fix(net): close of closed channel (#7529)

internal/net/request.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"github.com/alist-org/alist/v3/pkg/utils"
 	"io"
 	"math"
 	"net/http"
@@ -13,6 +12,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/alist-org/alist/v3/pkg/utils"
+
 	"github.com/alist-org/alist/v3/pkg/http_range"
 	"github.com/aws/aws-sdk-go/aws/awsutil"
 	log "github.com/sirupsen/logrus"
@@ -168,6 +169,9 @@ func (d *downloader) sendChunkTask() *chunk {
 
 // when the final reader Close, we interrupt
 func (d *downloader) interrupt() error {
+	if d.chunkChannel == nil {
+		return nil
+	}
 	d.cancel()
 	if d.written != d.params.Range.Length {
 		log.Debugf("Downloader interrupt before finish")
@@ -177,6 +181,7 @@ func (d *downloader) interrupt() error {
 	}
 	defer func() {
 		close(d.chunkChannel)
+		d.chunkChannel = nil
 		for _, buf := range d.bufs {
 			buf.Close()
 		}