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Edit File : exceptions.py \| Size : 9.41 KB
from __future__ import annotations import socket import typing import warnings from email.errors import MessageDefect from http.client import IncompleteRead as httplib_IncompleteRead if typing.TYPE_CHECKING: from .connection import HTTPConnection from .connectionpool import ConnectionPool from .response import HTTPResponse from .util.retry import Retry # Base Exceptions class HTTPError(Exception): """Base exception used by this module.""" class HTTPWarning(Warning): """Base warning used by this module.""" _TYPE_REDUCE_RESULT = tuple[typing.Callable[..., object], tuple[object, ...]] class PoolError(HTTPError): """Base exception for errors caused within a pool.""" def __init__(self, pool: ConnectionPool, message: str) -> None: self.pool = pool super().__init__(f"{pool}: {message}") def __reduce__(self) -> _TYPE_REDUCE_RESULT: # For pickling purposes. return self.__class__, (None, None) class RequestError(PoolError): """Base exception for PoolErrors that have associated URLs.""" def __init__(self, pool: ConnectionPool, url: str, message: str) -> None: self.url = url super().__init__(pool, message) def __reduce__(self) -> _TYPE_REDUCE_RESULT: # For pickling purposes. return self.__class__, (None, self.url, None) class SSLError(HTTPError): """Raised when SSL certificate fails in an HTTPS connection.""" class ProxyError(HTTPError): """Raised when the connection to a proxy fails.""" # The original error is also available as __cause__. original_error: Exception def __init__(self, message: str, error: Exception) -> None: super().__init__(message, error) self.original_error = error class DecodeError(HTTPError): """Raised when automatic decoding based on Content-Type fails.""" class ProtocolError(HTTPError): """Raised when something unexpected happens mid-request/response.""" #: Renamed to ProtocolError but aliased for backwards compatibility. ConnectionError = ProtocolError # Leaf Exceptions class MaxRetryError(RequestError): """Raised when the maximum number of retries is exceeded. :param pool: The connection pool :type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool` :param str url: The requested Url :param reason: The underlying error :type reason: :class:`Exception` """ def __init__( self, pool: ConnectionPool, url: str, reason: Exception \| None = None ) -> None: self.reason = reason message = f"Max retries exceeded with url: {url} (Caused by {reason!r})" super().__init__(pool, url, message) class HostChangedError(RequestError): """Raised when an existing pool gets a request for a foreign host.""" def __init__( self, pool: ConnectionPool, url: str, retries: Retry \| int = 3 ) -> None: message = f"Tried to open a foreign host with url: {url}" super().__init__(pool, url, message) self.retries = retries class TimeoutStateError(HTTPError): """Raised when passing an invalid state to a timeout""" class TimeoutError(HTTPError): """Raised when a socket timeout error occurs. Catching this error will catch both :exc:`ReadTimeoutErrors <ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`. """ class ReadTimeoutError(TimeoutError, RequestError): """Raised when a socket timeout occurs while receiving data from a server""" # This timeout error does not have a URL attached and needs to inherit from the # base HTTPError class ConnectTimeoutError(TimeoutError): """Raised when a socket timeout occurs while connecting to a server""" class NewConnectionError(ConnectTimeoutError, HTTPError): """Raised when we fail to establish a new connection. Usually ECONNREFUSED.""" def __init__(self, conn: HTTPConnection, message: str) -> None: self.conn = conn super().__init__(f"{conn}: {message}") def __reduce__(self) -> _TYPE_REDUCE_RESULT: # For pickling purposes. return self.__class__, (None, None) @property def pool(self) -> HTTPConnection: warnings.warn( "The 'pool' property is deprecated and will be removed " "in urllib3 v2.1.0. Use 'conn' instead.", DeprecationWarning, stacklevel=2, ) return self.conn class NameResolutionError(NewConnectionError): """Raised when host name resolution fails.""" def __init__(self, host: str, conn: HTTPConnection, reason: socket.gaierror): message = f"Failed to resolve '{host}' ({reason})" super().__init__(conn, message) def __reduce__(self) -> _TYPE_REDUCE_RESULT: # For pickling purposes. return self.