Home › Forums › 尹說 › unpkg.com及jsdelivr無法訪問 › index.cjs
2024-05-10 at 16:39:53
#12795
ejsoon
Keymaster
'use strict';
const testPath = "npm2url/dist/index.cjs";
const defaultProviders = {
jsdelivr: (path) => `https://cdn.jsdelivr.net/npm/${path}`,
unpkg: (path) => `https://unpkg.com/${path}`
};
async function checkUrl(url, signal) {
const res = await fetch(url, {
signal
});
if (!res.ok) {
throw res;
}
await res.text();
}
class UrlBuilder {
constructor() {
this.providers = { ...defaultProviders };
this.provider = "jsdelivr";
}
/**
* Get the fastest provider name.
* If none of the providers returns a valid response within `timeout`, an error will be thrown.
*/
async getFastestProvider(timeout = 5e3, path = testPath) {
const controller = new AbortController();
let timer = 0;
try {
return await new Promise((resolve, reject) => {
Promise.all(
Object.entries(this.providers).map(async ([name, factory]) => {
try {
await checkUrl(factory(path), controller.signal);
resolve(name);
} catch {
}
})
).then(() => reject(new Error("All providers failed")));
timer = setTimeout(reject, timeout, new Error("Timed out"));
});
} finally {
controller.abort();
clearTimeout(timer);
}
}
/**
* Set the current provider to the fastest provider found by `getFastestProvider`.
*/
async findFastestProvider(timeout, path) {
this.provider = await this.getFastestProvider(timeout, path);
return this.provider;
}
setProvider(name, factory) {
if (factory) {
this.providers[name] = factory;
} else {
delete this.providers[name];
}
}
getFullUrl(path, provider = this.provider) {
if (path.includes("://")) {
return path;
}
const factory = this.providers[provider];
if (!factory) {
throw new Error(`Provider ${provider} not found`);
}
return factory(path);
}
}
const urlBuilder = new UrlBuilder();
exports.UrlBuilder = UrlBuilder;
exports.urlBuilder = urlBuilder;