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<h3 id="logrus特性"><a href="#logrus特性" class="headerlink" title="logrus特性"></a>logrus特性</h3><ul>
<li><p>完全兼容golang标准库日志模块：logrus拥有六种日志级别：debug、info、warn、error、fatal和panic，这是golang标准库日志模块的API的超集。如果您的项目使用标准库日志模块，完全可以以最低的代价迁移到logrus上。</p>
</li>
<li><p>可扩展的Hook机制：允许使用者通过hook的方式将日志分发到任意地方，如本地文件系统、标准输出、logstash、elasticsearch或者mq等，或者通过hook定义日志内容和格式等。</p>
</li>
<li><p>可选的日志输出格式：logrus内置了两种日志格式，<code>JSONFormatter</code>和<code>TextFormatter</code>，如果这两个格式不满足需求，可以自己动手实现接口<code>Formatter</code>，来定义自己的日志格式。</p>
</li>
<li><p>Field机制：logrus鼓励通过Field机制进行精细化的、结构化的日志记录，而不是通过冗长的消息来记录日志。</p>
</li>
<li><p>logrus是一个可插拔的、结构化的日志框架。</p>
</li>
</ul>
<h3 id="logrus使用"><a href="#logrus使用" class="headerlink" title="logrus使用"></a>logrus使用</h3><h4 id="简单示例"><a href="#简单示例" class="headerlink" title="简单示例"></a>简单示例</h4><figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> main</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> (</span><br><span class="line"> log <span class="string">"github.com/sirupsen/logrus"</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">main</span><span class="params">()</span></span> {</span><br><span class="line"> log.WithFields(log.Fields{</span><br><span class="line"> <span class="string">"animal"</span>: <span class="string">"walrus"</span>,</span><br><span class="line"> }).Info(<span class="string">"A walrus appears"</span>)</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>输出结果：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">time="2018-08-11T15:42:22+08:00" level=info msg="A walrus appears" animal=walrus</span><br></pre></td></tr></table></figure>
<h4 id="简单配置"><a href="#简单配置" class="headerlink" title="简单配置"></a>简单配置</h4><figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> main</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> (</span><br><span class="line"> <span class="string">"os"</span></span><br><span class="line"> log <span class="string">"github.com/sirupsen/logrus"</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">init</span><span class="params">()</span></span> {</span><br><span class="line"> <span class="comment">// 设置日志格式为json格式</span></span><br><span class="line"> log.SetFormatter(&log.JSONFormatter{})</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 设置将日志输出到标准输出（默认的输出为stderr，标准错误）</span></span><br><span class="line"> <span class="comment">// 日志消息输出可以是任意的io.writer类型</span></span><br><span class="line"> log.SetOutput(os.Stdout)</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 设置日志级别为warn以上</span></span><br><span class="line"> log.SetLevel(log.WarnLevel)</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">main</span><span class="params">()</span></span> {</span><br><span class="line"> log.WithFields(log.Fields{</span><br><span class="line"> <span class="string">"animal"</span>: <span class="string">"walrus"</span>,</span><br><span class="line"> <span class="string">"size"</span>: <span class="number">10</span>,</span><br><span class="line"> }).Info(<span class="string">"A group of walrus emerges from the ocean"</span>)</span><br><span class="line"></span><br><span class="line"> log.WithFields(log.Fields{</span><br><span class="line"> <span class="string">"omg"</span>: <span class="literal">true</span>,</span><br><span class="line"> <span class="string">"number"</span>: <span class="number">122</span>,</span><br><span class="line"> }).Warn(<span class="string">"The group's number increased tremendously!"</span>)</span><br><span class="line"></span><br><span class="line"> log.WithFields(log.Fields{</span><br><span class="line"> <span class="string">"omg"</span>: <span class="literal">true</span>,</span><br><span class="line"> <span class="string">"number"</span>: <span class="number">100</span>,</span><br><span class="line"> }).Fatal(<span class="string">"The ice breaks!"</span>)</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h4 id="Logger"><a href="#Logger" class="headerlink" title="Logger"></a>Logger</h4><p>logger是一种相对高级的用法, 对于一个大型项目, 往往需要一个全局的logrus实例，即<code>logger</code>对象来记录项目所有的日志。