Golang http.NewServer函數代碼示例

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

	ctx := context.Background()
	svc := yell.YellingService{}

	yellHandler := httptransport.NewServer(
		ctx,
		yell.MakeYellEndpoint(svc),
		yell.DecodeYellRequest,
		yell.EncodeResponse,
	)

	composeHandler := httptransport.NewServer(
		ctx,
		compose.MakeComposeEndpoint(svc),
		compose.DecodeComposeRequest,
		compose.EncodeResponse,
	)

	router.HandleFunc("/", RootHandler)
	router.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(*staticPath))))
	http.Handle("/yell", yellHandler)
	http.Handle("/compose", composeHandler)
	go http.ListenAndServe(":8080", nil)
	go log.Fatal(http.ListenAndServe(":8081", router))
}

func main() {
	var (
		listen = flag.String("listen", ":8080", "HTTP listen address")
		proxy  = flag.String("proxy", "", "Optional comma-separated list of URLs to proxy uppercase requests")
	)
	flag.Parse()

	var logger log.Logger
	logger = log.NewLogfmtLogger(os.Stderr)
	logger = log.NewContext(logger).With("listen", *listen).With("caller", log.DefaultCaller)

	ctx := context.Background()

	fieldKeys := []string{"method", "error"}
	requestCount := kitprometheus.NewCounter(stdprometheus.CounterOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "request_count",
		Help:      "Number of requests received.",
	}, fieldKeys)
	requestLatency := metrics.NewTimeHistogram(time.Microsecond, kitprometheus.NewSummary(stdprometheus.SummaryOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "request_latency_microseconds",
		Help:      "Total duration of requests in microseconds.",
	}, fieldKeys))
	countResult := kitprometheus.NewSummary(stdprometheus.SummaryOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "count_result",
		Help:      "The result of each count method.",
	}, []string{})

	var svc StringService
	svc = stringService{}
	svc = proxyingMiddleware(*proxy, ctx, logger)(svc)
	svc = loggingMiddleware(logger)(svc)
	svc = instrumentingMiddleware(requestCount, requestLatency, countResult)(svc)

	uppercaseHandler := httptransport.NewServer(
		ctx,
		makeUppercaseEndpoint(svc),
		decodeUppercaseRequest,
		encodeResponse,
	)
	countHandler := httptransport.NewServer(
		ctx,
		makeCountEndpoint(svc),
		decodeCountRequest,
		encodeResponse,
	)

	http.Handle("/uppercase", uppercaseHandler)
	http.Handle("/count", countHandler)
	http.Handle("/metrics", stdprometheus.Handler())
	logger.Log("msg", "HTTP", "addr", *listen)
	logger.Log("err", http.ListenAndServe(*listen, nil))
}

// MakeHTTPHandler mounts the endpoints into a REST-y HTTP handler.
func MakeHTTPHandler(ctx context.Context, e Endpoints, imagePath string, logger log.Logger) http.Handler {
	r := mux.NewRouter().StrictSlash(false)
	options := []httptransport.ServerOption{
		httptransport.ServerErrorLogger(logger),
		httptransport.ServerErrorEncoder(encodeError),
	}

	// GET /catalogue       List
	// GET /catalogue/size  Count
	// GET /catalogue/{id}  Get
	// GET /tags            Tags
	// GET /health		Health Check

	r.Methods("GET").Path("/catalogue").Handler(httptransport.NewServer(
		ctx,
		e.ListEndpoint,
		decodeListRequest,
		encodeListResponse,
		options...,
	))
	r.Methods("GET").Path("/catalogue/size").Handler(httptransport.NewServer(
		ctx,
		e.CountEndpoint,
		decodeCountRequest,
		encodeResponse,
		options...,
	))
	r.Methods("GET").Path("/catalogue/{id}").Handler(httptransport.NewServer(
		ctx,
		e.GetEndpoint,
		decodeGetRequest,
		encodeGetResponse, // special case, this one can have an error
		options...,
	))
	r.Methods("GET").Path("/tags").Handler(httptransport.NewServer(
		ctx,
		e.TagsEndpoint,
		decodeTagsRequest,
		encodeResponse,
		options...,
	))
	r.Methods("GET").PathPrefix("/catalogue/images/").Handler(http.StripPrefix(
		"/catalogue/images/",
		http.FileServer(http.Dir(imagePath)),
	))
	r.Methods("GET").PathPrefix("/health").Handler(httptransport.NewServer(
		ctx,
		e.HealthEndpoint,
		decodeHealthRequest,
		encodeHealthResponse,
		options...,
	))
	r.Handle("/metrics", promhttp.Handler())
	return r
}

