无法以无头模式通过Google Chrome下载.csv文件

Question

我一直试图在Chrome headless模式下使用selenium 下载csv文件，但是对于我的情况来说，该文件不工作。我试图无头运行相同的脚本，并且可以正常工作。我在https://www.mockaroo.com/站点上尝试了相同的无头配置，并且可以正常工作。下面是我正在使用的Chrome无头配置

System.setProperty("webdriver.chrome.driver", Constants.CHROME_DRIVER);
ChromeOptions options = new ChromeOptions();
options.addArguments("--test-type");
options.addArguments("--headless");
options.addArguments("--disable-extensions"); //to disable browser extension popup
options.addArguments("window-size=1980,1080");
options.addArguments("--disable-web-security");
options.addArguments("--no-sandbox");
options.addArguments("--disable-gpu");
options.addArguments("--disable-popup-blocking");
options.addArguments("--start-maximized");
options.addArguments("--allow-running-insecure-content");
options.setExperimentalOption("w3c", false);
options.addArguments("--ignore-certificate-errors");
options.addArguments("user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36");

DesiredCapabilities cap = DesiredCapabilities.chrome();
cap.setCapability(ChromeOptions.CAPABILITY, options);

// set performance logger
// this sends Network.enable to chromedriver
LoggingPreferences logPrefs = new LoggingPreferences();
logPrefs.enable(LogType.PERFORMANCE, Level.ALL);
cap.setCapability("goog:loggingPrefs", logPrefs);

ChromeDriverService driverService = ChromeDriverService.createDefaultService();
driver = new ChromeDriver(driverService, cap);
String downloadFilepath = "C:\\Users\\User\\Downloads";
System.out.println(downloadFilepath);
Map < String, Object > commandParams = new HashMap<String, Object>();
commandParams.put("cmd", "Page.setDownloadBehavior");
Map < String, Object > params = new HashMap<String, Object>();
params.put("behavior", "allow");
params.put("download.prompt_for_download", false);
params.put("downloadPath", downloadFilepath);
commandParams.put("params", params);
ObjectMapper objectMapper = new ObjectMapper();
HttpClient httpClient = HttpClientBuilder.create().build();
try {
    String command = objectMapper.writeValueAsString(commandParams);
    String u = driverService.getUrl().toString() + "/session/" + ((ChromeDriver)driver).getSessionId() + "/chromium/send_command";
    System.out.println("U: " + u.toString());
    HttpPost request = new HttpPost(u);
    request.addHeader("content-type", "application/json");
    request.setEntity(new StringEntity(command));
    httpClient.execute(request);
} catch (Exception e) { }

driver.get(prop.getProperty("url"));

使用上面的驱动程序配置（在验证用户身份之后，我单击了提交表单数据的按钮，并得到以下响应：

Content-Disposition: attachment;filename=WIS_mop_mis3.csv 

下载文件。

[请在下面找到日志，在其中您可以看到突出显示的部分显示net::ERR_ABORTED，但对于无头和无头，我都会收到此错误；

无头模式的性能日志

任何人都知道，我在哪里做错了。

编辑：应用程序流程是，当用户单击导出按钮时，将打开一个新窗口，用户在其中填充数据并单击按钮，该按钮调用用于某种形式的验证的函数。验证后，它将使用document.formName.submit()提交表单。

Answer 1

我能够找出解决方案。下面是工作代码

System.setProperty("webdriver.chrome.driver", Constants.CHROME_DRIVER);
ChromeOptions options = new ChromeOptions();
options.addArguments("--test-type");
options.addArguments("--headless");
options.addArguments("--disable-extensions"); //to disable browser extension popup
options.addArguments("window-size=1980,1080");
options.addArguments("--disable-web-security");
options.addArguments("--no-sandbox");
options.addArguments("--disable-gpu");
options.addArguments("--disable-popup-blocking");
options.addArguments("--start-maximized");
options.addArguments("--allow-running-insecure-content");
options.setExperimentalOption("w3c", false);
options.addArguments("--ignore-certificate-errors");
options.addArguments("user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36");

HashMap<String, Object> chromePreferences = new HashMap<String, Object>();

// This part was missing in my old code.
chromePreferences.put("download.prompt_for_download", false);
chromePreferences.put("download.directory_upgrade", true);
chromePreferences.put("safebrowsing.enabled", false);
chromePreferences.put("profile.default_content_settings.popups", 0);
chromePreferences.put("safebrowsing.disable_download_protection", true);
chromePreferences.put("download.default_directory", downloadFilepath);
options.setExperimentalOption("prefs", chromePreferences);

DesiredCapabilities cap = DesiredCapabilities.chrome();
cap.setCapability(ChromeOptions.CAPABILITY, options);

// set performance logger
// this sends Network.enable to chromedriver
LoggingPreferences logPrefs = new LoggingPreferences();
logPrefs.enable(LogType.PERFORMANCE, Level.ALL);
cap.setCapability("goog:loggingPrefs", logPrefs);

ChromeDriverService driverService = ChromeDriverService.createDefaultService();
driver = new ChromeDriver(driverService, cap);
String downloadFilepath = "C:\\Users\\User\\Downloads";
System.out.println(downloadFilepath);
Map < String, Object > commandParams = new HashMap<String, Object>();
commandParams.put("cmd", "Page.setDownloadBehavior");
Map < String, Object > params = new HashMap<String, Object>();
params.put("behavior", "allow");
params.put("downloadPath", downloadFilepath);
commandParams.put("params", params);
ObjectMapper objectMapper = new ObjectMapper();
HttpClient httpClient = HttpClientBuilder.create().build();
try {
    String command = objectMapper.writeValueAsString(commandParams);
    String u = driverService.getUrl().toString() + "/session/" + ((ChromeDriver)driver).getSessionId() + "/chromium/send_command";
    System.out.println("U: " + u.toString());
    HttpPost request = new HttpPost(u);
    request.addHeader("content-type", "application/json");
    request.setEntity(new StringEntity(command));
    httpClient.execute(request);
} catch (Exception e) { }

这篇文章帮助我解决了此问题https://stackoverflow.com/a/52384942/6017332