diff --git a/server b/server
index 0515af0..8cad801 160000
--- a/server
+++ b/server
@@ -1 +1 @@
-Subproject commit 0515af012932878cd637bb7b9ee871f263cf4359
+Subproject commit 8cad8011ff9d0c69464f4ce45f4373d58bbdf872
diff --git a/src/index.js b/src/index.js
index 6e79749..3183ac9 100644
--- a/src/index.js
+++ b/src/index.js
@@ -11,4 +11,6 @@ window.app = new Vue({
     components: { App }
 });
 
+window.worker = GetWorker('main');
+
 
diff --git a/src/worker.js b/src/worker.js
index 2663f2f..d90bd96 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -3,9 +3,29 @@
 //
 const name = 'main'
 
+function hexString(buffer) {
+      const byteArray = new Uint8Array(buffer);
+
+      const hexCodes = [...byteArray].map(value => {
+              const hexCode = value.toString(16);
+              const paddedHexCode = hexCode.padStart(2, '0');
+              return paddedHexCode;
+            });
+
+      return hexCodes.join('');
+}
+
 function getSHA256(file){
-    console.log('getting sha 256 for ');
-    console.log(file);
+    const fileName = file.name
+
+    // Read as array buffer
+    fileReader = new FileReaderSync();
+    buffer = fileReader.readAsArrayBuffer(file);
+
+    // Get sha256
+    crypto.subtle.digest('SHA-256', buffer).then( digest => {
+        console.log(`SHA256 for ${fileName}: `, hexString(digest));
+    })
 
 }
 
diff --git a/src/workerInterface.js b/src/workerInterface.js
index 62d2f08..80aee38 100644
--- a/src/workerInterface.js
+++ b/src/workerInterface.js
@@ -3,8 +3,10 @@ class Worker {
     constructor(script) {
         if (window.Worker) {
             this.worker = new window.Worker(script);
-
             this.onmessage = this.worker.onmessage;
+            this.post({
+                msg: 'init'
+            })
         }
     }