Is there way to disable CORS check using RemoteWebDriver for SauceLabs

Question

Question says it all, I m trying to execute some selenium tests on SauceLabs, the test loads a webpage that makes a cross domain request. I was thinking is there a way to disable CORS, in platform-independent way through code.

Answer 1

While using ChromeDriver / Chrome combo to disable cors check you can use the --disable-web-security argument.

which is defined in content_switches.cc as:

// Don't enforce the same-origin policy. (Used by people testing their sites.)
const char kDisableWebSecurity[]            = "disable-web-security";

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Code samples:

• Windows:

  ChromeOptions options = new ChromeOptions();
  options.addArguments("--disable-web-security"); // don't enforce the same-origin policy
  options.addArguments("--disable-gpu"); // applicable to windows os only
  options.addArguments("--user-data-dir=~/chromeTemp"); // applicable to windows os only
  WebDriver driver = new ChromeDriver(options);
  driver.get("https://google.com");
  

• OSX:

  ChromeOptions options = new ChromeOptions();
  options.addArguments("--disable-web-security"); // don't enforce the same-origin policy
  options.addArguments("--user-data-dir=/tmp/chrome_dev_test");
  WebDriver driver = new ChromeDriver(options);
  driver.get("https://google.com");
  

• Linux

  ChromeOptions options = new ChromeOptions();
  options.addArguments("--disable-web-security"); // don't enforce the same-origin policy
  WebDriver driver = new ChromeDriver(options);
  driver.get("https://google.com");
  

Note: If you need access to local files for development/testing purposes like AJAX or JSON, you can use -–allow-file-access-from-files flag.

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References

• Disable same origin policy in Chrome
• Disable-web-security in Chrome 48+
• Run Chrome browser without CORS

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Outro

You can find a couple of relevant discussions in:

• Uncaught DOMException: Blocked a frame with origin “http://localhost:8080” from accessing a cross-origin frame while listing the iframes in page
• Error: Permission denied to access property “x” due to same/cross origin policy using Selenium?