Exemplo n.º 1
0
def _formatparam(param, value=None, quote=True):
    """Convenience function to format and return a key=value pair.

    This will quote the value if needed or if quote is true.  If value is a
    three tuple (charset, language, value), it will be encoded according
    to RFC2231 rules.  If it contains non-ascii characters it will likewise
    be encoded according to RFC2231 rules, using the utf-8 charset and
    a null language.
    """
    if value is not None and len(value) > 0:
        if isinstance(value, tuple):
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
            return '%s=%s' % (param, value)
        else:
            try:
                value.encode('ascii')
            except UnicodeEncodeError:
                param += '*'
                value = utils.encode_rfc2231(value, 'utf-8', '')
                return '%s=%s' % (param, value)
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 2
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def _formatparam(param, value=None, quote=True):
    """Convenience function to format and return a key=value pair.

    This will quote the value if needed or if quote is true.  If value is a
    three tuple (charset, language, value), it will be encoded according
    to RFC2231 rules.  If it contains non-ascii characters it will likewise
    be encoded according to RFC2231 rules, using the utf-8 charset and
    a null language.
    """
    if value is not None and len(value) > 0:
        # A tuple is used for RFC 2231 encoded parameter values where items
        # are (charset, language, value).  charset is a string, not a Charset
        # instance.  RFC 2231 encoded values are never quoted, per RFC.
        if isinstance(value, tuple):
            # Encode as per RFC 2231
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
            return '%s=%s' % (param, value)
        else:
            try:
                value.encode('ascii')
            except UnicodeEncodeError:
                param += '*'
                value = utils.encode_rfc2231(value, 'utf-8', '')
                return '%s=%s' % (param, value)
        # BAW: Please check this.  I think that if quote is set it should
        # force quoting even if not necessary.
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 3
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def _formatparam(param, value=None, quote=True):
    """Convenience function to format and return a key=value pair.

    This will quote the value if needed or if quote is true.  If value is a
    three tuple (charset, language, value), it will be encoded according
    to RFC2231 rules.  If it contains non-ascii characters it will likewise
    be encoded according to RFC2231 rules, using the utf-8 charset and
    a null language.
    """
    if value is not None and len(value) > 0:
        # A tuple is used for RFC 2231 encoded parameter values where items
        # are (charset, language, value).  charset is a string, not a Charset
        # instance.  RFC 2231 encoded values are never quoted, per RFC.
        if isinstance(value, tuple):
            # Encode as per RFC 2231
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
            return '%s=%s' % (param, value)
        else:
            try:
                value.encode('ascii')
            except UnicodeEncodeError:
                param += '*'
                value = utils.encode_rfc2231(value, 'utf-8', '')
                return '%s=%s' % (param, value)
        # BAW: Please check this.  I think that if quote is set it should
        # force quoting even if not necessary.
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 4
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def json_writer(response, fields, name=None, bom=False):
    u'''Context manager for writing UTF-8 JSON data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file

    >>> with json_writer(response, fields) as d:
    >>>    d.writerow(row1)
    >>>    d.writerow(row2)
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (
            b'application/json; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                b'attachment; filename="{name}.json"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.write(UTF8_BOM)
    response.write(
        b'{\n  "fields": %s,\n  "records": [' % json.dumps(
            fields, ensure_ascii=False, separators=(u',', u':')))
    yield JSONWriter(response, [f['id'] for f in fields])
    response.write(b'\n]}\n')
Exemplo n.º 5
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def json_writer(response: Any,
                fields: list[dict[str, Any]],
                name: Optional[str] = None,
                bom: bool = False):
    u'''Context manager for writing UTF-8 JSON data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (b'application/json; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                u'attachment; filename="{name}.json"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.stream.write(BOM_UTF8)
    response.stream.write(
        six.ensure_binary(
            u'{\n  "fields": %s,\n  "records": [' %
            dumps(fields, ensure_ascii=False, separators=(u',', u':'))))
    yield JSONWriter(response.stream)
    response.stream.write(b'\n]}\n')
Exemplo n.º 6
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def tsv_writer(response: Any,
               fields: list[dict[str, Any]],
               name: Optional[str] = None,
               bom: bool = False):
    u'''Context manager for writing UTF-8 TSV data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (
            b'text/tab-separated-values; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                u'attachment; filename="{name}.tsv"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.stream.write(BOM_UTF8)

