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<!doctype html>
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<a class="post-title-link" href="/2017/09/28/Vue2+koa2+nuxt+ssr项目初构/" itemprop="url">Vue2+koa2+nuxt+ssr项目初构</a></h1>
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<p>在当下前端组件化特别流行的时代，怎样保证团队进行Vue组件化开发，又能保证网站SEO呢？</p>
<p>下面我就讲一下我的经历~</p>
<p>开始我一直以为Vue还没有完善的SSR脚手架，直到自己写了一个比较粗糙的跟同事们普及的时候，一同事说出了nuxt这个词的时候。</p>
<p>唉，自己竟然不知道，不要笑话我…真实无知了</p>
<p>现在开始讲一下我的Vue nuxt 项目初构的过程</p>
<h1 id="环境搭建"><a href="#环境搭建" class="headerlink" title="环境搭建"></a>环境搭建</h1><p>nuxt 相关的脚手架已经集成到了 vue-cli，同时提供 starter、express、koa、adonuxt</p>
<p>这里我们用的是 koa2</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div></pre></td><td class="code"><pre><div class="line">vue init nuxt/koa <project-name></div><div class="line"><span class="built_in">cd</span> <project-name> <span class="comment"># move to your project</span></div><div class="line">npm install <span class="comment"># or yarn install*[see note below]</span></div><div class="line">npm run dev</div></pre></td></tr></table></figure>
<p>此时监听 3000 端口，如果有 bug，别犹豫，先升级 node 版本到最新。</p>
<p>项目跑起来之后，有一个简单的轮廓，两个页面，index 和 about。</p>
<h1 id="目录结构"><a href="#目录结构" class="headerlink" title="目录结构"></a>目录结构</h1><p>具体请参考：<a href="https://zh.nuxtjs.org/guide/directory-structure" target="_blank" rel="external">https://zh.nuxtjs.org/guide/directory-structure</a></p>
<p>但是这个根目录结构对于我这个有特殊癖好的人来说感觉太太太… 特么的多了</p>
<p>下面进行改造</p>
<h2 id="1-在nuxt-config-js中添加节点"><a href="#1-在nuxt-config-js中添加节点" class="headerlink" title="1. 在nuxt.config.js中添加节点"></a>1. 在nuxt.config.js中添加节点</h2><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">srcDir: <span class="string">'client/'</span>, //该配置项用于配置应用的源码目录路径。</div></pre></td></tr></table></figure>
<h2 id="2-在项目根目录创建client目录，并将assets、components、layouts、middleware、pages、static、store移到该目录"><a href="#2-在项目根目录创建client目录，并将assets、components、layouts、middleware、pages、static、store移到该目录" class="headerlink" title="2. 在项目根目录创建client目录，并将assets、components、layouts、middleware、pages、static、store移到该目录"></a>2. 在项目根目录创建client目录，并将assets、components、layouts、middleware、pages、static、store移到该目录</h2><p>以上对于client端的改造告以段落</p>
<h1 id="Koa2-server端改造"><a href="#Koa2-server端改造" class="headerlink" title="Koa2 server端改造"></a>Koa2 server端改造</h1><h2 id="1-改造server端，必须先加上路由，加路由就得加自动路由，没那功夫建个子路由还要到server-index-js里进行添加"><a href="#1-改造server端，必须先加上路由，加路由就得加自动路由，没那功夫建个子路由还要到server-index-js里进行添加" class="headerlink" title="1. 改造server端，必须先加上路由，加路由就得加自动路由，没那功夫建个子路由还要到server/index.js里进行添加"></a>1. 改造server端，必须先加上路由，加路由就得加自动路由，没那功夫建个子路由还要到server/index.js里进行添加</h2><p>创建server/autoRoutes.js，大致意思自己意会吧，相信大家都能看懂。</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div></pre></td><td class="code"><pre><div class="line">/**</div><div class="line"> * Created by wangyipeng on 2017/9/26.</div><div class="line"> */</div><div class="line">const router = require(<span class="string">'koa-router'</span>)()</div><div class="line">const path = require(<span class="string">'path'</span>)</div><div class="line">const fs = require(<span class="string">'fs'</span>)</div><div class="line">var exports = {}</div><div class="line">exports[<span class="string">'auto'</span>] = <span class="keyword">function</span> (app) {</div><div class="line"> <span class="built_in">let</span> files = fs.readdirSync(path.join(__dirname, <span class="string">'controllers'</span>))</div><div class="line"></div><div class="line"> <span class="built_in">let</span> jsFiles = files.filter((f) => {</div><div class="line"> <span class="built_in">return</span> f.endsWith(<span class="string">'.js'</span>)</div><div class="line"> }, files)</div><div class="line"></div><div class="line"> // 控制器文件</div><div class="line"> <span class="keyword">for</span> (<span class="built_in">let</span> f of jsFiles) {</div><div class="line"> console.log(`import controller from file <span class="variable">${f}</span>...`)</div><div class="line"> <span class="built_in">let</span> name = f.substring(0, f.length - 3)</div><div class="line"> exports[name] = require(<span class="string">'./controllers/'</span> + f)</div><div class="line"> router.use(<span class="string">'/'</span> + name, exports[name].routes(), exports[name].allowedMethods())</div><div class="line"> app.use(exports[name].routes(), exports[name].allowedMethods())</div><div class="line"> }</div><div class="line">}</div><div class="line">module.exports = exports</div></pre></td></tr></table></figure>
