/* eslint-disable no-dupe-keys */
/**
 * Takes a file extension and returns it's MIME type
 * @param {string} fileName - file name including extension (example.pdf)
 * @returns {string} MIME Type
 */
function mimeType(fileName) {
    const mimeTypes = {
        '.3dm': 'x-world/x-3dmf',
        '.3dmf': 'x-world/x-3dmf',
        '.a': 'application/octet-stream',
        '.aab': 'application/x-authorware-bin',
        '.aam': 'application/x-authorware-map',
        '.aas': 'application/x-authorware-seg',
        '.abc': 'text/vnd.abc',
        '.acgi': 'text/html',
        '.afl': 'video/animaflex',
        '.ai': 'application/postscript',
        '.aif': 'audio/aiff',
        '.aif': 'audio/x-aiff',
        '.aifc': 'audio/aiff',
        '.aifc': 'audio/x-aiff',
        '.aiff': 'audio/aiff',
        '.aiff': 'audio/x-aiff',
        '.aim': 'application/x-aim',
        '.aip': 'text/x-audiosoft-intra',
        '.ani': 'application/x-navi-animation',
        '.aos': 'application/x-nokia-9000-communicator-add-on-software',
        '.aps': 'application/mime',
        '.arc': 'application/octet-stream',
        '.arj': 'application/arj',
        '.arj': 'application/octet-stream',
        '.art': 'image/x-jg',
        '.asf': 'video/x-ms-asf',
        '.asm': 'text/x-asm',
        '.asp': 'text/asp',
        '.asx': 'application/x-mplayer2',
        '.asx': 'video/x-ms-asf',
        '.asx': 'video/x-ms-asf-plugin',
        '.au': 'audio/basic',
        '.au': 'audio/x-au',
        '.avi': 'application/x-troff-msvideo',
        '.avi': 'video/avi',
        '.avi': 'video/msvideo',
        '.avi': 'video/x-msvideo',
        '.avs': 'video/avs-video',
        '.bcpio': 'application/x-bcpio',
        '.bin': 'application/mac-binary',
        '.bin': 'application/macbinary',
        '.bin': 'application/octet-stream',
        '.bin': 'application/x-binary',
        '.bin': 'application/x-macbinary',
        '.bm': 'image/bmp',
        '.bmp': 'image/bmp',
        '.bmp': 'image/x-windows-bmp',
        '.boo': 'application/book',
        '.book': 'application/book',
        '.boz': 'application/x-bzip2',
        '.bsh': 'application/x-bsh',
        '.bz': 'application/x-bzip',
        '.bz2': 'application/x-bzip2',
        '.c': 'text/plain',
        '.c': 'text/x-c',
        '.c++': 'text/plain',
        '.cat': 'application/vnd.ms-pki.seccat',
        '.cc': 'text/plain',
        '.cc': 'text/x-c',
        '.ccad': 'application/clariscad',
        '.cco': 'application/x-cocoa',
        '.cdf': 'application/cdf',
        '.cdf': 'application/x-cdf',
        '.cdf': 'application/x-netcdf',
        '.cer': 'application/pkix-cert',
        '.cer': 'application/x-x509-ca-cert',
        '.cha': 'application/x-chat',
        '.chat': 'application/x-chat',
        '.class': 'application/java',
        '.class': 'application/java-byte-code',
        '.class': 'application/x-java-class',
        '.com': 'application/octet-stream',
        '.com': 'text/plain',
        '.conf': 'text/plain',
        '.cpio': 'application/x-cpio',
        '.cpp': 'text/x-c',
        '.cpt': 'application/mac-compactpro',
        '.cpt': 'application/x-compactpro',
        '.cpt': 'application/x-cpt',
        '.crl': 'application/pkcs-crl',
        '.crl': 'application/pkix-crl',
        '.crt': 'application/pkix-cert',
        '.crt': 'application/x-x509-ca-cert',
        '.crt': 'application/x-x509-user-cert',
        '.csh': 'application/x-csh',
