download: seek to start of file before retrying http request

tulir · crazycodezombie · commit 1b22e2353cd3 · 2024-09-30T08:49:16.000-04:00
diff --git a/download-to-file.go b/download-to-file.go
@@ -132,6 +132,10 @@ func (cli *Client) downloadPossiblyEncryptedMediaWithRetriesToFile(url string, c
 			retryDuration = retryafter.Parse(httpErr.Response.Header.Get("Retry-After"), retryDuration)
 		}
 		cli.Log.Warnf("Failed to download media due to network error: %v, retrying in %s...", err, retryDuration)
+		_, err = file.Seek(0, io.SeekStart)
+		if err != nil {
+			return nil, fmt.Errorf("failed to seek to start of file to retry download: %w", err)
+		}
 		time.Sleep(retryDuration)
 	}
 	return

Original file line number	Diff line number	Diff line change
`@@ -132,6 +132,10 @@ func (cli *Client) downloadPossiblyEncryptedMediaWithRetriesToFile(url string, c`
`132`	`132`	`retryDuration = retryafter.Parse(httpErr.Response.Header.Get("Retry-After"), retryDuration)`
`133`	`133`	`}`
`134`	`134`	`cli.Log.Warnf("Failed to download media due to network error: %v, retrying in %s...", err, retryDuration)`
	`135`	`+ _, err = file.Seek(0, io.SeekStart)`
	`136`	`+ if err != nil {`
	`137`	`+ return nil, fmt.Errorf("failed to seek to start of file to retry download: %w", err)`
	`138`	`+ }`
`135`	`139`	`time.Sleep(retryDuration)`
`136`	`140`	`}`
`137`	`141`	`return`