790 lines
20 kB
1
package state
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import (
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"context"
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"crypto/hmac"
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"crypto/sha256"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"log"
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"log/slog"
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"net/http"
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"strings"
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"time"
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comatproto "github.com/bluesky-social/indigo/api/atproto"
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"github.com/bluesky-social/indigo/atproto/syntax"
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lexutil "github.com/bluesky-social/indigo/lex/util"
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"github.com/bluesky-social/jetstream/pkg/models"
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securejoin "github.com/cyphar/filepath-securejoin"
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"github.com/go-chi/chi/v5"
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tangled "github.com/sotangled/tangled/api/tangled"
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"github.com/sotangled/tangled/appview"
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"github.com/sotangled/tangled/appview/auth"
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"github.com/sotangled/tangled/appview/db"
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"github.com/sotangled/tangled/appview/pages"
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"github.com/sotangled/tangled/jetstream"
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"github.com/sotangled/tangled/rbac"
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)
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type State struct {
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db *db.DB
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auth *auth.Auth
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enforcer *rbac.Enforcer
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tidClock *syntax.TIDClock
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pages *pages.Pages
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resolver *appview.Resolver
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jc *jetstream.JetstreamClient
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}
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func Make() (*State, error) {
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db, err := db.Make(appview.SqliteDbPath)
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if err != nil {
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return nil, err
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}
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auth, err := auth.Make()
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if err != nil {
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return nil, err
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}
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enforcer, err := rbac.NewEnforcer(appview.SqliteDbPath)
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if err != nil {
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return nil, err
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}
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clock := syntax.NewTIDClock(0)
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pgs := pages.NewPages()
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resolver := appview.NewResolver()
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jc, err := jetstream.NewJetstreamClient("appview", []string{tangled.GraphFollowNSID}, nil, slog.Default(), db, false)
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if err != nil {
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return nil, fmt.Errorf("failed to create jetstream client: %w", err)
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}
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err = jc.StartJetstream(context.Background(), func(ctx context.Context, e *models.Event) error {
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if e.Kind != models.EventKindCommit {
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return nil
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}
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did := e.Did
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fmt.Println("got event", e.Commit.Collection, e.Commit.RKey, e.Commit.Record)
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raw := json.RawMessage(e.Commit.Record)
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switch e.Commit.Collection {
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case tangled.GraphFollowNSID:
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record := tangled.GraphFollow{}
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err := json.Unmarshal(raw, &record)
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if err != nil {
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return err
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}
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err = db.AddFollow(did, record.Subject, e.Commit.RKey)
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if err != nil {
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return fmt.Errorf("failed to add follow to db: %w", err)
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}
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return db.UpdateLastTimeUs(e.TimeUS)
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}
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return nil
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})
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if err != nil {
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return nil, fmt.Errorf("failed to start jetstream watcher: %w", err)
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}
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state := &State{
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db,
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auth,
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enforcer,
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clock,
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pgs,
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resolver,
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jc,
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}
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return state, nil
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}
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func (s *State) TID() string {
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return s.tidClock.Next().String()
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}
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func (s *State) Login(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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switch r.Method {
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case http.MethodGet:
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err := s.pages.Login(w, pages.LoginParams{})
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if err != nil {
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log.Printf("rendering login page: %s", err)
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}
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return
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case http.MethodPost:
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handle := strings.TrimPrefix(r.FormValue("handle"), "@")
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appPassword := r.FormValue("app_password")
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resolved, err := s.resolver.ResolveIdent(ctx, handle)
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if err != nil {
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log.Println("failed to resolve handle:", err)
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s.pages.Notice(w, "login-msg", fmt.Sprintf("\"%s\" is an invalid handle.", handle))
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return
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}
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atSession, err := s.auth.CreateInitialSession(ctx, resolved, appPassword)
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if err != nil {
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s.pages.Notice(w, "login-msg", "Invalid handle or password.")