func main() {
	ctx := context.Background()
	logger := log.NewLogfmtLogger(os.Stderr)

	//Define metrics to be collected  for this service
	fieldKeys := []string{"method", "error"}
	requestCount := kitprometheus.NewCounter(stdprometheus.CounterOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "request_count",
		Help:      "Number of requests received.",
	}, fieldKeys)

	requestLatency := metrics.NewTimeHistogram(time.Microsecond, kitprometheus.NewSummary(stdprometheus.SummaryOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "request_latency_microseconds",
		Help:      "Total duration of requests in Microseconds.",
	}, fieldKeys))

	countResult := kitprometheus.NewSummary(stdprometheus.SummaryOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "count_result",
		Help:      "The result of eac count method",
	}, []string{})

	//Declare the string service
	var svc StringService
	svc = stringService{}
	svc = loggingMiddleware{logger, svc}
	svc = instrumentingMiddleware{requestCount, requestLatency, countResult, svc}

	//Declare and define a http server that exposes the string service to clients via httptransport
	uppercaseHandler := httptransport.NewServer(
		ctx,
		makeUppercaseEndpoint(svc),
		decodeUppercaseRequest,
		encodeResponse,
	)

	countHandler := httptransport.NewServer(
		ctx,
		makeCountEndpoint(svc),
		decodeCountRequest,
		encodeResponse,
	)

	//Define the content routes
	http.Handle("/uppercase", uppercaseHandler)
	http.Handle("/count", countHandler)
	http.Handle("/metrics", stdprometheus.Handler())
	logger.Log("msg", "HTTP", "addr", ":8080")
	logger.Log("err", http.ListenAndServe(":8080", nil))
}

func main() {
	ctx := context.Background()
	logger := log.NewLogfmtLogger(os.Stderr)

	fieldKeys := []string{"method", "error"}
	requestCount := kitprometheus.NewCounterFrom(stdprometheus.CounterOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "request_count",
		Help:      "Number of requests received.",
	}, fieldKeys)
	requestLatency := kitprometheus.NewSummaryFrom(stdprometheus.SummaryOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "request_latency_microseconds",
		Help:      "Total duration of requests in microseconds.",
	}, fieldKeys)
	countResult := kitprometheus.NewSummaryFrom(stdprometheus.SummaryOpts{
		Namespace: "my_group",
		Subsystem: "string_service",
		Name:      "count_result",
		Help:      "The result of each count method.",
	}, []string{}) // no fields here

	var svc StringService
	svc = stringService{}
	svc = loggingMiddleware{logger, svc}
	svc = instrumentingMiddleware{requestCount, requestLatency, countResult, svc}

	uppercaseHandler := httptransport.NewServer(
		ctx,
		makeUppercaseEndpoint(svc),
		decodeUppercaseRequest,
		encodeResponse,
	)

	countHandler := httptransport.NewServer(
		ctx,
		makeCountEndpoint(svc),
		decodeCountRequest,
		encodeResponse,
	)

	http.Handle("/uppercase", uppercaseHandler)
	http.Handle("/count", countHandler)
	http.Handle("/metrics", stdprometheus.Handler())
	logger.Log("msg", "HTTP", "addr", ":8080")
	logger.Log("err", http.ListenAndServe(":8080", nil))
}

