Updated script that can be controled by Nodejs web app

node_modules/blob/.npmignore

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+node_modules
+blob.js

node_modules/blob/.zuul.yml

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+ui: mocha-bdd
+browsers:
+  - name: chrome
+    version: 8..latest
+  - name: firefox
+    version: 7..latest
+  - name: safari
+    version: 6..latest
+  - name: opera
+    version: 12.1..latest
+  - name: ie
+    version: 10..latest
+  - name: android
+    version: latest

node_modules/blob/Makefile

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+REPORTER = dot
+
+build: blob.js
+
+blob.js:
+	@./node_modules/.bin/browserify --standalone blob index.js > blob.js
+
+test:
+	@./node_modules/.bin/zuul -- test/index.js
+
+clean:
+	rm blob.js
+
+.PHONY: test blob.js

node_modules/blob/README.md

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+Blob
+====
+
+A module that exports a constructor that uses window.Blob when available, and a BlobBuilder with any vendor prefix in other cases. If neither is available, it exports undefined.
+
+Usage:
+
+```javascript
+var Blob = require('blob');
+var b = new Blob(['hi', 'constructing', 'a', 'blob']);
+```
+
+## Licence
+MIT

node_modules/blob/index.js

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+/**
+ * Create a blob builder even when vendor prefixes exist
+ */
+
+var BlobBuilder = global.BlobBuilder
+  || global.WebKitBlobBuilder
+  || global.MSBlobBuilder
+  || global.MozBlobBuilder;
+
+/**
+ * Check if Blob constructor is supported
+ */
+
+var blobSupported = (function() {
+  try {
+    var a = new Blob(['hi']);
+    return a.size === 2;
+  } catch(e) {
+    return false;
+  }
+})();
+
+/**
+ * Check if Blob constructor supports ArrayBufferViews
+ * Fails in Safari 6, so we need to map to ArrayBuffers there.
+ */
+
+var blobSupportsArrayBufferView = blobSupported && (function() {
+  try {
+    var b = new Blob([new Uint8Array([1,2])]);
+    return b.size === 2;
+  } catch(e) {
+    return false;
+  }
+})();
+
+/**
+ * Check if BlobBuilder is supported
+ */
+
+var blobBuilderSupported = BlobBuilder
+  && BlobBuilder.prototype.append
+  && BlobBuilder.prototype.getBlob;
+
+/**
+ * Helper function that maps ArrayBufferViews to ArrayBuffers
+ * Used by BlobBuilder constructor and old browsers that didn't
+ * support it in the Blob constructor.
+ */
+
+function mapArrayBufferViews(ary) {
+  for (var i = 0; i < ary.length; i++) {
+    var chunk = ary[i];
+    if (chunk.buffer instanceof ArrayBuffer) {
+      var buf = chunk.buffer;
+
+      // if this is a subarray, make a copy so we only
+      // include the subarray region from the underlying buffer
+      if (chunk.byteLength !== buf.byteLength) {
+        var copy = new Uint8Array(chunk.byteLength);
+        copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
+        buf = copy.buffer;
+      }
+
+      ary[i] = buf;
+    }
+  }
+}
+
+function BlobBuilderConstructor(ary, options) {
+  options = options || {};
+
+  var bb = new BlobBuilder();
+  mapArrayBufferViews(ary);
+
+  for (var i = 0; i < ary.length; i++) {
+    bb.append(ary[i]);
+  }
+
+  return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
+};
+
+function BlobConstructor(ary, options) {
+  mapArrayBufferViews(ary);
+  return new Blob(ary, options || {});
+};
+
+module.exports = (function() {
+  if (blobSupported) {
+    return blobSupportsArrayBufferView ? global.Blob : BlobConstructor;
+  } else if (blobBuilderSupported) {
+    return BlobBuilderConstructor;
+  } else {
+    return undefined;
+  }
+})();

