//mime 文件类型字典 
const getFileMime = function(mimeStr){
	let mime = {
		"audio/aac": "aac",
		"application/x-abiword": "abw",
		"application/x-freearc": "arc",
		"video/x-msvideo": "avi",
		"application/vnd.amazon.ebook": "azw",
		"application/octet-stream": "bin",
		"image/bmp": "bmp",
		"application/x-bzip": "bz",
		"application/x-bzip2": "bz2",
		"application/x-csh": "csh",
		"text/css": "css",
		"text/csv": "csv",
		"application/msword": "doc",
		"application/vnd.openxmlformats-officedocument.wordprocessingml.document": "docx",
		"application/vnd.ms-fontobject": "eot",
		"application/epub+zip": "epub",
		"image/gif": "gif",
		"text/html": "htm,html",
		"image/vnd.microsoft.icon": "ico",
		"text/calendar": "ics",
		"application/java-archive": "jar",
		"image/jpeg": "jpeg,jpg",
		"text/javascript": "mjs",
		"application/json": "json",
		"application/ld+json": "jsonld",
		"audio/midiaudio/x-midi": "mid,midi",
		"audio/mpeg": "mp3",
		"video/mpeg": "mpeg",
		"application/vnd.apple.installer+xml": "mpkg",
		"application/vnd.oasis.opendocument.presentation": "odp",
		"application/vnd.oasis.opendocument.spreadsheet": "ods",
		"application/vnd.oasis.opendocument.text": "odt",
		"audio/ogg": "oga",
		"video/ogg": "ogv",
		"application/ogg": "ogx",
		"font/otf": "otf",
		"image/png": "png",
		"application/pdf": "pdf",
		"application/vnd.ms-powerpoint": "ppt",
		"application/vnd.openxmlformats-officedocument.presentationml.presentation": "pptx",
		"application/x-rar-compressed": "rar",
		"application/rtf": "rtf",
		"application/x-sh": "sh",
		"image/svg+xml": "svg",
		"application/x-shockwave-flash": "swf",
		"application/x-tar": "tar",
		"image/tiff": "tif,tiff",
		"font/ttf": "ttf",
		"text/plain": "txt",
		"application/vnd.visio": "vsd",
		"audio/wav": "wav",
		"audio/webm": "weba",
		"video/webm": "webm",
		"image/webp": "webp",
		"font/woff": "woff",
		"font/woff2": "woff2",
		"application/xhtml+xml": "xhtml",
		"application/vnd.ms-excel": "xls",
		"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet": "xlsx",
		"application/xml": "xml",
		"application/vnd.mozilla.xul+xml": "xul",
		"application/zip": "zip",
		"video/3gppaudio/3gpp": "3gp",
		"video/3gpp2audio/3gpp2": "3g2",
		"application/x-7z-compressed": "7z"
	}
	let res = ''
	if(mimeStr){
		for(let x in mime){
			if(x==mimeStr){
				console.log('file-mime',x,mime[x],mimeStr);
				if(mime[x]){
					res = mime[x]
				}
			}
		}
	}
	console.log('file-mime-res@@',res);
	return res
}