miniprogram-downloader

miniprogram-downloader

An axios API like Download package for MiniProgram

小程序下载封装 小程序网络库miniprogram-network 核心库之一

API

methods:

• download<T>(options: DownloadOption): Promise<T>;
• download<T>(url: string, filePath?: string, options?): Promise<T>

options

• url 地址 required (只能请求时设置for single request)
• filePath 保存地址 (只能请求时设置for single request)
• cancelToken 取消 (只能请求时设置for single request)
• onProgressUpdate 下载进度响应 (只能请求时设置for single request)
• onHeadersReceived 接收头响应 (只能请求时设置for single request)
• timeout 自定义超时时间ms (只能请求时设置for single request)
• headers 请求头
• params URL参数
• baseURL 根URL
• retry 重试次数
• timestamp 是否记录发送和响应时间戳
• transformSend 输入转换函数
• transformResponse 输出转换函数

Global Listeners

• onSend (before request data send & after request data transformed)
• onResponse (after request response data transformed)
• onRejected (before catch of Promise)
• onAbort
• onComplete

Usage

install

npm i miniprogram-downloader

quick start

import {Download} from 'miniprogram-downloder';
Download.download('item/1.jpg')
        .then(applyFunction) // 返回数据
        .catch(err=>wx.showToast({title:'下载失败'}));

Download.download({url:'item/1.jpg'})
        .then(applyFunction) // 返回数据
        .catch(err=>wx.showToast({title:'下载失败'}));

直接返回保存位置

import {DOWNLOAD,transformDownloadResponseOkData} from 'miniprogram-downloder';
// 根据状态码，直接返回保存地址
//默认配置全局有效
DOWNLOAD.Defaults.transformResponse=transformDownloadResponseOkData;

//js
DOWNLOAD.download('item/1.jpg').then(console.log);//打印字符串，保存地址 
//TS
DOWNLOAD.download<string>('item/1.jpg')
        .then(path=>{
            console.log(path)//path 为保存路径
        }) 


//返回完整数据 对当前下载有效
DOWNLOAD.download(url:'item/1.jpg',null,{transformResponse:(res,o)=>res})
        .then(console.log) //打印 返回的Object

CancelToken (abort)

可通过cancel token 方式取消请求

import { DOWNLOAD, CancelToken } from 'miniprogram-downloader';

// 创建一个 tokensource
const source = CancelToken.source();

DOWNLOAD.download('items','tempfile' , { 
    // 配置 cancelToken
    cancelToken: source.token 
});

// 需要取消操作时
source.cancel('cancel the download');