Documentation
¶
Index ¶
- Constants
- func CloseNotify(next chi.Handler) chi.Handler
- func Compress(level int, types ...string) func(next http.Handler) http.Handler
- func DefaultCompress(next http.Handler) http.Handler
- func GetReqID(ctx context.Context) string
- func Logger(next chi.Handler) chi.Handler
- func NoCache(h http.Handler) http.Handler
- func Profiler() http.Handler
- func RealIP(h http.Handler) http.Handler
- func Recoverer(next chi.Handler) chi.Handler
- func RedirectSlashes(next chi.Handler) chi.Handler
- func RequestID(next chi.Handler) chi.Handler
- func StripSlashes(next chi.Handler) chi.Handler
- func Throttle(limit int) func(chi.Handler) chi.Handler
- func ThrottleBacklog(limit int, backlogLimit int, backlogTimeout time.Duration) func(chi.Handler) chi.Handler
- func Timeout(timeout time.Duration) func(next chi.Handler) chi.Handler
Constants ¶
const RequestIDKey ctxKeyRequestID = 0
RequestIDKey is the key that holds th unique request ID in a request context.
const StatusClientClosedRequest = 499
StatusClientClosedRequest represents a 499 Client Closed Request (Nginx) HTTP status. See: https://en.wikipedia.org/wiki/List_of_HTTP_status_codes
Variables ¶
This section is empty.
Functions ¶
func CloseNotify ¶
CloseNotify is a middleware that cancels ctx when the underlying connection has gone away. It can be used to cancel long operations on the server when the client disconnects before the response is ready.
func Compress ¶
Compress is a middleware that compresses response body of a given content types to a data format based on Accept-Encoding request header. It uses a given compression level.
func DefaultCompress ¶
DefaultCompress is a middleware that compresses response body of predefined content types to a data format based on Accept-Encoding request header. It uses a default compression level.
func GetReqID ¶
GetReqID returns a request ID from the given context if one is present. Returns the empty string if a request ID cannot be found.
func Logger ¶
Logger is a middleware that logs the start and end of each request, along with some useful data about what was requested, what the response status was, and how long it took to return. When standard output is a TTY, Logger will print in color, otherwise it will print in black and white.
Logger prints a request ID if one is provided.
func NoCache ¶
NoCache is a simple piece of middleware that sets a number of HTTP headers to prevent a router (or subrouter) from being cached by an upstream proxy and/or client.
As per http://wiki.nginx.org/HttpProxyModule - NoCache sets:
Expires: Thu, 01 Jan 1970 00:00:00 UTC Cache-Control: no-cache, private, max-age=0 X-Accel-Expires: 0 Pragma: no-cache (for HTTP/1.0 proxies/clients)
func Profiler ¶
Profiler is a convenient subrouter used for mounting net/http/pprof. ie.
func MyService() http.Handler {
r := chi.NewRouter()
// ..middlewares
r.Mount("/debug", profiler.Router())
// ..routes
return r
}
func RealIP ¶
RealIP is a middleware that sets a http.Request's RemoteAddr to the results of parsing either the X-Forwarded-For header or the X-Real-IP header (in that order).
This middleware should be inserted fairly early in the middleware stack to ensure that subsequent layers (e.g., request loggers) which examine the RemoteAddr will see the intended value.
You should only use this middleware if you can trust the headers passed to you (in particular, the two headers this middleware uses), for example because you have placed a reverse proxy like HAProxy or nginx in front of Goji. If your reverse proxies are configured to pass along arbitrary header values from the client, or if you use this middleware without a reverse proxy, malicious clients will be able to make you very sad (or, depending on how you're using RemoteAddr, vulnerable to an attack of some sort).
func Recoverer ¶
Recoverer is a middleware that recovers from panics, logs the panic (and a backtrace), and returns a HTTP 500 (Internal Server Error) status if possible.
Recoverer prints a request ID if one is provided.
func RedirectSlashes ¶
RedirectSlashes is a middleware that will match request paths with a trailing slash and redirect to the same path, less the trailing slash.
func RequestID ¶
RequestID is a middleware that injects a request ID into the context of each request. A request ID is a string of the form "host.example.com/random-0001", where "random" is a base62 random string that uniquely identifies this go process, and where the last number is an atomically incremented request counter.
func StripSlashes ¶
StripSlashes is a middleware that will match request paths with a trailing slash, strip it from the path and continue routing through the mux, if a route matches, then it will serve the handler.
func Throttle ¶
Throttle is a middleware that limits number of currently processed requests at a time.
func ThrottleBacklog ¶
func ThrottleBacklog(limit int, backlogLimit int, backlogTimeout time.Duration) func(chi.Handler) chi.Handler
ThrottleBacklog is a middleware that limits number of currently processed requests at a time and provides a backlog for holding a finite number of pending requests.
func Timeout ¶
Timeout is a middleware that cancels ctx after a given timeout and return a 504 Gateway Timeout error to the client.
It's required that you select the ctx.Done() channel to check for the signal if the context has reached its deadline and return, otherwise the timeout signal will be just ignored.
ie. a route/handler may look like:
r.Get("/long", func(ctx context.Context, w http.ResponseWriter, r *http.Request) {
processTime := time.Duration(rand.Intn(4)+1) * time.Second
select {
case <-ctx.Done():
return
case <-time.After(processTime):
// The above channel simulates some hard work.
}
w.Write([]byte("done"))
})
Types ¶
This section is empty.
Source Files