How to make a first data global E4 Gateway API python demo call with hmac 31.05.14

Setup your demo account to the set you data:
1.        Login as the merchant administrator account at:
https://demo.globalgatewaye4.firstdata.com 
2.        Click on Administration at the top right hand side of your page
3.        Click on Terminals at the top left hand side
4.        Click on your Business Name underneath the terminal column (usually the second
line down). This line also has the currency/virtual terminal/gateway columns filled
in. For demo, you would click on your ecommerce terminal.
5.        On the first page scroll down until you find the gateway id
6.        Continue scrolling to find the password box and generate a new password. Make
sure to update at the bottom
7.        After updating the password: go back into your terminal where we found the
previous information and click on API Access
8.        Your key id will be listed
9.        Generate a new HMAC Key and update at the bottom

test python script:

from hashlib import sha1
from time import gmtime, strftime
import base64
import hmac
import httplib
import json

gge4_date = strftime("%Y-%m-%dT%H:%M:%S", gmtime()) + 'Z'
uri = '/transaction/v12'
key_id = 'MY_API_KEY_ID'
key = 'MY_HMAC_KEY'
data = {"gateway_id" : 'MY_GATEWAY_ID',
        "password" : 'MY_PASSWORD',
        "transaction_type" : '00',
        "amount" : '666.66',
        "cardholder_name" : 'Test',
        "cc_number" : '4111111111111111',
        "cc_expiry" :'0516',
        "cvv2" :'123'
        };
transaction_body = json.dumps(data)

method = 'POST'
content_digest = sha1(transaction_body).hexdigest()

content_type = 'application/json'
host = 'api.demo.globalgatewaye4.firstdata.com'

headers = { 'Content-Type': content_type,
                'X-GGe4-Content-SHA1': content_digest,
                'X-GGe4-Date': gge4_date,
                'Authorization': 'GGE4_API ' + key_id + ':' + base64.b64encode(hmac.new(key, method + "\n" + content_type + "\n" + content_digest + "\n" + gge4_date + "\n" + uri.split('?')[0], sha1).digest()) }
conn = httplib.HTTPSConnection(host)
conn.request(method, uri, transaction_body, headers)

print conn.getresponse().read()

https://firstdata.zendesk.com/entries/22069302-api-security-hmac-hash

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How to make a first data global E4 Gateway API python demo call with hmac 31.05.14

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