Error starting PhantomJS with Selenium RemoteWebDriver

Question

I run the selenium-selenium hub with its default start command,

java -jar selenium-server-standalone-2.33.0.jar -role hub 

And I run PhantomJS in this webdriver mode, on the same computer, for example,

 phantomjs --webdriver=8080 --webdriver-selenium-grid-hub=http://127.0.0.1:4444 

When PhantomJS starts up, I get only "All" OK messages,

 [INFO - 2013-09-09T18:10:38.849Z] GhostDriver - Main - running on port 8080 [INFO - 2013-09-09T18:10:38.850Z] GhostDriver - Main - registering to Selenium HUB 'http://127.0.0.1:4444' using '127.0.0.1:8080' [INFO - 2013-09-09T18:11:47.164Z] HUB Register - register - Registered with grid hub: http://127.0.0.1:4444/ (ok) 

But if I try to use this browser,

 driver = webdriver.Remote(command_executor='http://127.0.0.1:4444/wd/hub', desired_capabilities=DesiredCapabilities.PHANTOMJS) 

Looking at the output from the PhantomJS executable,

 [INFO - 2013-09-09T18:17:12.531Z] Session [0c5c9500-197c-11e3-8eed-b3b7a73965aa] - _decorateNewWindow - page.settings: {"XSSAuditingEnabled":false,"javascriptCanCloseWindows":true,"javascriptCanOpenWindows":true,"javascriptEnabled":true,"loadImages":true,"localToRemoteUrlAccessEnabled":false,"userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X) AppleWebKit/534.34 (KHTML, like Gecko) PhantomJS/1.9.2 Safari/534.34","webSecurityEnabled":true} [INFO - 2013-09-09T18:17:12.531Z] Session [0c5c9500-197c-11e3-8eed-b3b7a73965aa] - page.customHeaders: - {} [INFO - 2013-09-09T18:17:12.531Z] Session [0c5c9500-197c-11e3-8eed-b3b7a73965aa] - CONSTRUCTOR - Desired Capabilities: {"platform":"ANY","javascriptEnabled":true,"browserName":"phantomjs","version":""} [INFO - 2013-09-09T18:17:12.531Z] Session [0c5c9500-197c-11e3-8eed-b3b7a73965aa] - CONSTRUCTOR - Negotiated Capabilities: {"browserName":"phantomjs","version":"1.9.2","driverName":"ghostdriver","driverVersion":"1.0.4","platform":"mac-10.7 (Lion)-32bit","javascriptEnabled":true,"takesScreenshot":true,"handlesAlerts":false,"databaseEnabled":false,"locationContextEnabled":false,"applicationCacheEnabled":false,"browserConnectionEnabled":false,"cssSelectorsEnabled":true,"webStorageEnabled":false,"rotatable":false,"acceptSslCerts":false,"nativeEvents":true,"proxy":{"proxyType":"direct"}} [INFO - 2013-09-09T18:17:12.531Z] SessionManagerReqHand - _postNewSessionCommand - New Session Created: 0c5c9500-197c-11e3-8eed-b3b7a73965aa 

Everything seems to be fine, but the code crashes: / I get a huge stacktrace error, mostly until

 selenium.common.exceptions.WebDriverException: Message: u'Error forwarding the new session new session request for webdriver should contain a location header with the session.' 

And if you check the output of the grid hub,

 INFO: Trying to create a new session on test slot {seleniumProtocol=WebDriver, browserName=phantomjs, maxInstances=1} INFO: Available nodes: [host :http://127.0.0.1:8080 time out : 300000] 

There also seems to be a problem. For some reason, the network hub does not get any information from the PhantomJS executable, although it seems that it handles things correctly.

For testing, I also have a regular selenium node, running on the same computer, with the command

 java -jar selenium-server-standalone-2.33.0.jar -role node 

and if I started a remote access session to a remote Firefox server (in Python),

 driver = webdriver.Remote(command_executor='http://127.0.0.1:4444/wd/hub', desired_capabilities=DesiredCapabilities.FIREFOX) 

everything is good.

Everything seems to be set up correctly, I keep things like 'vanilla' and as close to what the docs say as possible, but just can't get over this fence.

Exactly the same error occurs when you try Java.

 WebDriver driver = new RemoteWebDriver(DesiredCapabilities.phantomjs()); 

A screenshot of the console with the connection, PhantomJS is alive and well there,

The default left is the selenium node, the right is PhantomJS (and 10.0.0.222 is my laptop's IP address at work).

And my versions are 1.9.2 for PhantomJS and obviously 2.33.0 for selenium.

Answer 1

It turns out that this is a function error in phantomjs version 1.9.2. They are updated to the latest ghostdriver library (v1.4) and I can imagine where it was introduced. Ghostdriver adheres to the new Selenium protocol, using messages to create sessions and not using a location header. Selenium is now taking over the place, etc. From json in the message body. As it turned out, the error you see and what I saw is that you are using an old selenium jar that uses the old-style session creation protocol with the new version of selenium. At the moment, the answer to your question is: to return to phantomjs 1.9.1 , to upgrade your jar of selenium to 2.35.0 (see link below). To reproduce your error, I tested it with both ruby ​​and python selenium webdrivers and 2.33.0 selenium jar, working as a hub and phantomjs 1.9.2, working as a ghost worker.

Here is the same error described in the github issue:

https://github.com/ariya/phantomjs/issues/11610

I believe this is due to this particular commit. You can see that the title for "Location" has been deleted.

https://github.com/detro/ghostdriver/commit/60bf3c90aa825cc3db4fa899b6a67bb7f109d55d

Here is a description of the problem mentioned above: https://github.com/detro/ghostdriver/issues/247

From this you can see that it was a fix for working with the latest selenium-webdrivers protocol: "New specifications: https://code.google.com/p/selenium/wiki/JsonWireProtocol#/session Change in selenium: https: / /code.google.com/p/selenium/source/detail?r=8c3c65772d57 "

It also looks like Updating to the latest version of the selenium-webdriver-standalone jar will allow you to get 1.9.2 working. I confirmed that my ruby ​​webdriver can now successfully connect to 2.35.0 jar and phantomjs 1.9.2.

You can get the latest jar here:

https://code.google.com/p/selenium/downloads/detail?name=selenium-server-standalone-2.35.0.jar&can=2&q=