ssr-2

ssr-2.ts

 
import { Injectable, Inject, PLATFORM_ID, Optional } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable, EMPTY } from 'rxjs';
import { isPlatformServer } from '@angular/common';
import { Request } from 'express';
import { REQUEST } from '@nguniversal/express-engine/tokens';

@Injectable({
	providedIn: 'root'
})
export class UniversalInterceptor implements HttpInterceptor {
	constructor(
    	@Inject(PLATFORM_ID) private platformId: any,
    	@Optional() @Inject(REQUEST) protected serverRequest?: Request
	) { }

	intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

    	if (isPlatformServer(this.platformId)) {
        	if (request.method === 'GET') {
            	const requestUrl = request.url.replace(/^\./, '');
            	if (this.serverRequest && !(requestUrl.startsWith('http') || requestUrl.startsWith('//'))) {
                	const protocolHost = `${this.serverRequest.protocol}://${this.serverRequest.get('host')}`;
                	const pathSeparator = !requestUrl.startsWith('/') ? '/' : '';
                	const url = protocolHost + pathSeparator + requestUrl;
                	request = request.clone({ url });
	            }
        	} else {
            	return EMPTY; // return all call except GET method
        	}
    	}
    	return next.handle(request);
	}
}