'.jpeg': 'image/jpeg',
    '.jpf': 'image/jp2',
    '.jpg': 'image/jpeg',
    '.jpr': 'application/x-jbuilder-project',
    '.jpx': 'image/jp2',
    '.js': 'application/javascript',
    '.json': 'application/json',
    '.jsonp': 'application/jsonp',
    '.k25': 'image/x-kodak-k25',
    '.kar': 'audio/midi',
    '.karbon': 'application/x-karbon',
    '.kdc': 'image/x-kodak-kdc',
    '.kdelnk': 'application/x-desktop',
    '.kexi': 'application/x-kexiproject-sqlite3',
    '.kexic': 'application/x-kexi-connectiondata',

        default = CONTENT_TYPE.get(filename[i:].lower(),default)
        j = filename.rfind('.', 0, i)
        if j>=0:
            default = CONTENT_TYPE.get(filename[j:].lower(),default)
    if default.startswith('text/'):
        default += '; charset=utf-8'
    return default