从Selenium和chromedriver下载文件 [英] Downloading a file from Selenium and chromedriver

问题描述

我无法让Selenium和Chrome（金丝雀）下载文件。
我使用的是Java和Chrome 59/60（因为我的测试是针对Windows和Linux的），并且我试图从网页开始下载文件。

当我从selenium不设置无头模式时，会打开chrome窗口并下载文件。

设置 - 无头标志时，chrome窗口不会打开，下载也不会开始。

  public static void chromeDownload（）throws IOException，InterruptedException {
 
 ChromeOptions options = new ChromeOptions（）; 
 String downloadFilepath =; 
 
 if（ValidateOS.isWindows（））{
 System.out.println（这是一个Windows系统。）; 
 System.setProperty（webdriver.chrome.driver，resources \\\\ driver \\chromedriver.exe）; 
 options.setBinary（C：\\ Users\\\\\\\\\\\\\\\\\\\\\\\\ \\chrome.exe）; 
 downloadFilepath =C：\\; 
} else if（ValidateOS.isUnix（））{
 System.out.println（这是一个Unix系统。）; 
 System.setProperty（webdriver.chrome.driver，resources / driver / chromedriver）; 
 options.setBinary（/ usr / bin / google-chrome）; 
 downloadFilepath =/ home / juri /; 
} 
 
 //管理下载
 HashMap< String，Object> chromePrefs = new HashMap<>（）; 
 chromePrefs.put（profile.default_content_settings.popups，0）; 
 chromePrefs.put（download.default_directory，downloadFilepath）; 
 
 //保存Chrome选项
 HashMap< String，Object> chromeOptionsMap = new HashMap<>（）; 
 options.setExperimentalOption（prefs，chromePrefs）; 
 options.addArguments（ -  headless --disable-gpu）; 
 
 DesiredCapabilities cap = DesiredCapabilities.chrome（）; 
 cap.setCapability（ChromeOptions.CAPABILITY，chromeOptionsMap）; 
 cap.setCapability（CapabilityType.ACCEPT_SSL_CERTS，true）; 
 cap.setCapability（ChromeOptions.CAPABILITY，options）; 
 
 ChromeDriver驱动程序=新的C​​hromeDriver（cap）; 
 
 driver.get（http：//localhost/my-test-page.html）; 
 
 driver.findElement（By.id（download））。click（）; 
 Thread.sleep（5000）; //等待5秒让一个小文件下载..是的..我知道... 
 driver.quit（）; 
} 
  

在点击开始。在无头模式下，它没有。

如何解决？

OT

我使用的Chrome Canary在v.60版本中提供了 - 无头功能。在没有GUI的服务器上运行抓取器非常方便。
但是，出于同样的原因......我发现在没有GUI的服务器上下载Chrome是没有用的。
除了主要问题之外，我想知道你是否会认为在Linux服务器上安装chrome是为了在无头模式下启动它。

更新：
我仍​​在寻找一个解决方案，如果有人会读到这个：/搜索结果有几个，我试了一下全部

解决方案

通过调整在此链接中找到的代码解决：

对于使用ChromeDriver和无头模式的Selenium下载文件那些想知道我的代码现在怎么样了......

  public static void chromeDownload（String address，String Headless，String DownDir）throws IOException ，InterruptedException {
 
 ChromeOptions options = new ChromeOptions（）; 
 String downloadFilepath = DownDir; 
 
 if（ValidateOS.isWindows（））{
 System.out.println（这是一个Windows系统。）; 
 System.setProperty（webdriver.chrome.driver，resources \\\\ driver \\chromedriver.exe）; 
 //options.setBinary(\"C:\\Users\\Juri\\AppData\\Local\\Google\\Chrome SxS\\Application\\ \\\chrome.exe）; 
 //如果这是注释，抓取器将使用主要的Chrome 
} else if（ValidateOS.isUnix（））{
 System.out.println（这是一个Unix系统。 ）; 
 System.setProperty（webdriver.chrome.driver，resources / driver / chromedriver）; 
 options.setBinary（/ usr / bin / google-chrome）; 
 
 
 switch（Headless.toUpperCase（））{
 caseTRUE：
 options.addArguments（ -  headless --disable-gpu） ; 
休息; 
 caseFALSE：
 default：
 options.addArguments（ -  window-size = 1152,768）; 
休息; 
} 
 options.addArguments（ -  test-type）; 
 options.addArguments（ -  disable-extension）; 
 
 ChromeDriverService driverService = ChromeDriverService.createDefaultService（）; 
 ChromeDriver驱动程序=新的C​​hromeDriver（driverService，options）; 
 
地图< String，Object> commandParams = new HashMap<>（）; 
 commandParams.put（cmd，Page.setDownloadBehavior）; 
 Map< String，String> params = new HashMap<>（）; 
 params.put（behavior，allow）; 
 params.put（downloadPath，downloadFilepath）; 
 params.put（cmd，Page.setDownloadBehavior）; 
 
 commandParams.put（params，params）; 
 ObjectMapper objectMapper = new ObjectMapper（）; 
 CloseableHttpClient httpClient = HttpClientBuilder.create（）。build（）; 
 String命令= 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）; 
 
 driver.get（address）; 
 
 driver.findElement（By.id（download））。click（）; 
 driver.quit（）; 
} 
  

I can't get Selenium and Chrome (Canary) to download a file. I'm using Java and and Chrome 59/60 (because my tests are both for Windows and Linux) and I'm trying to start the download of a file from a webpage.

