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import {UsageError} from 'clipanion';
import {RequestOptions} from 'https';
import {IncomingMessage, ClientRequest} from 'http';
export async function fetchUrlStream(url: string, options: RequestOptions = {}) {
if (process.env.COREPACK_ENABLE_NETWORK === `0`)
throw new UsageError(`Network access disabled by the environment; can't reach ${url}`);
const {default: https} = await import(`https`);
const {ProxyAgent} = await import(`proxy-agent`);
const proxyAgent = new ProxyAgent();
return new Promise<IncomingMessage>((resolve, reject) => {
const createRequest = (url: string) => {
const request: ClientRequest = https.get(url, {...options, agent: proxyAgent}, response => {
const statusCode = response.statusCode;
if ([301, 302, 307, 308].includes(statusCode as number) && response.headers.location)
return createRequest(response.headers.location as string);
if (statusCode != null && statusCode >= 200 && statusCode < 300)
return resolve(response);
return reject(new Error(`Server answered with HTTP ${statusCode} when performing the request to ${url}; for troubleshooting help, see https://github.com/nodejs/corepack#troubleshooting`));
});
request.on(`error`, err => {
reject(new Error(`Error when performing the request to ${url}; for troubleshooting help, see https://github.com/nodejs/corepack#troubleshooting`));
});
};
createRequest(url);
});
}
export async function fetchAsBuffer(url: string, options?: RequestOptions) {
const response = await fetchUrlStream(url, options);
return new Promise<Buffer>((resolve, reject) => {
const chunks: Array<Buffer> = [];
response.on(`data`, chunk => {
chunks.push(chunk);
});
response.on(`error`, error => {
reject(error);
});
response.on(`end`, () => {
resolve(Buffer.concat(chunks));
});
});
}
export async function fetchAsJson(url: string, options?: RequestOptions) {
const buffer = await fetchAsBuffer(url, options);
const asText = buffer.toString();
try {
return JSON.parse(asText);
} catch (error) {
const truncated = asText.length > 30
? `${asText.slice(0, 30)}...`
: asText;
throw new Error(`Couldn't parse JSON data: ${JSON.stringify(truncated)}`);
}
}
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