minio
Version:
S3 Compatible Cloud Storage client
75 lines (72 loc) • 10.6 kB
JavaScript
import { pipeline } from "stream";
import { promisify } from "util";
const pipelineAsync = promisify(pipeline);
export async function request(transport, opt, body = null) {
return new Promise((resolve, reject) => {
const requestObj = transport.request(opt, response => {
resolve(response);
});
requestObj.on('error', reject);
if (!body || Buffer.isBuffer(body) || typeof body === 'string') {
requestObj.end(body);
} else {
pipelineAsync(body, requestObj).catch(reject);
}
});
}
const MAX_RETRIES = 10;
const EXP_BACK_OFF_BASE_DELAY = 1000; // Base delay for exponential backoff
const ADDITIONAL_DELAY_FACTOR = 1.0; // to avoid synchronized retries
// Retryable error codes for HTTP ( ref: minio-go)
export const retryHttpCodes = {
408: true,
429: true,
499: true,
500: true,
502: true,
503: true,
504: true,
520: true
};
const isHttpRetryable = httpResCode => {
return retryHttpCodes[httpResCode] !== undefined;
};
const sleep = ms => {
return new Promise(resolve => setTimeout(resolve, ms));
};
const getExpBackOffDelay = retryCount => {
const backOffBy = EXP_BACK_OFF_BASE_DELAY * 2 ** retryCount;
const additionalDelay = Math.random() * backOffBy * ADDITIONAL_DELAY_FACTOR;
return backOffBy + additionalDelay;
};
export async function requestWithRetry(transport, opt, body = null, maxRetries = MAX_RETRIES) {
let attempt = 0;
let isRetryable = false;
while (attempt <= maxRetries) {
try {
const response = await request(transport, opt, body);
// Check if the HTTP status code is retryable
if (isHttpRetryable(response.statusCode)) {
isRetryable = true;
throw new Error(`Retryable HTTP status: ${response.statusCode}`); // trigger retry attempt with calculated delay
}
return response; // Success, return the raw response
} catch (err) {
if (isRetryable) {
attempt++;
isRetryable = false;
if (attempt > maxRetries) {
throw new Error(`Request failed after ${maxRetries} retries: ${err}`);
}
const delay = getExpBackOffDelay(attempt);
// eslint-disable-next-line no-console
console.warn(`${new Date().toLocaleString()} Retrying request (attempt ${attempt}/${maxRetries}) after ${delay}ms due to: ${err}`);
await sleep(delay);
} else {
throw err; // re-throw if any request, syntax errors
}
}
}
throw new Error(`${MAX_RETRIES} Retries exhausted, request failed.`);
}
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transport: Transport,\n  opt: https.RequestOptions,\n  body: Buffer | string | stream.Readable | null = null,\n): Promise<http.IncomingMessage> {\n  return new Promise<http.IncomingMessage>((resolve, reject) => {\n    const requestObj = transport.request(opt, (response) => {\n      resolve(response)\n    })\n\n    requestObj.on('error', reject)\n\n    if (!body || Buffer.isBuffer(body) || typeof body === 'string') {\n      requestObj.end(body)\n    } else {\n      pipelineAsync(body, requestObj).catch(reject)\n    }\n  })\n}\n\nconst MAX_RETRIES = 10\nconst EXP_BACK_OFF_BASE_DELAY = 1000 // Base delay for exponential backoff\nconst ADDITIONAL_DELAY_FACTOR = 1.0 // to avoid synchronized retries\n\n// Retryable error codes for HTTP ( ref: minio-go)\nexport const retryHttpCodes: Record<string, boolean> = {\n  408: true,\n  429: true,\n  499: true,\n  500: true,\n  502: true,\n  503: true,\n  504: true,\n  520: true,\n}\n\nconst isHttpRetryable = (httpResCode: number) => {\n  return retryHttpCodes[httpResCode] !== undefined\n}\n\nconst sleep = (ms: number) => {\n  return new Promise((resolve) => setTimeout(resolve, ms))\n}\n\nconst getExpBackOffDelay = (retryCount: number) => {\n  const backOffBy = EXP_BACK_OFF_BASE_DELAY * 2 ** retryCount\n  const additionalDelay = Math.random() * backOffBy * ADDITIONAL_DELAY_FACTOR\n  return backOffBy + additionalDelay\n}\n\nexport async function requestWithRetry(\n  transport: Transport,\n  opt: https.RequestOptions,\n  body: Buffer | string | stream.Readable | null = null,\n  maxRetries: number = MAX_RETRIES,\n): Promise<http.IncomingMessage> {\n  let attempt = 0\n  let isRetryable = false\n  while (attempt <= maxRetries) {\n    try {\n      const response = await request(transport, opt, body)\n      // Check if the HTTP status code is retryable\n      if (isHttpRetryable(response.statusCode as number)) {\n        isRetryable = true\n        throw new Error(`Retryable HTTP status: ${response.statusCode}`) // trigger retry attempt with calculated delay\n      }\n\n      return response // Success, return the raw response\n    } catch (err) {\n      if (isRetryable) {\n        attempt++\n        isRetryable = false\n\n        if (attempt > maxRetries) {\n          throw new Error(`Request failed after ${maxRetries} retries: ${err}`)\n        }\n        const delay = getExpBackOffDelay(attempt)\n        // eslint-disable-next-line no-console\n        console.warn(\n          `${new Date().toLocaleString()} Retrying request (attempt ${attempt}/${maxRetries}) after ${delay}ms due to: ${err}`,\n        )\n        await sleep(delay)\n      } else {\n        throw err // re-throw if any request, syntax errors\n      }\n    }\n  }\n\n  throw new Error(`${MAX_RETRIES} Retries exhausted, request 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