        '.csh': 'text/x-script.csh',
        '.css': 'application/x-pointplus',
        '.css': 'text/css',
        '.cxx': 'text/plain',
        '.dcr': 'application/x-director',
        '.deepv': 'application/x-deepv',
        '.def': 'text/plain',
        '.der': 'application/x-x509-ca-cert',
        '.dif': 'video/x-dv',
        '.dir': 'application/x-director',
        '.dl': 'video/dl',
        '.dl': 'video/x-dl',
        '.doc': 'application/msword',
        '.dot': 'application/msword',
        '.dp': 'application/commonground',
        '.drw': 'application/drafting',
        '.dump': 'application/octet-stream',
        '.dv': 'video/x-dv',
        '.dvi': 'application/x-dvi',
        '.dwf': 'drawing/x-dwf',
        '.dwf': 'model/vnd.dwf',
        '.dwg': 'application/acad',
        '.dwg': 'image/vnd.dwg',
        '.dwg': 'image/x-dwg',
        '.dxf': 'application/dxf',
        '.dxf': 'image/vnd.dwg',
        '.dxf': 'image/x-dwg',
        '.dxr': 'application/x-director',
        '.el': 'text/x-script.elisp',
        '.elc': 'application/x-bytecode.elisp',
        '.elc': 'application/x-elc',
        '.env': 'application/x-envoy',
        '.eps': 'application/postscript',
        '.es': 'application/x-esrehber',
        '.etx': 'text/x-setext',
        '.evy': 'application/envoy',
        '.evy': 'application/x-envoy',
        '.exe': 'application/octet-stream',
        '.f': 'text/plain',
        '.f': 'text/x-fortran',
        '.f77': 'text/x-fortran',
        '.f90': 'text/plain',
        '.f90': 'text/x-fortran',
        '.fdf': 'application/vnd.fdf',
        '.fif': 'application/fractals',
        '.fif': 'image/fif',
        '.fli': 'video/fli',
        '.fli': 'video/x-fli',
        '.flo': 'image/florian',
        '.flx': 'text/vnd.fmi.flexstor',
        '.fmf': 'video/x-atomic3d-feature',
        '.for': 'text/plain',
        '.for': 'text/x-fortran',
        '.fpx': 'image/vnd.fpx',
        '.fpx': 'image/vnd.net-fpx',
        '.frl': 'application/freeloader',
        '.funk': 'audio/make',
        '.g': 'text/plain',
        '.g3': 'image/g3fax',
        '.gif': 'image/gif',
        '.gl': 'video/gl',
        '.gl': 'video/x-gl',
        '.gsd': 'audio/x-gsm',
        '.gsm': 'audio/x-gsm',
        '.gsp': 'application/x-gsp',
        '.gss': 'application/x-gss',
        '.gtar': 'application/x-gtar',
        '.gz': 'application/x-compressed',
        '.gz': 'application/x-gzip',
        '.gzip': 'application/x-gzip',
        '.gzip': 'multipart/x-gzip',
        '.h': 'text/plain',
        '.h': 'text/x-h',
        '.hdf': 'application/x-hdf',
        '.help': 'application/x-helpfile',
        '.hgl': 'application/vnd.hp-hpgl',
        '.hh': 'text/plain',
        '.hh': 'text/x-h',
        '.hlb': 'text/x-script',
        '.hlp': 'application/hlp',
        '.hlp': 'application/x-helpfile',
        '.hlp': 'application/x-winhelp',
        '.hpg': 'application/vnd.hp-hpgl',
        '.hpgl': 'application/vnd.hp-hpgl',
        '.hqx': 'application/binhex',
        '.hqx': 'application/binhex4',
        '.hqx': 'application/mac-binhex',
        '.hqx': 'application/mac-binhex40',
        '.hqx': 'application/x-binhex40',
        '.hqx': 'application/x-mac-binhex40',
        '.hta': 'application/hta',
        '.htc': 'text/x-component',
        '.htm': 'text/html',
        '.html': 'text/html',
        '.htmls': 'text/html',
        '.htt': 'text/webviewhtml',
        '.htx': 'text/html',
        '.ice': 'x-conference/x-cooltalk',
        '.ico': 'image/x-icon',
        '.idc': 'text/plain',
        '.ief': 'image/ief',
        '.iefs': 'image/ief',
        '.iges': 'application/iges',
        '.iges': 'model/iges',
        '.igs': 'application/iges',
        '.igs': 'model/iges',
        '.ima': 'application/x-ima',
        '.imap': 'application/x-httpd-imap',
        '.inf': 'application/inf',
        '.ins': 'application/x-internett-signup',
        '.ip': 'application/x-ip2',
        '.isu': 'video/x-isvideo',
        '.it': 'audio/it',
        '.iv': 'application/x-inventor',
        '.ivr': 'i-world/i-vrml',
        '.ivy': 'application/x-livescreen',
        '.jam': 'audio/x-jam',
        '.jav': 'text/plain',
        '.jav': 'text/x-java-source',
        '.java': 'text/plain',
        '.java': 'text/x-java-source',
        '.jcm': 'application/x-java-commerce',
        '.jfif': 'image/jpeg',
        '.jfif-tbnl': 'image/jpeg',
        '.jpe': 'image/jpeg',
        '.jpeg': 'image/jpeg',
        '.jpg': 'image/jpeg',
        '.jps': 'image/x-jps',
        '.js': 'application/x-javascript',
        '.jut': 'image/jutvision',
        '.kar': 'audio/midi',
        '.kar': 'music/x-karaoke',
        '.ksh': 'application/x-ksh',
        '.ksh': 'text/x-script.ksh',
        '.la': 'audio/nspaudio',
        '.la': 'audio/x-nspaudio',
        '.lam': 'audio/x-liveaudio',
        '.latex': 'application/x-latex',
        '.lha': 'application/lha',
        '.lha': 'application/octet-stream',
        '.lha': 'application/x-lha',
        '.lhx': 'application/octet-stream',
        '.list': 'text/plain',
        '.lma': 'audio/nspaudio',
        '.lma': 'audio/x-nspaudio',
        '.log': 'text/plain',
        '.lsp': 'application/x-lisp',
        '.lsp': 'text/x-script.lisp',
        '.lst': 'text/plain',
        '.lsx': 'text/x-la-asf',
        '.ltx': 'application/x-latex',
        '.lzh': 'application/octet-stream',
        '.lzh': 'application/x-lzh',
        '.lzx': 'application/lzx',
        '.lzx': 'application/octet-stream',
        '.lzx': 'application/x-lzx',
        '.m': 'text/plain',
        '.m': 'text/x-m',
        '.m1v': 'video/mpeg',
        '.m2a': 'audio/mpeg',
        '.m2v': 'video/mpeg',
        '.m3u': 'audio/x-mpequrl',
        '.man': 'application/x-troff-man',
        '.map': 'application/x-navimap',
        '.mar': 'text/plain',
        '.mbd': 'application/mbedlet',
        '.mc$': 'application/x-magic-cap-package-1.0',
        '.mcd': 'application/mcad',
        '.mcd': 'application/x-mathcad',
        '.mcf': 'image/vasa',
        '.mcf': 'text/mcf',
        '.mcp': 'application/netmc',
        '.me': 'application/x-troff-me',
        '.mht': 'message/rfc822',
        '.mhtml': 'message/rfc822',
        '.mid': 'application/x-midi',
        '.mid': 'audio/midi',
        '.mid': 'audio/x-mid',
        '.mid': 'audio/x-midi',
        '.mid': 'music/crescendo',
        '.mid': 'x-music/x-midi',
        '.midi': 'application/x-midi',
        '.midi': 'audio/midi',
        '.midi': 'audio/x-mid',
        '.midi': 'audio/x-midi',
        '.midi': 'music/crescendo',
        '.midi': 'x-music/x-midi',
        '.mif': 'application/x-frame',
        '.mif': 'application/x-mif',
        '.mime': 'message/rfc822',
        '.mime': 'www/mime',
        '.mjf': 'audio/x-vnd.audioexplosion.mjuicemediafile',
        '.mjpg': 'video/x-motion-jpeg',
        '.mm': 'application/base64',
        '.mm': 'application/x-meme',
