python - Create new webdriver session manually -


i trying play little bit webdriver protocol using python , requests module.

i started chromedriver binary:

$ chromedriver_2.31  starting chromedriver 2.31.488763 (092de99f48a300323ecf8c2a4e2e7cab51de5ba8) on port 9515 local connections allowed.

so far good.

but problem session not created exception when trying create session:

import requests  r = requests.post("http://127.0.0.1:9515/session", {})  print("status: " + str(r.status_code)) print("body: " + str(r.content))

execution output:

status: 200 body: b'{"sessionid":"286421fcd381ee0471418ebce7f3e125","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)"}}'

i searched through webdriver protocol docs, couldn't find information capabilities mandatory or that.

so, tried random capabilities:

import requests  data = {         "browsername": "chrome",         "version": "",         "platform": "linux",         "javascriptenabled": "true",         "acceptinsecurecerts": "false",         "cssselectorsenabled": "true"         }  r = requests.post("http://127.0.0.1:9515/session", data)  print("status: " + str(r.status_code)) print("body: " + str(r.content))

but again fail:

status: 400 body: b'missing command parameters'

do have ideas problem , how fix it?

update

also tried:

import requests   data = """         {             desiredcapabilities: {               "browsername": "chrome",             "version": "",             "platform": "any"             }         }     """  headers = {'content-type': 'application/json'}  r = requests.post("http://127.0.0.1:9515/session", json=data, headers=headers)  print("status: " + str(r.status_code)) print("body: " + str(r.content))

again error:

status: 400 body: b'missing command parameters'

okay, looked @ how selenium it..:

selenium/webdriver/remote/remote_connection.py, class remoteconnection, method execute. raised exception params, this:

raise exception(params)

here's came out:

{'capabilities': {'alwaysmatch': {'browsername': 'chrome',    'chromeoptions': {'args': [], 'extensions': []},    'platform': 'any',    'version': ''},   'firstmatch': []},  'desiredcapabilities': {'browsername': 'chrome',   'chromeoptions': {'args': [], 'extensions': []},   'platform': 'any',   'version': ''}}

so, doing same thing, data our new found dictionary:

r = requests.post('http://127.0.0.1:9515/session', json=data) # new chromium window created r.content `b'{"sessionid":"94cf6af9577d323eb51f6340b1fd2d07","status":0,"value":{"acceptsslcerts":true,"applicationcacheenabled":false,"browserconnectionenabled":false,"browsername":"chrome","chrome":{"chromedriverversion":"2.30.477729 (e5aa99d9d101379b1542958a71df3f50913f1ea2)","userdatadir":"/tmp/.org.chromium.chromium.uqwviv"},"cssselectorsenabled":true,"databaseenabled":false,"handlesalerts":true,"hastouchscreen":false,"javascriptenabled":true,"locationcontextenabled":true,"mobileemulationenabled":false,"nativeevents":true,"networkconnectionenabled":false,"pageloadstrategy":"normal","platform":"linux","rotatable":false,"takesheapsnapshot":true,"takesscreenshot":true,"unexpectedalertbehaviour":"","version":"60.0.3112.78","webstorageenabled":true}}'`

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