<p>在server/index.js里添加</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div></pre></td><td class="code"><pre><div class="line">import AutoRoutes from <span class="string">'./autoRoutes'</span> //这个放在最前边，不多解释了</div><div class="line"></div><div class="line">AutoRoutes.auto(app) //这个放在原有的app.use前边就行了</div></pre></td></tr></table></figure>
<p>创建在server/controllers文件夹</p>
<p>写一个测试控制器server/controllers/user.js<br><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div></pre></td><td class="code"><pre><div class="line">/**</div><div class="line"> * Created by wangyipeng on 2017/9/27.</div><div class="line"> */</div><div class="line">const router = require(<span class="string">'koa-router'</span>)()</div><div class="line"></div><div class="line">router.get(<span class="string">'/index'</span>, async <span class="keyword">function</span> (ctx, next) {</div><div class="line"> ctx.body = [</div><div class="line"> {</div><div class="line"> name:<span class="string">'yipeng'</span>, age: <span class="string">'29'</span></div><div class="line"> },</div><div class="line"> {</div><div class="line"> name:<span class="string">'yihang'</span>, age: <span class="string">'18'</span></div><div class="line"> }</div><div class="line"> ]</div><div class="line">})</div><div class="line"></div><div class="line">module.exports = router</div></pre></td></tr></table></figure></p>
<p>大家可以npm run dev 运行下试试</p>
<p>浏览器输入<a href="http://localhost:3000/user/index查看效果" target="_blank" rel="external">http://localhost:3000/user/index查看效果</a></p>
<h2 id="2-没有日志的东西是没法在线上运行的，项目稳定不稳定都不知道，查问题都不知道"><a href="#2-没有日志的东西是没法在线上运行的，项目稳定不稳定都不知道，查问题都不知道" class="headerlink" title="2. 没有日志的东西是没法在线上运行的，项目稳定不稳定都不知道，查问题都不知道"></a>2. 没有日志的东西是没法在线上运行的，项目稳定不稳定都不知道，查问题都不知道</h2><p>下面安装koa-log4</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">npm install koa-log4 --save</div></pre></td></tr></table></figure>
<p>新建配置文件config/log4js.js</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div></pre></td><td class="code"><pre><div class="line"><span class="built_in">export</span> default {</div><div class="line"> <span class="string">'appenders'</span>: [</div><div class="line"> {</div><div class="line"> <span class="string">'type'</span>: <span class="string">'console'</span></div><div class="line"> },</div><div class="line"> {</div><div class="line"> <span class="string">'type'</span>: <span class="string">'clustered'</span>,</div><div class="line"> <span class="string">'appenders'</span>: [</div><div class="line"> {</div><div class="line"> <span class="string">'type'</span>: <span class="string">'dateFile'</span>,</div><div class="line"> <span class="string">'filename'</span>: <span class="string">'http.log'</span>,</div><div class="line"> <span class="string">'pattern'</span>: <span class="string">'-yyyy-MM-dd'</span>,</div><div class="line"> <span class="string">'category'</span>: <span class="string">'http'</span></div><div class="line"> },</div><div class="line"> {</div><div class="line"> <span class="string">'type'</span>: <span class="string">'file'</span>,</div><div class="line"> <span class="string">'filename'</span>: <span class="string">'app.log'</span>,</div><div class="line"> <span class="string">'maxLogSize'</span>: 10485760,</div><div class="line"> <span class="string">'pattern'</span>: <span class="string">'-yyyy-MM-dd'</span>,</div><div