怎样用Golang实现一个RESTful API Golang构建API的完整流程

GOPATH

go mod init your_module_name

net/http

package main

import (
    "fmt"
    "net/http"
)

func hello(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, World!")
}

func main() {
    http.HandleFunc("/", hello)
    fmt.Println("Starting server at port 8080")
    if err := http.ListenAndServe(":8080", nil); err != nil {
        panic(err)
    }
}

http://localhost:8080

http.HandleFunc

go get -u github.com/gorilla/mux

r := mux.NewRouter()
r.HandleFunc("/users/{id}", func(w http.ResponseWriter, r *http.Request) {
    vars := mux.Vars(r)
    id := vars["id"]
    fmt.Fprintf(w, "User ID: %s", id)
}).Methods("GET")

http.ListenAndServe(":8080", r)

type User struct {
    ID   string `json:"id"`
    Name string `json:"name"`
}

r.HandleFunc("/users", func(w http.ResponseWriter, r *http.Request) {
    var user User
    if err := json.NewDecoder(r.Body).Decode(&user); err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }
    fmt.Printf("Received user: %+v\n", user)
    w.WriteHeader(http.StatusOK)
    json.NewEncoder(w).Encode(user)
}).Methods("POST")

go get github.com/rs/cors

handler := cors.Default().Handler(r)
http.ListenAndServe(":8080", handler)

func loggingMiddleware(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        log.Printf("%s %s %s", r.RemoteAddr, r.Method, r.URL)
        next.ServeHTTP(w, r)
    })
}

http.ListenAndServe(":8080", loggingMiddleware(handler))

main.go
handlers/
    user.go
models/
    user.go
middleware/
    logger.go