</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> main</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> (</span><br><span class="line"> <span class="string">"github.com/sirupsen/logrus"</span></span><br><span class="line"> <span class="string">"os"</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="comment">// logrus提供了New()函数来创建一个logrus的实例。</span></span><br><span class="line"><span class="comment">// 项目中，可以创建任意数量的logrus实例。</span></span><br><span class="line"><span class="keyword">var</span> log = logrus.New()</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">main</span><span class="params">()</span></span> {</span><br><span class="line"> <span class="comment">// 为当前logrus实例设置消息的输出，同样地，</span></span><br><span class="line"> <span class="comment">// 可以设置logrus实例的输出到任意io.writer</span></span><br><span class="line"> log.Out = os.Stdout</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 为当前logrus实例设置消息输出格式为json格式。</span></span><br><span class="line"> <span class="comment">// 同样地，也可以单独为某个logrus实例设置日志级别和hook，这里不详细叙述。</span></span><br><span class="line"> log.Formatter = &logrus.JSONFormatter{}</span><br><span class="line"></span><br><span class="line"> log.WithFields(logrus.Fields{</span><br><span class="line"> <span class="string">"animal"</span>: <span class="string">"walrus"</span>,</span><br><span class="line"> <span class="string">"size"</span>: <span class="number">10</span>,</span><br><span class="line"> }).Info(<span class="string">"A group of walrus emerges from the ocean"</span>)</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h4 id="Fields"><a href="#Fields" class="headerlink" title="Fields"></a>Fields</h4><p>logrus不推荐使用冗长的消息来记录运行信息，它推荐使用<code>Fields</code>来进行精细化的、结构化的信息记录。</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">log.WithFields(log.Fields{</span><br><span class="line"> <span class="string">"event"</span>: event,</span><br><span class="line"> <span class="string">"topic"</span>: topic,</span><br><span class="line"> <span class="string">"key"</span>: key,</span><br><span class="line">}).Fatal(<span class="string">"Failed to send event"</span>)</span><br></pre></td></tr></table></figure>
<p>前面的<code>WithFields</code> API可以规范使用者按照其提倡的方式记录日志。但是<code>WithFields</code>依然是可选的，因为某些场景下，使用者确实只需要记录仪一条简单的消息。</p>
<p>通常，在一个应用中、或者应用的一部分中，都有一些固定的<code>Field</code>。比如在处理用户http请求时，上下文中，所有的日志都会有<code>request_id</code>和<code>user_ip</code>。为了避免每次记录日志都要使用<code>log.WithFields(log.Fields{"request_id": request_id, "user_ip": user_ip})</code>，我们可以创建一个<code>logrus.Entry</code>实例，为这个实例设置默认<code>Fields</code>，在上下文中使用这个<code>logrus.Entry</code>实例记录日志即可。</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">requestLogger := log.WithFields(log.Fields{<span class="string">"request_id"</span>: request_id, <span class="string">"user_ip"</span>: user_ip})</span><br><span class="line">requestLogger.Info(<span class="string">"something happened on that request"</span>) # will log request_id and user_ip</span><br><span class="line">requestLogger.Warn(<span class="string">"something not great happened"</span>)</span><br></pre></td></tr></table></figure>
<h4 id="日志本地文件分割"><a href="#日志本地文件分割" class="headerlink" title="日志本地文件分割"></a>日志本地文件分割</h4><p>logrus本身不带日志本地文件分割功能，但是我们可以通过<code>file-rotatelogs</code>进行日志本地文件分割。 每次当我们写入日志的时候，logrus都会调用<code>file-rotatelogs</code>来判断日志是否要进行切分。</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> (</span><br><span class="line"> <span class="string">"github.com/lestrrat-go/file-rotatelogs"</span></span><br><span class="line"> <span class="string">"github.com/rifflock/lfshook"</span></span><br><span class="line"> log <span class="string">"github.com/sirupsen/logrus"</span></span><br><span class="line"> <span class="string">"time"</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">newLfsHook</span><span class="params">(logLevel *<span class="keyword">string</span>, maxRemainCnt <span class="keyword">uint</span>)</span> <span class="title">log</span>.<span class="title">Hook</span></span> {</span><br><span class="line"> writer, err := rotatelogs.New(</span><br><span class="line"> logName+<span class="string">".