angular-interceptors

Useful interceptors for Angular

Installation

npm install angular-interceptors --save

Usage

• Cache Interceptor
• Ensure Https Interceptor
• Prefix Url Interceptor
• InjectionTokens

Cache Interceptor

Cache all HTTP GET requests.

GET requests with a disable-cache header will not be cached.

import {CacheInterceptorModule} from 'angular-interceptors';
 
@NgModule({
  imports: [
    CacheInterceptorModule.forRoot(3 * 1000) // Max age in milliseconds. In this case 3 seconds. Defaults to 5 seconds.
  ]
})

Example:

this.http.get('https://some.url'); // --> https://some.url
this.http.get('https://some.url');
 
setTimeout(() => { 
  this.http.get('https://some.url'); // --> https://some.url
}, 5001);

Ensure Https Interceptor

Change http:// to https:// in HTTP request urls.

import {EnsureHttpsInterceptorModule} from 'angular-interceptors';
 
@NgModule({
  imports: [
    EnsureHttpsInterceptorModule.forRoot()
  ]
})

Example:

this.http.get('http://some.url');  // --> https://some.url
this.http.get('https://some.url'); // --> https://some.url

Prefix Url Interceptor

Prefix HTTP request urls.

import {PrefixUrlInterceptorModule} from 'angular-interceptors';
 
@NgModule({
  imports: [
    PrefixUrlInterceptorModule.forRoot('https://some.url') // prefix
  ]
})

Example:

this.http.get('/api/user'); // --> https://some.url/api/user

InjectionTokens

The configurations are also available as InjectionTokens:

InjectionToken	Module
MAX_AGE_MS	CacheInterceptorModule
PREFIX	PrefixUrlInterceptorModule

import {MAX_AGE_MS, PREFIX} from 'angular-interceptors';
 
@NgModule({
  providers: [
    {provide: MAX_AGE_MS, useValue: 3 * 1000},
    {provide: PREFIX, useValue: 'https://some.url'}
  ]
})