Update Yahoo Finance API Authentication#4
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Yahoo Finance tightened their cookie/crumb authentication in mid-2023, causing frequent "Invalid Cookie" and "Invalid Crumb" errors. This update implements a more robust authentication system: - Add Session singleton class with 60-second TTL for cookie/crumb - Implement three fallback authentication strategies: 1. fc.yahoo.com cookie + query1 crumb endpoint 2. Homepage scraping for embedded crumb 3. fc.yahoo.com cookie + query2 crumb endpoint - Add retry logic (max 2 retries) on auth errors with session refresh - Add custom error classes (AuthenticationError, RateLimitError) - Remove debug pp statement from stock.rb Bumps version to 0.2.0. Public API remains unchanged. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Problem
The current implementation uses a cookie/crumb authentication flow that Yahoo Finance tightened in mid-2023:
/v1/test/getcrumbendpoint may failResearch Summary
Sources:
Working approaches from other libraries:
"crumb":"([^"]+)"Solution
Implement multi-strategy authentication with fallback mechanisms while maintaining backwards compatibility.