Viewing file:  web_exceptions.py (9.87 KB) -rw-r--r--
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import warnings
from typing import Any, Dict, Iterable, List, Optional, Set # noqa
from yarl import URL
from .typedefs import LooseHeaders, StrOrURL
from .web_response import Response
__all__ = (
"HTTPException",
"HTTPError",
"HTTPRedirection",
"HTTPSuccessful",
"HTTPOk",
"HTTPCreated",
"HTTPAccepted",
"HTTPNonAuthoritativeInformation",
"HTTPNoContent",
"HTTPResetContent",
"HTTPPartialContent",
"HTTPMultipleChoices",
"HTTPMovedPermanently",
"HTTPFound",
"HTTPSeeOther",
"HTTPNotModified",
"HTTPUseProxy",
"HTTPTemporaryRedirect",
"HTTPPermanentRedirect",
"HTTPClientError",
"HTTPBadRequest",
"HTTPUnauthorized",
"HTTPPaymentRequired",
"HTTPForbidden",
"HTTPNotFound",
"HTTPMethodNotAllowed",
"HTTPNotAcceptable",
"HTTPProxyAuthenticationRequired",
"HTTPRequestTimeout",
"HTTPConflict",
"HTTPGone",
"HTTPLengthRequired",
"HTTPPreconditionFailed",
"HTTPRequestEntityTooLarge",
"HTTPRequestURITooLong",
"HTTPUnsupportedMediaType",
"HTTPRequestRangeNotSatisfiable",
"HTTPExpectationFailed",
"HTTPMisdirectedRequest",
"HTTPUnprocessableEntity",
"HTTPFailedDependency",
"HTTPUpgradeRequired",
"HTTPPreconditionRequired",
"HTTPTooManyRequests",
"HTTPRequestHeaderFieldsTooLarge",
"HTTPUnavailableForLegalReasons",
"HTTPServerError",
"HTTPInternalServerError",
"HTTPNotImplemented",
"HTTPBadGateway",
"HTTPServiceUnavailable",
"HTTPGatewayTimeout",
"HTTPVersionNotSupported",
"HTTPVariantAlsoNegotiates",
"HTTPInsufficientStorage",
"HTTPNotExtended",
"HTTPNetworkAuthenticationRequired",
)
############################################################
# HTTP Exceptions
############################################################
class HTTPException(Response, Exception):
# You should set in subclasses:
# status = 200
status_code = -1
empty_body = False
__http_exception__ = True
def __init__(
self,
*,
headers: Optional[LooseHeaders] = None,
reason: Optional[str] = None,
body: Any = None,
text: Optional[str] = None,
content_type: Optional[str] = None,
) -> None:
if body is not None:
warnings.warn(
"body argument is deprecated for http web exceptions",
DeprecationWarning,
)
Response.__init__(
self,
status=self.status_code,
headers=headers,
reason=reason,
body=body,
text=text,
content_type=content_type,
)
Exception.__init__(self, self.reason)
if self.body is None and not self.empty_body:
self.text = f"{self.status}: {self.reason}"
def __bool__(self) -> bool:
return True
class HTTPError(HTTPException):
"""Base class for exceptions with status codes in the 400s and 500s."""
class HTTPRedirection(HTTPException):
"""Base class for exceptions with status codes in the 300s."""
class HTTPSuccessful(HTTPException):
"""Base class for exceptions with status codes in the 200s."""
class HTTPOk(HTTPSuccessful):
status_code = 200
class HTTPCreated(HTTPSuccessful):
status_code = 201
class HTTPAccepted(HTTPSuccessful):
status_code = 202
class HTTPNonAuthoritativeInformation(HTTPSuccessful):
status_code = 203
class HTTPNoContent(HTTPSuccessful):
status_code = 204
empty_body = True
class HTTPResetContent(HTTPSuccessful):
status_code = 205
empty_body = True
class HTTPPartialContent(HTTPSuccessful):
status_code = 206
############################################################
# 3xx redirection
############################################################
class _HTTPMove(HTTPRedirection):
def __init__(
self,
location: StrOrURL,
*,
headers: Optional[LooseHeaders] = None,
reason: Optional[str] = None,
body: Any = None,
text: Optional[str] = None,
content_type: Optional[str] = None,
) -> None:
if not location:
raise ValueError("HTTP redirects need a location to redirect to.")
