two version of R2R are here HEAD master

1 files changed, 430 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/websockets/frames.py b/.venv/lib/python3.12/site-packages/websockets/frames.py
new file mode 100644
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+++ b/.venv/lib/python3.12/site-packages/websockets/frames.py
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+from __future__ import annotations
+
+import dataclasses
+import enum
+import io
+import os
+import secrets
+import struct
+from collections.abc import Generator, Sequence
+from typing import Callable, Union
+
+from .exceptions import PayloadTooBig, ProtocolError
+
+
+try:
+    from .speedups import apply_mask
+except ImportError:
+    from .utils import apply_mask
+
+
+__all__ = [
+    "Opcode",
+    "OP_CONT",
+    "OP_TEXT",
+    "OP_BINARY",
+    "OP_CLOSE",
+    "OP_PING",
+    "OP_PONG",
+    "DATA_OPCODES",
+    "CTRL_OPCODES",
+    "CloseCode",
+    "Frame",
+    "Close",
+]
+
+
+class Opcode(enum.IntEnum):
+    """Opcode values for WebSocket frames."""
+
+    CONT, TEXT, BINARY = 0x00, 0x01, 0x02
+    CLOSE, PING, PONG = 0x08, 0x09, 0x0A
+
+
+OP_CONT = Opcode.CONT
+OP_TEXT = Opcode.TEXT
+OP_BINARY = Opcode.BINARY
+OP_CLOSE = Opcode.CLOSE
+OP_PING = Opcode.PING
+OP_PONG = Opcode.PONG
+
+DATA_OPCODES = OP_CONT, OP_TEXT, OP_BINARY
+CTRL_OPCODES = OP_CLOSE, OP_PING, OP_PONG
+
+
+class CloseCode(enum.IntEnum):
+    """Close code values for WebSocket close frames."""
+
+    NORMAL_CLOSURE = 1000
+    GOING_AWAY = 1001
+    PROTOCOL_ERROR = 1002
+    UNSUPPORTED_DATA = 1003
+    # 1004 is reserved
+    NO_STATUS_RCVD = 1005
+    ABNORMAL_CLOSURE = 1006
+    INVALID_DATA = 1007
+    POLICY_VIOLATION = 1008
+    MESSAGE_TOO_BIG = 1009
+    MANDATORY_EXTENSION = 1010
+    INTERNAL_ERROR = 1011
+    SERVICE_RESTART = 1012
+    TRY_AGAIN_LATER = 1013
+    BAD_GATEWAY = 1014
+    TLS_HANDSHAKE = 1015
+
+
+# See https://www.iana.org/assignments/websocket/websocket.xhtml
+CLOSE_CODE_EXPLANATIONS: dict[int, str] = {
+    CloseCode.NORMAL_CLOSURE: "OK",
+    CloseCode.GOING_AWAY: "going away",
+    CloseCode.PROTOCOL_ERROR: "protocol error",
+    CloseCode.UNSUPPORTED_DATA: "unsupported data",
+    CloseCode.NO_STATUS_RCVD: "no status received [internal]",
+    CloseCode.ABNORMAL_CLOSURE: "abnormal closure [internal]",
+    CloseCode.INVALID_DATA: "invalid frame payload data",
+    CloseCode.POLICY_VIOLATION: "policy violation",
+    CloseCode.MESSAGE_TOO_BIG: "message too big",
+    CloseCode.MANDATORY_EXTENSION: "mandatory extension",
+    CloseCode.INTERNAL_ERROR: "internal error",
+    CloseCode.SERVICE_RESTART: "service restart",
+    CloseCode.TRY_AGAIN_LATER: "try again later",
+    CloseCode.BAD_GATEWAY: "bad gateway",
+    CloseCode.TLS_HANDSHAKE: "TLS handshake failure [internal]",
+}
+
+
+# Close code that are allowed in a close frame.
+# Using a set optimizes `code in EXTERNAL_CLOSE_CODES`.
+EXTERNAL_CLOSE_CODES = {
+    CloseCode.NORMAL_CLOSURE,
+    CloseCode.GOING_AWAY,
+    CloseCode.PROTOCOL_ERROR,
+    CloseCode.UNSUPPORTED_DATA,
+    CloseCode.INVALID_DATA,
+    CloseCode.POLICY_VIOLATION,
+    CloseCode.MESSAGE_TOO_BIG,
+    CloseCode.MANDATORY_EXTENSION,
+    CloseCode.INTERNAL_ERROR,
+    CloseCode.SERVICE_RESTART,
+    CloseCode.TRY_AGAIN_LATER,
+    CloseCode.BAD_GATEWAY,
+}
+
+
+OK_CLOSE_CODES = {
+    CloseCode.NORMAL_CLOSURE,
+    CloseCode.GOING_AWAY,
+    CloseCode.NO_STATUS_RCVD,
+}
+
+
+BytesLike = bytes, bytearray, memoryview
+
+
+@dataclasses.dataclass
+class Frame:
+    """
+    WebSocket frame.
