derefmedia.go (1621B)
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 "github.com/superseriousbusiness/gotosocial/internal/gtserror" 27 ) 28 29 func (t *transport) DereferenceMedia(ctx context.Context, iri *url.URL) (io.ReadCloser, int64, error) { 30 // Build IRI just once 31 iriStr := iri.String() 32 33 // Prepare HTTP request to this media's IRI 34 req, err := http.NewRequestWithContext(ctx, "GET", iriStr, nil) 35 if err != nil { 36 return nil, 0, err 37 } 38 req.Header.Add("Accept", "*/*") // we don't know what kind of media we're going to get here 39 req.Header.Set("Host", iri.Host) 40 41 // Perform the HTTP request 42 rsp, err := t.GET(req) 43 if err != nil { 44 return nil, 0, err 45 } 46 47 // Check for an expected status code 48 if rsp.StatusCode != http.StatusOK { 49 return nil, 0, gtserror.NewFromResponse(rsp) 50 } 51 52 return rsp.Body, rsp.ContentLength, nil 53 }