gotosocial/internal/processing/fedi/user.go

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// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package fedi
import (
"context"
"fmt"
"net/url"
2021-11-13 16:29:43 +00:00
"github.com/superseriousbusiness/activity/streams"
"github.com/superseriousbusiness/activity/streams/vocab"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/transport"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
// UserGet handles the getting of a fedi/activitypub representation of a user/account, performing appropriate authentication
// before returning a JSON serializable interface to the caller.
func (p *Processor) UserGet(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
// Get the instance-local account the request is referring to.
requestedAccount, err := p.state.DB.GetAccountByUsernameDomain(ctx, requestedUsername, "")
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
var requestedPerson vocab.ActivityStreamsPerson
if uris.IsPublicKeyPath(requestURL) {
// if it's a public key path, we don't need to authenticate but we'll only serve the bare minimum user profile needed for the public key
requestedPerson, err = p.tc.AccountToASMinimal(ctx, requestedAccount)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
} else {
// if it's any other path, we want to fully authenticate the request before we serve any data, and then we can serve a more complete profile
requestingAccountURI, errWithCode := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
if errWithCode != nil {
return nil, errWithCode
}
// if we're not already handshaking/dereferencing a remote account, dereference it now
if !p.federator.Handshaking(requestedUsername, requestingAccountURI) {
requestingAccount, err := p.federator.GetAccountByURI(
transport.WithFastfail(ctx), requestedUsername, requestingAccountURI, false,
)
if err != nil {
return nil, gtserror.NewErrorUnauthorized(err)
}
blocked, err := p.state.DB.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID, true)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if blocked {
return nil, gtserror.NewErrorUnauthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
}
}
requestedPerson, err = p.tc.AccountToAS(ctx, requestedAccount)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
}
data, err := streams.Serialize(requestedPerson)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}