Python file demonstrating signature calculation for 500friends Security API

api_sample.py

#python3

from urllib.parse import urlencode,quote
from hashlib import md5
from collections import OrderedDict

ACCOUNT_ID = 'ACCOUNT_ID'
SECRET_KEY = 'SECRET KEY'

def array_to_sorted_string(self, inArray):
# must stringify keys in order to make sure they get sorted alphabetically, not numerically
	str_keys = {}
	for key in inArray.keys():
		str_keys[str(key)] = inArray[key]
	sorted_keys = list(str_keys.keys())
	sorted_keys.sort()

	arg_string = ''
	for key in sorted_keys:

	val = str_keys[key]

	if  isinstance(val, dict):
		arg_string += key + array_to_sorted_string(val)
	else:
		arg_string += key+ str(val)

	return arg_string


arg_dict = {}
arg_dict['uuid'] = ACCOUNT_ID
arg_dict['type'] = 'EVENT_TYPE'
arg_dict['value'] = 'TOTAL_PURCHASE_VALUE'
arg_dict['products'] = {
	'0': { 
		'product_id': 'SKU1',
		'price': 'PRICE1',
		'brands': 'BRANDS1'
	},
	'1': {
		'product_id': 'SKU2',
		'price': 'PRICE2',
		'brands': 'BRANDS2'
	}	
}
sig_string = SECRET_KEY + array_to_sorted_string(arg_dict)
arg_dict['sig'] = md5(sig_string.encode('utf-8')).hexdigest()

query_string = ''
for index, prod_dict in arg_dict['products'].items():
	for key, val in prod_dict.items():
		query_string += "products[" + index + "][" + key + "]=" + quote(val) + "&"
del arg_dict['products']
query_string += urlencode(arg_dict)

final_url = "https://loyalty.500friends.com/data/points/show?" + query_string
print(final_url)