346 lines
10 KiB
JavaScript
346 lines
10 KiB
JavaScript
import fs from 'node:fs'
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import os from 'node:os'
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import lodash from 'lodash'
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import template from 'art-template'
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import chokidar from 'chokidar'
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import puppeteer from 'puppeteer'
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// 暂时保留对原config的兼容
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import cfg from '../../../lib/config/config.js'
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import { Data } from '#miao'
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const _path = process.cwd()
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// mac地址
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let mac = ''
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export default class PuppeteerRenderer {
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constructor(config) {
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this.browser = false
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this.lock = false
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this.shoting = []
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/** 截图数达到时重启浏览器 避免生成速度越来越慢 */
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this.restartNum = 100
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/** 截图次数 */
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this.renderNum = 0
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this.config = {
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headless: Data.def(config.headless, 'new'),
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args: Data.def(config.args, [
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'--disable-gpu',
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'--disable-setuid-sandbox',
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'--no-sandbox',
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'--no-zygote'
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])
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}
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if (config.chromiumPath || cfg?.bot?.chromium_path) {
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/** chromium其他路径 */
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this.config.executablePath = config.chromiumPath || cfg?.bot?.chromium_path
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}
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if (config.puppeteerWS || cfg?.bot?.puppeteer_ws) {
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/** chromium其他路径 */
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this.config.wsEndpoint = config.puppeteerWS || cfg?.bot?.puppeteer_ws
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}
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this.html = {}
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this.watcher = {}
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this.createDir('./temp/html')
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}
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createDir(dir) {
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if (!fs.existsSync(dir)) {
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let dirs = dir.split('/')
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for (let idx = 1; idx <= dirs.length; idx++) {
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let temp = dirs.slice(0, idx).join('/')
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if (!fs.existsSync(temp)) {
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fs.mkdirSync(temp)
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}
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}
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}
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}
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/**
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* 初始化chromium
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*/
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async browserInit() {
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if (this.browser) return this.browser
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if (this.lock) return false
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this.lock = true
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logger.info('puppeteer Chromium 启动中...')
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let connectFlag = false
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try {
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// 获取Mac地址
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if (!mac) {
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mac = await this.getMac()
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this.browserMacKey = `Yz:chromium:browserWSEndpoint:${mac}`
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}
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// 是否有browser实例
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const browserUrl = (await redis.get(this.browserMacKey)) || this.config.wsEndpoint
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if (browserUrl) {
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logger.info(`puppeteer Chromium from ${browserUrl}`)
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const browserWSEndpoint = await puppeteer.connect({ browserWSEndpoint: browserUrl }).catch((err) => {
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logger.error('puppeteer Chromium 缓存的实例已关闭')
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redis.del(this.browserMacKey)
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})
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// 如果有实例，直接使用
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if (browserWSEndpoint) {
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this.browser = browserWSEndpoint
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if (this.browser) {
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connectFlag = true
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}
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}
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}
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} catch (e) {
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logger.info('puppeteer Chromium 不存在已有实例')
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}
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if (!this.browser || !connectFlag) {
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// 如果没有实例，初始化puppeteer
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this.browser = await puppeteer.launch(this.config).catch((err, trace) => {
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let errMsg = err.toString() + (trace ? trace.toString() : '')
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if (typeof err == 'object') {
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logger.error(JSON.stringify(err))
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} else {
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logger.error(err.toString())
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if (errMsg.includes('Could not find Chromium')) {
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logger.error('没有正确安装 Chromium，可以尝试执行安装命令：node node_modules/puppeteer/install.js')
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} else if (errMsg.includes('cannot open shared object file')) {
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logger.error('没有正确安装 Chromium 运行库')
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}
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}
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logger.error(err, trace)
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})
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}
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this.lock = false
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if (!this.browser) {
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logger.error('puppeteer Chromium 启动失败')
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return false
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}
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if (connectFlag) {
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logger.info('puppeteer Chromium 已连接启动的实例')
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} else {
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logger.info(`[Chromium] ${this.browser.wsEndpoint()}`)
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if (process.env.pm_id && this.browserMacKey) {
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// 缓存一下实例30天
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const expireTime = 60 * 60 * 24 * 30
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await redis.set(this.browserMacKey, this.browser.wsEndpoint(), { EX: expireTime })
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}
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logger.info('puppeteer Chromium 启动成功')
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}
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/** 监听Chromium实例是否断开 */
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this.browser.on('disconnected', (e) => {
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logger.error('Chromium 实例关闭或崩溃！')
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this.browser = false
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})
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return this.browser
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}
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// 获取Mac地址
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getMac () {
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const mac = '00:00:00:00:00:00'
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try {
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const network = os.networkInterfaces()
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for (const a in network) {
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for (const i of network[a]) {
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if (i.mac && i.mac != mac) {
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return i.mac
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}
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}
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}
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} catch (e) {
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}
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return mac
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}
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/**
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* `chromium` 截图
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* @param data 模板参数
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* @param data.tplFile 模板路径，必传
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* @param data.saveId 生成html名称，为空name代替
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* @param data.imgType screenshot参数，生成图片类型：jpeg，png
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* @param data.quality screenshot参数，图片质量 0-100，jpeg是可传，默认90
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* @param data.omitBackground screenshot参数，隐藏默认的白色背景，背景透明。默认不透明