__class__, (None, None, None) class EmptyPoolError(PoolError): """Raised when a pool runs out of connections and no more are allowed.""" class FullPoolError(PoolError): """Raised when we try to add a connection to a full pool in blocking mode.""" class ClosedPoolError(PoolError): """Raised when a request enters a pool after the pool has been closed.""" class LocationValueError(ValueError, HTTPError): """Raised when there is something wrong with a given URL input.""" class LocationParseError(LocationValueError): """Raised when get_host or similar fails to parse the URL input.""" def __init__(self, location: str) -> None: message = f"Failed to parse: {location}" super().__init__(message) self.location = location class URLSchemeUnknown(LocationValueError): """Raised when a URL input has an unsupported scheme.""" def __init__(self, scheme: str): message = f"Not supported URL scheme {scheme}" super().__init__(message) self.scheme = scheme class ResponseError(HTTPError): """Used as a container for an error reason supplied in a MaxRetryError.""" GENERIC_ERROR = "too many error responses" SPECIFIC_ERROR = "too many {status_code} error responses" class SecurityWarning(HTTPWarning): """Warned when performing security reducing actions""" class InsecureRequestWarning(SecurityWarning): """Warned when making an unverified HTTPS request.""" class NotOpenSSLWarning(SecurityWarning): """Warned when using unsupported SSL library""" class SystemTimeWarning(SecurityWarning): """Warned when system time is suspected to be wrong""" class InsecurePlatformWarning(SecurityWarning): """Warned when certain TLS/SSL configuration is not available on a platform.""" class DependencyWarning(HTTPWarning): """ Warned when an attempt is made to import a module with missing optional dependencies. """ class ResponseNotChunked(ProtocolError, ValueError): """Response needs to be chunked in order to read it as chunks.""" class BodyNotHttplibCompatible(HTTPError): """ Body should be :class:`http.client.HTTPResponse` like (have an fp attribute which returns raw chunks) for read_chunked(). """ class IncompleteRead(HTTPError, httplib_IncompleteRead): """ Response length doesn't match expected Content-Length Subclass of :class:`http.client.IncompleteRead` to allow int value for ``partial`` to avoid creating large objects on streamed reads. """ partial: int # type: ignore[assignment] expected: int def __init__(self, partial: int, expected: int) -> None: self.partial = partial self.expected = expected def __repr__(self) -> str: return "IncompleteRead(%i bytes read, %i more expected)" % ( self.partial, self.expected, ) class InvalidChunkLength(HTTPError, httplib_IncompleteRead): """Invalid chunk length in a chunked response.""" def __init__(self, response: HTTPResponse, length: bytes) -> None: self.partial: int = response.tell() # type: ignore[assignment] self.expected: int \| None = response.length_remaining self.response = response self.length = length def __repr__(self) -> str: return "InvalidChunkLength(got length %r, %i bytes read)" % ( self.length, self.partial, ) class InvalidHeader(HTTPError): """The header provided was somehow invalid.""" class ProxySchemeUnknown(AssertionError, URLSchemeUnknown): """ProxyManager does not support the supplied scheme""" # TODO(t-8ch): Stop inheriting from AssertionError in v2.0. def __init__(self, scheme: str \| None) -> None: # 'localhost' is here because our URL parser parses # localhost:8080 -> scheme=localhost, remove if we fix this. if scheme == "localhost": scheme = None if scheme is None: message = "Proxy URL had no scheme, should start with http:// or https://" else: message = f"Proxy URL had unsupported scheme {scheme}, should use http:// or https://" super().__init__(message) class ProxySchemeUnsupported(ValueError): """Fetching HTTPS resources through HTTPS proxies is unsupported""" class HeaderParsingError(HTTPError): """Raised by assert_header_parsing, but we convert it to a log.warning statement.""" def __init__( self, defects: list[MessageDefect], unparsed_data: bytes \| str \| None ) -> None: message = f"{defects or 'Unknown'}, unparsed data: {unparsed_data!r}" super().__init__(message) class UnrewindableBodyError(HTTPError): """urllib3 encountered an error when trying to rewind a body""" Back

