@flatfile/safe-api/dist/utils/rate-limit.js

Flatfile Safe API client with streaming capabilities

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RateLimitManager = void 0;
const config_1 = require("./config");
class RateLimitManager {
    constructor() {
        this.config = config_1.config;
    }
    static getInstance() {
        if (!RateLimitManager.instance) {
            RateLimitManager.instance = new RateLimitManager();
        }
        return RateLimitManager.instance;
    }
    shouldRetry(status) {
        const should = status === 429;
        if (this.config.debug) {
            console.log(`DEBUG: RateLimitManager: Should retry status ${status}? ${should}`);
        }
        return should;
    }
    getRetryDelay(headers) {
        // Use retry-after header if present
        const retryAfter = headers.get('retry-after');
        if (retryAfter) {
            const seconds = parseInt(retryAfter, 10);
            if (!isNaN(seconds)) {
                const delay = (seconds * 1000) + (Math.random() * 1000);
                if (this.config.debug) {
                    console.log(`DEBUG: RateLimitManager: Using retry-after header. Delay: ${delay}ms`);
                }
                return delay;
            }
        }
        // Fallback to x-ratelimit-reset if present
        const reset = parseInt(headers.get('x-ratelimit-reset') || '0', 10);
        if (reset) {
            const now = Date.now() / 1000; // Convert to seconds
            const baseDelay = Math.max(1000, (reset - now) * 1000); // Minimum 1 second delay
            const delay = baseDelay + (Math.random() * 1000);
            if (this.config.debug) {
                console.log(`DEBUG: RateLimitManager: Using x-ratelimit-reset header. Delay: ${delay}ms`);
            }
            return delay;
        }
        // Default exponential backoff with jitter if no headers present
        const delay = 5000 + (Math.random() * 1000);
        if (this.config.debug) {
            console.log(`DEBUG: RateLimitManager: No rate limit headers found. Using default delay: ${delay}ms`);
        }
        return delay;
    }
}
exports.RateLimitManager = RateLimitManager;