#############################################################################
# Copyright Kitware Inc.
#
# Licensed under the Apache License, Version 2.0 ( the "License" );
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#############################################################################
import re
import packaging.version
from girder_large_image.girder_tilesource import GirderTileSource
from osgeo import gdal
from girder import logger
from girder.models.file import File
from . import GDALFileTileSource
[docs]
class GDALGirderTileSource(GDALFileTileSource, GirderTileSource):
"""
Provides tile access to Girder items for gdal layers.
"""
name = 'gdal'
cacheName = 'tilesource'
[docs]
@staticmethod
def getLRUHash(*args, **kwargs):
return GirderTileSource.getLRUHash(*args, **kwargs) + ',%s,%s' % (
kwargs.get('projection', args[1] if len(args) >= 2 else None),
kwargs.get('unitsPerPixel', args[3] if len(args) >= 4 else None))
def _getLargeImagePath(self):
"""
GDAL can read directly from http/https/ftp via /vsicurl. If this
is a link file, try to use it.
"""
try:
largeImageFileId = self.item['largeImage']['fileId']
largeImageFile = File().load(largeImageFileId, force=True)
if (packaging.version.parse(gdal.__version__) >= packaging.version.parse('2.1.3') and
largeImageFile.get('linkUrl') and
not largeImageFile.get('assetstoreId') and
re.match(r'(http(|s)|ftp)://', largeImageFile['linkUrl'])):
largeImagePath = '/vsicurl/' + largeImageFile['linkUrl']
logger.info('Using %s' % largeImagePath)
return largeImagePath
except Exception:
pass
return GirderTileSource._getLargeImagePath(self)