## httprouter git@github.com:julienschmidt/httprouter.git 示例： ``` package main import ( "fmt" "log" "net/http" "github.com/julienschmidt/httprouter" ) func Index(w http.ResponseWriter, r *http.Request, _ httprouter.Params) { fmt.Fprint(w, "Welcome!\n") } func Hello(w http.ResponseWriter, r *http.Request, ps httprouter.Params) { fmt.Fprintf(w, "hello, %s!\n", ps.ByName("name")) } func main() { router := httprouter.New() router.GET("/", Index) router.GET("/hello/:name", Hello) log.Fatal(http.ListenAndServe(":8080", router)) } © 2020 GitHub, Inc ``` ### ROA(Resource Oriented Architecture) 面向资源的架构 ``` package main import ( "encoding/json" "fmt" "log" "net/http" "github.com/julienschmidt/httprouter" ) type Employee struct { ID string `json:"id"` Name string `json:"name"` Age int `json:"age"` } var employeeDB map[string]*Employee func init() { employeeDB = map[string]*Employee{} employeeDB["Mike"] = &Employee{"e-1", "Mike", 35} employeeDB["Rose"] = &Employee{"e-2", "Rose", 45} } func Index(w http.ResponseWriter, r *http.Request, _ httprouter.Params) { fmt.Fprint(w, "Welcome!\n") } func GetEmployeeByName(w http.ResponseWriter, r *http.Request, ps httprouter.Params) { qName := ps.ByName("name") var ( ok bool info *Employee infoJson []byte err error ) if info, ok = employeeDB[qName]; !ok { w.Write([]byte("{\"error\":\"Not Found\"}")) return } if infoJson, err = json.Marshal(info); err != nil { w.Write([]byte(fmt.Sprintf("{\"error\":,\"%s\"}", err))) return } w.Write(infoJson) } func main() { router := httprouter.New() router.GET("/", Index) router.GET("/employee/:name", GetEmployeeByName) log.Fatal(http.ListenAndServe(":8080", router)) } ```