我正在使用selenium,如果现有浏览器会话(对我来说Chrome)当前存在,我想附加一个webdriver实例。我不想打开新的浏览器窗口/会话。我用google搜索并看到,有一些方法可以通过这些网站上的描述来实现这一点:
我在最新版本中使用ChromeDriver 2.29。
我的代码现在看起来如下:
public static void main(String[] args) throws Exception {
// starting Chrome Webdriver server
ChromeDriverService service = new ChromeDriverService.Builder()
.usingDriverExecutable(new File("D:\\Development\\chromedriver\\chromedriver.exe"))
.usingAnyFreePort()
.build();
service.start();
WebDriver driver = new CustomRemoteWebDriver(service.getUrl(),DesiredCapabilities.chrome());
driver.get("http://www.google.com");
WebDriver driver2 = new CustomRemoteWebDriver(service.getUrl(),DesiredCapabilities.chrome());
// here I am expecting www.google.com from last driver instance, because it should have the same session
System.out.println(driver2.getCurrentUrl());
driver.quit();
driver2.quit();
}
扩展的RemoteWebDriver,用于检查会话是否已存在:
public class CustomRemoteWebDriver extends RemoteWebDriver {
public static String sessiondIdPath = "c:\\automation\\sessionid";
public CustomRemoteWebDriver(URL remoteAddress, Capabilities desiredCapabilities) {
super(remoteAddress, desiredCapabilities);
}
@Override
protected void startSession(Capabilities desiredCapabilities) {
String sid = getPreviousSessionIdFromSomeStorage();
if (sid != null) {
setSessionId(sid);
try {
getCurrentUrl();
} catch (WebDriverException e) {
// session is not valid
e.printStackTrace();
sid = null;
}
}
if (sid == null) {
super.startSession(desiredCapabilities);
saveSessionIdToSomeStorage(getSessionId().toString());
}
}
private void saveSessionIdToSomeStorage(String sessionId) {
try {
FileUtils.writeStringToFile(new File(sessiondIdPath), sessionId, Charset.defaultCharset());
} catch (IOException e) {
e.printStackTrace();
}
}
private String getPreviousSessionIdFromSomeStorage() {
String sessionId;
try {
List<String> sidText = FileUtils.readLines(new File(sessiondIdPath), Charset.defaultCharset());
sessionId = sidText.get(0);
} catch (Exception e) {
return null;
}
return sessionId;
}
}
和pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.andy.selenium</groupId>
<artifactId>remotewebdriverexample</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-java -->
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.4.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.appium/java-client -->
<dependency>
<groupId>io.appium</groupId>
<artifactId>java-client</artifactId>
<version>4.1.2</version>
</dependency>
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
假设我当前没有保存sessionId:启动driver1
并转到www.google.com按预期工作。在driver2
的初始化时,CustomRemoteWebDriver#startSession
中抛出了WebDriverException。所以它正在打印堆栈跟踪,sessionId似乎无效。 stacktrace的输出如下:
启动ChromeDriver 2.29.461591 (62ebf098771772160f391d75e589dc567915b233)在31495港口只有当地的 允许连接。 Mai 25,2017 6:53:14 PM org.openqa.selenium.remote.ProtocolHandshake createSession 信息:检测到的方言:OSS
org.openqa.selenium.WebDriverException:没有命令或响应编解码器 已定义。无法继续构建信息:版本:'3.4.0', 版本:'未知',时间:'未知'系统信息:主持人: 'DESKTOP-AGEFV4C',ip:'192.168.134.1',os.name:'Windows 10', os.arch:'amd64',os.version:'10 .0',java.version:'1.8.0_121'驱动程序 info:driver.version:CustomRemoteWebDriver at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:154) 在 org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:637) 在 org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:694) 在 org.openqa.selenium.remote.RemoteWebDriver.getCurrentUrl(RemoteWebDriver.java:374) 在CustomRemoteWebDriver.startSession(CustomRemoteWebDriver.java:57) 在 org.openqa.selenium.remote.RemoteWebDriver。(RemoteWebDriver.java:137) 在 org.openqa.selenium.remote.RemoteWebDriver。(RemoteWebDriver.java:174) 在CustomRemoteWebDriver。(CustomRemoteWebDriver.java:22)at RemoteBrowserConnector.start(RemoteBrowserConnector.java:40)at RemoteBrowserConnector.main(RemoteBrowserConnector.java:26)Mai 25, 2017年下午6:53:18 org.openqa.selenium.remote.ProtocolHandshake createSession信息:检测到的方言:OSS
我已经通过更新this帖子建议的java客户端来尝试它,但它没有帮助。由于此异常,始终会打开一个新窗口。任何想法,我做错了什么?