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http-request-decorator

v1.1.0

Published

基于 axios 和 ES Decorator ,用更优雅的 AOP 方式实现异步网络请求

Downloads

8

Readme

http-request-decorator

基于 axios 和 ES Decorator ,用更优雅的 AOP 方式实现异步网络请求

Install

npm install http-request-decorator or use yarn yarn add http-request-decorator

Example

import {
  Get,
  Response,
  Params,
  Header,
  requestConfig,
  HttpResponse,
} from 'http-request-decorator';

requestConfig.set({
  baseURL: 'https://test.api.com',
  headers: {
    'Cache-Control': 'max-age=0',
    'Authorization': 'Bearer foobar'
  },
});

type DataRes = {
  errcode: number,
  errmsg: string,
  data: {
    foo: string,
    bar: number,
    other: unknown,
  },
};

class MyApp {

  @Get('/detail/get')
  @Header({ 'Accept': '*/*' })
  @Params({ 'default_param': 123 })
  fetch(@Params params: Record<string, any>, @Response res?: HttpResponse<DataRes>) {
    if (res && res.data) {
      console.log(res.data.data.foo);
    }
  }

  onGetDetail() {
    const params = { foo: 'bar' };
    this.fetch(params);
    /**
     * 事实上 fetch 函数被包装后也相当于一个异步函数,如果你在 fetch 函数里返回 res,onGetDetail 也可以改写成 async/await 函数:
     * async onGetDetail() {
     *   const params = { foo: 'bar' };
     *   const res = await this.fetch(params);
     *   console.log('Response', res);
     * }
     * 或是 Promise 般调用:this.fetch().then(res => {});
     * 这样 res 就被传递过来,onGetDetail 方法里也能处理 http 请求返回结果
     * /
  }
}

注意1:使用多个方法装饰器时,调用顺序是由里装饰器到外装饰器,而调用 axios 请求逻辑是写在请求方法装饰器里的(如 @Get()@Post() 等),所以编写代码时务必把 请求方法装饰器 写在 最上面

注意2:使用多个参数装饰器时,参数并无指定顺序,但 @Response@Exception 在调用函数时是不需要传递实参的,请将其写在形参顺序的最后。

@Get('/foo/bar')
fetch(
  @Params params: any,
  @Response res?: HttpResponse<DataRes>,
  @Exception e?: unknown,
  ) {
    if (!e && res) {
      console.log(res);
    } else {
      console.log(e);
    }
  }

// 调用时只传 params
{
  this.fetch({ foo: 'bar' });
}

Docs

Decorators

  • Get 包装 GET 请求的方法装饰器,只接受请求的 url 参数,使用如 @Get('https://demo.someapi.com/foo/bar'),设置 baseUrl@Get('/foo/bar')
@Get('/foo/bar') // 设置了 baseUrl
// 未设置 baseUrl 使用完整链接 @Get('https://xxxx/foo/bar')
fetch(@Params params: any) {}
  • Post 包装 POST 请求的方法装饰器,使用同上

  • Put 包装 PUT 请求的方法装饰器,使用同上

  • Head 包装 HEAD 请求的方法装饰器,使用同上

  • Delete 包装 DELETE 请求的方法装饰器,使用同上

  • Header 包装请求头 headers 的方法装饰器,接受一个对象参数,会对默认请求头里相同字段项进行覆盖

import {
  requestConfig,
} from 'http-request-decorator';

requestConfig.set({
  headers: {
    'Cache-Control': 'no-cache',
    'platform': 'ios',
  },
});

class MyApp {
  @Get('/foo/bar')
  // 默认 headers Cache-Control 会被覆盖
  // headers {'Cache-Control': 'max-age=0', 'platform': 'ios'}
  @Header({ 'Cache-Control': 'max-age=0' })
  fetch() {}
}
  • Params 包装请求参数的 方法/参数 装饰器
class MyApp {
  @Get('/foo/bar')
  @Params({ foo: 123 }) // 包装静态不变参数
  fetch(@Params params: Record<string, any>) {
    // 包装动态参数的形参,会覆盖静态参数里的相同项
  }

