@aws-amplify/storage/dist/esm/providers/s3/utils/md5.native.mjs

Storage category of aws-amplify

import { Buffer } from 'buffer';
import { Md5 } from '@smithy/md5-js';
import '@aws-amplify/core/internals/aws-client-utils';
import './client/runtime/s3TransferHandler/fetch.mjs';
import 'fast-xml-parser';
import './client/runtime/s3TransferHandler/xhr.mjs';
import { toBase64 } from './client/runtime/base64/index.native.mjs';
import '@aws-amplify/core/internals/utils';

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
// The FileReader in React Native 0.71 did not support `readAsArrayBuffer`. This native implementation accomodates this
// by attempting to use `readAsArrayBuffer` and changing the file reading strategy if it throws an error.
// TODO: This file should be removable when we drop support for React Native 0.71
const calculateContentMd5 = async (content) => {
    const hasher = new Md5();
    const buffer = content instanceof Blob ? await readFile(content) : content;
    hasher.update(buffer);
    const digest = await hasher.digest();
    return toBase64(digest);
};
const readFile = (file) => new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => {
        resolve(reader.result);
    };
    reader.onabort = () => {
        reject(new Error('Read aborted'));
    };
    reader.onerror = () => {
        reject(reader.error);
    };
    try {
        reader.readAsArrayBuffer(file);
    }
    catch (e) {
        reader.onload = () => {
            // reference: https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsDataURL
            // response from readAsDataURL is always prepended with "data:*/*;base64,"
            const [, base64Data] = reader.result.split(',');
            const arrayBuffer = Buffer.from(base64Data, 'base64');
            resolve(arrayBuffer);
        };
        reader.readAsDataURL(file);
    }
});

export { calculateContentMd5 };
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