常见文件格式类型

//.jpg .jpeg .gif .ai .pdg

//.AVI, .wma, .rmvb,.rm, .flash,.mp4,.mid, 3GP

var MIMETYPE = {
    ".3gp" : "video/3gpp",
    ".apk" : "application/vnd.android.package-archive",
    ".asf" : "video/x-ms-asf",
    ".avi" : "video/x-msvideo",
    ".bin" : "application/octet-stream",
    ".bmp" : "image/bmp",
    ".c" : "text/plain",
    ".class" : "application/octet-stream",
    ".conf" : "text/plain",
    ".cpp" : "text/plain",
    ".doc" : "application/msword",
    ".docx" : "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    ".xls" : "application/vnd.ms-excel",
    ".xlsx" : "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    ".exe" : "application/octet-stream",
    ".gif" : "image/gif",
    ".gtar" : "application/x-gtar",
    ".gz" : "application/x-gzip",
    ".h" : "text/plain",
    ".htm" : "text/html",
    ".html" : "text/html",
    ".jar" : "application/java-archive",
    ".java" : "text/plain",
    ".jpeg" : "image/jpeg",
    ".jpg" : "image/jpeg",
    ".js" : "application/x-javascript",
    ".log" : "text/plain",
    ".m3u" : "audio/x-mpegurl",
    ".m4a" : "audio/mp4a-latm",
    ".m4b" : "audio/mp4a-latm",
    ".m4p" : "audio/mp4a-latm",
    ".m4u" : "video/vnd.mpegurl",
    ".m4v" : "video/x-m4v",
    ".mov" : "video/quicktime",
    ".mp2" : "audio/x-mpeg",
    ".mp3" : "audio/x-mpeg",
    ".mp4" : "video/mp4",
    ".mpc" : "application/vnd.mpohun.certificate",
    ".mpe" : "video/mpeg",
    ".mpeg" : "video/mpeg",
    ".mpg" : "video/mpeg",
    ".mpg4" : "video/mp4",
    ".mpga" : "audio/mpeg",
    ".msg" : "application/vnd.ms-outlook",
    ".ogg" : "audio/ogg",
    ".pdf" : "application/pdf",
    ".png" : "image/png",
    ".pps" : "application/vnd.ms-powerpoint",
    ".ppt" : "application/vnd.ms-powerpoint",
    ".pptx" : "application/vnd.openxmlformats-officedocument.presentationml.presentation",
    ".prop" : "text/plain",
    ".rc" : "text/plain",
    ".rmvb" : "audio/x-pn-realaudio",
    ".rtf" : "application/rtf",
    ".sh" : "text/plain",
    ".tar" : "application/x-tar",
    ".tgz" : "application/x-compressed",
    ".txt" : "text/plain",
    ".wav" : "audio/x-wav",
    ".wma" : "audio/x-ms-wma",
    ".wmv" : "audio/x-ms-wmv",
    ".wps" : "application/vnd.ms-works",
    ".xml" : "text/plain",
    ".z" : "application/x-compress",
    ".zip" : "application/x-zip-compressed",
    "" : "*/*"
};

function getMIMETYPE(path){
    //.zip
    var type = path.substr(path.lastIndexOf(".")).toLowerCase();
    return MIMETYPE[type];
    
}