From cee7bea85c19e6900e8d599da60555d0817cb02a Mon Sep 17 00:00:00 2001
From: Nicolas Lepage <19571875+nlepage@users.noreply.github.com>
Date: Tue, 26 Nov 2019 23:35:43 +0100
Subject: [PATCH] :construction:

---
 response_writer.go | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 response_writer.go

diff --git a/response_writer.go b/response_writer.go
new file mode 100644
index 0000000..a87cd56
--- /dev/null
+++ b/response_writer.go
@@ -0,0 +1,52 @@
+package wasmhttp
+
+import (
+	"bytes"
+	"net/http"
+	"syscall/js"
+)
+
+// ResponseWriter implements http.ResponseWriter
+type ResponseWriter struct {
+	header     http.Header
+	buf        *bytes.Buffer
+	statusCode int
+}
+
+// NewResponseWriter creates a new ResponseWriter
+func NewResponseWriter() *ResponseWriter {
+	return &ResponseWriter{
+		header:     http.Header{},
+		buf:        bytes.NewBuffer(nil),
+		statusCode: 0,
+	}
+}
+
+var _ http.ResponseWriter = (*ResponseWriter)(nil)
+
+func (rw *ResponseWriter) Header() http.Header {
+	return rw.header
+}
+
+func (rw *ResponseWriter) Write(p []byte) (int, error) {
+	return rw.buf.Write(p)
+}
+
+func (rw *ResponseWriter) WriteHeader(statusCode int) {
+	rw.statusCode = statusCode
+}
+
+func (rw *ResponseWriter) JSResponse() js.Value {
+	init := js.Global().Get("Object").New()
+
+	if rw.statusCode != 0 {
+		init.Set("status", rw.statusCode)
+	}
+
+	//FIXME headers
+
+	jsBody := js.Global().Get("Uint8Array").New(rw.buf.Len())
+	js.CopyBytesToJS(jsBody, rw.buf.Bytes())
+
+	return js.Global().Get("Response").New(jsBody, init)
+}