mirror of
https://github.com/DSpace/dspace-angular.git
synced 2025-10-07 01:54:15 +00:00
65 lines
2.1 KiB
TypeScript
65 lines
2.1 KiB
TypeScript
/**
|
|
* The contents of this file are subject to the license and copyright
|
|
* detailed in the LICENSE and NOTICE files at the root of the source
|
|
* tree and available online at
|
|
*
|
|
* http://www.dspace.org/license/
|
|
*/
|
|
|
|
import { XhrFactory } from '@angular/common';
|
|
import { Injectable } from '@angular/core';
|
|
import {
|
|
Agent as HttpAgent,
|
|
AgentOptions as HttpAgentOptions,
|
|
} from 'http';
|
|
import { Agent as HttpsAgent } from 'https';
|
|
import {
|
|
prototype,
|
|
XMLHttpRequest,
|
|
} from 'xhr2';
|
|
|
|
/**
|
|
* Allow HTTP sessions to be kept alive.
|
|
* Without this configuration, Angular re-connects to REST multiple times per SSR cycle.
|
|
* https://nodejs.org/api/http.html#new-agentoptions
|
|
*/
|
|
const agentOptions: HttpAgentOptions = {
|
|
keepAlive: true,
|
|
keepAliveMsecs: 60 * 1000,
|
|
};
|
|
|
|
// Agents need to be reused between requests, otherwise keep-alive doesn't help.
|
|
const httpAgent = new HttpAgent(agentOptions);
|
|
const httpsAgent = new HttpsAgent(agentOptions);
|
|
|
|
/**
|
|
* Constructs the XMLHttpRequest instances used for all HttpClient requests.
|
|
* Emulated by https://github.com/pwnall/node-xhr2 on the server.
|
|
* This class overrides the built-in Angular implementation to set additional configuration.
|
|
*
|
|
* Changes:
|
|
* - Turn off restriction for cookie headers to allow us to set cookies in requests to the backend.
|
|
* This was added to be able to perform a working XSRF request from the node server, as it needs to set a cookie for the XSRF token.
|
|
* - Override NodeJS HTTP(S) agents to keep sessions alive between requests.
|
|
* This improves SSR performance by reducing REST request overhead on the server.
|
|
*
|
|
* Note that this must be provided in ServerAppModule;
|
|
* it doesn't work when added as a Universal engine provider.
|
|
*/
|
|
@Injectable()
|
|
export class ServerXhrService implements XhrFactory {
|
|
build(): XMLHttpRequest {
|
|
prototype._restrictedHeaders.cookie = false;
|
|
const xhr = new XMLHttpRequest();
|
|
|
|
// This call is specific to xhr2 and will probably break if we use another library.
|
|
// https://github.com/pwnall/node-xhr2#features
|
|
(xhr as any).nodejsSet({
|
|
httpAgent,
|
|
httpsAgent,
|
|
});
|
|
|
|
return xhr;
|
|
}
|
|
}
|