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79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
// Copyright (c) 2021 Tulir Asokan
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package whatsmeow
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import (
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"context"
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"math/rand"
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"time"
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waBinary "go.mau.fi/whatsmeow/binary"
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"go.mau.fi/whatsmeow/types"
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"go.mau.fi/whatsmeow/types/events"
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)
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var (
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// KeepAliveResponseDeadline specifies the duration to wait for a response to websocket keepalive pings.
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KeepAliveResponseDeadline = 10 * time.Second
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// KeepAliveIntervalMin specifies the minimum interval for websocket keepalive pings.
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KeepAliveIntervalMin = 20 * time.Second
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// KeepAliveIntervalMax specifies the maximum interval for websocket keepalive pings.
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KeepAliveIntervalMax = 30 * time.Second
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)
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func (cli *Client) keepAliveLoop(ctx context.Context) {
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var lastSuccess time.Time
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var errorCount int
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for {
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interval := rand.Int63n(KeepAliveIntervalMax.Milliseconds()-KeepAliveIntervalMin.Milliseconds()) + KeepAliveIntervalMin.Milliseconds()
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select {
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case <-time.After(time.Duration(interval) * time.Millisecond):
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isSuccess, shouldContinue := cli.sendKeepAlive(ctx)
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if !shouldContinue {
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return
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} else if !isSuccess {
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errorCount++
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go cli.dispatchEvent(&events.KeepAliveTimeout{
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ErrorCount: errorCount,
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LastSuccess: lastSuccess,
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})
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} else {
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if errorCount > 0 {
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errorCount = 0
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go cli.dispatchEvent(&events.KeepAliveRestored{})
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}
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lastSuccess = time.Now()
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}
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case <-ctx.Done():
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return
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}
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}
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}
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func (cli *Client) sendKeepAlive(ctx context.Context) (isSuccess, shouldContinue bool) {
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respCh, err := cli.sendIQAsync(infoQuery{
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Namespace: "w:p",
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Type: "get",
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To: types.ServerJID,
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Content: []waBinary.Node{{Tag: "ping"}},
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})
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if err != nil {
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cli.Log.Warnf("Failed to send keepalive: %v", err)
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return false, true
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}
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select {
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case <-respCh:
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// All good
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return true, true
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case <-time.After(KeepAliveResponseDeadline):
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cli.Log.Warnf("Keepalive timed out")
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return false, true
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case <-ctx.Done():
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return false, false
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}
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}
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