gotosocial/internal/api/auth/oob.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 auth
import (
"context"
"errors"
"fmt"
"github.com/gin-contrib/sessions"
"github.com/gin-gonic/gin"
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/oauth"
)
func (m *Module) OobHandler(c *gin.Context) {
instance, errWithCode := m.processor.InstanceGetV1(c.Request.Context())
if errWithCode != nil {
apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
return
}
instanceGet := func(ctx context.Context) (*apimodel.InstanceV1, gtserror.WithCode) {
return instance, nil
}
oobToken := c.Query("code")
if oobToken == "" {
err := errors.New("no 'code' query value provided in callback redirect")
apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error(), oauth.HelpfulAdvice), instanceGet)
return
}
s := sessions.Default(c)
errs := []string{}
scope, ok := s.Get(sessionScope).(string)
if !ok {
errs = append(errs, fmt.Sprintf("key %s was not found in session", sessionScope))
}
userID, ok := s.Get(sessionUserID).(string)
if !ok {
errs = append(errs, fmt.Sprintf("key %s was not found in session", sessionUserID))
}
if len(errs) != 0 {
errs = append(errs, oauth.HelpfulAdvice)
apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(errors.New("one or more missing keys on session during OobHandler"), errs...), m.processor.InstanceGetV1)
return
}
user, err := m.db.GetUserByID(c.Request.Context(), userID)
if err != nil {
m.clearSession(s)
safe := fmt.Sprintf("user with id %s could not be retrieved", userID)
var errWithCode gtserror.WithCode
if err == db.ErrNoEntries {
errWithCode = gtserror.NewErrorBadRequest(err, safe, oauth.HelpfulAdvice)
} else {
errWithCode = gtserror.NewErrorInternalError(err, safe, oauth.HelpfulAdvice)
}
apiutil.ErrorHandler(c, errWithCode, instanceGet)
return
}
acct, err := m.db.GetAccountByID(c.Request.Context(), user.AccountID)
if err != nil {
m.clearSession(s)
safe := fmt.Sprintf("account with id %s could not be retrieved", user.AccountID)
var errWithCode gtserror.WithCode
if err == db.ErrNoEntries {
errWithCode = gtserror.NewErrorBadRequest(err, safe, oauth.HelpfulAdvice)
} else {
errWithCode = gtserror.NewErrorInternalError(err, safe, oauth.HelpfulAdvice)
}
apiutil.ErrorHandler(c, errWithCode, instanceGet)
return
}
// we're done with the session now, so just clear it out
m.clearSession(s)
page := apiutil.WebPage{
Template: "oob.tmpl",
Instance: instance,
Extra: map[string]any{
"user": acct.Username,
"oobToken": oobToken,
"scope": scope,
},
}
apiutil.TemplateWebPage(c, page)
}