+
+    Attributes:
+        opcode: Opcode.
+        data: Payload data.
+        fin: FIN bit.
+        rsv1: RSV1 bit.
+        rsv2: RSV2 bit.
+        rsv3: RSV3 bit.
+
+    Only these fields are needed. The MASK bit, payload length and masking-key
+    are handled on the fly when parsing and serializing frames.
+
+    """
+
+    opcode: Opcode
+    data: Union[bytes, bytearray, memoryview]
+    fin: bool = True
+    rsv1: bool = False
+    rsv2: bool = False
+    rsv3: bool = False
+
+    # Configure if you want to see more in logs. Should be a multiple of 3.
+    MAX_LOG_SIZE = int(os.environ.get("WEBSOCKETS_MAX_LOG_SIZE", "75"))
+
+    def __str__(self) -> str:
+        """
+        Return a human-readable representation of a frame.
+
+        """
+        coding = None
+        length = f"{len(self.data)} byte{'' if len(self.data) == 1 else 's'}"
+        non_final = "" if self.fin else "continued"
+
+        if self.opcode is OP_TEXT:
+            # Decoding only the beginning and the end is needlessly hard.
+            # Decode the entire payload then elide later if necessary.
+            data = repr(bytes(self.data).decode())
+        elif self.opcode is OP_BINARY:
+            # We'll show at most the first 16 bytes and the last 8 bytes.
+            # Encode just what we need, plus two dummy bytes to elide later.
+            binary = self.data
+            if len(binary) > self.MAX_LOG_SIZE // 3:
+                cut = (self.MAX_LOG_SIZE // 3 - 1) // 3  # by default cut = 8
+                binary = b"".join([binary[: 2 * cut], b"\x00\x00", binary[-cut:]])
+            data = " ".join(f"{byte:02x}" for byte in binary)
+        elif self.opcode is OP_CLOSE:
+            data = str(Close.parse(self.data))
+        elif self.data:
+            # We don't know if a Continuation frame contains text or binary.
+            # Ping and Pong frames could contain UTF-8.
+            # Attempt to decode as UTF-8 and display it as text; fallback to
+            # binary. If self.data is a memoryview, it has no decode() method,
+            # which raises AttributeError.
+            try:
+                data = repr(bytes(self.data).decode())
+                coding = "text"
+            except (UnicodeDecodeError, AttributeError):
+                binary = self.data
+                if len(binary) > self.MAX_LOG_SIZE // 3:
+                    cut = (self.MAX_LOG_SIZE // 3 - 1) // 3  # by default cut = 8
+                    binary = b"".join([binary[: 2 * cut], b"\x00\x00", binary[-cut:]])
+                data = " ".join(f"{byte:02x}" for byte in binary)
+                coding = "binary"
+        else:
+            data = "''"
+
+        if len(data) > self.MAX_LOG_SIZE:
+            cut = self.MAX_LOG_SIZE // 3 - 1  # by default cut = 24
+            data = data[: 2 * cut] + "..." + data[-cut:]
+
+        metadata = ", ".join(filter(None, [coding, length, non_final]))
+
+        return f"{self.opcode.name} {data} [{metadata}]"
+
+    @classmethod
+    def parse(
+        cls,
+        read_exact: Callable[[int], Generator[None, None, bytes]],
+        *,
+        mask: bool,
+        max_size: int | None = None,
+        extensions: Sequence[extensions.Extension] | None = None,
+    ) -> Generator[None, None, Frame]:
+        """
+        Parse a WebSocket frame.
+
+        This is a generator-based coroutine.
+
+        Args:
+            read_exact: Generator-based coroutine that reads the requested
+                bytes or raises an exception if there isn't enough data.
+            mask: Whether the frame should be masked i.e. whether the read
+                happens on the server side.
+            max_size: Maximum payload size in bytes.
+            extensions: List of extensions, applied in reverse order.
+
+        Raises:
+            EOFError: If the connection is closed without a full WebSocket frame.
+            PayloadTooBig: If the frame's payload size exceeds ``max_size``.
+            ProtocolError: If the frame contains incorrect values.
+
+        """
+        # Read the header.
+        data = yield from read_exact(2)
+        head1, head2 = struct.unpack("!BB", data)
+
+        # While not Pythonic, this is marginally faster than calling bool().
+        fin = True if head1 & 0b10000000 else False
+        rsv1 = True if head1 & 0b01000000 else False
+        rsv2 = True if head1 & 0b00100000 else False
+        rsv3 = True if head1 & 0b00010000 else False
+
+        try:
+            opcode = Opcode(head1 & 0b00001111)
+        except ValueError as exc:
+            raise ProtocolError("invalid opcode") from exc
+
+        if (True if head2 & 0b10000000 else False) != mask:
+            raise ProtocolError("incorrect masking")
+
+        length = head2 & 0b01111111
+        if length == 126:
+            data = yield from read_exact(2)
+            (length,) = struct.unpack("!H", data)
+        elif length == 127:
+            data = yield from read_exact(8)
+            (length,) = struct.unpack("!Q", data)
+        if max_size is not None and length > max_size:
+            raise PayloadTooBig(length, max_size)
+        if mask:
+            mask_bytes = yield from read_exact(4)
+
+        # Read the data.
