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<div class="content injectable">
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<li>Injectables</li>
<li >LoggerInterceptor</li>
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<a href="#info" role="tab" id="info-tab" data-toggle="tab" data-link="info">Info</a>
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<div class="tab-pane fade active in" id="c-info">
<p class="comment">
<h3>File</h3>
</p>
<p class="comment">
<code>src/core/interceptors/logger.interceptor.ts</code>
</p>
<p class="comment">
<h3>Description</h3>
</p>
<p class="comment">
<p>Logs the requests</p>
</p>
<section>
<h3 id="index">Index</h3>
<table class="table table-sm table-bordered index-table">
<tbody>
<tr>
<td class="col-md-4">
<h6><b>Properties</b></h6>
</td>
</tr>
<tr>
<td class="col-md-4">
<ul class="index-list">
<li>
<span class="modifier">Private</span>
<span class="modifier">Readonly</span>
<a href="#logger" >logger</a>
</li>
</ul>
</td>
</tr>
<tr>
<td class="col-md-4">
<h6><b>Methods</b></h6>
</td>
</tr>
<tr>
<td class="col-md-4">
<ul class="index-list">
<li>
<a href="#intercept" >intercept</a>
</li>
<li>
<span class="modifier">Private</span>
<a href="#logHttpRequest" >logHttpRequest</a>
</li>
</ul>
</td>
</tr>
</tbody>
</table>
</section>
<section>
<h3 id="methods">
Methods
</h3>
<table class="table table-sm table-bordered">
<tbody>
<tr>
<td class="col-md-4">
<a name="intercept"></a>
<span class="name">
<span ><b>intercept</b></span>
<a href="#intercept"><span class="icon ion-ios-link"></span></a>
</span>
</td>
</tr>
<tr>
<td class="col-md-4">
<code>intercept(context: ExecutionContext, next: CallHandler)</code>
</td>
</tr>
<tr>
<td class="col-md-4">
<div class="io-line">Defined in <a href="" data-line="25"
class="link-to-prism">src/core/interceptors/logger.interceptor.ts:25</a></div>
</td>
</tr>
<tr>
<td class="col-md-4">
<div class="io-description"><p>intercept handler</p>
</div>
<div class="io-description">
<b>Parameters :</b>
<table class="params">
<thead>
<tr>
<td>Name</td>
<td>Type</td>
<td>Optional</td>
<td>Description</td>
</tr>
</thead>
<tbody>
<tr>
<td>context</td>
<td>
<code>ExecutionContext</code>
</td>
<td>
No
</td>
<td>
<p>context</p>
</td>
</tr>
<tr>
<td>next</td>
<td>
<code>CallHandler</code>
</td>
<td>
No
</td>
<td>
<p>next call</p>
</td>
</tr>
</tbody>
</table>
</div>
<div>
</div>
<div class="io-description">
<b>Returns : </b> <code>Observable<any></code>
</div>
<div class="io-description">
<p>handler</p>
</div>
</td>
</tr>
</tbody>
</table>
<table class="table table-sm table-bordered">
<tbody>
<tr>
<td class="col-md-4">
<a name="logHttpRequest"></a>
<span class="name">
<span class="modifier">Private</span>
<span ><b>logHttpRequest</b></span>
<a href="#logHttpRequest"><span class="icon ion-ios-link"></span></a>
</span>
</td>
</tr>
<tr>
<td class="col-md-4">
<span class="modifier-icon icon ion-ios-reset"></span>
<code>logHttpRequest(context: ExecutionContext, startTime: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank">number</a>)</code>
</td>
</tr>
<tr>
<td class="col-md-4">
<div class="io-line">Defined in <a href="" data-line="55"
class="link-to-prism">src/core/interceptors/logger.interceptor.ts:55</a></div>
</td>
</tr>
<tr>
<td class="col-md-4">
<div class="io-description"><p>logs the HTTP requests</p>
</div>
<div class="io-description">
<b>Parameters :</b>
<table class="params">
<thead>
<tr>
<td>Name</td>
<td>Type</td>
<td>Optional</td>
<td>Description</td>
</tr>
</thead>
<tbody>
<tr>
<td>context</td>
<td>
<code>ExecutionContext</code>
</td>
<td>
No
</td>
<td>
<p>context</p>
</td>
</tr>
<tr>
<td>startTime</td>
<td>
<code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank" >number</a></code>
</td>
<td>
No
</td>
<td>
<p>start time</p>
</td>
</tr>
</tbody>
</table>
</div>
<div>
</div>
<div class="io-description">
<b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code>
</div>
<div class="io-description">
<p>nothing</p>
</div>
</td>
</tr>
</tbody>
</table>
</section>
<section>
<h3 id="inputs">
Properties
</h3>
<table class="table table-sm table-bordered">
<tbody>
<tr>
<td class="col-md-4">
<a name="logger"></a>
<span class="name">
<span class="modifier">Private</span>
<span class="modifier">Readonly</span>
<span ><b>logger</b></span>
<a href="#logger"><span class="icon ion-ios-link"></span></a>
</span>
</td>
</tr>
<tr>
<td class="col-md-4">
<i>Type : </i> <code><a href="../injectables/LoggerService.html" target="_self" >LoggerService</a></code>
</td>
</tr>
<tr>
<td class="col-md-4">
<i>Default value : </i><code>new LoggerService(LoggerInterceptor.name)</code>
</td>
</tr>
<tr>
<td class="col-md-4">
<div class="io-line">Defined in <a href="" data-line="16" class="link-to-prism">src/core/interceptors/logger.interceptor.ts:16</a></div>
</td>
</tr>
<tr>
<td class="col-md-4">
<div class="io-description"><p>logs requests for the service</p>
</div>
</td>
</tr>
</tbody>
</table>
</section>
</div>
<div class="tab-pane fade tab-source-code" id="c-source">
<pre class="line-numbers compodoc-sourcecode"><code class="language-typescript">import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from '@nestjs/common';
import { Observable } from 'rxjs';
import { tap } from 'rxjs/operators';
import { Request, Response } from 'express';
import { LoggerService } from '../services/common'
////////////////////////////////////////////////////////////////////////
/**
* Logs the requests
*/
@Injectable()
export class LoggerInterceptor implements NestInterceptor {
//==================================================================================================
/**
* logs requests for the service
*/
private readonly logger: LoggerService = new LoggerService(LoggerInterceptor.name);
//==================================================================================================
/**
* intercept handler
* @param context context
* @param next next call
* @returns handler
*/
intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
const startTime = Date.now();
const contextType = context.getType();
return next.handle().pipe(
tap(
() => {
if (contextType === 'http') {
this.logHttpRequest(context, startTime);
}
},
(error: Error) => {
if (contextType === 'http') {
this.logHttpRequest(context, startTime);
} else {
const reqTime = Date.now() - startTime;
this.logger.log(`[${error.name}] ${error.message} ${reqTime}ms`);
}
}
)
);
}
//==================================================================================================
/**
* logs the HTTP requests
* @param context context
* @param startTime start time
* @returns nothing
*/
private logHttpRequest(context: ExecutionContext, startTime: number) {
if (context.getType() !== 'http') return;
const reqTime = Date.now() - startTime;
const controllerName = context.getClass().name;
const handlerName = context.getHandler().name;
const request = context.switchToHttp().getRequest<Request>();
const response = context.switchToHttp().getResponse<Response>();
const { url, method } = request;
const { statusCode } = response;
this.logger.log(
`[HTTP] ${method.toUpperCase()} ${url} ${statusCode} [${controllerName}:${handlerName}] ${reqTime}ms`
);
}
}
</code></pre>
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