gotosocial/internal/api/s2s/user/common.go

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/*
GoToSocial
Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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 user
import (
"context"
"fmt"
"github.com/gin-gonic/gin"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// ActivityPubAcceptHeaders represents the Accept headers mentioned here:
// https://www.w3.org/TR/activitypub/#retrieving-objects
var ActivityPubAcceptHeaders = []string{
`application/activity+json`,
`application/ld+json; profile="https://www.w3.org/ns/activitystreams"`,
}
// transferContext transfers the signature verifier and signature from the gin context to the request context
func transferContext(c *gin.Context) context.Context {
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
signature, signed := c.Get(string(util.APRequestingPublicKeySignature))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeySignature, signature)
}
return ctx
}
func negotiateFormat(c *gin.Context) (string, error) {
format := c.NegotiateFormat(ActivityPubAcceptHeaders...)
if format == "" {
return "", fmt.Errorf("no format can be offered for Accept headers %s", c.Request.Header.Get("Accept"))
}
return format, nil
}