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return
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}
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sessionish := auth.CreateSessionWrapper{ServerCreateSession_Output: atSession}
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err = s.auth.StoreSession(r, w, &sessionish, resolved.PDSEndpoint())
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if err != nil {
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s.pages.Notice(w, "login-msg", "Failed to login, try again later.")
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return
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}
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log.Printf("successfully saved session for %s (%s)", atSession.Handle, atSession.Did)
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s.pages.HxRedirect(w, "/")
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return
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}
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}
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func (s *State) Logout(w http.ResponseWriter, r *http.Request) {
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s.auth.ClearSession(r, w)
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s.pages.HxRedirect(w, "/")
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}
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func (s *State) Timeline(w http.ResponseWriter, r *http.Request) {
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user := s.auth.GetUser(r)
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s.pages.Timeline(w, pages.TimelineParams{
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LoggedInUser: user,
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})
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return
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}
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// requires auth
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func (s *State) RegistrationKey(w http.ResponseWriter, r *http.Request) {
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switch r.Method {
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case http.MethodGet:
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// list open registrations under this did
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return
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case http.MethodPost:
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session, err := s.auth.Store.Get(r, appview.SessionName)
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if err != nil || session.IsNew {
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log.Println("unauthorized attempt to generate registration key")
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http.Error(w, "Forbidden", http.StatusUnauthorized)
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return
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}
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did := session.Values[appview.SessionDid].(string)
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// check if domain is valid url, and strip extra bits down to just host
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domain := r.FormValue("domain")
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if domain == "" {
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http.Error(w, "Invalid form", http.StatusBadRequest)
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return
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}
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key, err := s.db.GenerateRegistrationKey(domain, did)
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if err != nil {
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log.Println(err)
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http.Error(w, "unable to register this domain", http.StatusNotAcceptable)
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return
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}
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w.Write([]byte(key))
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}
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}
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func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
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user := chi.URLParam(r, "user")
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user = strings.TrimPrefix(user, "@")
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if user == "" {
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w.WriteHeader(http.StatusBadRequest)
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return
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}
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id, err := s.resolver.ResolveIdent(r.Context(), user)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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pubKeys, err := s.db.GetPublicKeys(id.DID.String())
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if err != nil {
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w.WriteHeader(http.StatusNotFound)
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return
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}
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if len(pubKeys) == 0 {
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w.WriteHeader(http.StatusNotFound)
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return
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}
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for _, k := range pubKeys {
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key := strings.TrimRight(k.Key, "\n")
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w.Write([]byte(fmt.Sprintln(key)))
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}
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}
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// create a signed request and check if a node responds to that
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func (s *State) InitKnotServer(w http.ResponseWriter, r *http.Request) {
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user := s.auth.GetUser(r)
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domain := chi.URLParam(r, "domain")
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if domain == "" {
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http.Error(w, "malformed url", http.StatusBadRequest)
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return
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}
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log.Println("checking ", domain)
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secret, err := s.db.GetRegistrationKey(domain)
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if err != nil {
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log.Printf("no key found for domain %s: %s\n", domain, err)
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return
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}
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client, err := NewSignedClient(domain, secret)
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if err != nil {
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log.Println("failed to create client to ", domain)
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}
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resp, err := client.Init(user.Did)
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if err != nil {
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w.Write([]byte("no dice"))
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log.Println("domain was unreachable after 5 seconds")
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return
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}
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if resp.StatusCode == http.StatusConflict {
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log.Println("status conflict", resp.StatusCode)
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w.Write([]byte("already registered, sorry!"))
