UD-806 Allow to drag and drop local files to the Che instance

Change-Id: I18d33c9f9abb3ee5c70504a14e36a39a1056a224
Signed-off-by: Florent BENOIT <fbenoit@codenvy.com>

che-admin-war/src/main/java/org/eclipse/che/admin/deploy/ApiServletModule.java

@@ -12,6 +12,7 @@
 
 import com.google.inject.servlet.ServletModule;
 
+import org.eclipse.che.admin.upload.UploadServlet;
 import org.eclipse.che.inject.DynaModule;
 import org.everrest.guice.servlet.GuiceEverrestServlet;
 
@@ -23,6 +24,7 @@
 public class ApiServletModule extends ServletModule {
     @Override
     protected void configureServlets() {
+        serve("/upload").with(UploadServlet.class);
         serve("/*", new String[0]).with(GuiceEverrestServlet.class);
     }
 }

che-admin-war/src/main/java/org/eclipse/che/admin/deploy/Constants.java

@@ -0,0 +1,23 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2015 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.admin.deploy;
+
+/**
+ * Constants that might be defined in che.properties file.
+ * @author Florent Benoit
+ */
+public class Constants {
+
+    /**
+     * Constant used to describe the path to the servlet upload directory when uploading files.
+     */
+    public static final String CHE_SERVLET_UPLOAD_DIRECTORY = "che.servlet.upload.directory";
+}

che-admin-war/src/main/java/org/eclipse/che/admin/upload/UploadServlet.java

@@ -0,0 +1,79 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2015 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.admin.upload;
+
+import org.eclipse.che.admin.deploy.Constants;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+import javax.inject.Singleton;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.MultipartConfig;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+/**
+ * Upload servlet allowing to upload files to the server. Request should contain a part named 'uploadedFile' for the file.
+ * @author Florent Benoit
+ */
+@MultipartConfig
+@Singleton
+public class UploadServlet extends HttpServlet {
+
+    /**
+     * Serializable class;
+     */
+    private static final long serialVersionUID = -687991492884005033L;
+
+    /**
+     * Folder used to store uploaded files.
+     */
+    private String uploadFolder;
+
+    /**
+     * Create a new upload folder.
+     * @param uploadFolder the path to store the uploaded files.
+     */
+    @Inject
+    public UploadServlet(@Named(Constants.CHE_SERVLET_UPLOAD_DIRECTORY) String uploadFolder) {
+        this.uploadFolder = uploadFolder;
+    }
+
+    /**
+     * Handle the POST request only by allowing to upload files.
+     * @param request the request with a part named 'uploadedFile'
+     * @param response empty if file is uploaded
+     * @throws ServletException if there is a problem while uploading
+     * @throws IOException if there is a problem while uploading
+     */
+    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        request.getParts().stream().forEach((filePart -> {
+            try {
+                String fileName = filePart.getSubmittedFileName();
+                InputStream inputStream = filePart.getInputStream();
+                Path path = Paths.get(uploadFolder).resolve(fileName);
+                Files.createDirectories(path.getParent());
+                Files.copy(inputStream, path);
+
+            } catch (IOException e) {
+                throw new RuntimeException("Unable to upload files", e);
+            }
+        }));
+    }
+
+
+}

che-admin-war/src/main/webapp/META-INF/context.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Copyright (c) 2012-2015 Codenvy, S.A.
+    All rights reserved. This program and the accompanying materials
+    are made available under the terms of the Eclipse Public License v1.0
+    which accompanies this distribution, and is available at
+    http://www.eclipse.org/legal/epl-v10.html
+
+    Contributors:
+      Codenvy, S.A. - initial API and implementation
+
+-->
+<Context allowCasualMultipartParsing="true" />

che-admin-war/src/main/webapp/WEB-INF/classes/che/che.properties

@@ -0,0 +1,13 @@
+#
+# Copyright (c) 2012-2015 Codenvy, S.A.
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Eclipse Public License v1.0
+# which accompanies this distribution, and is available at
+# http://www.eclipse.org/legal/epl-v10.html
+#
+# Contributors:
+#   Codenvy, S.A. - initial API and implementation
+#
+
+# Directory used to upload files
+che.servlet.upload.directory=${catalina.base}/temp/upload

examples/my-multi-extension/my-action/src/main/resources/tutorial/MyExtension.gwt.xml

