diff --git a/src/main/java/me/zhyd/oauth/request/AuthDingTalkRequest.java b/src/main/java/me/zhyd/oauth/request/AuthDingTalkRequest.java
index 8ba56c3f7fe68877c542fc512c5d1edf9a8ed18e..06c25e788e582d09d28afc5b29ec51c1ea7964f6 100644
--- a/src/main/java/me/zhyd/oauth/request/AuthDingTalkRequest.java
+++ b/src/main/java/me/zhyd/oauth/request/AuthDingTalkRequest.java
@@ -9,7 +9,7 @@ import me.zhyd.oauth.model.AuthDingTalkErrorCode;
 import me.zhyd.oauth.model.AuthResponse;
 import me.zhyd.oauth.model.AuthSource;
 import me.zhyd.oauth.model.AuthUser;
-import me.zhyd.oauth.utils.DingTalkSignatureUtil;
+import me.zhyd.oauth.utils.GlobalAuthUtil;
 import me.zhyd.oauth.utils.UrlBuilder;
 
 import java.util.Objects;
@@ -31,7 +31,7 @@ public class AuthDingTalkRequest extends BaseAuthRequest {
     protected AuthUser getUserInfo(String code) {
         // 根据timestamp, appSecret计算签名值
         String stringToSign = System.currentTimeMillis() + "";
-        String urlEncodeSignature = DingTalkSignatureUtil.computeSignature(config.getClientSecret(), stringToSign);
+        String urlEncodeSignature = GlobalAuthUtil.generateDingTalkSignature(config.getClientSecret(), stringToSign);
         HttpResponse response = HttpRequest.post(UrlBuilder.getDingTalkUserInfoUrl(urlEncodeSignature, stringToSign, config.getClientId()))
                 .body(Objects.requireNonNull(new JSONObject().put("tmp_auth_code", code)))
                 .execute();
diff --git a/src/main/java/me/zhyd/oauth/request/AuthGithubRequest.java b/src/main/java/me/zhyd/oauth/request/AuthGithubRequest.java
index 2c2f096841a2c9d1909a56e753ebefe98e5f4bbc..ac7fca719acffd82d7a5fa90a612f8d834f2b0bd 100644
--- a/src/main/java/me/zhyd/oauth/request/AuthGithubRequest.java
+++ b/src/main/java/me/zhyd/oauth/request/AuthGithubRequest.java
@@ -4,10 +4,14 @@ import cn.hutool.http.HttpRequest;
 import cn.hutool.http.HttpResponse;
 import com.alibaba.fastjson.JSONObject;
 import me.zhyd.oauth.config.AuthConfig;
+import me.zhyd.oauth.exception.AuthException;
 import me.zhyd.oauth.model.AuthSource;
 import me.zhyd.oauth.model.AuthUser;
+import me.zhyd.oauth.utils.GlobalAuthUtil;
 import me.zhyd.oauth.utils.UrlBuilder;
 
+import java.util.Map;
+
 /**
  * @author yadong.zhang (yadong.zhang0415(a)gmail.com)
  * @version 1.0
@@ -25,8 +29,11 @@ public class AuthGithubRequest extends BaseAuthRequest {
     protected String getAccessToken(String code) {
         String accessTokenUrl = UrlBuilder.getGithubAccessTokenUrl(config.getClientId(), config.getClientSecret(), code, config.getRedirectUri());
         HttpResponse response = HttpRequest.post(accessTokenUrl).execute();
-        String accessTokenStr = response.body();
-        return accessTokenStr.split("&")[0];
+        Map<String, String> res = GlobalAuthUtil.parseStringToMap(response.body());
+        if (res.containsKey("error")) {
+            throw new AuthException(res.get("error") + ":" + res.get("error_description"));
+        }
+        return res.get("access_token");
     }
 
     @Override
diff --git a/src/main/java/me/zhyd/oauth/utils/DingTalkSignatureUtil.java b/src/main/java/me/zhyd/oauth/utils/GlobalAuthUtil.java
similarity index 54%
rename from src/main/java/me/zhyd/oauth/utils/DingTalkSignatureUtil.java
rename to src/main/java/me/zhyd/oauth/utils/GlobalAuthUtil.java
index 0ae35ebe58e8a803a9053d7c215aa7a37fe41fa7..dc12a657e2a63daba8bf44fcd38f1c47b00ac1fb 100644
--- a/src/main/java/me/zhyd/oauth/utils/DingTalkSignatureUtil.java
+++ b/src/main/java/me/zhyd/oauth/utils/GlobalAuthUtil.java
@@ -6,28 +6,27 @@ import me.zhyd.oauth.exception.AuthException;
 import javax.crypto.Mac;
 import javax.crypto.spec.SecretKeySpec;
 import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
 import java.net.URLEncoder;
 import java.security.InvalidKeyException;
 import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
 
