alpcentaur
/
basabuuka_prototyp

# -*- coding: utf-8 -*-"""
    werkzeug.exceptions    ~~~~~~~~~~~~~~~~~~~
    This module implements a number of Python exceptions you can raise from    within your views to trigger a standard non-200 response.

    Usage Example    -------------
    ::
        from werkzeug.wrappers import BaseRequest        from werkzeug.wsgi import responder        from werkzeug.exceptions import HTTPException, NotFound
        def view(request):            raise NotFound()
        @responder        def application(environ, start_response):            request = BaseRequest(environ)            try:                return view(request)            except HTTPException as e:                return e

    As you can see from this example those exceptions are callable WSGI    applications.  Because of Python 2.4 compatibility those do not extend    from the response objects but only from the python exception class.
    As a matter of fact they are not Werkzeug response objects.  However you    can get a response object by calling ``get_response()`` on a HTTP    exception.
    Keep in mind that you have to pass an environment to ``get_response()``    because some errors fetch additional information from the WSGI    environment.
    If you want to hook in a different exception page to say, a 404 status    code, you can add a second except for a specific subclass of an error::
        @responder        def application(environ, start_response):            request = BaseRequest(environ)            try:                return view(request)            except NotFound, e:                return not_found(request)            except HTTPException, e:                return e

    :copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details.    :license: BSD, see LICENSE for more details."""
import sys
# Because of bootstrapping reasons we need to manually patch ourselves# onto our parent module.import werkzeugwerkzeug.exceptions = sys.modules[__name__]
from werkzeug._internal import _get_environfrom werkzeug._compat import iteritems, integer_types, text_type, \    implements_to_string
from werkzeug.wrappers import Response

@implements_to_stringclass HTTPException(Exception):
    """
    Baseclass for all HTTP exceptions.  This exception can be called as WSGI    application to render a default error page or you can catch the subclasses    of it independently and render nicer error messages.    """

    code = None    description = None
    def __init__(self, description=None, response=None):        Exception.__init__(self)        if description is not None:            self.description = description        self.response = response
    @classmethod    def wrap(cls, exception, name=None):        """This method returns a new subclass of the exception provided that
        also is a subclass of `BadRequest`.        """
        class newcls(cls, exception):
            def __init__(self, arg=None, *args, **kwargs):                cls.__init__(self, *args, **kwargs)                exception.__init__(self, arg)        newcls.__module__ = sys._getframe(1).f_globals.get('__name__')        newcls.__name__ = name or cls.__name__ + exception.__name__        return newcls
    @property    def name(self):        """The status name."""        return HTTP_STATUS_CODES.get(self.code, 'Unknown Error')
    def get_description(self, environ=None):        """Get the description."""        return u'<p>%s</p>' % escape(self.description)
    def get_body(self, environ=None):        """Get the HTML body."""        return text_type((            u'<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">\n'            u'<title>%(code)s %(name)s</title>\n'            u'<h1>%(name)s</h1>\n'            u'%(description)s\n'        ) % {            'code':         self.code,            'name':         escape(self.name),            'description':  self.get_description(environ)        })
    def get_headers(self, environ=None):        """Get a list of headers."""        return [('Content-Type', 'text/html')]
    def get_response(self, environ=None):        """Get a response object.  If one was passed to the exception
        it's returned directly.
        :param environ: the optional environ for the request.  This                        can be used to modify the response depending                        on how the request looked like.        :return: a :class:`Response` object or a subclass thereof.        """
        if self.response is not None:            return self.response        if environ is not None:            environ = _get_environ(environ)        headers = self.get_headers(environ)        return Response(self.get_body(environ), self.code, headers)
    def __call__(self, environ, start_response):        """Call the exception as WSGI application.

