| // Copyright 2015 go-swagger maintainers |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package runtime |
| |
| import ( |
| "bytes" |
| "encoding" |
| "errors" |
| "fmt" |
| "io" |
| "reflect" |
| |
| "github.com/go-openapi/swag" |
| ) |
| |
| // TextConsumer creates a new text consumer |
| func TextConsumer() Consumer { |
| return ConsumerFunc(func(reader io.Reader, data interface{}) error { |
| if reader == nil { |
| return errors.New("TextConsumer requires a reader") // early exit |
| } |
| |
| buf := new(bytes.Buffer) |
| _, err := buf.ReadFrom(reader) |
| if err != nil { |
| return err |
| } |
| b := buf.Bytes() |
| |
| if tu, ok := data.(encoding.TextUnmarshaler); ok { |
| err := tu.UnmarshalText(b) |
| if err != nil { |
| return fmt.Errorf("text consumer: %v", err) |
| } |
| |
| return nil |
| } |
| |
| t := reflect.TypeOf(data) |
| if data != nil && t.Kind() == reflect.Ptr { |
| v := reflect.Indirect(reflect.ValueOf(data)) |
| if t.Elem().Kind() == reflect.String { |
| v.SetString(string(b)) |
| return nil |
| } |
| } |
| |
| return fmt.Errorf("%v (%T) is not supported by the TextConsumer, %s", |
| data, data, "can be resolved by supporting TextUnmarshaler interface") |
| }) |
| } |
| |
| // TextProducer creates a new text producer |
| func TextProducer() Producer { |
| return ProducerFunc(func(writer io.Writer, data interface{}) error { |
| if writer == nil { |
| return errors.New("TextProducer requires a writer") // early exit |
| } |
| |
| if data == nil { |
| return errors.New("no data given to produce text from") |
| } |
| |
| if tm, ok := data.(encoding.TextMarshaler); ok { |
| txt, err := tm.MarshalText() |
| if err != nil { |
| return fmt.Errorf("text producer: %v", err) |
| } |
| _, err = writer.Write(txt) |
| return err |
| } |
| |
| if str, ok := data.(error); ok { |
| _, err := writer.Write([]byte(str.Error())) |
| return err |
| } |
| |
| if str, ok := data.(fmt.Stringer); ok { |
| _, err := writer.Write([]byte(str.String())) |
| return err |
| } |
| |
| v := reflect.Indirect(reflect.ValueOf(data)) |
| if t := v.Type(); t.Kind() == reflect.Struct || t.Kind() == reflect.Slice { |
| b, err := swag.WriteJSON(data) |
| if err != nil { |
| return err |
| } |
| _, err = writer.Write(b) |
| return err |
| } |
| if v.Kind() != reflect.String { |
| return fmt.Errorf("%T is not a supported type by the TextProducer", data) |
| } |
| |
| _, err := writer.Write([]byte(v.String())) |
| return err |
| }) |
| } |