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* 统一的 HTTP 客户端
* 提供完整的 API 调用功能：
* - 自动 token 管理
* - 请求/响应转换
* - 错误处理
* - 文件上传
*/
import { AppError, ErrorCodes, logError } from '@/src/utils/errorHandler';
import { logger } from '@/src/utils/logger';
import { API_BASE_URL } from '@/src/config/env';
import { createErrorDetail, toCamelCase, toSnakeCase, wrapError, wrapSuccess } from './helpers';
import type { ApiResponse } from './types';
// ==================== 请求选项 ====================
export interface RequestOptions {
/** 是否自动转换请求参数为 snake_case */
transformRequest?: boolean;
/** 是否自动转换响应为 camelCase */
transformResponse?: boolean;
/** 自定义响应转换函数 */
responseTransformer?: (data: unknown) => unknown;
/** 从响应中提取数据的 key */
extractKey?: string;
}
const defaultOptions: RequestOptions = {
transformRequest: true,
transformResponse: true,
};
// ==================== 低级 API 客户端 ====================
/**
* 低级 API 客户端
* 提供基础的 HTTP 请求功能，自动处理 token、错误等
*/
class LowLevelApiClient {
private baseURL: string;
constructor(baseURL: string) {
this.baseURL = baseURL;
}
/**
* 从 Zustand store 获取 access token
* 使用延迟导入避免循环依赖
*/
private getToken(): string | null {
const { useUserStore } = require('@/src/store/userStore');
return useUserStore.getState().accessToken;
}
/**
* 创建标准化的错误对象
*/
private createError(message: string, status: number, data?: any): AppError {
let errorCode: string = ErrorCodes.UNKNOWN_ERROR;
switch (status) {
case 400:
errorCode = ErrorCodes.INVALID_INPUT;
break;
case 401:
errorCode = ErrorCodes.AUTH_REQUIRED;
break;
case 403:
errorCode = ErrorCodes.PERMISSION_DENIED;
break;
case 404:
errorCode = ErrorCodes.NOT_FOUND;
break;
case 409:
errorCode = ErrorCodes.ALREADY_EXISTS;
break;
case 422:
errorCode = ErrorCodes.VALIDATION_ERROR;
break;
case 500:
errorCode = ErrorCodes.SERVER_ERROR;
break;
case 503:
errorCode = ErrorCodes.SERVICE_UNAVAILABLE;
break;
}
const error = new AppError(message, errorCode, status, data);
logError(error, 'API Request');
return error;
}
/**
* 从 HTML 中提取错误信息
*/
private extractErrorFromHtml(html: string): string {
try {
const titleMatch = html.match(/<title>([^<]+)<\/title>/i);
if (titleMatch && titleMatch[1]) return titleMatch[1].trim();
const h1Match = html.match(/<h1[^>]*>([^<]+)<\/h1>/i);
if (h1Match && h1Match[1]) return h1Match[1].trim();
const disallowed = html.match(/DisallowedHost/i);
if (disallowed) return 'DisallowedHost（后端 ALLOWED_HOSTS 配置不允许该 Host）';
return '服务器返回了 HTML 错误页面';
} catch {
return '服务器错误';
}
}
/**
* 安全解析响应
*/
private async safeParseResponse(res: Response): Promise<any> {
const raw = await res.text().catch(() => '');
Iif (!raw) return null;
const contentType = (res.headers.get('content-type') || '').toLowerCase();
Eif (contentType.includes('application/json')) {
try {
return JSON.parse(raw);
} catch {
logger.warn('解析 JSON 响应失败，返回原始文本', { preview: raw.slice(0, 200) });
return raw;
}
}
return raw;
}
/**
* 通用请求方法
*/
async request<T = any>(endpoint: string, options: RequestInit = {}): Promise<T> {
const token = this.getToken();
const headers: Record<string, string> = {
...(options.headers as Record<string, string>),
};
const skipContentType = headers['X-Skip-Content-Type'] === 'true';
Iif (skipContentType) {
delete headers['X-Skip-Content-Type'];
}
const method = options.method?.toUpperCase();
if (method && ['POST', 'PUT', 'PATCH'].includes(method) && !skipContentType) {
Eif (!headers['Content-Type']) {
