func ExampleServer_errorHandling() {
// Custom error handling:
//
// Every Router can have its own error handler. In this example
// a custom error handler is set on the API sub router to handler
// all errors occured on the /api route.
//
// Note: it is also possible to overwrite the default error handler of
// the server.
server := goserv.NewServer()
server.Get("/error", func(w http.ResponseWriter, r *http.Request) {
err := fmt.Errorf("a server error")
goserv.Context(r).Error(err, http.StatusInternalServerError)
})
api := server.SubRouter("/api")
api.Get("/error", func(w http.ResponseWriter, r *http.Request) {
err := fmt.Errorf("a API error")
goserv.Context(r).Error(err, http.StatusInternalServerError)
})
// Handle errors occured on the API router.
api.ErrorHandler = func(w http.ResponseWriter, r *http.Request, err *goserv.ContextError) {
log.Printf("API Error: %s", err)
w.WriteHeader(err.Code)
goserv.WriteString(w, err.String())
}
log.Fatalln(server.Listen(":12345"))
}
func ExampleServer_context() {
// Share data between handlers:
//
// The middleware stores a shared value in the RequestContext under the name "shared".
// The GET handler is the next handler in line and retrieves the value from the
// context. Since a RequestContext can store arbitrary types a type assertion
// is necessary to get the value in it's real type.
server := goserv.NewServer()
server.Use(func(w http.ResponseWriter, r *http.Request) {
goserv.Context(r).Set("shared", "something to share")
})
server.Get("/", func(w http.ResponseWriter, r *http.Request) {
shared := goserv.Context(r).Get("shared").(string)
goserv.WriteString(w, shared)
})
log.Fatalln(server.Listen(":12345"))
}
func ExampleServer_simple() {
// A simple server example.
//
// First an access logging function is registered which gets invoked
// before the request is forwarded to the home handler. After that
// the home handler is registered which is the final handler writing
// a simple message to the response body.
//
// As a last step server.Listen is called to start listening for incoming
// requests.
server := goserv.NewServer()
server.Use(func(w http.ResponseWriter, r *http.Request) {
log.Printf("Access %s %s", r.Method, r.URL.String())
}).Get("/", func(w http.ResponseWriter, r *http.Request) {
goserv.WriteString(w, "Welcome Home")
})
log.Fatalln(server.Listen(":12345"))
}
