IIS Rewrite rule based on length param - url

Question

I have the following rewrite rule
<rule name="Product short redirect" stopProcessing="true">
<match url="product/([A-Za-z0-9]+)/$" ignoreCase="true" />
<action type="Redirect" redirectType="Permanent" url="product-redirect/?code={R:1}" />
</rule>
However i want it only to match product codes that are longer than 3 characters
<rule name="Product short redirect" stopProcessing="true">
<match url="product/([A-Za-z0-9].{4}+)/$" ignoreCase="true" />
<action type="Redirect" redirectType="Permanent" url="product-redirect/?code={R:1}" />
</rule>
But this only returns a partial match and also the three characters codes still match ??
Sample partial urls will be:
product/u22tfp1/
and
product/xxx/

Answer 1

If you want to only match products that are 4 characters or more, you need to specify the length on the regular expression:
E.G: Want a match of (products/1234/ OR products/12345/ )
<match url="product\/([A-Za-z0-9]{4,100}+)\/$" />
I use a match between 4 and 100 on this example (you can also explicitly avoid a match with 3 characters, but it looks uglier on my opinion)
NOTE:
The problem with the previous regular expression product/([A-Za-z0-9].{4}+)/$ 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 "+" )