        '.mme': 'application/base64',
        '.mod': 'audio/mod',
        '.mod': 'audio/x-mod',
        '.moov': 'video/quicktime',
        '.mov': 'video/quicktime',
        '.movie': 'video/x-sgi-movie',
        '.mp2': 'audio/mpeg',
        '.mp2': 'audio/x-mpeg',
        '.mp2': 'video/mpeg',
        '.mp2': 'video/x-mpeg',
        '.mp2': 'video/x-mpeq2a',
        '.mp3': 'audio/mpeg3',
        '.mp3': 'audio/x-mpeg-3',
        '.mp3': 'video/mpeg',
        '.mp3': 'video/x-mpeg',
        '.mpa': 'audio/mpeg',
        '.mpa': 'video/mpeg',
        '.mpc': 'application/x-project',
        '.mpe': 'video/mpeg',
        '.mpeg': 'video/mpeg',
        '.mpg': 'audio/mpeg',
        '.mpg': 'video/mpeg',
        '.mpga': 'audio/mpeg',
        '.mpp': 'application/vnd.ms-project',
        '.mpt': 'application/x-project',
        '.mpv': 'application/x-project',
        '.mpx': 'application/x-project',
        '.mrc': 'application/marc',
        '.ms': 'application/x-troff-ms',
        '.mv': 'video/x-sgi-movie',
        '.my': 'audio/make',
        '.mzz': 'application/x-vnd.audioexplosion.mzz',
        '.nap': 'image/naplps',
        '.naplps': 'image/naplps',
        '.nc': 'application/x-netcdf',
        '.ncm': 'application/vnd.nokia.configuration-message',
        '.nif': 'image/x-niff',
        '.niff': 'image/x-niff',
        '.nix': 'application/x-mix-transfer',
        '.nsc': 'application/x-conference',
        '.nvd': 'application/x-navidoc',
        '.o': 'application/octet-stream',
        '.oda': 'application/oda',
        '.omc': 'application/x-omc',
        '.omcd': 'application/x-omcdatamaker',
        '.omcr': 'application/x-omcregerator',
        '.p': 'text/x-pascal',
        '.p10': 'application/pkcs10',
        '.p10': 'application/x-pkcs10',
        '.p12': 'application/pkcs-12',
        '.p12': 'application/x-pkcs12',
        '.p7a': 'application/x-pkcs7-signature',
        '.p7c': 'application/pkcs7-mime',
        '.p7c': 'application/x-pkcs7-mime',
        '.p7m': 'application/pkcs7-mime',
        '.p7m': 'application/x-pkcs7-mime',
        '.p7r': 'application/x-pkcs7-certreqresp',
        '.p7s': 'application/pkcs7-signature',
        '.part': 'application/pro_eng',
        '.pas': 'text/pascal',
        '.pbm': 'image/x-portable-bitmap',
        '.pcl': 'application/vnd.hp-pcl',
        '.pcl': 'application/x-pcl',
        '.pct': 'image/x-pict',
        '.pcx': 'image/x-pcx',
        '.pdb': 'chemical/x-pdb',
        '.pdf': 'application/pdf',
        '.pfunk': 'audio/make',
        '.pfunk': 'audio/make.my.funk',
        '.pgm': 'image/x-portable-graymap',
        '.pgm': 'image/x-portable-greymap',
        '.pic': 'image/pict',
        '.pict': 'image/pict',
        '.pkg': 'application/x-newton-compatible-pkg',
        '.pko': 'application/vnd.ms-pki.pko',
        '.pl': 'text/plain',
        '.pl': 'text/x-script.perl',
        '.plx': 'application/x-pixclscript',
        '.pm': 'image/x-xpixmap',
        '.pm': 'text/x-script.perl-module',
        '.pm4': 'application/x-pagemaker',
        '.pm5': 'application/x-pagemaker',
        '.png': 'image/png',
        '.pnm': 'application/x-portable-anymap',
        '.pnm': 'image/x-portable-anymap',
        '.pot': 'application/mspowerpoint',
        '.pot': 'application/vnd.ms-powerpoint',
        '.pov': 'model/x-pov',
        '.ppa': 'application/vnd.ms-powerpoint',
        '.ppm': 'image/x-portable-pixmap',