class="line"> <span class="string">'numBackups'</span>: 5</div><div class="line"> },</div><div class="line"> {</div><div class="line"> <span class="string">'type'</span>: <span class="string">'logLevelFilter'</span>,</div><div class="line"> <span class="string">'level'</span>: <span class="string">'ERROR'</span>,</div><div class="line"> <span class="string">'appender'</span>: {</div><div class="line"> <span class="string">'type'</span>: <span class="string">'file'</span>,</div><div class="line"> <span class="string">'filename'</span>: <span class="string">'errors.log'</span></div><div class="line"> }</div><div class="line"> }</div><div class="line"> ]</div><div class="line"> }</div><div class="line"> ]</div><div class="line">}</div></pre></td></tr></table></figure>
<p>接下来还是在server/index.js里添加</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div></pre></td><td class="code"><pre><div class="line">import Log4js from <span class="string">'koa-log4'</span></div><div class="line">import <span class="built_in">log</span>Config from <span class="string">'../config/log4js'</span> //这两行放在最上边，不解释</div><div class="line"></div><div class="line"></div><div class="line"></div><div class="line">// 生成logs目录 && 加载配置文件 start 这段放在中间位置即可</div><div class="line">const logger = Log4js.getLogger(<span class="string">'app'</span>)</div><div class="line"></div><div class="line">const <span class="built_in">log</span>Path = path.join(__dirname, <span class="string">'logs'</span>)</div><div class="line">try {</div><div class="line"> require(<span class="string">'fs'</span>).mkdirSync(<span class="built_in">log</span>Path)</div><div class="line">} catch (err) {</div><div class="line"> <span class="keyword">if</span> (err.code !== <span class="string">'EEXIST'</span>) {</div><div class="line"> console.error(<span class="string">'Could not set up log directory, error was: '</span>, err)</div><div class="line"> process.exit(1)</div><div class="line"> }</div><div class="line">}</div><div class="line">Log4js.configure(<span class="built_in">log</span>Config, {cwd: <span class="built_in">log</span>Path})</div><div class="line">// 生成logs目录 && 加载配置文件 end</div><div class="line"></div><div class="line">//我这里把开发过程的日志去掉了，太烦躁</div><div class="line"><span class="keyword">if</span> (!config.dev) {</div><div class="line"> app.use(Log4js.koaLogger(Log4js.getLogger(<span class="string">'http'</span>), {level: <span class="string">'auto'</span>}))</div><div class="line">}</div></pre></td></tr></table></figure>
<h1 id="前端报错收集"><a href="#前端报错收集" class="headerlink" title="前端报错收集"></a>前端报错收集</h1><p>想要收集项目运行过程中用户的前端报错，就得依赖window.onerror了</p>
<h2 id="1-在client文件夹创建app-html并添加window-onerror方法"><a href="#1-在client文件夹创建app-html并添加window-onerror方法" class="headerlink" title="1.在client文件夹创建app.html并添加window.onerror方法"></a>1.在client文件夹创建app.html并添加window.onerror方法</h2><p>为什么呢，因为脚手架默认html文件你是找不到的，要想修改必须新建一个app.html</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div></pre></td><td class="code"><pre><div class="line"><!DOCTYPE html></div><div class="line"><html {{ HTML_ATTRS }}></div><div class="line"><head></div><div class="line"> {{ HEAD }}</div><div class="line"> <script></div><div class="line"> window.onerror = <span class="keyword">function</span> (errorMessage, scriptURI, lineNumber, columnNumber, errorObj) {</div><div class="line"> var requestMessage = location.href + <span class="string">' '</span></div><div class="line"> + errorMessage + <span class="string">' '</span></div><div class="line"> + scriptURI + <span class="string">' '</span></div><div class="line"> + lineNumber + <span class="string">' '</span></div><div class="line"> + columnNumber + <span class="string">' '</span></div><div class="line"> + JSON.stringify(errorObj) + <span class="string">' '</span></div><div class="line"> + navigator.userAgent;</div><div class="line"> new Image().src=<span class="string">"/error/reporter?err="</span> + encodeURIComponent(requestMessage);</div><div class="line"> }</div><div class="line"> </script></div><div class="line"></head></div><div class="line"><body {{ BODY_ATTRS }}></div><div class="line">{{ APP }}</div><div class="line"></body></div><div class="line"></html></div></pre></td></tr></table></figure>
