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| import https from 'https' | |
| import timer from '@szmarczak/http-timer' | |
| // a wrapper around genAsyncRequest that will retry the request 5 times if it fails | |
| export async function genRetryableRequest(url) { | |
| let retries = 0 | |
| while (retries < 10) { | |
| try { | |
| return await genAsyncRequest(url) | |
| } catch (err) {} | |
| retries++ | |
| } | |
| throw new Error(`Failed to fetch ${url}, too many retries`) | |
| } | |
| // a wrapper around http.request that is enhanced with timing information | |
| async function genAsyncRequest(url) { | |
| return new Promise((resolve, reject) => { | |
| const request = https.get(url) | |
| timer(request) | |
| request.on('response', (response) => { | |
| let body = '' | |
| response.on('data', (data) => { | |
| body += data | |
| }) | |
| response.on('end', () => { | |
| if (response.statusCode !== 200) { | |
| reject(new Error(`Failed to fetch ${url}`)) | |
| } | |
| resolve({ | |
| ...response.timings.phases, | |
| cold: !body.includes('HOT'), | |
| }) | |
| }) | |
| response.on('error', (err) => { | |
| reject(err) | |
| }) | |
| }) | |
| request.on('error', (err) => { | |
| reject(err) | |
| }) | |
| }) | |
| } | |