package param import ( "fmt" "reflect" beecontext "github.com/astaxie/beego/pkg/context" "github.com/astaxie/beego/pkg/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 }