdf ppt pptx xlsx csv xls 这些所有文件类型的 mimetype

.jpg image/jpeg .doc application/msword .docx application/vnd.openxmlformats-officedocument.wordprocessingml.document .pdf application/pdf .ppt application/vnd.ms-powerpoint .pptx application/vnd.openxmlformats-officedocument.presentationml.presentation .xlsx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet .csv text/csv .xls application/vnd.ms-excel