POST request with a JSON file

Use this Python script to make a POST request to certain V‑Spark endpoints.

Figure 1. api_post.py

#!/usr/bin/env python
# Unsupported example code - Not for production use.

import sys
import json
import requests

# default values
PROTOCOL =  "http://"
PORT =  "3000"

if ( len(sys.argv) != 5 ):
    print "  Usage:", sys.argv[0], "HOST ROOT_TOKEN API_TO_CALL INPUT_JSON_FILE"
    sys.exit(-1)
else:
    HOST, ROOT_TOKEN, API_TO_CALL, INPUT_JSON_FILE = sys.argv[1:]

# Define the URL in a single variable for JSON load
url =  "%s%s:%s%s?token=%s" % (PROTOCOL, HOST, PORT, API_TO_CALL, ROOT_TOKEN)

print "POSTing data from " + INPUT_JSON_FILE + " to" + API_TO_CALL
with open(INPUT_JSON_FILE) as json_file:
    json_data = json.load(json_file)
headers = {'Content-type': 'application/json'}
response = requests.post(url, headers=headers, data=json.dumps(json_data))
if response.status_code != 200:
    print '  HTTP message: ', response.reason, ' HTTP return code: ', str(response.status_code)

Use the script with the following command and arguments:

python api_post.py $host $token $endpoint $json

$host: Hostname or URL for the system running V‑Spark.
$token: Authorization token with the required read or write permissions for the request.
$endpoint: Request endpoint, including any path parameters.
$json: Path to the request's JSON file.