headers['Content-Type'] = 'application/json';
}
}
Eif (token) {
headers['Authorization'] = `Bearer ${token}`;
}
const config: RequestInit = {
...options,
headers,
};
try {
const fullUrl = `${this.baseURL}${endpoint}`;
logger.debug('API请求', {
method: config.method || 'GET',
url: fullUrl,
hasToken: !!token,
tokenPreview: token ? `${token.substring(0, 20)}...` : 'none',
});
const response = await fetch(fullUrl, config);
// 处理 401 (token 过期)
Iif (response.status === 401 && token) {
logger.info('Token 过期，尝试刷新...');
try {
const { useUserStore } = require('@/src/store/userStore');
await useUserStore.getState().refreshAccessToken();
const newToken = this.getToken();
if (newToken) {
const newHeaders = {
...headers,
Authorization: `Bearer ${newToken}`,
};
const retryResponse = await fetch(`${this.baseURL}${endpoint}`, {
...config,
headers: newHeaders,
});
if (!retryResponse.ok) {
const errorData = await this.safeParseResponse(retryResponse).catch(() => ({}));
let message =
(errorData && (errorData.detail || errorData.message || errorData.error)) ||
`请求失败: ${retryResponse.status}`;
if (typeof errorData === 'string' && errorData.length) {
message = /<html/i.test(errorData)
? this.extractErrorFromHtml(errorData)
: errorData;
}
throw this.createError(message, retryResponse.status, errorData);
}
return (await this.safeParseResponse(retryResponse)) as T;
}
} catch (error) {
logger.error('Token 刷新失败，需要重新登录', error as Error);
const { useUserStore } = require('@/src/store/userStore');
await useUserStore.getState().logout();
throw new AppError('认证失败，请重新登录', ErrorCodes.AUTH_EXPIRED, 401);
}
}
// 处理其他错误响应
if (!response.ok) {
const errorData = await this.safeParseResponse(response).catch(() => ({}));
// 记录完整的错误响应以便调试
logger.debug('API 错误响应', {
status: response.status,
url: response.url,
errorData: errorData,
});
let errorMessage = `请求失败: ${response.status}`;
if (errorData && typeof errorData === 'object') {
Iif (typeof errorData.detail === 'string') {
errorMessage = errorData.detail;
} else if (typeof errorData.message === 'string') {
errorMessage = errorData.message;
} else Eif (typeof errorData.error === 'string') {
errorMessage = errorData.error;
} else if (errorData.detail && typeof errorData.detail === 'object') {
// 处理嵌套的 detail 对象
errorMessage = JSON.stringify(errorData.detail);
} else if (errorData.message && typeof errorData.message === 'object') {
// 处理嵌套的 message 对象
errorMessage = JSON.stringify(errorData.message);
} else if (errorData.errors) {
const fieldErrors = Object.entries(errorData.errors)
.map(
([field, errors]) =>
`${field}: ${Array.isArray(errors) ? errors.join(', ') : errors}`
)
.join('\n');
errorMessage = fieldErrors || '输入数据有误';
} else {
// 如果都没有，尝试序列化整个 errorData
try {
errorMessage = JSON.stringify(errorData);
} catch {
errorMessage = `请求失败: ${response.status}`;
}
}
} else Eif (typeof errorData === 'string' && errorData.length) {
errorMessage = /<html/i.test(errorData)
? this.extractErrorFromHtml(errorData)
: errorData;
}
// 确保 errorMessage 是字符串
const messageStr =
typeof errorMessage === 'string' ? errorMessage : JSON.stringify(errorMessage);
const isTokenInvalid =
messageStr.includes('Invalid token') ||
messageStr.includes('invalid JWT') ||
messageStr.includes('signature is invalid') ||
messageStr.includes('token expired');
Iif (isTokenInvalid && token) {
logger.error('Token 无效，自动登出', new Error('Token invalid'));
const { useUserStore } = require('@/src/store/userStore');