<h2 id="2-上边这里接口是我项目内写的"><a href="#2-上边这里接口是我项目内写的" class="headerlink" title="2.上边这里接口是我项目内写的"></a>2.上边这里接口是我项目内写的</h2><p>我新建了一个server/controllers/error.js</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div></pre></td><td class="code"><pre><div class="line">/**</div><div class="line"> * Created by wangyipeng on 2017/9/27.</div><div class="line"> */</div><div class="line">const router = require(<span class="string">'koa-router'</span>)()</div><div class="line">router.get(<span class="string">'/reporter'</span>, async <span class="keyword">function</span> (ctx, next) {</div><div class="line"> <span class="built_in">let</span> logger = ctx.Log4js.getLogger(<span class="string">'reporter'</span>)</div><div class="line"> logger.error(ctx.query.err)</div><div class="line"> ctx.body = {result: <span class="string">'ok'</span>}</div><div class="line">})</div><div class="line"></div><div class="line">module.exports = router</div></pre></td></tr></table></figure>
<p>具体ctx.Log4js是怎么来的？我是在server/index.js中添加以下代码：</p>
<p>注意：放在AutoRoutes.auto(app)前边<br><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div></pre></td><td class="code"><pre><div class="line">app.use(async (ctx, next) => {</div><div class="line"> ctx.Log4js = Log4js //给koa2上下文添加Log4js</div><div class="line"> await next()</div><div class="line">})</div></pre></td></tr></table></figure></p>
<h1 id="辅助方法"><a href="#辅助方法" class="headerlink" title="辅助方法"></a>辅助方法</h1><p>新建配置文件config/app.js<br><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div></pre></td><td class="code"><pre><div class="line">module.exports = {</div><div class="line"> apiPath: {</div><div class="line"> <span class="built_in">local</span>: {</div><div class="line"> host: <span class="string">'http://localhost:3000'</span>,</div><div class="line"> getUserList: {</div><div class="line"> method: <span class="string">'get'</span>,</div><div class="line"> url: <span class="string">'/user/list'</span></div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line">}</div></pre></td></tr></table></figure></p>
<p>在根目录创建helper目录</p>
<p>新建helper/utils.js<br><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div><div class="line">45</div><div class="line">46</div><div class="line">47</div></pre></td><td class="code"><pre><div class="line">/**</div><div class="line"> * 辅助函数</div><div class="line"> * @author wangyipeng</div><div class="line"> */</div><div class="line"><span class="built_in">export</span> default {</div><div class="line"> isFunction (fn) {</div><div class="line"> <span class="built_in">return</span> Object.prototype.toString.call(fn) === <span class="string">'[object Function]'</span></div><div class="line"> },</div><div class="line"> /**</div><div class="line"> *@param {Object}|{Array} object 需要遍历处理的对象或数组</div><div class="line"> *@param {Function} callback 遍历处理回调函数</div><div class="line"> *@param {Array} args callback回调函数的附加参数</div><div class="line"> */</div><div class="line"> each (object, callback, args) {</div><div class="line"> <span class="built_in">let</span> name</div><div class="line"> <span class="built_in">let</span> i = 0</div><div class="line"> <span class="built_in">let</span> length = object.length</div><div class="line"> <span class="built_in">let</span> isObj = length === undefined || this.isFunction(object)</div><div class="line"> <span class="keyword">if</span> (args) {</div><div class="line"> <span class="keyword">if</span> (isObj) {</div><div class="line"> <span class="keyword">for</span> (name <span class="keyword">in</span> object) {</div><div class="line"> <span class="keyword">if</span> (callback.apply(object[name], args) === <span