diff --git a/README.md b/README.md
index 75bbc140..c2cfe2d0 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,7 @@ Gin is a web framework written in Go (Golang). It features a martini-like API wi
     - [Querystring parameters](#querystring-parameters)
     - [Multipart/Urlencoded Form](#multiparturlencoded-form)
     - [Another example: query + post form](#another-example-query--post-form)
+    - [Map as querystring or postform parameters](#map-as-querystring-or-postform-parameters)
     - [Upload files](#upload-files)
     - [Grouping routes](#grouping-routes)
     - [Blank Gin without middleware by default](#blank-gin-without-middleware-by-default)
@@ -324,6 +325,34 @@ func main() {
 id: 1234; page: 1; name: manu; message: this_is_great
 ```
 
+### Map as querystring or postform parameters
+
+```
+POST /post?ids[a]=1234&ids[b]=hello HTTP/1.1
+Content-Type: application/x-www-form-urlencoded
+
+names[first]=thinkerou&names[second]=tianou
+```
+
+```go
+func main() {
+	router := gin.Default()
+
+	router.POST("/post", func(c *gin.Context) {
+
+		ids := c.QueryMap("ids")
+		names := c.PostFormMap("names")
+
+		fmt.Printf("ids: %v; names: %v", ids, names)
+	})
+	router.Run(":8080")
+}
+```
+
+```
+ids: map[b:hello a:1234], names: map[second:tianou first:thinkerou]
+```
+
 ### Upload files
 
 #### Single file
@@ -901,6 +930,29 @@ func main() {
 }
 ```
 
+#### AsciiJSON
+
+Using AsciiJSON to Generates ASCII-only JSON with escaped non-ASCII chracters.
+
+```go
+func main() {
+	r := gin.Default()
+
+	r.GET("/someJSON", func(c *gin.Context) {
+		data := map[string]interface{}{
+			"lang": "GO语言",
+			"tag":  "<br>",
+		}
+
+		// will output : {"lang":"GO\u8bed\u8a00","tag":"\u003cbr\u003e"}
+		c.AsciiJSON(http.StatusOK, data)
+	})
+
+	// Listen and serve on 0.0.0.0:8080
+	r.Run(":8080")
+}
+```
+
 ### Serving static files
 
 ```go
diff --git a/context.go b/context.go
index 6fc5d25f..724ded79 100644
--- a/context.go
+++ b/context.go
@@ -159,16 +159,15 @@ func (c *Context) Error(err error) *Error {
 	if err == nil {
 		panic("err is nil")
 	}
-	var parsedError *Error
-	switch err.(type) {
-	case *Error:
-		parsedError = err.(*Error)
-	default:
+
+	parsedError, ok := err.(*Error)
+	if !ok {
 		parsedError = &Error{
 			Err:  err,
 			Type: ErrorTypePrivate,
 		}
 	}
+
 	c.Errors = append(c.Errors, parsedError)
 	return parsedError
 }
@@ -361,6 +360,18 @@ func (c *Context) GetQueryArray(key string) ([]string, bool) {
 	return []string{}, false
 }
 
+// QueryMap returns a map for a given query key.
+func (c *Context) QueryMap(key string) map[string]string {
+	dicts, _ := c.GetQueryMap(key)
+	return dicts
+}
+
+// GetQueryMap returns a map for a given query key, plus a boolean value
+// whether at least one value exists for the given key.
+func (c *Context) GetQueryMap(key string) (map[string]string, bool) {
+	return c.get(c.Request.URL.Query(), key)
+}
+
 // PostForm returns the specified key from a POST urlencoded form or multipart form
 // when it exists, otherwise it returns an empty string `("")`.
 func (c *Context) PostForm(key string) string {
@@ -416,6 +427,42 @@ func (c *Context) GetPostFormArray(key string) ([]string, bool) {
 	return []string{}, false
 }
 
+// PostFormMap returns a map for a given form key.
+func (c *Context) PostFormMap(key string) map[string]string {
+	dicts, _ := c.GetPostFormMap(key)
+	return dicts
+}
+
+// GetPostFormMap returns a map for a given form key, plus a boolean value
+// whether at least one value exists for the given key.
+func (c *Context) GetPostFormMap(key string) (map[string]string, bool) {
+	req := c.Request
+	req.ParseForm()
+	req.ParseMultipartForm(c.engine.MaxMultipartMemory)
+	dicts, exist := c.get(req.PostForm, key)
+
+	if !exist && req.MultipartForm != nil && req.MultipartForm.File != nil {
+		dicts, exist = c.get(req.MultipartForm.Value, key)
+	}
+
+	return dicts, exist
+}
+
+// get is an internal method and returns a map which satisfy conditions.