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* @param data.path screenshot参数，截图保存路径。截图图片类型将从文件扩展名推断出来。如果是相对路径，则从当前路径解析。如果没有指定路径，图片将不会保存到硬盘。
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* @param data.multiPage 是否分页截图，默认false
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* @param data.multiPageHeight 分页状态下页面高度，默认4000
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* @param data.pageGotoParams 页面goto时的参数
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* @return img/[]img 不做segment包裹
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*/
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async screenshot(name, data = {}) {
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if (!await this.browserInit()) {
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return false
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}
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const pageHeight = data.multiPageHeight || 4000
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let savePath = this.dealTpl(name, data)
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if (!savePath) {
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return false
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}
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let buff = ''
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let start = Date.now()
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let ret = []
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this.shoting.push(name)
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try {
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const page = await this.browser.newPage()
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let pageGotoParams = lodash.extend({ timeout: 120000 }, data.pageGotoParams || {})
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await page.goto(`file://${_path}${lodash.trim(savePath, '.')}`, pageGotoParams)
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let body = await page.$('#container') || await page.$('body')
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// 计算页面高度
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const boundingBox = await body.boundingBox()
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// 分页数
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let num = 1
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let randData = {
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type: data.imgType || 'jpeg',
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omitBackground: data.omitBackground || false,
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quality: data.quality || 90,
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path: data.path || ''
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}
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if (data.multiPage) {
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randData.type = 'jpeg'
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num = Math.round(boundingBox.height / pageHeight) || 1
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}
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if (data.imgType === 'png') {
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delete randData.quality
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}
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if (!data.multiPage) {
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buff = await body.screenshot(randData)
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/** 计算图片大小 */
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const kb = (buff.length / 1024).toFixed(2) + 'KB'
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logger.mark(`[图片生成][${name}][${this.renderNum}次] ${kb} ${logger.green(`${Date.now() - start}ms`)}`)
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this.renderNum++
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ret.push(buff)
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} else {
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// 分片截图
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if (num > 1) {
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await page.setViewport({
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width: boundingBox.width,
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height: pageHeight + 100
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})
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}
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for (let i = 1; i <= num; i++) {
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if (i !== 1 && i === num) {
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await page.setViewport({
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width: boundingBox.width,
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height: parseInt(boundingBox.height) - pageHeight * (num - 1)
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})
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}
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if (i !== 1 && i <= num) {
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await page.evaluate(pageHeight => window.scrollBy(0, pageHeight), pageHeight)
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}
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if (num === 1) {
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buff = await body.screenshot(randData)
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} else {
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buff = await page.screenshot(randData)
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}
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if (num > 2) {
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await Data.sleep(200)
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}
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this.renderNum++
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/** 计算图片大小 */
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const kb = (buff.length / 1024).toFixed(2) + 'KB'
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logger.mark(`[图片生成][${name}][${i}/${num}] ${kb}`)
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ret.push(buff)
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}
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if (num > 1) {
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logger.mark(`[图片生成][${name}] 处理完成`)
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}
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}
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page.close().catch((err) => logger.error(err))
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} catch (error) {
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logger.error(`[图片生成][${name}] 图片生成失败：${error}`)
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/** 关闭浏览器 */
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if (this.browser) {
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await this.browser.close().catch((err) => logger.error(err))
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}
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this.browser = false
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ret = []
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return false
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}
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this.shoting.pop()
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if (ret.length === 0 || !ret[0]) {
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logger.error(`[图片生成][${name}] 图片生成为空`)
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return false
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}
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this.restart()
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return data.multiPage ? ret : ret[0]
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}
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/** 模板 */
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dealTpl(name, data) {
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let { tplFile, saveId = name } = data
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let savePath = `./temp/html/${name}/${saveId}.html`
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/** 读取html模板 */
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if (!this.html[tplFile]) {
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this.createDir(`./temp/html/${name}`)
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try {
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this.html[tplFile] = fs.readFileSync(tplFile, 'utf8')
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} catch (error) {
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logger.error(`加载html错误：${tplFile}`)
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return false
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}
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this.watch(tplFile)
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}
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data.resPath = `${_path}/resources/`
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/** 替换模板 */
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let tmpHtml = template.render(this.html[tplFile], data)
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/** 保存模板 */
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fs.writeFileSync(savePath, tmpHtml)
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logger.debug(`[图片生成][使用模板] ${savePath}`)
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return savePath
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}
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/** 监听配置文件 */
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watch(tplFile) {
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if (this.watcher[tplFile]) return
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const watcher = chokidar.watch(tplFile)
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watcher.on('change', path => {
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delete this.html[tplFile]
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logger.mark(`[修改html模板] ${tplFile}`)
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})
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this.watcher[tplFile] = watcher
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}
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/** 重启 */
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restart() {
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/** 截图超过重启数时，自动关闭重启浏览器，避免生成速度越来越慢 */
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if (this.renderNum % this.restartNum === 0) {
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if (this.shoting.length <= 0) {
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setTimeout(async () => {
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if (this.browser) {
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await this.browser.close().catch((err) => logger.error(err))
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}
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this.browser = false
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logger.info('puppeteer Chromium 关闭重启...')
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}, 100)
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}
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}
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}
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}
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