feat(binding): Support custom BindUnmarshaler for binding. (#3933)

This commit is contained in:
dkkb
2024-05-07 09:43:15 +08:00
committed by GitHub
parent b4f66e965b
commit a18219566c
4 changed files with 184 additions and 0 deletions

View File

@ -165,6 +165,23 @@ func tryToSetValue(value reflect.Value, field reflect.StructField, setter setter
return setter.TrySet(value, field, tagValue, setOpt)
}
// BindUnmarshaler is the interface used to wrap the UnmarshalParam method.
type BindUnmarshaler interface {
// UnmarshalParam decodes and assigns a value from an form or query param.
UnmarshalParam(param string) error
}
// trySetCustom tries to set a custom type value
// If the value implements the BindUnmarshaler interface, it will be used to set the value, we will return `true`
// to skip the default value setting.
func trySetCustom(val string, value reflect.Value) (isSet bool, err error) {
switch v := value.Addr().Interface().(type) {
case BindUnmarshaler:
return true, v.UnmarshalParam(val)
}
return false, nil
}
func setByForm(value reflect.Value, field reflect.StructField, form map[string][]string, tagValue string, opt setOptions) (isSet bool, err error) {
vs, ok := form[tagValue]
if !ok && !opt.isDefaultExists {
@ -194,6 +211,9 @@ func setByForm(value reflect.Value, field reflect.StructField, form map[string][
if len(vs) > 0 {
val = vs[0]
}
if ok, err := trySetCustom(val, value); ok {
return ok, err
}
return true, setWithProperType(val, value, field)
}
}

View File

@ -5,8 +5,11 @@
package binding
import (
"fmt"
"mime/multipart"
"reflect"
"strconv"
"strings"
"testing"
"time"
@ -323,3 +326,99 @@ func TestMappingIgnoredCircularRef(t *testing.T) {
err := mappingByPtr(&s, formSource{}, "form")
assert.NoError(t, err)
}
type customUnmarshalParamHex int
func (f *customUnmarshalParamHex) UnmarshalParam(param string) error {
v, err := strconv.ParseInt(param, 16, 64)
if err != nil {
return err
}
*f = customUnmarshalParamHex(v)
return nil
}
func TestMappingCustomUnmarshalParamHexWithFormTag(t *testing.T) {
var s struct {
Foo customUnmarshalParamHex `form:"foo"`
}
err := mappingByPtr(&s, formSource{"foo": {`f5`}}, "form")
assert.NoError(t, err)
assert.EqualValues(t, 245, s.Foo)
}
func TestMappingCustomUnmarshalParamHexWithURITag(t *testing.T) {
var s struct {
Foo customUnmarshalParamHex `uri:"foo"`
}
err := mappingByPtr(&s, formSource{"foo": {`f5`}}, "uri")
assert.NoError(t, err)
assert.EqualValues(t, 245, s.Foo)
}
type customUnmarshalParamType struct {
Protocol string
Path string
Name string
}
func (f *customUnmarshalParamType) UnmarshalParam(param string) error {
parts := strings.Split(param, ":")
if len(parts) != 3 {
return fmt.Errorf("invalid format")
}
f.Protocol = parts[0]
f.Path = parts[1]
f.Name = parts[2]
return nil
}
func TestMappingCustomStructTypeWithFormTag(t *testing.T) {
var s struct {
FileData customUnmarshalParamType `form:"data"`
}
err := mappingByPtr(&s, formSource{"data": {`file:/foo:happiness`}}, "form")
assert.NoError(t, err)
assert.EqualValues(t, "file", s.FileData.Protocol)
assert.EqualValues(t, "/foo", s.FileData.Path)
assert.EqualValues(t, "happiness", s.FileData.Name)
}
func TestMappingCustomStructTypeWithURITag(t *testing.T) {
var s struct {
FileData customUnmarshalParamType `uri:"data"`
}
err := mappingByPtr(&s, formSource{"data": {`file:/foo:happiness`}}, "uri")
assert.NoError(t, err)
assert.EqualValues(t, "file", s.FileData.Protocol)
assert.EqualValues(t, "/foo", s.FileData.Path)
assert.EqualValues(t, "happiness", s.FileData.Name)
}
func TestMappingCustomPointerStructTypeWithFormTag(t *testing.T) {
var s struct {
FileData *customUnmarshalParamType `form:"data"`
}
err := mappingByPtr(&s, formSource{"data": {`file:/foo:happiness`}}, "form")
assert.NoError(t, err)
assert.EqualValues(t, "file", s.FileData.Protocol)
assert.EqualValues(t, "/foo", s.FileData.Path)
assert.EqualValues(t, "happiness", s.FileData.Name)
}
func TestMappingCustomPointerStructTypeWithURITag(t *testing.T) {
var s struct {
FileData *customUnmarshalParamType `uri:"data"`
}
err := mappingByPtr(&s, formSource{"data": {`file:/foo:happiness`}}, "uri")
assert.NoError(t, err)
assert.EqualValues(t, "file", s.FileData.Protocol)
assert.EqualValues(t, "/foo", s.FileData.Path)
assert.EqualValues(t, "happiness", s.FileData.Name)
}