HTTP Semantics References

Redirects

• 307 Temporary Redirect — Preserves method and body (MDN, RFC 9110 §15.4.8)
• 308 Permanent Redirect — Preserves method and body (MDN, RFC 9110 §15.4.9)
• 303 See Other — Converts to GET (opt-in via follow303) (MDN, RFC 9110 §15.4.4)

redirectPolicy({ allow: [307, 308], follow303: false });

Rate Limiting

• 429 Too Many Requests + Retry-After (MDN, RFC 6585)
• 503 Service Unavailable + Retry-After (MDN, RFC 9110 §15.6.4)

import { retry } from '@unireq/core';
import { httpRetryPredicate, rateLimitDelay } from '@unireq/http';

retry(
  httpRetryPredicate({ statusCodes: [429, 503] }),
  [rateLimitDelay({ maxWait: 60000 })],
  { tries: 3 }
);

Range Requests

• 206 Partial Content — Server sends requested byte range (MDN, RFC 7233)
• 416 Range Not Satisfiable — Invalid range (MDN, RFC 7233 §4.4)
• Accept-Ranges: bytes — Server supports ranges (MDN)

range({ start: 0, end: 1023 }); // Request first 1KB
resume({ downloaded: 5000 }); // Resume from byte 5000

Multipart Form Data

• RFC 7578 — multipart/form-data (spec)

multipart(
  [{ name: 'file', filename: 'doc.pdf', data: blob, contentType: 'application/pdf' }],
  [{ name: 'title', value: 'My Document' }]
);

OAuth 2.0 Bearer

• RFC 6750 — Bearer token usage (spec)

oauthBearer({
  tokenSupplier: async () => getAccessToken(),
  skew: 60, // Clock skew tolerance (seconds)
  autoRefresh: true // Refresh on 401
});

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