Class Frame

mitmproxy/contentviews/_view_http3.py:19–52

Representation of an HTTP/3 frame.

@dataclass(frozen=True)
class Frame:
    """Representation of an HTTP/3 frame."""

    type: int
    data: bytes

    def pretty(self) -> str:
        frame_name = f"0x{self.type:x} Frame"
        if self.type == 0:
            frame_name = "DATA Frame"
        elif self.type == 1:
            try:
                hdrs = pylsqpack.Decoder(4096, 16).feed_header(0, self.data)[1]
                return f"HEADERS Frame\n" + "\n".join(
                    f"{k.decode(errors='backslashreplace')}: {v.decode(errors='backslashreplace')}"
                    for k, v in hdrs
                )
            except Exception as e:
                frame_name = f"HEADERS Frame (error: {e})"
        elif self.type == 4:
            settings = []
            try:
                s = parse_settings(self.data)
            except Exception as e:
                frame_name = f"SETTINGS Frame (error: {e})"
            else:
                for k, v in s.items():
                    try:
                        key = Setting(k).name
                    except ValueError:
                        key = f"0x{k:x}"
                    settings.append(f"{key}: 0x{v:x}")
                return "SETTINGS Frame\n" + "\n".join(settings)
        return f"{frame_name}\n" + hex_dump.prettify(self.data, Metadata())


@dataclass(frozen=True)