@aws-amplify/storage
Version:
Storage category of aws-amplify
78 lines (75 loc) • 3.13 kB
JavaScript
import { getAmplifyUserAgent, AmplifyUrl } from '@aws-amplify/core/internals/utils';
import { getRetryDecider, jitteredBackoff, getDnsSuffix } from '@aws-amplify/core/internals/aws-client-utils';
import { parseXmlError } from './utils/parsePayload.mjs';
import './runtime/s3TransferHandler/fetch.mjs';
import 'fast-xml-parser';
import './runtime/s3TransferHandler/xhr.mjs';
import 'buffer';
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
const DOMAIN_PATTERN = /^[a-z0-9][a-z0-9\.\-]{1,61}[a-z0-9]$/;
const IP_ADDRESS_PATTERN = /(\d+\.){3}\d+/;
const DOTS_PATTERN = /\.\./;
/**
* The service name used to sign requests if the API requires authentication.
*/
const SERVICE_NAME = 's3';
/**
* The endpoint resolver function that returns the endpoint URL for a given region, and input parameters.
*/
const endpointResolver = (options, apiInput) => {
const { region, useAccelerateEndpoint, customEndpoint, forcePathStyle } = options;
let endpoint;
// 1. get base endpoint
if (customEndpoint) {
endpoint = new AmplifyUrl(customEndpoint);
}
else if (useAccelerateEndpoint) {
if (forcePathStyle) {
throw new Error('Path style URLs are not supported with S3 Transfer Acceleration.');
}
endpoint = new AmplifyUrl(`https://s3-accelerate.${getDnsSuffix(region)}`);
}
else {
endpoint = new AmplifyUrl(`https://s3.${region}.${getDnsSuffix(region)}`);
}
// 2. inject bucket name
if (apiInput?.Bucket) {
if (!isDnsCompatibleBucketName(apiInput.Bucket)) {
throw new Error(`Invalid bucket name: "${apiInput.Bucket}".`);
}
if (forcePathStyle || apiInput.Bucket.includes('.')) {
endpoint.pathname = `/${apiInput.Bucket}`;
}
else {
endpoint.host = `${apiInput.Bucket}.${endpoint.host}`;
}
}
return { url: endpoint };
};
/**
* Determines whether a given string is DNS compliant per the rules outlined by
* S3. Length, capitaization, and leading dot restrictions are enforced by the
* DOMAIN_PATTERN regular expression.
* @internal
*
* @see https://github.com/aws/aws-sdk-js-v3/blob/f2da6182298d4d6b02e84fb723492c07c27469a8/packages/middleware-bucket-endpoint/src/bucketHostnameUtils.ts#L39-L48
* @see https://docs.aws.amazon.com/AmazonS3/latest/dev/BucketRestrictions.html
*/
const isDnsCompatibleBucketName = (bucketName) => DOMAIN_PATTERN.test(bucketName) &&
!IP_ADDRESS_PATTERN.test(bucketName) &&
!DOTS_PATTERN.test(bucketName);
/**
* @internal
*/
const defaultConfig = {
service: SERVICE_NAME,
endpointResolver,
retryDecider: getRetryDecider(parseXmlError),
computeDelay: jitteredBackoff,
userAgentValue: getAmplifyUserAgent(),
useAccelerateEndpoint: false,
uriEscapePath: false, // Required by S3. See https://github.com/aws/aws-sdk-js-v3/blob/9ba012dfa3a3429aa2db0f90b3b0b3a7a31f9bc3/packages/signature-v4/src/SignatureV4.ts#L76-L83
};
export { SERVICE_NAME, defaultConfig, isDnsCompatibleBucketName };
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