  onFetch() {
    const params = { bar: 456, foo: 789 };
    this.fetch(params);
    // 最终参数 { foo: 789, bar: 456 }
  }
}
  • Config 请求配置的方法/参数装饰器。作为方法装饰器时,接受唯一参数类型 RequestConfig;作为参数装饰器时,修饰的参数类型 RequestConfig
@Get('/foo/bar')
@Config({ params: { foo: 1, bar: 2 } })
fetch(
  @Params params: any,
  @Config config: RequestConfig,
  @Response res?: HttpResponse,
) {}
  • Response 包装异步请求返回响应的参数装饰器
class MyApp {
  @Get('/foo/bar')
  fetch(@Response res?: HttpResponse) {
    console.log('The response:', res);
  }
}
  • Exception 包装请求时发生的错误捕获的参数装饰器
class MyApp {
  @Get('/foo/bar')
  fetch(@Response res?: HttpResponse, @Exception e?: unknown) {
    if (!e && res) {
      console.log('The response:', res);
    }
  }
}

Advanced

  • createMethodDecorator 自定义请求方法装饰器,接受一个 HttpMethod 字面量类型的字符串,返回一个方法装饰器,使用同 GetPost
const Patch = createMethodDecorator('PATCH');

class MyApp {
  @Patch('/foo/bar')
  fetch() {

  }
}
  • requestConfig 请求配置对象,有两个方法 setget set 方法可以设置全局的请求配置对象。参数类型 RequestConfig get 方法返回当前的默认请求配置对象的代理,是只读的。
requestConfig.set({
  baseURL: 'https://some-domain.com/api/',
  headers: { 'X-Requested-With': 'XMLHttpRequest' },
});
const config = requestConfig.get();
config.baseURL = 'xxx' // 无效
  • interceptors axios 的拦截器
interceptors.request.use((config) => {
  config.headers.Authorization = 'hello world';
  return config;
});
  • createInstance 创建一个 AxiosInstance ,独立隔离的请求配置。参数可选,指定的请求配置。
import { createInstance } from 'http-request-decorator';

const { requestConfig, Get } = createInstance({
  baseURL: 'https://api.another.com:8888',
});

包含以下属性,只在该实例生效,使用同上:

  1. 所有的装饰器
  2. createMethodDecorator
  3. interceptors
  4. requestConfig

Types

  • LooseObject
type LooseObject = Record<keyof any, any>;
  • HttpMethod
type Method =
  | 'get' | 'GET'
  | 'delete' | 'DELETE'
  | 'head' | 'HEAD'
  | 'options' | 'OPTIONS'
  | 'post' | 'POST'
  | 'put' | 'PUT'
  | 'patch' | 'PATCH'
  | 'purge' | 'PURGE'
  | 'link' | 'LINK'
  | 'unlink' | 'UNLINK'
  • RequestConfig
interface AxiosRequestConfig {
  url?: string;
  method?: Method;
  baseURL?: string;
  transformRequest?: AxiosTransformer | AxiosTransformer[];
  transformResponse?: AxiosTransformer | AxiosTransformer[];
  headers?: any;
  params?: any;
  paramsSerializer?: (params: any) => string;
  data?: any;
  timeout?: number;
  timeoutErrorMessage?: string;
  withCredentials?: boolean;
  adapter?: AxiosAdapter;
  auth?: AxiosBasicCredentials;
  responseType?: ResponseType;
  xsrfCookieName?: string;
  xsrfHeaderName?: string;
  onUploadProgress?: (progressEvent: any) => void;
  onDownloadProgress?: (progressEvent: any) => void;
  maxContentLength?: number;
  validateStatus?: ((status: number) => boolean) | null;
  maxBodyLength?: number;
  maxRedirects?: number;
  socketPath?: string | null;
  httpAgent?: any;
  httpsAgent?: any;
  proxy?: AxiosProxyConfig | false;
  cancelToken?: CancelToken;
  decompress?: boolean;
}
  • HttpResponse
interface AxiosResponse<T = any>  {
  data: T;
  status: number;
  statusText: string;
  headers: any;
  config: AxiosRequestConfig;
  request?: any;
}