feat(model): enhance LoadFeed with timeout support and add tests

model/podcast.go

@@ -2,8 +2,9 @@
 package model
 
 import (
-	"errors"
+	"context"
 	"fmt"
+	"time"
 
 	"github.com/mmcdole/gofeed"
 )
@@ -59,16 +60,19 @@ type Podcast struct {
 	Medium Medium `json:"medium,omitempty"`
 }
 
-// LoadFeed 从URL加载播客RSS订阅
-func LoadFeed(url string) (*Podcast, error) {
-	fp := gofeed.NewParser()
-	feed, err := fp.ParseURL(url)
-	if err != nil {
-		return nil, fmt.Errorf("解析播客订阅失败: %w", err)
+// LoadFeed 从URL加载播客RSS订阅，timeout为超时时间，如果timeout<=0则使用默认值30秒
+func LoadFeed(url string, timeout time.Duration) (*Podcast, error) {
+	if timeout <= 0 {
+		timeout = 30 * time.Second
 	}
 
-	if feed == nil {
-		return nil, errors.New("解析播客订阅失败: 空订阅")
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+
+	fp := gofeed.NewParser()
+	feed, err := fp.ParseURLWithContext(url, ctx)
+	if err != nil {
+		return nil, fmt.Errorf("解析播客订阅失败: %w", err)
 	}
 
 	imageURL := ""