【发布时间】：2020-11-30 11:35:27
【问题描述】：
在我的 java SWING 应用程序中，用户可以将文件传输到他的 DropBox 空间，我已经成功实现了该库，并且我正在尝试获取用户的访问令牌，而无需将其复制并粘贴到我的应用程序中。 根据documentation，我必须使用HttpServletRequest才能得到我想要的，但是我得到了一个异常，正如标题所写的那样。
public class LoginServlet implements HttpServletRequest {
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// read form fields
String token = request.getParameter("data-token");
// get response writer
PrintWriter writer = response.getWriter();
// build HTML code
String htmlRespone = "<html>";
htmlRespone += "<h2>token: " + token + "<br/>";
htmlRespone += "</html>";
// return response
writer.println(htmlRespone);
response.sendRedirect(Main.redirectUri);
}
@Override
public HttpSession getSession(boolean bln) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public HttpSession getSession() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
在主类中
LoginServlet request = new LoginServlet();
// Fetch the session to verify our CSRF token
HttpSession session = request.getSession(true);
String sessionKey = "dropbox-auth-csrf-token";
DbxSessionStore csrfTokenStore = new DbxStandardSessionStore(session, sessionKey);
DbxRequestConfig config = new DbxRequestConfig("User"); //Client name can be whatever you like
DbxAppInfo appInfo = new DbxAppInfo(App key, App secret);
DbxWebAuth webAuth = new DbxWebAuth(config, appInfo);
DbxWebAuth.Request authRequest = DbxWebAuth.newRequestBuilder()
.withRedirectUri(redirectUri, csrfTokenStore)
.build();
String url = webAuth.authorize(authRequest);
Desktop.getDesktop().browse(new URL(url).toURI());
DbxAuthFinish authFinish;
try {
authFinish = webAuth.finishFromRedirect(redirectUri, csrfTokenStore, request.getParameterMap());
} catch (DbxWebAuth.BadRequestException ex) {
//log("On /dropbox-auth-finish: Bad request: " + ex.getMessage());
//response.sendError(400);
return;
} catch (DbxWebAuth.BadStateException ex) {
// Send them back to the start of the auth flow.
//response.sendRedirect(redirectUri);
return;
} catch (DbxWebAuth.CsrfException ex) {
//log("On /dropbox-auth-finish: CSRF mismatch: " + ex.getMessage());
//response.sendError(403, "Forbidden.");
return;
} catch (DbxWebAuth.NotApprovedException ex) {
// When Dropbox asked "Do you want to allow this app to access your
// Dropbox account?", the user clicked "No".
return;
} catch (DbxWebAuth.ProviderException ex) {
//log("On /dropbox-auth-finish: Auth failed: " + ex.getMessage());
//response.sendError(503, "Error communicating with Dropbox.");
return;
} catch (DbxException ex) {
//log("On /dropbox-auth-finish: Error getting token: " + ex.getMessage());
//response.sendError(503, "Error communicating with Dropbox.");
return;
}
String accessToken = authFinish.getAccessToken();
// Save the access token somewhere (probably in your database) so you
// don't need to send the user through the authorization process again.
// Now use the access token to make Dropbox API calls.
DbxClientV2 client = new DbxClientV2(config, accessToken);
//...
全栈
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:873)
Caused by: java.lang.UnsupportedOperationException: Not supported yet.
at cloud.LoginServlet.getSession(LoginServlet.java:404)
at cloud_new.Main.main(Main.java:103)
行at cloud_new.Main.main(Main.java:103)
这是 HttpSession session = request.getSession(true);
【问题讨论】：
-
能否包含完整的异常堆栈？
-
HttpServletRequest 是从 Dropbox 向应用程序需要提供的 Servlet 的请求。您似乎在扩展 HttpServletRequest 但实现了一个 Servlet。您看到的异常是从您自己的代码中抛出的。
-
所以你重启了赏金？你还不明白，你想做的事是不可能的？
-
@Olivier 所以这个 (dropbox.github.io/dropbox-sdk-java/api-docs/v2.0.x/com/dropbox/…) 对你来说是假的？？？？我见过周围的 Java 应用程序这样做！！
-
该文档是关于 Web 应用程序的，而不是 Swing 应用程序（我在之前的评论中已经说过，你删除了，顺便说一句）。