%Y%m%d%H"</span>,</span><br><span class="line"> <span class="comment">// WithLinkName为最新的日志建立软连接，以方便随着找到当前日志文件</span></span><br><span class="line"> rotatelogs.WithLinkName(logName),</span><br><span class="line"></span><br><span class="line"> <span class="comment">// WithRotationTime设置日志分割的时间，这里设置为一小时分割一次</span></span><br><span class="line"> rotatelogs.WithRotationTime(time.Hour),</span><br><span class="line"></span><br><span class="line"> <span class="comment">// WithMaxAge和WithRotationCount二者只能设置一个，</span></span><br><span class="line"> <span class="comment">// WithMaxAge设置文件清理前的最长保存时间，</span></span><br><span class="line"> <span class="comment">// WithRotationCount设置文件清理前最多保存的个数。</span></span><br><span class="line"> <span class="comment">//rotatelogs.WithMaxAge(time.Hour*24),</span></span><br><span class="line"> rotatelogs.WithRotationCount(maxRemainCnt),</span><br><span class="line"> )</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> err != <span class="literal">nil</span> {</span><br><span class="line"> log.Errorf(<span class="string">"config local file system for logger error: %v"</span>, err)</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> level, ok := logLevels[*logLevel]</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> ok {</span><br><span class="line"> log.SetLevel(level)</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> log.SetLevel(log.WarnLevel)</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> lfsHook := lfshook.NewHook(lfshook.WriterMap{</span><br><span class="line"> log.DebugLevel: writer,</span><br><span class="line"> log.InfoLevel: writer,</span><br><span class="line"> log.WarnLevel: writer,</span><br><span class="line"> log.ErrorLevel: writer,</span><br><span class="line"> log.FatalLevel: writer,</span><br><span class="line"> log.PanicLevel: writer,</span><br><span class="line"> }, &log.TextFormatter{DisableColors: <span class="literal">true</span>})</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> lfsHook</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h3 id="结合IRIS使用"><a href="#结合IRIS使用" class="headerlink" title="结合IRIS使用"></a>结合IRIS使用</h3><p>先初始化一个Logger出来</p>
<p><code>config/config.go</code> 定义一个log配置的结构体</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">type</span> LogConfig <span class="keyword">struct</span> {</span><br><span class="line"> Level <span class="keyword">string</span> <span class="string">`yaml:"level"`</span></span><br><span class="line"> Path <span class="keyword">string</span> <span class="string">`yaml:"path"`</span></span><br><span class="line"> Save <span class="keyword">uint</span> <span class="string">`yaml:"save"`</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>config/logger.go` 根据配置的日志级别，日志路径，日志保留天数初始化一个Logger</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> config</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> (</span><br><span class="line"> <span class="string">"github.com/lestrrat-go/file-rotatelogs"</span></span><br><span class="line"> <span class="string">"github.com/rifflock/lfshook"</span></span><br><span class="line"> <span class="string">"github.com/sirupsen/logrus"</span></span><br><span class="line"> <span class="string">"os"</span></span><br><span class="line"> <span class="string">"path"</span></span><br><span class="line"> <span class="string">"time"</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> (</span><br><span class="line"> Log = logrus.New()</span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">initLog</span><span class="params">(logConfig LogConfig)</span></span> {</span><br><span class="line"> Log.Out = os.Stdout</span><br><span class="line"> <span class="keyword">var</span> loglevel logrus.Level</span><br><span class="line"> err := loglevel.UnmarshalText([]<span class="keyword">byte</span>(logConfig.Level))</span><br><span class="line"> <span class="keyword">if</span> err != <span class="literal">nil</span> {</span><br><span class="line"> Log.Panicf(<span class="string">"设置log级别失败：%v"</span>, err)</span><br><span class="line"> }</span><br><span class="line"> Log.SetLevel(loglevel)</span><br><span class="line"> Log.Formatter = &logrus.TextFormatter{}</span><br><span class="line"> LocalFilesystemLogger(Log, logConfig.Path, logConfig.Save)</span><br><span class="line"> <span class="comment">//Log.ReportCaller = true</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">logWriter</span><span class="params">(logPath <span class="keyword">string</span>, level <span class="keyword">string</span>, save <span class="keyword">uint</span>)</span> *<span class="title">rotatelogs</span>.