prototyped svg reports

server/response/html.go

@@ -11,8 +11,9 @@ import (
 
 type (
 	htmlRes struct {
-		body []byte
-		res  Response
+		body   []byte
+		reader io.Reader
+		res    Response
 	}
 )
 
@@ -24,6 +25,12 @@ func HTML(body []byte) Response {
 	}
 }
 
+func HTMLReader(body io.Reader) Response {
+	return htmlRes{
+		reader: body,
+	}
+}
+
 func (h htmlRes) String() string {
 	if h.res != nil {
 		return fmt.Sprintf(`{"body": %q, "nested": %s}`, string(h.body), h.res)
@@ -46,6 +53,13 @@ func (h htmlRes) Redirect(code redirect.Code, to string) Response {
 
 func (h htmlRes) HTML(body []byte) Response {
 	h.body = body
+	h.reader = nil
+	return h
+}
+
+func (h htmlRes) HTMLReader(body io.Reader) Response {
+	h.body = nil
+	h.reader = body
 	return h
 }
 
@@ -133,7 +147,13 @@ func (h htmlRes) GetRedirect() (code redirect.Code, to string, ok bool) {
 }
 
 func (h htmlRes) getBody() (body io.ReadCloser, ok bool, err error) {
-	return io.NopCloser(bytes.NewBuffer(h.body)), true, nil
+	var r io.Reader
+	if h.reader != nil {
+		r = h.reader
+	} else {
+		r = bytes.NewBuffer(h.body)
+	}
+	return io.NopCloser(r), true, nil
 }
 
 func (h htmlRes) getCookies() []http.Cookie {