Develop Reference

Kraken Futures API - authenticationError Python

I'm finding the Kraken Futures API confusing compared to other providers. Using a demo account I'm trying to make basic private requests and not working so far with authentication error. The code mainly comes from Kraken docs (non-futures)
Futures auth doc: https://support.kraken.com/hc/en-us/articles/360022635592-Generate-authentication-strings-REST-API-
api_sec = "MxA2FwIQxCxsfy2XDa4R8PwTjwLKjzT8GSOw+qOVuWGh3Lx6PtyW0f94J5XXKz9mP8bztRJSDQJVKBsHFicrDr/N"
api_url = "https://futures.kraken.com/derivatives/api/v3"
api_key = 'Y7kVv/hW0JWRRAhJtA8BuJkUX+E0gWmTL5NWf4lRPN8f+iYoJp9AoYwW'
def get_kraken_signature(urlpath, data, secret):
postdata = urllib.parse.urlencode(data)
encoded = (str(data['nonce']) + postdata).encode()
message = urlpath.encode() + hashlib.sha256(encoded).digest()
mac = hmac.new(base64.b64decode(secret), message, hashlib.sha256)
sigdigest = base64.b64encode(mac.digest())
return sigdigest.decode()
# Attaches auth headers and returns results of a get request
def kraken_request(uri_path, data, api_key, api_sec):
headers = {}
headers['API-Key'] = api_key
# get_kraken_signature() as defined in the 'Authentication' section
headers['API-Sign'] = get_kraken_signature(uri_path, data, api_sec)
req = requests.get((api_url + uri_path), headers=headers, data=data)
return req
# Construct the request and print the result
resp = kraken_request('/accounts', {
"nonce": str(int(1000*time.time()))
}, api_key, api_sec)
Output
{"result":"error","error":"authenticationError","serverTime":"2022-05-13T10:14:50.838Z"}

Replacing requests with urllib

I'm currently using the following function to create a bearer token for further API Calls:
import ujson
import requests
def getToken():
#create token for Authorization'
url = 'https://api.XXX.com/login/admin'
payload = "{\n\t\"email\":\"test#user.com\",\n\t\"password\":\"password\"\n}"
headers1 = {
'Content-Type': 'application/json'
}
response = requests.request('POST', url, headers = headers1, data = payload)
#create string to pass on to api request
jsonToken = ujson.loads(response.text)
token = jsonToken['token']
return token
How can I do the same by using urllib.request?

Is this what you're looking for?
from urllib.request import Request, urlopen
import ujson
def getToken():
url = 'https://api.xxx.com/login/admin'
payload = """{"email":"test#user.com","password":"password"}"""
headers = {
'Content-Type': 'application/json'
}
request = Request(method='POST',
data=payload.encode('utf-8'),
headers=headers,
url=url)
with urlopen(request) as req:
response = req.read().decode('utf-8')
jsonToken = ujson.loads(response)
token = jsonToken['token']
return token

Why is no ouput generated from this function?

I have this python function and i wish to execute this using lambda handler function hence I have written this code. When I execute in Pycharm I don't see any output in console. Can someone guide what is the problem with below code?
import json
from json import loads
import requests
from requests import exceptions
from requests.auth import HTTPBasicAuth
def lambda_handler(event, context):
test_post_headers_body_json()
return {"statusCode": 200, "body": json.dumps("Hello from Lambda!")}
def test_post_headers_body_json():
client_id = "WJRYDHNGROIZHL8B"
client_secret = "V5VXK6FLG1YI0GD2XY3H"
user = "automation-store-admin1#abc.com"
password = "c0Ba5PBdvVl2"
access_point = "https://api.platform.abc.com/auth/oauth/token"
grant_type = "password"
headers = {"Content-Type": "application/x-www-form-urlencoded"}
# auth = auth.HTTPBasicAuth(client_id, client_secret)
data = {"grant_type": grant_type, "username": user, "password": password}
resp = None
try:
resp = requests.post(
access_point,
auth=HTTPBasicAuth(client_id, client_secret),
data=data,
headers=headers,
)
except exceptions.ConnectionError:
exit(1)
if resp.status_code == 200:
resp = loads(resp.text)
if "access_token" in resp:
print(resp["access_token"])
exit(0)
exit(1)

