chrome/test/ispy/common/cloud_bucket.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 """Abstract injector class for GS requests."""
   6
   7
   8 class FileNotFoundError(Exception):
   9   """Thrown by a subclass of CloudBucket when a file is not found."""
  10   pass
  11
  12
  13 class BaseCloudBucket(object):
  14   """An abstract base class for working with GS."""
  15
  16   def UploadFile(self, path, contents, content_type):
  17     """Uploads a file to GS.
  18
  19     Args:
  20       path: where in GS to upload the file.
  21       contents: the contents of the file to be uploaded.
  22       content_type: the MIME Content-Type of the file.
  23     """
  24     raise NotImplementedError
  25
  26   def DownloadFile(self, path):
  27     """Downsloads a file from GS.
  28
  29     Args:
  30       path: the location in GS to download the file from.
  31
  32     Returns:
  33       String contents of the file downloaded.
  34
  35     Raises:
  36       bucket_injector.NotFoundException: if the file is not found.
  37     """
  38     raise NotImplementedError
  39
  40   def UpdateFile(self, path, contents):
  41     """Uploads a file to GS.
  42
  43     Args:
  44       path: location of the file in GS to update.
  45       contents: the contents of the file to be updated.
  46     """
  47     raise NotImplementedError
  48
  49   def RemoveFile(self, path):
  50     """Removes a file from GS.
  51
  52     Args:
  53       path: the location in GS to download the file from.
  54     """
  55     raise NotImplementedError
  56
  57   def FileExists(self, path):
  58     """Checks if a file exists in GS.
  59
  60     Args:
  61       path: the location in GS of the file.
  62
  63     Returns:
  64       boolean representing whether the file exists in GS.
  65     """
  66     raise NotImplementedError
  67
  68   def GetImageURL(self, path):
  69     """Gets a URL to an item in GS from its path.
  70
  71     Args:
  72       path: the location in GS of a file.
  73
  74     Returns:
  75       an url to a file in GS.
  76
  77     Raises:
  78       bucket_injector.NotFoundException: if the file is not found.
  79     """
  80     raise NotImplementedError
  81
  82   def GetAllPaths(self, prefix):
  83     """Gets paths to files in GS that start with a prefix.
  84
  85     Args:
  86       prefix: the prefix to filter files in GS.
  87
  88     Returns:
  89       a generator of paths to files in GS.
  90     """
  91     raise NotImplementedError