我正在尝试使用带有selenium的browsermob/browserup代理从chrome获取*.har日志。在本地计算机上以嵌入式模式与java一起使用：

dependencies{
    compile 'net.lightbody.bmp:browsermob-core:2.1.5'
    compile 'com.browserup:browserup-proxy-core:2.1.1'
    compile 'org.seleniumhq.selenium:selenium-chrome-driver:3.141.59'
}

当我尝试这个：

@SneakyThrows
public static void tryStackOverflow() {
    System.setProperty("webdriver.chrome.driver", "C:\\Chrome\\chromedriver\\chromedriver.exe");

    BrowserMobProxy browserMobProxy = new BrowserMobProxyServer();
    browserMobProxy.setTrustAllServers(true);
    browserMobProxy.start();

    Proxy seleniumProxy = ClientUtil.createSeleniumProxy(browserMobProxy);
    String hostIp = Inet4Address.getLocalHost().getHostAddress();
    seleniumProxy.setHttpProxy(hostIp + ":" + browserMobProxy.getPort());
    seleniumProxy.setSslProxy(hostIp + ":" + browserMobProxy.getPort());

    ChromeOptions launchOptions = new ChromeOptions();
    launchOptions.setProxy(seleniumProxy);
    launchOptions.setBinary("C:\\Chrome\\chrome.exe");
    launchOptions.addArguments(List.of("--ignore-certificate-errors"));
    ChromeDriver chrome = new ChromeDriver(launchOptions);

    browserMobProxy.newHar(); // creating new HAR

    chrome.get("https://www.stackoverflow.com/");
    List<HarEntry> entries = browserMobProxy.getHar().getLog().getEntries();
    for (HarEntry entry : entries) {
        System.out.println(entry.getRequest().getUrl());
    }

    try(OutputStream outputStream = Files.newOutputStream(Path.of(
            "C:\\stack.test.file.har"), StandardOpenOption.WRITE, StandardOpenOption.CREATE)
    ) {
        browserMobProxy.getHar().writeTo(outputStream);
    } catch (Exception ex) {
        log.info("Save error = ", ex);
    }

    browserMobProxy.stop();
    chrome.close();
}

一切正常：创建了新的chrome示例，浏览器导航到网站，然后“stack.test.file.har”文件充满了数据（harentries）。我不需要启动新的chrome示例，但需要连接到已有的chrome示例。执行此操作时，会得到空的har日志文件：

@SneakyThrows
public static void tryGitHub() {
    System.setProperty("webdriver.chrome.driver", "C:\\Chrome\\chromedriver\\chromedriver.exe");

    BrowserMobProxy browserMobProxy = new BrowserMobProxyServer();
    browserMobProxy.setTrustAllServers(true);
    browserMobProxy.start();

    Proxy seleniumProxy = ClientUtil.createSeleniumProxy(browserMobProxy);
    String hostIp = Inet4Address.getLocalHost().getHostAddress();
    seleniumProxy.setHttpProxy(hostIp + ":" + browserMobProxy.getPort());
    seleniumProxy.setSslProxy(hostIp + ":" + browserMobProxy.getPort());

    ChromeOptions connectOptions = new ChromeOptions();
    connectOptions.setProxy(seleniumProxy);
    connectOptions.setBinary("C:\\Chrome\\chrome.exe");
    connectOptions.addArguments(List.of("--ignore-certificate-errors"));
    connectOptions.setExperimentalOption("debuggerAddress", "localhost:4444"); // before this I started Chrome with --remote-debugging-port=4444
    ChromeDriver chrome = new ChromeDriver(connectOptions);

    browserMobProxy.newHar(); // creating new HAR

    chrome.get("https://www.github.com/"); // it navigates in existing chrome instance cool ...
    List<HarEntry> entries = browserMobProxy.getHar().getLog().getEntries();
    for (HarEntry entry : entries) { // ... but now this collection is empty :-(
        System.out.println(entry.getRequest().getUrl());
    }

    try(OutputStream outputStream = Files.newOutputStream(Path.of(
            "C:\\github.test.file.har"), StandardOpenOption.WRITE, StandardOpenOption.CREATE)
    ) {
        browserMobProxy.getHar().writeTo(outputStream);
    } catch (Exception ex) {
        log.info("Save error = ", ex);
    }

    browserMobProxy.stop();
}

它连接到端口4444上现有的chrome示例，并导航到“github.com”，我知道bcz我亲眼所见。很遗憾，*.har文件中现在没有数据。想不通，为什么？