52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
package main
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import (
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"context"
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"fmt"
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"net/http"
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"time"
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)
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func waitForWireGuard(ctx context.Context, endpoint string, timeout time.Duration) error {
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ctx, cancel := context.WithTimeout(ctx, timeout)
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defer cancel()
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transport := &http.Transport{}
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defer transport.CloseIdleConnections()
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client := &http.Client{
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Transport: transport,
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Timeout: 5 * time.Second,
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CheckRedirect: func(_ *http.Request, _ []*http.Request) error {
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return http.ErrUseLastResponse
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},
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}
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ticker := time.NewTicker(2 * time.Second)
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defer ticker.Stop()
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for {
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if err := probeWireGuard(ctx, client, endpoint); err == nil {
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return nil
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} else {
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select {
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case <-ctx.Done():
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return fmt.Errorf("%w: %v", ctx.Err(), err)
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case <-ticker.C:
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}
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}
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}
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}
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func probeWireGuard(ctx context.Context, client *http.Client, endpoint string) error {
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request, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
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if err != nil {
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return err
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}
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response, err := client.Do(request)
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if err != nil {
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return err
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}
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defer func() { _ = response.Body.Close() }()
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// The relay proxy fetches this response live from the OCI WireGuard address.
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if response.StatusCode != http.StatusOK {
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return fmt.Errorf("WireGuard endpoint returned HTTP %d", response.StatusCode)
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}
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return nil
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}
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