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proxy-packer.js
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add connection event and packHeader function

This commit is contained in:
AJ ONeal 2018-08-07 01:26:59 -06:00
parent 178bd67375
commit 2e4e73e48b
1 changed files with 42 additions and 26 deletions
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68
index.js
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@ -4,6 +4,7 @@ var Packer = module.exports;
var serviceEvents = {
default: 'tunnelData'
, connection: 'tunnelConnection'
, control: 'tunnelControl'
, error: 'tunnelError'
, end: 'tunnelEnd'
@ -12,6 +13,7 @@ var serviceEvents = {
};
var serviceFuncs = {
default: 'onmessage'
, connection: 'onconnection'
, control: 'oncontrol'
, error: 'onerror'
, end: 'onend'
@ -28,12 +30,13 @@ Packer.create = function (opts) {
machine = {};
}
machine.onmessage = opts.onmessage || opts.onMessage;
machine.oncontrol = opts.oncontrol || opts.onControl;
machine.onerror = opts.onerror || opts.onError;
machine.onend = opts.onend || opts.onEnd;
machine.onpause = opts.onpause || opts.onPause;
machine.onresume = opts.onresume || opts.onResume;
machine.onmessage = opts.onmessage || opts.onMessage;
machine.oncontrol = opts.oncontrol || opts.onControl;
machine.onconnection = opts.onconnection || opts.onConnection || function () {};
machine.onerror = opts.onerror || opts.onError;
machine.onend = opts.onend || opts.onEnd;
machine.onpause = opts.onpause || opts.onPause;
machine.onresume = opts.onresume || opts.onResume;
machine._version = 1;
machine.fns = {};
@ -43,8 +46,9 @@ Packer.create = function (opts) {
machine.bufIndex = 0;
machine.fns.collectData = function (chunk, size) {
var chunkLeft = chunk.length - machine.chunkIndex;
var hasLen = (size > 0);
if (size <= 0) {
if (!hasLen) {
return Buffer.alloc(0);
}
@ -115,13 +119,13 @@ Packer.create = function (opts) {
machine._headers = header.toString().split(/,/g);
machine.family = machine._headers[0];
machine.address = machine._headers[1];
machine.port = machine._headers[2];
machine.bodyLen = parseInt(machine._headers[3], 10) || 0;
machine.service = machine._headers[4];
machine.family = machine._headers[0];
machine.address = machine._headers[1];
machine.port = machine._headers[2];
machine.bodyLen = parseInt(machine._headers[3], 10) || 0;
machine.service = machine._headers[4];
machine.serviceport = machine._headers[5];
machine.name = machine._headers[6];
machine.name = machine._headers[6];
//console.log('machine.service', machine.service);
return true;
@ -130,13 +134,18 @@ Packer.create = function (opts) {
machine.fns.data = function (chunk) {
//console.log('');
//console.log('[data]');
var data = machine.fns.collectData(chunk, machine.bodyLen);
// We don't have the entire body yet so return false.
if (!data) {
return false;
var data;
// The 'connection' event may not have a body
// Other events may not have a body either
if (machine.bodyLen) {
data = machine.fns.collectData(chunk, machine.bodyLen);
// We don't have the entire body yet so return false.
if (!data) {
return false;
}
}
//
// data, end, error
//
@ -186,12 +195,14 @@ Packer.create = function (opts) {
return machine;
};
Packer.pack = function (meta, data, service) {
data = data || Buffer.from(' ');
if (!Buffer.isBuffer(data)) {
Packer.packHeader = function (meta, data, service, andBody, oldways) {
if (oldways) {
data = data || Buffer.from(' ');
}
if (data && !Buffer.isBuffer(data)) {
data = new Buffer(JSON.stringify(data));
}
if (!data.byteLength) {
if (oldways && !data.byteLength) {
data = Buffer.from(' ');
}
@ -199,26 +210,31 @@ Packer.pack = function (meta, data, service) {
meta.service = service;
}
var size = data && data.byteLength || 0;
var sizeReserve = andBody ? size : 0;
var version = 1;
var header;
if (service === 'control') {
header = Buffer.from(['', '', '', data.byteLength, service].join(','));
header = Buffer.from(['', '', '', size, service].join(','));
}
else {
header = Buffer.from([
meta.family, meta.address, meta.port, data.byteLength,
meta.family, meta.address, meta.port, size,
(meta.service || ''), (meta.serviceport || ''), (meta.name || '')
].join(','));
}
var metaBuf = Buffer.from([ 255 - version, header.length ]);
var buf = Buffer.alloc(metaBuf.byteLength + header.byteLength + data.byteLength);
var buf = Buffer.alloc(metaBuf.byteLength + header.byteLength + sizeReserve);
metaBuf.copy(buf, 0);
header.copy(buf, 2);
data.copy(buf, 2 + header.byteLength);
if (sizeReserve) { data.copy(buf, 2 + header.byteLength); }
return buf;
};
Packer.pack = function (meta, data, service) {
return Packer.packHeader(meta, data, service, true, true);
};
function extractSocketProps(socket, propNames) {
var props = {};