[fit] Add comprehensive HTTP client authentication support

.gitignore

@@ -7,4 +7,7 @@
 
 # Common
 target/
-build/
+build/
+
+# Claude Code local settings
+.claude/settings.local.json

examples/fit-example/07-http-client-proxy/AUTH_USAGE_GUIDE.md

@@ -0,0 +1,211 @@
+# HTTP Client Authentication Usage Guide
+
+本文档演示了 fit-framework HTTP 客户端代理系统中各种身份认证方式的使用方法。
+
+## 1. 概述
+
+`@RequestAuth` 注解提供了统一的身份认证解决方案，支持多种认证类型和应用级别：
+
+### 认证类型 (AuthType)
+- **BEARER**: Bearer Token 认证
+- **BASIC**: HTTP Basic 认证
+- **API_KEY**: API Key 认证（支持 Header、Query、Cookie）
+- **CUSTOM**: 自定义认证（通过 Provider）
+
+### 应用级别
+- **接口级别**: 应用于整个接口的所有方法
+- **方法级别**: 应用于特定方法（会覆盖接口级别）
+- **参数级别**: 通过方法参数动态设置（最高优先级）
+
+## 2. 静态认证配置
+
+### 2.1 Bearer Token 认证
+
+```java
+// 接口级别静态配置
+@RequestAuth(type = AuthType.BEARER, value = "your-static-token")
+public interface YourClient {
+
+    // 方法级别覆盖
+    @RequestAuth(type = AuthType.BEARER, value = "method-specific-token")
+    String someMethod();
+}
+```
+
+### 2.2 Basic 认证
+
+```java
+@RequestAuth(type = AuthType.BASIC, username = "admin", password = "secret")
+String basicAuthMethod();
+```
+
+### 2.3 API Key 认证
+
+```java
+// Header 中的 API Key
+@RequestAuth(type = AuthType.API_KEY, name = "X-API-Key", value = "your-api-key")
+String headerApiKeyMethod();
+
+// Query 参数中的 API Key
+@RequestAuth(type = AuthType.API_KEY, name = "api_key", value = "your-key", location = Source.QUERY)
+String queryApiKeyMethod();
+```
+
+## 3. 动态认证配置
+
+### 3.1 参数驱动的认证
+
+```java
+// 动态 Bearer Token
+String dynamicBearer(@RequestAuth(type = AuthType.BEARER) String token);
+
+// 动态 API Key
+String dynamicApiKey(@RequestAuth(type = AuthType.API_KEY, name = "X-Dynamic-Key") String apiKey);
+```
+
+### 3.2 Provider 模式
+
+#### 创建 Provider
+
+```java
+@Component
+public class DynamicTokenProvider implements AuthProvider {
+    @Override
+    public Authorization provide() {
+        // 从 TokenManager、缓存或其他来源获取 token
+        String token = TokenManager.getCurrentToken();
+        return Authorization.createBearer(token);
+    }
+}
+```
+
+#### 使用 Provider
+
+```java
+@RequestAuth(type = AuthType.BEARER, provider = DynamicTokenProvider.class)
+String providerBasedMethod();
+```
+
+## 4. 组合认证
+
+可以在不同级别同时应用多种认证：
+
+```java
+@HttpProxy
+@RequestAddress(protocol = "http", host = "localhost", port = "8080")
+// 接口级别：默认 API Key
+@RequestAuth(type = AuthType.API_KEY, name = "X-Service-Key", value = "service-key")
+public interface CombinedAuthClient {
+
+    // 方法级别：添加 Bearer Token（会与接口级别的 API Key 共存）
+    @RequestAuth(type = AuthType.BEARER, provider = TokenProvider.class)
+    String combinedAuth(
+        // 参数级别：用户上下文 API Key
+        @RequestAuth(type = AuthType.API_KEY, name = "X-User-Context") String userToken
+    );
+}
+```
+
+## 5. 完整示例
+
+### TestAuthClient 接口
+
+```java
+@HttpProxy
+@RequestAddress(protocol = "http", host = "localhost", port = "8080")
+@RequestMapping(path = "/http-server/auth")
