优化表结构，重构模型，重新实现基于白银网关的提取节点流程

web/services/proxy.go

@@ -0,0 +1,25 @@
+package services
+
+import (
+	m "platform/web/models"
+	q "platform/web/queries"
+	"time"
+)
+
+var Proxy = &proxyService{}
+
+type proxyService struct{}
+
+func (s *proxyService) AllProxies(proxyType m.ProxyType, channels bool) ([]*m.Proxy, error) {
+	proxies, err := q.Proxy.Where(
+		q.Proxy.Type.Eq(int(proxyType)),
+		q.Proxy.Status.Eq(int(m.ProxyStatusOnline)),
+	).Preload(
+		q.Proxy.Channels.On(q.Channel.ExpiredAt.Gte(time.Now())),
+	).Find()
+	if err != nil {
+		return nil, err
+	}
+
+	return proxies, nil
+}