102 lines
2.8 KiB
TypeScript
102 lines
2.8 KiB
TypeScript
/*
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This file is part of GNU Taler
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(C) 2019 Taler Systems S.A.
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GNU Taler is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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SPDX-License-Identifier: AGPL3.0-or-later
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*/
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import { Headers, HttpRequestLibrary, HttpRequestOptions, HttpResponse } from "../util/http";
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import { RequestThrottler } from "../util/RequestThrottler";
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import Axios, { AxiosResponse } from "axios";
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/**
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* Implementation of the HTTP request library interface for node.
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*/
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export class NodeHttpLib implements HttpRequestLibrary {
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private throttle = new RequestThrottler();
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private throttlingEnabled = true;
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/**
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* Set whether requests should be throttled.
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*/
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setThrottling(enabled: boolean) {
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this.throttlingEnabled = enabled;
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}
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private async req(
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method: "post" | "get",
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url: string,
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body: any,
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opt?: HttpRequestOptions,
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): Promise<HttpResponse> {
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if (this.throttlingEnabled && this.throttle.applyThrottle(url)) {
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throw Error("request throttled");
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}
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let resp: AxiosResponse;
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try {
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resp = await Axios({
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method,
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url: url,
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responseType: "text",
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headers: opt?.headers,
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validateStatus: () => true,
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transformResponse: (x) => x,
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data: body,
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});
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} catch (e) {
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throw e;
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}
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const respText = resp.data;
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if (typeof respText !== "string") {
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throw Error("unexpected response type");
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}
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const makeJson = async () => {
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let responseJson;
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try {
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responseJson = JSON.parse(respText);
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} catch (e) {
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throw Error("Invalid JSON from HTTP response");
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}
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if (responseJson === null || typeof responseJson !== "object") {
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throw Error("Invalid JSON from HTTP response");
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}
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return responseJson;
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};
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const headers = new Headers();
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for (const hn of Object.keys(resp.headers)) {
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headers.set(hn, resp.headers[hn]);
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}
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return {
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headers,
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status: resp.status,
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text: async () => resp.data,
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json: makeJson,
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};
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}
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async get(
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url: string,
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opt?: HttpRequestOptions,
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): Promise<HttpResponse> {
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return this.req("get", url, undefined, opt);
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}
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async postJson(
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url: string,
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body: any,
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opt?: HttpRequestOptions,
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): Promise<HttpResponse> {
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return this.req("post", url, body, opt);
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}
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} |