<span class="title">RotateLogs</span></span> {</span><br><span class="line"> logFullPath := path.Join(logPath, level)</span><br><span class="line"> logwriter, err := rotatelogs.New(</span><br><span class="line"> logFullPath+<span class="string">".%Y%m%d"</span>,</span><br><span class="line"> rotatelogs.WithLinkName(logFullPath), <span class="comment">// 生成软链，指向最新日志文件</span></span><br><span class="line"> rotatelogs.WithRotationCount(save), <span class="comment">// 文件最大保存份数</span></span><br><span class="line"> rotatelogs.WithRotationTime(<span class="number">24</span>*time.Hour), <span class="comment">// 日志切割时间间隔</span></span><br><span class="line"> )</span><br><span class="line"> <span class="keyword">if</span> err != <span class="literal">nil</span> {</span><br><span class="line"> <span class="built_in">panic</span>(err)</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> logwriter</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">LocalFilesystemLogger</span><span class="params">(log *logrus.Logger, logPath <span class="keyword">string</span>, save <span class="keyword">uint</span>)</span></span> {</span><br><span class="line"> lfHook := lfshook.NewHook(lfshook.WriterMap{</span><br><span class="line"> logrus.DebugLevel: logWriter(logPath, <span class="string">"debug"</span>, save), <span class="comment">// 为不同级别设置不同的输出目的</span></span><br><span class="line"> logrus.InfoLevel: logWriter(logPath, <span class="string">"info"</span>, save),</span><br><span class="line"> logrus.WarnLevel: logWriter(logPath, <span class="string">"warn"</span>, save),</span><br><span class="line"> logrus.ErrorLevel: logWriter(logPath, <span class="string">"error"</span>, save),</span><br><span class="line"> logrus.FatalLevel: logWriter(logPath, <span class="string">"fatal"</span>, save),</span><br><span class="line"> logrus.PanicLevel: logWriter(logPath, <span class="string">"panic"</span>, save),</span><br><span class="line"> }, &logrus.JSONFormatter{})</span><br><span class="line"> log.AddHook(lfHook)</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>再撸一个中间件打印请求记录<code>middleware/logger_middleware.go</code></p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> middleware</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> (</span><br><span class="line"> <span class="string">"bytes"</span></span><br><span class="line"> <span class="string">"github.com/dgrijalva/jwt-go"</span></span><br><span class="line"> <span class="string">"github.com/kataras/iris/v12"</span></span><br><span class="line"> <span class="string">"goms/config"</span></span><br><span class="line"> <span class="string">"io/ioutil"</span></span><br><span class="line"> <span class="string">"net/http"</span></span><br><span class="line"> <span class="string">"path"</span></span><br><span class="line"> <span class="string">"time"</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">LoggerHandler</span><span class="params">(ctx iris.Context)</span></span> {</span><br><span class="line"> p := ctx.Request().URL.Path</span><br><span class="line"> method := ctx.Request().Method</span><br><span class="line"> start := time.Now()</span><br><span class="line"> fields := <span class="built_in">make</span>(<span class="keyword">map</span>[<span class="keyword">string</span>]<span class="keyword">interface</span>{})</span><br><span class="line"> fields[<span class="string">"title"</span>] = <span class="string">"访问日志"</span></span><br><span class="line"> fields[<span class="string">"fun_name"</span>] = path.Join(method, p)</span><br><span class="line"> fields[<span class="string">"ip"</span>] = ctx.Request().RemoteAddr</span><br><span class="line"> fields[<span class="string">"method"</span>] = method</span><br><span class="line"> fields[<span class="string">"url"</span>] = ctx.Request().URL.String()</span><br><span class="line"> fields[<span class="string">"proto"</span>] = ctx.Request().Proto</span><br><span class="line"> <span class="comment">//fields["header"] = ctx.Request().Header</span></span><br><span class="line"> fields[<span