func main() {
mw := interpose.New()
// Turn on output buffering. It's added first because it encapsulates all other output.
// This enables headers to be written after data is sent, because they're all stored
// in a buffer, so the user's browser will see everything in the order it expects.
mw.Use(middleware.Buffer())
// Tell the browser our output will be JSON. Note that because this is added
// before the router, we will write JSON headers AFTER the router starts
// writing output to the browser! Usually this would mean that the header would
// not get set correctly. However, because we are buffering (see below),
// nothing will get sent to the browser until all output is finished rendering.
// This means that the header will get set correctly.
mw.Use(func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.Header().Set("Content-Type", "application/json")
next.ServeHTTP(w, req)
})
})
// Apply the router.
router := mux.NewRouter()
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page, %s!", mux.Vars(req)["user"])
})
mw.UseHandler(router)
// Launch and permit graceful shutdown, allowing up to 10 seconds for existing
// connections to end
graceful.Run(":3001", 10*time.Second, mw)
}
func main() {
middle := interpose.New()
// Tell the browser which server this came from.
// This modifies headers, so we want this to be called before
// any middleware which might modify the body (in HTTP, the headers cannot be
// modified after the body is modified)
middle.Use(func(next http.Handler) http.Handler {
return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
rw.Header().Set("X-Server-Name", "Interpose Test Server")
next.ServeHTTP(rw, req)
})
})
// Apply the router. By adding it last, all of our other middleware will be
// executed before the router, allowing us to modify headers before any
// output has been generated.
router := mux.NewRouter()
middle.UseHandler(router)
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page, %s!", mux.Vars(req)["user"])
})
// Launch and permit graceful shutdown, allowing up to 10 seconds for existing
// connections to end
graceful.Run(":3001", 10*time.Second, middle)
}
func main() {
mw := interpose.New()
// Set a random integer everytime someone loads the page
mw.Use(context.ClearHandler)
mw.Use(func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
c := rand.Int()
fmt.Println("Setting ctx count to:", c)
context.Set(req, CountKey, c)
next.ServeHTTP(w, req)
})
})
// Apply the router.
router := mux.NewRouter()
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
c, ok := context.GetOk(req, CountKey)
if !ok {
fmt.Println("Get not ok")
}
fmt.Fprintf(w, "Welcome to the home page, %s!\nCount:%d", mux.Vars(req)["user"], c)
})
mw.UseHandler(router)
// Launch and permit graceful shutdown, allowing up to 10 seconds for existing
// connections to end
graceful.Run(":3001", 10*time.Second, mw)
}
func main() {
mw := interpose.New()
// Use unrolled's secure framework
// If you inspect the headers, you will see X-Frame-Options set to DENY
// Must be called before the router because it modifies HTTP headers
secureMiddleware := secure.New(secure.Options{
FrameDeny: true,
})
mw.Use(secureMiddleware.Handler)
// Apply the router. By adding it first, all of our other middleware will be
// executed before the router, allowing us to modify headers before any
// output has been generated.
router := mux.NewRouter()
mw.UseHandler(router)
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page, %s!", mux.Vars(req)["user"])
})
// Launch and permit graceful shutdown, allowing up to 10 seconds for existing
// connections to end
graceful.Run(":3001", 10*time.Second, mw)
}
func main() {
middle := interpose.New()
// First apply any middleware that will not write output to http body
// but which may (or may not) modify headers
middle.Use(middleware.GorillaLog())
// Now apply any middleware that might modify the http body. This permits the
// preceding middleware to alter headers
router := mux.NewRouter()
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page, %s!", mux.Vars(req)["user"])
})
middle.UseHandler(router)
http.ListenAndServe(":3001", middle)
}
func main() {
router := mux.NewRouter()
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page, %s!", mux.Vars(req)["user"])
})
middle := interpose.New()
// Use Martini-Auth, a Martini library for basic HTTP authentication
middle.Use(adaptors.FromMartini(auth.Basic("user", "basic")))
// Finally, add the router
middle.UseHandler(router)
// Now visit http://localhost:3001/guest and enter username "user"
// and password "basic"
http.ListenAndServe(":3001", middle)
}
func main() {
middle := interpose.New()
// First apply any middleware that will not write output to http body
// Log to stdout. Taken from Gorilla
middle.Use(middleware.GorillaLog())
// Gzip output that follows. Taken from Negroni
middle.Use(middleware.NegroniGzip(gzip.DefaultCompression))
// Now apply any middleware that modify the http body.
router := mux.NewRouter()
middle.UseHandler(router)
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page, %s!", mux.Vars(req)["user"])
})
http.ListenAndServe(":3001", middle)
}
func main() {
router := mux.NewRouter()
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page, %s!", mux.Vars(req)["user"])
})
mw := interpose.New()
// Use logrus
x := negroni.Handler(negronilogrus.NewMiddleware())
mw.Use(adaptors.FromNegroni(x))
// Apply the router. By adding it last, all of our other middleware will be
// executed before the router, allowing us to modify headers before any
// output has been generated.
mw.UseHandler(router)
// Launch and permit graceful shutdown, allowing up to 10 seconds for existing
// connections to end
graceful.Run(":3001", 10*time.Second, mw)
}
func main() {
mw := interpose.New()
// Tell the browser our output will be JSON
mw.Use(func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.Header().Set("Content-Type", "application/json")
next.ServeHTTP(w, req)
})
})
// Apply the router. Because HTTP requires that headers be modified before
// the body, the JSON header function must be added to the middleware stack
// before the router.
router := mux.NewRouter()
router.HandleFunc("/{user}", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page, %s!", mux.Vars(req)["user"])
})
mw.UseHandler(router)
// Launch and permit graceful shutdown, allowing up to 10 seconds for existing
// connections to end
graceful.Run(":3001", 10*time.Second, mw)
}
func welcomeHandler(rw http.ResponseWriter, req *http.Request) {
fmt.Fprintf(rw, "Welcome to the home page, %s", mux.Vars(req)["name"])
}
func main() {
middle := interpose.New()
// Create a middleware that yields a global counter that increments until
// the server is shut down. Note that this would actually require a mutex
// or a channel to be safe for concurrent use. Therefore, this example is
// unsafe.
middle.Use(context.ClearHandler)
middle.Use(func() func(http.Handler) http.Handler {
c := 0
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
c++
context.Set(req, CountKey, c)
next.ServeHTTP(w, req)
})
}
}())
// Apply the router.
router := mux.NewRouter()
router.HandleFunc("/test/{user}", func(w http.ResponseWriter, req *http.Request) {
c, ok := context.GetOk(req, CountKey)
if !ok {
fmt.Println("Context not ok")
}
fmt.Fprintf(w, "Hi %s, this is visit #%d to the site since the server was last rebooted.", mux.Vars(req)["user"], c)
})
middle.UseHandler(router)
http.ListenAndServe(":3001", middle)
}
