背景：写了一个爬虫程序使用的docker部署，部署后在docker中安装PhantomJS 比较麻烦，于是想到了再另一个docker容器中部署一个PhantomJS ，通过远程调用的方式来使用它

1.启动一个PhantomJS docker实例

[root@Ieat1 ~]# docker run -d --name phantomjs  -p 8910:8910 wernight/phantomjs phantomjs --webdriver=8910

2.通过程序远程调用

通过Java 调用:

    WebDriver driver = new RemoteWebDriver(
        new URL("http://127.0.0.1:8910"),
        DesiredCapabilities.phantomjs());

通过python调用，先运行 pip install selenium安装selenium

    from selenium import webdriver
    from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

    driver = webdriver.Remote(
        command_executor='http://127.0.0.1:8910',
        desired_capabilities=DesiredCapabilities.PHANTOMJS)

    driver.get('http://example.com')
    driver.find_element_by_css_selector('a[title="hello"]').click()

    driver.quit()

3.完整的代码段：

public class RemotePhantomjsTest {


    public static void main(String[] args) throws InterruptedException {
        DesiredCapabilities dc = new DesiredCapabilities();
        dc.setCapability("phantomjs.page.settings.userAgent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36");

        WebDriver webDriver = null;
        try {
            webDriver = new RemoteWebDriver(new URL("http://127.0.0.1:8910"), dc);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        try {
            webDriver.get("https://www.baidu.com/");
            WebElement webElement = webDriver.findElement(By.xpath("/html"));
            String content = webElement.getAttribute("outerHTML");
            System.out.println(content);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            webDriver.close();
        }
    }

}

监控一下docker的日志,发现调用成功

[root@Ieat1 ~]# docker logs -f phantomjs  
[INFO  - 2018-08-12T12:03:20.392Z] Session [b47e2840-9e27-11e8-81d3-1d2649e3289e] - page.settings - {"XSSAuditingEnabled":false,"javascriptCanCloseWindows":true,"javascriptCanOpenWindows":true,"javascriptEnabled":true,"loadImages":true,"localToRemoteUrlAccessEnabled":false,"userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36","webSecurityEnabled":true}
[INFO  - 2018-08-12T12:03:20.392Z] Session [b47e2840-9e27-11e8-81d3-1d2649e3289e] - page.customHeaders:  - {}
[INFO  - 2018-08-12T12:03:20.392Z] Session [b47e2840-9e27-11e8-81d3-1d2649e3289e] - Session.negotiatedCapabilities - {"browserName":"phantomjs","version":"2.1.1","driverName":"ghostdriver","driverVersion":"1.2.0","platform":"linux-unknown-64bit","javascriptEnabled":true,"takesScreenshot":true,"handlesAlerts":false,"databaseEnabled":false,"locationContextEnabled":false,"applicationCacheEnabled":false,"browserConnectionEnabled":false,"cssSelectorsEnabled":true,"webStorageEnabled":false,"rotatable":false,"acceptSslCerts":false,"nativeEvents":true,"proxy":{"proxyType":"direct"},"phantomjs.page.settings.userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36"}
[INFO  - 2018-08-12T12:03:20.392Z] SessionManagerReqHand - _postNewSessionCommand - New Session Created: b47e2840-9e27-11e8-81d3-1d2649e3289e

参考：

https://hub.docker.com/r/wernight/phantomjs/