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Beego/context/param/conv.go
Ming Deng 650fde66aa Revert "Merge pull request #4254 from astaxie/develop-2.0"
This reverts commit e284b0ddae, reversing
changes made to 8ef8fd2606.
2020-11-26 17:48:29 +08:00

79 lines
2.1 KiB
Go

package param
import (
"fmt"
"reflect"
beecontext "github.com/astaxie/beego/context"
"github.com/astaxie/beego/logs"
)
// ConvertParams converts http method params to values that will be passed to the method controller as arguments
func ConvertParams(methodParams []*MethodParam, methodType reflect.Type, ctx *beecontext.Context) (result []reflect.Value) {
result = make([]reflect.Value, 0, len(methodParams))
for i := 0; i < len(methodParams); i++ {
reflectValue := convertParam(methodParams[i], methodType.In(i), ctx)
result = append(result, reflectValue)
}
return
}
func convertParam(param *MethodParam, paramType reflect.Type, ctx *beecontext.Context) (result reflect.Value) {
paramValue := getParamValue(param, ctx)
if paramValue == "" {
if param.required {
ctx.Abort(400, fmt.Sprintf("Missing parameter %s", param.name))
} else {
paramValue = param.defaultValue
}
}
reflectValue, err := parseValue(param, paramValue, paramType)
if err != nil {
logs.Debug(fmt.Sprintf("Error converting param %s to type %s. Value: %v, Error: %s", param.name, paramType, paramValue, err))
ctx.Abort(400, fmt.Sprintf("Invalid parameter %s. Can not convert %v to type %s", param.name, paramValue, paramType))
}
return reflectValue
}
func getParamValue(param *MethodParam, ctx *beecontext.Context) string {
switch param.in {
case body:
return string(ctx.Input.RequestBody)
case header:
return ctx.Input.Header(param.name)
case path:
return ctx.Input.Query(":" + param.name)
default:
return ctx.Input.Query(param.name)
}
}
func parseValue(param *MethodParam, paramValue string, paramType reflect.Type) (result reflect.Value, err error) {
if paramValue == "" {
return reflect.Zero(paramType), nil
}
parser := getParser(param, paramType)
value, err := parser.parse(paramValue, paramType)
if err != nil {
return result, err
}
return safeConvert(reflect.ValueOf(value), paramType)
}
func safeConvert(value reflect.Value, t reflect.Type) (result reflect.Value, err error) {
defer func() {
if r := recover(); r != nil {
var ok bool
err, ok = r.(error)
if !ok {
err = fmt.Errorf("%v", r)
}
}
}()
result = value.Convert(t)
return
}