polish:优化全局错误输出

Author: NICEXAI

client.go

@@ -1,7 +1,6 @@
 package WeChatCustomerServiceSDK
 
 import (
-	"errors"
 	"github.com/NICEXAI/WeChatCustomerServiceSDK/cache"
 	"sync"
 	"time"
@@ -39,7 +38,7 @@ type Client struct {
 // New 初始化微信客服实例
 func New(options Options) (client *Client, err error) {
 	if options.Cache == nil {
-		return nil, errors.New("the cache is nil, please set the cache first")
+		return nil, NewSDKErr(50001)
 	}
 
 	if options.ExpireTime == 0 {

error.go

@@ -1,22 +1,47 @@
 package WeChatCustomerServiceSDK
 
-import "fmt"
+import (
+	"reflect"
+	"strings"
+)
 
 // Error 错误
-type Error struct {
-	ErrCode int `json:"err_code,omitempty"`
-	ErrMsg string `json:"err_msg"`
-}
+type Error string
+
+const (
+	// SDKInitFailed 错误码：50001
+	SDKInitFailed Error			= "SDK初始化失败"
+	// SDKCacheUnavailable 错误码：50002
+	SDKCacheUnavailable	Error	= "缓存无效"
+	// SDKUnknownError 错误码：50003
+	SDKUnknownError Error		= "未知错误"
+	// SDKInvalidCredential 错误码：40001
+	SDKInvalidCredential Error	= "不合法的secret参数"
+	// SDKAccessTokenExpired 错误码：42001
+	SDKAccessTokenExpired Error = "AccessToken 已过期"
+)
 
 //输出错误信息
 func (r Error) Error() string {
-	return fmt.Sprintf("%d:%s", r.ErrCode, r.ErrMsg)
+	return reflect.ValueOf(r).String()
 }
 
 // NewSDKErr 初始化SDK实例错误信息
-func NewSDKErr(code int, msg string) Error {
-	return Error{
-		ErrCode: code,
-		ErrMsg:  msg,
+func NewSDKErr(code int, msgList ...string) Error {
+	switch code {
+	case 50001:
+		return SDKInitFailed
+	case 50002:
+		return SDKCacheUnavailable
+	case 40001:
+		return SDKInvalidCredential
+	case 42001:
+		return SDKAccessTokenExpired
+	default:
+		//返回未知的自定义错误
+		if len(msgList) > 0 {
+			return Error(strings.Join(msgList, ","))
+		}
+		return SDKUnknownError
 	}
 }

token.go

@@ -2,8 +2,7 @@ package WeChatCustomerServiceSDK
 
 import (
 	"encoding/json"
-	"errors"
-	"fmt"
+ 	"fmt"
 	"github.com/NICEXAI/WeChatCustomerServiceSDK/util"
 )
 
@@ -25,6 +24,7 @@ func (r *Client) GetAccessToken() (info AccessTokenSchema, err error) {
 	if err != nil {
 		return info, err
 	}
+	fmt.Println(string(data))
 	_ = json.Unmarshal(data, &info)
 	if info.ErrCode != 0 {
 		return info, NewSDKErr(info.ErrCode, info.ErrMsg)
@@ -50,7 +50,7 @@ func (r *Client) initAccessToken() error {
 	//判断是否已初始化完成，如果己初始化则直接返回当前实例
 	token, err := r.getAccessToken()
 	if err != nil {
-		return errors.New("cache unavailable")
+		return NewSDKErr(50002)
 	}
 	if token == "" {
 		if err = r.RefreshAccessToken(); err != nil {