+func (c *Context) get(m map[string][]string, key string) (map[string]string, bool) {
+	dicts := make(map[string]string)
+	exist := false
+	for k, v := range m {
+		if i := strings.IndexByte(k, '['); i >= 1 && k[0:i] == key {
+			if j := strings.IndexByte(k[i+1:], ']'); j >= 1 {
+				exist = true
+				dicts[k[i+1:][:j]] = v[0]
+			}
+		}
+	}
+	return dicts, exist
+}
+
 // FormFile returns the first file for the provided form key.
 func (c *Context) FormFile(name string) (*multipart.FileHeader, error) {
 	_, fh, err := c.Request.FormFile(name)
@@ -695,7 +742,12 @@ func (c *Context) SecureJSON(code int, obj interface{}) {
 // It add padding to response body to request data from a server residing in a different domain than the client.
 // It also sets the Content-Type as "application/javascript".
 func (c *Context) JSONP(code int, obj interface{}) {
-	c.Render(code, render.JsonpJSON{Callback: c.DefaultQuery("callback", ""), Data: obj})
+	callback := c.DefaultQuery("callback", "")
+	if callback == "" {
+		c.Render(code, render.JSON{Data: obj})
+	} else {
+		c.Render(code, render.JsonpJSON{Callback: callback, Data: obj})
+	}
 }
 
 // JSON serializes the given struct as JSON into the response body.
@@ -704,6 +756,12 @@ func (c *Context) JSON(code int, obj interface{}) {
 	c.Render(code, render.JSON{Data: obj})
 }
 
+// AsciiJSON serializes the given struct as JSON into the response body with unicode to ASCII string.
+// It also sets the Content-Type as "application/json".
+func (c *Context) AsciiJSON(code int, obj interface{}) {
+	c.Render(code, render.AsciiJSON{Data: obj})
+}
+
 // XML serializes the given struct as XML into the response body.
 // It also sets the Content-Type as "application/xml".
 func (c *Context) XML(code int, obj interface{}) {
diff --git a/context_test.go b/context_test.go
index 12e02fa0..40ae5bf8 100644
--- a/context_test.go
+++ b/context_test.go
@@ -21,6 +21,7 @@ import (
 	"github.com/gin-gonic/gin/binding"
 	"github.com/stretchr/testify/assert"
 	"golang.org/x/net/context"
+	"io"
 )
 
 var _ context.Context = &Context{}
@@ -47,6 +48,8 @@ func createMultipartRequest() *http.Request {
 	must(mw.WriteField("time_local", "31/12/2016 14:55"))
 	must(mw.WriteField("time_utc", "31/12/2016 14:55"))
 	must(mw.WriteField("time_location", "31/12/2016 14:55"))
+	must(mw.WriteField("names[a]", "thinkerou"))
+	must(mw.WriteField("names[b]", "tianou"))
 	req, err := http.NewRequest("POST", "/", body)
 	must(err)
 	req.Header.Set("Content-Type", MIMEMultipartPOSTForm+"; boundary="+boundary)
@@ -371,7 +374,8 @@ func TestContextQuery(t *testing.T) {
 func TestContextQueryAndPostForm(t *testing.T) {
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	body := bytes.NewBufferString("foo=bar&page=11&both=&foo=second")
-	c.Request, _ = http.NewRequest("POST", "/?both=GET&id=main&id=omit&array[]=first&array[]=second", body)
+	c.Request, _ = http.NewRequest("POST",
+		"/?both=GET&id=main&id=omit&array[]=first&array[]=second&ids[a]=hi&ids[b]=3.14", body)
 	c.Request.Header.Add("Content-Type", MIMEPOSTForm)
 
 	assert.Equal(t, "bar", c.DefaultPostForm("foo", "none"))
@@ -439,6 +443,30 @@ func TestContextQueryAndPostForm(t *testing.T) {
 	values = c.QueryArray("both")
 	assert.Equal(t, 1, len(values))
 	assert.Equal(t, "GET", values[0])
+
+	dicts, ok := c.GetQueryMap("ids")
+	assert.True(t, ok)
+	assert.Equal(t, "hi", dicts["a"])
+	assert.Equal(t, "3.14", dicts["b"])
+
+	dicts, ok = c.GetQueryMap("nokey")
