详解如何使用Vue2做服务端渲染

<script>window.__initial_state=data</script>

import 'es6-promise/auto';

import { app, store } from './app';

store.replaceState(window.__INITIAL_STATE__);

app.$mount('#app');

import { app, router, store } from './app';

const isDev = process.env.NODE_ENV !== 'production';
  
export default context => {
 const s = isDev && Date.now();

 router.push(context.url);
 const matchedComponents = router.getMatchedComponents();

 if (!matchedComponents.length) {
  return Promise.reject({ code: '404' });
 }
  
 return Promise.all(matchedComponents.map(component => {
  if (component.preFetch) {
   return component.preFetch(store);
  }
 })).then(() => {
  return app;
 });
};

// 处理所有的get请求
app.get('*', (req, res) => {
 // 等待编译
 if (!renderer) {
  return res.end('waiting for compilation... refresh in a moment.');
 }

 var s = Date.now();
 const context = { url: req.url };
 // 渲染我们的Vue实例作为流
 const renderStream = renderer.renderToStream(context);
  
 // 当块第一次被渲染时
 renderStream.once('data', () => {
    // 将预先的HTML写入响应
  res.write(indexHTML.head);
 });
  
 // 每当新的块被渲染
 renderStream.on('data', chunk => {
    // 将块写入响应
  res.write(chunk);
 });
  
 // 当所有的块被渲染完成
 renderStream.on('end', () => {
  // 当vuex初始状态存在
  if (context.initialState) {
    // 将vuex初始状态以script的方式写入到页面中
   res.write(
    `<script>window.__INITIAL_STATE__=${
     serialize(context.initialState, { isJSON: true })
    }</script>`
   );
  }
  
  // 将结尾的HTML写入响应
  res.end(indexHTML.tail);
 });
  
 // 当渲染时发生错误
 renderStream.on('error', err => {
  if (err && err.code === '404') {
   res.status(404).end('404 | Page Not Found');
   return;
  }
  res.status(500).end('Internal Error 500');
 });
})

const axios = require('axios');
let api;

axios.defaults.timeout = 10000;

axios.interceptors.response.use((res) => {
 if (res.status >= 200 && res.status < 300) {
  return res;
 }
 return Promise.reject(res);
}, (error) => {
 // 网络异常
 return Promise.reject({message: '网络异常，请刷新重试', err: error});
});

if (process.__API__) {
 api = process.__API__;
} else {
 api = {
  get: function(target, params = {}) {
   const suffix = Object.keys(params).map(name => {
    return `${name}=${JSON.stringify(params[name])}`;
   }).join('&');
   const urls = `${target}?${suffix}`;
   return new Promise((resolve, reject) => {
    axios.get(urls, params).then(res => {
     resolve(res.data);
    }).catch((error) => {
     reject(error);
    });
   });
  },
  post: function(target, options = {}) {
   return new Promise((resolve, reject) => {
    axios.post(target, options).then(res => {
     resolve(res.data);
    }).catch((error) => {
     reject(error);
    });
   });
  }
 };
}

module.exports = api;

const isProd = process.env.NODE_ENV === 'production';

const axios = require('axios');
let host = isProd ? 'http://yczj.api.autohome.com.cn' : 'http://t.yczj.api.autohome.com.cn';
let cook = process.__COOKIE__ || '';
let api;

axios.defaults.baseURL = host;
axios.defaults.timeout = 10000;

axios.interceptors.response.use((res) => {
 if (res.status >= 200 && res.status < 300) {
  return res;
 }
 return Promise.reject(res);
}, (error) => {
 // 网络异常
 return Promise.reject({message: '网络异常，请刷新重试', err: error, type: 1});
});

if (process.__API__) {
 api = process.__API__;
} else {
 api = {
  get: function(target, options = {}) {
   return new Promise((resolve, reject) => {
    axios.request({
     url: target,
     method: 'get',
     headers: {
      'Cookie': cook
     },
     params: options
    }).then(res => {
     resolve(res.data);
    }).catch((error) => {
     reject(error);
    });
   });
  },
  post: function(target, options = {}) {
   return new Promise((resolve, reject) => {
    axios.request({
     url: target,
     method: 'post',
     headers: {
      'Cookie': cook
     },
     params: options
    }).then(res => {
     resolve(res.data);
    }).catch((error) => {
     reject(error);
    });
   });
  }
 };
}

 
module.exports = api;