Java GAE远程api:RemoteApiInstaller安装始终失败

：在应用程序引擎客户端上配置远程API

RemoteApiInsideAppEngineExample(String username, String password)
        throws IOException {
        // Authenticating with username and password is slow, so we'll do it
        // once during construction and then store the credentials for reuse.
        this.options = new RemoteApiOptions()
            .server("your_target_app_id.appspot.com", 443)
            .credentials(username, password);
        RemoteApiInstaller installer = new RemoteApiInstaller();
        installer.install(options);
        try {
            // Update the options with reusable credentials so we can skip
            // authentication on subsequent calls.
            options.reuseCredentials(username, installer.serializeCredentials());
        } finally {
            installer.uninstall();
        }
    }

在我的测试中，它总是抛出异常：

java.lang.IllegalArgumentException: charset may not be null or empty
    at com.google.appengine.repackaged.org.apache.commons.httpclient.util.EncodingUtil.getString(Unknown Source)
    at com.google.appengine.repackaged.org.apache.commons.httpclient.util.EncodingUtil.getString(Unknown Source)
    at com.google.appengine.tools.remoteapi.AppEngineClient$Response.getBodyAsString(AppEngineClient.java:138)
    at com.google.appengine.tools.remoteapi.RemoteApiInstaller.getAppIdFromServer(RemoteApiInstaller.java:318)
    at com.google.appengine.tools.remoteapi.RemoteApiInstaller.loginImpl(RemoteApiInstaller.java:278)
    at com.google.appengine.tools.remoteapi.RemoteApiInstaller.login(RemoteApiInstaller.java:239)
    at com.google.appengine.tools.remoteapi.RemoteApiInstaller.install(RemoteApiInstaller.java:106)

我确信用户名和密码是admin one，我使用GAE 1.7，联邦登录，高复制数据存储

有什么想法吗？

---

谢谢。

代码对我有效。您只需确保您的应用程序id替换了“您的\u target\u app\u id”，我想我找到了答案，我使用了联邦登录，而当前GAE远程API不支持联邦登录，这太糟糕了，以至于我花了很多时间进行调试