Make explicitArray=false the default

Upgrade lodash to fix vunerability

.gitignore

@@ -35,3 +35,6 @@ jspm_packages
 
 # Optional REPL history
 .node_repl_history
+/dist
+/docs
+drorgl-xml-streamer-*.tgz

.npmignore

@@ -1,3 +1,13 @@
 # Dependency directories
 test
-.travis.yml
+.travis.yml
+tsconfig.json
+tslint.json
+.nyc_output
+.vscode
+coverage
+docs
+src
+drorgl-xml-streamer*
+.nycrc
+examples

.nycrc

@@ -0,0 +1,20 @@
+{
+  "extension": [
+      ".ts"
+  ],
+  "require": [
+      "ts-node/register"
+  ],
+  "include": [
+      "src/**/*.ts"
+  ],
+  "exclude": [
+      "**/*.d.ts"
+  ],
+  "reporter": [
+      "html",
+      "text-summary",
+      "text"
+  ],
+  "all": true
+}

.vscode/launch.json

@@ -0,0 +1,51 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "program": "${workspaceFolder}\\node_stream_zip.js",
+            "preLaunchTask": "tsc: build - tsconfig.json",
+            "outFiles": [
+                "${workspaceFolder}/dist/**/*.js"
+            ]
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Mocha All",
+            "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
+            "args": [
+                "--timeout",
+                "999999",
+                "--colors",
+                "-r",
+                "ts-node/register",
+                "test/**/*.spec.ts"
+            ],
+            "console": "integratedTerminal",
+            "internalConsoleOptions": "neverOpen"
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Mocha Current File",
+            "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
+            "args": [
+                "--timeout",
+                "999999",
+                "--colors",
+                "-r",
+                "ts-node/register",
+                "${file}"
+            ],
+            "console": "integratedTerminal",
+            "internalConsoleOptions": "neverOpen"
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,15 @@
+{
+    "cSpell.words": [
+        "Dror",
+        "Gluska",
+        "Teja",
+        "apos",
+        "drorgl",
+        "dryrun",
+        "gmail",
+        "prefinish",
+        "saitejas",
+        "typedoc",
+        "xmltojs"
+    ]
+}

README.md

@@ -1,129 +1,162 @@
 # xml-streamer
 
-[![Build Status](https://travis-ci.org/Sai1919/xml-streamer.svg?branch=master)](https://travis-ci.org/Sai1919/xml-streamer)
-## Motivation
+## IMPORTANT
 
-You use [Node.js](https://nodejs.org) for speed? You process XML streams? Then you want the fastest XML to JS parser: `xml-streamer`, based on [node-expat](https://github.com/astro/node-expat) and It implements the Node.js `stream.Transform API`.
+This is a modified version of xml-streamer, the parser + tests stayed mostly the same but the core xml parser was replaced with [SaxLtx xml parser](https://github.com/xmppjs/ltx) due to reliability/stability issues with node-expat, both this library and ltx were converted to typescript.
+Please note that ltx parser is about 20% slower than node-expat.
 
 ## Install
 
 ```
-npm install xml-streamer
+npm install @drorgl/xml-streamer
 ```
 
 ## Basic Usage
 
 `xml-streamer can be used in four ways`
 
-```javascript
+```typescript
 // 1. By passing the resourcePath and reading data by calling `read` method instead listening for data events.
 
-(function () {
-  "use strict";
+import {XmlParser} from "@drorgl/xml-streamer";
 
-  var Parser = require('xml-streamer')
-  
-  var opts = {resourcePath: '/items/item'}
+const opts = { resourcePath: "/items/item" };
 
-  var parser = new Parser(opts)
-  
-  parser.on('end', function () {
-    // parsing ended no more data events will be raised
-  })
+const parser = new XmlParser(opts);
 
-  parser.on('error', function (error) {
-    // error occurred
-    // NOTE: when error event emitted no end event will be emitted
-    console.error(error)
-  })
+parser.on("end", () => {
+	// parsing ended no more data events will be raised
+});
+
+parser.on("error", (error) => {
+	// error occurred
+	// NOTE: when error event emitted no end event will be emitted
+	console.error(error);
+});
+
+xmlStream.pipe(parser); // pipe your input xmlStream to parser.
+// readable
+parser.on("readable", () => {
+  // if you don't want to consume "data" on "data" events you can wait 
+  // for readable event and consume data by calling parser.read()
+});
+// after readable event occured you can call read method and get data.
+parser.read(); // will return one object at a time.
 
-  xmlStream.pipe(parser) // pipe your input xmlStream to parser.
-  // readable
-  parser.on('readable', function () {
-     // if you don't want to consume "data" on "data" events you can wait for readable event and consume data by calling parser.read() 
-  })
-  // after readable event occured you can call read method and get data.
-  parser.read() // will return one object at a time.
-}())
 
 // 2. By listening for interested nodes.
 
-(function () {
-  "use strict";
+import { XmlParser } from "@drorgl/xml-streamer";
 
-  var Parser = require('xml-streamer')
-  
-  var opts = {} // see `Available Constructor Options` section below.
+const opts = {}; // see `Available Constructor Options` section below.
 
-  var parser = new Parser(opts)
-  
-  parser.on('item', function (item) {
-    // consume the item object here
-  })
-  
-  parser.on('end', function () {
-    // parsing ended no more data events will be raised
-  })
+const parser = new XmlParser(opts);
 
-  parser.on('error', function (error) {
-    // error occurred
-    // NOTE: when error event emitted no end event will be emitted
-    console.error(error)
-  })
+parser.on("item", (item) => {
+	// consume the item object here
+});
+
+parser.on("end", () => {
+	// parsing ended no more data events will be raised
+});
+
+parser.on("error", (error) => {
+	// error occurred
+	// NOTE: when error event emitted no end event will be emitted
+	console.error(error);
+});
+
+xmlStream.pipe(parser); // pipe your input xmlStream to parser.
+// readable
+parser.on("readable", () => {
+  // if you don't want to consume "data" on "data" events you can wait 
+  //for readable event and consume data by calling parser.read()
+});
 
-  xmlStream.pipe(parser) // pipe your input xmlStream to parser.
-  // readable
-  parser.on('readable', function () {
-      // if you don't want to consume "data" on "data" events you can wait for readable event and consume data by calling parser.read() 
-  })
-}())
 
 // 3. By passing a resource path.
 
-(function () {
-  "use strict";
+import { XmlParser } from "@drorgl/xml-streamer";
 
-  var Parser = require('xml-streamer')
-  var opts = {resourcePath: '/items/item'}
-  
-  var parser = new Parser(opts)
-  
-  parser.on('data', function (data) {
-    // consume the data object here
-  })
-  
-  parser.on('end', function () {
-    // parsing ended no more data events will be raised
-  })
+const opts = { resourcePath: "/items/item" };
 
-  parser.on('error', function (error) {
-    // error occurred
-    // NOTE: when error event emitted no end event will be emitted
-    console.error(error)
-  })
+const parser = new XmlParser(opts);
+
+parser.on("data", (data) => {
+	// consume the data object here
+});
+
+parser.on("end", () => {
+	// parsing ended no more data events will be raised
+});
+
+parser.on("error", (error) => {
+	// error occurred
+	// NOTE: when error event emitted no end event will be emitted
+	console.error(error);
+});
+
+xmlStream.pipe(parser); // pipe your input xmlStream to parser.
+// readable
+parser.on("readable", () => {
+	// if you don't want to consume "data" on "data" events you
+	// can wait for readable event and consume data by calling parser.read()
+});
 
-  xmlStream.pipe(parser) // pipe your input xmlStream to parser.
-  // readable
-  parser.on('readable', function () {
-      // if you don't want to consume "data" on "data" events you can wait for readable event and consume data by calling parser.read() 
-  })
-}())
 
 // 4. By passing a string or buffer to parse function
 
-(function () {
-  "use strict";
+import { XmlParser } from "@drorgl/xml-streamer";
 
-  var Parser = require('xml-streamer')
-  
-  var opts = {resourcePath: '/items/item'} // resourcePath is manditory when using parse method
+const opts = { resourcePath: "/items/item" }; // resourcePath is manditory when using parse method
 
