forked from mirror/gin
141 lines
3.4 KiB
Go
141 lines
3.4 KiB
Go
// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
|
|
// Use of this source code is governed by a MIT style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package binding
|
|
|
|
import (
|
|
"errors"
|
|
"reflect"
|
|
"strconv"
|
|
)
|
|
|
|
func mapForm(ptr interface{}, form map[string][]string) error {
|
|
typ := reflect.TypeOf(ptr).Elem()
|
|
val := reflect.ValueOf(ptr).Elem()
|
|
for i := 0; i < typ.NumField(); i++ {
|
|
typeField := typ.Field(i)
|
|
structField := val.Field(i)
|
|
if !structField.CanSet() {
|
|
continue
|
|
}
|
|
|
|
inputFieldName := typeField.Tag.Get("form")
|
|
if inputFieldName == "" {
|
|
inputFieldName = typeField.Name
|
|
}
|
|
inputValue, exists := form[inputFieldName]
|
|
|
|
if !exists {
|
|
continue
|
|
}
|
|
|
|
numElems := len(inputValue)
|
|
if structField.Kind() == reflect.Slice && numElems > 0 {
|
|
sliceOf := structField.Type().Elem().Kind()
|
|
slice := reflect.MakeSlice(structField.Type(), numElems, numElems)
|
|
for i := 0; i < numElems; i++ {
|
|
if err := setWithProperType(sliceOf, inputValue[i], slice.Index(i)); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
val.Field(i).Set(slice)
|
|
} else {
|
|
if err := setWithProperType(typeField.Type.Kind(), inputValue[0], structField); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func setWithProperType(valueKind reflect.Kind, val string, structField reflect.Value) error {
|
|
switch valueKind {
|
|
case reflect.Int:
|
|
return setIntField(val, 0, structField)
|
|
case reflect.Int8:
|
|
return setIntField(val, 8, structField)
|
|
case reflect.Int16:
|
|
return setIntField(val, 16, structField)
|
|
case reflect.Int32:
|
|
return setIntField(val, 32, structField)
|
|
case reflect.Int64:
|
|
return setIntField(val, 64, structField)
|
|
case reflect.Uint:
|
|
return setUintField(val, 0, structField)
|
|
case reflect.Uint8:
|
|
return setUintField(val, 8, structField)
|
|
case reflect.Uint16:
|
|
return setUintField(val, 16, structField)
|
|
case reflect.Uint32:
|
|
return setUintField(val, 32, structField)
|
|
case reflect.Uint64:
|
|
return setUintField(val, 64, structField)
|
|
case reflect.Bool:
|
|
return setBoolField(val, structField)
|
|
case reflect.Float32:
|
|
return setFloatField(val, 32, structField)
|
|
case reflect.Float64:
|
|
return setFloatField(val, 64, structField)
|
|
case reflect.String:
|
|
structField.SetString(val)
|
|
default:
|
|
return errors.New("Unknown type")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func setIntField(val string, bitSize int, field reflect.Value) error {
|
|
if val == "" {
|
|
val = "0"
|
|
}
|
|
intVal, err := strconv.ParseInt(val, 10, bitSize)
|
|
if err == nil {
|
|
field.SetInt(intVal)
|
|
}
|
|
return err
|
|
}
|
|
|
|
func setUintField(val string, bitSize int, field reflect.Value) error {
|
|
if val == "" {
|
|
val = "0"
|
|
}
|
|
uintVal, err := strconv.ParseUint(val, 10, bitSize)
|
|
if err == nil {
|
|
field.SetUint(uintVal)
|
|
}
|
|
return err
|
|
}
|
|
|
|
func setBoolField(val string, field reflect.Value) error {
|
|
if val == "" {
|
|
val = "false"
|
|
}
|
|
boolVal, err := strconv.ParseBool(val)
|
|
if err == nil {
|
|
field.SetBool(boolVal)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func setFloatField(val string, bitSize int, field reflect.Value) error {
|
|
if val == "" {
|
|
val = "0.0"
|
|
}
|
|
floatVal, err := strconv.ParseFloat(val, bitSize)
|
|
if err == nil {
|
|
field.SetFloat(floatVal)
|
|
}
|
|
return err
|
|
}
|
|
|
|
// Don't pass in pointers to bind to. Can lead to bugs. See:
|
|
// https://github.com/codegangsta/martini-contrib/issues/40
|
|
// https://github.com/codegangsta/martini-contrib/pull/34#issuecomment-29683659
|
|
func ensureNotPointer(obj interface{}) {
|
|
if reflect.TypeOf(obj).Kind() == reflect.Ptr {
|
|
panic("Pointers are not accepted as binding models")
|
|
}
|
|
}
|