class="string">"user_agent"</span>] = ctx.Request().UserAgent()</span><br><span class="line"> fields[<span class="string">"x_request_id"</span>] = ctx.GetHeader(<span class="string">"X-Request-Id"</span>)</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 如果是POST/PUT请求，并且内容类型为JSON，则读取内容体</span></span><br><span class="line"> <span class="keyword">if</span> method == http.MethodPost || method == http.MethodPut || method == http.MethodPatch {</span><br><span class="line"> body, err := ioutil.ReadAll(ctx.Request().Body)</span><br><span class="line"> <span class="keyword">if</span> err == <span class="literal">nil</span> {</span><br><span class="line"> <span class="keyword">defer</span> ctx.Request().Body.Close()</span><br><span class="line"> buf := bytes.NewBuffer(body)</span><br><span class="line"> ctx.Request().Body = ioutil.NopCloser(buf)</span><br><span class="line"> fields[<span class="string">"content_length"</span>] = ctx.GetContentLength()</span><br><span class="line"> fields[<span class="string">"body"</span>] = <span class="keyword">string</span>(body)</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> ctx.Next()</span><br><span class="line"></span><br><span class="line"> <span class="comment">//下面是返回日志</span></span><br><span class="line"> fields[<span class="string">"res_status"</span>] = ctx.ResponseWriter().StatusCode()</span><br><span class="line"> <span class="keyword">if</span> ctx.Values().GetString(<span class="string">"out_err"</span>) != <span class="string">""</span> {</span><br><span class="line"> fields[<span class="string">"out_err"</span>] = ctx.Values().GetString(<span class="string">"out_err"</span>)</span><br><span class="line"> }</span><br><span class="line"> fields[<span class="string">"res_length"</span>] = ctx.ResponseWriter().Header().Get(<span class="string">"size"</span>)</span><br><span class="line"> <span class="keyword">if</span> v := ctx.Values().Get(<span class="string">"res_body"</span>); v != <span class="literal">nil</span> {</span><br><span class="line"> <span class="keyword">if</span> b, ok := v.([]<span class="keyword">byte</span>); ok {</span><br><span class="line"> fields[<span class="string">"res_body"</span>] = <span class="keyword">string</span>(b)</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> token := ctx.Values().Get(<span class="string">"jwt"</span>)</span><br><span class="line"> <span class="keyword">if</span> token != <span class="literal">nil</span> {</span><br><span class="line"> fields[<span class="string">"uid"</span>] = token.(*jwt.Token).Claims</span><br><span class="line"> }</span><br><span class="line"> timeConsuming := time.Since(start).Nanoseconds() / <span class="number">1e6</span></span><br><span class="line"> config.Log.WithFields(fields).Infof(<span class="string">"[http] %s-%s-%s-%d(%dms)"</span>,</span><br><span class="line"> p, ctx.Request().Method, ctx.Request().RemoteAddr, ctx.ResponseWriter().StatusCode(), timeConsuming)</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>加进路由<code>route/route.go</code></p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> route</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> (</span><br><span class="line"> <span class="string">"github.com/kataras/iris/v12"</span></span><br><span class="line"> <span class="string">"github.com/kataras/iris/v12/mvc"</span></span><br><span class="line"> <span class="string">"goms/controllers"</span></span><br><span class="line"> <span class="string">"goms/middleware"</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">InitRoute</span><span class="params">(app *iris.Application)</span></span> {</span><br><span class="line"> app.Use(middleware.LoggerHandler)</span><br><span class="line"></span><br><span class="line"> mvc.Configure(app.Party(<span class="string">"/account"</span>), <span class="function"><span class="keyword">func</span><span class="params">(m *mvc.Application)</span></span> {</span><br><span class="line"> m.Handle(controllers.NewLoginController())</span><br><span class="line"> })</span><br><span class="line"> </span><br><span class="line"> ......</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>最后感觉还是不咋好用，用Json格式不太好看，用Text格式又没有时间，再寻找一下别的Log库看看！</p>
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