A redirect fetch followed or rejected was marked to drain: its body was
read and dropped until the server ended it, and the abort listener was
already removed. A body that never ends kept the connection busy after
cancellation and stalled a pool of one connection. Following or
rejecting a redirect now aborts its request, so the connection closes.
undici 7 leaves that connection open with its body paused, which stalls
the same pool; the follow-up request here gets a new connection.
copy and copySync now follow fs-extra's onLink: only a destination that
is itself a symlink is replaced; over a regular file or directory the
symlink call fails with EEXIST and the destination is kept, whatever
overwrite says. The fs-extra corpus program covers both forms.
The implicit constructor forwarded its arguments to EventEmitter's options-taking constructor, which compiles to a deferred runtime fence. Dispatcher takes no options, so it calls super() directly.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- writeFile and outputFile with byte data and a mode open the file with
that mode, and writeJsonSync and outputJsonSync pass the mode.
- copySync and moveSync compare source and destination inodes and walk
the destination's parents, as copy and move do.
- The resolver parity sweep skips the project-import comparison for
shimmed packages.
- The JSON reader writes the byte order mark as an escape.
- A builtin alias whose replacement starts with a global the file
declares (`process`, `Array`) keeps the package's own module: the
replacement would read the local binding.
- A polyfill package the project marks unloaded has no builtin alias, so
its require throws MODULE_NOT_FOUND.
- The undici shim rejects a Host header value with characters outside
the header value set (CR, LF and other controls) with `invalid <key>
header`, as undici 5.19.1 and later and 7.x do, before the client
writes it into the request head.
- Format lowerer.ts and type-mapper.ts.
build-utils declares its error module's bindings and initializer in one
statement (`var NowBuildError, mapTypoToSuggestion, init_errors = __esm(…)`).
The split pieces follow the statement, so the initializer only needs to be
its last declarator.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Date-only utimes, literal mkdir recursion and promise-backed readFile
callbacks: the forms that compile natively with either type world.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
fs-extra builds its exports at load time (computed keys over graceful-fs,
universalify wrappers), which the static CommonJS model cannot follow, so
programs reading its members through the default import failed. The
package-shim registry now maps fs-extra 8.x-11.x to a TypeScript
implementation over node:fs: fs's members re-exported, the wrapped methods
following universalify's callback-or-promise rule over fs.promises, and
the extras (copy, move, remove, emptyDir, mkdirs, ensureFile, pathExists,
outputFile, the JSON helpers and their aliases) with fs-extra's messages.
Its declarations stand in for @types/fs-extra, including the default
import, and a namespace import resolves to the shim. What it does not
implement is not declared, so using it is a type error.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The undici5 and undici7 npm cases now also run peers.ts against Node with
the vendored undici: header values with CR or LF, chunk-size lines that
are valid, malformed, overflowing or 1 MiB long, and fetch bodies that
are endless (read once, then cancelled), gzipped, truncated, empty,
corrupt, cut off, aborted after the headers, redirected while endless,
or carry six content codings. The undici5 case leaves out the Host
values, which undici 5.12 writes into the request head, and the two
fetch cases where undici 5.12 differs (six codings, and an endless
redirect, which fails with a TypeError in 5.12).
package-shims.test.ts compiles two programs in copies of the cases: one
reads 64 MiB chunk-size lines and 64 MiB plain and gzipped fetch bodies
from a separate Node peer and checks that RSS stays under 48 MiB (plain
lane), the other checks that the 5.x profile rejects a Host value with
CR or LF with undici 5.29.0's error.
A TypeScript implementation over node:net, node:tls and node:events:
Dispatcher, Client (HTTP/1.1 with keep-alive), Pool, Agent,
buildConnector, request(), errors, the global dispatcher, fetch, Headers
and the diagnostics_channel publications, with per-version behavior.
Differential npm cases run the vendored real undici under Node.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Chris Tate