Python3: use httplib with proxy authentication

python3-proxy-with-auth.py

import http.client, base64, sys, json

if len(sys.argv) < 2 :
    print("Usage: " + sys.argv[0] + " username password");
    quit()

proxy_details = {
    "url" : "xxx.xxx.xxx.xxx", # replace with correct URI
    "port" : 8080, # replace with correct port
    "username" : sys.argv[1], # From command line argument
    "password" : sys.argv[2]  # From command line argument
}

host_details = {
    "url" : "a.b.c.d", # replace with correct URL
    "port" : 443 #replace with correct port
}

# payload is optional. Use if the endpoint needs it
payload = json.dumps({
    "key-1": "val-1"
    })

headers = {} # add any headers the destination needs here

conn = http.client.HTTPSConnection(proxy_details['url'], proxy_details['port'])

auth = '%s:%s' % (proxy_details['username'], proxy_details['password'])
headers['Proxy-Authorization'] = 'Basic ' + str(base64.b64encode(auth.encode())).replace("b'", "").replace("'", "")

print(headers)

conn.set_tunnel(host_details['url'], host_details['port'], headers)
conn.request("POST", "/", payload, headers) # replace with correct HTTP parameters GET/POST/... and path

response = conn.getresponse()
print(response.status, response.reason)