76 lines
2.1 KiB
Go
76 lines
2.1 KiB
Go
package resolver
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"regexp"
|
|
"time"
|
|
|
|
"github.com/FAU-CDI/wdresolve"
|
|
"github.com/FAU-CDI/wdresolve/resolvers"
|
|
"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
|
|
"github.com/FAU-CDI/wisski-distillery/internal/dis/component/instances"
|
|
"github.com/FAU-CDI/wisski-distillery/pkg/lazy"
|
|
)
|
|
|
|
type Resolver struct {
|
|
component.Base
|
|
|
|
Instances *instances.Instances
|
|
|
|
prefixes lazy.Lazy[map[string]string] // cached prefixes (from the server)
|
|
RefreshInterval time.Duration
|
|
|
|
handler lazy.Lazy[wdresolve.ResolveHandler] // handler
|
|
}
|
|
|
|
var (
|
|
_ component.Servable = (*Resolver)(nil)
|
|
)
|
|
|
|
func (resolver *Resolver) Routes() []string { return []string{"/go/", "/wisski/get/"} }
|
|
|
|
func (resolver *Resolver) Handler(ctx context.Context, route string, progress io.Writer) (http.Handler, error) {
|
|
var err error
|
|
return resolver.handler.Get(func() (p wdresolve.ResolveHandler) {
|
|
p.TrustXForwardedProto = true
|
|
|
|
fallback := &resolvers.Regexp{
|
|
Data: map[string]string{},
|
|
}
|
|
|
|
// handle the default domain name!
|
|
domainName := resolver.Config.DefaultDomain
|
|
if domainName != "" {
|
|
fallback.Data[fmt.Sprintf("^https?://(.*)\\.%s", regexp.QuoteMeta(domainName))] = fmt.Sprintf("https://$1.%s", domainName)
|
|
fmt.Fprintf(progress, "registering default domain %s\n", domainName)
|
|
}
|
|
|
|
// handle the extra domains!
|
|
for _, domain := range resolver.Config.SelfExtraDomains {
|
|
fallback.Data[fmt.Sprintf("^https?://(.*)\\.%s", regexp.QuoteMeta(domain))] = fmt.Sprintf("https://$1.%s", domainName)
|
|
fmt.Fprintf(progress, "registering legacy domain %s\n", domain)
|
|
}
|
|
|
|
// start updating prefixes
|
|
resolver.updatePrefixes(ctx, progress)
|
|
|
|
// resolve the prefixes
|
|
p.Resolver = resolvers.InOrder{
|
|
resolver,
|
|
fallback,
|
|
}
|
|
return p
|
|
}), err
|
|
}
|
|
|
|
func (resolver *Resolver) Target(uri string) string {
|
|
return wdresolve.PrefixTarget(resolver, uri)
|
|
}
|
|
|
|
// Prefixes returns a cached list of prefixes
|
|
func (resolver *Resolver) Prefixes() (prefixes map[string]string) {
|
|
return resolver.prefixes.Get(nil) // by precondition there always is a cached value
|
|
}
|