yandex 图片自动下载
一个在 yandex 上搜索图片并下载到本地的 node cli 程序.
使用帮助:
$0 <搜索关键词> [-t=超时(默认 1000)] [-r 是否替换下载(默认 false)]
示例:
$0 shop # 搜索 shop 并下载
$0 shop -t=0 # 不使用超时
$0 shop -t=0 -r # 覆盖重名文件
一个群友让做的程序, ￥100. 需求就是使用 yandex 搜索图片, 并自动下载到本地.
分析
- 打开 https://yandex.com/images/search?text=shop
- 查看 images/search? 请求, p={当前页数}
- 返回结果 blocks[0].params.lastPage 是大页数
- 返回结果中所有 img_url={原图地址}
win 下简单的命令行交互
这里用批处理实现, 其实 node 中也可以做交互的.
C:.
│ yandex 图片自动下载.bat
│
└─lib
node_modules
index.js
node.exe
yandex 图片自动下载.bat 文件内容
color f0 && chcp 936 && cls && @echo off
title yandex 图片自动下载
mode con cols=120 lines=30
:down
set /p keyword=输入关键词开始下载:
.\lib\node.exe .\lib\index.js "%keyword%"
echo ==========================
echo 全部下载完成
goto :down
源码
index.js
const fs = require('fs')
const url = require('url')
const path = require('path')
const fly = require('flyio')
const text = process.argv[2]
if(text === undefined) {
console.log(`
使用帮助:
$0 <搜索关键词> [-t=超时(默认 10000)] [-r 是否替换下载(默认 false)]
示例:
$0 shop # 搜索 shop 并下载
$0 shop -t=0 # 不使用超时
$0 shop -t=0 -r # 覆盖重名文件
`)
return
}
const argv = parseArgv()
const userConfig = {
text, // 用户搜索的关键词
timeout: argv['-t'] === undefined ? 10000 : Number(argv['-t']), // 设置超时时间, 默认 10 秒
replace: argv['-r'] || false, // 是否替换下载, 默认否
}
const config = userConfig
fly.config.timeout = config.timeout
const downHistoryFile = `${process.cwd()}/download.txt`
fs.writeFileSync(downHistoryFile, '')
const downDir = `${process.cwd()}/download`
new Promise(async () => {
let text = userConfig.text
let {urls: lastUrls = [], lastPage = } = (await getImgUrls({text}).catch(err => console.log('err', err))) || {}
if(lastPage === ) {
console.log('没有搜索结果, 你可以更换关键词重试')
return
}
for (let p = ; p < lastPage; p++) {
let curPage = p + 1
let urls = []
if(curPage === 1) {
urls = lastUrls
} else {
let getRes = await getImgUrls({text, p: curPage}).catch(err => console.log('err', err))
urls = (getRes || {}).urls || [] // 获取页数
}
urls = [...new Set(urls)] // 去除重复的 url
// urls = urls.slice(0, 3)
const paseUrls = []
urls.map(item => {
const {pathname, href} = url.parse(item)
let {base, ext, name} = path.parse(pathname);
ext = ext || '.jpg' // 如果没有扩展名时, 默认给定为 jpg
// let fullName = paseUrls.find(item => item.fullName === base) // 如果保存文件名重复, 则添加时间戳处理
// ? `${name}_${uuid()}_${ext}`
// : base
// let fullName = `${name}_${uuid()}_${ext}`
let fullName = `${name || uuid()}${ext}`
paseUrls.push({
name,
fullName,
href,
})
})
console.log(`正在下载第 ${curPage}/${lastPage} 页`)
await Promise.all(paseUrls.map(item => download(item.href, item.fullName))).finally(async () => {
console.log(`第 ${curPage}/${lastPage} 页下载完成`)
})
}
})
function hasFile(filePath) {
return fs.existsSync(filePath)
}
function parseArgv() {
return process.argv.slice(2).reduce((acc, arg) => {
let [k, v = true] = arg.split('=')
acc[k] = v
return acc
}, {})
}
async function getImgUrls(arg = {}) {
arg = {
text: 'shop',
p: 1,
...arg,
}
return new Promise((resolve, reject) => {
console.log(`正在查找图片, 关键词: ${arg.text}, 页: ${arg.p}`)
let api = `https://yandex.com/images/search?format=json&request=%7B%22blocks%22%3A%5B%7B%22block%22%3A%22serp-controller%22%2C%22params%22%3A%7B%7D%2C%22version%22%3A2%7D%2C%7B%22block%22%3A%22serp-list_infinite_yes%22%2C%22params%22%3A%7B%22initialPageNum%22%3A0%7D%2C%22version%22%3A2%7D%2C%7B%22block%22%3A%22more_direction_next%22%2C%22params%22%3A%7B%7D%2C%22version%22%3A2%7D%2C%7B%22block%22%3A%22gallery__items%3Aajax%22%2C%22params%22%3A%7B%7D%2C%22version%22%3A2%7D%5D%2C%22bmt%22%3A%7B%22lb%22%3A%22%22%7D%2C%22amt%22%3A%7B%22las%22%3A%22justifier-height%3D1%3Bthumb-underlay%3D1%3Bjustifier-setheight%3D1%3Bfitimages-height%3D1%3Bjustifier-fitincuts%3D1%3Bchunk.219.0%3D1%3Bchunk.169.0%3D1%22%7D%7D&yu=2650822041574437239&p=${arg.p}&text=${encodeURIComponent(arg.text)}&rpt=image&uinfo=sw-1920-sh-1200-ww-905-wh-1045-pd-2-wp-16x10_2560x1600`
// console.log('api', api)
fly.get(api)
.then(res => {
const data = res.data
handleData(data, r => resolve(r))
}).catch(err => {
reject(err)
})
})
}
function execSync(cmd, out = false) {
const child_process = require('child_process')
let str = child_process.execSync(cmd).toString().trim()
out && console.log(str)
return str
}
async function handleData(data, cb) {
try {
const lastPage = data.blocks[].params.lastPage
const urls = []
data.blocks.forEach(item => {
(item.html.match(/img_url=.*?&/g) || []).forEach(item => {
urls.push(decodeURIComponent((item.match(/img_url=(.*?)&/) || [])[1] || ""))
})
})
cb({
lastPage,
urls,
})
} catch (error) {
console.log('error', error)
cb({
msg: '搜索结果出现错误',
error,
lastPage: ,
urls: [],
})
}
}
async function download(u, p) {
fs.writeFileSync(downHistoryFile, fs.readFileSync(downHistoryFile) + u + '\r\n')
const savePath = `${downDir}/${p}`
if(!config.replace && hasFile(savePath)) {
console.log(`跳过已下载 ${p}`)
return true
} else {
if(!hasFile(downDir)) {
fs.mkdirSync(downDir)
}
return fly.download(u, savePath)
.then(d => {
console.log(`下载成功: ${p}`)
})
.catch(err => console.log('err', err.message))
}
}
function uuid(sep = '') {
let increment = process.increment === undefined ? (process.increment = 1) : (process.increment = (process.increment + 1))
return `${Date.now()}_${increment}`.replace(/_/g, sep)
}
package.json
{
"name": "getImg",
"version": "1.0.0",
"description": "",
"main": "index.js",
"keywords": [],
"author": "xw",
"dependencies": {
"flyio": "^0.6.14",
"request": "^2.88.0"
},
"license": "ISC"
}
注:
本程序有个小问题, 懒得解决, 看大家能不能发现.
来源 https://www.cnblogs.com/daysme/p/11919221.html
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