xlspider/index.js

nodejs's web spider tools

const https = require('https')
const fs = require('fs')
const { join } = require('path')
/**
 * @function 获取所有英雄名称
 * 
 * @param {string} url 请求的URL地址
 * @return {Promise}
*/
function getAllHero(url){
    return new Promise((resolve, rejects) => {
        let rawData = ''
        https.get(url, res => {
            res.on('data', chunk => {
                rawData += chunk
            })
            res.on('end', () => { 
                const parsedData = JSON.parse(rawData)
                const hero = parsedData.hero || []
    
                let outContent = ''
                hero.forEach(obj => {
                    const { heroId, name } = obj
                    outContent += `${heroId}:${name}  `
                })
                resolve(outContent)
            })
        }).on('error', e => {
            rejects(e)
        })
    })
}
/**
 * @function 获取选中英雄皮肤列表
 * 
 * @param {string} heroId 请求的URL地址
 * @return {Promise}
*/
function getHeroSkin(heroId){
    const heroinfo_url = `https://game.gtimg.cn/images/lol/act/img/js/hero/${heroId}.js`
    return new Promise((resolve, rejects) => {
        https.get(heroinfo_url, res => {
            let content = ''
            res.on('data', chunk => {
                content += chunk
            })
            res.on('end', () => {
                const skinList = JSON.parse(content).skins
    
                resolve(skinList)
            })
    
        }).on('error', e =>{
            rejects(e.message)
        })
    })
}
/**
 * @function 保存英雄图片
 * 
 * @param {string} heroTitle 请求的URL地址
 * @param {string} name 皮肤名称
 * @param {string} imgLink 皮肤图片地址
 * @return {undefined}
*/
function saveImg(heroTitle, name, imgLink){
    https.get(imgLink, res => {
        res.setEncoding('binary')
        let buf = ''
        
        res.on('data', chunk => {
            buf += chunk
        })
        res.on('end', () => {
            fs.writeFile(`${__dirname}/${heroTitle}/${name}.jpg`, buf, "binary", function(err){
                if(err){
                    console.log("下载失败 fail");
                }
                console.log(name + "下载成功 success！");
            });
        })
    }).on('error', err => {
        console.error(err.message);
    })
}

module.exports = {
    getAllHero,
    getHeroSkin,
    saveImg
}