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diff --git a/node_modules/stream-slice/.npmignore b/node_modules/stream-slice/.npmignore
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+
+node_modules
+*.DS_Store
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diff --git a/node_modules/stream-slice/.travis.yml b/node_modules/stream-slice/.travis.yml
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+language: node_js
+node_js:
+  - "0.10"
+  - "0.11"
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diff --git a/node_modules/stream-slice/README.md b/node_modules/stream-slice/README.md
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+
+stream-slice [![Build Status](https://travis-ci.org/yorkie/stream-slice.svg?branch=master)](https://travis-ci.org/yorkie/koa-range)
+==========================
+slicing stream like buffer/string
+
+### Installation
+
+```sh
+$ npm install stream-slice --save
+```
+
+### Usage
+
+```js
+var fs = require('fs');
+var slice = require('stream-slice').slice;
+fs.createReadStream('your path')
+  .pipe(slice(10, 100))
+  .on('data', function() {
+    // here we only get the buffer from 10th to 100th.
+  });
+```
+
+slicing file
+```js
+var fs = require('fs');
+var slice = require('stream-slice').slice;
+fs.createReadStream('sourc file path')
+  .pipe(slice(0, 200))
+  .pipe(fs.createWriteStream('dest file path'));
+```
+
+### License
+
+MIT
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diff --git a/node_modules/stream-slice/index.js b/node_modules/stream-slice/index.js
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+
+var util = require('util');
+var Transform = require('stream').Transform;
+
+util.inherits(SliceStream, Transform);
+function SliceStream(start, end) {
+
+  if (!(this instanceof SliceStream)) {
+    return new SliceStream();
+  }
+
+  Transform.call(this);
+  this._start = start || 0;
+  this._end = end || Infinity;
+  this._offset = 0;
+  this._state = 0;
+
+  this._emitUp = false;
+  this._emitDown = false;
+}
+
+SliceStream.prototype._transform = function(chunk, encoding, done) {
+  this._offset += chunk.length;
+  if (!this._emitUp && this._offset >= this._start) {
+    this._emitUp = true;
+    var start = chunk.length - (this._offset - this._start);
+    if(this._offset > this._end)
+    {
+        var end = chunk.length - (this._offset - this._end);
+        this._emitDown = true;
+        this.push(chunk.slice(start, end));
+    }
+    else
+    {
+        this.push(chunk.slice(start, chunk.length));
+    }
+    return done();
+  }
+  if (this._emitUp && !this._emitDown) {
+    if (this._offset >= this._end) {
+      this._emitDown = true;
+      this.push(chunk.slice(0, chunk.length - (this._offset - this._end)));
+    } else {
+      this.push(chunk);
+    }
+    return done();
+  }
+  return done();
+}
+
+exports.slice = function(start, end) {
+  return new SliceStream(start, end);
+}
diff --git a/node_modules/stream-slice/package.json b/node_modules/stream-slice/package.json
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+{
+  "name": "stream-slice",
+  "version": "0.1.2",
+  "description": "slice stream like buffer/string",
+  "main": "index.js",
+  "scripts": {
+    "test": "tape test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:yorkie/stream-slice.git"
+  },
+  "keywords": [
+    "slice",
+    "stream"
+  ],
+  "author": "Yorkie Neil <yorkiefixer@gmail.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/yorkie/stream-slice/issues"
+  },
+  "homepage": "https://github.com/yorkie/stream-slice",
+  "devDependencies": {
+    "tape": "^2.13.2"
+  }
+}
diff --git a/node_modules/stream-slice/test.js b/node_modules/stream-slice/test.js
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+++ b/node_modules/stream-slice/test.js
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+
+var test = require('tape');
+var fs = require('fs');
+var slice = require('./index').slice;
+var bufferReady = fs.readFileSync('./README.md');
+
+test('normal test', function(t) {
+  var chunks = [];
+  fs.createReadStream('./README.md')
+    .pipe(slice(0, 10))
+    .on('data', chunks.push.bind(chunks))
+    .on('end', function() {
+      var res = Buffer.concat(chunks);
+      t.equal(res.length, 10);
+      t.equal(bufferEq(res, bufferReady.slice(0, 10)), true);
+      t.end();
+    });
+});
+
+test('normal test', function(t) {
+  var chunks = [];
+  fs.createReadStream('./README.md')
+    .pipe(slice(10, 20))
+    .on('data', chunks.push.bind(chunks))
+    .on('end', function() {
+      var res = Buffer.concat(chunks);
+      t.equal(res.length, 10);
+      t.equal(bufferEq(res, bufferReady.slice(10, 20)), true);
+      t.end();
+    });
+});
+
+function bufferEq(foo, bar) {
+  if (!Buffer.isBuffer(foo) || !Buffer.isBuffer(bar)) {
+    throw new TypeError('Arguments must be a buffer');
+  }
+  if (foo.length !== bar.length) {
+    return false;
+  }
+  for (var i = 0; i < foo.length; i++) {
+    if (foo[i] !== bar[i]) {
+      return false;
+    }
+  }
+  return true;
+}
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