tus-js-client-stall-detection/lib.esm/browser/fileSignature.js

A pure JavaScript client for the tus resumable upload protocol (fork with stall detection)

import { isReactNativeFile, isReactNativePlatform } from '../reactnative/isReactNative.js';
/**
 * Generate a fingerprint for a file which will be used the store the endpoint
 */
export function fingerprint(file, options) {
    if (isReactNativePlatform() && isReactNativeFile(file)) {
        return Promise.resolve(reactNativeFingerprint(file, options));
    }
    if (file instanceof Blob) {
        return Promise.resolve(
        //@ts-expect-error TODO: We have to check the input type here
        // This can be fixed by moving the fingerprint function to the FileReader class
        ['tus-br', file.name, file.type, file.size, file.lastModified, options.endpoint].join('-'));
    }
    return Promise.resolve(null);
}
function reactNativeFingerprint(file, options) {
    const exifHash = file.exif ? hashCode(JSON.stringify(file.exif)) : 'noexif';
    return ['tus-rn', file.name || 'noname', file.size || 'nosize', exifHash, options.endpoint].join('/');
}
function hashCode(str) {
    // from https://stackoverflow.com/a/8831937/151666
    let hash = 0;
    if (str.length === 0) {
        return hash;
    }
    for (let i = 0; i < str.length; i++) {
        const char = str.charCodeAt(i);
        hash = (hash << 5) - hash + char;
        hash &= hash; // Convert to 32bit integer
    }
    return hash;
}
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