72 lines
2.6 KiB
TypeScript
72 lines
2.6 KiB
TypeScript
import { GET, Path, QueryParam } from "typescript-rest";
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import { LogService } from "matrix-js-snippets";
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import { Cache, CACHE_WIDGET_TITLES } from "../../MemoryCache";
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import { MatrixLiteClient } from "../../matrix/MatrixLiteClient";
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import config from "../../config";
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import { ScalarService } from "./ScalarService";
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import moment = require("moment");
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interface UrlPreviewResponse {
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cached_response: boolean;
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page_title_cache_item: {
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expires: string; // "2017-12-18T04:20:04.001806738Z"
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cached_response_err: string;
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cached_title: string; // the actual thing riot uses
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};
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error: {
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message: string;
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};
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}
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/**
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* API for the minimum Scalar API for widget functionality in clients.
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*/
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@Path("/api/v1/scalar/widgets")
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export class ScalarWidgetService {
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@GET
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@Path("title_lookup")
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public async titleLookup(@QueryParam("scalar_token") scalarToken: string, @QueryParam("curl") url: string): Promise<UrlPreviewResponse> {
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await ScalarService.getTokenOwner(scalarToken);
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const cachedResult = Cache.for(CACHE_WIDGET_TITLES).get(url);
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if (cachedResult) {
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cachedResult.cached_response = true;
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return cachedResult;
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}
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const client = new MatrixLiteClient(config.homeserver.accessToken);
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try {
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const preview = await client.getUrlPreview(url);
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const expirationTime = 60 * 80 * 1000; // 1 hour
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const expirationAsString = moment().add(expirationTime, "milliseconds").toISOString();
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const cachedItem = {
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cached_response: false, // we're not cached yet
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page_title_cache_item: {
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expires: expirationAsString,
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cached_response_err: null,
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cached_title: preview["og:title"],
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},
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error: {message: null},
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};
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Cache.for(CACHE_WIDGET_TITLES).put(url, cachedItem, expirationTime);
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return cachedItem;
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} catch (err) {
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LogService.error("ScalarWidgetService", "Error getting URL preview");
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LogService.error("ScalarWidgetService", err);
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return <UrlPreviewResponse>{
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// All of this is to match scalar's response :/
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cached_response: false,
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page_title_cache_item: {
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expires: null,
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cached_response_err: "Failed to get URL preview",
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cached_title: null,
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},
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error: {
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message: "Failed to get URL preview",
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},
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};
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}
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}
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} |