Merge pull request #54 from kchadha/remove-gzip-js

refactor(unzip): remove support for gzip files

lib/unpack.js

@@ -2,7 +2,7 @@ var unzip = require('./unzip');
 
 /**
  * If input a buffer, transforms buffer into a UTF-8 string.
- * If input is encoded in zip or gzip format, the input will be extracted and decoded.
+ * If input is encoded in zip format, the input will be extracted and decoded.
  * If input is a string, passes that string along to the given callback.
  * @param {Buffer | string} input    Project data
  * @param {boolean}         isSprite Whether the input should be treated as
@@ -34,19 +34,17 @@ module.exports = function (input, isSprite, callback) {
     var signature = input.slice(0, 3).join(' ');
     var isLegacy = false;
     var isZip = false;
-    var isGZip = false;
 
     if (signature.indexOf('83 99 114') === 0) isLegacy = true;
     if (signature.indexOf('80 75') === 0) isZip = true;
-    if (signature.indexOf('31 139') === 0) isGZip = true;
 
-    // If not legacy, zip, or gzip, convert buffer to UTF-8 string and return
-    if (!isZip && !isLegacy && !isGZip) {
+    // If not legacy or zip, convert buffer to UTF-8 string and return
+    if (!isZip && !isLegacy) {
         return callback(null, [input.toString('utf-8'), null]);
     }
 
     // Return error if legacy encoding detected
     if (isLegacy) return callback('Parser only supports Scratch 2.X and above');
 
-    unzip(input, isGZip, isSprite, callback);
+    unzip(input, isSprite, callback);
 };

lib/unzip.js

@@ -1,26 +1,16 @@
 var JSZip = require('jszip');
-var GZip = require('gzip-js');
 
 /**
- * Unpacks a zip or gzip file.
- * @param {string} input    Zip file provided as a string
- * @param {boolean} isGZip Whether the input is a GZip file, otherwise treat as zip
+ * Unpacks a zip file.
+ * @param {string}  input    Zip file provided as a string
  * @param {boolean} isSprite Whether the input should be treated as
  * a sprite (true) or whole project (false)
- * @param {array}  callback Array including both the project and zip archive
+ * @param {array}   callback Array including both the project and zip archive
  * @return {void}
  */
-module.exports = function (input, isGZip, isSprite, callback) {
+module.exports = function (input, isSprite, callback) {
     var msg = 'Failed to unzip and extract project.json, with error: ';
-    if (isGZip) {
-        var unpackedProject = null;
-        try {
-            unpackedProject = GZip.unzip(input);
-        } catch (e) {
-            return callback(msg + e);
-        }
-        return callback(null, [(new Buffer(unpackedProject)).toString('utf-8'), null]);
-    }
+
     return JSZip.loadAsync(input)
         .then(function (zip) {
             // look for json in the list of files, or in a subdirectory

package.json

@@ -21,7 +21,6 @@
   },
   "dependencies": {
     "ajv": "6.3.0",
-    "gzip-js": "0.3.2",
     "jszip": "3.1.5",
     "pify": "4.0.1"
   },

test/fixtures/data.js

@@ -11,14 +11,12 @@ var sprite2 = glob.sync(path.resolve(__dirname, './data/*.sprite2'));
 // so that they don't get caught here but can still be used by the
 // validate unit tests
 var json = glob.sync(path.resolve(__dirname, './data/*.json'));
-var gzipJson = glob.sync(path.resolve(__dirname, './data/*.json.gz'));
 
 // Read files and convert to buffers
 for (var a in sb) sb[a] = fs.readFileSync(sb[a]);
 for (var b in sb2) sb2[b] = fs.readFileSync(sb2[b]);
 for (var c in sb3) sb3[c] = fs.readFileSync(sb3[c]);
 for (var d in json) json[d] = fs.readFileSync(json[d]);
-for (var e in gzipJson) gzipJson[e] = fs.readFileSync(gzipJson[e]);
 for (var f in sprite2) sprite2[f] = fs.readFileSync(sprite2[f]);
 
