FileUploadController.java

/*
 * Copyright 2010-2014 the original author or authors.
 *
 * 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 showcase;

import java.io.IOException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

/**
 * Handles requests for the application file upload page.
 * 
 * @author Roy Clarkson
 */
@Controller
public class FileUploadController {

	private static final Logger logger = LoggerFactory.getLogger(FileUploadController.class);

	/**
	 * Simply selects the view to render by returning its name.
	 */
	@RequestMapping(value = "fileupload", method = RequestMethod.GET)
	public String fileUpload() {
		return "fileupload";
	}

	/**
	 * Accepts a POST request with multipart/form-data content
	 * @param name the name of the file being uploaded
	 * @param file the binary file
	 * @return response message indicating success or failure
	 */
	@RequestMapping(value = "postformdata", method = RequestMethod.POST, headers = "Content-Type=multipart/form-data")
	public @ResponseBody String handleFormUpload(@RequestParam("description") String description,
			@RequestParam("file") MultipartFile file) {

		if (!file.isEmpty()) {
			byte[] bytes = null;
			try {
				bytes = file.getBytes();
			} catch (IOException e) {
				logger.info("error processing uploaded file", e);
			}
			return "file upload received! Name:[" + description + "] Size:["
					+ bytes.length + "]";
		} else {
			return "file upload failed!";
		}
	}

}