@angular/service-worker
Version:
Angular - service worker tooling!
226 lines (221 loc) • 7.34 kB
JavaScript
/**
* @license Angular v21.0.8
* (c) 2010-2025 Google LLC. https://angular.dev/
* License: MIT
*/
const PARSE_TO_PAIRS = /([0-9]+[^0-9]+)/g;
const PAIR_SPLIT = /^([0-9]+)([dhmsu]+)$/;
function parseDurationToMs(duration) {
const matches = [];
let array;
while ((array = PARSE_TO_PAIRS.exec(duration)) !== null) {
matches.push(array[0]);
}
return matches.map(match => {
const res = PAIR_SPLIT.exec(match);
if (res === null) {
throw new Error(`Not a valid duration: ${match}`);
}
let factor = 0;
switch (res[2]) {
case 'd':
factor = 86400000;
break;
case 'h':
factor = 3600000;
break;
case 'm':
factor = 60000;
break;
case 's':
factor = 1000;
break;
case 'u':
factor = 1;
break;
default:
throw new Error(`Not a valid duration unit: ${res[2]}`);
}
return parseInt(res[1]) * factor;
}).reduce((total, value) => total + value, 0);
}
const QUESTION_MARK = '[^/]';
const WILD_SINGLE = '[^/]*';
const WILD_OPEN = '(?:.+\\/)?';
const TO_ESCAPE_BASE = [{
replace: /\./g,
with: '\\.'
}, {
replace: /\+/g,
with: '\\+'
}, {
replace: /\*/g,
with: WILD_SINGLE
}];
const TO_ESCAPE_WILDCARD_QM = [...TO_ESCAPE_BASE, {
replace: /\?/g,
with: QUESTION_MARK
}];
const TO_ESCAPE_LITERAL_QM = [...TO_ESCAPE_BASE, {
replace: /\?/g,
with: '\\?'
}];
function globToRegex(glob, literalQuestionMark = false) {
const toEscape = literalQuestionMark ? TO_ESCAPE_LITERAL_QM : TO_ESCAPE_WILDCARD_QM;
const segments = glob.split('/').reverse();
let regex = '';
while (segments.length > 0) {
const segment = segments.pop();
if (segment === '**') {
if (segments.length > 0) {
regex += WILD_OPEN;
} else {
regex += '.*';
}
} else {
const processed = toEscape.reduce((segment, escape) => segment.replace(escape.replace, escape.with), segment);
regex += processed;
if (segments.length > 0) {
regex += '\\/';
}
}
}
return regex;
}
const DEFAULT_NAVIGATION_URLS = ['/**', '!/**/*.*', '!/**/*__*', '!/**/*__*/**'];
class Generator {
fs;
baseHref;
constructor(fs, baseHref) {
this.fs = fs;
this.baseHref = baseHref;
}
async process(config) {
const unorderedHashTable = {};
const assetGroups = await this.processAssetGroups(config, unorderedHashTable);
return {
configVersion: 1,
timestamp: Date.now(),
appData: config.appData,
index: joinUrls(this.baseHref, config.index),
assetGroups,
dataGroups: this.processDataGroups(config),
hashTable: withOrderedKeys(unorderedHashTable),
navigationUrls: processNavigationUrls(this.baseHref, config.navigationUrls),
navigationRequestStrategy: config.navigationRequestStrategy ?? 'performance',
applicationMaxAge: config.applicationMaxAge ? parseDurationToMs(config.applicationMaxAge) : undefined
};
}
async processAssetGroups(config, hashTable) {
const allFiles = await this.fs.list('/');
const seenMap = new Set();
const filesPerGroup = new Map();
for (const group of config.assetGroups || []) {
if (group.resources.versionedFiles) {
throw new Error(`Asset-group '${group.name}' in 'ngsw-config.json' uses the 'versionedFiles' option, ` + "which is no longer supported. Use 'files' instead.");
}
const fileMatcher = globListToMatcher(group.resources.files || []);
const matchedFiles = allFiles.filter(fileMatcher).filter(file => !seenMap.has(file)).sort();
matchedFiles.forEach(file => seenMap.add(file));
