Vary: how caches keep two versions of one URL apart
How the Vary response header tells a cache which request fields a response depends on, and why Vary: * blocks reuse without revalidation.
Wildness 1/5 · Tamed
Topic · 16 stories
http
16 stories tagged http on AI Tamer, newest first.
If-Match: how HTTP stops two editors clobbering each other
How the If-Match header and strong entity tags implement optimistic locking, so a slower editor can't silently overwrite a faster one.
Wildness 1/5 · TamedThe three timeouts every network call needs
A network call can hang while connecting, while waiting for the next byte, or by dribbling data forever. Connect, read and total timeouts each cover one of those, and some clients set none by default.
Wildness 1/5 · TamedA Cache Can Serve Stale Content Under an Explicit Contract
stale-while-revalidate and stale-if-error permit different kinds of bounded staleness. Their windows start after freshness ends, and each trades current data for a specific benefit.
Wildness 1/5 · TamedAn HTTP Redirect Can Change the Request Method
A POST followed by a redirect can become a GET or remain a POST. The choice between 303, 307, 308, and historic 301/302 behavior changes what a form or API client sends next.
Wildness 1/5 · TamedThe Crawler That Checks for Changes
A source crawler can ask whether a page has changed before downloading it again. HTTP conditional requests provide the signal.
Wildness 2/5 · Mostly tamedResume a Model Download Safely
A partial download is useful only when the remaining bytes belong to the same file. HTTP range requests and validators let you check before appending.
Wildness 2/5 · Mostly tamedKeep the Error Body and the Failing Exit Code
Use curl --fail-with-body when a script needs to detect an HTTP error and keep the response text that explains it.
Wildness 1/5 · Tamed“Accepted” Is Too Easy to Hear as “Done”
HTTP 202 means a request was accepted while processing remains unfinished. An asynchronous AI job needs a place where people can learn its outcome.
Wildness 2/5 · Mostly tamed`Vary` Makes One URL Mean Several Cached Responses
A cached response can depend on request headers as well as the URL. `Vary` tells caches which headers to compare before reuse.
Wildness 2/5 · Mostly tamedThe URL Fragment Is Removed Before Retrieval
The part after # points into a retrieved resource. It is removed before an HTTP request, so changing it alone cannot select a different server response.
Wildness 3/5 · Partly tamedAn HTTP Header Can Carry a Typed Value
Structured Fields give some HTTP headers a shared way to carry numbers, strings, booleans, and collections. The field definition tells clients how to read them.
Wildness 2/5 · Mostly tamedTrace Baggage Can Travel to a Third Party
OpenTelemetry baggage can leave an AI service in outbound HTTP headers. Check what a model API receives and limit propagation at that boundary.
Wildness 3/5 · Partly tamedReading a 429: rate-limit headers for agents
A 429 can tell an agent when to retry and which limit it reached. The response body also matters: some 429s will not clear with backoff.
Wildness 3/5 · Partly tamedHTTP Errors Can Have a Standard Shape
RFC 9457 gives HTTP API errors a standard JSON shape. Learn which fields clients can rely on and how to define useful problem types.
Wildness 1/5 · TamedAsk Before Sending the Gigabyte
A large HTTP upload can be rejected from its headers before its body is sent. Here is how Expect: 100-continue works and where its limits lie.
Wildness 3/5 · Partly tamed
