更改项目名为NebulaShell

store/@{NebulaShell}/i18n/middleware.py

@@ -0,0 +1,90 @@
+"""i18n HTTP 中间件"""
+import json
+from typing import Optional, Callable
+from oss.plugin.types import Response
+
+
+class I18nMiddleware:
+    """i18n 中间件
+    
+    自动检测语言并注入到请求上下文
+    检测优先级:
+    1. URL 查询参数 ?lang=xx
+    2. Cookie locale=xx
+    3. Accept-Language 头
+    4. 默认语言
+    """
+
+    def __init__(self, engine, config: dict = None):
+        self.engine = engine
+        self.cookie_name = (config or {}).get("cookie_name", "locale")
+        self.query_param = (config or {}).get("query_param", "lang")
+
+    def handle(self, request: dict, next_fn: Callable) -> Response:
+        """处理请求
+        
+        1. 检测语言
+        2. 将语言注入到请求上下文
+        3. 调用下一个中间件/处理器
+        4. 可选: 在响应中添加 Content-Language 头
+        """
+        # 解析查询参数
+        query_lang = self._parse_query_param(request.get("query", ""))
+        
+        # 解析 Cookie
+        cookie_lang = self._parse_cookie(request.get("headers", {}))
+        
+        # 解析 Accept-Language
+        accept_language = request.get("headers", {}).get("Accept-Language", 
+                          request.get("headers", {}).get("accept-language", ""))
+        
+        # 检测语言
+        locale = self.engine.detect_locale(
+            accept_language=accept_language if accept_language else None,
+            query_lang=query_lang,
+            cookie_lang=cookie_lang
+        )
+        
+        # 设置当前语言
+        self.engine.set_locale(locale)
+        
+        # 注入到请求上下文
+        request["locale"] = locale
+        request["t"] = self.engine.t  # 提供翻译函数
+        
+        # 调用下一个处理器
+        response = next_fn()
+        
+        # 在响应中添加 Content-Language 头
+        if isinstance(response, Response):
+            response.headers["Content-Language"] = locale
+        
+        return response
+
+    def _parse_query_param(self, query_string: str) -> Optional[str]:
+        """从查询字符串解析语言参数"""
+        if not query_string:
+            return None
+        
+        # 解析 ?lang=xx 或 &lang=xx
+        params = {}
+        for param in query_string.lstrip("?").split("&"):
+            if "=" in param:
+                key, value = param.split("=", 1)
+                params[key.strip()] = value.strip()
+        
+        return params.get(self.query_param)
+
+    def _parse_cookie(self, headers: dict) -> Optional[str]:
+        """从 Cookie 解析语言参数"""
+        cookie_header = headers.get("Cookie", headers.get("cookie", ""))
+        if not cookie_header:
+            return None
+        
+        cookies = {}
+        for cookie in cookie_header.split(";"):
+            if "=" in cookie:
+                key, value = cookie.split("=", 1)
+                cookies[key.strip()] = value.strip()
+        
+        return cookies.get(self.cookie_name)