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# -*- coding: utf-8 -*-
#
# Copyright 2014 Google Inc. All Rights Reserved.
#
# 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.
"""Simple command-line sample for Google Maps Engine.
This sample code demonstrates use of the Google Maps Engine API. For more
information on the API, see developers.google.com/maps-engine/documentation/
These samples allow you to
1) List projects you have access to
2) List tables in a given project.
3) Upload a shapefile to create a Table asset.
Usage:
$ python maps_engine.py [-p project_id] [-s shapefile]
If you do not enter a shapefile, it will upload the included "polygons".
You can also get help on all the command-line flags the program understands
by running:
$ python maps_engine.py --help
To get detailed log output run:
$ python maps_engine.py -p 123456 --logging_level=DEBUG
"""
__author__ = "jlivni@google.com (Josh Livni)"
import argparse
import json
import logging
import sys
import time
from googleapiclient import sample_tools
from googleapiclient.http import MediaFileUpload
logging.basicConfig(level=logging.INFO)
# Declare command-line flags.
argparser = argparse.ArgumentParser(add_help=False)
argparser.add_argument("-p", "--project_id", help="optional GME Project ID")
argparser.add_argument("-s", "--shapefile", help="Shapefile (without the .shp)")
SUCCESSFUL_STATUS = ["processed", "complete", "ready"]
class MapsEngineSampleException(Exception):
"""Catch this for failures specific to this sample code."""
def ListProjects(service):
"""List the projects available to the authorized account.
Args:
service: The service object built by the Google API Python client library.
"""
projects = service.projects().list().execute()
logging.info(json.dumps(projects, indent=2))
def ListTables(service, project_id):
"""List the tables in a given project.
Args:
service: The service object built by the Google API Python client library.
project_id: string, id of the GME project.
"""
tables = service.tables().list(projectId=project_id).execute()
logging.info(json.dumps(tables, indent=2))
def UploadShapefile(service, project_id, shapefile_prefix):
"""Upload a shapefile to a given project, and display status when complete.
Args:
service: The service object built by the Google API Python client library.
project_id: string, id of the GME project.
shapefile_prefix: string, the shapefile without the .shp suffix.
Returns:
String id of the table asset.
"""
# A shapefile is actually a bunch of files; GME requires these four suffixes.
suffixes = ["shp", "dbf", "prj", "shx"]
files = []
for suffix in suffixes:
files.append({
"filename": "%s.%s" % (shapefile_prefix, suffix)
})
metadata = {
"projectId": project_id,
"name": shapefile_prefix,
"description": "polygons that were uploaded by a script",
"files": files,
# You need the string value of a valid shared and published ACL
# Check the "Access Lists" section of the Maps Engine UI for a list.
"draftAccessList": "Map Editors",
"tags": [shapefile_prefix, "auto_upload", "kittens"]
}
logging.info("Uploading metadata for %s", shapefile_prefix)
response = service.tables().upload(body=metadata).execute()
# We have now created an empty asset.
table_id = response["id"]
# And now upload each of the files individually, passing in the table id.
for suffix in suffixes:
shapefile = "%s.%s" % (shapefile_prefix, suffix)
media_body = MediaFileUpload(shapefile, mimetype="application/octet-stream")
logging.info("uploading %s", shapefile)
response = service.tables().files().insert(
id=table_id,
filename=shapefile,
media_body=media_body).execute()
# With all files uploaded, check status of the asset to ensure it's processed.
CheckAssetStatus(service, "tables", table_id)
return table_id
def CheckAssetStatus(service, asset_type, asset_id):
endpoint = getattr(service, asset_type)
response = endpoint().get(id=asset_id).execute()
status = response["processingStatus"]
logging.info("Asset Status: %s", status)
if status in SUCCESSFUL_STATUS:
logging.info("asset successfully processed; the id is %s", asset_id)
else:
logging.info("Asset %s; will check again in 5 seconds", status)
time.sleep(5)
CheckAssetStatus(service, asset_type, asset_id)
def main(argv):
# Authenticate and construct service.
service, flags = sample_tools.init(
argv, "mapsengine", "v1", __doc__, __file__, parents=[argparser],
scope="https://www.googleapis.com/auth/mapsengine")
if flags.project_id:
# ListTables(service, flags.project_id)
# The example polygons shapefile should be in this directory.
filename = flags.shapefile or "polygons"
table_id = UploadShapefile(service, flags.project_id, filename)
logging.info("Sucessfully created table: %s", table_id)
else:
ListProjects(service)
return
if __name__ == "__main__":
main(sys.argv)