-  var parser = new Parser(opts)
-  
-  parser.parse(stringOrBuffer, function (err, data) {
-    // consume data here
-  })
-}())
+const parser = new XmlParser(opts);
+
+parser.parse(stringOrBuffer, (err, data) => {
+	// consume data here
+});
+
+// 5. Compressed Stream Parsing
+
+import { XmlParser } from "@drorgl/xml-streamer";
+import { StreamZip } from "node-stream-zip";
+
+const zip = new StreamZip({
+    file: archiveName,
+    storeEntries: true
+});
+
+
+const opts = {}; // see `Available Constructor Options` section below.
+
+const parser = new XmlParser(opts);
+
+parser.on("item", (item) => {
+	// consume the item object here
+});
+
+parser.on("end", () => {
+	// parsing ended no more data events will be raised
+});
+
+parser.on("error", (error) => {
+	// error occurred
+	// NOTE: when error event emitted no end event will be emitted
+	console.error(error);
+});
+
+xmlStream.pipe(parser); // pipe your input xmlStream to parser.
+// readable
+parser.on("readable", () => {
+	// if you don't want to consume "data" on "data" events you can wait for readable event and consume data by calling parser.read()
+});
+
+zip.on("ready", () => {
+    zip.stream('path/inside/zip.xml', (err, stm) => {
+        stm.pipe(parser);
+        stm.on('end', () => zip.close());
+    });
+});
 
 ```
 
@@ -137,6 +170,7 @@ npm install xml-streamer
 * `#resume()` resumes
 * `#read()` returns object if stream is readable
 
+
 ## Available Constructor Options
 
 * `resourcePath`: `Type: String` Optional field. Used to extract the XML nodes that you are interested in. 
@@ -161,6 +195,7 @@ npm install xml-streamer
            if you are interested in `items` nodes then resourcePath would be: `/items`
 
 
+
 * `emitOnNodeName`: `Type: Boolean` Optional field. Set this to true if you want to listen on node names instead of data event. `default: false`
             
             // Ex: consider the above XML snippet
@@ -181,6 +216,7 @@ npm install xml-streamer
                 `NOTE:` when you set `emitOnNodeName:true` "data" events are emitted normally. So make sure you don't listen for both the events.
 
 
+
 * `attrsKey`: `Type: String` Optional field. pass the value with which you want to reference attributes of a node in its object form. `default: '$'`
                   
 * `textKey`: `Type: String` Optional field. pass the value with which you want to reference node value in its object form. `default: '_'`
@@ -203,6 +239,7 @@ npm install xml-streamer
                   ```
                      // Then set `attrsKey= "attrs"` and `textKey= "text"`
 
+
 * `explicitArray`: `Type: Boolean` Optional field. `Default value is true`. All children nodes will come in an array when this option is true.
 
             // Ex: For example let the XML be
@@ -224,10 +261,33 @@ npm install xml-streamer
                 ```
         `caution:` When explicitArray set to false and if there are multiple children nodes with same name then last node will override all preceding nodes. 
 
-## upcoming features
+* `verbatimText`: `Type: Boolean` Optional field. `Default value is false`. When set, text attribute will include all blanks found in xml. When unset, blanks are removed as long as they come in one expat single block (blank lines, newlines and entities).
 
-1. `handling of compressed streams`
-2. `handling of different encodings`
+            // Ex: For example let the XML be
+                ```xml
+                    <?xml version="1.0" encoding="utf-8"?>
+                    <items>
+                        <item>
+                This is
+                a test
+                        </item>
+                    </items>
+                ```
+            // if verbatimText is true and resourcePath is /items/item.
+            // Output for above xml will be
+                ```javascript
+                        [
+                           { '_' : "\nThis is\na test\n            "}
+                        ]
+                ```
+
+            // if verbatimText is false and resourcePath is /items/item.
+            // Output for above xml will be
+                ```javascript
+                        [
+                           { '_' : "This isa test"}
+                        ]
+                ```
 
 
 ## Namespace handling
@@ -235,24 +295,25 @@ npm install xml-streamer
 A word about special parsing of *xmlns:* Note that "resourcePath" in the options is not an XPATH.
 So the value given to the resourcePath is treated as simple value and no expression evaluations are done.
 
-## Benchmark
-
-`xml-streamer` internally uses `node-expat`
-
-`npm run benchmark`
-
-| module                                                                                | ops/sec | native | XML compliant | stream         |
-|---------------------------------------------------------------------------------------|--------:|:------:|:-------------:|:--------------:|
-| [sax-js](https://github.com/isaacs/sax-js)                                            |  99,412 | ☐      | ☑             | ☑              |
-| [node-xml](https://github.com/dylang/node-xml)                                        | 130,631 | ☐      | ☑             | ☑              |
-| [libxmljs](https://github.com/polotek/libxmljs)                                       | 276,136 | ☑      | ☑             | ☐              |
-| **node-expat**                                                                        | 322,769 | ☑      | ☑             | ☑              |
-
-Higher is better.
-
 ## Testing
 
