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        <h1><a href="../index.html">All files</a> / <a href="index.html">services</a> requestLogger.ts</h1>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js"><span class="cstat-no" title="statement not covered" >import { Context, Next } from 'koa';<span class="fstat-no" title="function not covered" ><span class="branch-0 cbranch-no" title="branch not covered" ></span></span></span>
import { logService, LogLevel, RequestLog } from './log.service';
&nbsp;
// 请求日志中间件
<span class="cstat-no" title="statement not covered" >export async function requestLogger(ctx: Context, next: Next): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >  const startTime = Date.now();</span>
<span class="cstat-no" title="statement not covered" >  const requestId = `req_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;</span>
&nbsp;
  // 请求开始前记录
<span class="cstat-no" title="statement not covered" >  const requestLog: Partial&lt;RequestLog&gt; = {</span>
<span class="cstat-no" title="statement not covered" >    requestId,</span>
<span class="cstat-no" title="statement not covered" >    method: ctx.method,</span>
<span class="cstat-no" title="statement not covered" >    path: ctx.path,</span>
<span class="cstat-no" title="statement not covered" >    query: ctx.querystring,</span>
<span class="cstat-no" title="statement not covered" >    headers: ctx.headers as Record&lt;string, string&gt;,</span>
<span class="cstat-no" title="statement not covered" >    ip: ctx.ip,</span>
<span class="cstat-no" title="statement not covered" >    userAgent: ctx.get('user-agent') || '',</span>
<span class="cstat-no" title="statement not covered" >  };</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  try {</span>
<span class="cstat-no" title="statement not covered" >    await next();</span>
&nbsp;
    // 请求完成后记录响应信息
<span class="cstat-no" title="statement not covered" >    requestLog.status = ctx.status;</span>
<span class="cstat-no" title="statement not covered" >    requestLog.responseTime = Date.now() - startTime;</span>
<span class="cstat-no" title="statement not covered" >    requestLog.responseSize = parseInt(ctx.get('Content-Length') || '0', 10);</span>
&nbsp;
    // 根据状态码确定日志级别
<span class="cstat-no" title="statement not covered" >    if (ctx.status &gt;= 500) {</span>
<span class="cstat-no" title="statement not covered" >      requestLog.level = LogLevel.ERROR;</span>
<span class="cstat-no" title="statement not covered" >      requestLog.error = `Server error: ${ctx.status}`;</span>
<span class="cstat-no" title="statement not covered" >    } else if (ctx.status &gt;= 400) {</span>
<span class="cstat-no" title="statement not covered" >      requestLog.level = LogLevel.WARN;</span>
<span class="cstat-no" title="statement not covered" >      requestLog.error = `Client error: ${ctx.status}`;</span>
<span class="cstat-no" title="statement not covered" >    } else {</span>
<span class="cstat-no" title="statement not covered" >      requestLog.level = LogLevel.INFO;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    logService.logRequest(requestLog as RequestLog);</span>
<span class="cstat-no" title="statement not covered" >  } catch (err: unknown) {</span>
<span class="cstat-no" title="statement not covered" >    const error = err as Error &amp; { status?: number; code?: number };</span>
&nbsp;
    // 记录错误请求
<span class="cstat-no" title="statement not covered" >    requestLog.status = error.status || 500;</span>
<span class="cstat-no" title="statement not covered" >    requestLog.responseTime = Date.now() - startTime;</span>
<span class="cstat-no" title="statement not covered" >    requestLog.level = LogLevel.ERROR;</span>
<span class="cstat-no" title="statement not covered" >    requestLog.error = error.message;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    logService.logRequest(requestLog as RequestLog);</span>
&nbsp;
    // 重新抛出错误，让 errorHandler 中间件处理
<span class="cstat-no" title="statement not covered" >    throw err;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
// 导出日志服务实例，供其他地方使用
export { logService, LogLevel };</pre></td></tr></table></pre>

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