index.js•7.93 kB
'use strict';
var protocolHttp = require('@smithy/protocol-http');
var querystringBuilder = require('@smithy/querystring-builder');
var utilBase64 = require('@smithy/util-base64');
function createRequest(url, requestOptions) {
return new Request(url, requestOptions);
}
function requestTimeout(timeoutInMs = 0) {
return new Promise((resolve, reject) => {
if (timeoutInMs) {
setTimeout(() => {
const timeoutError = new Error(`Request did not complete within ${timeoutInMs} ms`);
timeoutError.name = "TimeoutError";
reject(timeoutError);
}, timeoutInMs);
}
});
}
const keepAliveSupport = {
supported: undefined,
};
class FetchHttpHandler {
config;
configProvider;
static create(instanceOrOptions) {
if (typeof instanceOrOptions?.handle === "function") {
return instanceOrOptions;
}
return new FetchHttpHandler(instanceOrOptions);
}
constructor(options) {
if (typeof options === "function") {
this.configProvider = options().then((opts) => opts || {});
}
else {
this.config = options ?? {};
this.configProvider = Promise.resolve(this.config);
}
if (keepAliveSupport.supported === undefined) {
keepAliveSupport.supported = Boolean(typeof Request !== "undefined" && "keepalive" in createRequest("https://[::1]"));
}
}
destroy() {
}
async handle(request, { abortSignal, requestTimeout: requestTimeout$1 } = {}) {
if (!this.config) {
this.config = await this.configProvider;
}
const requestTimeoutInMs = requestTimeout$1 ?? this.config.requestTimeout;
const keepAlive = this.config.keepAlive === true;
const credentials = this.config.credentials;
if (abortSignal?.aborted) {
const abortError = new Error("Request aborted");
abortError.name = "AbortError";
return Promise.reject(abortError);
}
let path = request.path;
const queryString = querystringBuilder.buildQueryString(request.query || {});
if (queryString) {
path += `?${queryString}`;
}
if (request.fragment) {
path += `#${request.fragment}`;
}
let auth = "";
if (request.username != null || request.password != null) {
const username = request.username ?? "";
const password = request.password ?? "";
auth = `${username}:${password}@`;
}
const { port, method } = request;
const url = `${request.protocol}//${auth}${request.hostname}${port ? `:${port}` : ""}${path}`;
const body = method === "GET" || method === "HEAD" ? undefined : request.body;
const requestOptions = {
body,
headers: new Headers(request.headers),
method: method,
credentials,
};
if (this.config?.cache) {
requestOptions.cache = this.config.cache;
}
if (body) {
requestOptions.duplex = "half";
}
if (typeof AbortController !== "undefined") {
requestOptions.signal = abortSignal;
}
if (keepAliveSupport.supported) {
requestOptions.keepalive = keepAlive;
}
if (typeof this.config.requestInit === "function") {
Object.assign(requestOptions, this.config.requestInit(request));
}
let removeSignalEventListener = () => { };
const fetchRequest = createRequest(url, requestOptions);
const raceOfPromises = [
fetch(fetchRequest).then((response) => {
const fetchHeaders = response.headers;
const transformedHeaders = {};
for (const pair of fetchHeaders.entries()) {
transformedHeaders[pair[0]] = pair[1];
}
const hasReadableStream = response.body != undefined;
if (!hasReadableStream) {
return response.blob().then((body) => ({
response: new protocolHttp.HttpResponse({
headers: transformedHeaders,
reason: response.statusText,
statusCode: response.status,
body,
}),
}));
}
return {
response: new protocolHttp.HttpResponse({
headers: transformedHeaders,
reason: response.statusText,
statusCode: response.status,
body: response.body,
}),
};
}),
requestTimeout(requestTimeoutInMs),
];
if (abortSignal) {
raceOfPromises.push(new Promise((resolve, reject) => {
const onAbort = () => {
const abortError = new Error("Request aborted");
abortError.name = "AbortError";
reject(abortError);
};
if (typeof abortSignal.addEventListener === "function") {
const signal = abortSignal;
signal.addEventListener("abort", onAbort, { once: true });
removeSignalEventListener = () => signal.removeEventListener("abort", onAbort);
}
else {
abortSignal.onabort = onAbort;
}
}));
}
return Promise.race(raceOfPromises).finally(removeSignalEventListener);
}
updateHttpClientConfig(key, value) {
this.config = undefined;
this.configProvider = this.configProvider.then((config) => {
config[key] = value;
return config;
});
}
httpHandlerConfigs() {
return this.config ?? {};
}
}
const streamCollector = async (stream) => {
if ((typeof Blob === "function" && stream instanceof Blob) || stream.constructor?.name === "Blob") {
if (Blob.prototype.arrayBuffer !== undefined) {
return new Uint8Array(await stream.arrayBuffer());
}
return collectBlob(stream);
}
return collectStream(stream);
};
async function collectBlob(blob) {
const base64 = await readToBase64(blob);
const arrayBuffer = utilBase64.fromBase64(base64);
return new Uint8Array(arrayBuffer);
}
async function collectStream(stream) {
const chunks = [];
const reader = stream.getReader();
let isDone = false;
let length = 0;
while (!isDone) {
const { done, value } = await reader.read();
if (value) {
chunks.push(value);
length += value.length;
}
isDone = done;
}
const collected = new Uint8Array(length);
let offset = 0;
for (const chunk of chunks) {
collected.set(chunk, offset);
offset += chunk.length;
}
return collected;
}
function readToBase64(blob) {
return new Promise((resolve, reject) => {
const reader = new FileReader();
reader.onloadend = () => {
if (reader.readyState !== 2) {
return reject(new Error("Reader aborted too early"));
}
const result = (reader.result ?? "");
const commaIndex = result.indexOf(",");
const dataOffset = commaIndex > -1 ? commaIndex + 1 : result.length;
resolve(result.substring(dataOffset));
};
reader.onabort = () => reject(new Error("Read aborted"));
reader.onerror = () => reject(reader.error);
reader.readAsDataURL(blob);
});
}
exports.FetchHttpHandler = FetchHttpHandler;
exports.keepAliveSupport = keepAliveSupport;
exports.streamCollector = streamCollector;