It is normal because when running you code, Python only declare the function not using it. You should add a __main__ entry point at the end of your file:
import json
from json import loads
import requests
from requests import exceptions
from requests.auth import HTTPBasicAuth
def lambda_handler(event, context):
test_post_headers_body_json()
return {"statusCode": 200, "body": json.dumps("Hello from Lambda!")}
def test_post_headers_body_json():
client_id = "WJRYDHNGROIZHL8B"
client_secret = "V5VXK6FLG1YI0GD2XY3H"
user = "automation-store-admin1#abc.com"
password = "c0Ba5PBdvVl2"
access_point = "https://api.platform.abc.com/auth/oauth/token"
grant_type = "password"
headers = {"Content-Type": "application/x-www-form-urlencoded"}
# auth = auth.HTTPBasicAuth(client_id, client_secret)
data = {"grant_type": grant_type, "username": user, "password": password}
resp = None
try:
resp = requests.post(
access_point,
auth=HTTPBasicAuth(client_id, client_secret),
data=data,
headers=headers,
)
except exceptions.ConnectionError:
exit(1)
if resp.status_code == 200:
resp = loads(resp.text)
if "access_token" in resp:
print(resp["access_token"])
exit(0)
exit(1)
# added part
if __name__ == '__main__':
test_post_headers_body_json()

Python Webhook: Passing through a URL + payload

I'm a beginner with Python and trying to build a service that takes information from api.ai, passes it to an API, then returns a confirmation message from the JSON it returns.
app.py:
#!/usr/bin/env python
from __future__ import print_function
from future.standard_library import install_aliases
install_aliases()
from urllib.parse import urlparse, urlencode
from urllib.request import urlopen, Request
from urllib.error import HTTPError
import json
import os
import sys
import logging
from flask import Flask, render_template
from flask import request
from flask import make_response
# Flask app should start in global layout
app = Flask(__name__)
app.logger.addHandler(logging.StreamHandler(sys.stdout))
app.logger.setLevel(logging.ERROR)
#app.route('/webhook', methods=['POST'])
def webhook():
req = request.get_json(silent=True, force=True)
print("Request:")
print(json.dumps(req, indent=4))
res = processRequest(req)
res = json.dumps(res, indent=4)
# print(res)
r = make_response(res)
r.headers['Content-Type'] = 'application/json'
return r
def processRequest(req):
if req.get("result").get("action") != "bookMyConference":
return {}
#oauth
orequest = req.get("originalRequest") # work down the tree
odata = orequest.get("data") # work down the tree
user = odata.get("user") # work down the tree
access_token = user.get("access_token")
#data
result = req.get("result") # work down the tree
parameters = result.get("parameters") # work down the tree
startdate = parameters.get("start-date")
meetingname = parameters.get("meeting-name")
payload = {
"start-date": startdate,
"end-date": startdate,
"meeting-name": meetingname
}
# POST info to join.me
baseurl = "https://api.join.me/v1/meetings"
p = Request(baseurl)
p.add_header('Content-Type', 'application/json; charset=utf-8')
p.add_header('Authorization', 'Bearer ' + access_token) #from oauth
jsondata = json.dumps(payload)
jsondataasbytes = jsondata.encode('utf-8') # needs to be bytes
jresult = urlopen(p, jsondataasbytes).read()
data = json.loads(jresult)
res = makeWebhookResult(data)
return res
def makeWebhookResult(data):
speech = "Appointment scheduled!"
print("Response:")
print(speech)
return {
"speech": speech,
"displayText": speech,
# "data": data,
"source": "heroku-bookmyconference"
}
if __name__ == '__main__':
port = int(os.getenv('PORT', 5000))
print("Starting app on port %d" % port)
app.run(debug=False, port=port, host='0.0.0.0')
Edit 4: Here's the error I'm getting in my Heroku logs:
2017-03-21T19:06:09.383612+00:00 app[web.1]: HTTPError: HTTP Error
400: Bad Request

