memcache_viewer.py 文件源码

def post(self):
    """Handle modifying actions and/or redirect to GET page."""
    next_param = {}

    if self.request.get('action:flush'):
      if memcache.flush_all():
        next_param['message'] = 'Cache flushed, all keys dropped.'
      else:
        next_param['message'] = 'Flushing the cache failed.  Please try again.'

    elif self.request.get('action:display'):
      next_param['key'] = self.request.get('key')

    elif self.request.get('action:edit'):
      next_param['edit'] = self.request.get('key')

    elif self.request.get('action:delete'):
      key = self.request.get('key')
      result = memcache.delete(key)
      if result == memcache.DELETE_NETWORK_FAILURE:
        next_param['message'] = ('ERROR: Network failure, key "%s" not deleted.'
                                 % key)
      elif result == memcache.DELETE_ITEM_MISSING:
        next_param['message'] = 'Key "%s" not in cache.' % key
      elif result == memcache.DELETE_SUCCESSFUL:
        next_param['message'] = 'Key "%s" deleted.' % key
      else:
        next_param['message'] = ('Unknown return value.  Key "%s" might still '
                                 'exist.' % key)

    elif self.request.get('action:save'):
      key = self.request.get('key')
      value = self.request.get('value')
      type_ = self.request.get('type')
      next_param['key'] = key

      converter = self.FRIENDLY_TYPE_NAME_TO_CONVERTER[type_]
      try:
        memcache_value = converter.to_cache(value)
      except ValueError as e:
        next_param['message'] = 'ERROR: Failed to save key "%s": %s.' % (key, e)
      else:
        if self._set_memcache_value(key,
                                    memcache_value,
                                    converter.memcache_type):
          next_param['message'] = 'Key "%s" saved.' % key
        else:
          next_param['message'] = 'ERROR: Failed to save key "%s".' % key
    elif self.request.get('action:cancel'):
      next_param['key'] = self.request.get('key')
    else:
      next_param['message'] = 'Unknown action.'

    next = self.request.path_url
    if next_param:
      next = '%s?%s' % (next, self._urlencode(next_param))
    self.redirect(next)