Python _internal._empty_stream方法代码示例

# 需要导入模块: from werkzeug import _internal [as 别名]
# 或者: from werkzeug._internal import _empty_stream [as 别名]
def get_input_stream(environ, safe_fallback=True):
    """Returns the input stream from the WSGI environment and wraps it
    in the most sensible way possible.  The stream returned is not the
    raw WSGI stream in most cases but one that is safe to read from
    without taking into account the content length.

    .. versionadded:: 0.9

    :param environ: the WSGI environ to fetch the stream from.
    :param safe: indicates whether the function should use an empty
                 stream as safe fallback or just return the original
                 WSGI input stream if it can't wrap it safely.  The
                 default is to return an empty string in those cases.
    """
    stream = environ['wsgi.input']
    content_length = get_content_length(environ)

    # A wsgi extension that tells us if the input is terminated.  In
    # that case we return the stream unchanged as we know we can safely
    # read it until the end.
    if environ.get('wsgi.input_terminated'):
        return stream

    # If we don't have a content length we fall back to an empty stream
    # in case of a safe fallback, otherwise we return the stream unchanged.
    # The non-safe fallback is not recommended but might be useful in
    # some situations.
    if content_length is None:
        return safe_fallback and _empty_stream or stream

    # Otherwise limit the stream to the content length
    return LimitedStream(stream, content_length) 

# 需要导入模块: from werkzeug import _internal [as 别名]
# 或者: from werkzeug._internal import _empty_stream [as 别名]
def get_input_stream(environ, safe_fallback=True):
    """Returns the input stream from the WSGI environment and wraps it
    in the most sensible way possible. The stream returned is not the
    raw WSGI stream in most cases but one that is safe to read from
    without taking into account the content length.

    If content length is not set, the stream will be empty for safety reasons.
    If the WSGI server supports chunked or infinite streams, it should set
    the ``wsgi.input_terminated`` value in the WSGI environ to indicate that.

    .. versionadded:: 0.9

    :param environ: the WSGI environ to fetch the stream from.
    :param safe_fallback: use an empty stream as a safe fallback when the
        content length is not set. Disabling this allows infinite streams,
        which can be a denial-of-service risk.
    """
    stream = environ['wsgi.input']
    content_length = get_content_length(environ)

    # A wsgi extension that tells us if the input is terminated.  In
    # that case we return the stream unchanged as we know we can safely
    # read it until the end.
    if environ.get('wsgi.input_terminated'):
        return stream

    # If the request doesn't specify a content length, returning the stream is
    # potentially dangerous because it could be infinite, malicious or not. If
    # safe_fallback is true, return an empty stream instead for safety.
    if content_length is None:
        return safe_fallback and _empty_stream or stream

    # Otherwise limit the stream to the content length
    return LimitedStream(stream, content_length) 

# 需要导入模块: from werkzeug import _internal [as 别名]
# 或者: from werkzeug._internal import _empty_stream [as 别名]
def get_input_stream(environ, safe_fallback=True):
    """Returns the input stream from the WSGI environment and wraps it
    in the most sensible way possible.  The stream returned is not the
    raw WSGI stream in most cases but one that is safe to read from
    without taking into account the content length.

    .. versionadded:: 0.9

    :param environ: the WSGI environ to fetch the stream from.
    :param safe: indicates weather the function should use an empty
                 stream as safe fallback or just return the original
                 WSGI input stream if it can't wrap it safely.  The
                 default is to return an empty string in those cases.
    """
    stream = environ['wsgi.input']
    content_length = get_content_length(environ)

    # A wsgi extension that tells us if the input is terminated.  In
    # that case we return the stream unchanged as we know we can savely
    # read it until the end.
    if environ.get('wsgi.input_terminated'):
        return stream

    # If we don't have a content length we fall back to an empty stream
    # in case of a safe fallback, otherwise we return the stream unchanged.
    # The non-safe fallback is not recommended but might be useful in
    # some situations.
    if content_length is None:
        return safe_fallback and _empty_stream or stream

    # Otherwise limit the stream to the content length
    return LimitedStream(stream, content_length)