        '.pps': 'application/mspowerpoint',
        '.pps': 'application/vnd.ms-powerpoint',
        '.ppt': 'application/mspowerpoint',
        '.ppt': 'application/powerpoint',
        '.ppt': 'application/vnd.ms-powerpoint',
        '.ppt': 'application/x-mspowerpoint',
        '.ppz': 'application/mspowerpoint',
        '.pre': 'application/x-freelance',
        '.prt': 'application/pro_eng',
        '.ps': 'application/postscript',
        '.psd': 'application/octet-stream',
        '.pvu': 'paleovu/x-pv',
        '.pwz': 'application/vnd.ms-powerpoint',
        '.py': 'text/x-script.phyton',
        '.pyc': 'applicaiton/x-bytecode.python',
        '.qcp': 'audio/vnd.qcelp',
        '.qd3': 'x-world/x-3dmf',
        '.qd3d': 'x-world/x-3dmf',
        '.qif': 'image/x-quicktime',
        '.qt': 'video/quicktime',
        '.qtc': 'video/x-qtc',
        '.qti': 'image/x-quicktime',
        '.qtif': 'image/x-quicktime',
        '.ra': 'audio/x-pn-realaudio',
        '.ra': 'audio/x-pn-realaudio-plugin',
        '.ra': 'audio/x-realaudio',
        '.ram': 'audio/x-pn-realaudio',
        '.ras': 'application/x-cmu-raster',
        '.ras': 'image/cmu-raster',
        '.ras': 'image/x-cmu-raster',
        '.rast': 'image/cmu-raster',
        '.rexx': 'text/x-script.rexx',
        '.rf': 'image/vnd.rn-realflash',
        '.rgb': 'image/x-rgb',
        '.rm': 'application/vnd.rn-realmedia',
        '.rm': 'audio/x-pn-realaudio',
        '.rmi': 'audio/mid',
        '.rmm': 'audio/x-pn-realaudio',
        '.rmp': 'audio/x-pn-realaudio',
        '.rmp': 'audio/x-pn-realaudio-plugin',
        '.rng': 'application/ringing-tones',
        '.rng': 'application/vnd.nokia.ringing-tone',
        '.rnx': 'application/vnd.rn-realplayer',
        '.roff': 'application/x-troff',
        '.rp': 'image/vnd.rn-realpix',
        '.rpm': 'audio/x-pn-realaudio-plugin',
        '.rt': 'text/richtext',
        '.rt': 'text/vnd.rn-realtext',
        '.rtf': 'application/rtf',
        '.rtf': 'application/x-rtf',
        '.rtf': 'text/richtext',
        '.rtx': 'application/rtf',
        '.rtx': 'text/richtext',
        '.rv': 'video/vnd.rn-realvideo',
        '.s': 'text/x-asm',
        '.s3m': 'audio/s3m',
        '.saveme': 'application/octet-stream',
        '.sbk': 'application/x-tbook',
        '.scm': 'application/x-lotusscreencam',
        '.scm': 'text/x-script.guile',
        '.scm': 'text/x-script.scheme',
        '.scm': 'video/x-scm',
        '.sdml': 'text/plain',
        '.sdp': 'application/sdp',
        '.sdp': 'application/x-sdp',
        '.sdr': 'application/sounder',
        '.sea': 'application/sea',
        '.sea': 'application/x-sea',
        '.set': 'application/set',
        '.sgm': 'text/sgml',
        '.sgm': 'text/x-sgml',
        '.sgml': 'text/sgml',
        '.sgml': 'text/x-sgml',
        '.sh': 'application/x-bsh',
        '.sh': 'application/x-sh',
        '.sh': 'application/x-shar',
        '.sh': 'text/x-script.sh',
        '.shar': 'application/x-bsh',
        '.shar': 'application/x-shar',
        '.shtml': 'text/html',
        '.shtml': 'text/x-server-parsed-html',
        '.sid': 'audio/x-psid',
        '.sit': 'application/x-sit',
        '.sit': 'application/x-stuffit',
        '.skd': 'application/x-koan',
        '.skm': 'application/x-koan',
        '.skp': 'application/x-koan',
        '.skt': 'application/x-koan',
        '.sl': 'application/x-seelogo',
        '.smi': 'application/smil',
        '.smil': 'application/smil',
