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• 10-13-2008, 4:56 PM

  speednet Joined on 06-23-2005, 11:35 PM Posts 7

  Pulling Backreferences from Multiple Conditions Reply Contact I am running into a problem when trying to construct a rewritten URL that contains backreferences to more than one condition. I am trying to match more than one QueryString variable, and the complicating factor with QueryStrings is that you never know the order the variables will be in.  So I am using one condition per QueryString variable. For example: <conditions>     <add input="{QUERY_STRING}" pattern="(?:^|&amp;)var1=([1-9]\d+)(?:&amp;|$)" />     <add input="{QUERY_STRING}" pattern="(?:^|&amp;)var2=([1-9]\d+)(?:&amp;|$)" /> </conditions> My assumption was that the first condition would make {C:0} and {C:1} available, and the second condition would make {C:2} and {C:3} available. Thus, my rewrite rule looks like this: <action type="Redirect" url="newpage.aspx/{C:1}/{C:3}" appendQueryString="false" redirectType="Permanent" /> However, the URL Rewriter tool gives me the error message, "Invalid condition back reference. The index 3 is invalid." So how am I supposed to access the backreferences in all the conditions that come after the first one? Thanks very much for your help!

  Tags: BackreferencesURL Rewrite ModuleConditions

• 10-13-2008, 5:42 PM

  In reply to

  ruslany Joined on 07-01-2007, 7:38 PM Redmond, WA Posts 660

  Re: Pulling Backreferences from Multiple Conditions Reply Contact Within a rule action, you can use the back-references to the the last matched condition of that rule. Also within a condition input string, you can use the back-references to the previously matched condition. With that in mind, a possible way to do what you are trying to do is to use the back-reference from previous condition in the next condition's input: <conditions>     <add input="{QUERY_STRING}" pattern="(?:^|&amp;)var1=([1-9]\d+)(?:&amp;|$)" />     <add input="%{C:1}%_{QUERY_STRING}" pattern="%(.+)%_.*var2=([1-9]\d+)(?:&|$)" /> </conditions> Then the action of the rule will look like this: <action type="Redirect" url="newpage.aspx/{C:1}/{C:2}" appendQueryString="false" redirectType="Permanent" /> http://ruslany.net

  Tags: querystring

• 10-13-2008, 9:47 PM

  In reply to

  speednet Joined on 06-23-2005, 11:35 PM Posts 7	Re: Pulling Backreferences from Multiple Conditions Reply Contact GREAT reply, thank you very much ruslany!  That is incredibly helpful, and not something I was able to locate on any of the support pages.