Added XML encoding/decoding API.

Signed-off-by: Vishal Rana <vr@labstack.com>

README.md

@@ -24,8 +24,9 @@ A fast and unfancy micro web framework for Golang.
 - Handy functions to send variety of HTTP response:
     - HTML
     - HTML via templates
-    - JSON
     - String 
+    - JSON
+    - XML
     - NoContent
     - Redirect
     - Error

context.go

@@ -2,6 +2,7 @@ package echo
 
 import (
 	"encoding/json"
+	"encoding/xml"
 	"net/http"
 
 	"fmt"
@@ -111,7 +112,6 @@ func (c *Context) Render(code int, name string, data interface{}) (err error) {
 	c.response.Header().Set(ContentType, TextHTML)
 	c.response.WriteHeader(code)
 	if err = c.echo.renderer.Render(c.response, name, data); err != nil {
-		println(err.Error())
 		c.response.clear()
 	}
 	return
@@ -128,6 +128,17 @@ func (c *Context) HTML(code int, format string, a ...interface{}) (err error) {
 	return
 }
 
+// String formats according to a format specifier and sends text/plain response
+// with status code.
+func (c *Context) String(code int, format string, a ...interface{}) (err error) {
+	c.response.Header().Set(ContentType, TextPlain)
+	c.response.WriteHeader(code)
+	if _, err = fmt.Fprintf(c.response, format, a...); err != nil {
+		c.response.clear()
+	}
+	return
+}
+
 // JSON sends an application/json response with status code.
 func (c *Context) JSON(code int, i interface{}) (err error) {
 	c.response.Header().Set(ContentType, ApplicationJSON)
@@ -138,12 +149,12 @@ func (c *Context) JSON(code int, i interface{}) (err error) {
 	return
 }
 
-// String formats according to a format specifier and sends text/plain response
-// with status code.
-func (c *Context) String(code int, format string, a ...interface{}) (err error) {
-	c.response.Header().Set(ContentType, TextPlain)
+// XML sends an application/xml response with status code.
+func (c *Context) XML(code int, i interface{}) (err error) {
+	c.response.Header().Set(ContentType, ApplicationXML)
 	c.response.WriteHeader(code)
-	if _, err = fmt.Fprintf(c.response, format, a...); err != nil {
+	c.response.Write([]byte(xml.Header))
+	if err = xml.NewEncoder(c.response).Encode(i); err != nil {
 		c.response.clear()
 	}
 	return

context_test.go

@@ -10,6 +10,7 @@ import (
 
 	"strings"
 
+	"encoding/xml"
 	"github.com/stretchr/testify/assert"
 	"net/url"
 )
@@ -25,8 +26,10 @@ func (t *Template) Render(w io.Writer, name string, data interface{}) error {
 }
 
 func TestContext(t *testing.T) {
-	usr := `{"id":"1","name":"Joe"}`
-	req, _ := http.NewRequest(POST, "/", strings.NewReader(usr))
+	userJSON := `{"id":"1","name":"Joe"}`
+	userXML := `<user><id>1</id><name>Joe</name></user>`
+
+	req, _ := http.NewRequest(POST, "/", strings.NewReader(userJSON))
 	rec := httptest.NewRecorder()
 	c := NewContext(req, NewResponse(rec), New())
 
@@ -58,17 +61,12 @@ func TestContext(t *testing.T) {
 	// JSON
 	testBind(t, c, ApplicationJSON)
 
-	// TODO: Form
-	c.request.Header.Set(ContentType, ApplicationForm)
-	u := new(user)
-	err := c.Bind(u)
-	assert.NoError(t, err)
+	// XML
+	c.request, _ = http.NewRequest(POST, "/", strings.NewReader(userXML))
+	testBind(t, c, ApplicationXML)
 
 	// Unsupported
-	c.request.Header.Set(ContentType, "")
-	u = new(user)
-	err = c.Bind(u)
-	assert.Error(t, err)
+	testBind(t, c, "")
 
