76 lines
2.1 KiB
Go
76 lines
2.1 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/log"
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)
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const (
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// starting backoff duration.
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baseBackoff = 2 * time.Second
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)
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// Request wraps an HTTP request
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// to add our own retry / backoff.
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type Request struct {
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// Current backoff dur.
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backoff time.Duration
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// Delivery attempts.
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attempts uint
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// log fields.
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log.Entry
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// underlying request.
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*http.Request
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}
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// WrapRequest wraps an existing http.Request within
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// our own httpclient.Request with retry / backoff tracking.
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func WrapRequest(r *http.Request) *Request {
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rr := new(Request)
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rr.Request = r
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entry := log.WithContext(r.Context())
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entry = entry.WithField("method", r.Method)
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entry = entry.WithField("url", r.URL.String())
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if r.Body != nil {
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// Only add content-type header if a request body exists.
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entry = entry.WithField("contentType", r.Header.Get("Content-Type"))
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}
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// note our formatting library follows ptr values
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entry = entry.WithField("attempt", &rr.attempts)
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rr.Entry = entry
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return rr
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}
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// GetBackOff returns the currently set backoff duration,
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// (using a default according to no. attempts if needed).
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func (r *Request) BackOff() time.Duration {
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if r.backoff <= 0 {
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// No backoff dur found, set our predefined
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// backoff according to a multiplier of 2^n.
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r.backoff = baseBackoff * 1 << (r.attempts + 1)
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}
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return r.backoff
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}
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