我一直在爲此奮鬥了一個多月,並且已經達到了我的目標。用例如下:獲取Drive SDK和DocsList並行運行
1 - 當我的客戶端爲他的某個客戶端創建一個新文件時,他將其放入他的Google驅動器帳戶的文件夾中。該文件夾與他的客戶共享。由於Google沒有任何機制可以自動通知某個文件夾中與其共享的文件已更改,我必須寫一個文件。所以我有一個GAE/GWT應用程序,帶有一個按鈕Notify。該應用程序有一個掃描其客戶端文件夾的按鈕,如果該文件夾中有新文件,它會抓取與該文件夾共享的人員的電子郵件地址,並向他們發送一封電子郵件,告知他們有新文件。
2 - 定期他需要發送大量電子郵件給他的所有客戶。因此,在他的儀表板上是第二個按鈕,他格式化電子郵件並單擊按鈕,掃描儀轉到所有客戶端文件夾並編譯所有共享文件夾的人員列表。然後循環列表併發送電子郵件。
Drive SDK部分很簡單。直到我碰到與人分享文件夾的人才可用的牆,但沒有他們的電子郵件。所以我開始嘗試將舊的API DocsService與Drive SDK結合使用,以便獲取電子郵件地址。我梳通示例應用程序,我發現一個工具類八九不離十我想要做什麼,那就是:
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package com.voice.mailer.server;
import java.io.IOException;
import java.util.HashSet;
import java.util.logging.Logger;
import javax.servlet.http.HttpServletRequest;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.appengine.auth.oauth2.AppEngineCredentialStore;
import com.google.api.client.extensions.appengine.http.UrlFetchTransport;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.http.GenericUrl;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson.JacksonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.appengine.api.users.UserServiceFactory;
import com.google.common.base.Preconditions;
import com.google.gdata.client.docs.DocsService;
/**
* Utility class for JDO persistence, OAuth flow helpers, and others.
*
* @author Yaniv Inbar
*/
class Utils {
/** Global instance of the HTTP transport. */
static final HttpTransport HTTP_TRANSPORT = new UrlFetchTransport();
static Credential credential = null;
/** Global instance of the JSON factory. */
static final JsonFactory JSON_FACTORY = new JacksonFactory();
private static GoogleClientSecrets clientSecrets = null;
private static final Logger log = Logger.getLogger(Utils.class.getName());
static GoogleClientSecrets getClientCredential() throws IOException {
if (clientSecrets == null) {
clientSecrets = GoogleClientSecrets.load(JSON_FACTORY,
Utils.class.getResourceAsStream("/client_secrets.json"));
Preconditions
.checkArgument(
!clientSecrets.getDetails().getClientId()
.startsWith("Enter ")
&& !clientSecrets.getDetails()
.getClientSecret()
.startsWith("Enter "),
"Download client_secrets.json file from https://code.google.com/apis/console/?api=calendar "
+ "into calendar-appengine-sample/src/main/resources/client_secrets.json");
}
return clientSecrets;
}
static String getRedirectUri(HttpServletRequest req) {
GenericUrl url = new GenericUrl(req.getRequestURL().toString());
url.setRawPath("/oauth2callback");
return url.build();
}
static GoogleAuthorizationCodeFlow newFlow() throws IOException {
HashSet<String> s = new HashSet<String>();
s.add(DriveScopes.DRIVE_FILE);
s.add("https://docs.google.com/feeds/");
s.add("https://docs.googleusercontent.com/");
s.add("https://spreadsheets.google.com/feeds/");
s.add("http://www.google.com/accounts/AuthSubRequest");
s.add("http://schemas.google.com/acl/2007");
s.add("https://www.googleapis.com/auth/userinfo");
return new GoogleAuthorizationCodeFlow.Builder(HTTP_TRANSPORT,
JSON_FACTORY, getClientCredential(), s)
.setCredentialStore(new AppEngineCredentialStore())
.setAccessType("offline").build();
// http(s)://docs.google.com/feeds/
}
static Drive loadDriveClient() throws IOException {
if (credential == null) {
String userId = UserServiceFactory.getUserService()
.getCurrentUser().getUserId();
credential = newFlow().loadCredential(userId);
}
return new Drive.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential)
.build();
}
static DocsService loadDocsService(String applicationName) {
if (credential == null) {
String userId = UserServiceFactory.getUserService()
.getCurrentUser().getUserId();
try {
credential = newFlow().loadCredential(userId);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
DocsService service = new DocsService(applicationName);
log.info("token: " + credential.getAccessToken());
service.setOAuth2Credentials(credential);
// service.setHeader("Authorization",
// "Bearer " + credential.getAccessToken());
return service;
}
/**
* Returns an {@link IOException} (but not a subclass) in order to work
* around restrictive GWT serialization policy.
*/
static IOException wrappedIOException(IOException e) {
if (e.getClass() == IOException.class) {
return e;
}
return new IOException(e.getMessage());
}
private Utils() {
}
}
現在這個類處理驅動SDK部分很大,即時通訊能夠調用的loadDriveClient方法,我也得到一個類那準備搖滾樂。但是,當我打電話loadDocsService和調用一個方法,我不斷收到以下錯誤:
10, 2013 5:36:07 PM com.google.appengine.repackaged.org.apache.http.impl.client.DefaultRequestDirector handleResponse
WARNING: Authentication error: Unable to respond to any of these challenges: {authsub=WWW-Authenticate: AuthSub realm="http://www.google.com/accounts/AuthSubRequest"}
com.google.gdata.client.GoogleService$SessionExpiredException: OK
<HTML>
<HEAD>
<TITLE>Token invalid - AuthSub token has wrong scope</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Token invalid - AuthSub token has wrong scope</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:652)
at com.google.gdata.client.Service.getFeed(Service.java:1017)
at com.voice.mailer.shared.DocumentList.getAclFeed(DocumentList.java:611)
at com.voice.mailer.server.NewFileProcessorImpl.processNewFiles(NewFileProcessorImpl.java:68)
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:561)
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.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:123)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:61)
at org.mortbay.jetty.servlet.ServletHandler$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:383)
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)
Mar 10, 2013 5:36:21 PM com.google.appengine.api.datastore.dev.LocalDatastoreService$PersistDatastore persist
INFO: Time to persist datastore: 6 ms
我已經試過所有我能想到的和每一個例子,我可以找到。我不知道爲什麼它沒有正確創建DocsService。你能給我任何想法,爲什麼這不起作用?
感謝
在上面的newFlow()方法中,該範圍已經列出。那是我嘗試的第一件事情之一。 – scphantm 2013-03-12 15:07:27
如何將Drive SDK範圍與文檔列表範圍一起添加? – user1828559 2013-03-15 01:50:35
看看我的課,那正是我所做的。 – scphantm 2013-03-15 13:31:29