如何使用硒连接到Chromium Headless
问题内容:
我想将无头铬用于使用硒的自动化测试。(https://chromium.googlesource.com/chromium/src/+/lkgr/headless/README.md)
我确实已经在9222上运行了无头版本。因此,如果我打开http://10.252.100.33:9222/json/,我会得到
[ {
"description": "",
"devtoolsFrontendUrl": "/devtools/inspector.html?ws=127.0.0.1:9223/devtools/page/0261be06-1271-485b-bdff-48e443de7a91",
"id": "0261be06-1271-485b-bdff-48e443de7a91",
"title": "The Chromium Projects",
"type": "page",
"url": "https://www.chromium.org/",
"webSocketDebuggerUrl": "ws://127.0.0.1:9223/devtools/page/0261be06-1271-485b-bdff-48e443de7a91"
} ]
下一步,我想将硒连接到无头铬上。但是当我尝试
final DesiredCapabilities caps = DesiredCapabilities.chrome();
final WebDriver driver = new RemoteWebDriver(new URL("http://localhost:9222/json"), caps);
driver.get("http://www.google.com");
我确实得到以下注销
Jän 24, 2017 7:14:45 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFORMATION: Attempting bi-dialect session, assuming Postel's Law holds true on the remote end
Jän 24, 2017 7:14:45 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFORMATION: Falling back to original OSS JSON Wire Protocol.
Jän 24, 2017 7:14:45 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFORMATION: Falling back to straight W3C remote end connection
org.openqa.selenium.SessionNotCreatedException: Unable to create new remote session. desired capabilities = Capabilities [{browserName=chrome, version=, platform=ANY}], required capabilities = Capabilities [{}]
Build info: version: '3.0.1', revision: '1969d75', time: '2016-10-18 09:49:13 -0700'
System info: host: 'Geralds-MacBook-Pro.local', ip: '192.168.0.249', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.12.2', java.version: '1.8.0_111'
Driver info: driver.version: RemoteWebDriver
问题是:
- RemoteWebDriver是否是连接无头铬的正确驱动程序?
- 我阅读了有关DevTool协议(https://docs.google.com/presentation/d/1gqK9F4lGAY3TZudAtdcxzMQNEE7PcuQrGu83No3l0lw/)的信息,但是我不确定如何使用硒创建这样的客户端。
- 使用Chrome DevTools连接Chromium Headless的工作原理(https://developers.google.com/web/tools/chrome-devtools/remote-debugging/)除了一些分段保管库;-)
问题答案:
我认为自述文件有点误导。您不必自己启动Chromium,也可以使用RemoteWebDriver
。确保已安装chromedriver(https://sites.google.com/a/chromium.org/chromedriver/home)。
- 启动chromedriver(例如
./chromedriver
或./chromedriver --port=9515
) - 然后,您告诉chromedriver使用Chromium而不是Chrome
- 添加
--headless
为附加参数
代码应如下所示:
final ChromeOptions chromeOptions = new ChromeOptions();
chromeOptions.setBinary("/usr/bin/chromium-browser");
chromeOptions.addArguments("--headless");
desiredCapabilities.setCapability(ChromeOptions.CAPABILITY, chromeOptions);
WebDriver driver = new RemoteWebDriver(url, desiredCapabilities);
在Ubuntu Linux上为我工作。