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express-server/node_modules/packet-reader/.npmignore

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+node_modules

express-server/node_modules/packet-reader/README.md

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+node-packet-reader
+==================
+
+Handy little well tested module for reading length-prefixed binary packets.
+
+Since buffers come off a socket in randomly sized chunks you can't expect them to cleanly
+break on packet boundaries.  This module allows you to push buffers in and read
+full packets out the other side, so you can get to parsing right away and not have
+to manage concatenating partial buffers and searching through them for packets.
+
+## install
+
+` $ npm install packet-reader `
+
+## example
+
+```js
+var Reader = require('packet-reader')
+
+var reader = new Reader()
+//assuming you have a socket emitting `data` events
+socket.on('data', function(buffer) {
+  reader.addChunk(buffer)
+  var packet = reader.read()
+  while(packet) {
+    //do something with fully parsed packet
+  }
+})
+```
+
+
+here's a more full featured example:
+
+let's assume our "packet" for our protocol is 32-bit Big Endian length-prefixed strings
+so a "hello world" packet would look something like [length, string]
+`[0, 0, 0 0x0B, h, e, l, l, o, w, o, r, l, d]`
+
+```js
+var Transform = require('stream').Transform
+var Reader = require('packet-reader')
+var reader = new Reader()
+var parser = new Transform()
+parser._transform = function(chunk, encoding, cb) {
+  reader.addChunk(chunk)
+  var packet = reader.read()
+  while(packet) {
+    this.push(packet.toString('utf8'))
+    packet = reader.read()
+  }
+  cb()
+}
+
+var server = net.createServer(function(socket) {
+  socket.pipe(parser).pipe(stdout)
+})
+
+```
+
+There are a few config options for setting optional pre-length padding byte.  Read the tests for details.
+
+## License
+
+MIT
+
+Copyright 2015 Brian M. Carlson
+All rights reserved.
+
+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.

express-server/node_modules/packet-reader/index.js

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+var assert = require('assert')
+
+var Reader = module.exports = function(options) {
+  //TODO - remove for version 1.0
+  if(typeof options == 'number') {
+    options = { headerSize: options }
+  }
+  options = options || {}
+  this.offset = 0
+  this.lastChunk = false
+  this.chunk = null
+  this.chunkLength = 0
+  this.headerSize = options.headerSize || 0
+  this.lengthPadding = options.lengthPadding || 0
+  this.header = null
+  assert(this.headerSize < 2, 'pre-length header of more than 1 byte length not currently supported')
+}
+
+Reader.prototype.addChunk = function(chunk) {
+  if (!this.chunk || this.offset === this.chunkLength) {
+    this.chunk = chunk
+    this.chunkLength = chunk.length
+    this.offset = 0
+    return
+  }
+
+  var newChunkLength = chunk.length
+  var newLength = this.chunkLength + newChunkLength
+
+  if (newLength > this.chunk.length) {
+    var newBufferLength = this.chunk.length * 2
+    while (newLength >= newBufferLength) {
+      newBufferLength *= 2
+    }
+    var newBuffer = new Buffer(newBufferLength)
+    this.chunk.copy(newBuffer)
+    this.chunk = newBuffer
+  }
+  chunk.copy(this.chunk, this.chunkLength)
+  this.chunkLength = newLength
+}
+
+Reader.prototype.read = function() {
+  if(this.chunkLength < (this.headerSize + 4 + this.offset)) {
+    return false
+  }
+
+  if(this.headerSize) {
+    this.header = this.chunk[this.offset]
+  }
+
+  //read length of next item
+  var length = this.chunk.readUInt32BE(this.offset + this.headerSize) + this.lengthPadding
+
+  //next item spans more chunks than we have
+  var remaining = this.chunkLength - (this.offset + 4 + this.headerSize)
+  if(length > remaining) {
+    return false
+  }
+
+  this.offset += (this.headerSize + 4)
+  var result = this.chunk.slice(this.offset, this.offset + length)
+  this.offset += length
+  return result
+}

