I'm running on HTTPS (port 10443) and use subroutes:
mainRoute := mux.NewRouter()
mainRoute.StrictSlash(true)
mainRoute.Handle("/", http.RedirectHandler("/static/", 302))
mainRoute.PathPrefix("/static/").Handler(http.StripPrefix("/static", *fh))
// Bind API Routes
apiRoute := mainRoute.PathPrefix("/api").Subrouter()
apiProductRoute := apiRoute.PathPrefix("/products").Subrouter()
apiProductRoute.Handle("/", handler(listProducts)).Methods("GET")
And the functions:
func listProducts(w http.ResponseWriter, r *http.Request) (interface{}, *handleHTTPError) {
vars := mux.Vars(r)
productType, ok := vars["id"]
log.Println(productType)
log.Println(ok)
}
ok is false and I have no idea why. I'm doing a simple ?type=model after my URL..
Answer
When you enter a URL like somedomain.com/products?type=model you're specifying a query string, not a variable.
Query strings in Go are accessed via r.URL.Query - e.g.
vals := r.URL.Query() // Returns a url.Values, which is a map[string][]string
productTypes, ok := vals["type"] // Note type, not ID. ID wasn't specified anywhere.
var pt string
if ok {
if len(productTypes) >= 1 {
pt = productTypes[0] // The first `?type=model`
}
}
As you can see, this can be a little clunky as it has to account for the map value being empty and for the possibility of a URL like somedomain.com/products?type=model&this=that&here=there&type=cat where a key can be specified more than once.
As per the gorilla/mux docs you can use route variables:
// List all products, or the latest
apiProductRoute.Handle("/", handler(listProducts)).Methods("GET")
// List a specific product
apiProductRoute.Handle("/{id}/", handler(showProduct)).Methods("GET")
This is where you would use mux.Vars:
vars := mux.Vars(request)
id := vars["id"]
Hope that helps clarify. I'd recommend the variables approach unless you specifically need to use query strings.