手写一个抖音视频去水印工具，千万别刚一个程序员

https://v.douyin.com/JSkuhE4/

https://www.iesdouyin.com/share/video/6820792802394262795/

https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?item_ids=6820792802394262795

https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0200f030000bqk54kg2saj3lso3oh20&ratio=720p&line=0

https://aweme.snssdk.com/aweme/v1/play/?video_id=v0200f030000bqk54kg2saj3lso3oh20&ratio=720p&line=0

/**
* @param url
* @author xiaofu
* @description 获取当前链接重定向后的url
* @date 2020/9/15 12:43
*/
public static String getLocation(String url) {
        try {
            URL serverUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) serverUrl.openConnection();
            conn.setRequestMethod("GET");
            conn.setInstanceFollowRedirects(false);
            conn.setRequestProperty("User-agent", "ua");//模拟手机连接
            conn.connect();
            String location = conn.getHeaderField("Location");
            return location;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }

/**
 * @author xiaofu-公众号：程序员内点事
 * @description 抖音无水印视频下载
 * @date 2020/9/15 18:44
 */
@Slf4j
@Controller
public class DYController {
    public static String DOU_YIN_BASE_URL = "https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?item_ids=";
    /**
     * @param url
     * @author xiaofu
     * @description 解析抖音无水印视频
     * @date 2020/9/15 12:43
     */
    @RequestMapping("/parseVideoUrl")
    @ResponseBody
    public String parseVideoUrl(@RequestBody String url) throws Exception {
        DYDto dyDto = new DYDto();
        try {
            url = URLDecoder.decode(url).replace("url=", "");
            /**
             * 1、短连接重定向后的 URL
             */
            String redirectUrl = CommonUtils.getLocation(url);
            /**
             * 2、拿到视频对应的 ItemId
             */
            String videoUrl = "";
            String musicUrl = "";
            String videoPic = "";
            String desc = "";
            if (!StringUtils.isEmpty(redirectUrl)) {
                /**
                 * 3、用 ItemId 拿视频的详细信息，包括无水印视频url
                 */
                String itemId = CommonUtils.matchNo(redirectUrl);
                StringBuilder sb = new StringBuilder();
                sb.append(DOU_YIN_BASE_URL).append(itemId);
                String videoResult = CommonUtils.httpGet(sb.toString());
                DYResult dyResult = JSON.parseObject(videoResult, DYResult.class);
                /**
                 * 4、无水印视频 url
                 */
                videoUrl = dyResult.getItem_list().get(0)
                        .getVideo().getPlay_addr().getUrl_list().get(0)
                        .replace("playwm", "play");
                String videoRedirectUrl = CommonUtils.getLocation(videoUrl);
                dyDto.setVideoUrl(videoRedirectUrl);
                /**
                 * 5、音频 url
                 */
                musicUrl = dyResult.getItem_list().get(0).getMusic().getPlay_url().getUri();
                dyDto.setMusicUrl(musicUrl);
                /**
                 * 6、封面
                 */
                videoPic = dyResult.getItem_list().get(0).getVideo().getDynamic_cover().getUrl_list().get(0);
                dyDto.setVideoPic(videoPic);
                /**
                 * 7、视频文案
                 */
                desc = dyResult.getItem_list().get(0).getDesc();
                dyDto.setDesc(desc);
            }
        } catch (Exception e) {
            log.error("去水印异常 {}", e);
        }
        return JSON.toJSONString(dyDto);
    }
}

$.ajax({
    url: '/parseVideoUrl',
    type: 'POST',
    data: {"url": link},
    success: function (data) {
        $('.qsy-submit').attr('disabled', false);
        try {
            var rows = JSON.parse(data);
            layer.close(index);
            layer.open({
                type: 1,
                title: false,
                closeBtn: 1,
                shadeClose: true,
                skin: 'yourclass',
                content: `<div style="overflow:hidden;height: 580px;width: 350px;"><div><div class="popButton"><a href="###" rel="noopener nofollow noreferrer" onclick="downloadVideo('${rows['videoUrl']}','${rows['desc']}')"><button class="layui-bg-red layui-btn-sm layui-btn">下载视频</button></a></div><div class="popButton"><textarea id="videourl" cols="1" rows="1" style="height:0;width:0;position: absolute;">${rows['videoUrl']}</textarea><button class="layui-btn-sm layui-bg-blue layui-btn" onclick="copy('videourl')">复制链接</button></div><div class="popButton"><a href="###" rel="noopener nofollow noreferrer" onclick="downloadVideo('${rows['musicUrl']}','${rows['desc']}')"><button class="layui-btn-sm layui-btn">下载音频</button></a></div><video id="video" width="360px" height="500px" src="${rows['videoUrl']}" controls = "true" poster="${rows['videoPic']}" preload="auto" webkit-playsinline="true" playsinline="true" x-webkit-airplay="allow" x5-video-player-type="h5" x5-video-player-fullscreen="true" x5-video-orientation="portraint" style="object-fit:fill"><source src="${rows['videoUrl']}" type="video/mp4"> </video></div></div>`
                //content: `<video id="video" src="${rows['videoUrl']}" controls = "true" poster="${rows['videoPic']}" preload="auto" webkit-playsinline="true" playsinline="true" x-webkit-airplay="allow" x5-video-player-type="h5" x5-video-player-fullscreen="true" x5-video-orientation="portraint" style="object-fit:fill"><source src="${rows['videoUrl']}" type="video/mp4"> </video>`
            });
        } catch (error) {
            layer.alert('错误信息:' + error, {
                title: '异常',
                skin: 'layui-layer-lan',
                closeBtn: 0,
                anim: 4 //动画类型
            });
            return false;
        }
    },
    error: function (err) {
        console.log(err);
        layer.close(index);
        $('.qsy-submit').attr('disabled', false);
    },
    done: function () {
        layer.close(index);
    }
})
})

 <!-- 解决访问视频url 请求403异常 -->
 <meta name="referrer" content="no-referrer"/>