基于 OAuth 安全协议的 Java 应用编程（4）示例更新
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- UID
- 1066743
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基于 OAuth 安全协议的 Java 应用编程（4）示例更新
使用 OAuth Access Token 访问 Google 服务接下来，我们使用上一节获得的 Access Token 设置 Google Service 的 OAuth 认证参数，然后从 Google Service 获取该用户的 Calendar 信息：
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| OAuthParameters para = new OAuthParameters();
para.setOAuthConsumerKey("www.example.com");
para.setOAuthToken(accessToken);
googleService.setOAuthCredentials(para, signer);
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清单 1 是完整的示例代码，供读者参考。
清单 1. 基于 OAuth 认证的 Google Service 消费方实现1
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| import java.util.Collection;
import java.util.Map;
import net.oauth.OAuth;
import net.oauth.OAuthAccessor;
import net.oauth.OAuthConsumer;
import net.oauth.client.OAuthClient;
public class DesktopClient {
private final OAuthAccessor accessor;
private OAuthClient oauthClient = null;
public DesktopClient(OAuthConsumer consumer) {
accessor = new OAuthAccessor(consumer);
}
public OAuthClient getOAuthClient() {
return oauthClient;
}
public void setOAuthClient(OAuthClient client) {
this.oauthClient = client;
}
//get the OAuth access token.
public String getAccessToken(String httpMethod,
Collection<? extends Map.Entry> parameters) throws Exception {
getOAuthClient().getRequestTokenResponse(accessor, null,parameters);
String authorizationURL = OAuth.addParameters(
accessor.consumer.serviceProvider.userAuthorizationURL,
OAuth.OAUTH_TOKEN, accessor.requestToken);
//Launch the browser and redirects user to authorization URL
Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler "
+ authorizationURL);
//wait for user's authorization
System.out.println("Please authorize your OAuth request token. "
+ "Once that is complete, press any key to continue...");
System.in.read();
oauthClient.getAccessToken(accessor, null, null);
return accessor.accessToken;
}
}
import java.net.URL;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.spec.EncodedKeySpec;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.Collection;
import java.util.Map;
import com.google.gdata.client.GoogleService;
import com.google.gdata.client.authn.oauth.OAuthParameters;
import com.google.gdata.client.authn.oauth.OAuthRsaSha1Signer;
import com.google.gdata.client.authn.oauth.OAuthSigner;
import com.google.gdata.data.BaseEntry;
import com.google.gdata.data.BaseFeed;
import com.google.gdata.data.Feed;
import net.oauth.OAuth;
import net.oauth.OAuthConsumer;
import net.oauth.OAuthMessage;
import net.oauth.OAuthServiceProvider;
import net.oauth.client.OAuthClient;
import net.oauth.client.httpclient4.HttpClient4;
import net.oauth.example.desktop.MyGoogleService;
import net.oauth.signature.OAuthSignatureMethod;
import net.oauth.signature.RSA_SHA1;
public class GoogleOAuthExample {
//Note, use the private key of your self-signed X509 certificate.
private static final String PRIVATE_KEY = "XXXXXXXX";
public static void main(String[] args) throws Exception {
KeyFactory fac = KeyFactory.getInstance("RSA");
//PRIVATE_KEY is the private key of your self-signed X509 certificate.
EncodedKeySpec privKeySpec = new PKCS8EncodedKeySpec(
OAuthSignatureMethod.decodeBase64(PRIVATE_KEY));
fac = KeyFactory.getInstance("RSA");
PrivateKey privateKey = fac.generatePrivate(privKeySpec);
OAuthServiceProvider serviceProvider = new OAuthServiceProvider(
//used for obtaining a request token
//"https://www.google.com/accounts/OAuthGetRequestToken",
//used for authorizing the request token
"https://www.google.com/accounts/OAuthAuthorizeToken",
//used for upgrading to an access token
"https://www.google.com/accounts/OAuthGetAccessToken");
OAuthConsumer oauthConsumer = new OAuthConsumer(null
, "lszhy.weebly.com" //consumer key
, "hIsGnM+T4+86fKNesUtJq7Gs" //consumer secret
, serviceProvider);
oauthConsumer.setProperty(OAuth.OAUTH_SIGNATURE_METHOD, OAuth.RSA_SHA1);
oauthConsumer.setProperty(RSA_SHA1.PRIVATE_KEY, privateKey);
DesktopClient client = new DesktopClient(oauthConsumer);
client.setOAuthClient(new OAuthClient(new HttpClient4()));
Collection<? extends Map.Entry> parameters =
OAuth.newList("scope","http://www.google.com/calendar/feeds/");
String accessToken = client.getAccessToken(OAuthMessage.GET,parameters);
//Make an OAuth authorized request to Google
// Initialize the variables needed to make the request
URL feedUrl = new URL(
"http://www.google.com/calendar/feeds/default/allcalendars/full");
System.out.println("Sending request to " + feedUrl.toString());
System.out.println();
GoogleService googleService = new GoogleService("cl", "oauth-sample-app");
OAuthSigner signer = new OAuthRsaSha1Signer(MyGoogleService.PRIVATE_KEY);
// Set the OAuth credentials which were obtained from the step above.
OAuthParameters para = new OAuthParameters();
para.setOAuthConsumerKey("lszhy.weebly.com");
para.setOAuthToken(accessToken);
googleService.setOAuthCredentials(para, signer);
// Make the request to Google
BaseFeed resultFeed = googleService.getFeed(feedUrl, Feed.class);
System.out.println("Response Data:");
System.out.println("==========================================");
System.out.println("|TITLE: " + resultFeed.getTitle().getPlainText());
if (resultFeed.getEntries().size() == 0) {
System.out.println("|\tNo entries found.");
} else {
for (int i = 0; i < resultFeed.getEntries().size(); i++) {
BaseEntry entry = (BaseEntry) resultFeed.getEntries().get(i);
System.out.println("|\t" + (i + 1) + ": "
+ entry.getTitle().getPlainText());
}
}
System.out.println("==========================================");
}
}
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