express-server/node_modules/packet-reader/package.json

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+{
+  "_from": "packet-reader@0.3.1",
+  "_id": "packet-reader@0.3.1",
+  "_inBundle": false,
+  "_integrity": "sha1-zWLmCvjX/qinBexP+ZCHHEaHHyc=",
+  "_location": "/packet-reader",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "version",
+    "registry": true,
+    "raw": "packet-reader@0.3.1",
+    "name": "packet-reader",
+    "escapedName": "packet-reader",
+    "rawSpec": "0.3.1",
+    "saveSpec": null,
+    "fetchSpec": "0.3.1"
+  },
+  "_requiredBy": [
+    "/pg"
+  ],
+  "_resolved": "https://registry.npmjs.org/packet-reader/-/packet-reader-0.3.1.tgz",
+  "_shasum": "cd62e60af8d7fea8a705ec4ff990871c46871f27",
+  "_spec": "packet-reader@0.3.1",
+  "_where": "D:\\5CHITM\\Diplomarbeit\\smart-shopper\\SmartShopper\\express-server\\node_modules\\pg",
+  "author": {
+    "name": "Brian M. Carlson"
+  },
+  "bugs": {
+    "url": "https://github.com/brianc/node-packet-reader/issues"
+  },
+  "bundleDependencies": false,
+  "deprecated": false,
+  "description": "Read binary packets...",
+  "devDependencies": {
+    "mocha": "~1.16.2"
+  },
+  "directories": {
+    "test": "test"
+  },
+  "homepage": "https://github.com/brianc/node-packet-reader",
+  "license": "MIT",
+  "main": "index.js",
+  "name": "packet-reader",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/brianc/node-packet-reader.git"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "version": "0.3.1"
+}

