good good study, day day up!

vendor/gopl.io/ch7/http1/main.go

@@ -0,0 +1,46 @@
+// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+// See page 191.
+
+// Http1 is a rudimentary e-commerce server.
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+)
+
+//!+main
+
+func main() {
+	db := database{"shoes": 50, "socks": 5}
+	log.Fatal(http.ListenAndServe("localhost:8000", db))
+}
+
+type dollars float32
+
+func (d dollars) String() string { return fmt.Sprintf("$%.2f", d) }
+
+type database map[string]dollars
+
+func (db database) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	for item, price := range db {
+		fmt.Fprintf(w, "%s: %s\n", item, price)
+	}
+}
+
+//!-main
+
+/*
+//!+handler
+package http
+
+type Handler interface {
+	ServeHTTP(w ResponseWriter, r *Request)
+}
+
+func ListenAndServe(address string, h Handler) error
+//!-handler
+*/