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Edge Middleware
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Edge Middleware
Core details
Title
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Description
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Edge Middleware runs code at CDN edge before requests reach origin, for auth, rewrites, A/B, headers. Low latency, stateless.
Category
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Usage & Trade-offs
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When to use it
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Use Edge Middleware when: - Geo routing. - Auth headers. - Image opt. - Bot blocking.
Pros
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- Near user speed. - No cold starts. - Global. - Simple JS. - Observability.
Cons
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- CPU limits. - No FS/state. - Vendor specific. - Debug hard. - Cost per invoke.
Notes
Note: Next.js middleware.ts. Return NextResponse. Cache headers.
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