 ```
-npm install -g standard
 npm test
+```
+
+## Coverage
+```
+npm coverage
+
+=============================== Coverage summary ===============================
+Statements   : 90.91% ( 340/374 )
+Branches     : 81.66% ( 187/229 )
+Functions    : 78.13% ( 25/32 )
+Lines        : 90.86% ( 318/350 )
+================================================================================
+```
+
+## Documentation
+```
+npm doc
 ```

examples/compressedStream.ts

@@ -0,0 +1,41 @@
+// Compressed Stream Parsing
+
+import { XmlParser } from "../";
+import { StreamZip } from "node-stream-zip";
+
+const zip = new StreamZip({
+    file: archiveName,
+    storeEntries: true
+});
+
+
+const opts = {}; // see `Available Constructor Options` section below.
+
+const parser = new XmlParser(opts);
+
+parser.on("item", (item) => {
+	// consume the item object here
+});
+
+parser.on("end", () => {
+	// parsing ended no more data events will be raised
+});
+
+parser.on("error", (error) => {
+	// error occurred
+	// NOTE: when error event emitted no end event will be emitted
+	console.error(error);
+});
+
+xmlStream.pipe(parser); // pipe your input xmlStream to parser.
+// readable
+parser.on("readable", () => {
+	// if you don't want to consume "data" on "data" events you can wait for readable event and consume data by calling parser.read()
+});
+
+zip.on("ready", () => {
+    zip.stream('path/inside/zip.xml', (err, stm) => {
+        stm.pipe(parser);
+        stm.on('end', () => zip.close());
+    });
+});

examples/interestedNodes.ts

@@ -0,0 +1,27 @@
+// By listening for interested nodes.
+
+import { XmlParser } from "../";
+
+const opts = {}; // see `Available Constructor Options` section below.
+
+const parser = new XmlParser(opts);
+
+parser.on("item", (item) => {
+	// consume the item object here
+});
+
+parser.on("end", () => {
+	// parsing ended no more data events will be raised
+});
+
+parser.on("error", (error) => {
+	// error occurred
+	// NOTE: when error event emitted no end event will be emitted
+	console.error(error);
+});
+
+xmlStream.pipe(parser); // pipe your input xmlStream to parser.
+// readable
+parser.on("readable", () => {
+	// if you don't want to consume "data" on "data" events you can wait for readable event and consume data by calling parser.read()
+});

examples/parse.ts

@@ -0,0 +1,11 @@
+// By passing a string or buffer to parse function
+
+import { XmlParser } from "../";
+
+const opts = { resourcePath: "/items/item" }; // resourcePath is manditory when using parse method
+
+const parser = new XmlParser(opts);
+
+parser.parse(stringOrBuffer, (err, data) => {
+	// consume data here
+});

examples/reasourcePathRead.ts

@@ -0,0 +1,27 @@
+// By passing the resourcePath and reading data by calling
+// `read` method instead listening for data events.
+
+import {XmlParser} from "../";
+
+const opts = { resourcePath: "/items/item" };
+
+const parser = new XmlParser(opts);
+
+parser.on("end", () => {
+	// parsing ended no more data events will be raised
+});
+
+parser.on("error", (error) => {
+	// error occurred
+	// NOTE: when error event emitted no end event will be emitted
+	console.error(error);
+});
+
+xmlStream.pipe(parser); // pipe your input xmlStream to parser.
+// readable
+parser.on("readable", () => {
+	// if you don't want to consume "data" on "data" events you can wait
+	// for readable event and consume data by calling parser.read()
+});
+// after readable event occured you can call read method and get data.
+parser.read(); // will return one object at a time.

examples/resourcePath.ts

@@ -0,0 +1,28 @@
+// By passing a resource path.
+
+import { XmlParser } from "../";
+
+const opts = { resourcePath: "/items/item" };
+
+const parser = new XmlParser(opts);
+
+parser.on("data", (data) => {
+	// consume the data object here
+});
+
+parser.on("end", () => {
+	// parsing ended no more data events will be raised
+});
+
+parser.on("error", (error) => {
+	// error occurred
+	// NOTE: when error event emitted no end event will be emitted
+	console.error(error);
+});
+
+xmlStream.pipe(parser); // pipe your input xmlStream to parser.
+// readable
+parser.on("readable", () => {
+	// if you don't want to consume "data" on "data" events you
+	// can wait for readable event and consume data by calling parser.read()
+});

package.json

@@ -1,52 +1,78 @@
 {
-  "version": "0.2.0",
-  "name": "xml-streamer",
-  "description": "XML stream parser for parsing large files efficiently with less usage of memory.",
-  "author": {
-    "name": "Sai Teja",
-    "email": "saitejas464@gmail.com"
-  },
-  "keywords": [
-    "xml",
-    "xml streaming",
-    "xml streamer",
-    "streaming",
-    "xml parser",
-    "xml parsing",
-    "xml2js",
-    "xmltojs",
-    "node-expat",
-    "expat"
-  ],
-  "license": "MIT",
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/Sai1919/xml-streamer"
-  },
-  "dependencies": {
-    "node-expat": "2.3.15",
-    "lodash": "4.16.6"
-  },
-  "devDependencies": {
-    "mocha": "^1.21.4",
-    "should": "11.1.1",
-    "standard": "8.5.0"
-  },
-  "optionalDependencies": {},
-  "main": "./parser",
-  "scripts": {
-    "test": "mocha && standard"
-  },
-  "maintainers": [
-    {
-      "name": "Sai Teja",
-      "email": "saitejas464@gmail.com"
-    }
-  ],
-  "standard": {
-    "globals": [
-      "describe",
-      "it"
-    ]
-  }
+	"version": "0.3.1",
+	"name": "@tabshift/xml-streamer",
+	"description": "XML stream parser for parsing large files efficiently with less usage of memory.",
+	"author": {
+		"name": "Sai Teja",
+		"email": "saitejas464@gmail.com"
+	},
+	"keywords": [
+		"xml",
+		"xml streaming",
+		"xml streamer",
+		"streaming",
+		"xml parser",
+		"xml parsing",
+		"xml2js",
+		"xmltojs",
+		"node-expat",
+		"expat"
+	],
+	"license": "MIT",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/drorgl/xml-streamer"
+	},
+	"dependencies": {
+		"lodash": "4.17.11"
+	},
+	"devDependencies": {
+		"mocha": "^6.1.4",
+		"should": "^13.2.3",
+		"@types/lodash": "^4.14.133",
+		"@types/mocha": "^5.2.7",
+		"@types/node": "^12.0.4",
+		"@types/should": "^13.0.0",
+		"ts-node": "^8.2.0",
+		"tslint": "^5.17.0",
+		"typescript": "^3.5.1",
+		"rimraf": "^2.6.3",
+		"source-map-support": "^0.5.12",
+		"typedoc": "^0.14.2",
+		"nyc": "^14.1.1"
+	},
+	"optionalDependencies": {},
+	"main": "dist/parser.js",
+	"types": "dist/parser.d.ts",
+	"scripts": {
+		"performance-test": "node --prof node_modules/mocha/bin/_mocha -r ts-node/register test/**/*.spec.ts",
+		"performance-process": "node --prof-process isolate...",
+		"test-one": "mocha -r ts-node/register",
+		"test": "mocha -r ts-node/register test/**/*.spec.ts",
+		"lint": "tslint --project .",
+		"dryrun": "tsc -noEmit",
+		"build": "tsc",
+		"prepublish": "rimraf ./dist && npm run lint && npm run dryrun && npm run test && npm run build",
+		"coverage": "rimraf ./.nyc_output && rimraf ./coverage && nyc mocha -r ts-node/register -r source-map-support/register --ui bdd test/**/*.spec.{ts,tsx}\"",
+		"doc": "rimraf ./docs && typedoc",
+		"publish-now": "npm publish --access public"
+	},
+	"contributors": [
+		{
+			"name": "Dror Gluska",
+			"email": "drorgl@gmail.com"
+		}
+	],
+	"maintainers": [
+		{
+			"name": "Sai Teja",
+			"email": "saitejas464@gmail.com"
+		}
+	],
+	"standard": {
+		"globals": [
+			"describe",
+			"it"
+		]
+	}
 }

parser.js

@@ -1,299 +0,0 @@
-var expat = require('node-expat')
-var _ = require('lodash')
-var util = require('util')
-var stream = require('stream')
-
-var ParserState = require('./parserState')
-var defaults = {
-  resourcePath: '',
-  emitOnNodeName: false,
-  attrsKey: '$',
-  textKey: '_',
-  explicitArray: true
-}
-
-function XmlParser (opts) {
-  this.opts = _.defaults(opts, defaults)
-  this.parserState = new ParserState()
-  this.parser = new expat.Parser('UTF-8')
-  stream.Transform.call(this)
-  this._readableState.objectMode = true
-}
-util.inherits(XmlParser, stream.Transform)
-
-XmlParser.prototype.checkForInterestedNodeListeners = function () {
-  var ignore = [ 'end', 'prefinish', 'data', 'error' ]
-  var eventNames = Object.keys(this._events)
-
-  for (var i = 0; i < eventNames.length; i++) {
-    if (_.includes(ignore, eventNames[i], 0)) continue
-    this.parserState.interestedNodes.push(eventNames[i])
-  }
-}
-
-XmlParser.prototype._transform = function (chunk, encoding, callback) {
-  if (encoding !== 'buffer') this.emit('error', new Error('unsupported encoding'))
-
-  this.processChunk(chunk)
-  callback()
-}
-
-XmlParser.prototype.processChunk = function (chunk) {
-  var parser = this.parser
-  var state = this.parserState
-
-  if (state.isRootNode) {
-    this.checkForInterestedNodeListeners()
-    registerEvents.call(this)
-  }
-
-  if (typeof chunk === 'string') {
-    if (!parser.parse('', true)) processError.call(this)
-  } else {
-    if (!parser.parse(chunk.toString())) processError.call(this)
-  }
-}
-
-XmlParser.prototype.parse = function (chunk, cb) {
-  var parser = this.parser
-  var state = this.parserState
-  var error
-
-  if (state.isRootNode) {
-    this.checkForInterestedNodeListeners()
-    registerEvents.call(this)
-  }
-
-  if (typeof chunk === Buffer) chunk = chunk.toString()
-
-  this.on('error', function (err) {
-    error = err
-  })
-
-  if (!parser.parse(chunk)) {
-    error = processError.call(this)
-  }
-
-  if (error) return cb(error)
-
-  return cb(null, this._readableState.buffer)
-}
-
-function registerEvents () {
-  var scope = this
-  var parser = this.parser
-  var state = this.parserState
-  var lastIndex
-  var resourcePath = this.opts.resourcePath
-  var attrsKey = this.opts.attrsKey
-  var textKey = this.opts.textKey
-  var interestedNodes = state.interestedNodes
-  var explicitArray = this.opts.explicitArray
-
-  parser.on('startElement', function (name, attrs) {
-    if (state.isRootNode) validateResourcePath(name)
-    state.currentPath = state.currentPath + '/' + name
-    checkForResourcePath(name)
-    if (state.isPathfound) processStartElement(name, attrs)
-  })
-
-  parser.on('endElement', function (name) {
-    state.lastEndedNode = name
-    lastIndex = state.currentPath.lastIndexOf('/' + name)
-    state.currentPath = state.currentPath.substring(0, lastIndex)
-    if (state.isPathfound) processEndElement(name)
-    checkForResourcePath(name)
-  })
-
-  parser.on('text', function (text) {
-    if (state.isPathfound) processText(text)
-  })
-
-  parser.on('error', function (err) {
-    processError.call(this, err)
-  })
-
-  function processStartElement (name, attrs) {
-    if (!name) return
-
-    var obj = {}
-    if (attrs && !_.isEmpty(attrs)) obj[attrsKey] = attrs
-    var tempObj = state.object
-    var path = getRelativePath(name)
-    if (!path) {
-      if (attrs && !_.isEmpty(attrs)) state.object[attrsKey] = attrs
-      return
-    }
-    var tokens = path.split('.')
-
-    for (var i = 0; i < tokens.length; i++) {
-      if (tempObj[tokens[i]] && !(explicitArray === false && i === tokens.length - 1)) {
-        tempObj = tempObj[tokens[i]]
-      } else {
-        // if explicitArray is true then create each node as array
-        // irrespective of how many nodes are there with same name.
-        tempObj[tokens[i]] = explicitArray ? [] : obj
-        tempObj = tempObj[tokens[i]]
-      }
-      if (Array.isArray(tempObj) && i !== tokens.length - 1) tempObj = tempObj[tempObj.length - 1]
-    }
-
-    if (Array.isArray(tempObj)) {
-      tempObj.push(obj)
-    }
-  }
-
-  function processEndElement (name) {
-    if (resourcePath) {