express-server/node_modules/packet-reader/test/index.js

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+var assert = require('assert')
+var Reader = require('../')
+describe('packet-reader', function() {
+  beforeEach(function() {
+    this.reader = new Reader(1)
+  })
+
+  it('reads perfect 1 length buffer', function() {
+    this.reader.addChunk(new Buffer([0, 0, 0, 0, 1, 1]))
+    var result = this.reader.read()
+    assert.equal(result.length, 1)
+    assert.equal(result[0], 1)
+    assert.strictEqual(false, this.reader.read())
+  })
+
+  it('reads perfect longer buffer', function() {
+    this.reader.addChunk(new Buffer([0, 0, 0, 0, 4, 1, 2, 3, 4]))
+    var result = this.reader.read()
+    assert.equal(result.length, 4)
+    assert.strictEqual(false, this.reader.read())
+  })
+
+  it('reads two parts', function() {
+    this.reader.addChunk(new Buffer([0, 0, 0, 0, 1]))
+    var result = this.reader.read()
+    assert.strictEqual(false, result)
+    this.reader.addChunk(new Buffer([2]))
+    var result = this.reader.read()
+    assert.equal(result.length, 1, 'should return 1 length buffer')
+    assert.equal(result[0], 2)
+    assert.strictEqual(this.reader.read(), false)
+  })
+
+  it('reads multi-part', function() {
+    this.reader.addChunk(new Buffer([0, 0, 0, 0, 16]))
+    assert.equal(false, this.reader.read())
+    this.reader.addChunk(new Buffer([1, 2, 3, 4, 5, 6, 7, 8]))
+    assert.equal(false, this.reader.read())
+    this.reader.addChunk(new Buffer([9, 10, 11, 12, 13, 14, 15, 16]))
+    var result = this.reader.read()
+    assert.equal(result.length, 16)
+  })
+
+  it('resets internal buffer at end of packet', function() {
+    this.reader.addChunk(new Buffer([0, 0, 0, 0, 16]))
+    this.reader.addChunk(new Buffer([1, 2, 3, 4, 5, 6, 7, 8]))
+    this.reader.addChunk(new Buffer([9, 10, 11, 12, 13, 14, 15, 16]))
+    var result = this.reader.read()
+    assert.equal(result.length, 16)
+
+    var newChunk = new Buffer([0, 0, 0, 0, 16])
+    this.reader.addChunk(newChunk)
+    assert.equal(this.reader.offset, 0, 'should have been reset to 0.')
+    assert.strictEqual(this.reader.chunk, newChunk)
+  })
+
+  it('reads multiple messages from single chunk', function() {
+    this.reader.addChunk(new Buffer([0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 2, 1, 2]))
+    var result = this.reader.read()
+    assert.equal(result.length, 1, 'should have 1 length buffer')
+    assert.equal(result[0], 1)
+    var result = this.reader.read()
+    assert.equal(result.length, 2, 'should have 2 length buffer but was ' + result.length)
+    assert.equal(result[0], 1)
+    assert.equal(result[1], 2)
+    assert.strictEqual(false, this.reader.read())
+  })
+
+  it('reads 1 and a split', function() {
+    this.reader.addChunk(new Buffer([0, 0, 0, 0, 1, 1, 0, 0]))//, 0, 0, 2, 1, 2]))
+    var result = this.reader.read()
+    assert.equal(result.length, 1, 'should have 1 length buffer')
+    assert.equal(result[0], 1)
+    var result = this.reader.read()
+    assert.strictEqual(result, false)
+
+    this.reader.addChunk(new Buffer([0, 0, 2, 1, 2]))
+    var result = this.reader.read()
+    assert.equal(result.length, 2, 'should have 2 length buffer but was ' + result.length)
+    assert.equal(result[0], 1)
+    assert.equal(result[1], 2)
+    assert.strictEqual(false, this.reader.read())
+  })
+})
+
+describe('variable length header', function() {
+  beforeEach(function() {
+    this.reader = new Reader()
+  })
+
+  it('reads double message buffers', function() {
+    this.reader.addChunk(new Buffer([
+                                0, 0, 0, 1, 1,
+                                0, 0, 0, 2, 1, 2]))
+    var result = this.reader.read()
+    assert(result)
+    assert.equal(result.length, 1)
+    assert.equal(result[0], 1)
+    result = this.reader.read()
+    assert(result)
+    assert.equal(result.length, 2)
+    assert.equal(result[0], 1)
+    assert.equal(result[1], 2)
+    assert.strictEqual(this.reader.read(), false)
+  })
+})
+
+describe('1 length code', function() {
+  beforeEach(function() {
+    this.reader = new Reader(1)
+  })
+
+  it('reads code', function() {
+    this.reader.addChunk(new Buffer([9, 0, 0, 0, 1, 1]))
+    var result = this.reader.read()
+    assert(result)
+    assert.equal(this.reader.header, 9)
+    assert.equal(result.length, 1)
+    assert.equal(result[0], 1)
+  })
+
+  it('is set on uncompleted read', function() {
+    assert.equal(this.reader.header, null)
+    this.reader.addChunk(new Buffer([2, 0, 0, 0, 1]))
+    assert.strictEqual(this.reader.read(), false)
+    assert.equal(this.reader.header, 2)
+  })
+})
+
+describe('postgres style packet', function() {
+  beforeEach(function() {
+    this.reader = new Reader({
+      headerSize: 1,
+      lengthPadding: -4
+    })
+  })
+
+  it('reads with padded length', function() {
+    this.reader.addChunk(new Buffer([1, 0, 0, 0, 8, 0, 0, 2, 0]))
+    var result = this.reader.read()
+    assert(result)
+    assert.equal(result.length, 4)
+    assert.equal(result[0], 0)
+    assert.equal(result[1], 0)
+    assert.equal(result[2], 2)
+    assert.equal(result[3], 0)
+  })
+})