exception.py 14 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476
# Copyright (c) 2006-2010 Mitch Garnaat http://garnaat.org/
# Copyright (c) 2010, Eucalyptus Systems, Inc.
# All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.

"""
Exception classes - Subclassing allows you to check for specific errors
"""
import base64
import xml.sax
from boto import handler
from boto.resultset import ResultSet


class BotoClientError(StandardError):
    """
    General Boto Client error (error accessing AWS)
    """

    def __init__(self, reason, *args):
        StandardError.__init__(self, reason, *args)
        self.reason = reason

    def __repr__(self):
        return 'BotoClientError: %s' % self.reason

    def __str__(self):
        return 'BotoClientError: %s' % self.reason

class SDBPersistenceError(StandardError):

    pass

class StoragePermissionsError(BotoClientError):
    """
    Permissions error when accessing a bucket or key on a storage service.
    """
    pass

class S3PermissionsError(StoragePermissionsError):
    """
    Permissions error when accessing a bucket or key on S3.
    """
    pass

class GSPermissionsError(StoragePermissionsError):
    """
    Permissions error when accessing a bucket or key on GS.
    """
    pass

class BotoServerError(StandardError):

    def __init__(self, status, reason, body=None, *args):
        StandardError.__init__(self, status, reason, body, *args)
        self.status = status
        self.reason = reason
        self.body = body or ''
        self.request_id = None
        self.error_code = None
        self.error_message = None
        self.box_usage = None

        # Attempt to parse the error response. If body isn't present,
        # then just ignore the error response.
        if self.body:
            try:
                h = handler.XmlHandler(self, self)
                xml.sax.parseString(self.body, h)
            except (TypeError, xml.sax.SAXParseException), pe:
                # Remove unparsable message body so we don't include garbage
                # in exception. But first, save self.body in self.error_message
                # because occasionally we get error messages from Eucalyptus
                # that are just text strings that we want to preserve.
                self.error_message = self.body
                self.body = None

    def __getattr__(self, name):
        if name == 'message':
            return self.error_message
        if name == 'code':
            return self.error_code
        raise AttributeError

    def __repr__(self):
        return '%s: %s %s\n%s' % (self.__class__.__name__,
                                  self.status, self.reason, self.body)

    def __str__(self):
        return '%s: %s %s\n%s' % (self.__class__.__name__,
                                  self.status, self.reason, self.body)

    def startElement(self, name, attrs, connection):
        pass

    def endElement(self, name, value, connection):
        if name in ('RequestId', 'RequestID'):
            self.request_id = value
        elif name == 'Code':
            self.error_code = value
        elif name == 'Message':
            self.error_message = value
        elif name == 'BoxUsage':
            self.box_usage = value
        return None

    def _cleanupParsedProperties(self):
        self.request_id = None
        self.error_code = None
        self.error_message = None
        self.box_usage = None

class ConsoleOutput:

    def __init__(self, parent=None):
        self.parent = parent
        self.instance_id = None
        self.timestamp = None
        self.comment = None
        self.output = None

    def startElement(self, name, attrs, connection):
        return None

    def endElement(self, name, value, connection):
        if name == 'instanceId':
            self.instance_id = value
        elif name == 'output':
            self.output = base64.b64decode(value)
        else:
            setattr(self, name, value)

class StorageCreateError(BotoServerError):
    """
    Error creating a bucket or key on a storage service.
    """
    def __init__(self, status, reason, body=None):
        self.bucket = None
        BotoServerError.__init__(self, status, reason, body)

    def endElement(self, name, value, connection):
        if name == 'BucketName':
            self.bucket = value
        else:
            return BotoServerError.endElement(self, name, value, connection)

class S3CreateError(StorageCreateError):
    """
    Error creating a bucket or key on S3.
    """
    pass

class GSCreateError(StorageCreateError):
    """
    Error creating a bucket or key on GS.
    """
    pass

class StorageCopyError(BotoServerError):
    """
    Error copying a key on a storage service.
    """
    pass

class S3CopyError(StorageCopyError):
    """
    Error copying a key on S3.
    """
    pass

class GSCopyError(StorageCopyError):
    """
    Error copying a key on GS.
    """
    pass

class SQSError(BotoServerError):
    """
    General Error on Simple Queue Service.
    """
    def __init__(self, status, reason, body=None):
        self.detail = None
        self.type = None
        BotoServerError.__init__(self, status, reason, body)

    def startElement(self, name, attrs, connection):
        return BotoServerError.startElement(self, name, attrs, connection)

    def endElement(self, name, value, connection):
        if name == 'Detail':
            self.detail = value
        elif name == 'Type':
            self.type = value
        else:
            return BotoServerError.endElement(self, name, value, connection)

    def _cleanupParsedProperties(self):
        BotoServerError._cleanupParsedProperties(self)
        for p in ('detail', 'type'):
            setattr(self, p, None)

class SQSDecodeError(BotoClientError):
    """
    Error when decoding an SQS message.
    """
    def __init__(self, reason, message):
        BotoClientError.__init__(self, reason, message)
        self.message = message

    def __repr__(self):
        return 'SQSDecodeError: %s' % self.reason

    def __str__(self):
        return 'SQSDecodeError: %s' % self.reason

class StorageResponseError(BotoServerError):
    """
    Error in response from a storage service.
    """
    def __init__(self, status, reason, body=None):
        self.resource = None
        BotoServerError.__init__(self, status, reason, body)

    def startElement(self, name, attrs, connection):
        return BotoServerError.startElement(self, name, attrs, connection)

    def endElement(self, name, value, connection):
        if name == 'Resource':
            self.resource = value
        else:
            return BotoServerError.endElement(self, name, value, connection)