    csv.writer(response.stream,
               dialect='excel-tab').writerow(f['id'] for f in fields)
    yield TextWriter(response.stream)
Exemplo n.º 7
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 def get_request_params(self, api_url):
     params = super(MailgunPayload, self).get_request_params(api_url)
     non_ascii_filenames = [
         filename
         for (field, (filename, content, mimetype)) in params["files"]
         if filename is not None and not isascii(filename)
     ]
     if non_ascii_filenames:
         # Workaround https://github.com/requests/requests/issues/4652:
         # Mailgun expects RFC 7578 compliant multipart/form-data, and is confused
         # by Requests/urllib3's improper use of RFC 2231 encoded filename parameters
         # ("filename*=utf-8''...") in Content-Disposition headers.
         # The workaround is to pre-generate the (non-compliant) form-data body, and
         # replace 'filename*={RFC 2231 encoded}' with 'filename="{UTF-8 bytes}"'.
         # Replace _only_ the filenames that will be problems (not all "filename*=...")
         # to minimize potential side effects--e.g., in attached messages that might
         # have their own attachments with (correctly) RFC 2231 encoded filenames.
         prepared = Request(**params).prepare()
         form_data = prepared.body  # bytes
         for filename in non_ascii_filenames:  # text
             rfc2231_filename = encode_rfc2231(  # wants a str (text in PY3, bytes in PY2)
                 filename
                 if isinstance(filename, str) else filename.encode("utf-8"),
                 charset="utf-8")
             form_data = form_data.replace(
                 b'filename*=' + rfc2231_filename.encode("utf-8"),
                 b'filename="' + filename.encode("utf-8") + b'"')
         params["data"] = form_data
         params["headers"]["Content-Type"] = prepared.headers[
             "Content-Type"]  # multipart/form-data; boundary=...
         params["files"] = None  # these are now in the form_data body
     return params
Exemplo n.º 8
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def xml_writer(response, fields, name=None, bom=False):
    u'''Context manager for writing UTF-8 XML data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file

    >>> with xml_writer(response, fields) as d:
    >>>    d.writerow(row1)
    >>>    d.writerow(row2)
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (
            b'text/xml; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                b'attachment; filename="{name}.xml"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.write(UTF8_BOM)
    response.write(b'<data>\n')
    yield XMLWriter(response, [f['id'] for f in fields])
    response.write(b'</data>\n')
Exemplo n.º 9
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def encode_params(value):
    """RFC 5987(8187) (specialized from RFC 2231) parameter encoding.

    This encodes parameters as specified by RFC 5987 using
    fixed `UTF-8` encoding (as required by RFC 8187).
    However, all parameters with non latin-1 values are
    automatically transformed and a `*` suffixed parameter is added
    (RFC 8187 allows this only for parameters explicitly specified
    to have this behavior).

    Many HTTP headers use `,` separated lists. For simplicity,
    such headers are not supported (we would need to recognize
    `,` inside quoted strings as special).
    """
    params = []
    for p in _parseparam(";" + value):
        p = p.strip()
        if not p:
            continue
        params.append([s.strip() for s in p.split("=", 1)])
    known_params = {p[0] for p in params}
    for p in params[:]:
        if len(p) == 2 and non_latin_1(p[1]):  # need encoding
            pn = p[0]
            pnc = pn + "*"
            pv = p[1]
            if pnc not in known_params:
                if pv.startswith('"'):
                    pv = pv[1:-1]  # remove quotes
                params.append((pnc, encode_rfc2231(pv, "utf-8", None)))
            # backward compatibility for clients not understanding RFC 5987
            p[1] = p[1].encode("iso-8859-1", "replace").decode("iso-8859-1")
    return "; ".join("=".join(p) for p in params)
Exemplo n.º 10
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def tsv_writer(response, fields, name=None, bom=False):
    u'''Context manager for writing UTF-8 TSV data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file

    >>> with tsv_writer(response, fields) as d:
    >>>    d.writerow(row1)
    >>>    d.writerow(row2)
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (
            b'text/tab-separated-values; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                b'attachment; filename="{name}.tsv"'.format(
                    name=encode_rfc2231(name)))
    wr = CSVWriter(
        response, fields, encoding=u'utf-8', dialect=unicodecsv.excel_tab,
    )
    if bom:
        response.write(UTF8_BOM)
    wr.writerow(f['id'] for f in fields)
    yield wr
Exemplo n.º 11
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def json_writer(response, fields, name=None, bom=False):
    u'''Context manager for writing UTF-8 JSON data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file