        :param environ: the WSGI environment.        :param start_response: the response callable provided by the WSGI                               server.        """
        response = self.get_response(environ)        return response(environ, start_response)
    def __str__(self):        code = self.code if self.code is not None else '???'        return '%s %s: %s' % (code, self.name, self.description)
    def __repr__(self):        code = self.code if self.code is not None else '???'        return "<%s '%s: %s'>" % (self.__class__.__name__, code, self.name)

class BadRequest(HTTPException):
    """*400* `Bad Request`

    Raise if the browser sends something to the application the application    or server cannot handle.    """
    code = 400    description = (        'The browser (or proxy) sent a request that this server could '        'not understand.'    )

class ClientDisconnected(BadRequest):
    """Internal exception that is raised if Werkzeug detects a disconnected
    client.  Since the client is already gone at that point attempting to    send the error message to the client might not work and might ultimately    result in another exception in the server.  Mainly this is here so that    it is silenced by default as far as Werkzeug is concerned.
    Since disconnections cannot be reliably detected and are unspecified    by WSGI to a large extent this might or might not be raised if a client    is gone.
    .. versionadded:: 0.8    """


class SecurityError(BadRequest):
    """Raised if something triggers a security error.  This is otherwise
    exactly like a bad request error.
    .. versionadded:: 0.9    """


class BadHost(BadRequest):
    """Raised if the submitted host is badly formatted.

    .. versionadded:: 0.11.2    """


class Unauthorized(HTTPException):
    """*401* `Unauthorized`

    Raise if the user is not authorized.  Also used if you want to use HTTP    basic auth.    """
    code = 401    description = (        'The server could not verify that you are authorized to access '        'the URL requested.  You either supplied the wrong credentials (e.g. '        'a bad password), or your browser doesn\'t understand how to supply '        'the credentials required.'    )

class Forbidden(HTTPException):
    """*403* `Forbidden`

    Raise if the user doesn't have the permission for the requested resource    but was authenticated.    """
    code = 403    description = (        'You don\'t have the permission to access the requested resource. '        'It is either read-protected or not readable by the server.'    )

class NotFound(HTTPException):
    """*404* `Not Found`

    Raise if a resource does not exist and never existed.    """
    code = 404    description = (        'The requested URL was not found on the server.  '        'If you entered the URL manually please check your spelling and '        'try again.'    )

class MethodNotAllowed(HTTPException):
    """*405* `Method Not Allowed`

    Raise if the server used a method the resource does not handle.  For    example `POST` if the resource is view only.  Especially useful for REST.
    The first argument for this exception should be a list of allowed methods.    Strictly speaking the response would be invalid if you don't provide valid    methods in the header which you can do with that list.    """
    code = 405    description = 'The method is not allowed for the requested URL.'
    def __init__(self, valid_methods=None, description=None):        """Takes an optional list of valid http methods
        starting with werkzeug 0.3 the list will be mandatory."""
        HTTPException.__init__(self, description)        self.valid_methods = valid_methods
    def get_headers(self, environ):        headers = HTTPException.get_headers(self, environ)        if self.valid_methods:            headers.append(('Allow', ', '.join(self.valid_methods)))        return headers

class NotAcceptable(HTTPException):
    """*406* `Not Acceptable`

    Raise if the server can't return any content conforming to the    `Accept` headers of the client.    """
    code = 406
    description = (        'The resource identified by the request is only capable of '        'generating response entities which have content characteristics '        'not acceptable according to the accept headers sent in the '        'request.'    )

class RequestTimeout(HTTPException):
    """*408* `Request Timeout`

    Raise to signalize a timeout.    """
    code = 408    description = (        'The server closed the network connection because the browser '        'didn\'t finish the request within the specified time.'    )

class Conflict(HTTPException):
    """*409* `Conflict`

    Raise to signal that a request cannot be completed because it conflicts    with the current state on the server.
    .. versionadded:: 0.7    """
    code = 409    description = (        'A conflict happened while processing the request.  The resource '        'might have been modified while the request was being processed.'    )

class Gone(HTTPException):
    """*410* `Gone`

    Raise if a resource existed previously and went away without new location.    """
    code = 410    description = (        'The requested URL is no longer available on this server and there '        'is no forwarding address. If you followed a link from a foreign '        'page, please contact the author of this page.'    )

