115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
package resolver
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import (
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"context"
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"fmt"
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"net/http"
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"regexp"
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"time"
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"github.com/FAU-CDI/wdresolve"
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"github.com/FAU-CDI/wdresolve/resolvers"
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"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
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"github.com/FAU-CDI/wisski-distillery/internal/dis/component/auth"
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"github.com/FAU-CDI/wisski-distillery/internal/dis/component/instances"
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"github.com/FAU-CDI/wisski-distillery/internal/dis/component/server/assets"
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"github.com/FAU-CDI/wisski-distillery/internal/dis/component/server/templates"
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"github.com/FAU-CDI/wisski-distillery/pkg/lazy"
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"github.com/rs/zerolog"
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_ "embed"
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)
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type Resolver struct {
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component.Base
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Dependencies struct {
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Instances *instances.Instances
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Templating *templates.Templating
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Auth *auth.Auth
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}
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prefixes lazy.Lazy[map[string]string] // cached prefixes (from the server)
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RefreshInterval time.Duration
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}
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var (
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_ component.Routeable = (*Resolver)(nil)
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_ component.Cronable = (*Resolver)(nil)
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)
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func (resolver *Resolver) Routes() component.Routes {
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return component.Routes{
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Prefix: "/wisski/get/",
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Aliases: []string{"/go/"},
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CSRF: false,
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MenuTitle: "Resolver",
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MenuPriority: component.MenuResolver,
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}
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}
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//go:embed "resolver.html"
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var resolverHTML []byte
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var resolverTemplate = templates.Parse[resolverContext]("resolver.html", resolverHTML, assets.AssetsDefault)
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type resolverContext struct {
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templates.BaseContext
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wdresolve.IndexContext
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}
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func (resolver *Resolver) HandleRoute(ctx context.Context, route string) (http.Handler, error) {
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tpl := resolverTemplate.Prepare(resolver.Dependencies.Templating, templates.BaseContextGaps{
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Crumbs: []component.MenuItem{
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{Title: "Resolver", Path: "/wisski/get/"},
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},
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})
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logger := zerolog.Ctx(ctx)
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var p wdresolve.ResolveHandler
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var err error
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p.HandleIndex = func(context wdresolve.IndexContext, w http.ResponseWriter, r *http.Request) {
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ctx := resolverContext{
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IndexContext: context,
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}
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if !resolver.Dependencies.Auth.Has(auth.User, r) {
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ctx.IndexContext.Prefixes = nil
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}
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tpl.Execute(w, r, ctx)
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}
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p.TrustXForwardedProto = true
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fallback := &resolvers.Regexp{
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Data: map[string]string{},
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}
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// handle the default domain name!
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domainName := resolver.Config.DefaultDomain
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if domainName != "" {
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fallback.Data[fmt.Sprintf("^https?://(.*)\\.%s", regexp.QuoteMeta(domainName))] = fmt.Sprintf("https://$1.%s", domainName)
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logger.Info().Str("name", domainName).Msg("registering default domain")
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}
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// handle the extra domains!
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for _, domain := range resolver.Config.SelfExtraDomains {
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fallback.Data[fmt.Sprintf("^https?://(.*)\\.%s", regexp.QuoteMeta(domain))] = fmt.Sprintf("https://$1.%s", domainName)
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logger.Info().Str("name", domainName).Msg("registering legacy domain")
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}
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// resolve the prefixes
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p.Resolver = resolvers.InOrder{
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resolver,
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fallback,
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}
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return p, err
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}
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func (resolver *Resolver) Target(uri string) string {
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return wdresolve.PrefixTarget(resolver, uri)
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}
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// Prefixes returns a cached list of prefixes
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func (resolver *Resolver) Prefixes() (prefixes map[string]string) {
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return resolver.prefixes.Get(nil) // by precondition there always is a cached value
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}
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