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src/lib/api.ts

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+// 定义后端服务URL和OAuth2配置
+const API_BASE_URL = import.meta.env.VITE_API_BASE_URL
+if (!API_BASE_URL) throw new Error("VITE_API_BASE_URL is not set")
+
+const CLIENT_ID = import.meta.env.VITE_CLIENT_ID
+if (!CLIENT_ID) throw new Error("VITE_CLIENT_ID is not set")
+
+const CLIENT_SECRET = import.meta.env.VITE_CLIENT_SECRET
+if (!CLIENT_SECRET) throw new Error("VITE_CLIENT_SECRET is not set")
+
+// 统一的API响应类型
+type ApiResponse<T = undefined> =
+  | {
+      success: false
+      status: number
+      message: string
+    }
+  | {
+      success: true
+      data: T
+    }
+
+type PageRecord<T = unknown> = {
+  total: number
+  page: number
+  size: number
+  list: T[]
+}
+
+//  工具类型：用于提取请求参数和返回数据
+type ExtraReq<T extends (...args: never) => unknown> = T extends (
+  ...args: infer P
+) => unknown
+  ? P[0]
+  : never
+type ExtraResp<T extends (...args: never) => unknown> =
+  Awaited<ReturnType<T>> extends ApiResponse<infer D> ? D : never
+
+// 预定义错误
+const UnauthorizedError = new Error("未授权访问")
+
+export {
+  API_BASE_URL,
+  type ApiResponse,
+  CLIENT_ID,
+  CLIENT_SECRET,
+  type ExtraReq,
+  type ExtraResp,
+  type PageRecord,
+  UnauthorizedError,
+}

src/lib/cap/index.ts

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+import { callPublic } from "@/api/base"
+
+// 获取验证码
+// 假设你的后端接口为 /api/captcha/get，返回 { token: 'abc', base64: 'data:image/png...' }
+export async function getCaptcha() {
+  return await callPublic<{ token: string; base64: string }>("/api/captcha/get")
+}
+
+// 校验验证码
+// 假设后端接口为 /api/captcha/verify，返回 { success: true/false }
+export async function verifyCaptcha(token: string, answer: string) {
+  return await callPublic<boolean>("/api/captcha/verify", { token, answer })
+}