issue #39 企业号添加oauth2的支持

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpConfigStorage.java

@@ -27,6 +27,8 @@ public interface WxCpConfigStorage {
 
   public int getExpiresIn();
 
+  public String getOauth2redirectUri();
+
   public String getHttp_proxy_host();
 
   public int getHttp_proxy_port();

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpInMemoryConfigStorage.java

@@ -18,6 +18,8 @@ public class WxCpInMemoryConfigStorage implements WxCpConfigStorage {
   protected String agentId;
   protected int expiresIn;
 
+  protected String oauth2redirectUri;
+
   protected String http_proxy_host;
   protected int http_proxy_port;
   protected String http_proxy_username;
@@ -88,6 +90,15 @@ public class WxCpInMemoryConfigStorage implements WxCpConfigStorage {
     this.agentId = agentId;
   }
 
+  @Override
+  public String getOauth2redirectUri() {
+    return this.oauth2redirectUri;
+  }
+
+  public void setOauth2redirectUri(String oauth2redirectUri) {
+    this.oauth2redirectUri = oauth2redirectUri;
+  }
+
   public String getHttp_proxy_host() {
     return http_proxy_host;
   }

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpService.java

@@ -274,6 +274,26 @@ public interface WxCpService {
    */
   public void tagAddUsers(String tagId, List<String> userIds) throws WxErrorException;
 
+  /**
+   * <pre>
+   * 构造oauth2授权的url连接
+   * 详情请见: http://qydev.weixin.qq.com/wiki/index.php?title=企业获取code
+   * </pre>
+   * @param state
+   * @return code
+   */
+  public String oauth2buildAuthorizationUrl(String state);
+
+  /**
+   * <pre>
+   * 用oauth2获取用户信息
+   * http://qydev.weixin.qq.com/wiki/index.php?title=根据code获取成员信息
+   * </pre>
+   * @param code
+   * @return [userid, deviceid]
+   */
+  public String[] oauth2getUserInfo(String code) throws WxErrorException;
+
   /**
    * 移除标签成员
    *

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpServiceImpl.java

@@ -316,6 +316,41 @@ public class WxCpServiceImpl implements WxCpService {
     execute(new SimplePostRequestExecutor(), url, jsonObject.toString());
   }
 
+  @Override
+  public String oauth2buildAuthorizationUrl(String state) {
+    String url = "https://open.weixin.qq.com/connect/oauth2/authorize?" ;
+    url += "appid=" + wxCpConfigStorage.getCorpId();
+    url += "&redirect_uri=" + URIUtil.encodeURIComponent(wxCpConfigStorage.getOauth2redirectUri());
+    url += "&response_type=code";
+    url += "&scope=snsapi_base";
+    if (state != null) {
+      url += "&state=" + state;
+    }
+    url += "#wechat_redirect";
+    return url;
+  }
+
+  @Override
+  public String[] oauth2getUserInfo(String code) throws WxErrorException {
+    String url = "https://qyapi.weixin.qq.com/cgi-bin/user/getuserinfo?";
+    url += "access_token=" + wxCpConfigStorage.getAccessToken();
+    url += "&code=" + code;
+    url += "agendid=" + wxCpConfigStorage.getAgentId();
+
+    try {
+      RequestExecutor<String, String> executor = new SimpleGetRequestExecutor();
+      String responseText = executor.execute(getHttpclient(), httpProxy, url, null);
+      JsonElement je = Streams.parse(new JsonReader(new StringReader(responseText)));
+      JsonObject jo = je.getAsJsonObject();
+      return new String[] {GsonHelper.getString(jo, "UserId"), GsonHelper.getString(jo, "DeviceId")};
+    } catch (ClientProtocolException e) {
+      throw new RuntimeException(e);
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+
   public String get(String url, String queryParam) throws WxErrorException {
     return execute(new SimpleGetRequestExecutor(), url, queryParam);
   }