Java Tomcat 7 中的 URLRewrite
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URLRewrite in Tomcat 7
提问by KK99
I am planning to develop an Intranet application (Java client, JSP, SQLite)
我正在计划开发一个内网应用程序（Java 客户端、JSP、SQLite）
Goal of this is that when a user clicks on the link, if the user has access (to a team which is handled in the business logic) a file should be provided for download
这样做的目标是，当用户单击链接时，如果用户有权访问（访问业务逻辑中处理的团队），则应提供文件以供下载
There is a table in the db which holds the info and below is the example row
数据库中有一个表，其中包含信息，下面是示例行
ID | file | team | md5
1 | D:\test\output_20140915_100012.zip | Falcon | 5cceaf4cc400fd8f5c7fb4b2af754f4093369f59
where MD5 is the MD% checksum of the string "D:\test\output.zip" and not the file itself
其中 MD5 是字符串“D:\test\output.zip”的 MD% 校验和，而不是文件本身
I create the MD5 just for the sake of having random number. Reason I don't use RAND is to avoid collision (this part is trivial)
我创建 MD5 只是为了获得随机数。我不使用 RAND 的原因是为了避免碰撞（这部分是微不足道的）
I want my URL to look like this
我希望我的网址看起来像这样
http://mywebserver:8080/<appname>/5cceaf4cc400fd8f5c7fb4b2af754f4093369f59
Which should be taken to
应该采取哪些措施
http://mywebserver:8080/<appname>/download.jsp?id=5cceaf4cc400fd8f5c7fb4b2af754f4093369f59
I am using Tomcat and I am wondering if how we could have a URL rewrite for this scenario
我正在使用 Tomcat，我想知道我们是否可以为此场景重写 URL
回答by Tobías
I would recommend to do it with Apache HTTP Server or another server. But if you want to do it only with Tomcat 7 use Tuckey UrlRewriteFilter:
我建议使用 Apache HTTP Server 或其他服务器来完成。但是，如果您只想使用 Tomcat 7 执行此操作，请使用Tuckey UrlRewriteFilter：
A Java Web Filter for any compliant web application servers (such as Tomcat, JBoss, Jetty or Resin), which allows you to rewrite URLs before they get to your code. It is a very powerful tool just like Apache's mod_rewrite.
适用于任何兼容 Web 应用程序服务器（例如 Tomcat、JBoss、Jetty 或 Resin）的 Java Web 过滤器，它允许您在 URL 到达您的代码之前对其进行重写。它是一个非常强大的工具，就像 Apache 的 mod_rewrite 一样。
This filter allows you to define rules like:
此过滤器允许您定义如下规则：
Clean a url
<rule> <from>/products/([0-9]+)</from> <to>/products/index.jsp?product_id=</to> </rule>eg, /products/1234 will be passed on to /products/index.jsp?product_id=1234 without the user noticing
清理一个网址
<rule> <from>/products/([0-9]+)</from> <to>/products/index.jsp?product_id=</to> </rule>例如， /products/1234 将被传递到 /products/index.jsp?product_id=1234 而不引起用户注意
from Tuckey urlrewrite example
Since Tomcat 8 you can use the rewrite valve.
从 Tomcat 8 开始，您可以使用重写阀。
The rewrite valve implements URL rewrite functionality in a way that is very similar to mod_rewrite from Apache HTTP Server.
重写阀实现 URL 重写功能的方式与来自 Apache HTTP Server 的 mod_rewrite 非常相似。