class="literal">false</span>) {</div><div class="line"> <span class="built_in">break</span></div><div class="line"> }</div><div class="line"> }</div><div class="line"> } <span class="keyword">else</span> {</div><div class="line"> <span class="keyword">for</span> (; i < length;) {</div><div class="line"> <span class="keyword">if</span> (callback.apply(object[i++], args) === <span class="literal">false</span>) {</div><div class="line"> <span class="built_in">break</span></div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"> } <span class="keyword">else</span> {</div><div class="line"> <span class="keyword">if</span> (isObj) {</div><div class="line"> <span class="keyword">for</span> (name <span class="keyword">in</span> object) {</div><div class="line"> <span class="keyword">if</span> (callback.call(object[name], name, object[name]) === <span class="literal">false</span>) {</div><div class="line"> <span class="built_in">break</span></div><div class="line"> }</div><div class="line"> }</div><div class="line"> } <span class="keyword">else</span> {</div><div class="line"> <span class="keyword">for</span> (<span class="built_in">let</span> value = object[0]; i < length && callback.call(value, i, value) !== <span class="literal">false</span>; value = object[++i]) {</div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"> <span class="built_in">return</span> object</div><div class="line"> }</div><div class="line">}</div></pre></td></tr></table></figure></p>
<p>新建helper/services.js，这个挺有意思的通过配置文件一下就生成了所有接口的请求方法，再也不用一个写一遍了</p>
<p>这个依赖了axios，自行npm安装吧</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div><div class="line">45</div><div class="line">46</div><div class="line">47</div><div class="line">48</div><div class="line">49</div><div class="line">50</div><div class="line">51</div><div class="line">52</div></pre></td><td class="code"><pre><div class="line">import {apiPath} from <span class="string">'../config/app'</span></div><div class="line">import axios from <span class="string">'axios'</span></div><div class="line">import utils from <span class="string">'./utils'</span></div><div class="line"></div><div class="line">/**</div><div class="line"> * 构造接口请求方法</div><div class="line"> * @author wangyipeng</div><div class="line"> */</div><div class="line"><span class="built_in">let</span> services = {}</div><div class="line"></div><div class="line"><span class="keyword">for</span> (<span class="built_in">let</span> i <span class="keyword">in</span> apiPath) {</div><div class="line"> <span class="built_in">let</span> hostApiPath = apiPath[i]</div><div class="line"> <span class="built_in">let</span> apiHost = hostApiPath[<span class="string">'host'</span>]</div><div class="line"> services[i] = {}</div><div class="line"> <span class="keyword">for</span> (<span class="built_in">let</span> ind <span class="keyword">in</span> hostApiPath) {</div><div class="line"> <span class="keyword">if</span> (ind === <span class="string">'host'</span>) {</div><div class="line"> <span class="built_in">continue</span></div><div class="line"> }</div><div class="line"> <span class="built_in">let</span> api = hostApiPath[ind]</div><div class="line"> services[i][ind] = async <span class="keyword">function</span> (params, isNeedStatus = <span class="literal">false</span>) {</div><div class="line"> <span class="built_in">let</span> apiUrl = api.url</div><div class="line"> <span class="built_in">let</span> newParams = {}</div><div class="line"> <span class="keyword">if</span> (params) {</div><div class="line"> utils.each(params, <span class="keyword">function</span> (ind, param) {</div><div class="line"> <span class="keyword">if</span> (apiUrl.indexOf(<span class="string">'{'</span> + ind + <span class="string">'}'</span>) > -1) {</div><div class="line"> apiUrl = apiUrl.replace(<span class="string">'{'</span> + ind + <span class="string">'}'</span>, param)</div><div