super().__init__(
headers=headers,
reason=reason,
body=body,
text=text,
content_type=content_type,
)
self.headers["Location"] = str(URL(location))
self.location = location
class HTTPMultipleChoices(_HTTPMove):
status_code = 300
class HTTPMovedPermanently(_HTTPMove):
status_code = 301
class HTTPFound(_HTTPMove):
status_code = 302
# This one is safe after a POST (the redirected location will be
# retrieved with GET):
class HTTPSeeOther(_HTTPMove):
status_code = 303
class HTTPNotModified(HTTPRedirection):
# FIXME: this should include a date or etag header
status_code = 304
empty_body = True
class HTTPUseProxy(_HTTPMove):
# Not a move, but looks a little like one
status_code = 305
class HTTPTemporaryRedirect(_HTTPMove):
status_code = 307
class HTTPPermanentRedirect(_HTTPMove):
status_code = 308
############################################################
# 4xx client error
############################################################
class HTTPClientError(HTTPError):
pass
class HTTPBadRequest(HTTPClientError):
status_code = 400
class HTTPUnauthorized(HTTPClientError):
status_code = 401
class HTTPPaymentRequired(HTTPClientError):
status_code = 402
class HTTPForbidden(HTTPClientError):
status_code = 403
class HTTPNotFound(HTTPClientError):
status_code = 404
class HTTPMethodNotAllowed(HTTPClientError):
status_code = 405
def __init__(
self,
method: str,
allowed_methods: Iterable[str],
*,
headers: Optional[LooseHeaders] = None,
reason: Optional[str] = None,
body: Any = None,
text: Optional[str] = None,
content_type: Optional[str] = None,
) -> None:
allow = ",".join(sorted(allowed_methods))
super().__init__(
headers=headers,
reason=reason,
body=body,
text=text,
content_type=content_type,
)
self.headers["Allow"] = allow
self.allowed_methods = set(allowed_methods) # type: Set[str]
self.method = method.upper()
class HTTPNotAcceptable(HTTPClientError):
status_code = 406
class HTTPProxyAuthenticationRequired(HTTPClientError):
status_code = 407
class HTTPRequestTimeout(HTTPClientError):
status_code = 408
class HTTPConflict(HTTPClientError):
status_code = 409
class HTTPGone(HTTPClientError):
status_code = 410
class HTTPLengthRequired(HTTPClientError):
status_code = 411
class HTTPPreconditionFailed(HTTPClientError):
status_code = 412
class HTTPRequestEntityTooLarge(HTTPClientError):
status_code = 413
def __init__(self, max_size: float, actual_size: float, **kwargs: Any) -> None:
kwargs.setdefault(
"text",
"Maximum request body size {} exceeded, "
"actual body size {}".format(max_size, actual_size),
)
super().__init__(**kwargs)
class HTTPRequestURITooLong(HTTPClientError):
status_code = 414
class HTTPUnsupportedMediaType(HTTPClientError):
status_code = 415
class HTTPRequestRangeNotSatisfiable(HTTPClientError):
status_code = 416
class HTTPExpectationFailed(HTTPClientError):
status_code = 417
class HTTPMisdirectedRequest(HTTPClientError):
status_code = 421
class HTTPUnprocessableEntity(HTTPClientError):
status_code = 422
class HTTPFailedDependency(HTTPClientError):
status_code = 424
class HTTPUpgradeRequired(HTTPClientError):
status_code = 426
class HTTPPreconditionRequired(HTTPClientError):
status_code = 428
class HTTPTooManyRequests(HTTPClientError):
status_code = 429
class HTTPRequestHeaderFieldsTooLarge(HTTPClientError):
status_code = 431
class HTTPUnavailableForLegalReasons(HTTPClientError):
status_code = 451
def __init__(
self,
link: str,
*,
headers: Optional[LooseHeaders] = None,
reason: Optional[str] = None,
body: Any = None,
text: Optional[str] = None,
content_type: Optional[str] = None,
) -> None:
super().__init__(
headers=headers,
reason=reason,
body=body,
text=text,
content_type=content_type,
)
self.headers["Link"] = '<%s>; rel="blocked-by"' % link
self.link = link
############################################################
# 5xx Server Error
############################################################
# Response status codes beginning with the digit "5" indicate cases in
# which the server is aware that it has erred or is incapable of
# performing the request. Except when responding to a HEAD request, the
# server SHOULD include an entity containing an explanation of the error
# situation, and whether it is a temporary or permanent condition. User
# agents SHOULD display any included entity to the user. These response
# codes are applicable to any request method.
class HTTPServerError(HTTPError):
pass
class HTTPInternalServerError(HTTPServerError):
status_code = 500
class HTTPNotImplemented(HTTPServerError):
status_code = 501
class HTTPBadGateway(HTTPServerError):
status_code = 502
class HTTPServiceUnavailable(HTTPServerError):
status_code = 503
class HTTPGatewayTimeout(HTTPServerError):
status_code = 504
class HTTPVersionNotSupported(HTTPServerError):
status_code = 505
class HTTPVariantAlsoNegotiates(HTTPServerError):
status_code = 506
class HTTPInsufficientStorage(HTTPServerError):
status_code = 507
class HTTPNotExtended(HTTPServerError):
status_code = 510
class HTTPNetworkAuthenticationRequired(HTTPServerError):
status_code = 511
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