replicate curl command python 3 urllib request API - python-3.x

Question

This problem is kind of driving me crazy.
I'm doing a very simple python 3 script to manage an API in a public website.
I am able to do it with curl, but not in pyhton.
Can't use either requests library or curl in my real environment, just for tests
This is working:
curl -d "credential_0=XXXX&credential_1=XXXXXX" -c cookiefile.txt https://XXXXXXXXXXXXXXX/LOGIN
curl -d 'json={"devices" : ["00:1A:1E:29:73:B2","00:1A:1E:29:73:B2"]}' -b cookiefile.txt -v https://XXXXXXXXX/api-path --trace-ascii /dev/stdout
and we can see this in the curl debug:
Send header, 298 bytes (0x12a)
0000: POST /api-path HTTP/1.1
0034: Host: XXXXXXXXXXXXXXXX
0056: User-Agent: curl/7.47.0
006f: Accept: /
007c: Cookie: csrf_token=751b6bd9-0290-496b-820e-XXXXXXXX; session
00bc: =XXXXXX-6d29-4cf9-8907-XXXXXXXXXXXX
00e3: Content-Length: 60
00f7: Content-Type: application/x-www-form-urlencoded
0128:
=> Send data, 60 bytes (0x3c)
0000: json={"devices" : ["00:1A:1E:29:73:B2","00:1A:1E:29:73:B2"]}
== Info: upload completely sent off: 60 out of 60 bytes
This is the python code to replicate the second request, which is the problematic one
string_query={"devices" : [ "34:FC:B9:CE:14:7E","00:1A:1E:29:73:B2" ]}
jsonbody_url=urllib.parse.urlencode(string_query)
jsonbody_url=jsonbody_url.encode("utf-8")
req=urllib.request.Request(url,data=jsonbody_url,headers={"Cookie" :
cookie,"Content-Type": "application/x-www-form-urlencoded","User-
Agent":"curl/7.47.0","charset":"UTF-8","Content-
length":len(jsonbody_url),
"Connection": "Keep-Alive"},method='POST')
And the server is completely ignoring the Json content.
Everything else is working, login and other url parameters from the same API
Any ideas?

Answer 1

Try this:
import requests
string_query={"devices" : [ "34:FC:B9:CE:14:7E","00:1A:1E:29:73:B2" ]}
headers={
"Cookie" : cookie,
"Content-Type": "application/x-www-form-urlencoded",
"User-Agent":"curl/7.47.0",
"charset":"UTF-8",
"Connection": "Keep-Alive"
}
response = requests.post(url,data=string_query,headers=headers)
print(response.content)