Appengine - Deployment of hidden folder

Question

To verify a SSL certificate, I need to upload a hidden folder ("/.well-known" containing some files to my application.

I am deploying java application with eclipse, but these files do not receive at the application on appengine. I guess they are filtered out.

I tried to add the hidden folder as static file to the appengine-web.xml, but it did not help.

<!-- Configure serving/caching of GWT files -->
<static-files>
    <include path="**" />
    <include path=".**" />
    <include path="**.*" expiration="0s" />
    <include path="**.well-known" expiration="0s" />
    <include path="**.nocache.*" expiration="0s" />
    <include path="**.cache.*" expiration="365d" />
    <include path="**.css" expiration="30d"/>
    <exclude path="**.gwt.rpc" />
    <exclude path="**.html" />
</static-files>

Any ideas how I could upload these folder and the files?

Answer 1

对于在 Google App Engine 中尝试以静态方式为 letencrypt 提供挑战并失败后来到这里的其他任何人，以下为我做了：（一个人可能实际上可以静态地做到这一点，但我没有尝试因为我不想花更多的时间尝试一些东西，而 Ian 显然尝试过，但无法使其工作 [也许在 Google App Engine 内部完成的复制命令忽略了以点开头的目录]）

摘自http://igorartamonov.com/2015/12/lets-encrypt-ssl-google-appengine/致谢 Igor Artamonov。

只需构建一个 servlet，如：

公共类 LetsencryptServlet 扩展 HttpServlet {

    public static final Map<String, String> challenges = new HashMap<String, String>();

    static {
        challenges.put("RzrvZ9gd7EH3i_TsJM-B0vdEMslD4oo_lwsagGskp6c",
                "RzrvZ9gd7EH3i_TsJM-B0vdEMslD4oo_lwsagGskp6c.ONrZa3UelibSWEX270nTUiRZKPFXw096nENWbMGw0-E");
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        if (!req.getRequestURI().startsWith("/.well-known/acme-challenge/")) {
            resp.sendError(404);
            return;
        }
        String id = req.getRequestURI().substring("/.well-known/acme-challenge/".length());
        if (!challenges.containsKey(id)) {
            resp.sendError(404);
            return;
        }
        resp.setContentType("text/plain");
        resp.getOutputStream().print(challenges.get(id));
    }
}

并添加到以下内容中web.xml：

<servlet>
    <servlet-name>letsencrypt</servlet-name>
    <servlet-class>...LetsencryptServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>letsencrypt</servlet-name>
    <url-pattern>/.well-known/acme-challenge/*</url-pattern>
</servlet-mapping>

当然，请确保 servlet 类具有您创建的 Servlet 的完整类路径。

该博客文章还涉及生成和安装证书所需的其他步骤。

伊恩：你确定你部署的servlet很好吗？检查日志，确保您正在测试正确的版本.. 也许您有编译问题..

干杯

Answer 2

我在尝试提供assetlinks.json文件时遇到了这个问题。确实看起来以 . 无法在 App Engine 的静态上下文中访问。João Antunes 解决方法的更通用版本如下。

首先，创建不带 . 并在其中放置任何所需的文件。

然后，我们需要创建一个 servlet，当收到对隐藏文件夹的请求时，该 servlet 将响应正确的数据。

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;

/**
 * Created by Will Calderwood on 17/05/2017.
 * <p>
 * It would appear to not be possible to upload hidden folders to app engine. So when files need
 * to be served from a hidden folder the URL can be bounced through this servlet
 */
public class StaticFileServer extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // We'll remove the dots from the path
        String uri = req.getRequestURI().replace("/.", "/");

        // Do anything else that needs doing here
        if (uri.toLowerCase().contains(".json")) {
            resp.setContentType("application/json");
        }

        // Read and return the resource from the non-hidden folder
        try (InputStream in = getServletContext().getResourceAsStream(uri)) {
            if (in == null){
                resp.sendError(404);
                return;
            }
            byte[] buffer = new byte[8192];
            int count;
            while ((count = in.read(buffer)) > 0) {
                resp.getOutputStream().write(buffer, 0, count);
            }
        }
    }
}

然后将以下内容添加到您的web.xml文件中，将隐藏文件夹指向我们的 servlet

<servlet>
    <servlet-name>StaticFileServer</servlet-name>
    <servlet-class>main.com.you.StaticFileServer</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>StaticFileServer</servlet-name>
    <url-pattern>/.well-known/*</url-pattern>
</servlet-mapping>