我正在开发一个 GWT/GAE java 应用程序，它
- 只需通过 GWT 地理定位实现获取用户位置（效果很好）
- 单击按钮时应将纬度、经度和准确度写入 Google 电子表格
当我单击“保存到电子表格”按钮时，我在 Eclipse 控制台中收到以下错误消息：
04.09.2012 16:44:01 com.google.appengine.repackaged.org.apache.http.impl.client.DefaultRequestDirector handleResponse
WARNUNG: Authentication error: Unable to respond to any of these challenges: {authsub=WWW-Authenticate: AuthSub realm="https://www.google.com/accounts//AuthSubRequest"}
com.google.gdata.client.GoogleService$SessionExpiredException: OK
<HTML>
<HEAD>
<TITLE>Token invalid - Invalid token: Stateless token parent not found</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Token invalid - Invalid token: Stateless token parent not found</H1>
<H2>Error 401</H2>
</BODY>
</HTML>
at com.google.gdata.client.http.GoogleGDataRequest.handleErrorResponse(GoogleGDataRequest.java:570)
at com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:560)
at com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:538)
at com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:536)
at com.google.gdata.client.Service.getFeed(Service.java:1135)
at com.google.gdata.client.Service.getFeed(Service.java:998)
at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:645)
at com.google.gdata.client.Service.getFeed(Service.java:1017)
at com.cloudpilots.locator.server.GSpreadsheetServiceImpl.insertRow(GSpreadsheetServiceImpl.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:115)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:370)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
所以它必须是凭证/令牌的问题。
下面是服务器端 RPC 服务代码：
public class GSpreadsheetServiceImpl extends RemoteServiceServlet implements
GSpreadsheetService {
@Override
public void insertRow(String latitude, String longitude, String accuracy) {
try {
String userId = UserServiceFactory.getUserService().getCurrentUser().getUserId();
Credential credential = OAuth2Utils.initializeFlow().loadCredential(userId);
SpreadsheetService service = new SpreadsheetService("Locator-v1");
service.setOAuth2Credentials(credential);
// Define the URL to request. This should never change.
URL SPREADSHEET_FEED_URL = new URL(
"https://spreadsheets.google.com/feeds/spreadsheets/private/full");
// Make a request to the API and get all spreadsheets.
SpreadsheetFeed feed = service.getFeed(SPREADSHEET_FEED_URL,
SpreadsheetFeed.class);
List<SpreadsheetEntry> spreadsheets = feed.getEntries();
// TODO: Choose a spreadsheet more intelligently based on your
// app's needs.
SpreadsheetEntry spreadsheet = spreadsheets.get(0);
for (SpreadsheetEntry spreadsheetEntry : spreadsheets) {
if (spreadsheetEntry.getKey() == "MY_SPREADSHEET_KEY") {
spreadsheet = spreadsheetEntry;
break;
}
}
// Get the first worksheet of the first spreadsheet.
// TODO: Choose a worksheet more intelligently based on your
// app's needs.
WorksheetFeed worksheetFeed = service.getFeed(
spreadsheet.getWorksheetFeedUrl(), WorksheetFeed.class);
List<WorksheetEntry> worksheets = worksheetFeed.getEntries();
WorksheetEntry worksheet = worksheets.get(0);
// Fetch the list feed of the worksheet.
URL listFeedUrl = worksheet.getListFeedUrl();
ListFeed listFeed = service.getFeed(listFeedUrl, ListFeed.class);
// Create a local representation of the new row.
ListEntry row = new ListEntry();
row.getCustomElements().setValueLocal("Latitude", latitude);
row.getCustomElements().setValueLocal("Longitude", longitude);
row.getCustomElements().setValueLocal("Accuracy", accuracy);
// Send the new row to the API for insertion.
row = service.insert(listFeedUrl, row);
} catch (ServiceException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
这是 OAuth2Utils 类：
public class OAuth2Utils {
/** Global instance of the HTTP transport. */
static final HttpTransport HTTP_TRANSPORT = new UrlFetchTransport();
/** Global instance of the JSON factory. */
static final JsonFactory JSON_FACTORY = new JacksonFactory();
static String getRedirectUri(HttpServletRequest req) {
GenericUrl url = new GenericUrl(req.getRequestURL().toString());
url.setRawPath("/oauth2callback");
return url.build();
}
static GoogleAuthorizationCodeFlow initializeFlow() throws IOException {
return new GoogleAuthorizationCodeFlow.Builder(HTTP_TRANSPORT,
JSON_FACTORY, "MY_CLIENT_ID",
"MY_KEY",
Collections.singleton("https://spreadsheets.google.com/feeds/"))
.setCredentialStore(new AppEngineCredentialStore())
.setAccessType("offline").build();
}
}
有谁知道问题可能是什么？
此致，
尤里维恩斯