diff --git a/example_test.go b/example_test.go
index 075107b0..666914d2 100644
--- a/example_test.go
+++ b/example_test.go
@@ -6,6 +6,7 @@ import (
"context"
"log"
"net/http"
+ "net/url"
"time"
"nhooyr.io/websocket"
@@ -115,3 +116,30 @@ func Example_writeOnly() {
err := http.ListenAndServe("localhost:8080", fn)
log.Fatal(err)
}
+
+// This example demonstrates how to safely accept cross origin WebSockets
+// from the origin example.com.
+func Example_crossOrigin() {
+ fn := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+ origin := r.Header.Get("Origin")
+ if origin != "" {
+ u, err := url.Parse(origin)
+ if err != nil || u.Host != "example.com" {
+ http.Error(w, "bad origin header", http.StatusForbidden)
+ return
+ }
+ }
+
+ c, err := websocket.Accept(w, r, &websocket.AcceptOptions{
+ InsecureSkipVerify: true,
+ })
+ if err != nil {
+ log.Println(err)
+ return
+ }
+ c.Close(websocket.StatusNormalClosure, "cross origin WebSocket accepted")
+ })
+
+ err := http.ListenAndServe("localhost:8080", fn)
+ log.Fatal(err)
+}
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