Borrowing from here, using urlib modules inside processRequest() you could add your payload to urlopen like this:
req = Request(yql_url)
req.add_header('Content-Type', 'application/json; charset=utf-8')
jsondata = json.dumps(payload)
jsondataasbytes = jsondata.encode('utf-8') # needs to be bytes
result = urlopen(req, jsondataasbytes).read()
data = json.loads(result)
Things get more succinct if using the requests module:
headers = {'content-type': 'application/json'}
result = requests.post(yql_url, data=json.dumps(payload), headers=headers)
data = result.json()
EDIT: Adding some details specific to the join.me api
Looking at the join.me docs you'll need to obtain an access token to add to your header. But you also need an app auth code before you can get an access token. You can get the app auth code manually, or by chaining some redirects.
To get started, try this url in your browser and get the code from the callback params. Using your join.me creds:
auth_url = 'https://secure.join.me/api/public/v1/auth/oauth2' \
+ '?client_id=' + client_id \
+ '&scope=scheduler%20start_meeting' \
+ '&redirect_uri=' + callback_url \
+ '&state=ABCD' \
+ '&response_type=code'
print(auth_url) # try in browser
To get an access token:
token_url = 'https://secure.join.me/api/public/v1/auth/token'
headers = {'content-type': 'application/json'}
token_params = {
'client_id': client_id,
'client_secret': client_secret,
'code': auth_code,
'redirect_uri': callback_url,
'grant_type': 'authorization_code'
}
result = requests.post(token_url, data=json.dumps(token_params), headers=headers)
access_token = result.json().get('access_token')
Then your header for the post to /meetings would need to look like:
headers = {
'content-type': 'application/json',
'Authorization': 'Bearer ' + access_token
}

Creating a python wrapper for an API using classes

I am trying to make a Python Wrapper for an API. I have been able to create scripts that work fine but don't use classes. I want to make a real wrapper of that API using classes. I am new to OOP in Python.
Following was my attempt but I am stuck at how to convert it to an OO type.
import urllib2
from urllib import urlencode
import json
class apiclient:
def __init__(self,
request_url,
hmh_api_key,
client_id,
grant_type="password",
username="username",
password="password"):
values = {
"client_id": client_id,
"grant_type": grant_type,
"username": username,
"password": password
}
data = urlencode(values)
req = urllib2.Request(request_url, data)
req.add_header("Api-Key", api_key)
response = urllib2.urlopen(req)
response_header = response.info().dict
response_body = response.read()
json_acceptable_string = response_body.replace("'", "\"")
response_body_dict = json.loads(json_acceptable_string)
return response_body_dict ## this is the response
if __name__ == "__main__":
API_KEY = "75b5cc58a5cdc0a583f91301cefedf0c"
CLIENT_ID = "ef5f7a03-58e8-48d7-a38a-abbd2696bdb6.hmhco.com"
REQUEST_URL = "http://some.url"
client = apiclient(request_url=REQUEST_URL,
api_key=API_KEY,
client_id=CLIENT_ID)
print client
Without classes, I get the response JSON as response_body_dict but with classes I get TypeError: __init__() should return None. How should I start designing my program.
I have shown only a part of the whole program, there are a lot many similar scripts that send requests to URLs and get JSON responses.
Thanks!

You should not return something from __init__ function.
EDIT:
If you need that value you should use the response_body_dict as a class member and get him from other method:
import urllib2
from urllib import urlencode
import json
class apiclient:
def __init__(self,
request_url,
api_key,
client_id,
grant_type="password",
username="username",
password="password"):
values = {
"client_id": client_id,
"grant_type": grant_type,
"username": username,
"password": password
}
data = urlencode(values)
req = urllib2.Request(request_url, data)
req.add_header("Api-Key", api_key)
response = urllib2.urlopen(req)
response_header = response.info().dict
response_body = response.read()
json_acceptable_string = response_body.replace("'", "\"")
self.response_body_dict = json.loads(json_acceptable_string)
def get_response_body(self):
return self.response_body_dict
if __name__ == "__main__":
API_KEY = "75b5cc58a5cdc0a583f91301cefedf0c"
CLIENT_ID = "ef5f7a03-58e8-48d7-a38a-abbd2696bdb6.hmhco.com"
REQUEST_URL = "http://some.url"
client = apiclient(request_url=REQUEST_URL,
api_key=API_KEY,
client_id=CLIENT_ID)
response = client.get_response_body()
print client