在新标签页中进行下载时，如何在Selenium（Java）中无头下载文件？ [英] How to download files headless in Selenium (Java) when download happens in new tab?

问题描述

我有一个网页，当我单击一个按钮时，它会打开另一个选项卡，然后在其中几秒钟后下载一个csv文件。我试图无休止地自动执行此操作，但无法执行此操作。我正在使用以下代码。但是我认为以下解决方案适用于同一窗口中的下载。我该如何调整它才能在我的情况下正常工作？ .addArguments（-headless）;

  System.setProperty（ webdriver.chrome.driver，webdriverpath）; 
 ChromeOptions options = new ChromeOptions（）; 
 options.setExperimentalOption（ useAutomationExtension，false）; 
 options.addArguments（-test-type）; 
 options.addArguments（-headless）; 
 options.addArguments（-disable-extensions）; 
 ChromeDriverService driverService = ChromeDriverService.createDefaultService（）; 
 
 
 HashMap< String，Object> chromePrefs = new HashMap< String，Object>（）; 
 chromePrefs.put（ profile.default_content_settings.popups，0）; 
 chromePrefs.put（ download.default_directory，downloadFilepath）; 
 options.setExperimentalOption（ prefs，chromePrefs）; 
 
 
 ChromeDriver驱动程序=新的C​​hromeDriver（driverService，options）; 
 
 Map< String，Object> commandParams = new HashMap<>（）; 
 commandParams.put（ cmd， Page.setDownloadBehavior）; 
 Map< String，String> params = new HashMap<>（）; 
 params.put（ behavior， allow）; 
 params.put（ downloadPath，downloadFilepath）; 
 commandParams.put（ params，params）; 
 ObjectMapper objectMapper = new ObjectMapper（）; 
 HttpClient httpClient = HttpClientBuilder.create（）。build（）; 
字符串命令= objectMapper.writeValueAsString（commandParams）; 
字符串u = driverService.getUrl（）。toString（）+ / session / + driver.getSessionId（）+ / chromium / send_command; 
 HttpPost request = new HttpPost（u）; 
 request.addHeader（ content-type， application / json）; 
 request.setEntity（new StringEntity（command））; 
 httpClient.execute（request）; 
 
 
 
 
 //打开URL 
 //单击按钮
  

解决方案

以下是在Java中适用的解决方案：

单击下载按钮切换到新标签页并刷新：

  ArrayList< String> tabs2 = new ArrayList< String> （driver.getWindowHandles（））; 
 driver.switchTo（）。window（tabs2.get（1））; 
 driver.navigate（）。refresh（）; 
  

（就我而言，它无需刷新即可工作。因此，您也可以尝试不使用该语句）

I have a web page where when I click a button it opens another tab and then in it, downloads a csv file after few seconds. I was trying to automate this headlessly but I am unable to do so. I am using the below code. But I think the below solutions is for download happening in same window. How can I tweak it to work in my situation?

The code works fine and the file gets download if i run this normally (non headless) by commenting out the line options.addArguments("--headless");

    System.setProperty("webdriver.chrome.driver", webdriverpath);
    ChromeOptions options = new ChromeOptions();
    options.setExperimentalOption("useAutomationExtension", false);
    options.addArguments("--test-type");
    options.addArguments("--headless");
    options.addArguments("--disable-extensions"); 
    ChromeDriverService driverService = ChromeDriverService.createDefaultService();


    HashMap<String, Object> chromePrefs = new HashMap<String, Object>();
    chromePrefs.put("profile.default_content_settings.popups", 0);
    chromePrefs.put("download.default_directory", downloadFilepath);
    options.setExperimentalOption("prefs", chromePrefs);


    ChromeDriver driver = new ChromeDriver(driverService, options);

    Map<String, Object> commandParams = new HashMap<>();
    commandParams.put("cmd", "Page.setDownloadBehavior");
    Map<String, String> params = new HashMap<>();
    params.put("behavior", "allow");
    params.put("downloadPath", downloadFilepath);
    commandParams.put("params", params);
    ObjectMapper objectMapper = new ObjectMapper();
    HttpClient httpClient = HttpClientBuilder.create().build();
    String command = objectMapper.writeValueAsString(commandParams);
    String u = driverService.getUrl().toString() + "/session/" + driver.getSessionId() + "/chromium/send_command";
    HttpPost request = new HttpPost(u);
    request.addHeader("content-type", "application/json");
    request.setEntity(new StringEntity(command));
    httpClient.execute(request);




    //OPEN URL
    //Click Button

解决方案

Here is the solution that worked for in Java :

Right after clicking the download button switch to new tab and also do a refresh :

    ArrayList<String> tabs2 = new ArrayList<String> (driver.getWindowHandles());
    driver.switchTo().window(tabs2.get(1));
    driver.navigate().refresh();

(In my case it worked without the refresh. So you mey try without that statement aswell)

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