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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"
"strconv"
"time"
"github.com/superseriousbusiness/gotosocial/internal/log"
)
const (
// starting backoff duration.
baseBackoff = 2 * time.Second
)
// Request wraps an HTTP request
// to add our own retry / backoff.
type Request struct {
// Current backoff dur.
backoff time.Duration
// Delivery attempts.
attempts uint
// log fields.
log.Entry
// underlying request.
*http.Request
}
// WrapRequest wraps an existing http.Request within
// our own httpclient.Request with retry / backoff tracking.
func WrapRequest(r *http.Request) *Request {
rr := new(Request)
rr.Request = r
entry := log.WithContext(r.Context())
entry = entry.WithField("method", r.Method)
entry = entry.WithField("url", r.URL.String())
if r.Body != nil {
// Only add content-type header if a request body exists.
entry = entry.WithField("contentType", r.Header.Get("Content-Type"))
}
entry = entry.WithField("attempt", uintPtr{&rr.attempts})
rr.Entry = entry
return rr
}
// GetBackOff returns the currently set backoff duration,
// (using a default according to no. attempts if needed).
func (r *Request) BackOff() time.Duration {
if r.backoff <= 0 {
// No backoff dur found, set our predefined
// backoff according to a multiplier of 2^n.
r.backoff = baseBackoff * 1 << (r.attempts + 1)
}
return r.backoff
}
type uintPtr struct{ u *uint }
func (f uintPtr) String() string {
if f.u == nil {
return "<nil>"
}
return strconv.FormatUint(uint64(*f.u), 10)
}
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