    def _cleanupParsedProperties(self):
        BotoServerError._cleanupParsedProperties(self)
        for p in ('resource'):
            setattr(self, p, None)

class S3ResponseError(StorageResponseError):
    """
    Error in response from S3.
    """
    pass

class GSResponseError(StorageResponseError):
    """
    Error in response from GS.
    """
    pass

class EC2ResponseError(BotoServerError):
    """
    Error in response from EC2.
    """

    def __init__(self, status, reason, body=None):
        self.errors = None
        self._errorResultSet = []
        BotoServerError.__init__(self, status, reason, body)
        self.errors = [ (e.error_code, e.error_message) \
                for e in self._errorResultSet ]
        if len(self.errors):
            self.error_code, self.error_message = self.errors[0]

    def startElement(self, name, attrs, connection):
        if name == 'Errors':
            self._errorResultSet = ResultSet([('Error', _EC2Error)])
            return self._errorResultSet
        else:
            return None

    def endElement(self, name, value, connection):
        if name == 'RequestID':
            self.request_id = value
        else:
            return None # don't call subclass here

    def _cleanupParsedProperties(self):
        BotoServerError._cleanupParsedProperties(self)
        self._errorResultSet = []
        for p in ('errors'):
            setattr(self, p, None)

class JSONResponseError(BotoServerError):
    """
    This exception expects the fully parsed and decoded JSON response
    body to be passed as the body parameter.

    :ivar status: The HTTP status code.
    :ivar reason: The HTTP reason message.
    :ivar body: The Python dict that represents the decoded JSON
        response body.
    :ivar error_message: The full description of the AWS error encountered.
    :ivar error_code: A short string that identifies the AWS error
        (e.g. ConditionalCheckFailedException)
    """
    def __init__(self, status, reason, body=None, *args):
        self.status = status
        self.reason = reason
        self.body = body
        if self.body:
            self.error_message = self.body.get('message', None)
            self.error_code = self.body.get('__type', None)
            if self.error_code:
                self.error_code = self.error_code.split('#')[-1]


class DynamoDBResponseError(JSONResponseError):
    pass


class SWFResponseError(JSONResponseError):
    pass


class EmrResponseError(BotoServerError):
    """
    Error in response from EMR
    """
    pass

class _EC2Error:

    def __init__(self, connection=None):
        self.connection = connection
        self.error_code = None
        self.error_message = None

    def startElement(self, name, attrs, connection):
        return None

    def endElement(self, name, value, connection):
        if name == 'Code':
            self.error_code = value
        elif name == 'Message':
            self.error_message = value
        else:
            return None

class SDBResponseError(BotoServerError):
    """
    Error in responses from SDB.
    """
    pass

class AWSConnectionError(BotoClientError):
    """
    General error connecting to Amazon Web Services.
    """
    pass

class StorageDataError(BotoClientError):
    """
    Error receiving data from a storage service.
    """
    pass

class S3DataError(StorageDataError):
    """
    Error receiving data from S3.
    """
    pass

class GSDataError(StorageDataError):
    """
    Error receiving data from GS.
    """
    pass

class InvalidUriError(Exception):
    """Exception raised when URI is invalid."""

    def __init__(self, message):
        Exception.__init__(self, message)
        self.message = message

class InvalidAclError(Exception):
    """Exception raised when ACL XML is invalid."""

    def __init__(self, message):
        Exception.__init__(self, message)
        self.message = message

class InvalidCorsError(Exception):
    """Exception raised when CORS XML is invalid."""

    def __init__(self, message):
        Exception.__init__(self, message)
        self.message = message

class NoAuthHandlerFound(Exception):
    """Is raised when no auth handlers were found ready to authenticate."""
    pass

# Enum class for resumable upload failure disposition.
class ResumableTransferDisposition(object):
    # START_OVER means an attempt to resume an existing transfer failed,
    # and a new resumable upload should be attempted (without delay).
    START_OVER = 'START_OVER'

    # WAIT_BEFORE_RETRY means the resumable transfer failed but that it can
    # be retried after a time delay within the current process.
    WAIT_BEFORE_RETRY = 'WAIT_BEFORE_RETRY'

    # ABORT_CUR_PROCESS means the resumable transfer failed and that
    # delaying/retrying within the current process will not help. If
    # resumable transfer included a state tracker file the upload can be
    # retried again later, in another process (e.g., a later run of gsutil).
    ABORT_CUR_PROCESS = 'ABORT_CUR_PROCESS'

    # ABORT means the resumable transfer failed in a way that it does not
    # make sense to continue in the current process, and further that the
    # current tracker ID should not be preserved (in a tracker file if one
    # was specified at resumable upload start time). If the user tries again
    # later (e.g., a separate run of gsutil) it will get a new resumable
    # upload ID.
    ABORT = 'ABORT'

class ResumableUploadException(Exception):
    """
    Exception raised for various resumable upload problems.

    self.disposition is of type ResumableTransferDisposition.
    """

    def __init__(self, message, disposition):
        Exception.__init__(self, message, disposition)
        self.message = message
        self.disposition = disposition

    def __repr__(self):
        return 'ResumableUploadException("%s", %s)' % (
            self.message, self.disposition)

class ResumableDownloadException(Exception):
    """
    Exception raised for various resumable download problems.

    self.disposition is of type ResumableTransferDisposition.
    """

    def __init__(self, message, disposition):
        Exception.__init__(self, message, disposition)
        self.message = message
        self.disposition = disposition

    def __repr__(self):
        return 'ResumableDownloadException("%s", %s)' % (
            self.message, self.disposition)

class TooManyRecordsException(Exception):
    """
    Exception raised when a search of Route53 records returns more
    records than requested.
    """

    def __init__(self, message):
        Exception.__init__(self, message)
        self.message = message