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GooglePlus OAuth2 and Example #208

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40 changes: 37 additions & 3 deletions pom.xml
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Expand Up @@ -28,6 +28,13 @@
<email>[email protected]</email>
<timezone>-3</timezone>
</developer>
<developer>
<id>ezgraphs</id>
<name>C S</name>
<email>[email protected]</email>
<timezone>-3</timezone>
</developer>

</developers>

<licenses>
Expand Down Expand Up @@ -56,17 +63,43 @@
<version>4.8.1</version>
<scope>test</scope>
</dependency>

<!-- Handle JSON using library rather than regexpOAuth20aServiceImpl -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>1.7.1</version>
<scope>compile</scope>
</dependency>


</dependencies>
<build>
<plugins>
<plugin>

<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<configuration>
<executable>java</executable>
<arguments>
<argument>-classpath</argument>
<classpath />
<argument>org.scribe.examples.GooglePlusExample</argument>
</arguments>
</configuration>
</plugin>


<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
<!--
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-gpg-plugin</artifactId>
Expand All @@ -80,6 +113,7 @@
</execution>
</executions>
</plugin>
-->
</plugins>
</build>
</project>
69 changes: 69 additions & 0 deletions src/main/java/org/scribe/builder/api/DefaultApi20a.java
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package org.scribe.builder.api;

import org.scribe.extractors.*;
import org.scribe.model.*;
import org.scribe.oauth.*;

/**
* Default implementation of the OAuth protocol, version 2.0 (draft 11)
*
* This class is meant to be extended by concrete implementations of the API,
* providing the endpoints and endpoint-http-verbs.
*
* If your Api adheres to the 2.0 (draft 11) protocol correctly, you just need to extend
* this class and define the getters for your endpoints.
*
* If your Api does something a bit different, you can override the different
* extractors or services, in order to fine-tune the process. Please read the
* javadocs of the interfaces to get an idea of what to do.
*
* @author Diego Silveira
*
*/
public abstract class DefaultApi20a extends DefaultApi20 implements Api
{

/**
* Returns the access token extractor.
*
* @return json token extractor
*/
public AccessTokenExtractor getAccessTokenExtractor() {
return new JsonTokenExtractor();
}

/**
* Returns the verb for the access token endpoint (defaults to GET)
*
* @return access token endpoint verb
*/
public Verb getAccessTokenVerb()
{
return Verb.POST;
}

/**
* Returns the URL that receives the access token requests.
*
* @return access token URL
*/
public abstract String getAccessTokenEndpoint();

/**
* Returns the URL where you should redirect your users to authenticate
* your application.
*
* @param config OAuth 2.0 configuration param object
* @return the URL where you should redirect your users
*/
public abstract String getAuthorizationUrl(OAuthConfig config);

/**
* {@inheritDoc}
*/
public OAuthService createService(OAuthConfig config)
{
return new OAuth20aServiceImpl(this, config);
}

}
36 changes: 36 additions & 0 deletions src/main/java/org/scribe/builder/api/GooglePlusApi.java
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package org.scribe.builder.api;

import org.scribe.builder.api.DefaultApi20a;
import org.scribe.extractors.AccessTokenExtractor;
import org.scribe.extractors.JsonTokenExtractor;
import org.scribe.model.OAuthConfig;
import org.scribe.model.Verb;
import org.scribe.utils.OAuthEncoder;

/**
* User: ezgraphs
* Date: 12/27/11
* Time: 8:54 AM
*/
public class GooglePlusApi extends DefaultApi20a {

private static final String BASE_URL = "https://accounts.google.com/o/oauth2";
private static final String AUTHORIZE_URL = BASE_URL + "/auth?response_type=code&client_id=%s&scope=%s&redirect_uri=%s";


@Override
public String getAccessTokenEndpoint() {

return BASE_URL + "/token";
}

@Override
public AccessTokenExtractor getAccessTokenExtractor() {
return new JsonTokenExtractor();
}

@Override
public String getAuthorizationUrl(OAuthConfig config) {
return String.format(AUTHORIZE_URL, config.getApiKey(), OAuthEncoder.encode(config.getScope()), OAuthEncoder.encode(config.getCallback()));
}
}
81 changes: 81 additions & 0 deletions src/main/java/org/scribe/examples/GooglePlusExample.java
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package org.scribe.examples;

import com.google.gson.*;
import java.util.*;
import org.scribe.builder.*;
import org.scribe.builder.api.*;
import org.scribe.model.*;
import org.scribe.oauth.*;

// https://developers.google.com/+/api/
// https://developers.google.com/+/api/latest/people/get#try-it
// http://code.google.com/apis/accounts/docs/OAuth2WebServer.html#callinganapi

// https://code.google.com/apis/console/#project:419708088990:quotas
// https://code.google.com/apis/console/#project:419708088990:access
// http://sites.google.com/site/gson/gson-user-guide#TOC-Overview

public class GooglePlusExample{

public static void main(String args[]) throws Exception {

String apiKey = "419708088990.apps.googleusercontent.com";
String secret = "tNpXobmvQ3tM2234BW2OsjXT";
String callback = "http://www.r-chart.com";
String scope = "https://www.googleapis.com/auth/plus.me";

