From f65c34ea78775fd26133c6901ef30af793aec931 Mon Sep 17 00:00:00 2001
From: Eduard Urbach <admin@akyoto.dev>
Date: Fri, 22 Mar 2024 14:37:21 +0100
Subject: [PATCH] Added streaming

---
 Response.go             | 10 ++++++++++
 Server_test.go          |  8 ++++++++
 examples/stream/main.go | 28 ++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 examples/stream/main.go

diff --git a/Response.go b/Response.go
index 49bbd33..fbdd14f 100644
--- a/Response.go
+++ b/Response.go
@@ -7,6 +7,7 @@ import (
 
 // Response is the interface for an HTTP response.
 type Response interface {
+	Flush()
 	Header(key string) string
 	SetHeader(key string, value string)
 	Write([]byte) (int, error)
@@ -18,6 +19,15 @@ type response struct {
 	http.ResponseWriter
 }
 
+// Flush flushes the response buffers to the client.
+func (res response) Flush() {
+	flusher, ok := res.ResponseWriter.(http.Flusher)
+
+	if ok {
+		flusher.Flush()
+	}
+}
+
 // Header returns the header value for the given key.
 func (res response) Header(key string) string {
 	return res.ResponseWriter.Header().Get(key)
diff --git a/Server_test.go b/Server_test.go
index 18d317f..9950993 100644
--- a/Server_test.go
+++ b/Server_test.go
@@ -52,6 +52,13 @@ func TestRouter(t *testing.T) {
 		return ctx.File("testdata/file.txt")
 	})
 
+	s.Get("/flush", func(ctx server.Context) error {
+		ctx.Response().WriteString("Hello 1\n")
+		ctx.Response().WriteString("Hello 2\n")
+		ctx.Response().Flush()
+		return nil
+	})
+
 	s.Get("/echo", func(ctx server.Context) error {
 		return ctx.Copy(ctx.Request())
 	})
@@ -123,6 +130,7 @@ func TestRouter(t *testing.T) {
 		{Method: "GET", URL: "/error", Body: "", Status: http.StatusUnauthorized, Response: "Not logged in"},
 		{Method: "GET", URL: "/error2", Body: "", Status: http.StatusUnauthorized, Response: "Not logged in\nMissing auth token"},
 		{Method: "GET", URL: "/file", Body: "", Status: http.StatusOK, Response: "Hello File"},
+		{Method: "GET", URL: "/flush", Body: "", Status: http.StatusOK, Response: "Hello 1\nHello 2\n"},
 		{Method: "GET", URL: "/not-found", Body: "", Status: http.StatusNotFound, Response: http.StatusText(http.StatusNotFound)},
 		{Method: "GET", URL: "/request/data", Body: "", Status: http.StatusOK, Response: "GET HTTP/1.1 example.com /request/data"},
 		{Method: "GET", URL: "/request/header", Body: "", Status: http.StatusOK, Response: ""},
diff --git a/examples/stream/main.go b/examples/stream/main.go
new file mode 100644
index 0000000..4d43d74
--- /dev/null
+++ b/examples/stream/main.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"time"
+
+	"git.akyoto.dev/go/server"
+)
+
+func main() {
+	s := server.New()
+
+	s.Get("/", func(ctx server.Context) error {
+		ticker := time.NewTicker(time.Second)
+
+		for {
+			select {
+			case <-ctx.Request().Context().Done():
+				return nil
+
+			case <-ticker.C:
+				ctx.Response().WriteString("Hello\n")
+				ctx.Response().Flush()
+			}
+		}
+	})
+
+	s.Run(":8080")
+}