Source code for weaver.processes.builtin.jsonarray2netcdf

#!/usr/bin/env python
__doc__ = """
Extracts and fetches NetCDF files from a JSON file containing an URL string array,
and provides them on the output directory.
import argparse
import json
import logging
import os
import sys
from tempfile import TemporaryDirectory

[docs] CUR_DIR = os.path.abspath(os.path.dirname(__file__))
sys.path.insert(0, CUR_DIR) # root to allow 'from weaver import <...>' sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.dirname(CUR_DIR)))) # place weaver specific imports after sys path fixing to ensure they are found from external call # pylint: disable=C0413,wrong-import-order from weaver.formats import repr_json # isort:skip # noqa: E402 from weaver.processes.builtin.utils import ( # isort:skip # noqa: E402 get_package_details, is_netcdf_url, validate_reference ) from weaver.utils import fetch_file, get_secure_path # isort:skip # noqa: E402 PACKAGE_NAME, PACKAGE_BASE, PACKAGE_MODULE = get_package_details(__file__) # setup logger since it is not run from the main 'weaver' app
[docs] LOGGER = logging.getLogger(PACKAGE_MODULE)
[docs] _handler = logging.StreamHandler(sys.stdout) # noqa
_handler.setFormatter(logging.Formatter(fmt="[%(name)s] %(levelname)-8s %(message)s")) LOGGER.addHandler(_handler) LOGGER.setLevel(logging.INFO) # process details __version__ = "2.3" __title__ = "JSON array to NetCDF" __abstract__ = __doc__ # NOTE: '__doc__' is fetched directly, this is mostly to be informative
[docs] def j2n(json_reference, output_dir): # type: (str, str) -> None"Process '%s' execution starting...", PACKAGE_NAME)"Process '%s' output directory: [%s].", PACKAGE_NAME, output_dir) try: if not os.path.isdir(output_dir): raise ValueError(f"Output directory [{output_dir}] does not exist.") with TemporaryDirectory(prefix=f"wps_process_{PACKAGE_NAME}_") as tmp_dir:"Verify URL reference: [%s]", json_reference) validate_reference(json_reference, is_file=True)"Fetching JSON file: [%s]", json_reference) json_path = fetch_file(json_reference, tmp_dir, timeout=10, retry=3) json_path = get_secure_path(json_path)"Reading JSON file: [%s]", json_path) try: with open(json_path, mode="r", encoding="utf-8") as json_file: json_content = json.load(json_file) except json.JSONDecodeError: LOGGER.error("Invalid JSON could not be parsed.") raise ValueError("Invalid JSON file format, expected a plain array of NetCDF file URL strings.") if not isinstance(json_content, list) or any(not isinstance(item, str) for item in json_content): LOGGER.error("Invalid JSON: %s", json_content) raise ValueError("Invalid JSON file format, expected a plain array of NetCDF file URL strings.")"Parsing JSON file references from file contents:\n%s", repr_json(json_content)) for file_url in json_content:"Validate NetCDF reference from JSON file: [%s]", file_url) validate_reference(file_url, is_file=True) if not is_netcdf_url(file_url): raise ValueError(f"Invalid file format for [{file_url}], expected a NetCDF file URL.")"Fetching NetCDF reference from JSON file: [%s]", file_url) fetched_nc = fetch_file(file_url, output_dir, timeout=10, retry=3)"Fetched NetCDF output location: [%s]", fetched_nc) except Exception as exc: # pragma: no cover LOGGER.error("Process '%s' raised an exception: [%s]", PACKAGE_NAME, exc) raise"Process '%s' execution completed.", PACKAGE_NAME)
[docs] def main(*args): # type: (*str) -> None"Parsing inputs of '%s' process.", PACKAGE_NAME) parser = argparse.ArgumentParser(description=__doc__) parser.add_argument("-i", metavar="json", type=str, required=True, help="JSON file to be parsed for NetCDF file names.") parser.add_argument("-o", metavar="outdir", default=CUR_DIR, help="Output directory of the retrieved NetCDF files extracted by name from the JSON file.") ns = parser.parse_args(args) sys.exit(j2n(ns.i, ns.o))
if __name__ == "__main__": main(*sys.argv[1:])