-      var index = resourcePath.lastIndexOf('/')
-      var rpath = resourcePath.substring(0, index)
-
-      if (rpath === state.currentPath) {
-        scope.push(state.object)
-        if (scope.opts.emitOnNodeName) scope.emit(name, state.object)
-        state.object = {}
-      }
-    } else {
-      if (_.includes(interestedNodes, name, 0)) {
-        emitInterestedNode(name)
-        if (state.firstFoundNode === name) {
-          state.object = {}
-          state.firstFoundNode = ''
-          state.isPathfound = false
-        }
-      }
-    }
-  }
-
-  function emitInterestedNode (name) {
-    var index
-    var xpath
-    var pathTokens
-
-    xpath = state.currentPath.substring(1)
-    pathTokens = xpath.split('/')
-    pathTokens.push(name)
-    index = pathTokens.indexOf(state.firstFoundNode)
-    pathTokens = _.drop(pathTokens, index + 1)
-    var tempObj = state.object
-    for (var i = 0; i < pathTokens.length; i++) {
-      tempObj = tempObj[pathTokens[i]]
-    }
-    if (Array.isArray(tempObj)) tempObj = tempObj[tempObj.length - 1]
-    scope.emit(name, tempObj)
-    scope.push(tempObj)
-  }
-
-  function processText (text) {
-    if (!text || !/\S/.test(text)) {
-      return
-    }
-    var path = getRelativePath()
-    var tempObj = state.object
-    if (!path) {
-      if (!state.object[textKey]) state.object[textKey] = ''
-      state.object[textKey] = state.object[textKey] + text
-      return
-    }
-    var tokens = path.split('.')
-    for (var i = 0; i < tokens.length; i++) {
-      if (tempObj[tokens[i]]) {
-        tempObj = tempObj[tokens[i]]
-      } else {
-        tempObj[tokens[i]] = explicitArray ? [] : {}
-        tempObj = tempObj[tokens[i]]
-      }
-      if (Array.isArray(tempObj) && i !== tokens.length - 1) tempObj = tempObj[tempObj.length - 1]
-    }
-
-    if (Array.isArray(tempObj)) {
-      var obj = tempObj[tempObj.length - 1]
-      if (!obj[textKey]) obj[textKey] = ''
-      obj[textKey] = obj[textKey] + text
-    } else {
-      if (!tempObj[textKey]) tempObj[textKey] = ''
-      tempObj[textKey] = tempObj[textKey] + text
-    }
-  }
-
-  function checkForResourcePath (name) {
-    if (resourcePath) {
-      if (state.currentPath.indexOf(resourcePath) === 0) {
-        state.isPathfound = true
-      } else {
-        state.isPathfound = false
-      }
-    } else {
-      if (_.includes(interestedNodes, name, 0)) {
-        state.isPathfound = true
-        if (!state.firstFoundNode) {
-          state.firstFoundNode = name
-        }
-      }
-    }
-  }
-
-  function getRelativePath () {
-    var tokens
-    var jsonPath
-    var index
-
-    if (resourcePath) {
-      var xpath = state.currentPath.substring(resourcePath.length)
-
-      if (!xpath) return
-      if (xpath[0] === '/') xpath = xpath.substring(1)
-      tokens = xpath.split('/')
-      jsonPath = tokens.join('.')
-    } else {
-      xpath = state.currentPath.substring(1)
-      tokens = xpath.split('/')
-      index = tokens.indexOf(state.firstFoundNode)
-      tokens = _.drop(tokens, index + 1)
-      jsonPath = tokens.join('.')
-    }
-    return jsonPath
-  }
-
-  function validateResourcePath (name) {
-    var temp
-    var index
-
-    state.isRootNode = false
-
-    if (resourcePath) {
-      if (resourcePath[0] === '/') {
-        temp = resourcePath.substring(1, resourcePath.length)
-      } else {
-        temp = resourcePath
-      }
-      index = temp.indexOf('/')
-      if (index !== -1) temp = temp.substring(0, index)
-      if (temp !== name) {
-        scope.end()
-      }
-    }
-  }
-}
-
-function processError (err) {
-  var parser = this.parser
-  var error = ''
-
-  if (err) {
-    error = err
-  } else {
-    error = parser.getError()
-  }
-  error = new Error(error + ' at line no: ' + parser.getCurrentLineNumber())
-  this.emit('error', error)
-  return error
-}
-
-XmlParser.prototype._flush = function (callback) {
-  this.processChunk('')
-  callback()
-}
-
-module.exports = XmlParser
-

parserState.js

@@ -1,13 +0,0 @@
-
-function ParserState () {
-  this.currentPath = ''
-  this.lastEndedNode = ''
-  this.isPathfound = false
-  this.object = {}
-  this.paused = false
-  this.isRootNode = true
-  this.firstFoundNode = ''
-  this.interestedNodes = []
-}
-
-module.exports = ParserState

src/ltx.ts

@@ -0,0 +1,228 @@
+// Source: https://github.com/xmppjs/ltx/blob/master/lib/parsers/ltx.js
+import events from 'events'
+import { unescapeXML } from './unescape'
+
+const STATE_TEXT = 0
+const STATE_IGNORE_COMMENT = 1
+const STATE_IGNORE_INSTRUCTION = 2
+const STATE_TAG_NAME = 3
+const STATE_TAG = 4
+const STATE_ATTR_NAME = 5
+const STATE_ATTR_EQ = 6
+const STATE_ATTR_QUOT = 7
+const STATE_ATTR_VALUE = 8
+const STATE_CDATA = 9
+
+const lineCounterRegExp = new RegExp('\n', 'g')
+
+export class SaxLtx extends events.EventEmitter {
+	public remainder: string
+	public tagName: string
+	public attrs: any
+	public endTag: boolean
+	public selfClosing: boolean
+	public attrQuote: number
+	public attrQuoteChar: string
+	public recordStart = 0
+	public attrName: string
+	public state = STATE_TEXT
+
+	public currentLineNumber = 0
+
+	constructor() {
+		super()
+	}
+
+	public getCurrentLineNumber() {
+		return this.currentLineNumber + 1
+	}
+
+	public end(data?: Buffer) {
+		if (data) {
+			this.write(data)
+		}
+
+		this.removeAllListeners()
+	}
+	public write(data: Buffer | string) {
+		if (typeof data !== 'string') {
+			data = data.toString()
+		}
+
+		let pos = 0
+		const self = this
+
+		/* Anything from previous write()? */
+		if (self.remainder) {
+			data = self.remainder + data
+			pos += self.remainder.length
+			self.remainder = null
+		}
+
+		function endRecording() {
+			if (typeof self.recordStart === 'number') {
+				const recorded = (data as string).substring(self.recordStart, pos)
+				self.recordStart = undefined
+				return recorded
+			}
+		}
+
+		let prevPos = pos
+
+		for (; pos < data.length; pos++) {
+			if (self.state === STATE_TEXT) {
+				// if we're looping through text, fast-forward using indexOf to
+				// the next '<' character
+				const lt = data.indexOf('<', pos)
+				if (lt !== -1 && pos !== lt) {
+					pos = lt
+				}
+			} else if (self.state === STATE_ATTR_VALUE) {
+				// if we're looping through an attribute, fast-forward using
+				// indexOf to the next end quote character
+				const quot = data.indexOf(self.attrQuoteChar, pos)
+				if (quot !== -1) {
+					pos = quot
+				}
+			} else if (self.state === STATE_IGNORE_COMMENT) {
+				// if we're looping through a comment, fast-forward using
+				// indexOf to the first end-comment character
+				const endcomment = data.indexOf('-->', pos)
+				if (endcomment !== -1) {
+					pos = endcomment + 2 // target the '>' character
+				}
+			}
+
+			const newLines = (data.substring(prevPos, pos + 1).match(lineCounterRegExp) || []).length
+			self.currentLineNumber += newLines
+			prevPos = pos
+
+			const c = data.charCodeAt(pos)
+			switch (self.state) {
+				case STATE_TEXT:
+					if (c === 60 /* < */) {
+						const text = endRecording()
+						if (text) {
+							self.emit('text', unescapeXML(text))
+						}
+						self.state = STATE_TAG_NAME
+						self.recordStart = pos + 1
+						self.attrs = {}
+					}
+					break
+				case STATE_CDATA:
+					if (c === 93 /* ] */ && data.substr(pos + 1, 2) === ']>') {
+						const cData = endRecording()
+						if (cData) {
+							self.emit('text', cData)
+						}
+						self.state = STATE_IGNORE_COMMENT
+					}
+					break
+				case STATE_TAG_NAME:
+					if (c === 47 /* / */ && self.recordStart === pos) {
+						self.recordStart = pos + 1
+						self.endTag = true
+					} else if (c === 33 /* ! */) {
+						if (data.substr(pos + 1, 7) === '[CDATA[') {
+							self.recordStart = pos + 8
+							self.state = STATE_CDATA
+						} else if (data.substr(pos + 1, 7) === 'DOCTYPE') {
+							self.recordStart = pos + 8
+							self.state = STATE_TEXT
+						} else {
+							self.recordStart = undefined
+							self.state = STATE_IGNORE_COMMENT
+						}
+					} else if (c === 63 /* ? */) {
+						self.recordStart = undefined
+						self.state = STATE_IGNORE_INSTRUCTION
+					} else if (c <= 32 || c === 47 /* / */ || c === 62 /* > */) {
+						self.tagName = endRecording()
+						pos--
+						self.state = STATE_TAG
+					}
+					break
+				case STATE_IGNORE_COMMENT:
+					if (c === 62 /* > */) {
+						const prevFirst = data.charCodeAt(pos - 1)
+						const prevSecond = data.charCodeAt(pos - 2)
+						if (
+							(prevFirst === 45 /* - */ && prevSecond === 45) /* - */ ||
+							(prevFirst === 93 /* ] */ && prevSecond === 93) /* ] */
+						) {
+							self.state = STATE_TEXT
+						}
+					}
+					break
+				case STATE_IGNORE_INSTRUCTION:
+					if (c === 62 /* > */) {
+						const prev = data.charCodeAt(pos - 1)
+						if (prev === 63 /* ? */) {
+							self.state = STATE_TEXT
+						}
+					}
+					break
+				case STATE_TAG:
+					if (c === 62 /* > */) {
+						self._handleTagOpening(self.endTag, self.tagName, self.attrs)
+						self.tagName = undefined
+						self.attrs = undefined
+						self.endTag = undefined
+						self.selfClosing = undefined
+						self.state = STATE_TEXT
+						self.recordStart = pos + 1
+					} else if (c === 47 /* / */) {
+						self.selfClosing = true
+					} else if (c > 32) {
+						self.recordStart = pos
+						self.state = STATE_ATTR_NAME
+					}
+					break
+				case STATE_ATTR_NAME:
+					if (c <= 32 || c === 61 /* = */) {
+						self.attrName = endRecording()
+						pos--
+						self.state = STATE_ATTR_EQ
+					}
+					break
+				case STATE_ATTR_EQ:
+					if (c === 61 /* = */) {
+						self.state = STATE_ATTR_QUOT
+					}
+					break
+				case STATE_ATTR_QUOT:
+					if (c === 34 /* " */ || c === 39 /* ' */) {
+						self.attrQuote = c
+						self.attrQuoteChar = c === 34 ? '"' : "'"
+						self.state = STATE_ATTR_VALUE
+						self.recordStart = pos + 1
+					}
+					break
+				case STATE_ATTR_VALUE:
+					if (c === self.attrQuote) {
+						const value = unescapeXML(endRecording())
+						self.attrs[self.attrName] = value
+						self.attrName = undefined
+						self.state = STATE_TAG
+					}
+					break
+			}
+		}
+
+		if (typeof self.recordStart === 'number' && self.recordStart <= data.length) {
+			self.remainder = data.slice(self.recordStart)
+			self.recordStart = 0
+		}
+	}
+	private _handleTagOpening(endTag: boolean, tagName: string, attrs: string) {
+		if (!endTag) {
+			this.emit('startElement', tagName, attrs)
+			if (this.selfClosing) {
+				this.emit('endElement', tagName)
+			}
+		} else {
+			this.emit('endElement', tagName)
+		}
+	}
+}

src/parser.ts

@@ -0,0 +1,394 @@
+import _ from 'lodash'
+import stream from 'stream'
+import util from 'util'
+
+import { SaxLtx } from './ltx'
+import { ParserState } from './parserState'
+const defaults = {
+	resourcePath: '',
+	emitOnNodeName: false,
+	attrsKey: '$',
+	textKey: '_',
+	explicitArray: false,
+	verbatimText: false,
+	preserveWhitespace: false
+}
+
+export interface IXmlParserOptions {
+	/**
+	 * Optional field. Used to extract the XML nodes that you are interested in.
+	 *
+	 * @type {string}
+	 * @memberof IXmlParserOptions
+	 */
+	resourcePath?: string
+	/**
+	 * Optional field. Set this to true if you want to listen on node names instead of data event. default: false
+	 *
+	 * @type {boolean}
+	 * @memberof IXmlParserOptions
+	 */
+	emitOnNodeName?: boolean
+	/**
+	 * Optional field. pass the value with which you want to reference attributes of a node in its object form. default: '$'
+	 *
+	 * @type {string}
