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When i set the ChromeDriver in headless mode it is unable to get the source of the page in any way. The getPageSource() is working when i set the driver in non-headless mode.

Here is my code:

String pageSource = "";
try 
 System.setProperty("webdriver.chrome.driver", "/usr/local/bin/chromedriver");
 System.setProperty("webdriver.chrome.silentOutput", "true");
 System.setProperty("webdriver.chrome.logfile", "/dev/null");
 java.util.logging.Logger.getLogger("org.openqa.selenium").setLevel(Level.OFF);

 ChromeOptions chromeOptions = new ChromeOptions();
 //chromeOptions.setBinary("/usr/bin/chromium");
 //chromeOptions.addArguments("--headless");
 chromeOptions.setHeadless(true);
 chromeOptions.setCapability(CapabilityType.UNEXPECTED_ALERT_BEHAVIOUR, UnexpectedAlertBehaviour.IGNORE);
 driver = new ChromeDriver(chromeOptions);

 if(driver!=null) 
 WebDriverWait wait = new WebDriverWait(driver, 60);
 wait.until(ExpectedConditions.visibilityOfElementLocated(By.tagName("body")));
 driver.manage().timeouts().pageLoadTimeout(60, TimeUnit.SECONDS);
 driver.get(link);
 pageSource = driver.getPageSource();
 driver.quit();
 

 catch(TimeoutException te) 
 //te.printStackTrace();
 catch (UnhandledAlertException eae) 
 try 
 Alert alert = driver.switchTo().alert();
 String alertText = alert.getText();
 System.out.println("Alert data: " + alertText);
 alert.accept();
 catch (NoAlertPresentException e) 
 // e.printStackTrace();
 
 catch (WebDriverException wde) 
 //wde.printStackTrace();
 

I have already tried to get the source with other ways like for example using JavaScript but result is same.