OAuthService service = new ServiceBuilder()
.provider(GooglePlusApi.class)
.apiKey(apiKey)
.apiSecret(secret)
.callback(callback)
.scope(scope)
.build();

Scanner in = new Scanner(System.in);

System.out.println("Fetching the Authorization URL...");
String authorizationUrl = service.getAuthorizationUrl(null);
System.out.println("Got the Authorization URL!");
System.out.println("Now go and authorize Scribe here:");
System.out.println(authorizationUrl);
System.out.println("And paste the authorization code here");
System.out.print(">>");
String code = in.nextLine();

Verifier verifier = new Verifier(code);
System.out.println("Trading the Request Token for an Access Token...");

Token accessToken = service.getAccessToken(null, verifier);

System.out.println("Now we're going to access a protected resource...creating request");
String url = "https://www.googleapis.com/oauth2/v1/userinfo?access_token=" + accessToken.getToken();
System.out.println("Trying userInfo url: " + url);
OAuthRequest request = new OAuthRequest(Verb.GET, url);

System.out.println("Sending request... getting response");

Response response = request.send();
System.out.println("Got it! Lets see what we found...");
System.out.println();
System.out.println(response.getCode());
String b = response.getBody();
System.out.println(b);

String id = extractId(b);
System.out.println("Sending request... getting response");
request = new OAuthRequest(Verb.GET, "https://www.googleapis.com/plus/v1/people/me?access_token=" + accessToken.getToken());
response = request.send();
System.out.println("Got it! Lets see what we found...");
System.out.println(response.getCode());
System.out.println(response.getBody());

}

public static String extractId(String body) {
JsonParser parser = new JsonParser();
JsonElement e = parser.parse(body);
return e.getAsJsonObject().get("id").getAsString();
}

}
1 change: 0 additions & 1 deletion src/main/java/org/scribe/extractors/JsonTokenExtractor.java
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Expand Up @@ -10,7 +10,6 @@ public class JsonTokenExtractor implements AccessTokenExtractor
{
private Pattern accessTokenPattern = Pattern.compile("\"access_token\":\\s*\"(\\S*?)\"");

@Override
public Token extract(String response)
{
Preconditions.checkEmptyString(response, "Cannot extract a token from a null or empty String");
Expand Down
73 changes: 73 additions & 0 deletions src/main/java/org/scribe/oauth/OAuth20aServiceImpl.java
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package org.scribe.oauth;

import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
import org.scribe.builder.api.DefaultApi20a;
import org.scribe.builder.api.DefaultApi20;
import org.scribe.model.OAuthConfig;
import org.scribe.model.OAuthConstants;
import org.scribe.model.OAuthRequest;
import org.scribe.model.Response;
import org.scribe.model.Token;
import org.scribe.model.Verifier;
import org.scribe.oauth.OAuth20ServiceImpl;
import org.scribe.oauth.OAuthService;

/**
* User: ezgraphs
* Date: 12/27/11
* Time: 11:16 AM
*/
public class OAuth20aServiceImpl extends OAuth20ServiceImpl implements OAuthService {

private final DefaultApi20a api;
private final OAuthConfig config;

/**
* Replicate api and config variables and assignment
* since the superclass declares these private
*
* @param api
* @param config
*/
public OAuth20aServiceImpl(DefaultApi20 api, OAuthConfig config) {
super(api, config);
this.api = (DefaultApi20a) api;
this.config = config;
}

/**
* The method overwritten below was required because parameters are body parameters in the
* Google version of the API. In addition, a body parameter of type grant_type is needed.
*
* {@inheritDoc}
*/
public Token getAccessToken(Token requestToken, Verifier verifier) {
OAuthRequest request = new OAuthRequest(api.getAccessTokenVerb(), api.getAccessTokenEndpoint());

request.addBodyParameter("grant_type", "authorization_code");
request.addBodyParameter(OAuthConstants.CODE, verifier.getValue());
request.addBodyParameter(OAuthConstants.CLIENT_ID, config.getApiKey());
request.addBodyParameter(OAuthConstants.CLIENT_SECRET, config.getApiSecret());
request.addBodyParameter(OAuthConstants.REDIRECT_URI, config.getCallback());
if (config.hasScope()) request.addBodyParameter(OAuthConstants.SCOPE, config.getScope());
Response response = request.send();
String body = response.getBody();
System.out.println("body:\n" + body);
return extract(body);
}

/**
* @param body
*
* @return
*/
private Token extract(String body) {
JsonParser parser = new JsonParser();
JsonElement e = parser.parse(body);

String accessToken = e.getAsJsonObject().get("access_token").getAsString();
String id = e.getAsJsonObject().get("id_token").getAsString();
return new Token(accessToken, id);
}
}