Validate JSON from a URL against a Json Schema from another URL.

validate_jsonschema.py

# Make sure to install 'jsonschema' as well as any validator packages,
# such as 'rfc3339-validator', that are used by the schema.

import json
import sys
import urllib.request
import urllib.error
import jsonschema

def main():
    if len(sys.argv) < 3:
        print('Usage: validate_json.py <json_file_url> <json_schema_url>', file=sys.stderr)
        sys.exit(1)

    with urllib.request.urlopen(sys.argv[1]) as json_file:
        json_data = json_file.read().decode()

    with urllib.request.urlopen(sys.argv[2]) as json_schema_file:
        json_schema = json_schema_file.read().decode()

    jsonschema.validate(json.loads(json_data), json.loads(json_schema), format_checker=jsonschema.FormatChecker())

    print("Validation successful!")

if __name__ == '__main__':
    main()