【发布时间】：2011-12-05 10:19:57
【问题描述】：
我正在尝试编写一个应用程序，使用 Java API 在 Google 中添加/更新/删除域共享联系人。
当我尝试从 Google 删除创建的联系人时，我遇到了以下异常。
没有认证头信息
Caused by:
java.lang.NullPointerException: No authentication header information
at com.google.gdata.util.AuthenticationException.initFromAuthHeader(AuthenticationException.java:96)
at com.google.gdata.util.AuthenticationException.<init>(AuthenticationException.java:67)
at com.google.gdata.client.http.HttpGDataRequest.handleErrorResponse(HttpGDataRequest.java:564)
at com.google.gdata.client.http.GoogleGDataRequest.handleErrorResponse(GoogleGDataRequest.java:543)
at com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:536)
at com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:515)
at com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:515)
at com.google.gdata.client.Service.delete(Service.java:1560)
at com.google.gdata.client.GoogleService.delete(GoogleService.java:691)
at com.google.gdata.data.BaseEntry.delete(BaseEntry.java:647)
at com.visy.connector.synchronizer.impl.ContactSynchronizerImpl.deleteContact(ContactSynchronizerImpl.java:170)
at com.visy.connector.TestServlet.doGet(TestServlet.java:54)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
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:58)
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:122)
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.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:351)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
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)
以下是我用于 deleteContact 的代码
public String deleteContact(String contactId) {
String resultString = "Failed"
ContactEntry contactEntry = getContactFromGoogle(contactId);
try {
if (contactEntry != null) {
// deleting contact from Google
contactEntry.delete();
resultString = "Sucess";
} catch (IOException e) {
LOGGER.log(Level.SEVERE, e.getMessage());
} catch (ServiceException e) {
LOGGER.log(Level.SEVERE, e.getMessage());
}
return resultString;
}
public ContactEntry getContactFromGoogle(String contactId) {
ContactEntry contact = null;
ContactsService myService = getOAuthContactService("getContact");
try {
String urlStr =
http://www.google.com/m8/feeds/contacts/mydomain/full
+ "/" + contactId
+ "?xoauth_requestor_id=" + domainAdminEmail;
contact = myService.getEntry(new URL(urlStr),
ContactEntry.class);
}
} catch (Exception e) {
LOGGER.log(Level.SEVERE, e.getMessage());
}
return contact;
}
public ContactsService getOAuthContactService(String serviceName) {
final ContactsService myService = new ContactsService(serviceName);
GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters();
oauthParameters.setScope(Scope);
oauthParameters.setOAuthConsumerKey(ConsumerKey);
oauthParameters.setOAuthConsumerSecret(secret); OAuthSigner signer = new OAuthHmacSha1Signer();
try {
myService.setOAuthCredentials(oauthParameters, signer);
} catch (OAuthException e) {
LOGGER.log(Level.SEVERE, e.getMessage());
}
LOGGER.log(Level.INFO, "Created the Authenticated Contact Service");
return myService;
}
在上面的代码中，getContactFromGoogle() 方法返回了适当的联系人（根据日志和调试结果）。但是当我调用contactEntry.delete()时，会抛出“No Authentication Header Information”异常。
请帮助我找出代码可能出了什么问题。
问候， 尼尔扎里
【问题讨论】：
标签： java google-app-engine google-contacts-api