When a readable listener is added, call read(0) so that data will flow in, up to
the high water mark.
Otherwise, it's somewhat confusing that you have to listen for readable,
and ALSO call read() (when it will certainly return null) just to get some
data out of the stream.
See: #4720
A typo in the variable name makes it throw a ReferenceError instead of
the expected "Unknown type" error when dns.resolve() is passed a bad
record type argument.
Fixes the following exception:
ReferenceError: type is not defined
at Object.exports.resolve (dns.js:189:40)
at /Users/bnoordhuis/src/master/test/simple/test-c-ares.js:48:9
<snip>
Calling end(data) calls write(data). Doing this after end should
raise a 'write after end' error.
However, because end() calls were previously ignored on already
ended streams, this error was confusingly suppressed, even though the
data never is written, and cannot get to the other side.
This is a re-hash of 5222d19a11, but
without assuming that the data passed to end() is valid, and thus
breaking a bunch of tests.
The try/catch in repl.js keeps any active domain from catching the
error. Since the domain may not even be enterd until the code is run,
it's not possible to avoid the try/catch, so emit on the domain when an
error is thrown.
Calling end(data) calls write(data). Doing this after end should
raise a 'write after end' error.
However, because end() calls were previously ignored on already
ended streams, this error was confusingly suppressed, even though the
data never is written, and cannot get to the other side.
The stock writable stream "write after end" message is overly vague, if
you have clearly not called end() yourself yet.
When we receive a FIN from the other side, and call destroySoon() as a
result, then generate an EPIPE error (which is what would happen if you
did actually write to the socket), with a message explaining what
actually happened.
By making sure the _events is always an object there is one less check
that needs to be performed by emit.
Use undefined instead of null. typeof checks are a lot faster than
isArray.
There are a few places where the this._events check cannot be removed
because it is possible for the user to call those methods after using
utils.extend to create their own EventEmitter, but before it has
actually been instantiated.
Unnecessary checks were being performed on if the event existed before
being removed.
_events starts out as null, so reset to null when emptied.
Checking typeof is a lot cheaper than isArray().
Ability to return just the length of listeners for a given type, using
EventEmitter.listenerCount(emitter, event). This will be a lot cheaper
than creating a copy of the listeners array just to check its length.
We were using a global temp file while setting the NODE_VERSION
environment variable. This resulted in simultaneous builds swapping
version numbers on occasion.
This patch removes the use of a temp file for this.
Register the 'close' event listener with .once(), not .on().
It doesn't matter in the grand scheme of things because the listener
doesn't keep references to any heavy-weight objects but using .once()
for a oneshot listener is something of a best practice.
The first example uses Readable, and shows the use of
readable.unshift(). The second uses the Transform class, showing that
it's much simpler in this case.
This makes it so that `stream.push(chunk)` is the only way to signal the
end of reading, removing the confusing disparity between the
callback-style _read method, and the fact that most real-world streams
do not have a 1:1 corollation between the "please give me data" event,
and the actual arrival of a chunk of data.
It is still possible, of course, to implement a `CallbackReadable` on
top of this. Simply provide a method like this as the callback:
function readCallback(er, chunk) {
if (er)
stream.emit('error', er);
else
stream.push(chunk);
}
However, *only* fs streams actually would behave in this way, so it
makes not a lot of sense to make TCP, TLS, HTTP, and all the rest have
to bend into this uncomfortable paradigm.
A primary motivation of this is to make the onread function more
inline-friendly, but also to make it more easy to explore not having
onread at all, in favor of always using push() to signal the end of
reading.
isaacs
Xidorn Quan
Rod Vagg
Aaron Cannon
Dave Olszewski
Ben Noordhuis
Raymond Feng
Timothy J Fontaine
Trevor Norris
Lars-Magnus Skog
Gil Pedersen
Evan Oxfeld
Scott Blomquist