+	 * @memberof IXmlParserOptions
+	 */
+	attrsKey?: string
+	/**
+	 * Optional field. pass the value with which you want to reference node value in its object form. default: '_'
+	 *
+	 * @type {string}
+	 * @memberof IXmlParserOptions
+	 */
+	textKey?: string
+	/**
+	 * Optional field. Default value is true. All children nodes will come in an array when this option is true.
+	 *
+	 * @type {boolean}
+	 * @memberof IXmlParserOptions
+	 */
+	explicitArray?: boolean
+	/**
+	 * Optional field. Default value is false. When set, text attribute will include all blanks found in xml.
+	 * When unset, blanks are removed as long as they come in one expat single block (blank lines, newlines and entities).
+	 *
+	 * @type {boolean}
+	 * @memberof IXmlParserOptions
+	 */
+	verbatimText?: boolean
+	preserveWhitespace?: boolean
+}
+
+export class XmlParser extends stream.Transform {
+	public parserState: ParserState
+	private opts: IXmlParserOptions
+	private _readableState: { objectMode: true; buffer: any }
+	private parser: SaxLtx
+	constructor(opts?: IXmlParserOptions) {
+		super()
+		this.opts = _.defaults(opts, defaults)
+		this.parserState = new ParserState()
+		this.parser = new SaxLtx()
+		this._readableState.objectMode = true
+	}
+
+	public _flush(callback: () => void) {
+		this.processChunk('')
+		callback()
+	}
+
+	public _transform(chunk: Buffer | string, encoding: string, callback: () => void) {
+		if (encoding !== 'buffer') {
+			this.emit('error', new Error('unsupported encoding'))
+		}
+
+		this.processChunk(chunk)
+		callback()
+	}
+
+	public parse(chunk: Buffer | string, cb: (error: Error, data?: Buffer) => void) {
+		const parser = this.parser
+		const state = this.parserState
+		let error
+
+		if (state.isRootNode) {
+			this.checkForInterestedNodeListeners()
+			registerEvents.call(this)
+		}
+
+		this.on('error', (err) => {
+			error = err
+		})
+
+		if (chunk.length === 0) {
+			parser.end()
+			this.emit('end')
+			this.removeAllListeners()
+		}
+
+		parser.write(chunk)
+
+		if (error) {
+			return cb(error)
+		}
+
+		const result = []
+		while (this._readableState.buffer.length > 0) {
+			result.push(this._readableState.buffer.consume())
+		}
+		return cb(null, result as any)
+	}
+
+	private processChunk(chunk: string | Buffer) {
+		const parser = this.parser
+		const state = this.parserState
+
+		if (state.isRootNode) {
+			this.checkForInterestedNodeListeners()
+			registerEvents.call(this)
+		}
+
+		parser.write(chunk)
+	}
+
+	private checkForInterestedNodeListeners() {
+		const ignore = ['end', 'prefinish', 'data', 'error']
+		const eventNames = Object.keys((this as any)._events)
+
+		// tslint:disable-next-line:prefer-for-of
+		for (let i = 0; i < eventNames.length; i++) {
+			if (_.includes(ignore, eventNames[i], 0)) {
+				continue
+			}
+			this.parserState.interestedNodes.push(eventNames[i])
+		}
+	}
+}
+
+function registerEvents() {
+	const scope = this
+	const parser: SaxLtx = this.parser
+	const state: ParserState = this.parserState
+	let lastIndex
+	const resourcePath = this.opts.resourcePath
+	const attrsKey = this.opts.attrsKey
+	const textKey = this.opts.textKey
+	const interestedNodes = state.interestedNodes
+	const explicitArray = this.opts.explicitArray
+	const verbatimText = this.opts.verbatimText
+	const preserveWhitespace = this.opts.preserveWhitespace
+
+	parser.on('startElement', (name, attrs) => {
+		if (state.isRootNode) {
+			state.isRootNode = false
+		}
+		state.currentPath = state.currentPath + '/' + name
+		checkForResourcePath(name)
+		if (state.isPathfound) {
+			processStartElement(name, attrs)
+		}
+	})
+
+	parser.on('endElement', (name) => {
+		state.lastEndedNode = name
+		lastIndex = state.currentPath.lastIndexOf('/' + name)
+		if (state.currentPath.substring(lastIndex + 1).indexOf('/') !== -1) {
+			processError.call(this, `mismatched tag`)
+		}
+		state.currentPath = state.currentPath.substring(0, lastIndex)
+		if (state.isPathfound) {
+			processEndElement(name)
+		}
+		checkForResourcePath(name)
+	})
+
+	parser.on('text', (text) => {
+		if (state.isPathfound) {
+			processText(text)
+		}
+	})
+
+	parser.on('error', function (err) {
+		processError.call(this, err)
+	})
+
+	function processStartElement(name: string, attrs: any) {
+		if (!name) {
+			return
+		}
+
+		const obj: any = {}
+		if (attrs && !_.isEmpty(attrs)) {
+			obj[attrsKey] = attrs
+		}
+		let tempObj = state.object
+		const path = getRelativePath(/*name*/)
+		if (!path) {
+			if (attrs && !_.isEmpty(attrs)) {
+				state.object[attrsKey] = attrs
+			}
+			return
+		}
+		const tokens = path.split('.')
+
+		for (let i = 0; i < tokens.length; i++) {
+			const token = tokens[i]
+			const isLastToken = i === tokens.length - 1
+			const doesTokenExist = token in tempObj
+
+			if (!doesTokenExist) {
+				tempObj[token] = explicitArray ? [] : obj
+			} else {
+				if (!Array.isArray(tempObj[token]) && isLastToken) tempObj[token] = [tempObj[token]]
+			}
+
+			tempObj = tempObj[token]
+
+			if (Array.isArray(tempObj) && !isLastToken) {
+				tempObj = tempObj[tempObj.length - 1]
+			}
+		}
+
+		if (Array.isArray(tempObj)) {
+			tempObj.push(obj)
+		}
+	}
+
+	function processEndElement(name: string) {
+		if (resourcePath) {
+			const index = resourcePath.lastIndexOf('/')
+			const rpath = resourcePath.substring(0, index)
+
+			if (rpath === state.currentPath) {
+				scope.push(state.object)
+				if (scope.opts.emitOnNodeName) {
+					scope.emit(name, state.object)
+				}
+				state.object = {}
+			}
+		} else {
+			if (_.includes(interestedNodes, name, 0)) {
+				emitInterestedNode(name)
+				if (state.firstFoundNode === name) {
+					state.object = {}
+					state.firstFoundNode = ''
+					state.isPathfound = false
+				}
+			}
+		}
+	}
+
+	function emitInterestedNode(name: string) {
+		let index
+		let xpath
+		let pathTokens
+
+		xpath = state.currentPath.substring(1)
+		pathTokens = xpath.split('/')
+		pathTokens.push(name)
+		index = pathTokens.indexOf(state.firstFoundNode)
+		pathTokens = _.drop(pathTokens, index + 1)
+		let tempObj = state.object
+		// tslint:disable-next-line:prefer-for-of
+		for (let i = 0; i < pathTokens.length; i++) {
+			tempObj = tempObj[pathTokens[i] as any]
+		}
+		if (Array.isArray(tempObj)) {
+			tempObj = tempObj[tempObj.length - 1]
+		}
+
+		scope.emit(name, tempObj)
+		scope.push(tempObj)
+	}
+
+	function processText(text: string) {
+		if (!text || (!verbatimText && !/\S/.test(text))) {
+			return
+		}
+
+		const path = getRelativePath()
+		let tempObj = state.object
+		if (!path) {
+			if (!state.object[textKey]) {
+				state.object[textKey] = ''
+			}
+			state.object[textKey] = state.object[textKey] + text
+			if (!preserveWhitespace) {
+				state.object[textKey] = state.object[textKey].replace(/\s+/g, ' ').trim()
+			}
+			return
+		}
+		const tokens = path.split('.')
+		for (let i = 0; i < tokens.length; i++) {
+			if (tempObj[tokens[i]]) {
+				tempObj = tempObj[tokens[i]]
+			} else {
+				tempObj[tokens[i]] = explicitArray ? [] : {}
+				tempObj = tempObj[tokens[i]]
+			}
+			if (Array.isArray(tempObj) && i !== tokens.length - 1) {
+				tempObj = tempObj[tempObj.length - 1]
+			}
+		}
+
+		if (Array.isArray(tempObj)) {
+			const obj = tempObj[tempObj.length - 1]
+			if (!obj[textKey]) {
+				obj[textKey] = ''
+			}
+			obj[textKey] = obj[textKey] + text
+
+			if (!preserveWhitespace) {
+				obj[textKey] = obj[textKey].replace(/\s+/g, ' ').trim()
+			}
+		} else {
+			if (!tempObj[textKey]) {
+				tempObj[textKey] = ''
+			}
+			tempObj[textKey] = tempObj[textKey] + text
+
+			if (!preserveWhitespace) {
+				tempObj[textKey] = tempObj[textKey].replace(/\s+/g, ' ').trim()
+			}
+		}
+	}
+
+	function checkForResourcePath(name: string) {
+		if (resourcePath) {
+			if (state.currentPath.indexOf(resourcePath) === 0) {
+				state.isPathfound = true
+			} else {
+				state.isPathfound = false
+			}
+		} else {
+			if (_.includes(interestedNodes, name, 0)) {
+				state.isPathfound = true
+				if (!state.firstFoundNode) {
+					state.firstFoundNode = name
+				}
+			}
+		}
+	}
+
+	function getRelativePath() {
+		let tokens
+		let jsonPath
+		let index
+
+		if (resourcePath) {
+			let xpath = state.currentPath.substring(resourcePath.length)
+
+			if (!xpath) {
+				return
+			}
+			if (xpath[0] === '/') {
+				xpath = xpath.substring(1)
+			}
+			tokens = xpath.split('/')
+			jsonPath = tokens.join('.')
+		} else {
+			const xpath = state.currentPath.substring(1)
+			tokens = xpath.split('/')
+			index = tokens.indexOf(state.firstFoundNode)
+			tokens = _.drop(tokens, index + 1)
+			jsonPath = tokens.join('.')
+		}
+		return jsonPath
+	}
+}
+
+function processError(err: Error) {
+	const parser = this.parser
+	let error: Error = null
+
+	if (err) {
+		error = err
+	} else {
+		error = parser.getError()
+	}
+	error = new Error(`${error} at line no: ${parser.getCurrentLineNumber()}`)
+	this.emit('error', error)
+	return error
+}

src/parserState.ts

@@ -0,0 +1,10 @@
+export class ParserState {
+	public currentPath = ''
+	public lastEndedNode = ''
+	public isPathfound = false
+	public object: any = {}
+	public paused = false
+	public isRootNode = true
+	public firstFoundNode = ''
+	public interestedNodes: string[] = []
+}

src/unescape.ts

@@ -0,0 +1,86 @@
+const escapeXMLTable: { [char: string]: string } = {
+	'&': '&',
+	'<': '&lt;',
+	'>': '&gt;',
+	'"': '&quot;',
+	"'": '&apos;'
+}
+
+function escapeXMLReplace(match: string) {
+	return escapeXMLTable[match]
+}
+
+const unescapeXMLTable: { [char: string]: string } = {
+	'&amp;': '&',
+	'&lt;': '<',
+	'&gt;': '>',
+	'&quot;': '"',
+	'&apos;': "'"
+}
+
+function unescapeXMLReplace(match: string) {
+	if (match[1] === '#') {
+		let num
+		if (match[2] === 'x') {
+			num = parseInt(match.slice(3), 16)
+		} else {
+			num = parseInt(match.slice(2), 10)
+		}
+		// https://www.w3.org/TR/xml/#NT-Char defines legal XML characters:
+		// #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
+		if (
+			num === 0x9 ||
+			num === 0xa ||
+			num === 0xd ||
+			(num >= 0x20 && num <= 0xd7ff) ||
+			(num >= 0xe000 && num <= 0xfffd) ||
+			(num >= 0x10000 && num <= 0x10ffff)
+		) {
+			return String.fromCodePoint(num)
+		}
+		throw new Error('Illegal XML character 0x' + num.toString(16))
+	}
+	if (unescapeXMLTable[match]) {
+		return unescapeXMLTable[match] || match
+	}
+	throw new Error('Illegal XML entity ' + match)
+}
+
+export function escapeXML(s: string) {
+	return s.replace(/&|<|>|"|'/g, escapeXMLReplace)
+}
+
+export function unescapeXML(s: string) {
+	let result = ''
+	let start = -1
+	let end = -1
+	let previous = 0
+	start = s.indexOf('&', previous)
+	end = s.indexOf(';', start + 1)
+
+	while (start !== -1 && end !== -1) {
+		result = result + s.substring(previous, start) + unescapeXMLReplace(s.substring(start, end + 1))
+		previous = end + 1
+		start = s.indexOf('&', previous)
+		end = s.indexOf(';', start + 1)
+	}
+
+	// shortcut if loop never entered:
+	// return the original string without creating new objects
+	if (previous === 0) {
+		return s
+	}
+
+	// push the remaining characters
+	result = result + s.substring(previous)
+
+	return result
+}
+
+export function escapeXMLText(s: string) {
+	return s.replace(/&|<|>/g, escapeXMLReplace)
+}
+
+export function unescapeXMLText(s: string) {
+	return s.replace(/&(amp|#38|lt|#60|gt|#62);/g, unescapeXMLReplace)
+}

test/TestFiles/corrupted.xml

@@ -3,6 +3,7 @@
 <item id="1" test= 'hello'>
   <subitem sub= "TESTING SUB">one</subitem>
   <subitem sub= "2">two</subitem>
+  <subitem sub= "2"/>
 <item id="2">
