// URLQuery is a middleware to parse the URL Query parameters just once,
// and store the resulting url.Values in the context.
func URLQuery(c *web.C, h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
if c.Env == nil {
c.Env = make(map[interface{}]interface{})
}
c.Env[URLQueryKey] = r.URL.Query()
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
// 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 RequestID(c *web.C, h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
if c.Env == nil {
c.Env = make(map[interface{}]interface{})
}
myid := atomic.AddUint64(&reqid, 1)
c.Env[RequestIDKey] = fmt.Sprintf("%s-%06d", prefix, myid)
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}