Add CSV Support

Signed-off-by: Hiroki Sakamoto <taisho6339@gmail.com>

Author: taisho6339

client/runtime.go

@@ -207,13 +207,15 @@ func New(host, basePath string, schemes []string) *Runtime {
 		runtime.XMLMime:     runtime.XMLConsumer(),
 		runtime.TextMime:    runtime.TextConsumer(),
 		runtime.HTMLMime:    runtime.TextConsumer(),
+		runtime.CSVMime:     runtime.CSVConsumer(),
 		runtime.DefaultMime: runtime.ByteStreamConsumer(),
 	}
 	rt.Producers = map[string]runtime.Producer{
 		runtime.JSONMime:    runtime.JSONProducer(),
 		runtime.XMLMime:     runtime.XMLProducer(),
 		runtime.TextMime:    runtime.TextProducer(),
 		runtime.HTMLMime:    runtime.TextProducer(),
+		runtime.CSVMime:     runtime.CSVProducer(),
 		runtime.DefaultMime: runtime.ByteStreamProducer(),
 	}
 	rt.Transport = http.DefaultTransport

client/runtime_test.go

@@ -39,7 +39,6 @@ import (
 
 // task This describes a task. Tasks require a content property to be set.
 type task struct {
-
 	// Completed
 	Completed bool `json:"completed" xml:"completed"`
 
@@ -366,6 +365,50 @@ func TestRuntime_TextCanary(t *testing.T) {
 	}
 }
 
+func TestRuntime_CSVCanary(t *testing.T) {
+	// test that it can make a simple csv request
+	// and get the response for it.
+	result := `task,content,result
+1,task1,ok
+2,task2,fail
+`
+	server := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		rw.Header().Add(runtime.HeaderContentType, runtime.CSVMime)
+		rw.WriteHeader(http.StatusOK)
+		_, _ = rw.Write([]byte(result))
+	}))
+	defer server.Close()
+
+	rwrtr := runtime.ClientRequestWriterFunc(func(req runtime.ClientRequest, _ strfmt.Registry) error {
+		return nil
+	})
+
+	hu, _ := url.Parse(server.URL)
+	rt := New(hu.Host, "/", []string{"http"})
+	res, err := rt.Submit(&runtime.ClientOperation{
+		ID:          "getTasks",
+		Method:      "GET",
+		PathPattern: "/",
+		Params:      rwrtr,
+		Reader: runtime.ClientResponseReaderFunc(func(response runtime.ClientResponse, consumer runtime.Consumer) (interface{}, error) {
+			if response.Code() == 200 {
+				var result bytes.Buffer
+				if err := consumer.Consume(response.Body(), &result); err != nil {
+					return nil, err
+				}
+				return result, nil
+			}
+			return nil, errors.New("Generic error")
+		}),
+	})
+
+	if assert.NoError(t, err) {
+		assert.IsType(t, bytes.Buffer{}, res)
+		actual := res.(bytes.Buffer)
+		assert.EqualValues(t, result, actual.String())
+	}
+}
+
 type roundTripperFunc func(*http.Request) (*http.Response, error)
 
 func (fn roundTripperFunc) RoundTrip(req *http.Request) (*http.Response, error) {

constants.go

@@ -38,6 +38,8 @@ const (
 	TextMime = "text/plain"
 	// HTMLMime the html mime type
 	HTMLMime = "text/html"
+	// CSVMime the csv mime type
+	CSVMime = "text/csv"
 	// MultipartFormMime the multipart form mime type
 	MultipartFormMime = "multipart/form-data"
 	// URLencodedFormMime the url encoded form mime type

csv.go

@@ -0,0 +1,77 @@
+// 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/csv"
+	"errors"
+	"io"
+)
+
+// CSVConsumer creates a new CSV consumer
+func CSVConsumer() Consumer {
+	return ConsumerFunc(func(reader io.Reader, data interface{}) error {
+		if reader == nil {
+			return errors.New("CSVConsumer requires a reader")
+		}
+
+		csvReader := csv.NewReader(reader)
+		writer, ok := data.(io.Writer)
+		if !ok {
+			return errors.New("data type must be io.Writer")
+		}
+		csvWriter := csv.NewWriter(writer)
+		records, err := csvReader.ReadAll()
+		if err != nil {
+			return err
+		}
+		for _, r := range records {
+			if err := csvWriter.Write(r); err != nil {
+				return err
+			}
+		}
+		csvWriter.Flush()
+		return nil
+	})
+}
+
+// CSVProducer creates a new CSV producer
+func CSVProducer() Producer {
+	return ProducerFunc(func(writer io.Writer, data interface{}) error {
+		if writer == nil {
+			return errors.New("CSVProducer requires a writer")
+		}
+
+		dataBytes, ok := data.([]byte)
+		if !ok {
+			return errors.New("data type must be byte array")
+		}
+
+		csvReader := csv.NewReader(bytes.NewBuffer(dataBytes))
+		records, err := csvReader.ReadAll()
+		if err != nil {
+			return err
+		}
+		csvWriter := csv.NewWriter(writer)
+		for _, r := range records {
+			if err := csvWriter.Write(r); err != nil {
+				return err
+			}
+		}
+		csvWriter.Flush()
+		return nil
+	})
+}

csv_test.go

@@ -0,0 +1,73 @@
+// 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"
+	"github.com/stretchr/testify/assert"
+	"io"
+	"net/http/httptest"
+	"testing"
+)
+
+const consProdCSV = `name,country,age
+John,US,19
+Mike,US,20
+`
+
+type csvEmptyReader struct{}
+
+func (r *csvEmptyReader) Read(d []byte) (int, error) {
+	return 0, io.EOF
+}
+
+func TestCSVConsumer(t *testing.T) {
+	cons := CSVConsumer()
+	reader := bytes.NewBuffer([]byte(consProdCSV))
+
+	outBuf := new(bytes.Buffer)
+	err := cons.Consume(reader, outBuf)
+	assert.NoError(t, err)
+	assert.Equal(t, consProdCSV, outBuf.String())
+
+	outBuf2 := new(bytes.Buffer)
+	err = cons.Consume(nil, outBuf2)
+	assert.Error(t, err)
+
+	err = cons.Consume(reader, struct{}{})
+	assert.Error(t, err)
+
+	emptyOutBuf := new(bytes.Buffer)
+	err = cons.Consume(&csvEmptyReader{}, emptyOutBuf)
+	assert.NoError(t, err)
+	assert.Equal(t, "", emptyOutBuf.String())
+}
+
+func TestCSVProducer(t *testing.T) {
+	prod := CSVProducer()
+	data := []byte(consProdCSV)
+
+	rw := httptest.NewRecorder()
+	err := prod.Produce(rw, data)
+	assert.NoError(t, err)
+	assert.Equal(t, consProdCSV, rw.Body.String())
+
+	rw2 := httptest.NewRecorder()
+	err = prod.Produce(rw2, struct{}{})
+	assert.Error(t, err)
+
+	err = prod.Produce(nil, data)
+	assert.Error(t, err)
+}