fix(server): output detailed error message

Resolved #8.

server/database/database.go

@@ -1,6 +1,8 @@
 package database
 
-import "context"
+import (
+	"context"
+)
 
 type Database interface {
 	QueryByQQNumber(ctx context.Context, qqNumber int64) ([]Model, error)

server/main/main.go

@@ -10,7 +10,7 @@ var configPath string
 
 func init() {
 	flag.StringVar(&configPath, "config", "../config.yaml", "config file path")
-  flag.Parse()
+	flag.Parse()
 }
 
 func main() {

server/service/errors.go

@@ -9,14 +9,14 @@ import (
 
 var (
 	OK                    = errors.New("ok")
-	UnknownError          = errors.New("unknown error")
 	InvalidParameterError = errors.New("invalid parameter error")
+	QueryFailedError      = errors.New("query failed error")
 )
 
 var errorMap = map[error]int{
 	OK:                    0,
-	UnknownError:          10001,
-	InvalidParameterError: 10002,
+	InvalidParameterError: 10001,
+	QueryFailedError:      10002,
 }
 
 type Response struct {
@@ -31,8 +31,7 @@ func NewResponse(ctx echo.Context, err error, data interface{}) error {
 	}
 	code, ok := errorMap[err]
 	if !ok {
-		err = UnknownError
-		code = errorMap[err]
+		code = 10000
 	}
 	return ctx.JSONPretty(http.StatusOK, &Response{
 		Code:    code,

server/service/service.go

@@ -37,7 +37,7 @@ func NewService(configPath string) *Service {
 func (svc *Service) loadRouter() {
 	instance := svc.instance
 	instance.HTTPErrorHandler = func(err error, ctx echo.Context) {
-		_ = NewResponse(ctx, UnknownError, err)
+		_ = NewResponse(ctx, err, nil)
 	}
 	instance.Static("/", "../website/build")
 	apiGroup := instance.Group("/api")