 	//--------
 	// Render
@@ -78,7 +76,7 @@ func TestContext(t *testing.T) {
 		templates: template.Must(template.New("hello").Parse("Hello, {{.}}!")),
 	}
 	c.echo.SetRenderer(tpl)
-	err = c.Render(http.StatusOK, "hello", "Joe")
+	err := c.Render(http.StatusOK, "hello", "Joe")
 	if assert.NoError(t, err) {
 		assert.Equal(t, http.StatusOK, rec.Code)
 		assert.Equal(t, "Hello, Joe!", rec.Body.String())
@@ -96,7 +94,18 @@ func TestContext(t *testing.T) {
 	if assert.NoError(t, err) {
 		assert.Equal(t, http.StatusOK, rec.Code)
 		assert.Equal(t, ApplicationJSON, rec.Header().Get(ContentType))
-		assert.Equal(t, usr, strings.TrimSpace(rec.Body.String()))
+		assert.Equal(t, userJSON, strings.TrimSpace(rec.Body.String()))
+	}
+
+	// XML
+	req.Header.Set(Accept, ApplicationXML)
+	rec = httptest.NewRecorder()
+	c = NewContext(req, NewResponse(rec), New())
+	err = c.XML(http.StatusOK, user{"1", "Joe"})
+	if assert.NoError(t, err) {
+		assert.Equal(t, http.StatusOK, rec.Code)
+		assert.Equal(t, ApplicationXML, rec.Header().Get(ContentType))
+		assert.Equal(t, xml.Header, xml.Header, rec.Body.String())
 	}
 
 	// String
@@ -175,7 +184,9 @@ func testBind(t *testing.T, c *Context, ct string) {
 	c.request.Header.Set(ContentType, ct)
 	u := new(user)
 	err := c.Bind(u)
-	if assert.NoError(t, err) {
+	if ct == "" {
+		assert.Error(t, UnsupportedMediaType)
+	} else if assert.NoError(t, err) {
 		assert.Equal(t, "1", u.ID)
 		assert.Equal(t, "Joe", u.Name)
 	}

echo.go

@@ -14,6 +14,7 @@ import (
 	"strings"
 	"sync"
 
+	"encoding/xml"
 	"github.com/bradfitz/http2"
 	"github.com/mattn/go-colorable"
 	"golang.org/x/net/websocket"
@@ -90,11 +91,12 @@ const (
 	//-------------
 
 	ApplicationJSON     = "application/json"
+	ApplicationXML      = "application/xml"
+	ApplicationForm     = "application/x-www-form-urlencoded"
 	ApplicationProtobuf = "application/protobuf"
 	ApplicationMsgpack  = "application/msgpack"
 	TextPlain           = "text/plain"
 	TextHTML            = "text/html"
-	ApplicationForm     = "application/x-www-form-urlencoded"
 	MultipartForm       = "multipart/form-data"
 
 	//---------
@@ -176,8 +178,8 @@ func New() (e *Echo) {
 		err := UnsupportedMediaType
 		if strings.HasPrefix(ct, ApplicationJSON) {
 			err = json.NewDecoder(r.Body).Decode(v)
-		} else if strings.HasPrefix(ct, ApplicationForm) {
-			err = nil
+		} else if strings.HasPrefix(ct, ApplicationXML) {
+			err = xml.NewDecoder(r.Body).Decode(v)
 		}
 		return err
 	})

echo_test.go

@@ -18,8 +18,8 @@ import (
 
 type (
 	user struct {
-		ID   string `json:"id"`
-		Name string `json:"name"`
+		ID   string `json:"id" xml:"id"`
+		Name string `json:"name" xml:"name"`
 	}
 )
 

website/docs/index.md

@@ -26,8 +26,9 @@ A fast and unfancy micro web framework for Golang.
 - Handy functions to send variety of HTTP response:
     - HTML
     - HTML via templates
-    - JSON
     - String 
+    - JSON
+    - XML
     - NoContent
     - Redirect
     - Error