    >>> with json_writer(response, fields) as d:
    >>>    d.writerow(row1)
    >>>    d.writerow(row2)
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (
            b'application/json; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                b'attachment; filename="{name}.json"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.write(UTF8_BOM)
    response.write(
        b'{\n  "fields": %s,\n  "records": [' % json.dumps(
            fields, ensure_ascii=False, separators=(u',', u':')))
    yield JSONWriter(response, [f['id'] for f in fields])
    response.write(b'\n]}\n')
Exemplo n.º 12
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def xml_writer(response, fields, name=None, bom=False):
    u'''Context manager for writing UTF-8 XML data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file

    >>> with xml_writer(response, fields) as d:
    >>>    d.writerow(row1)
    >>>    d.writerow(row2)
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (
            b'text/xml; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                b'attachment; filename="{name}.xml"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.write(UTF8_BOM)
    response.write(b'<data>\n')
    yield XMLWriter(response, [f['id'] for f in fields])
    response.write(b'</data>\n')
Exemplo n.º 13
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def tsv_writer(response, fields, name=None, bom=False):
    u'''Context manager for writing UTF-8 TSV data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file

    >>> with tsv_writer(response, fields) as d:
    >>>    d.writerow(row1)
    >>>    d.writerow(row2)
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (
            b'text/tab-separated-values; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                b'attachment; filename="{name}.tsv"'.format(
                    name=encode_rfc2231(name)))
    wr = unicodecsv.writer(
        response, encoding=u'utf-8', dialect=unicodecsv.excel_tab)
    if bom:
        response.write(UTF8_BOM)
    wr.writerow(f['id'] for f in fields)
    yield wr
Exemplo n.º 14
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def _formatparam(param, value=None, quote=True):
    if value is not None and len(value) > 0:
        if isinstance(value, tuple):
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
            return '%s=%s' % (param, value)
        try:
            value.encode('ascii')
        except UnicodeEncodeError:
            param += '*'
            value = utils.encode_rfc2231(value, 'utf-8', '')
            return '%s=%s' % (param, value)
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 15
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def _formatparam(param, value=None, quote=True):
    if value is not None and len(value) > 0:
        if isinstance(value, tuple):
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
            return '%s=%s' % (param, value)
        try:
            value.encode('ascii')
        except UnicodeEncodeError:
            param += '*'
            value = utils.encode_rfc2231(value, 'utf-8', '')
            return '%s=%s' % (param, value)
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 16
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def encode_header_value(value: Union[str, datetime, Number],
                        params: Dict[str, Union[str, datetime, Number]], *,
                        encoding: str = 'ascii', always_quote: bool = False) -> bytes:
    """
    Encode a structured header value for transmission over the network.

    If a parameter value cannot be encoded to the given encoding, the :rfc:`5987` method is used to
    encode the value in an alternate field using :rfc:`2231` encoding where the field name ends
    with ``*``. The original field will have an urlencoded version of the value.

    Any datetimes in the ``value`` argument or any of the parameter values will be formatted
    as defined by :rfc:`822`. Any numeric values will be converted to strings. If a parameter value
    is ``False`` or ``None``, the parameter is omitted entirely from the output. If the value is
    ``True``, only the key will be included in the output (without any ``=``). All other value
    types are disallowed.

    :param value: the main value of the header
    :param params: a dictionary of parameter names and values
    :param encoding: the character encoding to use (either ``ascii`` or ``iso-8859-1``)
    :param always_quote: always enclose the parameter values in quotes, even if it's unnecessary
    :return: the encoded bytestring

    """
    def transform_value(val):
        if isinstance(val, str):
            return val
        elif isinstance(val, datetime):
            return format_datetime(val.astimezone(timezone.utc), usegmt=True)
        else:
            return str(val)

    assert check_argument_types()
    buffer = transform_value(value).encode(encoding)
    for key, value in params.items():
        key = key.encode(encoding)
        buffer += b'; ' + key
        value = transform_value(value)
        quoted_value = quote(value)
        add_quotes = always_quote or quoted_value != value
        try:
            quoted_value = quoted_value.encode(encoding)
        except UnicodeEncodeError:
            ascii_value = urllib_quote(quoted_value).encode('ascii')
            rfc2231_value = encode_rfc2231(quoted_value, 'utf-8').encode('utf-8')
            if add_quotes:
                ascii_value = b'"' + ascii_value + b'"'
                rfc2231_value = b'"' + rfc2231_value + b'"'

