diff options
Diffstat (limited to 'vendor/github.com/go-openapi/runtime/text.go')
-rw-r--r-- | vendor/github.com/go-openapi/runtime/text.go | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/vendor/github.com/go-openapi/runtime/text.go b/vendor/github.com/go-openapi/runtime/text.go new file mode 100644 index 000000000..f33320b7d --- /dev/null +++ b/vendor/github.com/go-openapi/runtime/text.go @@ -0,0 +1,116 @@ +// 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 the buffer is empty, no need to unmarshal it, which causes a panic. + if len(b) == 0 { + return nil + } + + 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 + }) +} |