validate.py

from __future__ import print_function
import sys
import json

import jsonschema
import requests

_schema = None


def schema(uri='https://girder.neuro.emory.edu/api/v1/annotation/schema'):
    req = requests.get(uri)
    if not req.ok:
        raise Exception('Could not download schema')

    return req.json()


def validate(file):
    global _schema
    if _schema is None:
        _schema = schema()

    with open(file, 'r') as f:
        obj = json.load(f)
        jsonschema.validate(obj, _schema)


def main(argv):
    if len(sys.argv) < 2:
        print('usage: %s file1 [file2 [...]]' % sys.argv[0])
        sys.exit(255)

    haserr = 0
    for file in sys.argv[1:]:
        print('\n*** Validating "%s" ***\n' % file)
        try:
            validate(file)
        except jsonschema.ValidationError as err:
            haserr += 1
            print('Validation failed with:')
            print(err.message)
            continue
        else:
            print('Success!\n')

    return haserr

if __name__ == '__main__':
    sys.exit(main(sys.argv))