following.go (2330B)
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 users 19 20 import ( 21 "encoding/json" 22 "errors" 23 "net/http" 24 "strings" 25 26 "github.com/gin-gonic/gin" 27 apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util" 28 "github.com/superseriousbusiness/gotosocial/internal/gtserror" 29 ) 30 31 // FollowingGETHandler returns a collection of URIs for accounts that the target user follows, formatted so that other AP servers can understand it. 32 func (m *Module) FollowingGETHandler(c *gin.Context) { 33 // usernames on our instance are always lowercase 34 requestedUsername := strings.ToLower(c.Param(UsernameKey)) 35 if requestedUsername == "" { 36 err := errors.New("no username specified in request") 37 apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGetV1) 38 return 39 } 40 41 format, err := apiutil.NegotiateAccept(c, apiutil.HTMLOrActivityPubHeaders...) 42 if err != nil { 43 apiutil.ErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGetV1) 44 return 45 } 46 47 if format == string(apiutil.TextHTML) { 48 // This isn't an ActivityPub request; 49 // redirect to the user's profile. 50 c.Redirect(http.StatusSeeOther, "/@"+requestedUsername) 51 return 52 } 53 54 resp, errWithCode := m.processor.Fedi().FollowingGet(c.Request.Context(), requestedUsername) 55 if errWithCode != nil { 56 apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGetV1) 57 return 58 } 59 60 b, err := json.Marshal(resp) 61 if err != nil { 62 apiutil.ErrorHandler(c, gtserror.NewErrorInternalError(err), m.processor.InstanceGetV1) 63 return 64 } 65 66 c.Data(http.StatusOK, format, b) 67 }