   <subitem>three</subitem>
   <subitem>four</subitem>

test/basic.spec.ts

@@ -0,0 +1,153 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+
+describe('Basic behavior', () => {
+	it('should properly parse a simple file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const actualData: string[] = []
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			should(err).not.be.ok()
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', actualData)
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(dataEventCount).equal(2)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a medium size file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(10)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a file containing many nodes.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/manyItems.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(296)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a xml simple file in which nodes contain text values randomly.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/randomText.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				_: 'item one two',
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				_: 'item one two three four',
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const actualData: string[] = []
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', JSON.stringify(actualData, null, 1))
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(dataEventCount).equal(2)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a huge file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/hugeFile.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		// console.log(parser)
+		let dataEventCount = 0
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(2072)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/cdata_and_comments.spec.ts

@@ -0,0 +1,30 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+describe('CData and comments in xml', () => {
+	it('should properly parse a simple file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/CData-comments.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(296)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/emit.spec.ts

@@ -0,0 +1,138 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+describe('emitOnNodeName', () => {
+	it('should properly emit events on node names.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', emitOnNodeName: true })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const actualData: string[] = []
+		const itemData: string[] = []
+		let dataEventCount = 0
+		let itemCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('item', (item) => {
+			itemData.push(item)
+			itemCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', actualData)
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(dataEventCount).equal(2)
+			should(itemData).deepEqual(expectedData)
+			should(itemCount).equal(2)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly emit events on node names while parsing a medium size file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', emitOnNodeName: true })
+
+		let dataEventCount = 0
+		let itemCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('item', (data) => {
+			itemCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(10)
+			should(itemCount).equal(10)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a file containing many nodes.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/manyItems.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', emitOnNodeName: true })
+
+		let dataEventCount = 0
+		let itemCount = 0
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('item', (data) => {
+			itemCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(296)
+			should(itemCount).equal(296)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a huge file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/hugeFile.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', emitOnNodeName: true })
+
+		let dataEventCount = 0
+		let itemCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('item', (item) => {
+			itemCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(2072)
+			should(itemCount).equal(2072)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/error.spec.ts

@@ -0,0 +1,44 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+describe.skip('Error Handling', () => {
+	it('should properly return error if the xml file is corrupted.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/corrupted.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			// console.log(err)
+			should(err.message).equal('mismatched tag at line no: 12')
+			done()
+		})
+
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly return error if the large xml file is corrupted.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/largeCorruptedFile.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			// console.log(err)
+			should(err.message).equal('mismatched tag at line no: 8346')
+			done()
+		})
+
+		xmlStream.pipe(parser)
+	})
+})

test/explicit_array.spec.ts

@@ -0,0 +1,270 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+describe('should respect explicitArray constructor option', () => {
+	it('should properly parse a simple file with explicitArray set to false.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', explicitArray: false })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: { $: { sub: '2' }, _: 'two' }
+			},
+			{
+				$: { id: '2' },
+				subitem: { _: 'five' }
+			}
+		]
+
+		parser.parse(xml.toString(), (err, data) => {
+			if (err) {
+				done(err)
+			}
+			// console.log('data=', JSON.stringify(data))
+			should(data).deepEqual(expectedData)
+			done()
+		})
+	})
+
+	it('should properly parse a medium size file with explicitArray set to false.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/medium.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', explicitArray: false })
+		const expectedData = [
+			{
+				$: {
+					id: '1',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			},
+			{
+				$: {
+					id: '2'
+				},
+				subitem: {
+					_: 'five'
+				}
+			},
+			{
+				$: {
+					id: '3',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			},
+			{
+				$: {
+					id: '4',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			},
+			{
+				$: {
+					id: '5',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			},
+			{
+				$: {
+					id: '6',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			},
+			{
+				$: {
+					id: '7',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			},
+			{
+				$: {
+					id: '8',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			},
+			{
+				$: {
+					id: '9',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			},
+			{
+				$: {
+					id: '10',
+					test: 'hello'
+				},
+				subitem: {
+					$: {
+						sub: '2'
+					},
+					_: 'two'
+				}
+			}
+		]
+		parser.parse(xml, (err, data) => {
+			if (err) {
+				done(err)
+			}
+
+			should(data).deepEqual(expectedData)
+			should(data.length).equal(10)
+			done()
+		})
+	})
+
+	it('should properly parse a file containing many nodes when explicitArray set to false.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/manyItems.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', explicitArray: false })
+
+		parser.parse(xml, (err, data) => {
+			if (err) {
+				done(err)
+			}
+
+			should(data.length).equal(296)
+			done()
+		})
+	})
+
+	it('should properly parse a xml simple file in which nodes contain text values randomly when explicitArray set to false.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/randomText.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', explicitArray: false })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				_: 'item one two',
+				subitem: { $: { sub: '2' }, _: 'two' }
+			},
+			{
+				$: { id: '2' },
+				_: 'item one two three four',
+				subitem: { _: 'five' }
+			}
+		]
+
+		parser.parse(xml, (err, data) => {
+			if (err) {
+				done(err)
+			}
+
+			should(data).deepEqual(expectedData)
+			should(data.length).equal(2)
+			done()
+		})
+	})
+
+	it('should properly parse a huge file with explicitArray set to false.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/hugeFile.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', explicitArray: false })
+		// console.log(parser)
+		parser.parse(xml, (err, data) => {
+			if (err) {
+				done(err)
+			}
+			should(data.length).equal(2072)
+			done()
+		})
+	})
+
+	it('should properly return error if the xml file is corrupted.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/corrupted.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', explicitArray: false })
+
+		parser.parse(xml, (err, data) => {
+			// console.log(err)
+			should(err.message).equal('mismatched tag at line no: 12')
+			should(data).not.be.ok()
+			done()
+		})
+	})
+
+	it('should properly generate objects when special symbols are passed as attrs and text keys and explicitArray is false in the options.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({
+			resourcePath: '/items/item',
+			attrsKey: '!',
+			textKey: '%',
+			explicitArray: false
+		})
+		const expectedData = [
+			{
+				'!': { id: '1', test: 'hello' },
+				subitem: { '!': { sub: '2' }, '%': 'two' }
+			},
+			{
+				'!': { id: '2' },
+				subitem: { '%': 'five' }
+			}
+		]
+		const actualData: string[] = []
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', JSON.stringify(actualData, null, 1))
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(dataEventCount).equal(2)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/interested.spec.ts

@@ -0,0 +1,336 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+
+describe('interested Nodes', () => {
+	it('should properly parse a simple file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser()
+
+		const expectedData = [
+			{ $: { sub: 'TESTING SUB' }, _: 'one' },
+			{ $: { sub: '2' }, _: 'two' },
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{ _: 'three' },
+			{ _: 'four' },
+			{ _: 'five' },
+			{
+				$: { id: '2' },
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+
+		const actualData: string[] = []
+		let dataEventCount = 0
+		const expectedItems = [
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const actualItems: string[] = []
+		const actualSubitems: string[] = []
+		const expectedSubitems = [
+			{ $: { sub: 'TESTING SUB' }, _: 'one' },
+			{ $: { sub: '2' }, _: 'two' },
+			{ _: 'three' },
+			{ _: 'four' },
+			{ _: 'five' }
+		]
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			should(err).not.be.ok()
+			done(err)
+		})
+
+		parser.on('item', (item) => {
+			actualItems.push(item)
+		})
+
+		parser.on('subitem', (subitem) => {
+			actualSubitems.push(subitem)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', JSON.stringify(actualData, null, 1))
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(actualItems).deepEqual(expectedItems)
+			should(actualSubitems).deepEqual(expectedSubitems)
+			should(actualSubitems.length).equal(5)
+			should(actualItems.length).equal(2)
+			should(dataEventCount).equal(7)
+			done()
+		})
+
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a medium size file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
+		const parser = new XmlParser()
+
+		let dataEventCount = 0
+		let itemEventCount = 0
+		let subitemEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('item', (item) => {
+			itemEventCount++
+		})
+
+		parser.on('subitem', (subitem) => {
+			subitemEventCount++
