CODEWITHSUNDEEP
asp.netregexiis-7url-rewriting
Andrey Labodin
Andrey Labodin

Reputation: 63

regular expression - url with parameters

I am trying to make a rule for URL Rewrite 2.0 my internal URL is

http://someserver.net/in40/data/getcase.ashx?type=Good&format=json

("in40" is an application)

I need the following URL to work

http://someserver.net/in40/data/getcase/Good?fmt=json

rule

<match url="^data/getcase/([_0-9a-z-]+)\?fmt=([_0-9a-z-]+)$" />
<action type="Rewrite" url="data/getcase.ashx?type={R:1}&amp;format={R:2}" />

doesn't work

but if I change \?fmt= to /

<match url="^data/getcase/([_0-9a-z-]+)/([_0-9a-z-]+)$" />

then the following URL works fine

http://someserver.net/in40/data/getcase/Good/json

How to make the rewrite rule for 

http://someserver.net/in40/data/getcase/Good?fmt=json

Upvotes: 1

Views: 475

Answers (3)

Andrey Labodin
Andrey Labodin

Reputation: 63

My previous rule definitions was wrong and URL Rewrite mudule couldn't see the "?" symbol because I didn't have a "conditions" section and I had to include it. And even after that I had wrong "input" parameter in rule definition - {QUERY_STRING}. When the module "sees" the

<add input="{QUERY_STRING}.....

string then it will search for {QUERY_STRING} which is a part of URL right AFTER the "?" symbol :) I have replaced {QUERY_STRING} with {REQUEST_URI} to match entire URL instead The following example works for me.

<rule name="Boo" stopProcessing="true">
  <match url="^(.+)" />
  <conditions>
    <add input="{REQUEST_URI}" pattern="data/getcase/([_0-9A-Za-z-]+)\?fmt=([_0-9A-Za-z-]+)$" ignoreCase="true" />
  </conditions>
  <action type="Rewrite" url="data/getcase.ashx?type={C:1}&amp;format={C:2}" appendQueryString="false" />
</rule>

Upvotes: 1

Marius Schulz
Marius Schulz

Reputation: 16440

The regex engine needs a backslash in front of the question mark to interpret it as a literal rather than the optional quantifier, which is why you'll have to escape the backslash itself: \\? This process is called double-escaping.

When writing regexes in C#, you usually use the @ sign in front of the pattern string so you don't have to double-escape backslashes.

Upvotes: 0

cheesemacfly
cheesemacfly

Reputation: 11762

The problem is that [_0-9a-z-]+ in your regex doesn't allow Good as it starts with an upper G. One solution would be to make sure the ignoreCase option is turned on for the path.
The second issue is that the query string should be treated in the condition and not in the path. In your case, it would go as follow:

<rule name="My rewrite" stopProcessing="true">
    <match url="^data/getcase/([_0-9a-z-]+)$" ignoreCase="true" />
    <conditions>
        <add input="{QUERY_STRING}" pattern="^fmt=([_0-9a-z-]+)$" />
    </conditions>
    <action type="Rewrite" url="data/getcase.ashx?type={R:1}&amp;format={C:1}" />
</rule>

Upvotes: 1

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