def _positive_non_zero_float(argument_value):
if argument_value is None:
return None
try:
value = float(argument_value)
except ValueError:
msg = _("%s must be a float") % argument_value
raise argparse.ArgumentTypeError(msg)
if value <= 0:
msg = _("%s must be greater than 0") % argument_value
raise argparse.ArgumentTypeError(msg)
return value
def __init__(self, **kwargs):
for param in self._method_parameters:
setattr(self, param, kwargs.pop(param, None))
if kwargs:
msg = _("Unexpected Attributes: %s") % ", ".join(kwargs.keys())
raise AttributeError(msg)
class HttpServerError(HttpError):
"""Server-side HTTP error.
Exception for cases in which the server is aware that it has
erred or is incapable of performing the request.
"""
message = _("HTTP Server Error")
def get_version_data(session, url, authenticated=None):
"""Retrieve raw version data from a url."""
headers = {'Accept': 'application/json'}
resp = session.get(url, headers=headers, authenticated=authenticated)
try:
body_resp = resp.json()
except ValueError:
pass
else:
# In the event of querying a root URL we will get back a list of
# available versions.
try:
return body_resp['versions']['values']
except (KeyError, TypeError):
pass
# Most servers don't have a 'values' element so accept a simple
# versions dict if available.
try:
return body_resp['versions']
except KeyError:
pass
# Otherwise if we query an endpoint like /v2.0 then we will get back
# just the one available version.
try:
return [body_resp['version']]
except KeyError:
pass
err_text = resp.text[:50] + '...' if len(resp.text) > 50 else resp.text
msg = _('Invalid Response - Bad version data returned: %s') % err_text
raise exceptions.DiscoveryFailure(msg)
class InternalServerError(HttpServerError):
"""HTTP 500 - Internal Server Error.
A generic error message, given when no more specific message is suitable.
"""
http_status = 500
message = _("Internal Server Error")
def normalize_version_number(version):
"""Turn a version representation into a tuple."""
# trim the v from a 'v2.0' or similar
try:
version = version.lstrip('v')
except AttributeError:
pass
# if it's an integer or a numeric as a string then normalize it
# to a string, this ensures 1 decimal point
try:
num = float(version)
except Exception:
pass
else:
version = str(num)
# if it's a string (or an integer) from above break it on .
try:
return tuple(map(int, version.split('.')))
except Exception:
pass
# last attempt, maybe it's a list or iterable.
try:
return tuple(map(int, version))
except Exception:
pass
raise TypeError(_('Invalid version specified: %s') % version)
class ExpectationFailed(HTTPClientError):
"""HTTP 417 - Expectation Failed.
The server cannot meet the requirements of the Expect request-header field.
"""
http_status = 417
message = _("Expectation Failed")
class BadRequest(HTTPClientError):
"""HTTP 400 - Bad Request.
The request cannot be fulfilled due to bad syntax.
"""
http_status = 400
message = _("Bad Request")
class RequestUriTooLong(HTTPClientError):
"""HTTP 414 - Request-URI Too Long.
The URI provided was too long for the server to process.
"""
http_status = 414
message = _("Request-URI Too Long")
class PaymentRequired(HTTPClientError):
"""HTTP 402 - Payment Required.
Reserved for future use.
"""
http_status = 402
message = _("Payment Required")
class HttpVersionNotSupported(HttpServerError):
"""HTTP 505 - HttpVersion Not Supported.
The server does not support the HTTP protocol version used in the request.
"""
http_status = 505
message = _("HTTP Version Not Supported")
class RequestTimeout(HTTPClientError):
"""HTTP 408 - Request Timeout.
The server timed out waiting for the request.
"""
http_status = 408
message = _("Request Timeout")
class ServiceUnavailable(HttpServerError):
"""HTTP 503 - Service Unavailable.
The server is currently unavailable.
"""
http_status = 503
message = _("Service Unavailable")
class ProxyAuthenticationRequired(HTTPClientError):
"""HTTP 407 - Proxy Authentication Required.
The client must first authenticate itself with the proxy.
"""
http_status = 407
message = _("Proxy Authentication Required")
class RequestedRangeNotSatisfiable(HTTPClientError):
"""HTTP 416 - Requested Range Not Satisfiable.
The client has asked for a portion of the file, but the server cannot
supply that portion.
"""
http_status = 416
message = _("Requested Range Not Satisfiable")
class UnsupportedMediaType(HTTPClientError):
"""HTTP 415 - Unsupported Media Type.
The request entity has a media type which the server or resource does
not support.
"""
http_status = 415
message = _("Unsupported Media Type")
class HttpNotImplemented(HttpServerError):
"""HTTP 501 - Not Implemented.
The server either does not recognize the request method, or it lacks
the ability to fulfill the request.
"""
http_status = 501
message = _("Not Implemented")
class NotAcceptable(HTTPClientError):
"""HTTP 406 - Not Acceptable.
The requested resource is only capable of generating content not
acceptable according to the Accept headers sent in the request.
"""
http_status = 406
message = _("Not Acceptable")
class MethodNotAllowed(HTTPClientError):
"""HTTP 405 - Method Not Allowed.
A request was made of a resource using a request method not supported
by that resource.
"""
http_status = 405
message = _("Method Not Allowed")
class NotFound(HTTPClientError):
"""HTTP 404 - Not Found.
The requested resource could not be found but may be available again
in the future.
"""
http_status = 404
message = _("Not Found")
class Forbidden(HTTPClientError):
"""HTTP 403 - Forbidden.
The request was a valid request, but the server is refusing to respond
to it.
"""
http_status = 403
message = _("Forbidden")
class UnprocessableEntity(HTTPClientError):
"""HTTP 422 - Unprocessable Entity.
The request was well-formed but was unable to be followed due to semantic
errors.
"""
http_status = 422
message = _("Unprocessable Entity")
class Conflict(HTTPClientError):
"""HTTP 409 - Conflict.
Indicates that the request could not be processed because of conflict
in the request, such as an edit conflict.
"""
http_status = 409
message = _("Conflict")
class Unauthorized(HTTPClientError):
"""HTTP 401 - Unauthorized.
Similar to 403 Forbidden, but specifically for use when authentication
is required and has failed or has not yet been provided.
"""
http_status = 401
message = _("Unauthorized")
class BadGateway(HttpServerError):
"""HTTP 502 - Bad Gateway.
The server was acting as a gateway or proxy and received an invalid
response from the upstream server.
"""
http_status = 502
message = _("Bad Gateway")
class LengthRequired(HTTPClientError):
"""HTTP 411 - Length Required.
The request did not specify the length of its content, which is
required by the requested resource.
"""
http_status = 411
message = _("Length Required")
class GatewayTimeout(HttpServerError):
"""HTTP 504 - Gateway Timeout.
The server was acting as a gateway or proxy and did not receive a timely
response from the upstream server.
"""
http_status = 504
message = _("Gateway Timeout")
class PreconditionFailed(HTTPClientError):
"""HTTP 412 - Precondition Failed.
The server does not meet one of the preconditions that the requester
put on the request.
"""
http_status = 412
message = _("Precondition Failed")
class Gone(HTTPClientError):
"""HTTP 410 - Gone.
Indicates that the resource requested is no longer available and will
not be available again.
"""
http_status = 410
message = _("Gone")
def _auth_required(self, auth, msg):
if not auth:
auth = self.auth
if not auth:
msg_fmt = _('An auth plugin is required to %s')
raise exceptions.MissingAuthPlugin(msg_fmt % msg)
return auth
