IIS URL Rewrite 2.0,url重写，伪静态
IIS URL Rewrite 2.0出来好像不短时间了，由于也没什么特别需求，也就没对他有研究兴趣。最近维护另外一个小组开放的程序，发现其使用的就是IIS URL Rewrite 2.0了，而起rewrite规则都写在webconfig中，这就不由得我不管这事了。
曾经为了避免频繁修改webconfig而导致的站点重启，重写了MS提供的IIS URL Rewrite 1.1，讲规则存储在单独的数据文件中，再用个文件缓存依赖来实现实时修改。
而如今2.0的配置还写在webconfig里头，难道又想让我重新2.0的东东。
找到了2.0的相关资料，也找到了其源代码，发现其是支持扩展的，支持规则存于其他数据文件的。
http://www.iis.net/download/URLRewrite详细信息参考官方文档了。
这里列下2.0的特点：
Features
[*]Rules-based URL rewriting engine
[*]Rules-based response rewriting engine
[*]Support for custom .NET rewrite providers
[*]Regular expression pattern matching
[*]Wildcard pattern matching
[*]Global and distributed rewrite rules
[*]Rewriting within the content of specific HTML tags
[*]Pre-conditions for outbound rules
[*]Access to server variables and HTTP headers
[*]Rewriting of server variables and HTTP request headers
[*]Rewriting of HTTP response headers
[*]Allow list for server variables
[*]HtmlEncode function
[*]Built-in rule templates
[*]Reverse proxy rule template
[*]Rule templates for Search Engine Optimization
[*]Various rule actions including redirect and request abort
[*]Tracking capture groups across rule conditions
[*]Logging of rewritten URLs
[*]Updated user interface in IIS Manager
[*]Integrated user interface for managing rewrite rules and rewrite maps
[*]Integrated user interface for importing of Apache mod_rewrite rules
[*]Integrated user interface for testing regular expression and wildcard patterns
[*]Support for IIS kernel-mode and user-mode output caching
[*]Lowercase conversion function
[*]Rewrite maps to generate the substitution URL during rewriting
[*]Failed Request Tracing support
好处多多，可以了解下，有些方面估计还用得到。
Support for custom .NET rewrite providers 这玩意支持让你方便修改存储位置。
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