CSP Reporting
Content Security Policy reporting for monitoring violations.
Stack Components
Why
Detect XSS attempts in production, enforce policies gradually, no breakage. Verizon DBIR 2024: 68% of breaches involve human error.
Snyk and Dependabot scan 500k+ npm packages for CVEs, and OWASP Top 10 hasn't changed much — injection and broken auth remain #1 and #2.
When
Use for web apps with XSS risk. Avoid for non-browser contexts.
How
Example
Common Problems
- ⚠Report volume — sample reports in production
- ⚠False positives — tune policy directives
- ⚠Configuration drift between environments — use infrastructure-as-code (Terraform/Pulumi) to keep dev/staging/prod identical
Best Practices
- ✓Use Report-Only before enforcing
- ✓Aggregate reports for analysis
- ✓Set up health checks and graceful shutdown — handle SIGTERM to drain in-flight requests before exit
FAQ
What is CSP Reporting and what projects is it for?
Content Security Policy reporting for monitoring violations. It pairs layered technologies for end-to-end type safety and out-of-the-box deploys, fitting everything from MVPs to production SaaS.
How do I spin up a working demo with CSP Reporting in 10 minutes?
Two steps: (1) Set CSP-Report-Only header; (2) Configure report-uri endpoint. Get the local dev server running, then wire one real data source to verify the end-to-end loop.
What is the most common pitfall with CSP Reporting and how do I avoid it?
The most common pitfall is: Report volume — sample reports in production. Avoid it by adding the matching checklist to your PR template and running type-check + lint + unit tests in CI — three gates before merge.
What are the best practices for CSP Reporting?
Best practices for CSP Reporting include: Use Report-Only before enforcing; Aggregate reports for analysis; Set up health checks and graceful shutdown — handle SIGTERM to drain in-flight requests before exit. The first one — "Use Report-Only before enforcing" — should be set up at project init to avoid costly rework later.
When should I NOT choose CSP Reporting?
Pick something else in three cases: (1) the team has zero experience with the core framework and the deadline is tight (learning-curve risk); (2) it's a pure content/marketing site (Astro is lighter); (3) you need very high throughput (>10k RPS) or strict-consistency microservices (Go/Rust). CSP Reporting shines for mid-to-high complexity full-stack and API work — don't over-engineer simple static pages with it.