HTTP
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523 Origin Is Unreachable
Cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
当您看到此代码时
When Cloudflare's DNS for the origin fails to resolve.
如何修复
Verify DNS records in Cloudflare dashboard. Check origin server's IP address.
指南
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HTTP Caching: Cache-Control, ETags, and 304 Responses
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401 Unauthorized vs 403 Forbidden: When to Use Each
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Essential HTTP Security Headers
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Complete Guide to HTTP Methods: GET, POST, PUT, PATCH, DELETE
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How to Implement and Handle Rate Limiting (429)
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API Versioning Strategies: URL, Header, and Query Param
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Designing Consistent API Error Responses
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JSON Web Tokens: Structure, Signing, and Common Pitfalls
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