OK，没有这方面的反应就是我的工作围绕它。
我放弃了使用OAuth ... Google只要求“实验性”的地位这个反正所以也许它根本还没有工作。
但是我得到使用的ClientLogin协议从我的测试客户端，我根据这个就非常有用的文章http://www.geekyblogger.com/2011/05/using-clientlogin-to-do-authentication.html了良好的效果（等同于做一个手动登录到谷歌帐户就像使用Gmail时，你做的一个）
。我不得不在几个方面扩展，代码如下：
import java.io.File;
import java.io.InputStream;
import java.io.LineNumberReader;
import java.io.StringReader;
import java.nio.charset.Charset;
import org.apache.commons.io.IOUtils;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import com.google.appengine.repackaged.com.google.common.io.Files;
import com.google.cloud.sql.jdbc.internal.Charsets;
public class Login {
public static void main(String[] args) throws Exception {
// This file contains my
// google password. Note that this has to be an app-specific
// password if you use 2-step verification
File passFile = new File("/Users/me/pass.txt");
String pass = Files.toString(passFile, Charsets.UTF_8);
String authCookie = loginToGoogle("[email protected]", pass,
"http://myapp.appspot.com");
DefaultHttpClient client = new DefaultHttpClient();
// A te
HttpGet get = new HttpGet("http://myapp.appspot.com/rest/blah");
get.setHeader("Cookie", authCookie);
HttpResponse response = client.execute(get);
response.getEntity().writeTo(System.out);
}
public static String loginToGoogle(String userid, String password,
String appUrl) throws Exception {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(
"https://www.google.com/accounts/ClientLogin");
MultipartEntity reqEntity = new MultipartEntity();
reqEntity.addPart("accountType", new StringBody("HOSTED_OR_GOOGLE",
"text/plain", Charset.forName("UTF-8")));
reqEntity.addPart("Email", new StringBody(userid));
reqEntity.addPart("Passwd", new StringBody(password));
reqEntity.addPart("service", new StringBody("ah"));
reqEntity.addPart("source", new StringBody(
"YourCompany-YourApp-YourVersion"));
post.setEntity(reqEntity);
HttpResponse response = client.execute(post);
if (response.getStatusLine().getStatusCode() == 200) {
InputStream input = response.getEntity().getContent();
String result = IOUtils.toString(input);
String authToken = getAuthToken(result);
post = new HttpPost(appUrl + "/_ah/login?auth=" + authToken);
response = client.execute(post);
Header[] cookies = response.getHeaders("SET-COOKIE");
for (Header cookie : cookies) {
if (cookie.getValue().startsWith("ACSID=")) {
return cookie.getValue();
}
}
throw new Exception("ACSID cookie cannot be found");
} else
throw new Exception("Error obtaining ACSID");
}
private static String getAuthToken(String responseText) throws Exception {
LineNumberReader reader = new LineNumberReader(new StringReader(
responseText));
String line = reader.readLine();
while (line != null) {
line = line.trim();
if (line.startsWith("Auth=")) {
return line.substring(5);
}
line = reader.readLine();
}
throw new Exception("Could not find Auth token");
}
}