await useUserStore.getState().logout();
throw new AppError('认证失败，请重新登录', ErrorCodes.AUTH_EXPIRED, 401);
}
throw this.createError(messageStr, response.status, errorData);
}
const parsed = await this.safeParseResponse(response);
return parsed as T;
} catch (error: any) {
if (error instanceof AppError) {
throw error;
}
if (error.message && error.message.includes('Network request failed')) {
throw new AppError('网络连接失败，请检查网络设置', ErrorCodes.NETWORK_ERROR);
}
Iif (error.message && error.message.includes('timeout')) {
throw new AppError('请求超时，请稍后重试', ErrorCodes.TIMEOUT_ERROR);
}
logError(error, 'API Request');
throw new AppError(error.message || '请求失败', ErrorCodes.UNKNOWN_ERROR);
}
}
/** GET 请求 */
async get<T = any>(endpoint: string, options: RequestInit = {}): Promise<T> {
return this.request<T>(endpoint, { ...options, method: 'GET' });
}
/** POST 请求 */
async post<T = any>(endpoint: string, data?: any, options: RequestInit = {}): Promise<T> {
const isFormData = data instanceof FormData;
const hasData = data !== undefined && data !== null;
const customHeaders: Record<string, string> = {
...(options.headers as Record<string, string>),
};
Iif (isFormData || !hasData) {
customHeaders['X-Skip-Content-Type'] = 'true';
}
const requestOptions: RequestInit = {
...options,
method: 'POST',
body: isFormData ? data : hasData ? JSON.stringify(data) : undefined,
headers: customHeaders,
};
return this.request<T>(endpoint, requestOptions);
}
/** PUT 请求 */
async put<T = any>(endpoint: string, data?: any, options: RequestInit = {}): Promise<T> {
const isFormData = data instanceof FormData;
const requestOptions: RequestInit = {
...options,
method: 'PUT',
body: isFormData ? data : data ? JSON.stringify(data) : undefined,
};
return this.request<T>(endpoint, requestOptions);
}
/** PATCH 请求 */
async patch<T = any>(endpoint: string, data?: any, options: RequestInit = {}): Promise<T> {
const isFormData = data instanceof FormData;
const requestOptions: RequestInit = {
...options,
method: 'PATCH',
body: isFormData ? data : data ? JSON.stringify(data) : undefined,
};
return this.request<T>(endpoint, requestOptions);
}
/** DELETE 请求 */
async delete<T = any>(endpoint: string, options: RequestInit = {}): Promise<T> {
return this.request<T>(endpoint, { ...options, method: 'DELETE' });
}
/** 文件上传 */
async upload<T = any>(
endpoint: string,
formData: FormData,
options: RequestInit = {}
): Promise<T> {
const token = this.getToken();
const headers: Record<string, string> = {
...(options.headers as Record<string, string>),
Accept: 'application/json',
};
if (headers['Content-Type']) {
delete headers['Content-Type'];
}
if (token) {
headers['Authorization'] = `Bearer ${token}`;
}
try {
const response = await fetch(`${this.baseURL}${endpoint}`, {
method: options.method || 'POST',
headers,
body: formData,
...options,
});
if (!response.ok) {
const errorPayload = await this.safeParseResponse(response).catch(() => ({}));
let message =
(errorPayload && (errorPayload.message || errorPayload.detail)) ||
`上传失败: ${response.status}`;
if (typeof errorPayload === 'string' && errorPayload.length) {
message = /<html/i.test(errorPayload)
? this.extractErrorFromHtml(errorPayload)
: errorPayload;
}
if (response.status === 500) {
throw this.createError('后端服务器错误 (500)。请检查服务器日志。', 500, errorPayload);
}
throw this.createError(message, response.status, errorPayload);
}
return (await this.safeParseResponse(response)) as T;
