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https://github.com/patrikx3/angular-http-cache-interceptor

πŸ”₯ Angular HTTP cache interceptor
https://github.com/patrikx3/angular-http-cache-interceptor

all angular cache client everything headers http http-client interact intercept request

Last synced: 18 days ago
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πŸ”₯ Angular HTTP cache interceptor

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# πŸ”₯ Cache every request in Angular, not only the GET, but all methods of this interceptor, and allows you to interact with the interceptor via specific headers and modify the request, and these specific headers will be not included in the final request v2025.4.124


🌌 **Bugs are evidentβ„’ - MATRIX️**
🚧 **This project is under active development!**
πŸ“’ **We welcome your feedback and contributions.**

### NodeJS LTS is supported

### πŸ› οΈ Built on NodeJs version

```txt
v22.13.1
```

# πŸ“¦ Built on Angular

```text
19.1.4
```

# πŸ“ Description


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Usually, when you want to cache all requests, you do not cache all requests, but only the `GET` method. But, for some frontend applications, it is required to cache everything, otherwise the subsequent requests, without cache, would slow down the application flow. So, this micro-service caches all method/path/query variables/parameters/request body.

The way, we can find out what we are caching it is not simple. Usually, you would cache by a key of the `httpRequest.urlWithParams` and only the `GET` HTTP method.

To create this cache key, this package is using the `object-hash` package, with the following algorithm:
```ts
import hash from 'object-hash'

const hashOptions = {
algorithm: 'md5',
encoding: 'hex'
}

httpToKey(httpRequest: HttpRequest) {
const key = httpRequest.method + '@' + httpRequest.urlWithParams + '@' + hash(httpRequest.params, hashOptions) + '@' + hash(httpRequest.body, hashOptions)
return key
}
```

There is room in the future, to restrict to specific methods and add more configurations and functions. If there is a need for this micro-service, it could be enhanced, but for now, it is caching everything, with the exception, when you include the `CachingHeaders.NoCache` header into your request, then this request will always hit the server.

# Example web page that uses this package
https://angular-http-cache-interceptor.corifeus.com

# How to use it

```bash
npm i p3x-angular-http-cache-interceptor object-hash
```

## Include the caching interceptor into your Angular module
```ts
import { NgModule } from '@angular/core';

import { P3XHttpCacheInterceptorModule } from 'p3x-angular-http-cache-interceptor';

@NgModule({
declarations: [
],
imports: [
P3XHttpCacheInterceptorModule,
],
providers: [
],
bootstrap: []
})
export class SomeModule { }
```

### Options
```ts
import { P3XHttpCacheInterceptorModule, CachingHeaders, CachingStore } from 'p3x-angular-http-cache-interceptor';

P3XHttpCacheInterceptorModule.forRoot({
// default request is no cache
behavior: CachingHeaders.NoCache,

// if a request has CachingHeaders.Cache header it will cache globally
store: CachingStore.Global,
})

P3XHttpCacheInterceptorModule.forRoot({
// default request is cache
behavior: CachingHeaders.Cache,

// in this config, it will cache not globally, but per module
store: CachingStore.PerModule,
})
```

## Example invocation in a component

With and without cache:
```ts
import { Component } from '@angular/core';

import { HttpClient } from "@angular/common/http";
import {MatSnackBar} from "@angular/material/snack-bar";

import { CachingHeaders } from 'p3x-angular-http-cache-interceptor'

@Component({
selector: 'p3x-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss']
})
export class AppComponent {

constructor(
private http: HttpClient,
private snack: MatSnackBar,
) {
}

async loadCached() {
try {
const response : any = await this.http.get('https://server.patrikx3.com/api/core/util/random/32').toPromise()
this.snack.open(`Will be always the same: ${response.random}`, 'OK')
} catch(e) {
this.snack.open(`Sorry, error happened, check the console for the error`, 'OK')
console.error(e)
}
}

async loadNonCached() {
try {
const response : any = await this.http.get('https://server.patrikx3.com/api/core/util/random/32', {
headers: {
[CachingHeaders.NoCache]: '1'
}
}).toPromise()
this.snack.open(`Truly random data: ${response.random}`, 'OK')
} catch(e) {
this.snack.open(`Sorry, error happened, check the console for the error`, 'OK')
console.error(e)
}
}

}
```

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### πŸ“ˆ Versioning Policy
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---

[**P3X-ANGULAR-HTTP-CACHE-INTERCEPTOR**](https://corifeus.com/angular-http-cache-interceptor) Build v2025.4.124

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