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32 lines
726 B
Markdown
32 lines
726 B
Markdown
# Rate Limiting Principles
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> Protect your API from abuse and overload.
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## Why Rate Limit
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```
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Protect against:
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├── Brute force attacks
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├── Resource exhaustion
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├── Cost overruns (if pay-per-use)
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└── Unfair usage
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```
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## Strategy Selection
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| Type | How | When |
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|------|-----|------|
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| **Token bucket** | Burst allowed, refills over time | Most APIs |
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| **Sliding window** | Smooth distribution | Strict limits |
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| **Fixed window** | Simple counters per window | Basic needs |
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## Response Headers
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```
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Include in headers:
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├── X-RateLimit-Limit (max requests)
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├── X-RateLimit-Remaining (requests left)
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├── X-RateLimit-Reset (when limit resets)
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└── Return 429 when exceeded
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```
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