issue #39 添加oauth2的支持

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpConfigStorage.java

@@ -25,6 +25,8 @@ public interface WxMpConfigStorage {
 
   public int getExpiresIn();
 
+  public String getOauth2redirectUrl();
+
   public String getHttp_proxy_host();
 
   public int getHttp_proxy_port();

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpInMemoryConfigStorage.java

@@ -20,6 +20,7 @@ public class WxMpInMemoryConfigStorage implements WxMpConfigStorage {
   protected int http_proxy_port;
   protected String http_proxy_username;
   protected String http_proxy_password;
+  protected String oauth2redirectUrl;
 
   public void updateAccessToken(WxAccessToken accessToken) {
     updateAccessToken(accessToken.getAccessToken(), accessToken.getExpiresIn());
@@ -78,6 +79,15 @@ public class WxMpInMemoryConfigStorage implements WxMpConfigStorage {
     this.expiresIn = expiresIn;
   }
 
+  @Override
+  public String getOauth2redirectUrl() {
+    return this.oauth2redirectUrl;
+  }
+
+  public void setOauth2redirectUrl(String oauth2redirectUrl) {
+    this.oauth2redirectUrl = oauth2redirectUrl;
+  }
+
   public String getHttp_proxy_host() {
     return http_proxy_host;
   }

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpService.java

@@ -329,6 +329,54 @@ public interface WxMpService {
    */
   WxMpSemanticQueryResult semanticQuery(WxMpSemanticQuery semanticQuery) throws WxErrorException;
 
+  /**
+   * <pre>
+   * 构造oauth2授权的url连接
+   * 详情请见: http://mp.weixin.qq.com/wiki/index.php?title=网页授权获取用户基本信息
+   * </pre>
+   * @param scope
+   * @param state
+   * @return code
+   */
+  public String oauth2buildAuthorizationUrl(String scope, String state);
+
+  /**
+   * <pre>
+   * 用code换取oauth2的access token
+   * 详情请见: http://mp.weixin.qq.com/wiki/index.php?title=网页授权获取用户基本信息
+   * </pre>
+   * @param code
+   * @return
+   */
+  public WxMpOAuth2AccessToken oauth2getAccessToken(String code) throws WxErrorException;
+
+  /**
+   * <pre>
+   * 刷新oauth2的access token
+   * </pre>
+   * @param refreshToken
+   * @return
+   */
+  public WxMpOAuth2AccessToken oauth2refreshAccessToken(String refreshToken) throws WxErrorException;
+
+  /**
+   * <pre>
+   * 用oauth2获取用户信息, 当前面引导授权时的scope是snsapi_userinfo的时候才可以
+   * </pre>
+   * @param oAuth2AccessToken
+   * @param lang zh_CN, zh_TW, en
+   */
+  public WxMpUser oauth2getUserInfo(WxMpOAuth2AccessToken oAuth2AccessToken, String lang) throws WxErrorException;
+
+  /**
+   * <pre>
+   * 验证oauth2的access token是否有效
+   * </pre>
+   * @param oAuth2AccessToken
+   * @return
+   */
+  public boolean oauth2validateAccessToken(WxMpOAuth2AccessToken oAuth2AccessToken);
+
   /**
    * 当本Service没有实现某个API的时候，可以用这个，针对所有微信API中的GET请求
    * @param url

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpServiceImpl.java

@@ -27,11 +27,13 @@ import org.apache.http.client.CredentialsProvider;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.utils.URIUtils;
 import org.apache.http.impl.client.BasicCredentialsProvider;
 import org.apache.http.impl.client.BasicResponseHandler;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClients;
 
+import javax.print.DocFlavor;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
@@ -297,6 +299,98 @@ public class WxMpServiceImpl implements WxMpService {
     return WxMpSemanticQueryResult.fromJson(responseContent);
   }
 