class="line"> } <span class="keyword">else</span> {</div><div class="line"> newParams[ind] = param</div><div class="line"> }</div><div class="line"> })</div><div class="line"> }</div><div class="line"> <span class="built_in">let</span> data = newParams</div><div class="line"> <span class="built_in">let</span> config = {}</div><div class="line"> <span class="built_in">let</span> response = {}</div><div class="line"> <span class="keyword">if</span> (api.method === <span class="string">'put'</span> || api.method === <span class="string">'post'</span> || api.method === <span class="string">'patch'</span>) {</div><div class="line"> response = await axios[api.method](apiHost + apiUrl, data, config)</div><div class="line"> <span class="keyword">if</span> (!isNeedStatus) {</div><div class="line"> response = response.data</div><div class="line"> }</div><div class="line"> } <span class="keyword">else</span> {</div><div class="line"> config.params = newParams</div><div class="line"> response = (await axios[api.method](apiHost + apiUrl, config))</div><div class="line"> <span class="keyword">if</span> (!isNeedStatus) {</div><div class="line"> response = response.data</div><div class="line"> }</div><div class="line"> }</div><div class="line"> <span class="built_in">return</span> response</div><div class="line"> }</div><div class="line"> }</div><div class="line">}</div><div class="line"></div><div class="line"><span class="built_in">export</span> default services</div></pre></td></tr></table></figure>
<p>想要调用<a href="http://localhost:3000/user/list接口直接如下：" target="_blank" rel="external">http://localhost:3000/user/list接口直接如下：</a></p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div></pre></td><td class="code"><pre><div class="line">import services from <span class="string">'helper/services.js'</span> //具体目录是啥看你项目用的地方吧</div><div class="line"></div><div class="line"><span class="built_in">let</span> response = await services.local.getUserList() //想要传参 {key:value}形式传参</div></pre></td></tr></table></figure>
<p>以上，所有的初期工作就基本完成了，基本可以交给团队进行项目开发了</p>
<p>源码地址：<a href="https://github.com/1peng/vue2_koa2_nuxt_ssr" target="_blank" rel="external">https://github.com/1peng/vue2_koa2_nuxt_ssr</a></p>
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<h3 id="百度爬虫"><a href="#百度爬虫" class="headerlink" title="百度爬虫"></a>百度爬虫</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">Baiduspider+(+http://www.baidu.com/search/spider.htm”)</div></pre></td></tr></table></figure>
<h3 id="google爬虫"><a href="#google爬虫" class="headerlink" title="google爬虫"></a>google爬虫</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div></pre></td><td class="code"><pre><div class="line">Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)</div><div class="line">Googlebot/2.1 (+http://www.googlebot.com/bot.html)</div><div class="line">Googlebot/2.1 (+http://www.google.com/bot.html)</div></pre></td></tr></table></figure>
<h3 id="雅虎爬虫（分别是雅虎中国和美国总部的爬虫）"><a href="#雅虎爬虫（分别是雅虎中国和美国总部的爬虫）" class="headerlink" title="雅虎爬虫（分别是雅虎中国和美国总部的爬虫）"></a>雅虎爬虫（分别是雅虎中国和美国总部的爬虫）</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div></pre></td><td class="code"><pre><div class="line">Mozilla/5.0 (compatible; Yahoo! Slurp China; http://misc.yahoo.com.cn/help.html)</div><div class="line">Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/<span class="built_in">help</span>/us/ysearch/slurp)</div></pre></td></tr></table></figure>
<h3 id="新浪爱问爬虫"><a href="#新浪爱问爬虫" class="headerlink" title="新浪爱问爬虫"></a>新浪爱问爬虫</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div></pre></td><td class="code"><pre><div class="line">iaskspider/2.0(+http://iask.com/<span class="built_in">help</span>/help_index.html”)</div><div class="line">Mozilla/5.0 (compatible; iaskspider/1.0; MSIE 6.0)</div></pre></td></tr></table></figure>
