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56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package httpclient
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import (
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"net/http"
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"time"
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"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
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)
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// SignFunc is a function signature that provides request signing.
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type SignFunc func(r *http.Request) error
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// signingtransport wraps an http.Transport{}
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// (RoundTripper implementer) to check request
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// context for a signing function and using for
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// all subsequent trips through RoundTrip().
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type signingtransport struct{ http.Transport }
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func (t *signingtransport) RoundTrip(r *http.Request) (*http.Response, error) {
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// Ensure updated host always set.
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r.Header.Set("Host", r.URL.Host)
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if sign := gtscontext.HTTPClientSignFunc(r.Context()); sign != nil {
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// Reset signing header fields
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now := time.Now().UTC()
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r.Header.Set("Date", now.Format("Mon, 02 Jan 2006 15:04:05")+" GMT")
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r.Header.Del("Signature")
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r.Header.Del("Digest")
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// Sign the outgoing request.
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if err := sign(r); err != nil {
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return nil, err
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}
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}
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// Pass to underlying transport.
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return t.Transport.RoundTrip(r)
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}
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