        '.snd': 'audio/basic',
        '.snd': 'audio/x-adpcm',
        '.sol': 'application/solids',
        '.spc': 'application/x-pkcs7-certificates',
        '.spc': 'text/x-speech',
        '.spl': 'application/futuresplash',
        '.spr': 'application/x-sprite',
        '.sprite': 'application/x-sprite',
        '.src': 'application/x-wais-source',
        '.ssi': 'text/x-server-parsed-html',
        '.ssm': 'application/streamingmedia',
        '.sst': 'application/vnd.ms-pki.certstore',
        '.step': 'application/step',
        '.stl': 'application/sla',
        '.stl': 'application/vnd.ms-pki.stl',
        '.stl': 'application/x-navistyle',
        '.stp': 'application/step',
        '.sv4cpio': 'application/x-sv4cpio',
        '.sv4crc': 'application/x-sv4crc',
        '.svf': 'image/vnd.dwg',
        '.svf': 'image/x-dwg',
        '.svr': 'application/x-world',
        '.svr': 'x-world/x-svr',
        '.swf': 'application/x-shockwave-flash',
        '.t': 'application/x-troff',
        '.talk': 'text/x-speech',
        '.tar': 'application/x-tar',
        '.tbk': 'application/toolbook',
        '.tbk': 'application/x-tbook',
        '.tcl': 'application/x-tcl',
        '.tcl': 'text/x-script.tcl',
        '.tcsh': 'text/x-script.tcsh',
        '.tex': 'application/x-tex',
        '.texi': 'application/x-texinfo',
        '.texinfo': 'application/x-texinfo',
        '.text': 'application/plain',
        '.text': 'text/plain',
        '.tgz': 'application/gnutar',
        '.tgz': 'application/x-compressed',
        '.tif': 'image/tiff',
        '.tif': 'image/x-tiff',
        '.tiff': 'image/tiff',
        '.tiff': 'image/x-tiff',
        '.tr': 'application/x-troff',
        '.tsi': 'audio/tsp-audio',
        '.tsp': 'application/dsptype',
        '.tsp': 'audio/tsplayer',
        '.tsv': 'text/tab-separated-values',
        '.turbot': 'image/florian',
        '.txt': 'text/plain',
        '.uil': 'text/x-uil',
        '.uni': 'text/uri-list',
        '.unis': 'text/uri-list',
        '.unv': 'application/i-deas',
        '.uri': 'text/uri-list',
        '.uris': 'text/uri-list',
        '.ustar': 'application/x-ustar',
        '.ustar': 'multipart/x-ustar',
        '.uu': 'application/octet-stream',
        '.uu': 'text/x-uuencode',
        '.uue': 'text/x-uuencode',
        '.vcd': 'application/x-cdlink',
        '.vcs': 'text/x-vcalendar',
        '.vda': 'application/vda',
        '.vdo': 'video/vdo',
        '.vew': 'application/groupwise',
        '.viv': 'video/vivo',
        '.viv': 'video/vnd.vivov',
        '.vivo': 'video/vivo',
        '.vivo': 'video/vnd.vivo',
        '.vmd': 'application/vocaltec-media-desc',
        '.vmf': 'application/vocaltec-media-file',
        '.voc': 'audio/voc',
        '.voc': 'audio/x-voc',
        '.vos': 'video/vosaic',
        '.vox': 'audio/voxware',
        '.vqe': 'audio/x-twinvq-plugin',
        '.vqf': 'audio/x-twinvq',
        '.vql': 'audio/x-twinvq-plugin',
        '.vrml': 'application/x-vrml',
        '.vrml': 'model/vrml',
        '.vrml': 'x-world/x-vrml',
        '.vrt': 'x-world/x-vrt',
        '.vsd': 'application/x-visio',
        '.vst': 'application/x-visio',
        '.vsw': 'application/x-visio',
        '.w60': 'application/wordperfect6.0',
        '.w61': 'application/wordperfect6.1',
        '.w6w': 'application/msword',
        '.wav': 'audio/wav',
        '.wav': 'audio/x-wav',
        '.wb1': 'application/x-qpro',
