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frame-stream
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Length-prefixed message framing for Node.js streams.
Some protocols, e.g. TCP, do not not guarantee to keep message boundaries. One common approach to distinguish such messages is Length Prefixing, which prepends each message with its length. frame-stream
accepts a stream with such length-prefixed messages and returns each frame on its own.
Simply pipe an incoming (e.g. TCP) stream into require('frame-stream').decode()
and pipe require('frame-stream').encode()
into an outgoing stream:
var net = require('net')
var frame = require('frame-stream')
var port = 30000
net.createServer(function(socket) {
socket.pipe(frame.decode()).on('data', function(buf) {
console.log(buf.toString())
})
}).listen(port, function() {
net.connect(port, function() {
var encode = frame.encode()
encode.pipe(this)
encode.write('hello world')
encode.end('cheerio!')
})
})
var frame = require('frame-stream')
This is an alias for new frame.Decoder(opts)
. The following options are available:
readInt8()
, readInt16BE()
or readInt32BE()
according to the lengthSize
.0
= turned off).false
) - Return parts of a message as they arrive, rather than buffering them up until the last part arrives. Useful when you know messages will be large. Each part will be a Buffer
with the following extra properties:
This is an alias for new frame.Encoder(opts)
. It prepends each chunk/message with its length. The following options are available:
writeInt8()
, writeInt16BE()
or writeInt32BE()
according to the lengthSize
.Copyright (c) 2014-2015 Markus Ast
Copyright (c) 2020 David Halls
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
Length-prefixed message framing for Node.js streams.
The npm package frame-stream receives a total of 2,974 weekly downloads. As such, frame-stream popularity was classified as popular.
We found that frame-stream demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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