org.activiti.rest.api.identity.UserPictureResource.java Source code

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Here is the source code for org.activiti.rest.api.identity.UserPictureResource.java

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/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.rest.api.identity;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;

import org.activiti.engine.ActivitiException;
import org.activiti.engine.ActivitiIllegalArgumentException;
import org.activiti.engine.ActivitiObjectNotFoundException;
import org.activiti.engine.identity.Picture;
import org.activiti.engine.identity.User;
import org.activiti.rest.api.ActivitiUtil;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.io.IOUtils;
import org.restlet.data.MediaType;
import org.restlet.data.Status;
import org.restlet.ext.fileupload.RestletFileUpload;
import org.restlet.representation.InputRepresentation;
import org.restlet.representation.Representation;
import org.restlet.resource.Get;
import org.restlet.resource.Put;
import org.restlet.resource.ResourceException;

/**
 * @author Frederik Heremans
 */
public class UserPictureResource extends BaseUserResource {

    @Get
    public InputRepresentation getUserPicture() {
        if (!authenticate())
            return null;

        User user = getUserFromRequest();
        Picture userPicture = ActivitiUtil.getIdentityService().getUserPicture(user.getId());

        if (userPicture == null) {
            throw new ActivitiObjectNotFoundException(
                    "The user with id '" + user.getId() + "' does not have a picture.", Picture.class);
        }

        MediaType mediaType = MediaType.IMAGE_JPEG;
        if (userPicture.getMimeType() != null) {
            mediaType = MediaType.valueOf(userPicture.getMimeType());
        }

        return new InputRepresentation(userPicture.getInputStream(), mediaType);
    }

    @Put
    public void updateUserPicture(Representation representation) {
        User user = getUserFromRequest();

        if (!MediaType.MULTIPART_FORM_DATA.isCompatible(representation.getMediaType())) {
            throw new ResourceException(Status.CLIENT_ERROR_UNSUPPORTED_MEDIA_TYPE.getCode(),
                    "The request should be of type 'multipart/form-data'.", null, null);
        }

        RestletFileUpload upload = new RestletFileUpload(new DiskFileItemFactory());
        try {
            FileItem uploadItem = null;
            List<FileItem> items = upload.parseRepresentation(representation);
            String mimeType = MediaType.IMAGE_JPEG.toString();

            for (FileItem fileItem : items) {
                if (fileItem.isFormField()) {
                    if ("mimeType".equals(fileItem.getFieldName())) {
                        mimeType = fileItem.getString("UTF-8");
                    }
                } else if (fileItem.getName() != null) {
                    uploadItem = fileItem;
                }
            }

            if (uploadItem == null) {
                throw new ActivitiIllegalArgumentException("No file content was found in request body.");
            }

            int size = ((Long) uploadItem.getSize()).intValue();

            // Copy file-body in a bytearray as the engine requires this
            ByteArrayOutputStream bytesOutput = new ByteArrayOutputStream(size);
            IOUtils.copy(uploadItem.getInputStream(), bytesOutput);

            Picture newPicture = new Picture(bytesOutput.toByteArray(), mimeType);
            ActivitiUtil.getIdentityService().setUserPicture(user.getId(), newPicture);

        } catch (FileUploadException e) {
            throw new ActivitiException("Error with uploaded file: " + e.getMessage(), e);
        } catch (IOException e) {
            throw new ActivitiException("Error while reading uploaded file: " + e.getMessage(), e);
        }
    }
}