filesPerGroup.set(group, matchedFiles);
}
const allMatchedFiles = [].concat(...Array.from(filesPerGroup.values())).sort();
const allMatchedHashes = await processInBatches(allMatchedFiles, 500, file => this.fs.hash(file));
allMatchedFiles.forEach((file, idx) => {
hashTable[joinUrls(this.baseHref, file)] = allMatchedHashes[idx];
});
return Array.from(filesPerGroup.entries()).map(([group, matchedFiles]) => ({
name: group.name,
installMode: group.installMode || 'prefetch',
updateMode: group.updateMode || group.installMode || 'prefetch',
cacheQueryOptions: buildCacheQueryOptions(group.cacheQueryOptions),
urls: matchedFiles.map(url => joinUrls(this.baseHref, url)),
patterns: (group.resources.urls || []).map(url => urlToRegex(url, this.baseHref, true))
}));
}
processDataGroups(config) {
return (config.dataGroups || []).map(group => {
return {
name: group.name,
patterns: group.urls.map(url => urlToRegex(url, this.baseHref, true)),
strategy: group.cacheConfig.strategy || 'performance',
maxSize: group.cacheConfig.maxSize,
maxAge: parseDurationToMs(group.cacheConfig.maxAge),
timeoutMs: group.cacheConfig.timeout && parseDurationToMs(group.cacheConfig.timeout),
refreshAheadMs: group.cacheConfig.refreshAhead && parseDurationToMs(group.cacheConfig.refreshAhead),
cacheOpaqueResponses: group.cacheConfig.cacheOpaqueResponses,
cacheQueryOptions: buildCacheQueryOptions(group.cacheQueryOptions),
version: group.version !== undefined ? group.version : 1
};
});
}
}
function processNavigationUrls(baseHref, urls = DEFAULT_NAVIGATION_URLS) {
return urls.map(url => {
const positive = !url.startsWith('!');
url = positive ? url : url.slice(1);
return {
positive,
regex: `^${urlToRegex(url, baseHref)}$`
};
});
}
async function processInBatches(items, batchSize, processFn) {
const batches = [];
for (let i = 0; i < items.length; i += batchSize) {
batches.push(items.slice(i, i + batchSize));
}
return batches.reduce(async (prev, batch) => (await prev).concat(await Promise.all(batch.map(item => processFn(item)))), Promise.resolve([]));
}
function globListToMatcher(globs) {
const patterns = globs.map(pattern => {
if (pattern.startsWith('!')) {
return {
positive: false,
regex: new RegExp('^' + globToRegex(pattern.slice(1)) + '$')
};
} else {
return {
positive: true,
regex: new RegExp('^' + globToRegex(pattern) + '$')
};
}
});
return file => matches(file, patterns);
}
function matches(file, patterns) {
return patterns.reduce((isMatch, pattern) => {
if (pattern.positive) {
return isMatch || pattern.regex.test(file);
} else {
return isMatch && !pattern.regex.test(file);
}
}, false);
}
function urlToRegex(url, baseHref, literalQuestionMark) {
if (!url.startsWith('/') && url.indexOf('://') === -1) {
url = joinUrls(baseHref.replace(/^\.(?=\/)/, ''), url);
}
return globToRegex(url, literalQuestionMark);
}
function joinUrls(a, b) {
if (a.endsWith('/') && b.startsWith('/')) {
return a + b.slice(1);
} else if (!a.endsWith('/') && !b.startsWith('/')) {
return a + '/' + b;
}
return a + b;
}
function withOrderedKeys(unorderedObj) {
const orderedObj = {};
Object.keys(unorderedObj).sort().forEach(key => orderedObj[key] = unorderedObj[key]);
return orderedObj;
}
function buildCacheQueryOptions(inOptions) {
return {
ignoreVary: true,
...inOptions
};
}
export { Generator };
//# sourceMappingURL=config.mjs.map