+	assert.False(t, ok)
+	assert.Equal(t, 0, len(dicts))
+
+	dicts, ok = c.GetQueryMap("both")
+	assert.False(t, ok)
+	assert.Equal(t, 0, len(dicts))
+
+	dicts, ok = c.GetQueryMap("array")
+	assert.False(t, ok)
+	assert.Equal(t, 0, len(dicts))
+
+	dicts = c.QueryMap("ids")
+	assert.Equal(t, "hi", dicts["a"])
+	assert.Equal(t, "3.14", dicts["b"])
+
+	dicts = c.QueryMap("nokey")
+	assert.Equal(t, 0, len(dicts))
 }
 
 func TestContextPostFormMultipart(t *testing.T) {
@@ -515,6 +543,22 @@ func TestContextPostFormMultipart(t *testing.T) {
 	values = c.PostFormArray("foo")
 	assert.Equal(t, 1, len(values))
 	assert.Equal(t, "bar", values[0])
+
+	dicts, ok := c.GetPostFormMap("names")
+	assert.True(t, ok)
+	assert.Equal(t, "thinkerou", dicts["a"])
+	assert.Equal(t, "tianou", dicts["b"])
+
+	dicts, ok = c.GetPostFormMap("nokey")
+	assert.False(t, ok)
+	assert.Equal(t, 0, len(dicts))
+
+	dicts = c.PostFormMap("names")
+	assert.Equal(t, "thinkerou", dicts["a"])
+	assert.Equal(t, "tianou", dicts["b"])
+
+	dicts = c.PostFormMap("nokey")
+	assert.Equal(t, 0, len(dicts))
 }
 
 func TestContextSetCookie(t *testing.T) {
@@ -596,6 +640,20 @@ func TestContextRenderJSONP(t *testing.T) {
 	assert.Equal(t, "application/javascript; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
 
+// Tests that the response is serialized as JSONP
+// and Content-Type is set to application/json
+func TestContextRenderJSONPWithoutCallback(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+	c.Request, _ = http.NewRequest("GET", "http://example.com", nil)
+
+	c.JSONP(201, H{"foo": "bar"})
+
+	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
+	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
+}
+
 // Tests that no JSON is rendered if code is 204
 func TestContextRenderNoContentJSON(t *testing.T) {
 	w := httptest.NewRecorder()
@@ -686,6 +744,17 @@ func TestContextRenderNoContentSecureJSON(t *testing.T) {
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
 
+func TestContextRenderNoContentAsciiJSON(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+
+	c.AsciiJSON(http.StatusNoContent, []string{"lang", "Go语言"})
+
+	assert.Equal(t, http.StatusNoContent, w.Code)
+	assert.Empty(t, w.Body.String())
+	assert.Equal(t, "application/json", w.HeaderMap.Get("Content-Type"))
+}
+
 // Tests that the response executes the templates
 // and responds with Content-Type set to text/html
 func TestContextRenderHTML(t *testing.T) {
@@ -1490,3 +1559,38 @@ func TestContextRenderDataFromReader(t *testing.T) {
 	assert.Equal(t, fmt.Sprintf("%d", contentLength), w.HeaderMap.Get("Content-Length"))
 	assert.Equal(t, extraHeaders["Content-Disposition"], w.HeaderMap.Get("Content-Disposition"))
 }
+
+func TestContextStream(t *testing.T) {
+	w := CreateTestResponseRecorder()
+	c, _ := CreateTestContext(w)
+
+	stopStream := true
+	c.Stream(func(w io.Writer) bool {
+		defer func() {
+			stopStream = false
+		}()
+
+		w.Write([]byte("test"))
+
+		return stopStream
+	})
+
+	assert.Equal(t, "testtest", w.Body.String())
+}
+
+func TestContextStreamWithClientGone(t *testing.T) {
+	w := CreateTestResponseRecorder()
+	c, _ := CreateTestContext(w)
+
+	c.Stream(func(writer io.Writer) bool {
+		defer func() {
+			w.closeClient()
+		}()
+
+		writer.Write([]byte("test"))
+
+		return true
+	})
+
+	assert.Equal(t, "test", w.Body.String())
+}
diff --git a/errors_test.go b/errors_test.go
index a666d7c1..0626611f 100644
--- a/errors_test.go
+++ b/errors_test.go
