98 lines
2.3 KiB
Go
98 lines
2.3 KiB
Go
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package server
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import (
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"context"
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"crypto/subtle"
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"encoding/json"
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"log"
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"net"
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"net/http"
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"time"
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"github.com/julienschmidt/httprouter"
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)
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type HttpServer struct {
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server *http.Server
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router *httprouter.Router
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}
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func NewHttpServer() *HttpServer {
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r := httprouter.New()
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return &HttpServer{
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server: &http.Server{
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ReadTimeout: 3 * time.Second,
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WriteTimeout: 3 * time.Second,
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Handler: r,
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},
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router: r,
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}
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}
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func (s *HttpServer) GET(path string, handler http.HandlerFunc) {
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s.router.Handler(http.MethodGet, path, handler)
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}
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func (s *HttpServer) POST(path string, handler http.HandlerFunc) {
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s.router.Handler(http.MethodPost, path, handler)
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}
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func (s *HttpServer) PATCH(path string, handler http.HandlerFunc) {
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s.router.Handler(http.MethodPatch, path, handler)
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}
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func (s *HttpServer) PUT(path string, handler http.HandlerFunc) {
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s.router.Handler(http.MethodPut, path, handler)
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}
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func (s *HttpServer) DELETE(path string, handler http.HandlerFunc) {
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s.router.Handler(http.MethodDelete, path, handler)
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}
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// GetURLParams wrapper around underlying router for getting URL parameters.
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func GetURLParams(r *http.Request) httprouter.Params {
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return httprouter.ParamsFromContext(r.Context())
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}
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func (s *HttpServer) Start(network, address string) error {
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listener, err := net.Listen(network, address)
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if err != nil {
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return err
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}
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go func() {
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if err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {
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log.Fatalln(err)
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}
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}()
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return nil
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}
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func (s *HttpServer) Stop() error {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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if err := s.server.Shutdown(ctx); err != nil {
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return err
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}
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return nil
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}
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// AuthWithToken middleware that authenticates user by token (that is effectively just a password)
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// supplied in an 'Authentication-Token' HTTP header.
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func AuthWithToken(handler http.HandlerFunc, token string) http.HandlerFunc {
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return func(rw http.ResponseWriter, r *http.Request) {
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if subtle.ConstantTimeCompare([]byte(r.Header.Get("Authentication-Token")), []byte(token)) == 1 {
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handler(rw, r)
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} else {
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rw.WriteHeader(http.StatusUnauthorized)
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rw.Header().Add("Content-Type", "application/json")
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response := make(map[string]string)
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response["message"] = "Unauthorized"
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json.NewEncoder(rw).Encode(response)
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}
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}
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}
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