72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
package api
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import (
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"net/http"
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"strings"
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"github.com/go-chi/chi/v5"
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)
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type HostBucketRouter struct {
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routes map[string]chi.Router
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bktParam string
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defaultRouter chi.Router
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}
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func NewHostBucketRouter(bktParam string) HostBucketRouter {
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return HostBucketRouter{
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routes: make(map[string]chi.Router),
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bktParam: bktParam,
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}
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}
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func (hr *HostBucketRouter) Default(router chi.Router) {
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hr.defaultRouter = router
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}
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func (hr HostBucketRouter) Map(host string, h chi.Router) {
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hr.routes[strings.ToLower(host)] = h
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}
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func (hr HostBucketRouter) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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bucket, domain := getBucketDomain(getHost(r))
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router, ok := hr.routes[strings.ToLower(domain)]
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if !ok {
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router = hr.defaultRouter
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if router == nil {
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http.Error(w, http.StatusText(404), 404)
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return
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}
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}
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if rctx := chi.RouteContext(r.Context()); rctx != nil && bucket != "" {
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rctx.URLParams.Add(hr.bktParam, bucket)
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}
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router.ServeHTTP(w, r)
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}
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func getBucketDomain(host string) (bucket string, domain string) {
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parts := strings.Split(host, ".")
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if len(parts) > 1 {
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return parts[0], strings.Join(parts[1:], ".")
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}
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return "", host
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}
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// getHost tries its best to return the request host.
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// According to section 14.23 of RFC 2616 the Host header
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// can include the port number if the default value of 80 is not used.
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func getHost(r *http.Request) string {
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host := r.Host
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if r.URL.IsAbs() {
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host = r.URL.Host
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}
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if i := strings.Index(host, ":"); i != -1 {
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host = host[:i]
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}
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return host
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}
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