lean into examples

examples/middleware/middleware.go

@@ -0,0 +1,22 @@
+package main
+
+import "net/http"
+import "fmt"
+
+func hello(w http.ResponseWriter, r *http.Request) {
+    w.Header().Set("Content-Type", "text/plain")
+    fmt.Fprintln(w, "Hello wrapped world")
+}
+
+func wrapMiddleware(f http.HandlerFunc) http.HandlerFunc {
+    return func(w http.ResponseWriter, r *http.Request) {
+        w.Header().Set("X-Wrapped", "true")
+        f(w, r)
+    }
+}
+
+func main() {
+    handler := wrapMiddleware(hello)
+    http.HandleFunc("/", handler)
+    http.ListenAndServe(":5000", nil)
+}

examples/middleware/middleware.sh

@@ -0,0 +1,10 @@
+$ go run middleware.go
+
+$ curl -i http://127.0.0.1:5000/
+HTTP/1.1 200 OK
+Content-Type: text/plain
+Date: Tue, 02 Oct 2012 00:37:18 GMT
+Transfer-Encoding: chunked
+X-Wrapped: true
+
+Hello wrapped world