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Monorepo for Tangled
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5.3 kB · 221 lines
Go
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import ( "context" _ "embed" "fmt" "log/slog" "net/http" "strings" "sync"
"github.com/go-chi/chi/v5" "tangled.org/core/idresolver" "tangled.org/core/jetstream" "tangled.org/core/knotserver/config" "tangled.org/core/knotserver/db" "tangled.org/core/knotserver/xrpc" "tangled.org/core/log" "tangled.org/core/notifier" "tangled.org/core/rbac" "tangled.org/core/xrpc/serviceauth")
//go:embed motdvar defaultMotd []byte
type Knot struct { c *config.Config db *db.DB jc *jetstream.JetstreamClient e *rbac.Enforcer l *slog.Logger n *notifier.Notifier resolver *idresolver.Resolver motd []byte motdMu sync.RWMutex}
func Setup(ctx context.Context, c *config.Config, db *db.DB, e *rbac.Enforcer, jc *jetstream.JetstreamClient, n *notifier.Notifier, resolver *idresolver.Resolver) (http.Handler, error) { h := Knot{ c: c, db: db, e: e, l: log.FromContext(ctx), jc: jc, n: n, resolver: resolver, motd: defaultMotd, }
err := e.AddKnot(rbac.ThisServer) if err != nil { return nil, fmt.Errorf("failed to setup enforcer: %w", err) }
// configure owner if err = h.configureOwner(ctx); err != nil { return nil, err } h.l.Info("owner set", "did", h.c.Server.Owner) h.jc.AddDid(h.c.Server.Owner)
// configure known-dids in jetstream consumer dids, err := h.db.GetAllDids() if err != nil { return nil, fmt.Errorf("failed to get all dids: %w", err) } for _, d := range dids { jc.AddDid(d) }
err = h.jc.StartJetstream(ctx, h.processMessages) if err != nil { return nil, fmt.Errorf("failed to start jetstream: %w", err) }
return h.Router(), nil}
func (h *Knot) Router() http.Handler { r := chi.NewRouter()
r.Use(h.CORS) r.Use(h.RequestLogger)
r.Get("/", func(w http.ResponseWriter, r *http.Request) { w.Write(h.GetMotdContent()) })
r.Route("/{did}", func(r chi.Router) { r.Use(h.resolveDidRedirect)
r.Get("/info/refs", h.InfoRefs) r.Post("/git-upload-archive", h.UploadArchive) r.Post("/git-upload-pack", h.UploadPack) r.Post("/git-receive-pack", h.ReceivePack)
r.Route("/{name}", func(r chi.Router) { r.Get("/info/refs", h.InfoRefs) r.Post("/git-upload-archive", h.UploadArchive) r.Post("/git-upload-pack", h.UploadPack) r.Post("/git-receive-pack", h.ReceivePack) }) })
// xrpc apis r.Mount("/xrpc", h.XrpcRouter())
// Socket that streams git oplogs r.Get("/events", h.Events)
return r}
// SetMotdContent sets custom MOTD content, replacing the embedded default.func (h *Knot) SetMotdContent(content []byte) { h.motdMu.Lock() defer h.motdMu.Unlock() h.motd = content}
// GetMotdContent returns the current MOTD content.func (h *Knot) GetMotdContent() []byte { h.motdMu.RLock() defer h.motdMu.RUnlock() return h.motd}
func (h *Knot) XrpcRouter() http.Handler { serviceAuth := serviceauth.NewServiceAuth(h.l, h.resolver, h.c.Server.Did().String())
l := log.SubLogger(h.l, "xrpc")
xrpc := &xrpc.Xrpc{ Config: h.c, Db: h.db, Ingester: h.jc, Enforcer: h.e, Logger: l, Notifier: h.n, Resolver: h.resolver, ServiceAuth: serviceAuth, }
return xrpc.Router()}
func (h *Knot) resolveDidRedirect(next http.Handler) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { didOrHandle := chi.URLParam(r, "did") if strings.HasPrefix(didOrHandle, "did:") { next.ServeHTTP(w, r) return }
trimmed := strings.TrimPrefix(didOrHandle, "@") id, err := h.resolver.ResolveIdent(r.Context(), trimmed) if err != nil { // invalid did or handle h.l.Error("failed to resolve did/handle", "handle", trimmed, "err", err) http.Error(w, fmt.Sprintf("failed to resolve did/handle: %s", trimmed), http.StatusInternalServerError) return }
suffix := strings.TrimPrefix(r.URL.Path, "/"+didOrHandle) newPath := "/" + id.DID.String() + suffix if r.URL.RawQuery != "" { newPath += "?" + r.URL.RawQuery } http.Redirect(w, r, newPath, http.StatusTemporaryRedirect) })}
func (h *Knot) configureOwner(ctx context.Context) error { cfgOwner := h.c.Server.Owner
rbacDomain := "thisserver"
existing, err := h.e.GetKnotUsersByRole("server:owner", rbacDomain) if err != nil { return err }
switch len(existing) { case 0: // no owner configured, continue case 1: // find existing owner existingOwner := existing[0]
// no ownership change, this is okay if existingOwner == h.c.Server.Owner { break }
// remove existing owner if err = db.RemoveDid(h.db, existingOwner); err != nil { return err } if err = h.e.RemoveKnotOwner(rbacDomain, existingOwner); err != nil { return err }
default: return fmt.Errorf("more than one owner in DB, try deleting %q and starting over", h.c.Server.DBPath) }
if err = db.AddDid(h.db, cfgOwner); err != nil { return fmt.Errorf("failed to add owner to DB: %w", err) } if err := h.e.AddKnotOwner(rbacDomain, cfgOwner); err != nil { return fmt.Errorf("failed to add owner to RBAC: %w", err) }
err = h.fetchAndAddKeys(ctx, cfgOwner) if err != nil { h.l.Error("fetching and adding owners public keys", "error", err, "did", cfgOwner) }
return nil}