假设下面是你的视频网站链接列表，如果别人想爬取你的数据十分轻松，看规则就知道数据库是序列自增的
http://www.xxxx.com/video/1
http://www.xxxx.com/video/2
http://www.xxxx.com/video/3
那么解决这一问题，我们可以使用短地址，不对外暴露真实链接，使用对称加密是一个很好的方案。
Hashids是一个很好的选择，它提供了JS/PHP/JAVA/PYTHON等编程语言的实现，这里我使用的就是它。
下面是我基于blade框架搭建的java短地址服务。
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CREATE TABLE `t_url` ( `id` int(10) NOT NULL AUTO_INCREMENT, `url` text NOT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8; |
路由
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@Pathpublic class IndexRoute { // 盐值 private static final Hashids HASHIDS = new Hashids("blade-shorturl"); private UrlModel urlModel = new UrlModel(); @Route("/:key") public void get(Request req, Response response) { String key = req.pathParam(":key").replaceAll("[^A-Za-z0-9]", ""); long[] numbers = HASHIDS.decode(key); if (null == numbers || numbers.length < 1) { response.text("没有找到"); return; } int id = (int) numbers[0]; String result = get(id).getUrl(); if (result == null) { response.text("没有找到"); return; } response.redirect(result); } @Route(value = "/", method = HttpMethod.GET) public String index() { return "index"; } @Route(value = "/", method = HttpMethod.POST) public String save(Request request, Response response) { String resJsp = "index"; String longUrl = request.query("url"); if (!isURL(longUrl)) { request.attribute("error", "无效的URL"); return resJsp; } Integer id = this.save(longUrl); if (id == 0) { request.attribute("error", "保存失败"); return resJsp; } String hash = HASHIDS.encode(id); request.attribute("url_hash", hash); System.out.println("id = " + id + ",url_hash=" + hash); return resJsp; } private Integer save(String url) { return urlModel.insert().param("url", url).executeAndCommit(); } private UrlModel get(int id) { return urlModel.fetchByPk(id); } private final String REGEX = "\\b(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]"; private boolean isURL(String url) { if(StringKit.isNotBlank(url)){ Pattern pattern = Pattern.compile(REGEX); Matcher matcher = pattern.matcher(url); if (matcher.find()) { return true; } } return false; }} |
实现效果：
代码位置：https://github.com/bladejava/blade-shorturl
以上就是本文的全部内容，希望对大家的学习有所帮助。
