renumber again

087-http-server-log/http-server-log.go

@@ -0,0 +1,40 @@
+// ## HTTP Server Logging
+
+package main
+
+import "net/http"
+import "time"
+import "fmt"
+
+func runLogging(logs chan string) {
+	for log := range logs {
+		fmt.Println(log)
+	}
+}
+
+func wrapLogging(f http.HandlerFunc) http.HandlerFunc {
+	logs := make(chan string, 10000)
+	go runLogging(logs)
+	return func(res http.ResponseWriter, req *http.Request) {
+		start := time.Now()
+		f(res, req)
+		method := req.Method
+		path := req.URL.Path
+		elapsed := float64(time.Since(start)) / 1000000.0
+		logs <- fmt.Sprintf("method=%s path=%s elapsed=%f", method, path, elapsed)
+	}
+}
+
+func hello(res http.ResponseWriter, req *http.Request) {
+    res.Header().Set("Content-Type", "text/plain")
+	time.Sleep(time.Millisecond * 50)
+	fmt.Fprintln(res, "Hello logged world")
+}
+
+func main() {
+	handler := wrapLogging(hello)
+    http.HandleFunc("/", handler)
+    http.ListenAndServe(":5000", nil)
+}
+
+// todo: status code?