Source code for large_image_source_gdal.girder_source

#############################################################################
#  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)