 // Return listings
@@ -26,14 +24,12 @@ module.exports = {
     empty: {
         sb: fs.readFileSync(path.resolve(__dirname, './data/_empty.sb')),
         sb2: fs.readFileSync(path.resolve(__dirname, './data/_empty.sb2')),
-        json: fs.readFileSync(path.resolve(__dirname, './data/_empty.json')),
-        gzipJson: fs.readFileSync(path.resolve(__dirname, './data/_empty.json.gz'))
+        json: fs.readFileSync(path.resolve(__dirname, './data/_empty.json'))
     },
     example: {
         sb: fs.readFileSync(path.resolve(__dirname, './data/_example.sb')),
         sb2: fs.readFileSync(path.resolve(__dirname, './data/_example.sb2')),
         json: fs.readFileSync(path.resolve(__dirname, './data/_example.json')),
-        gzipJson: fs.readFileSync(path.resolve(__dirname, './data/_example.json.gz')),
         invalidEmpty: fs.readFileSync(path.resolve(__dirname, './data/invalid/_invalidEmpty.sb2'))
     },
     sprites: {
@@ -52,7 +48,6 @@ module.exports = {
     sb2: sb2,
     sb3: sb3,
     json: json,
-    gzipJson: gzipJson,
     sprite2: sprite2,
     layerOrderSB3Json: fs.readFileSync(path.resolve(__dirname, './data/_layer_ordering.json')),
     invalidStageLayerSB3Json: fs.readFileSync(path.resolve(__dirname, './data/invalid/_invalid_stage_layer.json')),

test/integration/empty.js

@@ -49,16 +49,3 @@ test('json string', function (t) {
         t.end();
     });
 });
-
-test('gzipped json', function (t) {
-    parser(data.empty.gzipJson, false, function (err, result) {
-        t.equal(err, null);
-        t.equal(Array.isArray(result), true);
-        var res = result[0];
-        var possibleZip = result[1];
-        t.type(res, 'object');
-        t.type(res.info, 'object');
-        t.equal(possibleZip, null);
-        t.end();
-    });
-});

test/integration/example.js

@@ -50,19 +50,6 @@ test('json string', function (t) {
     });
 });
 
-test('gzipped json', function (t) {
-    parser(data.example.gzipJson, false, function (err, result) {
-        t.equal(err, null);
-        t.equal(Array.isArray(result), true);
-        var res = result[0];
-        var possibleZip = result[1];
-        t.type(res, 'object');
-        t.type(res.info, 'object');
-        t.equal(possibleZip, null);
-        t.end();
-    });
-});
-
 test('invalid empty project archive', function (t) {
     var msg = 'Failed to unzip and extract project.json, with error: ';
     parser(data.example.invalidEmpty, false, function (err, result) {

test/unit/unzip.js

@@ -7,7 +7,6 @@ var unzip = require('../../lib/unzip');
 var fixtures = {
     sb: path.resolve(__dirname, '../fixtures/data/_example.sb'),
     sb2: path.resolve(__dirname, '../fixtures/data/_example.sb2'),
-    gzipJSON: path.resolve(__dirname, '../fixtures/data/_example.json.gz'),
     zipFakeProjectJSON:
         path.resolve(__dirname, '../fixtures/data/_zipFakeProjectJson.zip'),
     zipNoProjectJSON:
@@ -28,7 +27,7 @@ test('spec', function (t) {
 
 test('sb', function (t) {
     var buffer = new Buffer(fixtures.sb);
-    unzip(buffer, false, false, function (err, res) {
+    unzip(buffer, false, function (err, res) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(res, 'undefined');
@@ -38,7 +37,7 @@ test('sb', function (t) {
 
 test('sb2', function (t) {
     var buffer = new Buffer(fixtures.sb2);
-    unzip(buffer, false, false, function (err, res) {
+    unzip(buffer, false, function (err, res) {
         t.equal(err, null);
         t.equal(Array.isArray(res), true);
         t.type(res[0], 'string');
@@ -50,23 +49,9 @@ test('sb2', function (t) {
     });
 });
 
-test('gzipped JSON', function (t) {
-    var buffer = new Buffer(fixtures.gzipJSON);
-    unzip(buffer, true, false, function (err, res) {
-        t.equal(err, null);
-        t.equal(Array.isArray(res), true);
-        t.type(res[0], 'string');
-        t.doesNotThrow(function () {
-            JSON.parse(res[0]);
-        });
-        t.equal(res[1], null);
-        t.end();
-    });
-});
-
 test('sb2 with nested folder', function (t) {
     var buffer = new Buffer(fixtures.sb2Nested);
-    unzip(buffer, false, false, function (err, res) {
+    unzip(buffer, false, function (err, res) {
         t.equal(err, null);
         t.equal(Array.isArray(res), true);
         t.type(res[0], 'string');
@@ -80,7 +65,7 @@ test('sb2 with nested folder', function (t) {
 
