70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
package realdebrid
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import (
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"math"
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"net/http"
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"strings"
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"time"
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)
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func (rd *RealDebrid) UnrestrictUntilOk(link string) *UnrestrictResponse {
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unrestrictFn := func() (*UnrestrictResponse, error) {
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return rd.UnrestrictLink(link)
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}
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return retryUntilOk(unrestrictFn)
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}
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func retryUntilOk[T any](fn func() (T, error)) T {
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const initialDelay = 1 * time.Second
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const maxDelay = 128 * time.Second
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for i := 0; ; i++ {
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result, err := fn()
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if err == nil || !strings.Contains(err.Error(), "429") {
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return result
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}
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delay := time.Duration(math.Min(float64(initialDelay*time.Duration(math.Pow(2, float64(i)))), float64(maxDelay)))
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time.Sleep(delay)
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}
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}
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func canFetchFirstByte(url string) bool {
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const maxAttempts = 3
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for i := 0; i < maxAttempts; i++ {
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// Create a new HTTP request
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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continue
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}
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// Set the Range header to request only the first byte
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req.Header.Set("Range", "bytes=0-0")
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// Execute the request
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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time.Sleep(1 * time.Second) // Add a delay before the next retry
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continue
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}
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defer resp.Body.Close()
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// If server supports partial content
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if resp.StatusCode == http.StatusPartialContent {
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buffer := make([]byte, 1)
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_, err := resp.Body.Read(buffer)
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if err == nil {
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return true
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}
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} else if resp.StatusCode == http.StatusOK {
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// If server doesn't support partial content, try reading the first byte and immediately close
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buffer := make([]byte, 1)
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_, err = resp.Body.Read(buffer)
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if err == nil {
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return true
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}
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}
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time.Sleep(1 * time.Second) // Add a delay before the next retry
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}
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return false
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}
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