feat: 强制使用IPv4发起订阅请求

handler/rss/parse.go

@@ -1,6 +1,7 @@
 package rss
 
 import (
+	"context"
 	"crypto/md5"
 	"encoding/xml"
 	"errors"
@@ -24,11 +25,28 @@ func createHTTPClient() *http.Client {
 		Timeout: 30 * time.Second,
 	}
 
+	// 创建强制使用IPv4的DialContext
+	dialContext := func(ctx context.Context, network, addr string) (net.Conn, error) {
+		// 强制使用IPv4
+		if network == "tcp" {
+			network = "tcp4"
+		}
+		dialer := &net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}
+		return dialer.DialContext(ctx, network, addr)
+	}
+
 	// 检查是否配置了代理
 	if config.ConfigManager.GetConfig().Management.ProxyAddr != "" {
 		proxyURL, err := url.Parse(config.ConfigManager.GetConfig().Management.ProxyAddr)
 		if err != nil {
 			log.Printf("解析代理地址失败: %v\n", err)
+			// 即使代理配置失败，也要使用IPv4
+			client.Transport = &http.Transport{
+				DialContext: dialContext,
+			}
 			return client
 		}
 
@@ -38,18 +56,32 @@ func createHTTPClient() *http.Client {
 			if err == nil {
 				client.Transport = &http.Transport{
 					Dial: func(network, addr string) (net.Conn, error) {
+						// 强制使用IPv4
+						if network == "tcp" {
+							network = "tcp4"
+						}
 						return dialer.Dial(network, addr)
 					},
 				}
 			} else {
 				log.Printf("创建SOCKS5代理失败: %v\n", err)
+				// 代理失败时使用IPv4直连
+				client.Transport = &http.Transport{
+					DialContext: dialContext,
+				}
 			}
 		} else {
 			log.Printf("使用HTTP/HTTPS代理: %s\n", proxyURL.Host)
 			client.Transport = &http.Transport{
-				Proxy: http.ProxyURL(proxyURL),
+				Proxy:       http.ProxyURL(proxyURL),
+				DialContext: dialContext,
 			}
 		}
+	} else {
+		// 没有代理时使用IPv4直连
+		client.Transport = &http.Transport{
+			DialContext: dialContext,
+		}
 	}
 
 	return client