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-rw-r--r--internal/httpclient/transport.go55
1 files changed, 55 insertions, 0 deletions
diff --git a/internal/httpclient/transport.go b/internal/httpclient/transport.go
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+++ b/internal/httpclient/transport.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 httpclient
+
+import (
+ "net/http"
+ "time"
+
+ "github.com/superseriousbusiness/gotosocial/internal/gtscontext"
+)
+
+// SignFunc is a function signature that provides request signing.
+type SignFunc func(r *http.Request) error
+
+// signingtransport wraps an http.Transport{}
+// (RoundTripper implementer) to check request
+// context for a signing function and using for
+// all subsequent trips through RoundTrip().
+type signingtransport struct{ http.Transport }
+
+func (t *signingtransport) RoundTrip(r *http.Request) (*http.Response, error) {
+ // Ensure updated host always set.
+ r.Header.Set("Host", r.URL.Host)
+
+ if sign := gtscontext.HTTPClientSignFunc(r.Context()); sign != nil {
+ // Reset signing header fields
+ now := time.Now().UTC()
+ r.Header.Set("Date", now.Format("Mon, 02 Jan 2006 15:04:05")+" GMT")
+ r.Header.Del("Signature")
+ r.Header.Del("Digest")
+
+ // Sign the outgoing request.
+ if err := sign(r); err != nil {
+ return nil, err
+ }
+ }
+
+ // Pass to underlying transport.
+ return t.Transport.RoundTrip(r)
+}