goccy/go-json

Author: acidlemon

webapp/go/go.mod

@@ -14,6 +14,7 @@ require (
 )
 
 require (
+	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
 	github.com/gorilla/context v1.1.1 // indirect
 	github.com/gorilla/securecookie v1.1.2 // indirect

webapp/go/go.sum

@@ -4,6 +4,8 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=
 github.com/go-sql-driver/mysql v1.7.1/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
+github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
+github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/golang-jwt/jwt v3.2.2+incompatible h1:IfV12K8xAKAnZqdXVzCZ+TOjboZ2keLg81eXfW3O+oY=
 github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=

webapp/go/main.go

@@ -16,6 +16,7 @@ import (
 	"github.com/jmoiron/sqlx"
 	"github.com/labstack/echo/v4"
 
+	"github.com/goccy/go-json"
 	"github.com/gorilla/sessions"
 	"github.com/labstack/echo-contrib/session"
 	echolog "github.com/labstack/gommon/log"
@@ -118,6 +119,23 @@ func initializeHandler(c echo.Context) error {
 	})
 }
 
+type JSONSerializer struct{}
+
+func (j *JSONSerializer) Serialize(c echo.Context, i interface{}, indent string) error {
+	enc := json.NewEncoder(c.Response())
+	return enc.Encode(i)
+}
+
+func (j *JSONSerializer) Deserialize(c echo.Context, i interface{}) error {
+	err := json.NewDecoder(c.Request().Body).Decode(i)
+	if ute, ok := err.(*json.UnmarshalTypeError); ok {
+		return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Unmarshal type error: expected=%v, got=%v, field=%v, offset=%v", ute.Type, ute.Value, ute.Field, ute.Offset)).SetInternal(err)
+	} else if se, ok := err.(*json.SyntaxError); ok {
+		return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Syntax error: offset=%v, error=%v", se.Offset, se.Error())).SetInternal(err)
+	}
+	return err
+}
+
 func main() {
 	e := echo.New()
 	e.Debug = true
@@ -128,6 +146,8 @@ func main() {
 	e.Use(session.Middleware(cookieStore))
 	// e.Use(middleware.Recover())
 
+	e.JSONSerializer = &JSONSerializer{}
+
 	// 初期化
 	e.POST("/api/initialize", initializeHandler)