feat: support apk

internal/hubmodule/debian/hooks.go

@@ -0,0 +1,102 @@
+// Package debian defines hook behaviors for APT (Debian/Ubuntu) proxying.
+// 索引（Release/InRelease/Packages*）需要再验证；包体（pool/ 和 by-hash）视为不可变直接缓存。
+// 日志字段沿用通用 proxy（命中/上游状态），无需额外改写。
+package debian
+
+import (
+	"path"
+	"strings"
+
+	"github.com/any-hub/any-hub/internal/proxy/hooks"
+)
+
+func init() {
+	hooks.MustRegister("debian", hooks.Hooks{
+		NormalizePath: normalizePath,
+		CachePolicy:   cachePolicy,
+		ContentType:   contentType,
+	})
+}
+
+func normalizePath(_ *hooks.RequestContext, p string, rawQuery []byte) (string, []byte) {
+	clean := path.Clean("/" + strings.TrimSpace(p))
+	return clean, rawQuery
+}
+
+func cachePolicy(_ *hooks.RequestContext, locatorPath string, current hooks.CachePolicy) hooks.CachePolicy {
+	clean := canonicalPath(locatorPath)
+	switch {
+	case isAptIndexPath(clean):
+		// 索引类（Release/Packages）需要 If-None-Match/If-Modified-Since 再验证。
+		current.AllowCache = true
+		current.AllowStore = true
+		current.RequireRevalidate = true
+	case isAptImmutablePath(clean):
+		// pool/*.deb 与 by-hash 路径视为不可变，直接缓存后续不再 HEAD。
+		current.AllowCache = true
+		current.AllowStore = true
+		current.RequireRevalidate = false
+	default:
+		current.AllowCache = false
+		current.AllowStore = false
+		current.RequireRevalidate = false
+	}
+	return current
+}
+
+func contentType(_ *hooks.RequestContext, locatorPath string) string {
+	switch {
+	case strings.HasSuffix(locatorPath, ".gz"):
+		return "application/gzip"
+	case strings.HasSuffix(locatorPath, ".xz"):
+		return "application/x-xz"
+	case strings.HasSuffix(locatorPath, "Release.gpg"):
+		return "application/pgp-signature"
+	case isAptIndexPath(locatorPath):
+		return "text/plain"
+	default:
+		return ""
+	}
+}
+
+func isAptIndexPath(p string) bool {
+	clean := canonicalPath(p)
+	if isByHashPath(clean) {
+		return false
+	}
+	if strings.HasPrefix(clean, "/dists/") {
+		if strings.HasSuffix(clean, "/release") || strings.HasSuffix(clean, "/inrelease") || strings.HasSuffix(clean, "/release.gpg") {
+			return true
+		}
+		if strings.Contains(clean, "/packages") {
+			return true
+		}
+	}
+	return false
+}
+
+func isAptImmutablePath(p string) bool {
+	clean := canonicalPath(p)
+	if isByHashPath(clean) {
+		return true
+	}
+	if strings.HasPrefix(clean, "/pool/") {
+		return true
+	}
+	return false
+}
+
+func isByHashPath(p string) bool {
+	clean := canonicalPath(p)
+	if !strings.HasPrefix(clean, "/dists/") {
+		return false
+	}
+	return strings.Contains(clean, "/by-hash/")
+}
+
+func canonicalPath(p string) string {
+	if p == "" {
+		return "/"
+	}
+	return strings.ToLower(path.Clean("/" + strings.TrimSpace(p)))
+}