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return
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}
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if resp.StatusCode != http.StatusNoContent {
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log.Println("status nok", resp.StatusCode)
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w.Write([]byte("no dice"))
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return
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}
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// verify response mac
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signature := resp.Header.Get("X-Signature")
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signatureBytes, err := hex.DecodeString(signature)
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if err != nil {
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return
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}
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expectedMac := hmac.New(sha256.New, []byte(secret))
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expectedMac.Write([]byte("ok"))
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if !hmac.Equal(expectedMac.Sum(nil), signatureBytes) {
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log.Printf("response body signature mismatch: %x\n", signatureBytes)
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return
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}
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// mark as registered
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err = s.db.Register(domain)
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if err != nil {
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log.Println("failed to register domain", err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// set permissions for this did as owner
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reg, err := s.db.RegistrationByDomain(domain)
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if err != nil {
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log.Println("failed to register domain", err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// add basic acls for this domain
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err = s.enforcer.AddDomain(domain)
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if err != nil {
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log.Println("failed to setup owner of domain", err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// add this did as owner of this domain
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err = s.enforcer.AddOwner(domain, reg.ByDid)
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if err != nil {
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log.Println("failed to setup owner of domain", err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Write([]byte("check success"))
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}
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func (s *State) KnotServerInfo(w http.ResponseWriter, r *http.Request) {
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domain := chi.URLParam(r, "domain")
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if domain == "" {
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http.Error(w, "malformed url", http.StatusBadRequest)
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return
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}
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user := s.auth.GetUser(r)
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reg, err := s.db.RegistrationByDomain(domain)
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if err != nil {
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w.Write([]byte("failed to pull up registration info"))
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return
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}
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var members []string
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if reg.Registered != nil {
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members, err = s.enforcer.GetUserByRole("server:member", domain)
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if err != nil {
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w.Write([]byte("failed to fetch member list"))
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return
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}
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}
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ok, err := s.enforcer.IsServerOwner(user.Did, domain)
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isOwner := err == nil && ok
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p := pages.KnotParams{
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LoggedInUser: user,
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Registration: reg,
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Members: members,
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IsOwner: isOwner,
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}
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s.pages.Knot(w, p)
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}
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// get knots registered by this user
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func (s *State) Knots(w http.ResponseWriter, r *http.Request) {
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// for now, this is just pubkeys
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user := s.auth.GetUser(r)
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registrations, err := s.db.RegistrationsByDid(user.Did)
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if err != nil {
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log.Println(err)
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}
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s.pages.Knots(w, pages.KnotsParams{
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LoggedInUser: user,
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Registrations: registrations,
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})
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}
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// list members of domain, requires auth and requires owner status
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func (s *State) ListMembers(w http.ResponseWriter, r *http.Request) {
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domain := chi.URLParam(r, "domain")
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if domain == "" {
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http.Error(w, "malformed url", http.StatusBadRequest)
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return
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}
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// list all members for this domain
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memberDids, err := s.enforcer.GetUserByRole("server:member", domain)
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if err != nil {
