118 lines
4.4 KiB
JavaScript
118 lines
4.4 KiB
JavaScript
import { HttpResponse } from "@smithy/protocol-http";
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import { buildQueryString } from "@smithy/querystring-builder";
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import { requestTimeout } from "./request-timeout";
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export const keepAliveSupport = {
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supported: Boolean(typeof Request !== "undefined" && "keepalive" in new Request("https://[::1]")),
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};
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export class FetchHttpHandler {
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static create(instanceOrOptions) {
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if (typeof instanceOrOptions?.handle === "function") {
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return instanceOrOptions;
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}
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return new FetchHttpHandler(instanceOrOptions);
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}
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constructor(options) {
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if (typeof options === "function") {
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this.configProvider = options().then((opts) => opts || {});
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}
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else {
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this.config = options ?? {};
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this.configProvider = Promise.resolve(this.config);
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}
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}
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destroy() {
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}
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async handle(request, { abortSignal } = {}) {
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if (!this.config) {
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this.config = await this.configProvider;
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}
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const requestTimeoutInMs = this.config.requestTimeout;
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const keepAlive = this.config.keepAlive === true;
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if (abortSignal?.aborted) {
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const abortError = new Error("Request aborted");
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abortError.name = "AbortError";
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return Promise.reject(abortError);
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}
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let path = request.path;
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const queryString = buildQueryString(request.query || {});
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if (queryString) {
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path += `?${queryString}`;
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}
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if (request.fragment) {
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path += `#${request.fragment}`;
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}
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let auth = "";
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if (request.username != null || request.password != null) {
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const username = request.username ?? "";
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const password = request.password ?? "";
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auth = `${username}:${password}@`;
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}
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const { port, method } = request;
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const url = `${request.protocol}//${auth}${request.hostname}${port ? `:${port}` : ""}${path}`;
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const body = method === "GET" || method === "HEAD" ? undefined : request.body;
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const requestOptions = {
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body,
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headers: new Headers(request.headers),
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method: method,
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};
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if (body) {
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requestOptions.duplex = "half";
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}
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if (typeof AbortController !== "undefined") {
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requestOptions.signal = abortSignal;
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}
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if (keepAliveSupport.supported) {
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requestOptions.keepalive = keepAlive;
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}
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const fetchRequest = new Request(url, requestOptions);
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const raceOfPromises = [
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fetch(fetchRequest).then((response) => {
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const fetchHeaders = response.headers;
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const transformedHeaders = {};
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for (const pair of fetchHeaders.entries()) {
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transformedHeaders[pair[0]] = pair[1];
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}
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const hasReadableStream = response.body != undefined;
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if (!hasReadableStream) {
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return response.blob().then((body) => ({
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response: new HttpResponse({
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headers: transformedHeaders,
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reason: response.statusText,
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statusCode: response.status,
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body,
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}),
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}));
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}
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return {
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response: new HttpResponse({
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headers: transformedHeaders,
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reason: response.statusText,
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statusCode: response.status,
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body: response.body,
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}),
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};
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}),
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requestTimeout(requestTimeoutInMs),
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];
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if (abortSignal) {
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raceOfPromises.push(new Promise((resolve, reject) => {
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abortSignal.onabort = () => {
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const abortError = new Error("Request aborted");
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abortError.name = "AbortError";
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reject(abortError);
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};
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}));
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}
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return Promise.race(raceOfPromises);
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}
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updateHttpClientConfig(key, value) {
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this.config = undefined;
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this.configProvider = this.configProvider.then((config) => {
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config[key] = value;
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return config;
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});
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}
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httpHandlerConfigs() {
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return this.config ?? {};
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}
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}
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