Java实现超简单抖音去水印的示例详解_Java教程

一、前言

抖音去水印方法很简单，以前一直没有去研究，以为搞个去水印还要用到算法去除，直到动手的时候才发现这么简单，不用编程基础都能做。

二、原理与步骤

其实抖音它是有一个隐藏无水印地址的，只要我们找到那个地址就可以了

1、我们在抖音找一个想要去水印的视频链接

注意：这里一定要是https开头的，不是口令

打开浏览器访问：

Java实现超简单抖音去水印的示例详解

访问之后会重定向到这个地址，后面有一串数字，这个就是视频的id，他是根据这个唯一id来找到视频播放的

Java实现超简单抖音去水印的示例详解

按F12查看网络请求，找到刚刚复制的那个请求地址，在响应头里有一个location链接，访问location的链接

https://www.iesdouyin.com/share/video/7064781119429807363/

在F12中有许多请求，查看众多的请求里有一个请求是：

请求太多没找到可以直接跳过，直接看：https://aweme.snssdk.com 这个就行了，把id替换一下

https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?item_ids=7064781119429807363

把这个请求再次用浏览器访问，然后返回了一大串json数据，一直放下翻可以找到这个链接

https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0200fg10000c85i9ejc77ue0kb2vo80&ratio=720p&line=0

Java实现超简单抖音去水印的示例详解

直接用那个链接访问，他其实是一个有水印的链接，仔细观察发现最后那里有一段/playwm，有两个字母wm其实就是watermark英语单词的缩写，去掉wm后就能得到一个无水印链接了

https://aweme.snssdk.com/aweme/v1/play/?video_id=v0200fg10000c85i9ejc77ue0kb2vo80&ratio=720p&line=0

Java实现超简单抖音去水印的示例详解

到这里无水印已经完成了

三、代码实现

这里我用的是Java去实现，这个跟语言无关，只要能发请求就行

/**
* 下载抖音无水印视频
*
* @throws IOException
*/
@GetMapping(value = "/downloadDy")
public void downloadDy(String dyUrl, HttpServletResponse response) throws IOException {
  ResultDto resultDto = new ResultDto();
  try {
      dyUrl = URLDecoder.decode(dyUrl).replace("dyUrl=", "");
      resultDto = dyParseUrl(dyUrl);
  } catch (Exception e) {
      e.printStackTrace();
  }

  if (resultDto.getVideoUrl().contains("http://")) {
      resultDto.setVideoUrl(resultDto.getVideoUrl().replace("http://", "https://"));
  }

  String videoUrl = resultDto.getVideoUrl();

  response.sendRedirect(videoUrl);
} 
  
public ResultDto dyParseUrl(String redirectUrl) throws Exception {

      redirectUrl = CommonUtils.getLocation(redirectUrl);
      ResultDto dyDto = new ResultDto();

      if (!StringUtils.isEmpty(redirectUrl)) {
          /**
           * 1、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(CommonUtils.DOU_YIN_BASE_URL).append(itemId);

          String videoResult = CommonUtils.httpGet(sb.toString());

          DYResult dyResult = JSON.parseObject(videoResult, DYResult.class);

          /**
           * 2、无水印视频 url
           */
          String videoUrl = dyResult.getItem_list().get(0)
                  .getVideo().getPlay_addr().getUrl_list().get(0)
                  .replace("playwm", "play");
          String videoRedirectUrl = CommonUtils.getLocation(videoUrl);

          dyDto.setVideoUrl(videoRedirectUrl);
          /**
           * 3、音频 url
           */
          String musicUrl = dyResult.getItem_list().get(0).getMusic().getPlay_url().getUri();
          dyDto.setMusicUrl(musicUrl);
          /**
           * 4、封面
           */
          String videoPic = dyResult.getItem_list().get(0).getVideo().getDynamic_cover().getUrl_list().get(0);
          dyDto.setVideoPic(videoPic);

          /**
           * 5、视频文案
           */
          String desc = dyResult.getItem_list().get(0).getDesc();
          dyDto.setDesc(desc);
      }
      return dyDto;
  }