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			// console.log('itemEventCount=', itemEventCount)
+			// console.log('subitemEventCount=', subitemEventCount)
+			should(dataEventCount).equal(31)
+			should(itemEventCount).equal(10)
+			should(subitemEventCount).equal(21)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a file containing many nodes.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/manyItems.xml')
+		const parser = new XmlParser()
+
+		let dataEventCount = 0
+		let itemEventCount = 0
+		let subitemEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('item', (item) => {
+			itemEventCount++
+		})
+
+		parser.on('subitem', (subitem) => {
+			subitemEventCount++
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			// console.log('itemEventCount=', itemEventCount)
+			// console.log('subitemEventCount=', subitemEventCount)
+			should(itemEventCount).equal(296)
+			should(subitemEventCount).equal(600)
+			should(dataEventCount).equal(896)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a xml simple file in which nodes contain text values randomly.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/randomText.xml')
+		const parser = new XmlParser()
+		const expectedData = [
+			{ $: { sub: 'TESTING SUB' }, _: 'one' },
+			{ $: { sub: '2' }, _: 'two' },
+			{
+				$: { id: '1', test: 'hello' },
+				_: 'item one two',
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{ _: 'three' },
+			{ _: 'four' },
+			{ _: 'five' },
+			{
+				$: { id: '2' },
+				_: 'item one two three four',
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const expectedItems = [
+			{
+				$: { id: '1', test: 'hello' },
+				_: 'item one two',
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				_: 'item one two three four',
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const actualItems: string[] = []
+		const actualSubitems: string[] = []
+		const expectedSubitems = [
+			{ $: { sub: 'TESTING SUB' }, _: 'one' },
+			{ $: { sub: '2' }, _: 'two' },
+			{ _: 'three' },
+			{ _: 'four' },
+			{ _: 'five' }
+		]
+		const actualData: string[] = []
+		let dataEventCount = 0
+		let itemEventCount = 0
+		let subitemEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('item', (item) => {
+			itemEventCount++
+			actualItems.push(item)
+		})
+
+		parser.on('subitem', (subitem) => {
+			subitemEventCount++
+			actualSubitems.push(subitem)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', JSON.stringify(actualData, null, 1))
+			// console.log('dataEventCount=', dataEventCount)
+			// console.log('itemEventCount=', itemEventCount)
+			// console.log('subitemEventCount=', subitemEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(actualItems).deepEqual(expectedItems)
+			should(actualSubitems).deepEqual(expectedSubitems)
+			should(dataEventCount).equal(7)
+			should(itemEventCount).equal(2)
+			should(subitemEventCount).equal(5)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a huge file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/hugeFile.xml')
+		const parser = new XmlParser()
+
+		let dataEventCount = 0
+		let itemEventCount = 0
+		let subitemEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('item', (item) => {
+			itemEventCount++
+		})
+
+		parser.on('subitem', (subitem) => {
+			subitemEventCount++
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			// console.log('itemEventCount=', itemEventCount)
+			// console.log('subitemEventCount=', subitemEventCount)
+			should(dataEventCount).equal(6272)
+			should(itemEventCount).equal(2072)
+			should(subitemEventCount).equal(4200)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a simple file and return when root element when listening on it.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser()
+		const expectedData = [
+			{
+				item: [
+					{
+						$: { id: '1', test: 'hello' },
+						subitem: [
+							{ $: { sub: 'TESTING SUB' }, _: 'one' },
+							{ $: { sub: '2' }, _: 'two' }
+						]
+					},
+					{
+						$: { id: '2' },
+						subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+					}
+				]
+			}
+		]
+
+		const actualData: string[] = []
+		let dataEventCount = 0
+		let itemsEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			should(err).not.be.ok()
+			done(err)
+		})
+
+		parser.on('items', (item) => {
+			itemsEventCount++
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', JSON.stringify(actualData, null, 1))
+			// console.log('dataEventCount=', dataEventCount)
+			// console.log('itemEventCount=', itemsEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(itemsEventCount).equal(1)
+			should(dataEventCount).equal(1)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/options.spec.ts

@@ -0,0 +1,123 @@
+import fs from 'fs'
+import 'mocha'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+describe('should respect the options passed', () => {
+	it('should properly generate objects with $ as key for attrs and _ as key for text value of node.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const actualData: string[] = []
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', actualData)
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(dataEventCount).equal(2)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly generate objects with passed attrs and text keys in the options.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', attrsKey: 'attrs', textKey: 'text' })
+		const expectedData = [
+			{
+				attrs: { id: '1', test: 'hello' },
+				subitem: [
+					{ attrs: { sub: 'TESTING SUB' }, text: 'one' },
+					{ attrs: { sub: '2' }, text: 'two' }
+				]
+			},
+			{
+				attrs: { id: '2' },
+				subitem: [{ text: 'three' }, { text: 'four' }, { text: 'five' }]
+			}
+		]
+		const actualData: string[] = []
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', JSON.stringify(actualData, null, 1))
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(dataEventCount).equal(2)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly generate objects when special symbols are passed as attrs and text keys in the options.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item', attrsKey: '!', textKey: '%' })
+		const expectedData = [
+			{
+				'!': { id: '1', test: 'hello' },
+				subitem: [
+					{ '!': { sub: 'TESTING SUB' }, '%': 'one' },
+					{ '!': { sub: '2' }, '%': 'two' }
+				]
+			},
+			{
+				'!': { id: '2' },
+				subitem: [{ '%': 'three' }, { '%': 'four' }, { '%': 'five' }]
+			}
+		]
+		const actualData: string[] = []
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', JSON.stringify(actualData, null, 1))
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(dataEventCount).equal(2)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/parse.spec.ts

@@ -0,0 +1,114 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+describe('Parse function should work properly', () => {
+	it('should properly parse a simple file.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+
+		parser.parse(xml.toString(), (err, data) => {
+			if (err) {
+				done(err)
+			}
+			should(data).deepEqual(expectedData)
+			done()
+		})
+	})
+
+	it('should properly parse a medium size file.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/medium.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+
+		parser.parse(xml, (err, data) => {
+			if (err) {
+				done(err)
+			}
+			should(data.length).equal(10)
+			done()
+		})
+	})
+
+	it('should properly parse a file containing many nodes.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/manyItems.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+
+		parser.parse(xml, (err, data) => {
+			if (err) {
+				done(err)
+			}
+			should(data.length).equal(296)
+			done()
+		})
+	})
+
+	it('should properly parse a xml simple file in which nodes contain text values randomly.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/randomText.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				_: 'item one two',
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				_: 'item one two three four',
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+
+		parser.parse(xml, (err, data) => {
+			if (err) {
+				done(err)
+			}
+			should(data).deepEqual(expectedData)
+			should(data.length).equal(2)
+			done()
+		})
+	})
+
+	it('should properly parse a huge file.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/hugeFile.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		// console.log(parser)
+		parser.parse(xml, (err, data) => {
+			if (err) {
+				done(err)
+			}
+			should(data.length).equal(2072)
+			done()
+		})
+	})
+
+	it('should properly return error if the xml file is corrupted.', (done) => {
+		const xml = fs.readFileSync('./test/TestFiles/corrupted.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+
+		parser.parse(xml, (err, data) => {
+			// console.log(err)
+			should(err.message).equal('mismatched tag at line no: 12')
+			should(data).not.be.ok()
+			done()
+		})
+	})
+})

test/pause_and_resume.spec.ts

@@ -0,0 +1,84 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+describe('pause and resume', () => {
+	it('should properly parse a simple file.', function (done) {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const actualData: string[] = []
+		let dataEventCount = 0
+		let isSetTimeoutHappened = true
+		this.timeout(4000)
+		parser.on('data', (data) => {
+			actualData.push(data)
+			parser.pause()
+			should(isSetTimeoutHappened).equal(true)
+			setTimeout(() => {
+				parser.resume()
+				isSetTimeoutHappened = true
+			}, 1000)
+			dataEventCount++
+			isSetTimeoutHappened = false
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', actualData)
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData).deepEqual(expectedData)
+			should(dataEventCount).equal(2)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should emit data events with 1sec interval between each using pause and resume.', function (done) {
+		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+
+		let dataEventCount = 0
+		let isSetTimeoutHappened = true
+		this.timeout(20000)
+		parser.on('data', (data) => {
+			parser.pause()
+			should(isSetTimeoutHappened).equal(true)
+			setTimeout(() => {
+				parser.resume()
+				isSetTimeoutHappened = true
+			}, 1000)
+			dataEventCount++
+			isSetTimeoutHappened = false
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(10)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/performance.spec.ts

@@ -0,0 +1,102 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+describe.skip('performance testing', () => {
+	it('should properly parse more than 500 MB of file.', function (done) {
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		// var wsStream = fs.createWriteStream('./test/TestFiles/MB_and_GB_size_files/MBFile.xml')
+		// var rsStream = fs.createReadStream('./test/TestFiles/MB_and_GB_size_files/MBFile.xml')
+		let dataEventCount = 0
+		// var maxRSSMemoryTaken = 0
+		// var rss
+		const startTime = Date.now()
+		const xmlStream = new stream.Readable()
+		xmlStream._read = function noop() {
+			// nop
+		}
+		let dataChunk
+		this.timeout(900000)
+		const firstChunk = fs.readFileSync('./test/TestFiles/MB_and_GB_size_files/firstChunk.xml')
+		xmlStream.push(firstChunk)
+		for (let i = 0; i < 2200; i++) {
+			dataChunk = fs.readFileSync('./test/TestFiles/MB_and_GB_size_files/repetitiveChunk.xml')
+			xmlStream.push(dataChunk)
+		}
+
+		const endingChunk = fs.readFileSync('./test/TestFiles/MB_and_GB_size_files/endingChunk.xml')
+		xmlStream.push(endingChunk)
+		xmlStream.push(null)
+		parser.on('data', (data) => {