node_modules/blob/package.json

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+{
+  "name": "blob",
+  "description": "Abstracts out Blob and uses BlobBulder in cases where it is supported with any vendor prefix.",
+  "version": "0.0.4",
+  "homepage": "https://github.com/rase-/blob",
+  "dependencies": {},
+  "devDependencies": {
+    "mocha": "1.17.1",
+    "expect.js": "0.2.0",
+    "zuul": "1.5.4",
+    "browserify": "3.30.1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:rase-/blob.git"
+  },
+  "scripts": {
+    "test": "make test"
+  }
+}

node_modules/blob/test/index.js

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+var Blob = require('../');
+var expect = require('expect.js');
+
+describe('blob', function() {
+  if (!Blob) {
+    it('should not have a blob or a blob builder in the global namespace, or blob should not be a constructor function if the module exports false', function() {
+      try {
+        var ab = (new Uint8Array(5)).buffer;
+        global.Blob([ab]);
+        expect().fail('Blob shouldn\'t be constructable');
+      } catch (e) {}
+
+      var BlobBuilder = global.BlobBuilder
+        || global.WebKitBlobBuilder
+        || global.MSBlobBuilder
+        || global.MozBlobBuilder;
+      expect(BlobBuilder).to.be(undefined);
+    });
+  } else {
+    it('should encode a proper sized blob when given a string argument', function() {
+      var b = new Blob(['hi']);
+      expect(b.size).to.be(2);
+    });
+
+    it('should encode a blob with proper size when given two strings as arguments', function() {
+      var b = new Blob(['hi', 'hello']);
+      expect(b.size).to.be(7);
+    });
+
+    it('should encode arraybuffers with right content', function(done) {
+      var ary = new Uint8Array(5);
+      for (var i = 0; i < 5; i++) ary[i] = i;
+      var b = new Blob([ary.buffer]);
+      var fr = new FileReader();
+      fr.onload = function() {
+        var newAry = new Uint8Array(this.result);
+        for (var i = 0; i < 5; i++) expect(newAry[i]).to.be(i);
+        done();
+      };
+      fr.readAsArrayBuffer(b);
+    });
+
+    it('should encode typed arrays with right content', function(done) {
+      var ary = new Uint8Array(5);
+      for (var i = 0; i < 5; i++) ary[i] = i;
+      var b = new Blob([ary]);
+      var fr = new FileReader();
+      fr.onload = function() {
+        var newAry = new Uint8Array(this.result);
+        for (var i = 0; i < 5; i++) expect(newAry[i]).to.be(i);
+        done();
+      };
+      fr.readAsArrayBuffer(b);
+    });
+
+    it('should encode sliced typed arrays with right content', function(done) {
+      var ary = new Uint8Array(5);
+      for (var i = 0; i < 5; i++) ary[i] = i;
+      var b = new Blob([ary.subarray(2)]);
+      var fr = new FileReader();
+      fr.onload = function() {
+        var newAry = new Uint8Array(this.result);
+        for (var i = 0; i < 3; i++) expect(newAry[i]).to.be(i + 2);
+        done();
+      };
+      fr.readAsArrayBuffer(b);
+    });
+
+    it('should encode with blobs', function(done) {
+      var ary = new Uint8Array(5);
+      for (var i = 0; i < 5; i++) ary[i] = i;
+      var b = new Blob([new Blob([ary.buffer])]);
+      var fr = new FileReader();
+      fr.onload = function() {
+        var newAry = new Uint8Array(this.result);
+        for (var i = 0; i < 5; i++) expect(newAry[i]).to.be(i);
+        done();
+      };
+      fr.readAsArrayBuffer(b);
+    });
+
+    it('should enode mixed contents to right size', function() {
+      var ary = new Uint8Array(5);
+      for (var i = 0; i < 5; i++) ary[i] = i;
+      var b = new Blob([ary.buffer, 'hello']);
+      expect(b.size).to.be(10);
+    });
+
+    it('should accept mime type', function() {
+      var b = new Blob(['hi', 'hello'], { type: 'text/html' });
+      expect(b.type).to.be('text/html');
+    });
+  }
+});