dereference.go (2324B)
1 // GoToSocial 2 // Copyright (C) GoToSocial Authors admin@gotosocial.org 3 // SPDX-License-Identifier: AGPL-3.0-or-later 4 // 5 // This program is free software: you can redistribute it and/or modify 6 // it under the terms of the GNU Affero General Public License as published by 7 // the Free Software Foundation, either version 3 of the License, or 8 // (at your option) any later version. 9 // 10 // This program is distributed in the hope that it will be useful, 11 // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 // GNU Affero General Public License for more details. 14 // 15 // You should have received a copy of the GNU Affero General Public License 16 // along with this program. If not, see <http://www.gnu.org/licenses/>. 17 18 package transport 19 20 import ( 21 "context" 22 "io" 23 "net/http" 24 "net/url" 25 26 apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util" 27 "github.com/superseriousbusiness/gotosocial/internal/config" 28 "github.com/superseriousbusiness/gotosocial/internal/gtserror" 29 "github.com/superseriousbusiness/gotosocial/internal/uris" 30 ) 31 32 func (t *transport) Dereference(ctx context.Context, iri *url.URL) ([]byte, error) { 33 // if the request is to us, we can shortcut for certain URIs rather than going through 34 // the normal request flow, thereby saving time and energy 35 if iri.Host == config.GetHost() { 36 if uris.IsFollowersPath(iri) { 37 // the request is for followers of one of our accounts, which we can shortcut 38 return t.controller.dereferenceLocalFollowers(ctx, iri) 39 } 40 41 if uris.IsUserPath(iri) { 42 // the request is for one of our accounts, which we can shortcut 43 return t.controller.dereferenceLocalUser(ctx, iri) 44 } 45 } 46 47 // Build IRI just once 48 iriStr := iri.String() 49 50 // Prepare new HTTP request to endpoint 51 req, err := http.NewRequestWithContext(ctx, "GET", iriStr, nil) 52 if err != nil { 53 return nil, err 54 } 55 56 req.Header.Add("Accept", string(apiutil.AppActivityLDJSON)+","+string(apiutil.AppActivityJSON)) 57 req.Header.Add("Accept-Charset", "utf-8") 58 req.Header.Set("Host", iri.Host) 59 60 // Perform the HTTP request 61 rsp, err := t.GET(req) 62 if err != nil { 63 return nil, err 64 } 65 defer rsp.Body.Close() 66 67 if rsp.StatusCode != http.StatusOK { 68 return nil, gtserror.NewFromResponse(rsp) 69 } 70 71 return io.ReadAll(rsp.Body) 72 }