 test('zip without project json', function (t) {
     var buffer = new Buffer(fixtures.zipNoProjectJSON);
-    unzip(buffer, false, false, function (err, res) {
+    unzip(buffer, false, function (err, res) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(res, 'undefined');
@@ -90,7 +75,7 @@ test('zip without project json', function (t) {
 
 test('zip with fake project json', function (t) {
     var buffer = new Buffer(fixtures.zipFakeProjectJSON);
-    unzip(buffer, false, false, function (err, res) {
+    unzip(buffer, false, function (err, res) {
         t.equal(err, null);
         t.equal(Array.isArray(res), true);
         t.type(res[0], 'string');
@@ -106,7 +91,7 @@ test('zip with fake project json', function (t) {
 var randomString = 'this is not a zip';
 
 test('random string instead of zip, whole project', function (t) {
-    unzip(randomString, false, false, function (err, res) {
+    unzip(randomString, false, function (err, res) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(res, 'undefined');
@@ -115,25 +100,7 @@ test('random string instead of zip, whole project', function (t) {
 });
 
 test('random string instead of zip, sprite', function (t) {
-    unzip(randomString, false, true, function (err, res) {
-        t.type(err, 'string');
-        t.equal(err.startsWith(errorMessage), true);
-        t.type(res, 'undefined');
-        t.end();
-    });
-});
-
-test('random string instead of gzip, whole project ', function (t) {
-    unzip(randomString, true, false, function (err, res) {
-        t.type(err, 'string');
-        t.equal(err.startsWith(errorMessage), true);
-        t.type(res, 'undefined');
-        t.end();
-    });
-});
-
-test('random string instead of gzip, sprite', function (t) {
-    unzip(randomString, true, true, function (err, res) {
+    unzip(randomString, true, function (err, res) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(res, 'undefined');
@@ -143,17 +110,7 @@ test('random string instead of gzip, sprite', function (t) {
 
 test('undefined', function (t) {
     var foo;
-    unzip(foo, false, false, function (err, obj) {
-        t.type(err, 'string');
-        t.equal(err.startsWith(errorMessage), true);
-        t.type(obj, 'undefined');
-        t.end();
-    });
-});
-
-test('undefined isGZip', function (t) {
-    var foo;
-    unzip(foo, true, false, function (err, obj) {
+    unzip(foo, false, function (err, obj) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(obj, 'undefined');
@@ -162,7 +119,7 @@ test('undefined isGZip', function (t) {
 });
 
 test('null instead of zip, whole project', function (t) {
-    unzip(null, false, false, function (err, obj) {
+    unzip(null, false, function (err, obj) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(obj, 'undefined');
@@ -171,25 +128,7 @@ test('null instead of zip, whole project', function (t) {
 });
 
 test('null instead of zip, sprite', function (t) {
-    unzip(null, false, true, function (err, obj) {
-        t.type(err, 'string');
-        t.equal(err.startsWith(errorMessage), true);
-        t.type(obj, 'undefined');
-        t.end();
-    });
-});
-
-test('null instead of gzip, whole project', function (t) {
-    unzip(null, true, false, function (err, obj) {
-        t.type(err, 'string');
-        t.equal(err.startsWith(errorMessage), true);
-        t.type(obj, 'undefined');
-        t.end();
-    });
-});
-
-test('null instead of gzip, sprite', function (t) {
-    unzip(null, true, true, function (err, obj) {
+    unzip(null, true, function (err, obj) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(obj, 'undefined');
@@ -198,7 +137,7 @@ test('null instead of gzip, sprite', function (t) {
 });
 
 test('object instead of zip, whole project', function (t) {
-    unzip({}, false, false, function (err, obj) {
+    unzip({}, false, function (err, obj) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(obj, 'undefined');
@@ -207,25 +146,7 @@ test('object instead of zip, whole project', function (t) {
 });
 
 test('object instead of zip, sprite', function (t) {
-    unzip({}, false, true, function (err, obj) {
-        t.type(err, 'string');
-        t.equal(err.startsWith(errorMessage), true);
-        t.type(obj, 'undefined');
-        t.end();
-    });
-});
-
-test('object instead of gzip, whole project', function (t) {
-    unzip({}, true, false, function (err, obj) {
-        t.type(err, 'string');
-        t.equal(err.startsWith(errorMessage), true);
-        t.type(obj, 'undefined');
-        t.end();
-    });
-});
-
-test('object instead of gzip, sprite', function (t) {
-    unzip({}, true, false, function (err, obj) {
+    unzip({}, true, function (err, obj) {
         t.type(err, 'string');
         t.equal(err.startsWith(errorMessage), true);
         t.type(obj, 'undefined');