add: web基本知识

web/framework/basic/main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+)
+
+func main() {
+
+	// 路由1
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, "hello basic web!")
+	})
+
+	// 路由2
+	http.HandleFunc("/xiaowei", func(w http.ResponseWriter, r *http.Request) {
+		headers := r.Header
+		for k, v := range headers {
+			fmt.Fprintf(w, "[%v]-[%v]\n", k, v)
+		}
+	})
+	// 启动一个httpserver
+	if err := http.ListenAndServe(":9000", nil); err != nil {
+		panic(err)
+	}
+}

web/framework/hander-basic/main.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+)
+
+// Engine 定义一个结构体
+type Engine struct {
+}
+
+// 实现Handler的ServerHTTP方法
+func (e *Engine) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	switch r.RequestURI {
+	case "/":
+		fmt.Fprint(w, "hello handler-basic")
+	case "/web":
+		for k, v := range r.Header {
+			fmt.Fprintln(w, k, "-->", v)
+		}
+	}
+}
+
+func main() {
+	engine := new(Engine)
+	if err := http.ListenAndServe(":9000", engine); err != nil {
+		panic(err)
+	}
+}