@@ -19,17 +19,17 @@ func TestError(t *testing.T) {
 		Type: ErrorTypePrivate,
 	}
 	assert.Equal(t, err.Error(), baseError.Error())
-	assert.Equal(t, err.JSON(), H{"error": baseError.Error()})
+	assert.Equal(t, H{"error": baseError.Error()}, err.JSON())
 
 	assert.Equal(t, err.SetType(ErrorTypePublic), err)
-	assert.Equal(t, err.Type, ErrorTypePublic)
+	assert.Equal(t, ErrorTypePublic, err.Type)
 
 	assert.Equal(t, err.SetMeta("some data"), err)
-	assert.Equal(t, err.Meta, "some data")
-	assert.Equal(t, err.JSON(), H{
+	assert.Equal(t, "some data", err.Meta)
+	assert.Equal(t, H{
 		"error": baseError.Error(),
 		"meta":  "some data",
-	})
+	}, err.JSON())
 
 	jsonBytes, _ := json.Marshal(err)
 	assert.Equal(t, "{\"error\":\"test error\",\"meta\":\"some data\"}", string(jsonBytes))
@@ -38,22 +38,22 @@ func TestError(t *testing.T) {
 		"status": "200",
 		"data":   "some data",
 	})
-	assert.Equal(t, err.JSON(), H{
+	assert.Equal(t, H{
 		"error":  baseError.Error(),
 		"status": "200",
 		"data":   "some data",
-	})
+	}, err.JSON())
 
 	err.SetMeta(H{
 		"error":  "custom error",
 		"status": "200",
 		"data":   "some data",
 	})
-	assert.Equal(t, err.JSON(), H{
+	assert.Equal(t, H{
 		"error":  "custom error",
 		"status": "200",
 		"data":   "some data",
-	})
+	}, err.JSON())
 
 	type customError struct {
 		status string
diff --git a/ginS/gins.go b/ginS/gins.go
index ee00b381..a7686f23 100644
--- a/ginS/gins.go
+++ b/ginS/gins.go
@@ -128,7 +128,7 @@ func Run(addr ...string) (err error) {
 // RunTLS : The router is attached to a http.Server and starts listening and serving HTTPS requests.
 // It is a shortcut for http.ListenAndServeTLS(addr, certFile, keyFile, router)
 // Note: this method will block the calling goroutine undefinitelly unless an error happens.
-func RunTLS(addr string, certFile string, keyFile string) (err error) {
+func RunTLS(addr, certFile, keyFile string) (err error) {
 	return engine().RunTLS(addr, certFile, keyFile)
 }
 
diff --git a/render/json.go b/render/json.go
index 3a2e8b2f..6e5089a0 100755
--- a/render/json.go
+++ b/render/json.go
@@ -6,6 +6,7 @@ package render
 
 import (
 	"bytes"
+	"fmt"
 	"html/template"
 	"net/http"
 
@@ -30,10 +31,15 @@ type JsonpJSON struct {
 	Data     interface{}
 }
 
+type AsciiJSON struct {
+	Data interface{}
+}
+
 type SecureJSONPrefix string
 
 var jsonContentType = []string{"application/json; charset=utf-8"}
 var jsonpContentType = []string{"application/javascript; charset=utf-8"}
+var jsonAsciiContentType = []string{"application/json"}
 
 func (r JSON) Render(w http.ResponseWriter) (err error) {
 	if err = WriteJSON(w, r.Data); err != nil {
@@ -112,3 +118,29 @@ func (r JsonpJSON) Render(w http.ResponseWriter) (err error) {
 func (r JsonpJSON) WriteContentType(w http.ResponseWriter) {
 	writeContentType(w, jsonpContentType)
 }
+
+func (r AsciiJSON) Render(w http.ResponseWriter) (err error) {
+	r.WriteContentType(w)
+	ret, err := json.Marshal(r.Data)
+	if err != nil {
+		return err
+	}
+
+	var buffer bytes.Buffer
+	for _, r := range string(ret) {
+		cvt := ""
+		if r < 128 {
+			cvt = string(r)
+		} else {
+			cvt = fmt.Sprintf("\\u%04x", int64(r))
+		}
+		buffer.WriteString(cvt)
+	}
+
+	w.Write(buffer.Bytes())
+	return nil
+}
+
+func (r AsciiJSON) WriteContentType(w http.ResponseWriter) {
+	writeContentType(w, jsonAsciiContentType)
+}
diff --git a/render/render.go b/render/render.go
index 7caf9bba..4ff1c7b6 100755
--- a/render/render.go