func testServer(t *testing.T) (cancel, step func(), resp <-chan *http.Response) {
	var (
		ctx, cancelfn = context.WithCancel(context.Background())
		stepch        = make(chan bool)
		endpoint      = func(context.Context, interface{}) (interface{}, error) { <-stepch; return struct{}{}, nil }
		response      = make(chan *http.Response)
		handler       = httptransport.NewServer(
			ctx,
			endpoint,
			func(*http.Request) (interface{}, error) { return struct{}{}, nil },
			func(http.ResponseWriter, interface{}) error { return nil },
			httptransport.ServerBefore(func(ctx context.Context, r *http.Request) context.Context { return ctx }),
			httptransport.ServerAfter(func(ctx context.Context, w http.ResponseWriter) { return }),
		)
	)
	go func() {
		server := httptest.NewServer(handler)
		defer server.Close()
		resp, err := http.Get(server.URL)
		if err != nil {
			t.Error(err)
			return
		}
		response <- resp
	}()
	return cancelfn, func() { stepch <- true }, response
}

func main() {
	logger := log.NewLogfmtLogger(os.Stdout)

	ctx := context.Background()

	c := &countService{}

	var svc endpoint.Endpoint
	svc = makeAddEndpoint(c)

	limit := ratelimit.NewBucket(2*time.Second, 1)
	svc = kitratelimit.NewTokenBucketLimiter(limit)(svc)

	requestCount := expvar.NewCounter("request.count")
	svc = metricsMiddleware(requestCount)(svc)
	svc = loggingMiddlware(logger)(svc)

	addHandler := httptransport.NewServer(
		ctx,
		svc,
		decodeAddRequest,
		encodeResponse,
		httptransport.ServerBefore(beforeIDExtractor, beforePATHExtractor),
	)

	http.Handle("/add", addHandler)

	port := os.Getenv("PORT")
	logger.Log("listening on", port)
	if err := http.ListenAndServe(":"+port, nil); err != nil {
		logger.Log("listen.error", err)
	}
}

func main() {

	// setup a logger
	logger = log.NewLogfmtLogger(os.Stderr)
	logger = log.NewContext(logger).With("svc", "sensor").With("caller", log.DefaultCaller)

	// setup rethinkdb session
	session := getSession()

	// build the context
	ctx := context.Background()

	// new service
	svc := NewSensorService(session)

	// wrap it in the logging middleware
	svc = loggingMiddleware(logger)(svc)

	// bind the service to HTTP with the context
	// with it's matching encoder/decoder
	recordHandler := httptransport.NewServer(
		ctx,
		makeRecordEndpoint(svc),
		decodeRecordRequest,
		encodeResponse,
	)

	// assign an endpoint route
	http.Handle("/sensor/record", recordHandler)

	// bind the listener
	logger.Log("msg", "HTTP", "addr", ":5000")
	logger.Log("err", http.ListenAndServe(":5000", nil))
}

func servermain() {
	lib, nerr := glick.New(nil)
	if nerr != nil {
		panic(nerr)
	}
	if err := lib.RegAPI("api", uppercaseRequest{},
		func() interface{} { return uppercaseResponse{} }, time.Second); err != nil {
		panic(err)
	}
	if err := lib.RegPlugin("api", "lc",
		func(ctx context.Context, in interface{}) (interface{}, error) {
			return uppercaseResponse{
				V: strings.ToLower(in.(uppercaseRequest).S),
			}, nil
		}, nil); err != nil {
		panic(err)
	}

	ctx := context.Background()
	svc := stringService{}

	lowercaseHandler := httptransport.NewServer(
		ctx,
		glkit.MakeEndpoint(lib, "api", "lc"),
		decodeUppercaseRequest,
		encodeResponse,
	)

	uppercaseHandler := httptransport.NewServer(
		ctx,
		makeUppercaseEndpoint(svc),
		decodeUppercaseRequest,
		encodeResponse,
	)

	countHandler := httptransport.NewServer(
		ctx,
		makeCountEndpoint(svc),
		decodeCountRequest,
		encodeResponse,
	)

	http.Handle("/uppercase", uppercaseHandler)
	http.Handle("/lowercase", lowercaseHandler)
	http.Handle("/count", countHandler)
	log.Fatal(http.ListenAndServe("localhost:8080", nil))
}

