Keep a reference to the file we are uploading to keep IE10 happy (#18372)

Change-Id: I2dc9b846e1c3ae123b26eac017082bea4ba6f7c3

client/src/com/vaadin/client/ui/VDragAndDropWrapper.java

@@ -472,6 +472,9 @@ public class VDragAndDropWrapper extends VCustomComponent implements
         /*-{
 
             this.setRequestHeader('Content-Type', 'multipart/form-data');
+            // Seems like IE10 will loose the file if we don't keep a reference to it...
+            this.fileBeingUploaded = file;
+
             this.send(file);
         }-*/;
 

uitest/src/com/vaadin/tests/components/upload/DragAndDropUploadAndInteractions.java

@@ -0,0 +1,153 @@
+package com.vaadin.tests.components.upload;
+
+import java.io.OutputStream;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.List;
+
+import org.apache.commons.io.output.ByteArrayOutputStream;
+
+import com.vaadin.event.dd.DragAndDropEvent;
+import com.vaadin.event.dd.DropHandler;
+import com.vaadin.event.dd.acceptcriteria.AcceptAll;
+import com.vaadin.event.dd.acceptcriteria.AcceptCriterion;
+import com.vaadin.server.StreamVariable;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUIWithLog;
+import com.vaadin.ui.Button;
+import com.vaadin.ui.ComboBox;
+import com.vaadin.ui.Component;
+import com.vaadin.ui.DragAndDropWrapper;
+import com.vaadin.ui.Html5File;
+import com.vaadin.ui.Panel;
+
+public class DragAndDropUploadAndInteractions extends AbstractTestUIWithLog {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        ComboBox comboBox = new ComboBox();
+        for (int i = 0; i < 10; i++) {
+            comboBox.addItem("Test " + i);
+        }
+        addComponent(comboBox);
+        Button b = new Button("Dummy");
+        addComponent(b);
+        Panel p = new Panel();
+        p.setHeight(200, Unit.PIXELS);
+        p.setWidth(200, Unit.PIXELS);
+        MyUploadPanel myUploadPanel = new MyUploadPanel(p);
+        addComponent(myUploadPanel);
+    }
+
+    class MyUploadPanel extends DragAndDropWrapper implements DropHandler {
+        private static final long serialVersionUID = 1L;
+
+        public MyUploadPanel(Component root) {
+            super(root);
+            setDropHandler(this);
+        }
+
+        @Override
+        public void drop(DragAndDropEvent event) {
+            WrapperTransferable tr = (WrapperTransferable) event
+                    .getTransferable();
+            Html5File[] files = tr.getFiles();
+
+            if (files != null) {
+                List<Html5File> filesToUpload = Arrays.asList(files);
+                for (Html5File file : filesToUpload) {
+                    file.setStreamVariable(new MyStreamVariable());
+                }
+            }
+        }
+
+        @Override
+        public AcceptCriterion getAcceptCriterion() {
+            return AcceptAll.get();
+        }
+
+    }
+
+    class MyStreamVariable implements StreamVariable {
+        private static final long serialVersionUID = 1L;
+
+        @Override
+        public OutputStream getOutputStream() {
+            return new ByteArrayOutputStream();
+        }
+
+        @Override
+        public boolean listenProgress() {
+            return true;
+        }
+
+        long lastEvent = 0;
+        long lastTime = 0;
+
+        @Override
+        public void onProgress(StreamingProgressEvent event) {
+            long received = event.getBytesReceived() - lastEvent;
+            long now = new Date().getTime();
+            long time = now - lastTime;
+            lastTime = now;
+            lastEvent = event.getBytesReceived();
+            if (time == 0) {
+                return;
+            }
+            log("Received " + received + " bytes in " + time + "ms: "
+                    + formatSize(received / (time / 1000.0)) + "/s");
+            log("Streaming OnProgress - ContentLength: "
+                    + formatSize(event.getContentLength())
+                    + " - Bytes Received: "
+                    + formatSize(event.getBytesReceived()));
+        }
+
+        @Override
+        public void streamingStarted(StreamingStartEvent event) {
+            lastEvent = 0;
+            lastTime = new Date().getTime();
+            log("Streaming Started - ContentLength: "
+                    + formatSize(event.getContentLength())
+                    + " - Bytes Received: "
+                    + formatSize(event.getBytesReceived()));
+        }
+
+        @Override
+        public void streamingFinished(StreamingEndEvent event) {
+            log("Streaming Finished - ContentLength: "
+                    + formatSize(event.getContentLength())
+                    + " - Bytes Received: "
+                    + formatSize(event.getBytesReceived()));
+        }
+
+        @Override
+        public void streamingFailed(StreamingErrorEvent event) {
+            log("Streaming Failed - ContentLength: "
+                    + formatSize(event.getContentLength())
+                    + " - Bytes Received: "
+                    + formatSize(event.getBytesReceived()));
+        }
+
+        @Override
+        public boolean isInterrupted() {
+            return false;
+        }
+
+    }
+
+    protected String formatSize(double contentLength) {
+        double d = contentLength;
+        int suffix = 0;
+        String[] suffixes = new String[] { "B", "KB", "MB", "GB", "TB" };
+        while (d > 1024) {
+            suffix++;
+            d /= 1024.0;
+        }
+        return String.format("%.1f %s", d, suffixes[suffix]);
+    }
+
+    @Override
+    protected String getTestDescription() {
+        return "Drop a large (100 MB) file using IE10 and interact with the application while uploading. Ensure the uploads succeeds even though you are interacting with the app.";
+    }
+}