我编写了一个小脚本，它接受我们公司收到的Epson打印机的默认IP地址，并根据要求自动更改。这是使用Selenium HtmlUnitDriver完成的。
脚本获取页面，插入新IP，然后提交它。因为一旦我们再次提交IP就会更改，页面不再是192.168.192.168，并且脚本不想完成。
以下是剧本：
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;
public class Main {
public static void main(String[] args) {
// Creating a new instance of the HTML unit driver.
WebDriver driver = new HtmlUnitDriver();
driver.get("http://192.168.192.168/ctcpip.htm");
// Find and change the IP Address field.
WebElement element = driver.findElement(By.name("IpAddress"));
element.clear();
element.sendKeys("192.168.192.169");
element.submit();
// Reset the printer. This changes it's IP as well, causing the initial driver page to no longer exist.
WebElement reset = driver.findElement(By.name("Submit"));
reset.submit();
// The script never gets this far.
driver.quit();
}
}
脚本在完成之前会超时。单击reset元素后，http://192.168.192.168/ctcpip.htm的初始URL实际上不存在，因为我们已将其更改为192.169.192.169。这是预期的行为，也是整个计划的重点。
控制台显示：
Nov 03, 2016 10:36:52 AM org.apache.http.impl.execchain.RetryExec execute
INFO: I/O exception (java.net.SocketException) caught when processing request to {}->http://192.168.192.168:80: Operation timed out
Nov 03, 2016 10:36:52 AM org.apache.http.impl.execchain.RetryExec execute
INFO: Retrying request to {}->http://192.168.192.168:80
Exception in thread "main" java.lang.RuntimeException: org.apache.http.conn.HttpHostConnectException: Connect to 192.168.192.168:80 [/192.168.192.168] failed: Operation timed out
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.doProcessPostponedActions(JavaScriptEngine.java:739)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.processPostponedActions(JavaScriptEngine.java:820)
at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1325)
at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1268)
at com.gargoylesoftware.htmlunit.html.HtmlElement.click(HtmlElement.java:1216)
at org.openqa.selenium.htmlunit.HtmlUnitWebElement.submit(HtmlUnitWebElement.java:175)
at Main.main(Main.java:19)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to 192.168.192.168:80 [/192.168.192.168] failed: Operation timed out
at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:140)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:318)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:219)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
at com.gargoylesoftware.htmlunit.HttpWebConnection.getResponse(HttpWebConnection.java:178)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection(WebClient.java:1313)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponse(WebClient.java:1230)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:338)
at com.gargoylesoftware.htmlunit.WaitingRefreshHandler.handleRefresh(WaitingRefreshHandler.java:92)
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeRefreshIfNeeded(HtmlPage.java:1446)
at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:306)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:475)
at com.gargoylesoftware.htmlunit.WebClient.loadDownloadedResponses(WebClient.java:2074)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.doProcessPostponedActions(JavaScriptEngine.java:733)
... 11 more
Caused by: java.net.ConnectException: Operation timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:72)
at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:123)
... 29 more
Process finished with exit code 1
如何告诉我的驱动程序实例页面已经变得非常酷，以便进程可以正常退出？
脚本需要才能到达driver.quit();行。
答案 0 :(得分：1)
如果某些东西在Selenium中不能使用findelement，那么每个人都使用js :)。 怎么样？
driver.executeScript("window.document.getElementsByName("Submit")[0].click()");
指数错误，需要调整
答案 1 :(得分：1)
如果提供的主机或主机IP地址在网络中不可用，它将退出驱动程序。
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;
public class Main {
public static void main(String[] args) {
// Creating a new instance of the HTML unit driver.
WebDriver driver = new HtmlUnitDriver();
try{
driver.get("http://192.168.192.168/ctcpip.htm");
WebElement element = driver.findElement(By.name("IpAddress"));
element.clear();
element.sendKeys("192.168.192.169");
element.submit();
// Reset the printer. This changes it's IP as well, causing the initial driver page to no longer exist.
WebElement reset = driver.findElement(By.name("Submit"));
reset.submit();
}
catch(HttpHostConnectException e){
System.out.println("Host Not Found : "+ e.getMessage())
}
finally{
driver.quit();
}
}
}
答案 2 :(得分：1)
你试过打电话吗
driver.quit();
之前
reset.submit();
？您不再使用驱动程序来检索任何元素，因此您可以在提交页面之前退出。
我希望它有所帮助。