Edit File : exceptions.py | Size : 9.41 KB

from __future__ import annotations

import socket
import typing
import warnings
from email.errors import MessageDefect
from http.client import IncompleteRead as httplib_IncompleteRead

if typing.TYPE_CHECKING:
    from .connection import HTTPConnection
    from .connectionpool import ConnectionPool
    from .response import HTTPResponse
    from .util.retry import Retry

# Base Exceptions

class HTTPError(Exception):
    """Base exception used by this module."""

class HTTPWarning(Warning):
    """Base warning used by this module."""

_TYPE_REDUCE_RESULT = tuple[typing.Callable[..., object], tuple[object, ...]]

class PoolError(HTTPError):
    """Base exception for errors caused within a pool."""

def __init__(self, pool: ConnectionPool, message: str) -> None:
        self.pool = pool
        super().__init__(f"{pool}: {message}")

def __reduce__(self) -> _TYPE_REDUCE_RESULT:
        # For pickling purposes.
        return self.__class__, (None, None)

class RequestError(PoolError):
    """Base exception for PoolErrors that have associated URLs."""

def __init__(self, pool: ConnectionPool, url: str, message: str) -> None:
        self.url = url
        super().__init__(pool, message)

def __reduce__(self) -> _TYPE_REDUCE_RESULT:
        # For pickling purposes.
        return self.__class__, (None, self.url, None)

class SSLError(HTTPError):
    """Raised when SSL certificate fails in an HTTPS connection."""

class ProxyError(HTTPError):
    """Raised when the connection to a proxy fails."""

# The original error is also available as __cause__.
    original_error: Exception

def __init__(self, message: str, error: Exception) -> None:
        super().__init__(message, error)
        self.original_error = error

class DecodeError(HTTPError):
    """Raised when automatic decoding based on Content-Type fails."""

class ProtocolError(HTTPError):
    """Raised when something unexpected happens mid-request/response."""

#: Renamed to ProtocolError but aliased for backwards compatibility.
ConnectionError = ProtocolError

# Leaf Exceptions

class MaxRetryError(RequestError):
    """Raised when the maximum number of retries is exceeded.

:param pool: The connection pool
    :type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool`
    :param str url: The requested Url
    :param reason: The underlying error
    :type reason: :class:`Exception`

"""

def __init__(
        self, pool: ConnectionPool, url: str, reason: Exception | None = None
    ) -> None:
        self.reason = reason

message = f"Max retries exceeded with url: {url} (Caused by {reason!r})"

super().__init__(pool, url, message)

class HostChangedError(RequestError):
    """Raised when an existing pool gets a request for a foreign host."""

def __init__(
        self, pool: ConnectionPool, url: str, retries: Retry | int = 3
    ) -> None:
        message = f"Tried to open a foreign host with url: {url}"
        super().__init__(pool, url, message)
        self.retries = retries

class TimeoutStateError(HTTPError):
    """Raised when passing an invalid state to a timeout"""

class TimeoutError(HTTPError):
    """Raised when a socket timeout error occurs.

Catching this error will catch both :exc:`ReadTimeoutErrors
    <ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.
    """

class ReadTimeoutError(TimeoutError, RequestError):
    """Raised when a socket timeout occurs while receiving data from a server"""

# This timeout error does not have a URL attached and needs to inherit from the
# base HTTPError
class ConnectTimeoutError(TimeoutError):
    """Raised when a socket timeout occurs while connecting to a server"""

class NewConnectionError(ConnectTimeoutError, HTTPError):
    """Raised when we fail to establish a new connection. Usually ECONNREFUSED."""

def __init__(self, conn: HTTPConnection, message: str) -> None:
        self.conn = conn
        super().__init__(f"{conn}: {message}")

def __reduce__(self) -> _TYPE_REDUCE_RESULT:
        # For pickling purposes.
        return self.__class__, (None, None)

@property
    def pool(self) -> HTTPConnection:
        warnings.warn(
            "The 'pool' property is deprecated and will be removed "
            "in urllib3 v2.1.0. Use 'conn' instead.",
            DeprecationWarning,
            stacklevel=2,
        )

return self.conn

class NameResolutionError(NewConnectionError):
    """Raised when host name resolution fails."""

def __init__(self, host: str, conn: HTTPConnection, reason: socket.gaierror):
        message = f"Failed to resolve '{host}' ({reason})"
        super().__init__(conn, message)

def __reduce__(self) -> _TYPE_REDUCE_RESULT:
        # For pickling purposes.
        return self.__class__, (None, None, None)

class EmptyPoolError(PoolError):
    """Raised when a pool runs out of connections and no more are allowed."""

