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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 web
import (
"context"
"net/http"
"net/url"
apimodel "code.superseriousbusiness.org/gotosocial/internal/api/model"
apiutil "code.superseriousbusiness.org/gotosocial/internal/api/util"
"code.superseriousbusiness.org/gotosocial/internal/gtserror"
"github.com/gin-gonic/gin"
)
// authorizeInteractionGETHandler handles redirects from remote
// (usually Mastodon) instances when a user tries to do a
// "remote interaction" and gives their GoToSocial account/domain.
// We use this handler instead of serving a generic 404 page.
func (m *Module) authorizeInteractionGETHandler(c *gin.Context) {
instance, errWithCode := m.processor.InstanceGetV1(c.Request.Context())
if errWithCode != nil {
apiutil.WebErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
return
}
// Return instance we already got from the db,
// don't try to fetch it again when erroring.
instanceGet := func(ctx context.Context) (*apimodel.InstanceV1, gtserror.WithCode) {
return instance, nil
}
// We only serve text/html at this endpoint.
if _, err := apiutil.NegotiateAccept(c, apiutil.TextHTML); err != nil {
apiutil.WebErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), instanceGet)
return
}
// Redirects to the "authorize_interaction"
// endpoint should contain the URI of the
// object that the user is trying to interact
// with in the 'uri' query param.
uriStr := c.Query("uri")
if uriStr == "" {
const text = "no uri query parameter found in string"
errWithCode := gtserror.NewWithCode(http.StatusNotFound, text)
apiutil.WebErrorHandler(c, errWithCode, instanceGet)
}
// Try to parse the object URI.
interactionURI, err := url.Parse(uriStr)
if err != nil {
err := gtserror.Newf("interaction URI could not be parsed: %w", err)
errWithCode := gtserror.NewErrorBadRequest(err, err.Error())
apiutil.WebErrorHandler(c, errWithCode, instanceGet)
}
page := apiutil.WebPage{
Template: "authorize-interaction.tmpl",
Instance: instance,
OGMeta: apiutil.OGBase(instance),
Stylesheets: []string{cssAbout},
Javascript: []apiutil.JavascriptEntry{
{
Src: jsFrontend,
Async: true,
Defer: true,
},
},
Extra: map[string]any{
"interactionURI": interactionURI,
},
}
apiutil.TemplateWebPage(c, page)
}
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