@@ -0,0 +1,18 @@
+<!--
+
+    Copyright (c) 2012-2015 Codenvy, S.A.
+    All rights reserved. This program and the accompanying materials
+    are made available under the terms of the Eclipse Public License v1.0
+    which accompanies this distribution, and is available at
+    http://www.eclipse.org/legal/epl-v10.html
+
+    Contributors:
+      Codenvy, S.A. - initial API and implementation
+
+-->
+<module>
+    <inherits name="com.google.gwt.user.User"/>
+    <inherits name="org.eclipse.che.ide.Api"/>
+    <inherits name="com.google.gwt.inject.Inject"/>
+    <source path=""/>
+</module>

examples/my-project-type/src/main/resources/tutorial/MyExtension.gwt.xml

@@ -0,0 +1,18 @@
+<!--
+
+    Copyright (c) 2012-2015 Codenvy, S.A.
+    All rights reserved. This program and the accompanying materials
+    are made available under the terms of the Eclipse Public License v1.0
+    which accompanies this distribution, and is available at
+    http://www.eclipse.org/legal/epl-v10.html
+
+    Contributors:
+      Codenvy, S.A. - initial API and implementation
+
+-->
+<module>
+    <inherits name="com.google.gwt.user.User"/>
+    <inherits name="org.eclipse.che.ide.Api"/>
+    <inherits name="com.google.gwt.inject.Inject"/>
+    <source path=""/>
+</module>

plugin-tools/che-api-plugin/src/main/java/org/eclipse/che/plugin/CustomExceptionMapper.java

@@ -34,24 +34,41 @@ public class CustomExceptionMapper implements ExceptionMapper<PluginException> {
     @Override
     public Response toResponse(PluginException exception) {
 
+        // try to get the inner cause
+        Throwable innerException = getInnerCause(exception);
+        String message = exception.getMessage() + ": " + innerException.getClass().getSimpleName() + " " + innerException.getMessage();
+
         if (exception instanceof PluginManagerNotFoundException || exception instanceof PluginInstallerNotFoundException || exception instanceof PluginResolverNotFoundException) {
             return Response.status(Response.Status.NOT_FOUND)
                            .entity(DtoFactory.getInstance()
                                              .toJson(DtoFactory.getInstance().createDto(ServiceError.class)
-                                                               .withMessage(exception.getMessage())))
+                                                               .withMessage(message)))
                            .type(MediaType.APPLICATION_JSON)
                            .build();
         } else if (exception instanceof PluginManagerAlreadyExistsException) {
             return Response.status(Response.Status.CONFLICT)
                            .entity(DtoFactory.getInstance()
                                              .toJson(DtoFactory.getInstance().createDto(ServiceError.class)
-                                                               .withMessage(exception.getMessage())))
+                                                               .withMessage(message)))
                            .type(MediaType.APPLICATION_JSON)
                            .build();
         }
         return Response.serverError()
-                       .entity(DtoFactory.getInstance().createDto(ServiceError.class).withMessage(exception.getMessage()))
+                       .entity(DtoFactory.getInstance().createDto(ServiceError.class).withMessage(message))
                        .type(MediaType.APPLICATION_JSON)
                        .build();
     }
+
+    /**
+     * Gets the inner cause or return current exception if there is no root cause
+     * @param throwable iterate over this throwable
+     * @return current or the deepest inner cause
+     */
+    protected Throwable getInnerCause(Throwable throwable) {
+        if (throwable.getCause() == null) {
+            return throwable;
+        }
+        return getInnerCause(throwable.getCause());
+    }
+
 }

plugin-tools/che-api-plugin/src/main/java/org/eclipse/che/plugin/PluginGuiceModule.java

@@ -23,6 +23,7 @@
 import org.eclipse.che.plugin.internal.installer.PluginInstallerImpl;
 import org.eclipse.che.plugin.internal.manager.PluginManagerImpl;
 import org.eclipse.che.plugin.internal.repository.PluginRepositoryImpl;
+import org.eclipse.che.plugin.internal.resolver.LocalUploadResolver;
 import org.eclipse.che.plugin.internal.resolver.MavenResolver;
 
 /**
@@ -44,6 +45,8 @@ protected void configure() {
 
         Multibinder<PluginResolver> pluginDownloaderMultibinder = Multibinder.newSetBinder(binder(), PluginResolver.class);
         pluginDownloaderMultibinder.addBinding().to(MavenResolver.class);
+        pluginDownloaderMultibinder.addBinding().to(LocalUploadResolver.class);
+
 