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w.Write([]byte("failed to fetch member list"))
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return
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}
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w.Write([]byte(strings.Join(memberDids, "\n")))
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return
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}
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// add member to domain, requires auth and requires invite access
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func (s *State) AddMember(w http.ResponseWriter, r *http.Request) {
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domain := chi.URLParam(r, "domain")
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if domain == "" {
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http.Error(w, "malformed url", http.StatusBadRequest)
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return
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}
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memberDid := r.FormValue("member")
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if memberDid == "" {
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http.Error(w, "malformed form", http.StatusBadRequest)
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return
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}
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memberIdent, err := s.resolver.ResolveIdent(r.Context(), memberDid)
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if err != nil {
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w.Write([]byte("failed to resolve member did to a handle"))
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return
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}
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log.Printf("adding %s to %s\n", memberIdent.Handle.String(), domain)
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// announce this relation into the firehose, store into owners' pds
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client, _ := s.auth.AuthorizedClient(r)
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currentUser := s.auth.GetUser(r)
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addedAt := time.Now().Format(time.RFC3339)
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resp, err := comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{
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Collection: tangled.KnotMemberNSID,
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Repo: currentUser.Did,
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Rkey: s.TID(),
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Record: &lexutil.LexiconTypeDecoder{
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Val: &tangled.KnotMember{
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Member: memberIdent.DID.String(),
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Domain: domain,
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AddedAt: &addedAt,
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}},
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})
431
432
// invalid record
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if err != nil {
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log.Printf("failed to create record: %s", err)
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return
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}
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log.Println("created atproto record: ", resp.Uri)
438
439
secret, err := s.db.GetRegistrationKey(domain)
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if err != nil {
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log.Printf("no key found for domain %s: %s\n", domain, err)
442
return
443
}
444
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ksClient, err := NewSignedClient(domain, secret)
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if err != nil {
447
log.Println("failed to create client to ", domain)
448
return
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}
450
451
ksResp, err := ksClient.AddMember(memberIdent.DID.String())
452
if err != nil {
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log.Printf("failed to make request to %s: %s", domain, err)
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return
455
}
456
457
if ksResp.StatusCode != http.StatusNoContent {
458
w.Write([]byte(fmt.Sprint("knotserver failed to add member: ", err)))
459
return
460
}
461
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err = s.enforcer.AddMember(domain, memberIdent.DID.String())
463
if err != nil {
464
w.Write([]byte(fmt.Sprint("failed to add member: ", err)))
465
return
466
}
467
468
w.Write([]byte(fmt.Sprint("added member: ", memberIdent.Handle.String())))
469
}
470
471
func (s *State) RemoveMember(w http.ResponseWriter, r *http.Request) {
472
}
473
474
func (s *State) AddRepo(w http.ResponseWriter, r *http.Request) {
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switch r.Method {
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case http.MethodGet:
477
user := s.auth.GetUser(r)
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knots, err := s.enforcer.GetDomainsForUser(user.Did)
479
480
if err != nil {
481
s.pages.Notice(w, "repo", "Invalid user account.")
482
return
483
}
484
485
s.pages.NewRepo(w, pages.NewRepoParams{
486
LoggedInUser: user,
487
Knots: knots,
488
})
489
case http.MethodPost:
490
user := s.auth.GetUser(r)
491
492
domain := r.FormValue("domain")
493
if domain == "" {
494
s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
495
return
496
}
497
498
repoName := r.FormValue("name")
499
if repoName == "" {
500
s.pages.Notice(w, "repo", "Invalid repo name.")
501
return
502
}
503
504
ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
505
if err != nil || !ok {
506
s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
507
return
508
}
509
510
secret, err := s.db.GetRegistrationKey(domain)
511
if err != nil {
512
s.pages.Notice(w, "repo", fmt.Sprintf("No registration key found for knot %s.", domain))
513
return
514
}
515
516
client, err := NewSignedClient(domain, secret)
517
if err != nil {
518
s.pages.Notice(w, "repo", "Failed to connect to knot server.")
519
return
520
}
521
522
resp, err := client.NewRepo(user.Did, repoName)
523
if err != nil {
524
s.pages.Notice(w, "repo", "Failed to create repository on knot server.")
525
return
526
}
527
528
switch resp.StatusCode {
529
case http.StatusConflict:
530
s.pages.Notice(w, "repo", "A repository with that name already exists.")
531
return
532
case http.StatusInternalServerError:
533
s.pages.Notice(w, "repo", "Failed to create repository on knot. Try again later.")
534
case http.StatusNoContent:
535
// continue
536
}
537
538
// add to local db
539
repo := &db.Repo{
540
Did: user.Did,
541
Name: repoName,
542
Knot: domain,
543
}
544
err = s.db.AddRepo(repo)
545
if err != nil {
546
s.pages.Notice(w, "repo", "Failed to save repository information.")
547
return
548
}
549
550
// acls
551
p, _ := securejoin.SecureJoin(user.Did, repoName)
552
err = s.enforcer.AddRepo(user.Did, domain, p)
553
if err != nil {
554
log.Println(err)
555
s.pages.Notice(w, "repo", "Failed to set up repository permissions.")
