152 lines
4.2 KiB
TypeScript
152 lines
4.2 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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/**
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* Imports.
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*/
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import {
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Headers,
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HttpRequestLibrary,
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HttpRequestOptions,
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HttpResponse,
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} from "../util/http";
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import { RequestThrottler } from "../util/RequestThrottler";
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import Axios from "axios";
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import { OperationFailedError, makeErrorDetails } from "../operations/errors";
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import { TalerErrorCode } from "../TalerErrorCode";
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import { URL } from "../util/url";
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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): void {
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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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const parsedUrl = new URL(url);
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if (this.throttlingEnabled && this.throttle.applyThrottle(url)) {
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throw OperationFailedError.fromCode(
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TalerErrorCode.WALLET_HTTP_REQUEST_THROTTLED,
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`request to origin ${parsedUrl.origin} was throttled`,
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{
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requestMethod: method,
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requestUrl: url,
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throttleStats: this.throttle.getThrottleStats(url),
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});
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}
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let timeout: number | undefined;
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if (typeof opt?.timeout?.d_ms === "number") {
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timeout = opt.timeout.d_ms;
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}
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const 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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timeout,
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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 new OperationFailedError(
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makeErrorDetails(
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TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
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"unexpected response type",
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{
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httpStatusCode: resp.status,
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requestUrl: url,
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requestMethod: method,
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},
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),
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);
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}
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const makeJson = async (): Promise<any> => {
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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 new OperationFailedError(
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makeErrorDetails(
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TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
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"invalid JSON",
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{
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httpStatusCode: resp.status,
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requestUrl: url,
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requestMethod: method,
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},
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),
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);
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}
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if (responseJson === null || typeof responseJson !== "object") {
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throw new OperationFailedError(
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makeErrorDetails(
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TalerErrorCode.WALLET_RECEIVED_MALFORMED_RESPONSE,
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"invalid JSON",
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{
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httpStatusCode: resp.status,
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requestUrl: url,
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requestMethod: method,
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},
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),
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);
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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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requestUrl: url,
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requestMethod: method,
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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(url: string, opt?: HttpRequestOptions): 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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}
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