ssr.js
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const fs = require('fs');
const path = require('path');
const rp = require('request-promise');
const LRU = require('lru-cache');
const _ = require('lodash');
const pkg = require('../../package.json');
const logger = global.yoho.logger;
const {createBundleRenderer} = require('vue-server-renderer');
const isDev = process.env.NODE_ENV === 'development' || !process.env.NODE_ENV;
let renderer;
let template = fs.readFileSync(path.join(__dirname, '../../src/index.html'), 'utf-8');
const microCache = LRU({ // eslint-disable-line
max: 10000,
maxAge: 2000
});
const isCacheable = () => {
return false;
};
const getContext = (req) => {
return {
url: req.url,
title: 'BLK！',
user: req.user,
env: {
isApp: req.yoho.isApp,
isiOS: req.yoho.isiOS,
isAndroid: req.yoho.isAndroid,
isYohoBuy: req.yoho.isYohoBuy,
channel: req.yoho.channel
}
};
};
const render = (req, res, next) => {
const cacheable = isCacheable(req);
if (cacheable) {
const html = microCache.get(req.url);
if (html) {
return res.send(html);
}
}
let context = getContext(req);
renderer.renderToString(context, (err, html) => {
if (err) {
// TODO 处理错误类型
return next(err);
}
if (cacheable) {
microCache.set(req.url, html);
}
return res.send(html);
});
};
if (!isDev) {
Promise.all([
rp(`http://cdn.yoho.cn/yohoblk-wap/bundle/yoho-ssr-server-${pkg.version}.json`, {json: true}),
rp(`http://cdn.yoho.cn/yohoblk-wap/bundle/yoho-ssr-client-${pkg.version}.json`, {json: true}),
]).then(results => {
logger.warn('ssr file is loaded');
renderer = createBundleRenderer(results[0], {
runInNewContext: false,
template,
clientManifest: results[1]
});
});
// const serverBundle = require(`../../public/dist/yohoblk-wap/bundle/yoho-ssr-server-${pkg.version}.json`);
// const clientManifest = require(`../../public/dist/yohoblk-wap/bundle/yoho-ssr-client-${pkg.version}.json`);
// renderer = createBundleRenderer(serverBundle, {
// runInNewContext: false,
// template,
// clientManifest
// });
}
const ssrRender = isDev ? (req, res, next) => {
let context = getContext(req);
process.send({action: 'ssr_request', context});
let event = msg => {
process.removeListener('message', event);
if (msg.action === 'ssr_request') {
if (msg.err) {
try {
const err = JSON.parse(msg.err);
if (err.code === 404) {
return next();
}
return next(err);
} catch (e) {
return next({
code: 500,
message: msg.err
});
}
}
return res.end(msg.html);
}
};
process.on('message', event);
} : render;
const routes = [
/product\/\d+/,
'/channel',
'/channel/search',
'/channel/men',
'/channel/women',
'/about'
];
module.exports = app => {
_.each(routes, r => app.get(r, ssrRender));
};