118 lines
3.5 KiB
TypeScript
118 lines
3.5 KiB
TypeScript
// File path: /d:/data/echoes/frontend/services/apiService.ts
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/**
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* ApiConfig接口用于配置API服务的基本信息。
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*/
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interface ApiConfig {
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baseURL: string; // API的基础URL
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timeout?: number; // 请求超时时间（可选）
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}
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export class ApiService {
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private static instance: ApiService; // ApiService的单例实例
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private baseURL: string; // API的基础URL
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private timeout: number; // 请求超时时间
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/**
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* 构造函数用于初始化ApiService实例。
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* @param config ApiConfig配置对象
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*/
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private constructor(config: ApiConfig) {
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this.baseURL = config.baseURL;
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this.timeout = config.timeout || 10000; // 默认超时时间为10000毫秒
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}
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/**
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* 获取ApiService的单例实例。
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* @param config 可选的ApiConfig配置对象
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* @returns ApiService实例
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*/
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public static getInstance(config?: ApiConfig): ApiService {
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if (!this.instance && config) {
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this.instance = new ApiService(config);
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}
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return this.instance;
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}
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/**
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* 获取系统令牌。
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* @returns Promise<string> 返回系统令牌
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* @throws Error 如果未找到凭据或请求失败
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*/
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private async getSystemToken(): Promise<string> {
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const credentials = localStorage.getItem('system_credentials');
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if (!credentials) {
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throw new Error('System credentials not found');
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}
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try {
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const response = await fetch(`${this.baseURL}/auth/system`, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify(JSON.parse(credentials)),
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});
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if (!response.ok) {
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throw new Error('Failed to get system token');
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}
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const { token } = await response.json();
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return token;
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} catch (error) {
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console.error('Error getting system token:', error);
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throw error;
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}
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}
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/**
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* 发起API请求。
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* @param endpoint 请求的API端点
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* @param options 请求选项
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* @param requiresAuth 是否需要身份验证（默认为true）
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* @returns Promise<T> 返回API响应数据
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* @throws Error 如果请求超时或发生其他错误
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*/
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public async request<T>(
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endpoint: string,
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options: RequestInit = {},
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requiresAuth = true
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): Promise<T> {
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const controller = new AbortController();
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const timeoutId = setTimeout(() => controller.abort(), this.timeout);
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try {
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const headers = new Headers(options.headers);
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if (requiresAuth) {
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const token = await this.getSystemToken();
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headers.set('Authorization', `Bearer ${token}`);
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}
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const response = await fetch(`${this.baseURL}${endpoint}`, {
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...options,
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headers,
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signal: controller.signal,
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});
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if (!response.ok) {
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throw new Error(`API Error: ${response.statusText}`);
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}
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const data = await response.json();
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return data as T;
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} catch (error: any) {
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if (error.name === 'AbortError') {
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throw new Error('Request timeout');
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}
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throw error;
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} finally {
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clearTimeout(timeoutId);
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}
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}
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}
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export default ApiService.getInstance({
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baseURL: import.meta.env.VITE_API_BASE_URL,
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}); |