+@RequestAuth(type = AuthType.API_KEY, name = "X-Service-Key", value = "service-default-key")
+public interface TestAuthClient {
+
+    // 1. 静态 Bearer Token
+    @GetMapping(path = "/bearer-static")
+    @RequestAuth(type = AuthType.BEARER, value = "static-bearer-token-12345")
+    String testBearerStatic();
+
+    // 2. 动态 Bearer Token
+    @GetMapping(path = "/bearer-dynamic")
+    String testBearerDynamic(@RequestAuth(type = AuthType.BEARER) String token);
+
+    // 3. Basic 认证
+    @GetMapping(path = "/basic-static")
+    @RequestAuth(type = AuthType.BASIC, username = "admin", password = "secret123")
+    String testBasicStatic();
+
+    // 4. Header API Key
+    @GetMapping(path = "/apikey-header-static")
+    @RequestAuth(type = AuthType.API_KEY, name = "X-API-Key", value = "static-api-key-67890")
+    String testApiKeyHeaderStatic();
+
+    // 5. Query API Key
+    @GetMapping(path = "/apikey-query-static")
+    @RequestAuth(type = AuthType.API_KEY, name = "api_key", value = "query-api-key-111", location = Source.QUERY)
+    String testApiKeyQueryStatic();
+
+    // 6. 动态 API Key
+    @GetMapping(path = "/apikey-dynamic")
+    String testApiKeyDynamic(@RequestAuth(type = AuthType.API_KEY, name = "X-Dynamic-Key") String apiKey);
+
+    // 7. Provider 模式
+    @GetMapping(path = "/dynamic-provider")
+    @RequestAuth(type = AuthType.BEARER, provider = DynamicTokenProvider.class)
+    String testDynamicProvider();
+
+    // 8. 自定义认证
+    @GetMapping(path = "/custom-provider")
+    @RequestAuth(type = AuthType.CUSTOM, provider = CustomSignatureProvider.class)
+    String testCustomProvider();
+
+    // 9. 组合认证
+    @GetMapping(path = "/combined-auth")
+    @RequestAuth(type = AuthType.BEARER, provider = DynamicTokenProvider.class)
+    String testCombinedAuth(@RequestAuth(type = AuthType.API_KEY, name = "X-User-Context") String userToken);
+}
+```
+
+## 6. 注意事项
+
+1. **优先级**: 参数级别 > 方法级别 > 接口级别
+2. **Provider**: 需要标记为 `@Component` 并在容器中可用
+3. **组合认证**: 不同级别的认证会叠加，相同级别的认证会覆盖
+4. **安全性**: 避免在代码中硬编码敏感信息，优先使用 Provider 模式
+
+## 7. 快速启动和测试
+
+### 启动应用
+
+本示例基于 FIT 框架，启动方式如下：
+
+```bash
+# 1. 编译整个项目（在 fit-framework 根目录）
+mvn clean install
+
+# 2. 启动服务器端
+# 方式一：在 IDEA 中运行 plugin-http-server 模块的 main 方法
+# 方式二：命令行运行 JAR 文件（编译后在 target 目录）
+java -jar plugin-http-server/target/plugin-http-server-*.jar
+```
+
+### 验证启动成功
+
+查看日志中是否包含以下信息：
+
+```
+[INFO] [main] [modelengine.fitframework.runtime.aggregated.AggregatedFitRuntime] FIT application started.
+[INFO] [netty-http-server-thread-0] [modelengine.fit.http.server.netty.NettyHttpClassicServer] Start netty http server successfully. [httpPort=8080]
+```
+
+### 快速测试
+
+```bash
+# 测试基本连接
+curl http://localhost:8080/http-server/auth/bearer-static \
+  -H "Authorization: Bearer static-bearer-token-12345" \
+  -H "X-Service-Key: service-default-key"
+
+# 期望响应：Bearer Static Auth: Bearer static-bearer-token-12345
+```
+
+## 8. 下一步
+
+- 查看 [CURL_TEST_EXAMPLES.md](./CURL_TEST_EXAMPLES.md) 了解如何测试这些认证场景
+- 查看 [run_tests.sh](./run_tests.sh) 了解如何批量执行测试