+        data = yield from read_exact(length)
+        if mask:
+            data = apply_mask(data, mask_bytes)
+
+        frame = cls(opcode, data, fin, rsv1, rsv2, rsv3)
+
+        if extensions is None:
+            extensions = []
+        for extension in reversed(extensions):
+            frame = extension.decode(frame, max_size=max_size)
+
+        frame.check()
+
+        return frame
+
+    def serialize(
+        self,
+        *,
+        mask: bool,
+        extensions: Sequence[extensions.Extension] | None = None,
+    ) -> bytes:
+        """
+        Serialize a WebSocket frame.
+
+        Args:
+            mask: Whether the frame should be masked i.e. whether the write
+                happens on the client side.
+            extensions: List of extensions, applied in order.
+
+        Raises:
+            ProtocolError: If the frame contains incorrect values.
+
+        """
+        self.check()
+
+        if extensions is None:
+            extensions = []
+        for extension in extensions:
+            self = extension.encode(self)
+
+        output = io.BytesIO()
+
+        # Prepare the header.
+        head1 = (
+            (0b10000000 if self.fin else 0)
+            | (0b01000000 if self.rsv1 else 0)
+            | (0b00100000 if self.rsv2 else 0)
+            | (0b00010000 if self.rsv3 else 0)
+            | self.opcode
+        )
+
+        head2 = 0b10000000 if mask else 0
+
+        length = len(self.data)
+        if length < 126:
+            output.write(struct.pack("!BB", head1, head2 | length))
+        elif length < 65536:
+            output.write(struct.pack("!BBH", head1, head2 | 126, length))
+        else:
+            output.write(struct.pack("!BBQ", head1, head2 | 127, length))
+
+        if mask:
+            mask_bytes = secrets.token_bytes(4)
+            output.write(mask_bytes)
+
+        # Prepare the data.
+        if mask:
+            data = apply_mask(self.data, mask_bytes)
+        else:
+            data = self.data
+        output.write(data)
+
+        return output.getvalue()
+
+    def check(self) -> None:
+        """
+        Check that reserved bits and opcode have acceptable values.
+
+        Raises:
+            ProtocolError: If a reserved bit or the opcode is invalid.
+
+        """
+        if self.rsv1 or self.rsv2 or self.rsv3:
+            raise ProtocolError("reserved bits must be 0")
+
+        if self.opcode in CTRL_OPCODES:
+            if len(self.data) > 125:
+                raise ProtocolError("control frame too long")
+            if not self.fin:
+                raise ProtocolError("fragmented control frame")
+
+
+@dataclasses.dataclass
+class Close:
+    """
+    Code and reason for WebSocket close frames.
+
+    Attributes:
+        code: Close code.
+        reason: Close reason.
+
+    """
+
+    code: int
+    reason: str
+
+    def __str__(self) -> str:
+        """
+        Return a human-readable representation of a close code and reason.
+
+        """
+        if 3000 <= self.code < 4000:
+            explanation = "registered"
+        elif 4000 <= self.code < 5000:
+            explanation = "private use"
+        else:
+            explanation = CLOSE_CODE_EXPLANATIONS.get(self.code, "unknown")
+        result = f"{self.code} ({explanation})"
+
+        if self.reason:
+            result = f"{result} {self.reason}"
+
+        return result
+
+    @classmethod
+    def parse(cls, data: bytes) -> Close:
+        """
+        Parse the payload of a close frame.
+
+        Args:
+            data: Payload of the close frame.
+
+        Raises:
+            ProtocolError: If data is ill-formed.
+            UnicodeDecodeError: If the reason isn't valid UTF-8.
+
+        """
+        if len(data) >= 2:
+            (code,) = struct.unpack("!H", data[:2])
+            reason = data[2:].decode()
+            close = cls(code, reason)
+            close.check()
+            return close
+        elif len(data) == 0:
+            return cls(CloseCode.NO_STATUS_RCVD, "")
+        else:
+            raise ProtocolError("close frame too short")
+
+    def serialize(self) -> bytes:
+        """
+        Serialize the payload of a close frame.
+
+        """
+        self.check()
+        return struct.pack("!H", self.code) + self.reason.encode()
+
+    def check(self) -> None:
+        """
+        Check that the close code has a valid value for a close frame.
+
+        Raises:
+            ProtocolError: If the close code is invalid.
+
+        """
+        if not (self.code in EXTERNAL_CLOSE_CODES or 3000 <= self.code < 5000):
+            raise ProtocolError("invalid status code")
+
+
+# At the bottom to break import cycles created by type annotations.
+from . import extensions  # noqa: E402