556
return
557
}
558
559
s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Handle, repoName))
560
return
561
}
562
}
563
564
func (s *State) ProfilePage(w http.ResponseWriter, r *http.Request) {
565
didOrHandle := chi.URLParam(r, "user")
566
if didOrHandle == "" {
567
http.Error(w, "Bad request", http.StatusBadRequest)
568
return
569
}
570
571
ident, err := s.resolver.ResolveIdent(r.Context(), didOrHandle)
572
if err != nil {
573
log.Printf("resolving identity: %s", err)
574
w.WriteHeader(http.StatusNotFound)
575
return
576
}
577
578
repos, err := s.db.GetAllReposByDid(ident.DID.String())
579
if err != nil {
580
log.Printf("getting repos for %s: %s", ident.DID.String(), err)
581
}
582
583
collaboratingRepos, err := s.db.CollaboratingIn(ident.DID.String())
584
if err != nil {
585
log.Printf("getting collaborating repos for %s: %s", ident.DID.String(), err)
586
}
587
588
s.pages.ProfilePage(w, pages.ProfilePageParams{
589
LoggedInUser: s.auth.GetUser(r),
590
UserDid: ident.DID.String(),
591
UserHandle: ident.Handle.String(),
592
Repos: repos,
593
CollaboratingRepos: collaboratingRepos,
594
})
595
}
596
597
func (s *State) Follow(w http.ResponseWriter, r *http.Request) {
598
currentUser := s.auth.GetUser(r)
599
600
subject := r.URL.Query().Get("subject")
601
if subject == "" {
602
log.Println("invalid form")
603
return
604
}
605
606
subjectIdent, err := s.resolver.ResolveIdent(r.Context(), subject)
607
if err != nil {
608
log.Println("failed to follow, invalid did")
609
}
610
611
if currentUser.Did == subjectIdent.DID.String() {
612
log.Println("cant follow or unfollow yourself")
613
return
614
}
615
616
client, _ := s.auth.AuthorizedClient(r)
617
618
switch r.Method {
619
case http.MethodPost:
620
createdAt := time.Now().Format(time.RFC3339)
621
rkey := s.TID()
622
resp, err := comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{
623
Collection: tangled.GraphFollowNSID,
624
Repo: currentUser.Did,
625
Rkey: rkey,
626
Record: &lexutil.LexiconTypeDecoder{
627
Val: &tangled.GraphFollow{
628
Subject: subjectIdent.DID.String(),
629
CreatedAt: createdAt,
630
}},
631
})
632
if err != nil {
633
log.Println("failed to create atproto record", err)
634
return
635
}
636
637
err = s.db.AddFollow(currentUser.Did, subjectIdent.DID.String(), rkey)
638
if err != nil {
639
log.Println("failed to follow", err)
640
return
641
}
642
643
log.Println("created atproto record: ", resp.Uri)
644
645
return
646
case http.MethodDelete:
647
// find the record in the db
648
649
follow, err := s.db.GetFollow(currentUser.Did, subjectIdent.DID.String())
650
if err != nil {
651
log.Println("failed to get follow relationship")
652
return
653
}
654
655
resp, err := comatproto.RepoDeleteRecord(r.Context(), client, &comatproto.RepoDeleteRecord_Input{
656
Collection: tangled.GraphFollowNSID,
657
Repo: currentUser.Did,
658
Rkey: follow.RKey,
659
})
660
661
log.Println(resp.Commit.Cid)
662
663
if err != nil {
664
log.Println("failed to unfollow")
665
return
666
}
667
668
err = s.db.DeleteFollow(currentUser.Did, subjectIdent.DID.String())
669
if err != nil {
670
log.Println("failed to delete follow from DB")
