Send raw POST request using Socket

Question

I am trying to send a raw POST request to a chromedriver server.

Here is what I try to initiate a new session:

import socket

s = socket.socket(
    socket.AF_INET, socket.SOCK_STREAM)

s.connect(("127.0.0.1", 9515))

s.send(b'POST /session HTTP/1.1
Content-Type:application/json
{"capabilities": {}, "desiredCapabilities": {}}

')
response = s.recv(4096)
print(response)

Output:

b'HTTP/1.1 200 OK
Content-Length:270
Content-Type:application/json; charset=utf-8
Connection:close

{"sessionId":"b26166c2aac022566917db20260500bb","status":33,"value":{"message":"session not created exception: Missing or invalid capabilities\n  (Driver info: chromedriver=2.31.488763 (092de99f48a300323ecf8c2a4e2e7cab51de5ba8),platform=Linux 4.4.0-91-generic x86_64)"}}'

Summary of error: json object I am sending is not getting parsed correctly

When I use the same json object but send it by requests library, everything is OK:

import requests

params = {
        'capabilities': {},
        'desiredCapabilities': {}
    }


headers = {'Content-type': 'application/json'}

URL = "http://127.0.0.1:9515"

r = requests.post(URL + "/session", json=params)

print("Status: " + str(r.status_code))
print("Body: " + str(r.content))

Output:

Status: 200
Body: b'{"sessionId":"e03189a25d099125a541f3044cb0ee42","status":0,"value":{"acceptSslCerts":true,"applicationCacheEnabled":false,"browserConnectionEnabled":false,"browserName":"chrome","chrome":{"chromedriverVersion":"2.31.488763 (092de99f48a300323ecf8c2a4e2e7cab51de5ba8)","userDataDir":"/tmp/.org.chromium.Chromium.LBeQkw"},"cssSelectorsEnabled":true,"databaseEnabled":false,"handlesAlerts":true,"hasTouchScreen":false,"javascriptEnabled":true,"locationContextEnabled":true,"mobileEmulationEnabled":false,"nativeEvents":true,"networkConnectionEnabled":false,"pageLoadStrategy":"normal","platform":"Linux","rotatable":false,"setWindowRect":true,"takesHeapSnapshot":true,"takesScreenshot":true,"unexpectedAlertBehaviour":"","version":"60.0.3112.90","webStorageEnabled":true}}'

Summary of output: json object is parsed successfully by the chromedriver and new session is created

Do you, guys, have an idea why sending the raw POST request using socket is not working as expected?

Send raw POST request using Socket

1 Answers