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