func MakeSaveAllHandler(ctx context.Context) http.Handler {
	var saveallendpoint = MakeSaveAllEndpoint()
	saveallendpoint = authservice.RestrictedAccessMiddleware()(saveallendpoint)
	var typedrequest = new(http_req_res.ReqSaveAll)
	var saveallhandler = httptransport.NewServer(ctx, saveallendpoint, http_req_res.DecodeRequest(typedrequest), http_req_res.EncodeResponse)
	handler := http_req_res.CORS.Handler(saveallhandler)
	return handler
}

//Main
func main() {
	ctx := context.Background()
	svc := stringService{}

	uppercaseHandler := httptransport.NewServer(ctx,
		makeUppercaseEndpoint(svc),
		decodeUppercaseRequest,
		encodeResponse)

	countHandler := httptransport.NewServer(
		ctx, makeCountEndpoint(svc),
		decodeCountRequest,
		encodeResponse)

	http.Handle("/uppercase", uppercaseHandler)
	http.Handle("/count", countHandler)
	log.Fatal(http.ListenAndServe(":8080", nil))
}

// NewKitHandler create new kit handler
func NewKitHandler(ctx context.Context, ep *Endpoint) *kithttp.Server {
	return kithttp.NewServer(
		ctx,
		func(ctx context.Context, request interface{}) (interface{}, error) {
			return ep.Response(request.(*Request))
		},
		func(r *http.Request) (request interface{}, err error) {
			return service.KitJSONDecodeFunc(r, NewRequest())
		},
		service.KitJSONEncodeFunc,
	)
}

func createHealthCheckRouter(logger kitlog.Logger, ctx context.Context, healthCheckEndpoint endpoint.HealthCheckServicer) *mux.Router {
	router := mux.NewRouter()
	router.Handle("/healthcheck",
		kithttp.NewServer(
			ctx,
			healthCheckEndpoint.Run,
			func(context.Context, *http.Request) (interface{}, error) { return struct{}{}, nil },
			encodeHealthCheckHTTPResponse,
			kithttp.ServerErrorLogger(logger),
		)).Methods(getHTTPMethod)
	return router
}

func createApplicationRouter(logger kitlog.Logger, ctx context.Context, c *config.Configuration, sensorReadingsServicer endpoint.SensorReadingsServicer) *mux.Router {
	router := mux.NewRouter()
	router.Handle("/api/v1/sensor_readings",
		kithttp.NewServer(
			ctx,
			endpoint.VerifyAPIKey(c.APITokens)(sensorReadingsServicer.HandleMeasurementMessage),
			decodeSensorReadingsHTTPRequest,
			encodeSensorReadingsHTTPResponse,
			kithttp.ServerErrorEncoder(errorEncoder),
			kithttp.ServerErrorLogger(logger),
		)).Methods(postHTTPMethod)
	return router
}

// MakeHTTPHandler returns a handler that makes a set of endpoints available
// on predefined paths.
func MakeHTTPHandler(ctx context.Context, endpoints Endpoints, tracer stdopentracing.Tracer, logger log.Logger) http.Handler {
	options := []httptransport.ServerOption{
		httptransport.ServerErrorEncoder(errorEncoder),
		httptransport.ServerErrorLogger(logger),
	}
	m := http.NewServeMux()
	m.Handle("/sum", httptransport.NewServer(
		ctx,
		endpoints.SumEndpoint,
		DecodeHTTPSumRequest,
		EncodeHTTPGenericResponse,
		append(options, httptransport.ServerBefore(opentracing.FromHTTPRequest(tracer, "Sum", logger)))...,
	))
	m.Handle("/concat", httptransport.NewServer(
		ctx,
		endpoints.ConcatEndpoint,
		DecodeHTTPConcatRequest,
		EncodeHTTPGenericResponse,
		append(options, httptransport.ServerBefore(opentracing.FromHTTPRequest(tracer, "Concat", logger)))...,
	))
	return m
}