class FullPoolError(PoolError):
    """Raised when we try to add a connection to a full pool in blocking mode."""

class ClosedPoolError(PoolError):
    """Raised when a request enters a pool after the pool has been closed."""

class LocationValueError(ValueError, HTTPError):
    """Raised when there is something wrong with a given URL input."""

class LocationParseError(LocationValueError):
    """Raised when get_host or similar fails to parse the URL input."""

def __init__(self, location: str) -> None:
        message = f"Failed to parse: {location}"
        super().__init__(message)

self.location = location

class URLSchemeUnknown(LocationValueError):
    """Raised when a URL input has an unsupported scheme."""

def __init__(self, scheme: str):
        message = f"Not supported URL scheme {scheme}"
        super().__init__(message)

self.scheme = scheme

class ResponseError(HTTPError):
    """Used as a container for an error reason supplied in a MaxRetryError."""

GENERIC_ERROR = "too many error responses"
    SPECIFIC_ERROR = "too many {status_code} error responses"

class SecurityWarning(HTTPWarning):
    """Warned when performing security reducing actions"""

class InsecureRequestWarning(SecurityWarning):
    """Warned when making an unverified HTTPS request."""

class NotOpenSSLWarning(SecurityWarning):
    """Warned when using unsupported SSL library"""

class SystemTimeWarning(SecurityWarning):
    """Warned when system time is suspected to be wrong"""

class InsecurePlatformWarning(SecurityWarning):
    """Warned when certain TLS/SSL configuration is not available on a platform."""

class DependencyWarning(HTTPWarning):
    """
    Warned when an attempt is made to import a module with missing optional
    dependencies.
    """

class ResponseNotChunked(ProtocolError, ValueError):
    """Response needs to be chunked in order to read it as chunks."""

class BodyNotHttplibCompatible(HTTPError):
    """
    Body should be :class:`http.client.HTTPResponse` like
    (have an fp attribute which returns raw chunks) for read_chunked().
    """

class IncompleteRead(HTTPError, httplib_IncompleteRead):
    """
    Response length doesn't match expected Content-Length

Subclass of :class:`http.client.IncompleteRead` to allow int value
    for ``partial`` to avoid creating large objects on streamed reads.
    """

partial: int  # type: ignore[assignment]
    expected: int

def __init__(self, partial: int, expected: int) -> None:
        self.partial = partial
        self.expected = expected

def __repr__(self) -> str:
        return "IncompleteRead(%i bytes read, %i more expected)" % (
            self.partial,
            self.expected,
        )

class InvalidChunkLength(HTTPError, httplib_IncompleteRead):
    """Invalid chunk length in a chunked response."""

def __init__(self, response: HTTPResponse, length: bytes) -> None:
        self.partial: int = response.tell()  # type: ignore[assignment]
        self.expected: int | None = response.length_remaining
        self.response = response
        self.length = length

def __repr__(self) -> str:
        return "InvalidChunkLength(got length %r, %i bytes read)" % (
            self.length,
            self.partial,
        )

class InvalidHeader(HTTPError):
    """The header provided was somehow invalid."""

class ProxySchemeUnknown(AssertionError, URLSchemeUnknown):
    """ProxyManager does not support the supplied scheme"""

# TODO(t-8ch): Stop inheriting from AssertionError in v2.0.

def __init__(self, scheme: str | None) -> None:
        # 'localhost' is here because our URL parser parses
        # localhost:8080 -> scheme=localhost, remove if we fix this.
        if scheme == "localhost":
            scheme = None
        if scheme is None:
            message = "Proxy URL had no scheme, should start with http:// or https://"
        else:
            message = f"Proxy URL had unsupported scheme {scheme}, should use http:// or https://"
        super().__init__(message)

class ProxySchemeUnsupported(ValueError):
    """Fetching HTTPS resources through HTTPS proxies is unsupported"""

class HeaderParsingError(HTTPError):
    """Raised by assert_header_parsing, but we convert it to a log.warning statement."""

def __init__(
        self, defects: list[MessageDefect], unparsed_data: bytes | str | None
    ) -> None:
        message = f"{defects or 'Unknown'}, unparsed data: {unparsed_data!r}"
        super().__init__(message)

class UnrewindableBodyError(HTTPError):
    """urllib3 encountered an error when trying to rewind a body"""

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