Windsurf
storage
Signed URLs Expiring Too Fast in Windsurf App
Images, documents, and file download links in your Windsurf-generated app break after a short time. Users see broken images, get access denied errors when clicking download links, or see files that loaded fine moments ago now showing 403 Forbidden errors.
This happens because your app uses signed URLs to serve files from private cloud storage (Supabase Storage, S3, or GCS), and the URLs expire too quickly. Cascade may have set a very short expiration time, or the URLs are being generated once and cached while the expiration passes.
The issue is especially frustrating for users because everything appears to work initially, then breaks silently. Pages that worked fine a few minutes ago suddenly show broken images everywhere.
Error Messages You Might See
403 Forbidden: Request has expired
AccessDenied: Request has expired
The provided token has expired
SignatureDoesNotMatch
Error: URL signature expired
Common Causes
- Default short expiration — Cascade used the default signed URL expiration (often 60 seconds) without increasing it for the use case
- URLs cached but not refreshed — Signed URLs are generated once at page load and stored in state, but not regenerated when they expire
- Server-side rendering with stale URLs — URLs generated during SSR are already partially expired by the time the client receives them
- Email or notification links — Signed URLs sent in emails expire before the recipient opens the message
- CDN caching conflicts — A CDN caches the page with signed URLs, but the URLs expire before the CDN cache does
How to Fix It
- Increase signed URL expiration — Set expiration to match your use case: 1 hour for page views, 24 hours for download links, 7 days for email links
- Implement URL refresh logic — Create a client-side mechanism that regenerates signed URLs before they expire, or on 403 errors
- Use public buckets for non-sensitive files — If the files aren't private (like product images), make the bucket public and skip signed URLs entirely
- Add a redirect endpoint — For email links, create a permanent URL (/files/:id/download) that generates a fresh signed URL and redirects
- Set CDN cache to match URL expiration — Ensure CDN cache-control headers expire before the signed URLs they contain
Real developers can help you.
rayush33
JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems
Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations.
Beyond coding, I care about **software quality and architecture**, following best practices for componentization, code organization, and performance optimization.
I'm also comfortable working across the stack when needed, integrating APIs, handling business logic, and helping transform prototypes into production-ready systems.
My goal is always to deliver solutions that are **simple, efficient, and genuinely useful for the people using them.**
Tejas Chokhawala
Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript.
Focused on performance, clean architecture and shipping fast.
Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools.
Jacek Rozanski
Senior PHP/Symfony developer and DevOps engineer with 20+ years of professional experience, running opcode.pl (web development agency, est. 2004).
Day job: I'm the sole backend developer at merketing company where I own and maintain 11 PHP/Symfony microservices on AWS (ECS Fargate, RDS, S3, CloudFront), handle the full CI/CD pipeline (Bitbucket Pipelines, Docker), and manage monitoring with Sentry and CloudWatch. These services handle high request volumes in production every month.
What I bring to AI-built apps:
- I audit and fix security issues (OWASP methodology), performance bottlenecks, and architectural problems in codebases generated by Cursor, Claude Code, Lovable, Bolt, and v0
- I refactor AI-generated prototypes into production-grade applications with proper error handling, testing, and clean architecture (SOLID, DDD, hexagonal architecture)
- I set up the infrastructure AI tools don't touch: AWS hosting, CI/CD pipelines, automated deployments, database optimization, monitoring, and alerting
- I integrate external services: payment providers, email systems, partner APIs, SSO/auth
Tech stack: PHP 8.x, Symfony, React, Next.js, PostgreSQL, MySQL, Docker, AWS (ECS, RDS, S3, SQS/SNS, CloudFront), Terraform, Supabase. I also use AI tools daily (Claude Code, Cursor) in my own workflow, so I understand both the strengths and the gaps in AI-generated code.
Based in Poland (CET timezone). Available for async work and calls during EU/US business hours.
Alvin Voo
I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing.
My expertise lies in the critical backend infrastructure: the parts that must be fast, secure, and scalable. I thrive on high-pressure environments, such as when I had only three weeks to architect and launch an Ethereum redemption system with minimal prior crypto knowledge, turning it into a major revenue stream.
What I bring to your project:
Forensic Debugging: I don't just "patch" bugs; I use tools like Datadog and Explain Analyzers to map out bottlenecks and resolve root causes—like significantly reducing memory usage by optimizing complex DB joins.
Full-Stack Context: Deep experience in Node.js and React, ensuring backends play perfectly with mobile and web teams.
Sanity in the Age of AI: I bridge the gap between "best practices" and modern speed, ensuring your project isn't just built fast, but built to last.
Yovel Cohen
I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well.
Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
Jen Jacobsen
I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses.
I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain.
legrab
I'll fill this later
Bastien Labelle
Full stack dev w/ 20+ years of experience
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How long should I set signed URL expiration?
It depends on the use case. For images displayed on pages: 1-4 hours. For download links: 24 hours. For links in emails: 7 days. For public content that doesn't need access control, skip signed URLs and use public buckets.
Can signed URLs be extended after they are created?
No. Once a signed URL is generated, its expiration is fixed. You must generate a new signed URL. Design your app to either refresh URLs before expiry or use a redirect endpoint that generates fresh URLs on demand.