        '.wbmp': 'image/vnd.wap.wbmp',
        '.web': 'application/vnd.xara',
        '.wiz': 'application/msword',
        '.wk1': 'application/x-123',
        '.wmf': 'windows/metafile',
        '.wml': 'text/vnd.wap.wml',
        '.wmlc': 'application/vnd.wap.wmlc',
        '.wmls': 'text/vnd.wap.wmlscript',
        '.wmlsc': 'application/vnd.wap.wmlscriptc',
        '.word': 'application/msword',
        '.wp': 'application/wordperfect',
        '.wp5': 'application/wordperfect',
        '.wp5': 'application/wordperfect6.0',
        '.wp6': 'application/wordperfect',
        '.wpd': 'application/wordperfect',
        '.wpd': 'application/x-wpwin',
        '.wq1': 'application/x-lotus',
        '.wri': 'application/mswrite',
        '.wri': 'application/x-wri',
        '.wrl': 'application/x-world',
        '.wrl': 'model/vrml',
        '.wrl': 'x-world/x-vrml',
        '.wrz': 'model/vrml',
        '.wrz': 'x-world/x-vrml',
        '.wsc': 'text/scriplet',
        '.wsrc': 'application/x-wais-source',
        '.wtk': 'application/x-wintalk',
        '.xbm': 'image/x-xbitmap',
        '.xbm': 'image/x-xbm',
        '.xbm': 'image/xbm',
        '.xdr': 'video/x-amt-demorun',
        '.xgz': 'xgl/drawing',
        '.xif': 'image/vnd.xiff',
        '.xl': 'application/excel',
        '.xla': 'application/excel',
        '.xla': 'application/x-excel',
        '.xla': 'application/x-msexcel',
        '.xlb': 'application/excel',
        '.xlb': 'application/vnd.ms-excel',
        '.xlb': 'application/x-excel',
        '.xlc': 'application/excel',
        '.xlc': 'application/vnd.ms-excel',
        '.xlc': 'application/x-excel',
        '.xld': 'application/excel',
        '.xld': 'application/x-excel',
        '.xlk': 'application/excel',
        '.xlk': 'application/x-excel',
        '.xll': 'application/excel',
        '.xll': 'application/vnd.ms-excel',
        '.xll': 'application/x-excel',
        '.xlm': 'application/excel',
        '.xlm': 'application/vnd.ms-excel',
        '.xlm': 'application/x-excel',
        '.xls': 'application/excel',
        '.xls': 'application/vnd.ms-excel',
        '.xls': 'application/x-excel',
        '.xls': 'application/x-msexcel',
        '.xlt': 'application/excel',
        '.xlt': 'application/x-excel',
        '.xlv': 'application/excel',
        '.xlv': 'application/x-excel',
        '.xlw': 'application/excel',
        '.xlw': 'application/vnd.ms-excel',
        '.xlw': 'application/x-excel',
        '.xlw': 'application/x-msexcel',
        '.xm': 'audio/xm',
        '.xml': 'application/xml',
        '.xml': 'text/xml',
        '.xmz': 'xgl/movie',
        '.xpix': 'application/x-vnd.ls-xpix',
        '.xpm': 'image/x-xpixmap',
        '.xpm': 'image/xpm',
        '.x-png': 'image/png',
        '.xsr': 'video/x-amt-showrun',
        '.xwd': 'image/x-xwd',
        '.xwd': 'image/x-xwindowdump',
        '.xyz': 'chemical/x-pdb',
        '.z': 'application/x-compress',
        '.z': 'application/x-compressed',
        '.zip': 'application/x-compressed',
        '.zip': 'application/x-zip-compressed',
        '.zip': 'application/zip',
        '.zip': 'multipart/x-zip',
        '.zoo': 'application/octet-stream',
        '.zsh': 'text/x-script.zsh',
    };

    const i = fileName.lastIndexOf('.');
    let ext = '';
    if (i > 0) { ext = fileName.substr(i); }
    let mime = mimeTypes[ext];
    if (mime == null) { mime = 'application/octet-stream'; }
    return mime;
}
module.exports = mimeType;