            buffer += b'=' + ascii_value + b'; ' + key + b'*=' + rfc2231_value
        else:
            if add_quotes:
                quoted_value = b'"' + quoted_value + b'"'

            buffer += b'=' + quoted_value

    return buffer
Exemplo n.º 17
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def _formatparam(param, value = None, quote = True):
    if value is not None and len(value) > 0:
        if isinstance(value, tuple):
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 18
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def _formatparam(param, value=None, quote=True):
    if value is not None and len(value) > 0:
        if isinstance(value, tuple):
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 19
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def serve_request(request, connection, _id=None):
    fs = GridFS(connection[settings.MONGO_DB_NAME])
    try:
        file = fs.get(_id)
    except:
        abort(404)

    if getattr(file, 'pending', False):
        abort(404)

    if getattr(file, 'deleted', False):
        abort(404)

    if request.if_modified_since:
        if request.if_modified_since > file.uploadDate:
            return Response(status=304)
    if request.if_none_match:
        if request.if_none_match.contains(file.md5):
            return Response(status=304)

    filename = file.filename
    # Process non-latin filenames using technique described here:
    # http://greenbytes.de/tech/tc2231/#encoding-2231-fb
    rfc2231_filename = encode_rfc2231(filename.encode('utf-8'), 'UTF-8')
    transliterated_filename = unidecode(filename)
    content_disposition = 'inline; filename="%s"; filename*=%s;' % (
        transliterated_filename, rfc2231_filename
        )

    headers = {'Content-Disposition': content_disposition}

    callbacks = [connection.close]
    if not request.range:
        return serve_full_file_request(request, headers, file, callbacks=callbacks)

    if request.range.units != 'bytes':
        abort(400)

    ranges = request.range.ranges
    if len(ranges) > 1:
        return serve_full_file_request(request, headers, file, callbacks=callbacks)

    start, end = ranges[0]
    if end is None:
        end = file.length
    elif end > file.length:
        abort(416)

    return serve_partial_file_request(request, headers, file, start, end,
                                      callbacks=callbacks)
Exemplo n.º 20
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def _formatparam(param, value=None, quote=True):
    """Convenience function to format and return a key=value pair.
    
    This will quote the value if needed or if quote is true.
    """
    if value is not None and len(value) > 0:
        if isinstance(value, tuple):
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 21
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def _formatparam(param, value=None, quote=True):
    """This is _formatparam from Python 2.7"""
    if value is not None and len(value) > 0:
        # A tuple is used for RFC 2231 encoded parameter values where items
        # are (charset, language, value).  charset is a string, not a Charset
        # instance.
        if isinstance(value, tuple):
            # Encode as per RFC 2231
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
        # BAW: Please check this.  I think that if quote is set it should
        # force quoting even if not necessary.
        if quote or message.tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 22
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def _formatparam(param, value = None, quote = True):
    """Convenience function to format and return a key=value pair.
    
    This will quote the value if needed or if quote is true.  If value is a
    three tuple (charset, language, value), it will be encoded according
    to RFC2231 rules.
    """
    if value is not None and len(value) > 0:
        if isinstance(value, tuple):
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
    return
Exemplo n.º 23
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def mailto_format(**kwargs):
    # @TODO: implement utf8 option

    kwargs = _fix_addersses(**kwargs)
    parts = []
    for headername in ('to', 'cc', 'bcc', 'subject', 'body', 'attach'):
        if headername in kwargs:
            headervalue = kwargs[headername]
            if not headervalue:
                continue
            if headername in ('address', 'to', 'cc', 'bcc'):
                parts.append('%s=%s' % (headername, headervalue))
            else:
                headervalue = encode_rfc2231(headervalue) # @TODO: check
                parts.append('%s=%s' % (headername, headervalue))

    mailto_string = 'mailto:%s' % kwargs.get('address', '')
    if parts:
        mailto_string = '%s?%s' % (mailto_string, '&'.join(parts))

    return mailto_string
Exemplo n.º 24
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def csv_writer(response, fields, name=None, bom=False):
    u'''Context manager for writing UTF-8 CSV data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = b'text/csv; charset=utf-8'
        if name:
            response.headers['Content-disposition'] = (
                u'attachment; filename="{name}.csv"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.stream.write(BOM_UTF8)

    csv.writer(response.stream).writerow(f['id'] for f in fields)
    yield TextWriter(response.stream)
Exemplo n.º 25
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def _formatparam(param, value=None, quote=True):
    """Convenience function to format and return a key=value pair.