class LengthRequired(HTTPException):
    """*411* `Length Required`

    Raise if the browser submitted data but no ``Content-Length`` header which    is required for the kind of processing the server does.    """
    code = 411    description = (        'A request with this method requires a valid <code>Content-'        'Length</code> header.'    )

class PreconditionFailed(HTTPException):
    """*412* `Precondition Failed`

    Status code used in combination with ``If-Match``, ``If-None-Match``, or    ``If-Unmodified-Since``.    """
    code = 412    description = (        'The precondition on the request for the URL failed positive '        'evaluation.'    )

class RequestEntityTooLarge(HTTPException):
    """*413* `Request Entity Too Large`

    The status code one should return if the data submitted exceeded a given    limit.    """
    code = 413    description = (        'The data value transmitted exceeds the capacity limit.'    )

class RequestURITooLarge(HTTPException):
    """*414* `Request URI Too Large`

    Like *413* but for too long URLs.    """
    code = 414    description = (        'The length of the requested URL exceeds the capacity limit '        'for this server.  The request cannot be processed.'    )

class UnsupportedMediaType(HTTPException):
    """*415* `Unsupported Media Type`

    The status code returned if the server is unable to handle the media type    the client transmitted.    """
    code = 415    description = (        'The server does not support the media type transmitted in '        'the request.'    )

class RequestedRangeNotSatisfiable(HTTPException):
    """*416* `Requested Range Not Satisfiable`

    The client asked for an invalid part of the file.
    .. versionadded:: 0.7    """
    code = 416    description = (        'The server cannot provide the requested range.'    )
    def __init__(self, length=None, units="bytes", description=None):        """Takes an optional `Content-Range` header value based on ``length``
        parameter.        """
        HTTPException.__init__(self, description)        self.length = length        self.units = units
    def get_headers(self, environ):        headers = HTTPException.get_headers(self, environ)        if self.length is not None:            headers.append(                ('Content-Range', '%s */%d' % (self.units, self.length)))        return headers

class ExpectationFailed(HTTPException):
    """*417* `Expectation Failed`

    The server cannot meet the requirements of the Expect request-header.
    .. versionadded:: 0.7    """
    code = 417    description = (        'The server could not meet the requirements of the Expect header'    )

class ImATeapot(HTTPException):
    """*418* `I'm a teapot`

    The server should return this if it is a teapot and someone attempted    to brew coffee with it.
    .. versionadded:: 0.7    """
    code = 418    description = (        'This server is a teapot, not a coffee machine'    )

class UnprocessableEntity(HTTPException):
    """*422* `Unprocessable Entity`

    Used if the request is well formed, but the instructions are otherwise    incorrect.    """
    code = 422    description = (        'The request was well-formed but was unable to be followed '        'due to semantic errors.'    )

class Locked(HTTPException):
    """*423* `Locked`

    Used if the resource that is being accessed is locked.    """
    code = 423    description = (        'The resource that is being accessed is locked.'    )

class PreconditionRequired(HTTPException):
    """*428* `Precondition Required`

    The server requires this request to be conditional, typically to prevent    the lost update problem, which is a race condition between two or more    clients attempting to update a resource through PUT or DELETE. By requiring    each client to include a conditional header ("If-Match" or "If-Unmodified-    Since") with the proper value retained from a recent GET request, the    server ensures that each client has at least seen the previous revision of    the resource.    """
    code = 428    description = (        'This request is required to be conditional; try using "If-Match" '        'or "If-Unmodified-Since".'    )

class TooManyRequests(HTTPException):
    """*429* `Too Many Requests`

    The server is limiting the rate at which this user receives responses, and    this request exceeds that rate. (The server may use any convenient method    to identify users and their request rates). The server may include a    "Retry-After" header to indicate how long the user should wait before    retrying.    """
    code = 429    description = (        'This user has exceeded an allotted request count. Try again later.'    )

class RequestHeaderFieldsTooLarge(HTTPException):
    """*431* `Request Header Fields Too Large`