ResultDto.java

public class ResultDto {

  private String videoUrl;    //视频

  private String musicUrl;    //背景音乐

  private String videoPic;    //无声视频

  private String desc;

  public String getDesc() {
      return desc;
  }

  public void setDesc(String desc) {
      this.desc = desc;
  }

  public String getVideoUrl() {
      return videoUrl;
  }

  public void setVideoUrl(String videoUrl) {
      this.videoUrl = videoUrl;
  }

  public String getMusicUrl() {
      return musicUrl;
  }

  public void setMusicUrl(String musicUrl) {
      this.musicUrl = musicUrl;
  }

  public String getVideoPic() {
      return videoPic;
  }

  public void setVideoPic(String videoPic) {
      this.videoPic = videoPic;
  }
}

CommonUtils .java

public class CommonUtils {

  public static String DOU_YIN_BASE_URL = "https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?item_ids=";

  public static String HUO_SHAN_BASE_URL = " https://share.huoshan.com/api/item/info?item_id=";

  public static String DOU_YIN_DOMAIN = "douyin";

  public static String HUO_SHAN_DOMAIN = "huoshan";

  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 "";
  }

  public static String matchNo(String redirectUrl) {
      List<String> results = new ArrayList<>();
      Pattern p = Pattern.compile("video/([\\w/\\.]*)/");
      Matcher m = p.matcher(redirectUrl);
      while (!m.hitEnd() && m.find()) {
          results.add(m.group(1));
      }
      return results.get(0);
  }

  public static String hSMatchNo(String redirectUrl) {
      List<String> results = new ArrayList<>();
      Pattern p = Pattern.compile("item_id=([\\w/\\.]*)&");
      Matcher m = p.matcher(redirectUrl);
      while (!m.hitEnd() && m.find()) {
          results.add(m.group(1));
      }
      return results.get(0);
  }

  public static String httpGet2(String urlStr) throws Exception {
      URL url = new URL(urlStr);
      HttpURLConnection conn = (HttpURLConnection) url.openConnection();
      conn.setRequestMethod("GET");
      conn.setRequestProperty("Content-Type", "text/json;charset=utf-8");
      BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
      StringBuffer buf = new StringBuffer();
      String inputLine = in.readLine();
      while (inputLine != null) {
          buf.append(inputLine).append("\r\n");
          inputLine = in.readLine();
      }
      in.close();
      return buf.toString();
  }

  /**
   * 使用Get方式获取数据
   *
   * @param url URL包括参数，http://HOST/XX?XX=XX&XXX=XXX
   * @return
   */
  public static String httpGet(String url) {
      String result = "";
      BufferedReader in = null;
      try {
          URL realUrl = new URL(url);
          // 打开和URL之间的连接
          URLConnection connection = realUrl.openConnection();
          // 设置通用的请求属性
          connection.setRequestProperty("accept", "*/*");
          connection.setRequestProperty("connection", "Keep-Alive");
          connection.setRequestProperty("user-agent",
                  "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
          // 建立实际的连接
          connection.connect();
          // 定义 BufferedReader输入流来读取URL的响应
          in = new BufferedReader(new InputStreamReader(
                  connection.getInputStream(), "UTF-8"));
          String line;
          while ((line = in.readLine()) != null) {
              result += line;
          }
      } catch (Exception e) {
          System.out.println("发送GET请求出现异常！" + e);
          e.printStackTrace();
      }
      // 使用finally块来关闭输入流
      finally {
          try {
              if (in != null) {
                  in.close();
              }
          } catch (Exception e2) {
              e2.printStackTrace();
          }
      }
      return result;
  }

  public static String parseUrl(String url) {

      String host = "";
      Pattern p = Pattern.compile("http[:|/|\\w|\\.]+");
      Matcher matcher = p.matcher(url);
      if (matcher.find()) {
          host = matcher.group();
      }

      return host.trim();
  }

  /**
   * 查找域名（以 https开头 com结尾）
   *
   * @param url
   * @return
   */
  public static String getDomainName(String url) {

      String host = "";
      Pattern p = Pattern.compile("https://.*\\.com");
      Matcher matcher = p.matcher(url);
      if (matcher.find()) {
          host = matcher.group();
      }

      return host.trim();
  }
}