    This will quote the value if needed or if quote is true.
    """
    if value is not None and len(value) > 0:
        # A tuple is used for RFC 2231 encoded parameter values where items
        # are (charset, language, value).  charset is a string, not a Charset
        # instance.
        if isinstance(value, tuple):
            # Encode as per RFC 2231
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
        # BAW: Please check this.  I think that if quote is set it should
        # force quoting even if not necessary.
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 26
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def _formatparam(param, value=None, quote=True):
    """Convenience function to format and return a key=value pair.

    This will quote the value if needed or if quote is true.
    """
    if value is not None and len(value) > 0:
        # A tuple is used for RFC 2231 encoded parameter values where items
        # are (charset, language, value).  charset is a string, not a Charset
        # instance.
        if isinstance(value, tuple):
            # Encode as per RFC 2231
            param += '*'
            value = utils.encode_rfc2231(value[2], value[0], value[1])
        # BAW: Please check this.  I think that if quote is set it should
        # force quoting even if not necessary.
        if quote or tspecials.search(value):
            return '%s="%s"' % (param, utils.quote(value))
        else:
            return '%s=%s' % (param, value)
    else:
        return param
Exemplo n.º 27
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def csv_writer(response, fields, name=None, bom=False):
    u'''Context manager for writing UTF-8 CSV data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = b'text/csv; charset=utf-8'
        if name:
            response.headers['Content-disposition'] = (
                b'attachment; filename="{name}.csv"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.write(BOM_UTF8)

    unicodecsv.writer(response, encoding=u'utf-8').writerow(
        f['id'] for f in fields)
    yield TextWriter(response)
Exemplo n.º 28
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def xml_writer(response: Any,
               fields: list[dict[str, Any]],
               name: Optional[str] = None,
               bom: bool = False):
    u'''Context manager for writing UTF-8 XML data to response

    :param response: file-like or response-like object for writing
        data and headers (response-like objects only)
    :param fields: list of datastore fields
    :param name: file name (for headers, response-like objects only)
    :param bom: True to include a UTF-8 BOM at the start of the file
    '''

    if hasattr(response, u'headers'):
        response.headers['Content-Type'] = (b'text/xml; charset=utf-8')
        if name:
            response.headers['Content-disposition'] = (
                u'attachment; filename="{name}.xml"'.format(
                    name=encode_rfc2231(name)))
    if bom:
        response.stream.write(BOM_UTF8)
    response.stream.write(b'<data>\n')
    yield XMLWriter(response.stream, [f[u'id'] for f in fields])
    response.stream.write(b'</data>\n')
Exemplo n.º 29
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def serve_request(request, connection, _id=None, filename=None):
    fs = GridFS(connection[settings.MONGO_DB_NAME])
    if _id:
        try:
            file = fs.get(_id)
        except:
            abort(404)
    elif filename:
        try:
            file = fs.get_last_version(filename)
        except:
            abort(404)
    else:
        abort(404)

    if getattr(file, 'pending', False):
        abort(404)

    if getattr(file, 'deleted', False):
        abort(404)

    if request.if_modified_since:
        if request.if_modified_since > file.uploadDate:
            return Response(status=304)
    if request.if_none_match:
        if request.if_none_match.contains(file.md5):
            return Response(status=304)

    filename = file.filename
    # Process non-latin filenames using technique described here:
    # http://greenbytes.de/tech/tc2231/#encoding-2231-fb
    rfc2231_filename = encode_rfc2231(filename.encode('utf-8'), 'UTF-8')
    transliterated_filename = unidecode(filename)
    content_disposition = 'inline; filename="%s"; filename*=%s;' % (
        transliterated_filename, rfc2231_filename)

    headers = {'Content-Disposition': content_disposition}

    callbacks = [connection.close]
    if not request.range:
        return serve_full_file_request(request,
                                       headers,
                                       file,
                                       callbacks=callbacks)

    if request.range.units != 'bytes':
        abort(400)

    ranges = request.range.ranges
    if len(ranges) > 1:
        return serve_full_file_request(request,
                                       headers,
                                       file,
                                       callbacks=callbacks)

    start, end = ranges[0]
    if end is None:
        end = file.length
    elif end > file.length:
        abort(416)

    return serve_partial_file_request(request,
                                      headers,
                                      file,
                                      start,
                                      end,
                                      callbacks=callbacks)