Buffer.from of strings, arrays and Uint8Arrays, Buffer.allocUnsafe and
Buffer.concat now return views into a per-thread pool slab of
Buffer.poolSize bytes (64 KiB by default) when the size is below
Buffer.poolSize >>> 1, following Node's allocate, fromStringFast and
fromArrayLike: 8-byte aligned offsets, a new slab when a request does not
fit, and the four-bytes-per-unit reservation for strings. Buffer.poolSize
can be read and set, and Buffer.allocUnsafeSlow returns an unpooled Buffer.
A slab lives while any of its views does. Its ArrayBuffer cannot be
transferred, and structuredClone of a typed array view copies the whole
ArrayBuffer and keeps the view's offset. Buffer.alloc, allocUnsafe and
allocUnsafeSlow validate sizes with Node's ERR_OUT_OF_RANGE error.
The first pooled allocation finds the startup slab, which has the
default 64 KiB size. A request it cannot hold gets a slab of the current
Buffer.poolSize, as in Node, and the room is checked after every new
slab, so a Buffer.poolSize raised before the first pooled allocation
cannot place a reservation past the end of a 64 KiB slab. A reservation
larger than a fresh slab traps instead of writing past it.
Corpus 5531 (typed) and 5532 (untyped) raise Buffer.poolSize before the
first pooled allocation and allocate just under the new threshold
through each pooled path, each case in a fresh child process, and also
shrink Buffer.poolSize and change it between allocations. The
node-types fenced fixture no longer lists Buffer.poolSize, which now
compiles.
- server.close() closes idle keep-alive connections, and every open
connection closes after keepAliveTimeout + keepAliveTimeoutBuffer, so a
closed server whose clients keep their connections no longer stays up.
The Keep-Alive response header gives keepAliveTimeout in whole seconds
and is omitted when it is 0.
- A client request through an Agent with neither keepAlive nor a finite
maxSockets sends Connection: close.
- "socket hang up" and "aborted" errors carry code ECONNRESET, a client
head over the header limit fails with HPE_HEADER_OVERFLOW, and TLS
verification failures carry their openssl code.
- Outgoing header values keep the type they were set with: getHeader and
getHeaders answer numbers and arrays, appendHeader turns an existing
value into an array, and setHeader(name, string[]) writes one line per
element.
- Repeated incoming header fields join with ", " ("; " for cookie),
Node's single-value fields keep the first value, and set-cookie reads
as an array under @types/node, on server requests and client responses.
Fetch reads response headers line by line.
- Expect: 100-continue is answered with 100 Continue before 'request';
other expectations answer 417.
- HEAD requests and 1xx/204/304 responses send no body or length header,
and HTTP/1.0 requests without a set length get an unframed body and
Connection: close.
- The 16 KiB maxHeaderSize applies to the request target plus header
names and values (431 on the server).
- https.Agent TLS options are refused by name instead of being dropped,
and server.address() lowers for @types/node's
string | AddressInfo | null result.
Corpus 5555-5563 and the node-types http-headers-address fixture cover
each case.
docs/content/docs/limitations.mdx now holds the frontmatter, the
headings, the anchor spans and one <include> line per partial. The text
moves unchanged to docs/content/limitations/: one file per labeled
bullet (<section>/<label>.mdx) and one per section's other text
(<section>.mdx). Edits to different bullets no longer touch adjacent
lines of one file.
remarkDocsConventions splices the included partials into the page and
joins the lists that consecutive bullet partials contribute, so the page,
its Markdown twin and the search index render as before. The route tests
read the page with its partials inlined. A page that includes partials
takes its last-modified date, used by the sitemap, from the newest commit
to the page or any of its partials.
docs/scripts/limitations-partials.mjs joins the partials back into one
file, splits a single-file page, and merges a branch's edits to the
single-file page into the partials.
Chris Tate