+			// rss = process.memoryUsage().rss
+			// if (rss > maxRSSMemoryTaken) maxRSSMemoryTaken = rss
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			should(err).not.be.ok()
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			// console.log('RSS memory=', rss)
+			const TimeTaken = Date.now() - startTime
+			// console.log('time taken=', TimeTaken)
+			should(TimeTaken).be.belowOrEqual(300000)
+			should(dataEventCount).equal(4558400)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse more than 1 GB of file.', function (done) {
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		// var wsStream = fs.createWriteStream('./test/TestFiles/MB_and_GB_size_files/MBFile.xml')
+		// var rsStream = fs.createReadStream('./test/TestFiles/MB_and_GB_size_files/MBFile.xml')
+		let dataEventCount = 0
+		// var maxRSSMemoryTaken = 0
+		// var rss
+		const startTime = Date.now()
+		const xmlStream = new stream.Readable()
+		xmlStream._read = function noop() {
+			// nop
+		}
+		let dataChunk
+		this.timeout(900000)
+		const firstChunk = fs.readFileSync('./test/TestFiles/MB_and_GB_size_files/firstChunk.xml')
+		xmlStream.push(firstChunk)
+		for (let i = 0; i < 4400; i++) {
+			dataChunk = fs.readFileSync('./test/TestFiles/MB_and_GB_size_files/repetitiveChunk.xml')
+			xmlStream.push(dataChunk)
+		}
+
+		const endingChunk = fs.readFileSync('./test/TestFiles/MB_and_GB_size_files/endingChunk.xml')
+		xmlStream.push(endingChunk)
+		xmlStream.push(null)
+		parser.on('data', (data) => {
+			// rss = process.memoryUsage().rss
+			// if (rss > maxRSSMemoryTaken) maxRSSMemoryTaken = rss
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			should(err).not.be.ok()
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			// console.log('RSS memory=', rss)
+			const TimeTaken = Date.now() - startTime
+			// console.log('time taken=', TimeTaken)
+			should(TimeTaken).be.belowOrEqual(700000)
+			should(dataEventCount).equal(9116800)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/read.spec.ts

@@ -0,0 +1,117 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+
+describe('read method', () => {
+	it('should properly parse a simple file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const expectedData = [
+			{
+				$: { id: '1', test: 'hello' },
+				subitem: [
+					{ $: { sub: 'TESTING SUB' }, _: 'one' },
+					{ $: { sub: '2' }, _: 'two' }
+				]
+			},
+			{
+				$: { id: '2' },
+				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
+			}
+		]
+		const actualData: string[] = []
+		let obj
+		let Timeout: any
+
+		parser.on('readable', () => {
+			Timeout = setInterval(() => {
+				obj = parser.read()
+				if (obj) {
+					actualData.push(obj)
+				}
+				obj = null
+			}, 50)
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', actualData)
+			// console.log('dataEventCount=', dataEventCount)
+			clearInterval(Timeout)
+			should(actualData).deepEqual(expectedData)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a file containing many nodes.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/manyItems.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		let objCount = 0
+		let endEventOcurred = false
+
+		parser.on('readable', () => {
+			read()
+		})
+
+		function read() {
+			while (parser.read()) {
+				objCount++
+			}
+			if (!endEventOcurred) {
+				setTimeout(read, 50)
+			}
+		}
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			endEventOcurred = true
+			// console.log(objCount)
+			should(objCount).deepEqual(296)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a huge.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/hugeFile.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		let objCount = 0
+		let endEventOcurred = false
+
+		parser.on('readable', () => {
+			read()
+		})
+
+		function read() {
+			while (parser.read()) {
+				objCount++
+			}
+			if (!endEventOcurred) {
+				setTimeout(read, 50)
+			}
+		}
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			endEventOcurred = true
+			// console.log(objCount);
+			should(objCount).deepEqual(2072)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/same_name.spec.ts

@@ -0,0 +1,111 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+
+describe('nodes with same names', () => {
+	it('should properly parse a simple file containing nodes with same names.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/nodesWithSameNames.xml')
+		const parser = new XmlParser()
+
+		const actualData: string[] = []
+		const actualItems: string[] = []
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			should(err).not.be.ok()
+			done(err)
+		})
+
+		parser.on('item', (item) => {
+			actualItems.push(item)
+		})
+
+		parser.on('end', () => {
+			should(actualItems.length).equal(18)
+			should(dataEventCount).equal(18)
+			done()
+		})
+
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a simple file containing nodes with same names and emit events on multiple nodes.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/nodesWithSameNames.xml')
+		const parser = new XmlParser()
+
+		let dataEventCount = 0
+		let itemEventCount = 0
+		let subitemEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			should(err).not.be.ok()
+			done(err)
+		})
+
+		parser.on('item', (item) => {
+			itemEventCount++
+		})
+
+		parser.on('subitem', (subitem) => {
+			subitemEventCount++
+		})
+
+		parser.on('end', () => {
+			should(itemEventCount).equal(18)
+			should(subitemEventCount).equal(13)
+			should(dataEventCount).equal(31)
+			done()
+		})
+
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a medium size file with same names randomly.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/nodesWithSameNamesRandomly.xml')
+		const parser = new XmlParser()
+
+		let dataEventCount = 0
+		let itemEventCount = 0
+		let subitemEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('item', (item) => {
+			itemEventCount++
+		})
+
+		parser.on('subitem', (subitem) => {
+			subitemEventCount++
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			// console.log('itemEventCount=', itemEventCount)
+			// console.log('subitemEventCount=', subitemEventCount)
+			should(dataEventCount).equal(32)
+			should(itemEventCount).equal(19)
+			should(subitemEventCount).equal(13)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

test/uncompressed.spec.ts

@@ -0,0 +1,64 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+
+describe('should properly handle uncompressed files', () => {
+	it('should properly parse a uncompressed xml file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const gzip = zlib.createGzip()
+		const gunzip = zlib.createGunzip()
+		let dataEventCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(10)
+			done()
+		})
+		xmlStream.pipe(gzip).pipe(gunzip).pipe(parser)
+	})
+
+	it('should properly parse uncompressed file and go fine with pause and resume.', function (done) {
+		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
+		const parser = new XmlParser({ resourcePath: '/items/item' })
+		const gzip = zlib.createGzip()
+		const gunzip = zlib.createGunzip()
+
+		let dataEventCount = 0
+		let isSetTimeoutHappened = true
+		this.timeout(20000)
+		parser.on('data', (data) => {
+			parser.pause()
+			should(isSetTimeoutHappened).equal(true)
+			setTimeout(() => {
+				parser.resume()
+				isSetTimeoutHappened = true
+			}, 2000)
+			dataEventCount++
+			isSetTimeoutHappened = false
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(10)
+			done()
+		})
+		xmlStream.pipe(gzip).pipe(gunzip).pipe(parser)
+	})
+})

test/wrong_resourcepath.spec.ts

@@ -0,0 +1,99 @@
+import fs from 'fs'
+import 'mocha'
+import should from 'should'
+import stream from 'stream'
+import zlib from 'zlib'
+
+import { XmlParser } from '../src/parser'
+
+describe('wrong resourcePath', () => {
+	it('should be able to detect the wrong resourcePath at root level.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
+		const parser = new XmlParser({ resourcePath: '/wrong/noNodes', emitOnNodeName: true })
+
+		const actualData: string[] = []
+		const itemData: string[] = []
+		let dataEventCount = 0
+		let itemCount = 0
+
+		parser.on('data', (data) => {
+			actualData.push(data)
+			dataEventCount++
+		})
+
+		parser.on('item', (item) => {
+			itemData.push(item)
+			itemCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('actualData=', actualData)
+			// console.log('dataEventCount=', dataEventCount)
+			should(actualData.length).equal(0)
+			should(dataEventCount).equal(0)
+			should(itemData.length).equal(0)
+			should(itemCount).equal(0)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should be able to detect wrong resourcePath while parsing xml', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/manyItems.xml')
+		const parser = new XmlParser({ resourcePath: '/wrong/noNodes', emitOnNodeName: true })
+
+		let dataEventCount = 0
+		let itemCount = 0
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('item', (data) => {
+			itemCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(0)
+			should(itemCount).equal(0)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+
+	it('should properly parse a huge file.', (done) => {
+		const xmlStream = fs.createReadStream('./test/TestFiles/hugeFile.xml')
+		const parser = new XmlParser({ resourcePath: '/wrong/path', emitOnNodeName: true })
+
+		let dataEventCount = 0
+		let itemCount = 0
+
+		parser.on('data', (data) => {
+			dataEventCount++
+		})
+
+		parser.on('item', (item) => {
+			itemCount++
+		})
+
+		parser.on('error', (err) => {
+			done(err)
+		})
+
+		parser.on('end', () => {
+			// console.log('dataEventCount=', dataEventCount)
+			should(dataEventCount).equal(0)
+			should(itemCount).equal(0)
+			done()
+		})
+		xmlStream.pipe(parser)
+	})
+})

tsconfig.json

@@ -0,0 +1,46 @@
+{
+    "compilerOptions": {
+        "types": [
+            "node"
+        ],
+        "outDir": "dist",
+        "moduleResolution": "node",
+        "module": "commonjs", 
+        "removeComments": false,
+        "sourceMap": true,
+        "esModuleInterop": true,
+        "allowSyntheticDefaultImports":true,
+        "emitDecoratorMetadata": true,
+        "experimentalDecorators": true,
+        "noImplicitAny": true,
+        "declaration": true,
+        "resolveJsonModule": true,
+        "target":"es2017",
+        "lib": ["es2017"],  
+        "typeRoots": [
+            "./node_modules/@types",
+        ]
+    },
+    "include": [
+        "src/**/*"
+    ],
+    "exclude": [
+        "node_modules",
+        "dist"
+    ],
+    "typedocOptions":{
+        "exclude": ["**/*spec.ts"],
+        "excludeExternals": true,
+        "excludeNotExported": true,
+        "excludePrivate": true,
+        "hideGenerator": true,
+        "includes": "./src",
+        "out": "docs",
+        "module": "commonjs",
+        "stripInternal": true,
+        "mode": "modules",
+        "theme": "default",
+        "moduleResolution": "node",
+        "preserveConstEnums": true
+      }
+}

tslint.json

@@ -0,0 +1,22 @@
+{
+    "rules": {
+        "no-console": [false],
+        "variable-name": false,
+        "radix": false,
+        "object-literal-sort-keys": false,
+        "trailing-comma":[false],
+        "indent": [true,"tabs"],
+        "max-line-length": [false],
+        "no-string-literal": false,
+        "class-name": false,
+        "no-namespace": [false],
+        "no-bitwise": false
+    },
+    "extends": "tslint:recommended",
+    "linterOptions": {
+        "exclude":[
+            "*.json",
+            "**/*.json"
+        ]
+    }
+}