+  @Override
+  public String oauth2buildAuthorizationUrl(String scope, String state) {
+    String url = "https://open.weixin.qq.com/connect/oauth2/authorize?" ;
+    url += "appid=" + wxMpConfigStorage.getAppId();
+    url += "&redirect_uri=" + URIUtil.encodeURIComponent(wxMpConfigStorage.getOauth2redirectUrl());
+    url += "&response_type=code";
+    url += "&scope=" + scope;
+    if (state != null) {
+      url += "&state=" + state;
+    }
+    url += "#wechat_redirect";
+    return url;
+  }
+
+  @Override
+  public WxMpOAuth2AccessToken oauth2getAccessToken(String code) throws WxErrorException {
+    String url = "https://api.weixin.qq.com/sns/oauth2/access_token?";
+    url += "appid=" +  wxMpConfigStorage.getAppId();
+    url += "&secret=" + wxMpConfigStorage.getSecret();
+    url += "&code=" + code;
+    url += "&grant_type=authorization_code";
+
+    try {
+      RequestExecutor<String, String> executor = new SimpleGetRequestExecutor();
+      String responseText = executor.execute(getHttpclient(), httpProxy, url, null);
+      return WxMpOAuth2AccessToken.fromJson(responseText);
+    } catch (ClientProtocolException e) {
+      throw new RuntimeException(e);
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  @Override
+  public WxMpOAuth2AccessToken oauth2refreshAccessToken(String refreshToken) throws WxErrorException {
+    String url = "https://api.weixin.qq.com/sns/oauth2/refresh_token?";
+    url += "appid=" + wxMpConfigStorage.getAppId();
+    url += "&grant_type=refresh_token";
+    url += "&refresh_token=" + refreshToken;
+
+    try {
+      RequestExecutor<String, String> executor = new SimpleGetRequestExecutor();
+      String responseText = executor.execute(getHttpclient(), httpProxy, url, null);
+      return WxMpOAuth2AccessToken.fromJson(responseText);
+    } catch (ClientProtocolException e) {
+      throw new RuntimeException(e);
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  @Override
+  public WxMpUser oauth2getUserInfo(WxMpOAuth2AccessToken oAuth2AccessToken, String lang) throws WxErrorException {
+    String url = "https://api.weixin.qq.com/sns/userinfo?";
+    url += "access_token=" + oAuth2AccessToken.getAccessToken();
+    url += "&openid=" + oAuth2AccessToken.getOpenId();
+    if (lang == null) {
+      url += "&lang=zh_CN";
+    } else {
+      url += "&lang=" + lang;
+    }
+
+    try {
+      RequestExecutor<String, String> executor = new SimpleGetRequestExecutor();
+      String responseText = executor.execute(getHttpclient(), httpProxy, url, null);
+      return WxMpUser.fromJson(responseText);
+    } catch (ClientProtocolException e) {
+      throw new RuntimeException(e);
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  @Override
+  public boolean oauth2validateAccessToken(WxMpOAuth2AccessToken oAuth2AccessToken) {
+    String url = "https://api.weixin.qq.com/sns/auth?";
+    url += "access_token=" + oAuth2AccessToken;
+    url += "&openid=" + oAuth2AccessToken.getOpenId();
+
+    try {
+      RequestExecutor<String, String> executor = new SimpleGetRequestExecutor();
+      executor.execute(getHttpclient(), httpProxy, url, null);
+    } catch (ClientProtocolException e) {
+      throw new RuntimeException(e);
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    } catch (WxErrorException e) {
+      return false;
+    }
+    return true;
+  }
+
   public String get(String url, String queryParam) throws WxErrorException {
     return execute(new SimpleGetRequestExecutor(), url, queryParam);
   }

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/bean/result/WxMpOAuth2AccessToken.java

@@ -0,0 +1,64 @@
+package me.chanjar.weixin.mp.bean.result;
+
+import me.chanjar.weixin.common.util.json.WxGsonBuilder;
+
+/**
+ * Created by qianjia on 14/11/26.
+ */
+public class WxMpOAuth2AccessToken {
+
+  private String accessToken;
+
+  private int expiresIn = -1;
+
+  private String refreshToken;
+
+  private String openId;
+
+  private String scope;
+
+  public String getRefreshToken() {
+    return refreshToken;
+  }
+
+  public void setRefreshToken(String refreshToken) {
+    this.refreshToken = refreshToken;
+  }
+
+  public String getOpenId() {
+    return openId;
+  }
+
+  public void setOpenId(String openId) {
+    this.openId = openId;
+  }
+
+  public String getScope() {
+    return scope;
+  }
+
+  public void setScope(String scope) {
+    this.scope = scope;
+  }
+
+  public String getAccessToken() {
+    return accessToken;
+  }
+
+  public void setAccessToken(String accessToken) {
+    this.accessToken = accessToken;
+  }
+
+  public int getExpiresIn() {
+    return expiresIn;
+  }
+
+  public void setExpiresIn(int expiresIn) {
+    this.expiresIn = expiresIn;
+  }
+
+  public static WxMpOAuth2AccessToken fromJson(String json) {
+    return WxGsonBuilder.create().fromJson(json, WxMpOAuth2AccessToken.class);
+  }
+
+}