`events.once` is a great way to manage the `close` / `error` / `exit`
events of a child process. It creates a Promise that is fulfilled when
the EventEmitter emits the given event or that is rejected if the
EventEmitter emits 'error' while waiting.
I think a lot of people wrongly think that managing a spawned child
process requires writing boilerplate handlers for `close` and `error`,
and that there's no `promisify` solution for spawned child processes. In
fact, `events.once` is that solution. The docs should explicitly
recommend it in examples.
PR-URL: https://github.com/nodejs/node/pull/60017
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Node.js only checks trust settings of additional certificates
from the system store.
It does not, however, support revocation/distrust of existing
certificates.
PR-URL: https://github.com/nodejs/node/pull/60340
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
- Make sure that the vm.Module.evaluate() method is conditionally
synchronous based on the specification. Previously, the returned
promise is unconditionally pending (even for synthetic modules and
source text modules without top-level await) instead of immediately
fulfilled, making it harder to debug as it deviates from the
specified behavior.
- Clarify the synchronicity of this method in the documentation
- Add more tests for the synchronicity of this method.
PR-URL: https://github.com/nodejs/node/pull/60205
Refs: https://github.com/nodejs/node/issues/59656
Refs: https://github.com/nodejs/node/issues/37648
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
This patch implements proxy support for HTTP and HTTPS clients and
agents in the `http` and `https` built-ins`. When NODE_USE_ENV_PROXY
is set to 1, the default global agent would parse the
HTTP_PROXY/http_proxy, HTTPS_PROXY/https_proxy, NO_PROXY/no_proxy
settings from the environment variables, and proxy the requests
sent through the built-in http/https client accordingly.
To support this, `http.Agent` and `https.Agent` now accept a few new
options:
- `proxyEnv`: when it's an object, the agent would read and parse
the HTTP_PROXY/http_proxy, HTTPS_PROXY/https_proxy, NO_PROXY/no_proxy
properties from it, and apply them based on the protocol it uses
to send requests. This option allows custom agents to
reuse built-in proxy support by composing options. Global agents
set this to `process.env` when NODE_USE_ENV_PROXY is 1.
- `defaultPort` and `protocol`: these allow setting of the default port
and protocol of the agents. We also need these when configuring
proxy settings and deciding whether a request should be proxied.
Implementation-wise, this adds a `ProxyConfig` internal class to handle
parsing and application of proxy configurations. The configuration
is parsed during agent construction. When requests are made,
the `createConnection()` methods on the agents would check whether
the request should be proxied. If yes, they either connect to the
proxy server (in the case of HTTP reqeusts) or establish a tunnel
(in the case of HTTPS requests) through either a TCP socket (if the
proxy uses HTTP) or a TLS socket (if the proxy uses HTTPS).
When proxying HTTPS requests through a tunnel, the connection listener
is invoked after the tunnel is established. Tunnel establishment uses
the timeout of the request options, if there is one. Otherwise it uses
the timeout of the agent.
If an error is encountered during tunnel establishment, an
ERR_PROXY_TUNNEL would be emitted on the returned socket. If the proxy
server sends a errored status code, the error would contain an
`statusCode` property. If the error is caused by timeout, the error
would contain a `proxyTunnelTimeout` property.
This implementation honors the built-in socket pool and socket limits.
Pooled sockets are still keyed by request endpoints, they are just
connected to the proxy server instead, and the persistence of the
connection can be maintained as long as the proxy server respects
connection/proxy-connection or persist by default (HTTP/1.1)
PR-URL: https://github.com/nodejs/node/pull/58980
Refs: https://github.com/nodejs/node/issues/57872
Refs: https://github.com/nodejs/node/issues/8381
Refs: https://github.com/nodejs/node/issues/15620
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
When enabled, Node.js parses the `HTTP_PROXY`, `HTTPS_PROXY` and
`NO_PROXY` environment variables during startup, and tunnels requests
over the specified proxy.
This currently only affects requests sent over `fetch()`. Support for
other built-in `http` and `https` methods is under way.
PR-URL: https://github.com/nodejs/node/pull/57165
Refs: https://github.com/nodejs/undici/issues/1650
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
This commit adds support for specifying --max-old-space-size as a
percentage of system memory, in addition to the existing MB format.
A new HandleMaxOldSpaceSizePercentage method parses percentage values,
validates that they are within the 0-100% range, and provides clear
error messages for invalid input. The heap size is now calculated
based on available system memory when a percentage is used.
Test coverage has been added for both valid and invalid cases.
Documentation and the JSON schema for CLI options have been updated
with examples for both formats.
Refs: https://github.com/nodejs/node/issues/57447
PR-URL: https://github.com/nodejs/node/pull/59082
Backport-PR-URL: https://github.com/nodejs/node/pull/59631
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: theanarkh <theratliter@gmail.com>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Split `module.link(linker)` into two synchronous step
`sourceTextModule.linkRequests()` and
`sourceTextModule.instantiate()`. This allows creating vm modules and
resolving the dependencies in a complete synchronous procedure.
This also makes `syntheticModule.link()` redundant. The link step for a
SyntheticModule is no-op and is already taken care in the constructor
by initializing the binding slots with the given export names.
PR-URL: https://github.com/nodejs/node/pull/59000
Backport-PR-URL: https://github.com/nodejs/node/pull/60152
Refs: https://github.com/nodejs/node/issues/37648
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
This note on `options.stdio` mentions that it's not recommended to pass
`stdin` as a writable stream and `stdout/stderr` as readable, but then
proceeds to say to always check that `stdin` is writable and
`stdout/stderr` are readable.
Going by the examples and the fact that `process.stdin` is readable and
`process.stdout/process.stderr` are writable, I'm assuming that the
types in the recommendation got swapped.
PR-URL: https://github.com/nodejs/node/pull/60114
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Akhil Marsonya <akhil.marsonya27@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
René