org.magnum.dataup.VideoUpController.java Source code

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Here is the source code for org.magnum.dataup.VideoUpController.java

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/*
 * 
 * Copyright 2014 Jules White
 *
 * 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.magnum.dataup;

import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.magnum.dataup.model.Video;
import org.magnum.dataup.model.VideoStatus;
import org.magnum.dataup.model.VideoStatus.VideoState;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
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.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class VideoUpController {
    private Map<Long, Video> videos = new HashMap<Long, Video>();
    private static final AtomicLong currentId = new AtomicLong(0L);
    private VideoFileManager videoDataMgr;

    public VideoUpController() throws IOException {
        videoDataMgr = VideoFileManager.get();
    }

    @RequestMapping(value = VideoSvcApi.VIDEO_SVC_PATH, method = RequestMethod.GET)
    public @ResponseBody Collection<Video> getVideoList() {
        return videos.values();
    }

    @RequestMapping(value = VideoSvcApi.VIDEO_SVC_PATH, method = RequestMethod.POST)
    public @ResponseBody Video addVideo(@RequestBody Video v) {
        checkAndSetId(v);
        String dataUrl = getDataUrl(v.getId());
        v.setDataUrl(dataUrl);
        videos.put(v.getId(), v);
        return v;
    }

    private void checkAndSetId(Video v) {
        if (v.getId() == 0) {
            v.setId(currentId.incrementAndGet());
        }
    }

    private String getDataUrl(long videoId) {
        String url = getUrlBaseForLocalServer() + "/video/" + videoId + "/data";
        return url;
    }

    private String getUrlBaseForLocalServer() {
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes())
                .getRequest();
        String base = "http://" + request.getServerName()
                + ((request.getServerPort() != 80) ? ":" + request.getServerPort() : "");
        return base;
    }

    @RequestMapping(value = VideoSvcApi.VIDEO_DATA_PATH, method = RequestMethod.POST)
    public @ResponseBody VideoStatus setVideoData(@PathVariable(VideoSvcApi.ID_PARAMETER) long id,
            @RequestParam(VideoSvcApi.DATA_PARAMETER) MultipartFile videoData, HttpServletResponse resp) {
        if (videos.containsKey(id)) {
            Video v = videos.get(id);
            try {
                saveVideo(v, videoData);
                return new VideoStatus(VideoState.READY);
            } catch (IOException e) {
                resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            }
        } else {
            resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
        }
        return null;
    }

    private void saveVideo(Video v, MultipartFile videoData) throws IOException {
        videoDataMgr.saveVideoData(v, videoData.getInputStream());
    }

    @RequestMapping(value = VideoSvcApi.VIDEO_DATA_PATH, method = RequestMethod.GET)
    public void getData(@PathVariable(VideoSvcApi.ID_PARAMETER) long id, HttpServletResponse resp) {
        if (videos.containsKey(id)) {
            try {
                serveVideo(videos.get(id), resp);
                resp.setStatus(HttpServletResponse.SC_OK);
                resp.setHeader("Content-Type", "video/mpeg");
            } catch (IOException e) {
                resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            }
        } else {
            resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
        }
    }

    private void serveVideo(Video v, HttpServletResponse resp) throws IOException {
        videoDataMgr.copyVideoData(v, resp.getOutputStream());
    }
}