Juergen Kunz
54afcc46e2
- Added cache strategies: NetworkFirst, CacheFirst, StaleWhileRevalidate, NetworkOnly, and CacheOnly. - Introduced InterceptorManager for managing request, response, and error interceptors. - Developed RetryManager for handling request retries with customizable backoff strategies. - Implemented RequestDeduplicator to prevent simultaneous identical requests. - Created timeout utilities for handling request timeouts. - Enhanced WebrequestClient to support global interceptors, caching, and retry logic. - Added convenience methods for common HTTP methods (GET, POST, PUT, DELETE) with JSON handling. - Established a fetch-compatible webrequest function for seamless integration. - Defined core type structures for caching, retry options, interceptors, and web request configurations.
68 lines
1.7 KiB
TypeScript
68 lines
1.7 KiB
TypeScript
/**
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* Retry backoff strategies
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*/
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import type { TBackoffStrategy } from '../webrequest.types.js';
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export interface IBackoffCalculator {
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calculate(attempt: number, initialDelay: number, maxDelay: number): number;
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}
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/**
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* Exponential backoff strategy
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* Delay increases exponentially: initialDelay * 2^attempt
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*/
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export class ExponentialBackoff implements IBackoffCalculator {
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calculate(attempt: number, initialDelay: number, maxDelay: number): number {
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const delay = initialDelay * Math.pow(2, attempt - 1);
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return Math.min(delay, maxDelay);
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}
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}
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/**
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* Linear backoff strategy
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* Delay increases linearly: initialDelay * attempt
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*/
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export class LinearBackoff implements IBackoffCalculator {
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calculate(attempt: number, initialDelay: number, maxDelay: number): number {
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const delay = initialDelay * attempt;
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return Math.min(delay, maxDelay);
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}
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}
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/**
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* Constant backoff strategy
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* Delay stays constant: initialDelay
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*/
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export class ConstantBackoff implements IBackoffCalculator {
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calculate(attempt: number, initialDelay: number, maxDelay: number): number {
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return Math.min(initialDelay, maxDelay);
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}
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}
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/**
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* Get backoff calculator for a given strategy
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*/
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export function getBackoffCalculator(
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strategy: TBackoffStrategy,
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): IBackoffCalculator {
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switch (strategy) {
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case 'exponential':
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return new ExponentialBackoff();
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case 'linear':
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return new LinearBackoff();
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case 'constant':
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return new ConstantBackoff();
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default:
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return new ExponentialBackoff();
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}
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}
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/**
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* Add jitter to delay to prevent thundering herd
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*/
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export function addJitter(delay: number, jitterFactor: number = 0.1): number {
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const jitter = delay * jitterFactor * Math.random();
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return delay + jitter;
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}
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