+++ b/render/render.go
@@ -26,6 +26,7 @@ var (
 	_ Render     = YAML{}
 	_ Render     = MsgPack{}
 	_ Render     = Reader{}
+	_ Render     = AsciiJSON{}
 )
 
 func writeContentType(w http.ResponseWriter, value []string) {
diff --git a/render/render_test.go b/render/render_test.go
index 40ec806e..2f728441 100755
--- a/render/render_test.go
+++ b/render/render_test.go
@@ -167,6 +167,35 @@ func TestRenderJsonpJSONFail(t *testing.T) {
 	assert.Error(t, err)
 }
 
+func TestRenderAsciiJSON(t *testing.T) {
+	w1 := httptest.NewRecorder()
+	data1 := map[string]interface{}{
+		"lang": "GO语言",
+		"tag":  "<br>",
+	}
+
+	err := (AsciiJSON{data1}).Render(w1)
+
+	assert.NoError(t, err)
+	assert.Equal(t, "{\"lang\":\"GO\\u8bed\\u8a00\",\"tag\":\"\\u003cbr\\u003e\"}", w1.Body.String())
+	assert.Equal(t, "application/json", w1.Header().Get("Content-Type"))
+
+	w2 := httptest.NewRecorder()
+	data2 := float64(3.1415926)
+
+	err = (AsciiJSON{data2}).Render(w2)
+	assert.NoError(t, err)
+	assert.Equal(t, "3.1415926", w2.Body.String())
+}
+
+func TestRenderAsciiJSONFail(t *testing.T) {
+	w := httptest.NewRecorder()
+	data := make(chan int)
+
+	// json: unsupported type: chan int
+	assert.Error(t, (AsciiJSON{data}).Render(w))
+}
+
 type xmlmap map[string]interface{}
 
 // Allows type H to be used with xml.Marshal
diff --git a/response_writer.go b/response_writer.go
index 166ae8c3..923b53f8 100644
--- a/response_writer.go
+++ b/response_writer.go
@@ -110,5 +110,6 @@ func (w *responseWriter) CloseNotify() <-chan bool {
 
 // Flush implements the http.Flush interface.
 func (w *responseWriter) Flush() {
+	w.WriteHeaderNow()
 	w.ResponseWriter.(http.Flusher).Flush()
 }
diff --git a/response_writer_test.go b/response_writer_test.go
index cec27338..fcc48b3b 100644
--- a/response_writer_test.go
+++ b/response_writer_test.go
@@ -51,7 +51,7 @@ func TestResponseWriterWriteHeader(t *testing.T) {
 	w.WriteHeader(300)
 	assert.False(t, w.Written())
 	assert.Equal(t, 300, w.Status())
-	assert.NotEqual(t, testWritter.Code, 300)
+	assert.NotEqual(t, 300, testWritter.Code)
 
 	w.WriteHeader(-1)
 	assert.Equal(t, 300, w.Status())
@@ -113,3 +113,19 @@ func TestResponseWriterHijack(t *testing.T) {
 
 	w.Flush()
 }
+
+func TestResponseWriterFlush(t *testing.T) {
+	testServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		writer := &responseWriter{}
+		writer.reset(w)
+
+		writer.WriteHeader(http.StatusInternalServerError)
+		writer.Flush()
+	}))
+	defer testServer.Close()
+
+	// should return 500
+	resp, err := http.Get(testServer.URL)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusInternalServerError, resp.StatusCode)
+}
diff --git a/test_helpers.go b/test_helpers.go
index 2aed37f2..554568d9 100644
--- a/test_helpers.go
+++ b/test_helpers.go
@@ -6,6 +6,7 @@ package gin
 
 import (
 	"net/http"
+	"net/http/httptest"
 )
 
 // CreateTestContext returns a fresh engine and context for testing purposes
@@ -16,3 +17,23 @@ func CreateTestContext(w http.ResponseWriter) (c *Context, r *Engine) {
 	c.writermem.reset(w)
 	return
 }
+
+type TestResponseRecorder struct {
+	*httptest.ResponseRecorder
+	closeChannel chan bool
+}
+
+func (r *TestResponseRecorder) CloseNotify() <-chan bool {
+	return r.closeChannel
+}
+
+func (r *TestResponseRecorder) closeClient() {
+	r.closeChannel <- true
+}
+
+func CreateTestResponseRecorder() *TestResponseRecorder {
+	return &TestResponseRecorder{
+		httptest.NewRecorder(),
+		make(chan bool, 1),
+	}
+}