73 lines
2.7 KiB
Go
73 lines
2.7 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package federation
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"net/url"
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"strings"
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apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
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)
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func (f *federator) FingerRemoteAccount(ctx context.Context, requestingUsername string, targetUsername string, targetDomain string) (*url.URL, error) {
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if blocked, err := f.db.IsDomainBlocked(ctx, targetDomain); blocked || err != nil {
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return nil, fmt.Errorf("FingerRemoteAccount: domain %s is blocked", targetDomain)
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}
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t, err := f.transportController.NewTransportForUsername(ctx, requestingUsername)
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if err != nil {
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return nil, fmt.Errorf("FingerRemoteAccount: error getting transport for username %s while dereferencing @%s@%s: %s", requestingUsername, targetUsername, targetDomain, err)
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}
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b, err := t.Finger(ctx, targetUsername, targetDomain)
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if err != nil {
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return nil, fmt.Errorf("FingerRemoteAccount: error doing request on behalf of username %s while dereferencing @%s@%s: %s", requestingUsername, targetUsername, targetDomain, err)
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}
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resp := &apimodel.WellKnownResponse{}
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if err := json.Unmarshal(b, resp); err != nil {
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return nil, fmt.Errorf("FingerRemoteAccount: could not unmarshal server response as WebfingerAccountResponse on behalf of username %s while dereferencing @%s@%s: %s", requestingUsername, targetUsername, targetDomain, err)
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}
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if len(resp.Links) == 0 {
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return nil, fmt.Errorf("FingerRemoteAccount: no links found in webfinger response %s", string(b))
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}
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// look through the links for the first one that matches "application/activity+json", this is what we need
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for _, l := range resp.Links {
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if strings.EqualFold(l.Type, "application/activity+json") {
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if l.Href == "" || l.Rel != "self" {
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continue
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}
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accountURI, err := url.Parse(l.Href)
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if err != nil {
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return nil, fmt.Errorf("FingerRemoteAccount: couldn't parse url %s: %s", l.Href, err)
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}
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// found it!
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return accountURI, nil
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}
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}
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return nil, errors.New("FingerRemoteAccount: no match found in webfinger response")
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}
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