如何在Selenium Java中配置Vaadin TestBench的代理设置？

Alright, let's work through your proxy configuration issues and get your Vaadin TestBench license verification up and running with IE Driver. First, let's spot the inconsistencies in your current code, then walk through the correct setup steps.

Issues in Your Current Code #

• You're mixing two proxy configuration approaches: manually setting https.proxyHost/http.proxyPort and enabling java.net.useSystemProxies. These can conflict—when you enable system proxies, the manual property settings are often ignored, and vice versa. Pick one approach instead of combining them.
• IE Driver requires explicit proxy configuration separate from Java system properties. Just setting the system properties won't automatically apply to the IE browser instance launched by the driver.

Correct Proxy Configuration Options #

Option 1: Use System-Level Proxy Settings (Recommended) #

If your operating system is already configured with the correct proxy, use this approach to inherit those settings:

// Enable system proxy inheritance for Java
System.setProperty("java.net.useSystemProxies", "true");

// Configure IE Driver to use the system proxy
InternetExplorerOptions ieOptions = new InternetExplorerOptions();
ieOptions.useSystemProxy();

// Initialize the driver with the configured options
System.setProperty("webdriver.ie.driver", "C:\\Users\\ProjectJars\\Selenium\\IEDriiver\\IEDriverServer_Win32_3.9.0\\IEDriverServer.exe");
setDriver(new InternetExplorerDriver(ieOptions));

Option 2: Manually Specify Proxy Details #

If you need to use a specific proxy (bypassing system settings), configure both Java system properties and IE Driver explicitly:

// Set proxy properties for Java (for Vaadin license verification)
System.setProperty("http.proxyHost", "www-proxy.cccc.cccccccc.de");
System.setProperty("http.proxyPort", "1234");
System.setProperty("https.proxyHost", "www-proxy.cccc.cccccccc.de");
System.setProperty("https.proxyPort", "1234");
// Add internal domains that don't need proxy (adjust as needed)
System.setProperty("http.nonProxyHosts", "localhost|127.0.0.1|*.your-internal-domain.com");
System.setProperty("https.nonProxyHosts", "localhost|127.0.0.1|*.your-internal-domain.com");

// Configure proxy directly for IE Driver
Proxy testProxy = new Proxy();
testProxy.setHttpProxy("www-proxy.cccc.cccccccc.de:1234");
testProxy.setSslProxy("www-proxy.cccc.cccccccc.de:1234");

InternetExplorerOptions ieOptions = new InternetExplorerOptions();
ieOptions.setProxy(testProxy);

// Initialize the driver
System.setProperty("webdriver.ie.driver", "C:\\Users\\ProjectJars\\Selenium\\IEDriiver\\IEDriverServer_Win32_3.9.0\\IEDriverServer.exe");
setDriver(new InternetExplorerDriver(ieOptions));

Critical IE Driver Notes #

• Consistent Protected Mode Settings: All security zones in IE (Internet, Local Intranet, Trusted Sites, Restricted Sites) must have Protected Mode either enabled or disabled uniformly. You can adjust this in IE's Internet Options > Security tab. Mismatched settings will cause the driver to fail to launch.
• Version Compatibility: Ensure your IEDriverServer version matches your IE browser version and is compatible with your Selenium version (3.9.0 works best with IE 11).
• Proxy Access Permissions: Verify that your proxy allows traffic to Vaadin's license verification servers (typically domains under vaadin.com). If the proxy blocks these requests, license validation will fail even with correct configuration.

内容的提问来源于stack exchange，提问作者RamanaMuttana