671
// this is not an issue, the firehose event might have already done this
672
}
673
674
w.WriteHeader(http.StatusNoContent)
675
return
676
}
677
678
}
679
680
func (s *State) Router() http.Handler {
681
router := chi.NewRouter()
682
683
router.HandleFunc("/*", func(w http.ResponseWriter, r *http.Request) {
684
pat := chi.URLParam(r, "*")
685
if strings.HasPrefix(pat, "did:") || strings.HasPrefix(pat, "@") {
686
s.UserRouter().ServeHTTP(w, r)
687
} else {
688
s.StandardRouter().ServeHTTP(w, r)
689
}
690
})
691
692
return router
693
}
694
695
func (s *State) UserRouter() http.Handler {
696
r := chi.NewRouter()
697
698
// strip @ from user
699
r.Use(StripLeadingAt)
700
701
r.With(ResolveIdent(s)).Route("/{user}", func(r chi.Router) {
702
r.Get("/", s.ProfilePage)
703
r.With(ResolveRepoKnot(s)).Route("/{repo}", func(r chi.Router) {
704
r.Get("/", s.RepoIndex)
705
r.Get("/log/{ref}", s.RepoLog)
706
r.Route("/tree/{ref}", func(r chi.Router) {
707
r.Get("/", s.RepoIndex)
708
r.Get("/*", s.RepoTree)
709
})
710
r.Get("/commit/{ref}", s.RepoCommit)
711
r.Get("/branches", s.RepoBranches)
712
r.Get("/tags", s.RepoTags)
713
r.Get("/blob/{ref}/*", s.RepoBlob)
714
715
// These routes get proxied to the knot
716
r.Get("/info/refs", s.InfoRefs)
717
r.Post("/git-upload-pack", s.UploadPack)
718
719
// settings routes, needs auth
720
r.Group(func(r chi.Router) {
721
r.With(RepoPermissionMiddleware(s, "repo:settings")).Route("/settings", func(r chi.Router) {
722
r.Get("/", s.RepoSettings)
723
r.With(RepoPermissionMiddleware(s, "repo:invite")).Put("/collaborator", s.AddCollaborator)
724
})
725
})
726
})
727
})
728
729
r.NotFound(func(w http.ResponseWriter, r *http.Request) {
730
s.pages.Error404(w)
731
})
732
733
return r
734
}
735
736
func (s *State) StandardRouter() http.Handler {
737
r := chi.NewRouter()
738
739
r.Handle("/static/*", s.pages.Static())
740
741
r.Get("/", s.Timeline)
742
743
r.Get("/logout", s.Logout)
744
745
r.Get("/login", s.Login)
746
r.Post("/login", s.Login)
747
748
r.Route("/knots", func(r chi.Router) {
749
r.Use(AuthMiddleware(s))
750
r.Get("/", s.Knots)
751
r.Post("/key", s.RegistrationKey)
752
753
r.Route("/{domain}", func(r chi.Router) {
754
r.Post("/init", s.InitKnotServer)
755
r.Get("/", s.KnotServerInfo)
756
r.Route("/member", func(r chi.Router) {
757
r.Use(RoleMiddleware(s, "server:owner"))
758
r.Get("/", s.ListMembers)
759
r.Put("/", s.AddMember)
760
r.Delete("/", s.RemoveMember)
761
})
762
})
763
})
764
765
r.Route("/repo", func(r chi.Router) {
766
r.Route("/new", func(r chi.Router) {
767
r.Get("/", s.AddRepo)
768
r.Post("/", s.AddRepo)
769
})
770
// r.Post("/import", s.ImportRepo)
771
})
772
773
r.With(AuthMiddleware(s)).Route("/follow", func(r chi.Router) {
774
r.Post("/", s.Follow)
775
r.Delete("/", s.Follow)
776
})
777
778
r.Route("/settings", func(r chi.Router) {
779
r.Use(AuthMiddleware(s))
780
r.Get("/", s.Settings)
781
r.Put("/keys", s.SettingsKeys)
782
})
783
784
r.Get("/keys/{user}", s.Keys)
785
786
r.NotFound(func(w http.ResponseWriter, r *http.Request) {
787
s.pages.Error404(w)
788
})
789
return r
790
}
791