Question

在用go编写的HTTP服务器中，我使用gorilla/mux进行路由，
我想使用http.TimeoutHandler（和/或其他“中间件”），但我无法理解我可以适应它们的位置。

说清楚：

我按gorillaMux := mux.NewRouter()
通过gorillaMux.HandleFunc("/", rootHandler)
我按server := &http.Server{Addr:":1234"}和server.ListenAndServe()

我可以在哪里插入http.TimeoutHandler或任何其他中间件？

Answer 1

以下是如何执行此操作的方法：

package main

import (
    "fmt"
    "github.com/gorilla/mux"
    "net/http"
    "time"
)

func rootHandler(w http.ResponseWriter, r *http.Request) {
    time.Sleep(5 * time.Second)
    fmt.Fprintf(w, "Hello!")
}

func main() {
    mux := mux.NewRouter()
    mux.HandleFunc("/", rootHandler)

    muxWithMiddlewares := http.TimeoutHandler(mux, time.Second*3, "Timeout!")

    http.ListenAndServe(":8080", muxWithMiddlewares)
}

如果您有多个HTTP处理程序，则可以将它们叠加起来：

// this is quite synthetic and ugly example, but it illustrates how Handlers works
muxWithMiddlewares := http.StripPrefix("/api", http.TimeoutHandler(mux, time.Second*3, "Timeout!"))

Answer 2

此解决方案未回答使用TimeoutHandler。我在这里发布这个以防任何人想要对其服务器超时进行细粒度控制。如果需要，此替代方法将允许定义IdleTimeout和RequestHeaderTimeout。我在这个例子中使用gorilla / mux和gorilla / handlers。希望它有所帮助。

// ReadTimeout is a timing constraint on the client http request imposed by the server from the moment
// of initial connection up to the time the entire request body has been read.
// [Accept] --> [TLS Handshake] --> [Request Headers] --> [Request Body] --> [Response]

// WriteTimeout is a time limit imposed on client connecting to the server via http from the
// time the server has completed reading the request header up to the time it has finished writing the response.
// [Accept] --> [TLS Handshake] --> [Request Headers] --> [Request Body] --> [Response]

func main() {
    mux := router.EpicMux()

    srv := &http.Server{
        Handler:      handlers.LoggingHandler(os.Stdout, mux),
        Addr:         "localhost:8080",
        WriteTimeout: 15 * time.Second,
        ReadTimeout:  15 * time.Second,
    }

    log.Fatal(srv.ListenAndServe())
}

func EpicMux() http.Handler {
    r := mux.NewRouter()
    r.HandleFunc("/", BaseURLRouter).Methods(http.MethodGet)
    // create the subroutes for v1 and v2
    v1 := r.PathPrefix("api/v1").Subrouter()
    // register handlers to appropriate version
    v1.HandleFunc("/person", PersonHandlerV1).Methods(http.MethodPost)

    v2 := r.PathPrefix("api/v2").Subrouter()
    v2.HandleFunc("/person",    PersonHandlerV2).Methods(http.MethodPost)
    return r
}

如何使用带有http.TimeoutHandler的gorilla mux

2 个答案: