45 lines
1.8 KiB
TypeScript
45 lines
1.8 KiB
TypeScript
import ApplicationComponent from "../ApplicationComponent";
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import {Request, Router} from "express";
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import {ServerError} from "../HttpError";
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import onFinished from "on-finished";
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export default class RedirectBackComponent extends ApplicationComponent {
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public static getPreviousURL(req: Request, defaultUrl?: string): string | undefined {
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return req.session?.previousUrl || defaultUrl;
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}
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public async handle(router: Router): Promise<void> {
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router.use((req, res, next) => {
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res.redirectBack = (defaultUrl?: string): void => {
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const previousUrl = RedirectBackComponent.getPreviousURL(req, defaultUrl);
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if (!previousUrl) throw new ServerError(`Couldn't redirect you back.`);
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res.redirect(previousUrl);
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};
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res.locals.getPreviousURL = (defaultUrl?: string) => {
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return RedirectBackComponent.getPreviousURL(req, defaultUrl);
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};
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onFinished(res, (err) => {
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const session = req.session;
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if (session) {
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const contentType = res.getHeader('content-type');
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if (!err && res.statusCode === 200 && (
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contentType && typeof contentType !== 'number' && contentType.indexOf('text/html') >= 0
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)) {
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session.previousUrl = req.originalUrl;
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req.log.debug('Prev url set to', session.previousUrl);
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session.save((err) => {
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if (err) {
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req.log.error(err, 'Error while saving session');
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}
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});
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}
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}
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});
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next();
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});
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}
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}
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