     }
 }

plugin-tools/che-api-plugin/src/main/java/org/eclipse/che/plugin/internal/api/PluginManager.java

@@ -22,7 +22,7 @@ public interface PluginManager {
      */
     List<IPlugin> listPlugins() throws PluginRepositoryException;
 
-    IPlugin addPlugin(String mavenPluginRef) throws PluginManagerException, PluginResolverNotFoundException;
+    IPlugin addPlugin(String mavenPluginRef) throws PluginManagerException, PluginResolverNotFoundException, PluginResolverNotFoundException;
 
 
     IPlugin getPluginDetails(String pluginName) throws PluginManagerNotFoundException;

plugin-tools/che-api-plugin/src/main/java/org/eclipse/che/plugin/internal/api/PluginResolverNotFoundException.java

@@ -11,12 +11,26 @@
 package org.eclipse.che.plugin.internal.api;
 
 /**
+ * Exception if plugin is not found during the resolution of the url
  * @author Florent Benoit
  */
 public class PluginResolverNotFoundException extends PluginException {
 
-    public PluginResolverNotFoundException(String s, Throwable e) {
-        super(s, e);
+    /**
+     * Create exception with a given message.
+     * @param message the error message
+     */
+    public PluginResolverNotFoundException(String message) {
+        super(message);
+    }
+
+    /**
+     * Create exception with a given message and a root cause.
+     * @param message the error message
+     *                @param e the root cause
+     */
+    public PluginResolverNotFoundException(String message, Throwable e) {
+        super(message, e);
     }
 
 }

plugin-tools/che-api-plugin/src/main/java/org/eclipse/che/plugin/internal/manager/PluginManagerImpl.java

@@ -251,7 +251,7 @@ public void onFailure(Throwable throwable) {
     }
 
 
-    public IPlugin addPlugin(final String pluginRef) throws PluginResolverNotFoundException, PluginManagerException {
+    public IPlugin addPlugin(final String pluginRef) throws PluginResolverNotFoundException, PluginManagerException, PluginResolverNotFoundException {
 
 
         // resolve plugin

plugin-tools/che-api-plugin/src/main/java/org/eclipse/che/plugin/internal/repository/PluginRepositoryImpl.java

@@ -226,7 +226,7 @@ public Path add(Path localPlugin) throws PluginRepositoryException {
         try {
             Files.move(localPlugin, destPath);
         } catch (IOException e) {
-            throw new PluginRepositoryException("Unable to move plugin to staged directory");
+            throw new PluginRepositoryException("Unable to move plugin to staged directory", e);
         }
 
         return destPath;
@@ -249,7 +249,7 @@ public Path stageInstall(Path availablePlugin) throws PluginRepositoryException
         try {
             Files.move(availablePlugin, newLocation);
         } catch (IOException e) {
-            throw new PluginRepositoryException("Unable to move plugin to staged directory");
+            throw new PluginRepositoryException("Unable to move plugin to staged directory", e);
         }
 
 
@@ -273,7 +273,7 @@ public Path undoStageInstall(Path stagedInstallPlugin) throws PluginRepositoryEx
         try {
             Files.move(stagedInstallPlugin, newLocation);
         } catch (IOException e) {
-            throw new PluginRepositoryException("Unable to move plugin to staged directory");
+            throw new PluginRepositoryException("Unable to move plugin to staged directory", e);
         }
 
 
@@ -296,7 +296,7 @@ public Path undoStageUninstall(Path stagedUninstallPlugin) throws PluginReposito
         try {
             Files.move(stagedUninstallPlugin, newLocation);
         } catch (IOException e) {
-            throw new PluginRepositoryException("Unable to move plugin to staged directory");
+            throw new PluginRepositoryException("Unable to move plugin to staged directory", e);
         }
 
 
@@ -320,7 +320,7 @@ public Path stageUninstall(Path installedPlugin) throws PluginRepositoryExceptio
         try {
             Files.move(installedPlugin, newLocation);
         } catch (IOException e) {
-            throw new PluginRepositoryException("Unable to move plugin to available directory");
+            throw new PluginRepositoryException("Unable to move plugin to available directory", e);
         }