    The server refuses to process the request because the header fields are too    large. One or more individual fields may be too large, or the set of all    headers is too large.    """
    code = 431    description = (        'One or more header fields exceeds the maximum size.'    )

class UnavailableForLegalReasons(HTTPException):
    """*451* `Unavailable For Legal Reasons`

    This status code indicates that the server is denying access to the    resource as a consequence of a legal demand.    """
    code = 451    description = (        'Unavailable for legal reasons.'    )

class InternalServerError(HTTPException):
    """*500* `Internal Server Error`

    Raise if an internal server error occurred.  This is a good fallback if an    unknown error occurred in the dispatcher.    """
    code = 500    description = (        'The server encountered an internal error and was unable to '        'complete your request.  Either the server is overloaded or there '        'is an error in the application.'    )

class NotImplemented(HTTPException):
    """*501* `Not Implemented`

    Raise if the application does not support the action requested by the    browser.    """
    code = 501    description = (        'The server does not support the action requested by the '        'browser.'    )

class BadGateway(HTTPException):
    """*502* `Bad Gateway`

    If you do proxying in your application you should return this status code    if you received an invalid response from the upstream server it accessed    in attempting to fulfill the request.    """
    code = 502    description = (        'The proxy server received an invalid response from an upstream '        'server.'    )

class ServiceUnavailable(HTTPException):
    """*503* `Service Unavailable`

    Status code you should return if a service is temporarily unavailable.    """
    code = 503    description = (        'The server is temporarily unable to service your request due to '        'maintenance downtime or capacity problems.  Please try again '        'later.'    )

class GatewayTimeout(HTTPException):
    """*504* `Gateway Timeout`

    Status code you should return if a connection to an upstream server    times out.    """
    code = 504    description = (        'The connection to an upstream server timed out.'    )

class HTTPVersionNotSupported(HTTPException):
    """*505* `HTTP Version Not Supported`

    The server does not support the HTTP protocol version used in the request.    """
    code = 505    description = (        'The server does not support the HTTP protocol version used in the '        'request.'    )

default_exceptions = {}__all__ = ['HTTPException']

def _find_exceptions():    for name, obj in iteritems(globals()):        try:            is_http_exception = issubclass(obj, HTTPException)        except TypeError:            is_http_exception = False        if not is_http_exception or obj.code is None:            continue        __all__.append(obj.__name__)        old_obj = default_exceptions.get(obj.code, None)        if old_obj is not None and issubclass(obj, old_obj):            continue        default_exceptions[obj.code] = obj_find_exceptions()del _find_exceptions

class Aborter(object):
    """
    When passed a dict of code -> exception items it can be used as    callable that raises exceptions.  If the first argument to the    callable is an integer it will be looked up in the mapping, if it's    a WSGI application it will be raised in a proxy exception.
    The rest of the arguments are forwarded to the exception constructor.    """

    def __init__(self, mapping=None, extra=None):        if mapping is None:            mapping = default_exceptions        self.mapping = dict(mapping)        if extra is not None:            self.mapping.update(extra)
    def __call__(self, code, *args, **kwargs):        if not args and not kwargs and not isinstance(code, integer_types):            raise HTTPException(response=code)        if code not in self.mapping:            raise LookupError('no exception for %r' % code)        raise self.mapping[code](*args, **kwargs)

def abort(status, *args, **kwargs):    '''
    Raises an :py:exc:`HTTPException` for the given status code or WSGI    application::
        abort(404)  # 404 Not Found        abort(Response('Hello World'))
    Can be passed a WSGI application or a status code.  If a status code is    given it's looked up in the list of exceptions and will raise that    exception, if passed a WSGI application it will wrap it in a proxy WSGI    exception and raise that::
       abort(404)       abort(Response('Hello World'))
    '''
    return _aborter(status, *args, **kwargs)
_aborter = Aborter()

#: an exception that is used internally to signal both a key error and a#: bad request.  Used by a lot of the datastructures.BadRequestKeyError = BadRequest.wrap(KeyError)

# imported here because of circular dependencies of werkzeug.utilsfrom werkzeug.utils import escapefrom werkzeug.http import HTTP_STATUS_CODES