Method __init__

mitmproxy/http.py:93–117

*Args:* - *fields:* (optional) list of ``(name, value)`` header byte tuples, e.g. ``[(b"Host", b"example.com")]``. All names and values must be bytes. - *\\*\\*headers:* Additional headers to set. Will overwrite existing values from `fields`. For conv

(self, fields: Iterable[tuple[bytes, bytes]] = (), **headers)

    """

    def __init__(self, fields: Iterable[tuple[bytes, bytes]] = (), **headers):
        """
        *Args:*
         - *fields:* (optional) list of ``(name, value)`` header byte tuples,
           e.g. ``[(b"Host", b"example.com")]``. All names and values must be bytes.
         - *\\*\\*headers:* Additional headers to set. Will overwrite existing values from `fields`.
           For convenience, underscores in header names will be transformed to dashes -
           this behaviour does not extend to other methods.

        If ``**headers`` contains multiple keys that have equal ``.lower()`` representations,
        the behavior is undefined.
        """
        super().__init__(fields)

        for key, value in self.fields:
            if not isinstance(key, bytes) or not isinstance(value, bytes):
                raise TypeError("Header fields must be bytes.")

        # content_type -> content-type
        self.update(
            {
                _always_bytes(name).replace(b"_", b"-"): _always_bytes(value)
                for name, value in headers.items()
            }
        )

    fields: tuple[tuple[bytes, bytes], ...]