Since some templating engines final result is a buffer, we've been casting them to strings, which is a bit unnecessary considering under the hood Echo supports this.

Author: RyanCopley

context.go

@@ -106,6 +106,9 @@ type (
 		// HTML sends an HTTP response with status code.
 		HTML(int, string) error
 
+		// HTMLBuffer sends an HTTP response via a bytes.Buffer with status code.
+		HTMLBuffer(int, *bytes.Buffer) error
+
 		// String sends a string response with status code.
 		String(int, string) error
 
@@ -362,6 +365,13 @@ func (c *context) HTML(code int, html string) (err error) {
 	return
 }
 
+func (c *context) HTMLBuffer(code int, buf *bytes.Buffer) (err error) {
+	c.response.Header().Set(HeaderContentType, MIMETextHTMLCharsetUTF8)
+	c.response.WriteHeader(code)
+	_, err = c.response.Write(buf.Bytes())
+	return
+}
+
 func (c *context) String(code int, s string) (err error) {
 	c.response.Header().Set(HeaderContentType, MIMETextPlainCharsetUTF8)
 	c.response.WriteHeader(code)

context_test.go

@@ -126,6 +126,16 @@ func TestContext(t *testing.T) {
 		assert.Equal(t, "Hello, <strong>World!</strong>", rec.Body.String())
 	}
 
+	// HTMLBuffer
+	rec = httptest.NewRecorder()
+	c = e.NewContext(req, rec).(*context)
+	err = c.HTMLBuffer(http.StatusOK, bytes.NewBufferString("Hello, <strong>World!</strong>"))
+	if assert.NoError(t, err) {
+		assert.Equal(t, http.StatusOK, rec.Status())
+		assert.Equal(t, MIMETextHTMLCharsetUTF8, rec.Header().Get(HeaderContentType))
+		assert.Equal(t, "Hello, <strong>World!</strong>", rec.Body.String())
+	}
+
 	// Stream
 	rec = httptest.NewRecorder()
 	c = e.NewContext(req, rec).(*context)