问题描述

我正在尝试开始使用 selenium，并已下载 chrome 驱动程序并放入我的类路径中.我现在只是想获得标题，看看我是否可以让它工作.目前的代码如下所示:

I'm trying to get started using selenium and have downloaded a chrome driver and put into my classpath. I'm just trying to get the title right now to see if I can get it to work. Code currently looks like this:

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class Flows {

    public static void main(String[] args) {

        System.setProperty("webdriver.chrome.driver", "/Users/mn/Desktop/project/turv/src/main/chromedriver");
        WebDriver driver = new ChromeDriver();
        String baseUrl = "http://google.dk/";
        driver.get(baseUrl);
        System.out.println(driver.getTitle());
        driver.close();
    }
}

我希望我的输出类似于Google"，但我得到了这个错误:

I expected my output to be something along the lines of "Google", but I get this error instead:

Connected to the target VM, address: '127.0.0.1:55299', transport: 'socket'
Starting ChromeDriver (v2.8.241036) on port 2571
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
May 07, 2018 12:12:35 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
Disconnected from the target VM, address: '127.0.0.1:55299', transport: 'socket'
Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: Runtime.executionContextCreated has invalid 'context': {"auxData":{"frameId":"11895A1B77AC560388AA2919259E1422","isDefault":true},"id":1,"name":"","origin":"://"}
  (Session info: chrome=66.0.3359.139)
  (Driver info: chromedriver=2.8.241036,platform=Mac OS X 10.13.3 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 0 milliseconds
Build info: version: '3.11.0', revision: 'e59cfb3', time: '2018-03-11T20:26:55.152Z'
System info: host: 'cetreas-MBP', ip: 'fe80:0:0:0:c9e:2c67:1d27:4e0b%en0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.13.3', java.version: '1.8.0_161'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities {acceptSslCerts: true, applicationCacheEnabled: false, browserConnectionEnabled: false, browserName: chrome, chrome: {userDataDir: /var/folders/s7/lv2wt4t15cn...}, cssSelectorsEnabled: true, databaseEnabled: false, handlesAlerts: true, javascriptEnabled: true, locationContextEnabled: true, nativeEvents: true, platform: MAC, platformName: MAC, rotatable: false, takesHeapSnapshot: true, takesScreenshot: true, version: 66.0.3359.139, webStorageEnabled: true}
Session ID: ca1f4ba131e73c3d01058bec2b976d22
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:214)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:166)
    at org.openqa.selenium.remote.http.JsonHttpResponseCodec.reconstructValue(JsonHttpResponseCodec.java:40)
    at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:80)
    at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:44)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:545)
    at org.openqa.selenium.remote.RemoteWebDriver.get(RemoteWebDriver.java:273)
    at com.cetrea.flows.Flows.main(Flows.java:15)

我真的无法弄清楚错误试图告诉我什么.是因为我在网站完全加载之前要求标题吗?我需要在 getTitle() 之前添加某种 waitforit 命令吗?

I cant really figure out what the error is trying to tell me. Is it because I'm asking for the title before it has fully loaded the site maybe? Do I need to add some kind of waitforit command before the getTitle() ?

推荐答案

这个错误信息...

org.openqa.selenium.WebDriverException: unknown error: Runtime.executionContextCreated has invalid 'context': {"auxData":{"frameId":"11895A1B77AC560388AA2919259E1422","isDefault":true},"id":1,"name":"","origin":"://"}

...暗示 ChromeDriver 无法启动/生成新的 WebBrowser 即 Chrome 浏览器 会话.

...implies that the ChromeDriver was unable to initiate/spawn a new WebBrowser i.e. Chrome Browser session.

您的主要问题是您使用的二进制文件之间的版本兼容性，如下所示:

Your main issue is the version compatibility between the binaries you are using as follows :

• 您使用的是chromedriver=2.8，它相当古老.
• 您正在使用 chrome=66.0
• ChromeDriver v2.38 的发行说明明确提及以下内容:

支持 Chrome v65-67

所以 ChromeDriver 版本 (v2.8) 和 Chrome 浏览器 版本 (v66.0) 之间存在明显的不匹配)

So there is a clear mismatch between ChromeDriver version (v2.8) and the Chrome Browser version (v66.0)

• 将 ChromeDriver 升级到当前的 ChromeDriver v2.38 级.
• 将 Chrome 版本保持在 Chrome v66.x 级别.(根据 ChromeDriver v2.38 发行说明)
• 清理你的项目工作区通过你的IDE和重建你的项目只需要依赖.
• 使用 CCleaner 工具清除之前和之后的所有操作系统杂务测试套件的执行.
• 如果您的基础 Web Client 版本太旧，请通过 <卸载它em>Revo Uninstaller 并安装最新的 GA 和发布版本的 Web 客户端.
• 进行一次系统重启.
• 执行你的 @Test.
• 总是在 tearDown(){} 方法中调用 driver.quit() 来关闭 &优雅地销毁 WebDriver 和 Web Client 实例.

• Upgrade ChromeDriver to current ChromeDriver v2.38 level.
• Keep Chrome version at Chrome v66.x levels. (as per ChromeDriver v2.38 release notes)
• Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
• Use CCleaner tool to wipe off all the OS chores before and after the execution of your test Suite.
• If your base Web Client version is too old, then uninstall it through Revo Uninstaller and install a recent GA and released version of Web Client.
• Take a System Reboot.
• Execute your @Test.
• Always invoke driver.quit() within tearDown(){} method to close & destroy the WebDriver and Web Client instances gracefully.

这篇关于WebDriverException:未知错误:Runtime.executionContextCreated 具有无效的“上下文":初始化 Chrome 浏览器时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！