feat: Prism HTTP/SOCKS5 代理网关及管理台

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/cache/cache.go

@@ -0,0 +1,68 @@
+package cache
+
+import (
+	"sync"
+	"time"
+)
+
+type DashboardSnapshot struct {
+	UploadRate   int64 `json:"upload_rate"`
+	DownloadRate int64 `json:"download_rate"`
+	Connections  int   `json:"connections"`
+	TotalNodes   int   `json:"total_nodes"`
+	AliveNodes   int   `json:"alive_nodes"`
+	UpdatedAt    time.Time `json:"updated_at"`
+}
+
+type Cache struct {
+	mu           sync.RWMutex
+	lastYAML     []byte
+	dashboard    DashboardSnapshot
+	proxyLatency map[string]int
+}
+
+func New() *Cache {
+	return &Cache{
+		proxyLatency: make(map[string]int),
+	}
+}
+
+func (c *Cache) SetLastYAML(yaml []byte) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.lastYAML = append([]byte(nil), yaml...)
+}
+
+func (c *Cache) GetLastYAML() []byte {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	if c.lastYAML == nil {
+		return nil
+	}
+	return append([]byte(nil), c.lastYAML...)
+}
+
+func (c *Cache) SetDashboard(s DashboardSnapshot) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.dashboard = s
+}
+
+func (c *Cache) GetDashboard() DashboardSnapshot {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	return c.dashboard
+}
+
+func (c *Cache) SetProxyLatency(name string, ms int) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.proxyLatency[name] = ms
+}
+
+func (c *Cache) GetProxyLatency(name string) (int, bool) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	v, ok := c.proxyLatency[name]
+	return v, ok
+}