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"""
h2/errors
~~~~~~~~~
Global error code registry containing the established HTTP/2 error codes.
The current registry is available at:
https://tools.ietf.org/html/rfc7540#section-11.4
"""
from __future__ import annotations
import enum
class ErrorCodes(enum.IntEnum):
"""
All known HTTP/2 error codes.
.. versionadded:: 2.5.0
"""
#: Graceful shutdown.
NO_ERROR = 0x0
#: Protocol error detected.
PROTOCOL_ERROR = 0x1
#: Implementation fault.
INTERNAL_ERROR = 0x2
#: Flow-control limits exceeded.
FLOW_CONTROL_ERROR = 0x3
#: Settings not acknowledged.
SETTINGS_TIMEOUT = 0x4
#: Frame received for closed stream.
STREAM_CLOSED = 0x5
#: Frame size incorrect.
FRAME_SIZE_ERROR = 0x6
#: Stream not processed.
REFUSED_STREAM = 0x7
#: Stream cancelled.
CANCEL = 0x8
#: Compression state not updated.
COMPRESSION_ERROR = 0x9
#: TCP connection error for CONNECT method.
CONNECT_ERROR = 0xa
#: Processing capacity exceeded.
ENHANCE_YOUR_CALM = 0xb
#: Negotiated TLS parameters not acceptable.
INADEQUATE_SECURITY = 0xc
#: Use HTTP/1.1 for the request.
HTTP_1_1_REQUIRED = 0xd
def _error_code_from_int(code: int) -> ErrorCodes | int:
"""
Given an integer error code, returns either one of :class:`ErrorCodes
<h2.errors.ErrorCodes>` or, if not present in the known set of codes,
returns the integer directly.
"""
try:
return ErrorCodes(code)
except ValueError:
return code
__all__ = ["ErrorCodes"]
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