next/dist/shared/lib/router/utils/cache-busting-search-param.js

The React Framework

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
0 && (module.exports = {
    computeCacheBustingSearchParam: null,
    computeLegacyCacheBustingSearchParam: null
});
function _export(target, all) {
    for(var name in all)Object.defineProperty(target, name, {
        enumerable: true,
        get: all[name]
    });
}
_export(exports, {
    computeCacheBustingSearchParam: function() {
        return computeCacheBustingSearchParam;
    },
    computeLegacyCacheBustingSearchParam: function() {
        return computeLegacyCacheBustingSearchParam;
    }
});
const _hash = require("../../hash");
const CACHE_BUSTING_SEARCH_PARAM_DIGEST_BYTES = 12;
const textEncoder = new TextEncoder();
function encodeCacheBustingSearchParam(bytes) {
    let binary = '';
    for(let i = 0; i < bytes.length; i++){
        binary += String.fromCharCode(bytes[i]);
    }
    return btoa(binary).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
}
function normalizeCacheBustingInput(value) {
    if (value === undefined) {
        return '0';
    }
    return Array.isArray(value) ? value.join(',') : value;
}
function createCacheBustingSearchParamInput(prefetchHeader, segmentPrefetchHeader, stateTreeHeader, nextUrlHeader) {
    if ((prefetchHeader === undefined || prefetchHeader === '0') && segmentPrefetchHeader === undefined && stateTreeHeader === undefined && nextUrlHeader === undefined) {
        return null;
    }
    return [
        prefetchHeader ?? '0',
        normalizeCacheBustingInput(segmentPrefetchHeader),
        normalizeCacheBustingInput(stateTreeHeader),
        normalizeCacheBustingInput(nextUrlHeader)
    ].join(',');
}
async function computeCacheBustingSearchParamFromInput(input) {
    // Truncate SHA-256 to 96 bits to keep `_rsc` compact
    const digest = await globalThis.crypto.subtle.digest('SHA-256', textEncoder.encode(input));
    return encodeCacheBustingSearchParam(new Uint8Array(digest).subarray(0, CACHE_BUSTING_SEARCH_PARAM_DIGEST_BYTES));
}
async function computeCacheBustingSearchParam(prefetchHeader, segmentPrefetchHeader, stateTreeHeader, nextUrlHeader) {
    const input = createCacheBustingSearchParamInput(prefetchHeader, segmentPrefetchHeader, stateTreeHeader, nextUrlHeader);
    if (input === null) {
        return '';
    }
    return computeCacheBustingSearchParamFromInput(input);
}
function computeLegacyCacheBustingSearchParam(prefetchHeader, segmentPrefetchHeader, stateTreeHeader, nextUrlHeader) {
    const input = createCacheBustingSearchParamInput(prefetchHeader, segmentPrefetchHeader, stateTreeHeader, nextUrlHeader);
    if (input === null) {
        return '';
    }
    return (0, _hash.hexHash)(input);
}

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