<h3 id="搜狗爬虫"><a href="#搜狗爬虫" class="headerlink" title="搜狗爬虫"></a>搜狗爬虫</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div></pre></td><td class="code"><pre><div class="line">Sogou web spider/3.0(+http://www.sogou.com/docs/<span class="built_in">help</span>/webmasters.htm<span class="comment">#07)</span></div><div class="line">Sogou Push Spider/3.0(+http://www.sogou.com/docs/<span class="built_in">help</span>/webmasters.htm<span class="comment">#07)</span></div></pre></td></tr></table></figure>
<h3 id="网易爬虫"><a href="#网易爬虫" class="headerlink" title="网易爬虫"></a>网易爬虫</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">Mozilla/5.0 (compatible; YodaoBot/1.0;http://www.yodao.com/<span class="built_in">help</span>/webmaster/spider/;)</div></pre></td></tr></table></figure>
<h3 id="MSN爬虫"><a href="#MSN爬虫" class="headerlink" title="MSN爬虫"></a>MSN爬虫</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">msnbot/1.0 (+http://search.msn.com/msnbot.htm)</div></pre></td></tr></table></figure>
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<a class="post-title-link" href="/2017/04/02/PHP中利用redis实现消息队列/" itemprop="url">PHP中利用redis实现消息队列</a></h1>
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<p>在电商活动中，常常会出现高并发的情况，例如很多人同时点击购买按钮，以至于购买人数超出了库存量，这是一种非常不理想的状况，因此，我们在PHP开发中就会引入消息队列来解决这种高并发的问题。</p>
<h1 id="将请求存入redis"><a href="#将请求存入redis" class="headerlink" title="将请求存入redis"></a>将请求存入redis</h1><p>当用户点击抢购按钮时，我们通过ajax将请求发给php进行处理，前台返回给用户正在处理的提示（当然，这种提示让设计师设计出让用户满意的效果）。</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div></pre></td><td class="code"><pre><div class="line"><span class="variable">$redis</span> = new Redis();</div><div class="line"><span class="variable">$redis</span>->connect(<span class="string">'127.0.0.1'</span>,6379);</div><div class="line">try{</div><div class="line"> <span class="variable">$redis</span>->LPUSH(<span class="string">'click'</span>,<span class="variable">$user_id</span>);</div><div class="line">}catch(Exception <span class="variable">$e</span>){</div><div class="line"> <span class="built_in">echo</span> <span class="variable">$e</span>->getMessage();</div><div class="line">}</div></pre></td></tr></table></figure>
<h1 id="在后台进行数据处理"><a href="#在后台进行数据处理" class="headerlink" title="在后台进行数据处理"></a>在后台进行数据处理</h1><h3 id="守护进程"><a href="#守护进程" class="headerlink" title="守护进程"></a>守护进程</h3><p>当上述请求存入redis后，就可以直接将结果返回给用户了。我们需要在服务端创建一个后台运行的程序，从redis中取出请求数据，并利用这些数据读取和更新数据库。但是这一切都是后台运行解决的，而非用户请求触发的。</p>
<h3 id="从redis中将请求取出"><a href="#从redis中将请求取出" class="headerlink" title="从redis中将请求取出"></a>从redis中将请求取出</h3><p>通过上面的代码，redis中会存储很多请求，这些请求都是准备用来处理的。这个列队已经存在了之后，再服务器后台，则对这些请求进行处理，第一步就是先从redis中逐一取出请求。</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div></pre></td><td class="code"><pre><div class="line"><span class="variable">$redis</span> = new Redis();</div><div class="line"><span class="variable">$redis</span>->pconnect(<span class="string">'127.0.0.1'</span>,6379);</div><div class="line"><span class="keyword">while</span>(True){</div><div class="line"> try{</div><div class="line"> <span class="variable">$value</span> = <span class="variable">$redis</span>->LPOP(<span class="string">'click'</span>);</div><div class="line"> /*</div><div class="line"> * 利用<span class="variable">$value</span>进行逻辑和数据处理</div><div class="line"> */</div><div class="line"> }catch(Exception <span class="variable">$e</span>){</div><div class="line"> <span class="built_in">echo</span> <span class="variable">$e</span>->getMessage();</div><div class="line"> }</div><div class="line">}</div></pre></td></tr></table></figure>
<h3 id="数据处理：长连接与事件"><a href="#数据处理：长连接与事件" class="headerlink" title="数据处理：长连接与事件"></a>数据处理：长连接与事件</h3><p>为了保证数据处理正常进行，必须和数据库之间建立长连接，因此上面我们采用了pconnect。在于mysql连接时，也要采用长连接，保证数据处理的有效性。同时，由于在后台运行，我们不可能随时获取数据库操作的状态，因此，我们最好采用innodb引擎，对数据库操作事件进行监听，如果出现了异常，要对事件结果进行检查，如果数据插入失败，应该重新执行该事件。</p>
<p>本文转自：<a href="http://www.tangshuang.net/100.html" target="_blank" rel="external">http://www.tangshuang.net/100.html</a></p>
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