(filename, root, mimetype='auto', download=False, charset='UTF-8')
return HTTPResponse(body, **headers)
Open a file in a safe way and return :exc:`HTTPResponse` with status
        code 200, 305, 403 or 404. The ``Content-Type``, ``Content-Encoding``,
        ``Content-Length`` and ``Last-Modified`` headers are set if possible.
        Special support for ``If-Modified-Since``, ``Range`` and ``HEAD``
        requests.

        :param filename: Name or path of the file to send.
        :param root: Root path for file lookups. Should be an absolute directory
            path.
        :param mimetype: Defines the content-type header (default: guess from
            file extension)
        :param download: If True, ask the browser to open a `Save as...` dialog
            instead of opening the file with the associated program. You can
            specify a custom filename as a string. If not specified, the
            original filename is used (default: False).
        :param charset: The charset to use for files with a ``text/*``
            mime-type. (default: UTF-8)
Open a file in a safe way and return :exc:`HTTPResponse` with status
        code 200, 305, 403 or 404. The ``Content-Type``, ``Content-Encoding``,
        ``Content-Length`` and ``Last-Modified`` headers are set if possible.
        Special support for ``If-Modified-Since``, ``Range`` and ``HEAD``
        requests.
Open a file in a safe way and return : exc : HTTPResponse with status code 200 305 403 or 404 . The Content - Type Content - Encoding Content - Length and Last - Modified headers are set if possible . Special support for If - Modified - Since Range and HEAD requests .
def static_file(filename, root, mimetype='auto', download=False, charset='UTF-8'):
    """ Open a file in a safe way and return :exc:`HTTPResponse` with status
        code 200, 305, 403 or 404. The ``Content-Type``, ``Content-Encoding``,
        ``Content-Length`` and ``Last-Modified`` headers are set if possible.
        Special support for ``If-Modified-Since``, ``Range`` and ``HEAD``
        requests.

        :param filename: Name or path of the file to send.
        :param root: Root path for file lookups. Should be an absolute directory
            path.
        :param mimetype: Defines the content-type header (default: guess from
            file extension)
        :param download: If True, ask the browser to open a `Save as...` dialog
            instead of opening the file with the associated program. You can
            specify a custom filename as a string. If not specified, the
            original filename is used (default: False).
        :param charset: The charset to use for files with a ``text/*``
            mime-type. (default: UTF-8)
    """

    root = os.path.abspath(root) + os.sep
    filename = os.path.abspath(os.path.join(root, filename.strip('/\\')))
    headers = dict()

    if not filename.startswith(root):
        return HTTPError(403, "Access denied.")
    if not os.path.exists(filename) or not os.path.isfile(filename):
        return HTTPError(404, "File does not exist.")
    if not os.access(filename, os.R_OK):
        return HTTPError(403, "You do not have permission to access this file.")

    if mimetype == 'auto':
        mimetype, encoding = mimetypes.guess_type(filename)
        if encoding: headers['Content-Encoding'] = encoding

    if mimetype:
        if mimetype[:5] == 'text/' and charset and 'charset' not in mimetype:
            mimetype += '; charset=%s' % charset
        headers['Content-Type'] = mimetype

    if download:
        download = os.path.basename(filename if download == True else download)
        headers['Content-Disposition'] = 'attachment; filename="%s"' % download

    stats = os.stat(filename)
    headers['Content-Length'] = clen = stats.st_size
    lm = time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime(stats.st_mtime))
    headers['Last-Modified'] = lm

    ims = request.environ.get('HTTP_IF_MODIFIED_SINCE')
    if ims:
        ims = parse_date(ims.split(";")[0].strip())
    if ims is not None and ims >= int(stats.st_mtime):
        headers['Date'] = time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime())
        return HTTPResponse(status=304, **headers)

    body = '' if request.method == 'HEAD' else open(filename, 'rb')

    headers["Accept-Ranges"] = "bytes"
    ranges = request.environ.get('HTTP_RANGE')
    if 'HTTP_RANGE' in request.environ:
        ranges = list(parse_range_header(request.environ['HTTP_RANGE'], clen))
        if not ranges:
            return HTTPError(416, "Requested Range Not Satisfiable")
        offset, end = ranges[0]
        headers["Content-Range"] = "bytes %d-%d/%d" % (offset, end-1, clen)
        headers["Content-Length"] = str(end-offset)
        if body: body = _file_iter_range(body, offset, end-offset)
        return HTTPResponse(body, status=206, **headers)
    return HTTPResponse(body, **headers)
def static_file ( filename , root , mimetype = 'auto' , download = False , charset = 'UTF-8' ) : root = os . path . abspath ( root ) + os . sep filename = os . path . abspath ( os . path . join ( root , filename . strip ( '/\\' ) ) ) headers = dict ( ) if not filename . startswith ( root ) : return HTTPError ( 403 , "Access denied." ) if not os . path . exists ( filename ) or not os . path . isfile ( filename ) : return HTTPError ( 404 , "File does not exist." ) if not os . access ( filename , os . R_OK ) : return HTTPError ( 403 , "You do not have permission to access this file." ) if mimetype == 'auto' : mimetype , encoding = mimetypes . guess_type ( filename ) if encoding : headers [ 'Content-Encoding' ] = encoding if mimetype : if mimetype [ : 5 ] == 'text/' and charset and 'charset' not in mimetype : mimetype += '; charset=%s' % charset headers [ 'Content-Type' ] = mimetype if download : download = os . path . basename ( filename if download == True else download ) headers [ 'Content-Disposition' ] = 'attachment; filename="%s"' % download stats = os . stat ( filename ) headers [ 'Content-Length' ] = clen = stats . st_size lm = time . strftime ( "%a, %d %b %Y %H:%M:%S GMT" , time . gmtime ( stats . st_mtime ) ) headers [ 'Last-Modified' ] = lm ims = request . environ . get ( 'HTTP_IF_MODIFIED_SINCE' ) if ims : ims = parse_date ( ims . split ( ";" ) [ 0 ] . strip ( ) ) if ims is not None and ims >= int ( stats . st_mtime ) : headers [ 'Date' ] = time . strftime ( "%a, %d %b %Y %H:%M:%S GMT" , time . gmtime ( ) ) return HTTPResponse ( status = 304 , * * headers ) body = '' if request . method == 'HEAD' else open ( filename , 'rb' ) headers [ "Accept-Ranges" ] = "bytes" ranges = request . environ . get ( 'HTTP_RANGE' ) if 'HTTP_RANGE' in request . environ : ranges = list ( parse_range_header ( request . environ [ 'HTTP_RANGE' ] , clen ) ) if not ranges : return HTTPError ( 416 , "Requested Range Not Satisfiable" ) offset , end = ranges [ 0 ] headers [ "Content-Range" ] = "bytes %d-%d/%d" % ( offset , end - 1 , clen ) headers [ "Content-Length" ] = str ( end - offset ) if body : body = _file_iter_range ( body , offset , end - offset ) return HTTPResponse ( body , status = 206 , * * headers ) return HTTPResponse ( body , * * headers )