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assets/webapps/system.gaiamobile.org/shared/js/gzip/gzip.js

@@ -0,0 +1,39 @@
+/* exported Gzip */
+'use strict';
+
+var Gzip = {
+
+  WORKER_URL: '/shared/js/gzip/gzip_worker.js',
+  compress: function(payload) {
+
+    return new Promise((resolve, reject) => {
+
+      var worker = new Worker(this.WORKER_URL);
+
+      // Protect against the worker failing for whatever reason.
+      var workerTimeout = setTimeout(function() {
+        worker.terminate();
+        reject('Failed to compress: gzip worker did not respond.');
+      }, 10000);
+
+      worker.onmessage = function(msg) {
+        clearTimeout(workerTimeout);
+        worker.terminate();
+
+        var data = msg.data;
+        if (data.returnResult) {
+          resolve(data.gzipData);
+        }
+        else {
+          reject('Failed to compress: ' + data.error);
+        }
+      };
+
+      worker.postMessage({
+        cmd: 'gzip',
+        payload: payload
+      });
+    });
+  }
+};
+