When I, from selenium, do NOT set the headless mode, the chrome window opens and the file is downloaded.

When I do set the --headless flag, the chrome window does not open and the download does not start.

    public static void chromeDownload() throws IOException, InterruptedException{

            ChromeOptions options = new ChromeOptions();
            String downloadFilepath = "";

            if (ValidateOS.isWindows()){
                System.out.println("This is a Windows system.");
                System.setProperty("webdriver.chrome.driver", "resources\\driver\\chromedriver.exe");
                options.setBinary("C:\\Users\\Juri\\AppData\\Local\\Google\\Chrome SxS\\Application\\chrome.exe");
                downloadFilepath = "C:\\";
            } else if (ValidateOS.isUnix()){
                System.out.println("This is a Unix system.");
                System.setProperty("webdriver.chrome.driver", "resources/driver/chromedriver");
                options.setBinary("/usr/bin/google-chrome");
                downloadFilepath = "/home/juri/";
            }

            // Manage the download
            HashMap<String, Object> chromePrefs = new HashMap<>();
            chromePrefs.put("profile.default_content_settings.popups", 0);
            chromePrefs.put("download.default_directory", downloadFilepath);

            // Save Chrome Options
            HashMap<String, Object> chromeOptionsMap = new HashMap<>();
            options.setExperimentalOption("prefs", chromePrefs);
            options.addArguments("--headless --disable-gpu");

            DesiredCapabilities cap = DesiredCapabilities.chrome();
            cap.setCapability(ChromeOptions.CAPABILITY, chromeOptionsMap);
            cap.setCapability(CapabilityType.ACCEPT_SSL_CERTS, true);
            cap.setCapability(ChromeOptions.CAPABILITY, options);

            ChromeDriver driver = new ChromeDriver(cap);

            driver.get("http://localhost/my-test-page.html");

            driver.findElement(By.id("download")).click(); 
            Thread.sleep(5000); // wait 5 seconds for a small file to download.. yes.. I know...
            driver.quit();
        }

At the Click, in GUI mode the download starts. In Headless mode, it doesn't.

How to solve?

OT

I am using Chrome Canary which at its v.60 comes with the --headless feature. Ultra handy for running the grabber on a server without gui. But, for the same reason.. I find it useless to download Chrome on a server without GUI. Beside the main question.. I wonder if you, developers, think that it is okay to install chrome on a Linux server just for starting it in headless mode.

Update: I'm still looking for a solution if someone will ever read this :/ Search results there are a few and I tried them all

解决方案

Solved by adapting the code found at this link: Download files in Java, Selenium using ChromeDriver and headless mode

For those who wonder how's my code now...

public static void chromeDownload(String address, String Headless, String DownDir) throws IOException, InterruptedException{

    ChromeOptions options = new ChromeOptions();
    String downloadFilepath = DownDir;

    if (ValidateOS.isWindows()){
        System.out.println("This is a Windows system.");
        System.setProperty("webdriver.chrome.driver", "resources\\driver\\chromedriver.exe");
        //options.setBinary("C:\\Users\\Juri\\AppData\\Local\\Google\\Chrome SxS\\Application\\chrome.exe");
        // If this is commented, the grabber will use the main Chrome
    } else if (ValidateOS.isUnix()){
        System.out.println("This is a Unix system.");
        System.setProperty("webdriver.chrome.driver", "resources/driver/chromedriver");
        options.setBinary("/usr/bin/google-chrome");
    }

    switch (Headless.toUpperCase()){
        case "TRUE":
            options.addArguments("--headless --disable-gpu");
            break;
        case "FALSE":
        default:
            options.addArguments("--window-size=1152,768");
            break;
    }
    options.addArguments("--test-type");
    options.addArguments("--disable-extension");

    ChromeDriverService driverService = ChromeDriverService.createDefaultService();
    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);
    params.put("cmd", "Page.setDownloadBehavior");

    commandParams.put("params", params);
    ObjectMapper objectMapper = new ObjectMapper();
    CloseableHttpClient 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);

    driver.get(address);

    driver.findElement(By.id("download")).click(); 
    driver.quit();
}

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