IIS基于长度参数重写规则 [英] IIS Rewrite rule based on length param

问题描述

我有以下重写规则

<rule name="Product short redirect" stopProcessing="true">
      <match url="product/([A-Za-z0-9]+)/$" ignoreCase="true" />
      <action type="Redirect" redirectType="Permanent"  url="product-redirect/?code={R:1}" />
    </rule>

但我希望它只匹配超过3个字符的产品代码

However i want it only to match product codes that are longer than 3 characters

<rule name="Product short redirect" stopProcessing="true">
      <match url="product/([A-Za-z0-9].{4}+)/$" ignoreCase="true" />
      <action type="Redirect" redirectType="Permanent"  url="product-redirect/?code={R:1}" />
    </rule>

但这只返回部分匹配，而且三个字符代码仍然匹配？

But this only returns a partial match and also the three characters codes still match ??

部分网址示例如下：

product/u22tfp1/

和

product/xxx/

推荐答案

如果您只想匹配那些产品是4个字符或更多，你需要在正则表达式上指定长度：

If you want to only match products that are 4 characters or more, you need to specify the length on the regular expression:

EG：想要匹配（产品/ 1234 / 或产品/ 12345 / ）

E.G: Want a match of (products/1234/ OR products/12345/ )

<match url="product\/([A-Za-z0-9]{4,100}+)\/$" />

我在这个例子中使用了4到100之间的匹配（你也可以明确地避免与3匹配）字符，但在我看来看起来更丑陋）

I use a match between 4 and 100 on this example (you can also explicitly avoid a match with 3 characters, but it looks uglier on my opinion)

注意：
前一个正则表达式的问题 product /（[A- Za-z0-9]。{4} +）/ $ 是匹配所有内容的点字符。，基本上你说匹配：

NOTE: The problem with the previous regular expression product/([A-Za-z0-9].{4}+)/$ is the dot character . that matches everything, basically you are saying match:

 "product/" then 
 "a single character/digit [a-Z0-9]" then 
 "anything with a length of 4"(repeat this last statement "+" ) 

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