} catch (error: any) {
if (error instanceof AppError) {
throw error;
}
if (error.message && error.message.includes('Network request failed')) {
throw new AppError('网络连接失败，无法上传文件', ErrorCodes.NETWORK_ERROR);
}
logError(error, 'File Upload');
throw new AppError(error.message || '文件上传失败', ErrorCodes.UNKNOWN_ERROR);
}
}
}
// ==================== 高级 HTTP 客户端 ====================
/**
* 高级 HTTP 客户端
* 提供数据转换、标准化响应等高级功能
*/
class HttpClient {
private client: LowLevelApiClient;
constructor(client: LowLevelApiClient) {
this.client = client;
}
/**
* 处理响应数据
*/
private processResponse<T>(data: unknown, options: RequestOptions): T {
let result = data;
if (options.extractKey && result && typeof result === 'object') {
const resp = result as Record<string, unknown>;
if (options.extractKey in resp) {
result = resp[options.extractKey];
}
}
if (options.responseTransformer) {
result = options.responseTransformer(result);
} else if (options.transformResponse) {
result = toCamelCase(result);
}
return result as T;
}
/**
* 处理请求参数
*/
private processRequest(data: unknown, options: RequestOptions): unknown {
if (!data || !options.transformRequest) {
return data;
}
return toSnakeCase(data);
}
/** GET 请求 */
async get<T>(
endpoint: string,
options: RequestOptions = defaultOptions
): Promise<ApiResponse<T>> {
try {
const data = await this.client.get<unknown>(endpoint);
const result = this.processResponse<T>(data, options);
return wrapSuccess(result);
} catch (error) {
return wrapError<T>(createErrorDetail(error));
}
}
/** POST 请求 */
async post<T>(
endpoint: string,
body?: unknown,
options: RequestOptions = defaultOptions
): Promise<ApiResponse<T>> {
try {
const requestBody = this.processRequest(body, options);
const data = await this.client.post<unknown>(endpoint, requestBody);
const result = this.processResponse<T>(data, options);
return wrapSuccess(result);
} catch (error) {
return wrapError<T>(createErrorDetail(error));
}
}
/** PUT 请求 */
async put<T>(
endpoint: string,
body?: unknown,
options: RequestOptions = defaultOptions
): Promise<ApiResponse<T>> {
try {
const requestBody = this.processRequest(body, options);
const data = await this.client.put<unknown>(endpoint, requestBody);
const result = this.processResponse<T>(data, options);
return wrapSuccess(result);
} catch (error) {
return wrapError<T>(createErrorDetail(error));
}
}
/** PATCH 请求 */
async patch<T>(
endpoint: string,
body?: unknown,
options: RequestOptions = defaultOptions
): Promise<ApiResponse<T>> {
try {
const requestBody = this.processRequest(body, options);
const data = await this.client.patch<unknown>(endpoint, requestBody);
const result = this.processResponse<T>(data, options);
return wrapSuccess(result);
} catch (error) {
return wrapError<T>(createErrorDetail(error));
}
}
/** DELETE 请求 */
async delete<T>(
endpoint: string,
options: RequestOptions = defaultOptions
): Promise<ApiResponse<T>> {
try {
const data = await this.client.delete<unknown>(endpoint);
const result = this.processResponse<T>(data, options);
return wrapSuccess(result);
} catch (error) {
return wrapError<T>(createErrorDetail(error));
}
}
}
// ==================== 导出 ====================
/** 低级 API 客户端实例（用于 Django 后端） */
export const apiClient = new LowLevelApiClient(API_BASE_URL);
/** 高级 HTTP 客户端实例（提供数据转换等功能） */
export const httpClient = new HttpClient(apiClient);
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