-public class DingTalkSignatureUtil {
-    /* The default encoding. */
+public class GlobalAuthUtil {
     private static final String DEFAULT_ENCODING = "UTF-8";
-
-    /* Signature method. */
     private static final String ALGORITHM = "HmacSHA256";
 
-    public static String computeSignature(String canonicalString, String secret) {
+    public static String generateDingTalkSignature(String canonicalString, String secret) {
         try {
             byte[] signData = sign(canonicalString.getBytes(DEFAULT_ENCODING), secret.getBytes(DEFAULT_ENCODING));
-            return urlEncode(new String(Base64.encode(signData, false)), DEFAULT_ENCODING);
+            return urlEncode(new String(Base64.encode(signData, false)));
         } catch (UnsupportedEncodingException ex) {
             throw new AuthException("Unsupported algorithm: " + DEFAULT_ENCODING, ex);
         }
     }
 
-
     private static byte[] sign(byte[] key, byte[] data) {
         try {
             Mac mac = Mac.getInstance(ALGORITHM);
@@ -40,20 +39,42 @@ public class DingTalkSignatureUtil {
         }
     }
 
-    /**
-     * Encode a URL segment with special chars replaced.
-     */
-    private static String urlEncode(String value, String encoding) {
+    private static String urlEncode(String value) {
         if (value == null) {
             return "";
         }
 
         try {
-            String encoded = URLEncoder.encode(value, encoding);
+            String encoded = URLEncoder.encode(value, GlobalAuthUtil.DEFAULT_ENCODING);
             return encoded.replace("+", "%20").replace("*", "%2A")
                     .replace("~", "%7E").replace("/", "%2F");
         } catch (UnsupportedEncodingException e) {
-            throw new AuthException("FailedToEncodeUri", e);
+            throw new AuthException("Failed To Encode Uri", e);
+        }
+    }
+
+    public static String urlDecode(String value) {
+        if (value == null) {
+            return "";
+        }
+        try {
+            return URLDecoder.decode(value, GlobalAuthUtil.DEFAULT_ENCODING);
+        } catch (UnsupportedEncodingException e) {
+            throw new AuthException("Failed To Decode Uri", e);
+        }
+    }
+
+    public static Map<String, String> parseStringToMap(String accessTokenStr) {
+        Map<String, String> res = new HashMap<>();
+        if (accessTokenStr.contains("&")) {
+            String[] fields = accessTokenStr.split("&");
+            for (String field : fields) {
+                if (field.contains("=")) {
+                    String[] keyValue = field.split("=");
+                    res.put(GlobalAuthUtil.urlDecode(keyValue[0]), keyValue.length == 2 ? GlobalAuthUtil.urlDecode(keyValue[1]) : null);
+                }
+            }
         }
+        return res;
     }
 }
diff --git a/src/main/java/me/zhyd/oauth/utils/UrlBuilder.java b/src/main/java/me/zhyd/oauth/utils/UrlBuilder.java
index fbae8c3000b3f01e2b7ad121f33b4d0c88befdfe..dea7f4ff52c637ef8260b4659f9a90c55372e69b 100644
--- a/src/main/java/me/zhyd/oauth/utils/UrlBuilder.java
+++ b/src/main/java/me/zhyd/oauth/utils/UrlBuilder.java
@@ -16,7 +16,7 @@ import java.text.MessageFormat;
 public class UrlBuilder {
 
     private static final String GITHUB_ACCESS_TOKEN_PATTERN = "{0}?client_id={1}&client_secret={2}&code={3}&redirect_uri={4}";
-    private static final String GITHUB_USER_INFO_PATTERN = "{0}?{1}";
+    private static final String GITHUB_USER_INFO_PATTERN = "{0}?access_token={1}";
     private static final String GITHUB_AUTHORIZE_PATTERN = "{0}?client_id={1}&state=1&redirect_uri={2}";
 
     private static final String WEIBO_ACCESS_TOKEN_PATTERN = "{0}?client_id={1}&client_secret={2}&grant_type=authorization_code&code={3}&redirect_uri={4}";