Having trouble getting ASP.NET URL rewrite to exclude a specific file

1
votes

I want to redirect all HTTP requests to my site to HTTPS except for the file "/blah.txt". Here's the basic rewriting rule I've been trying. I've tried to use {REQUEST_FILENAME} and {URL}. I've tried several different patterns that I thought should match.

The rule below redirect every request to HTTPS including requests for blah.txt

        <rewrite>
        <rules>
            <clear />
            <rule name="Redirect to HTTPS" stopProcessing="true">
                <match url="(.*)" />
                <conditions logicalGrouping="MatchAll" trackAllCaptures="false">
                    <add input="{HTTPS}" pattern="^OFF$" />
                    <add input="{REQUEST_FILENAME}" matchType="Pattern" pattern="blah\.txt$" ignoreCase="true" negate="true" />
                </conditions>
                <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" />
            </rule>
        </rules>
    </rewrite>
2
asp.neturl-rewritingrewrite

2 Answers

2
votes

Thanks Bryan for changing my direction of thought. Sometimes I get stuck thinking that my solution will work based on bugless code. In fact it appears that there is a bug in the rewriter that makes my first attempt at writing a rule fail. However, this rule DOES work:

     <rewrite>
        <rules>
            <clear />
            <rule name="Temp" stopProcessing="true">
                <match url="(.*)" />
                <conditions logicalGrouping="MatchAll" trackAllCaptures="false">
                    <add input="{REQUEST_FILENAME}" pattern="blah\.txt$" />
                </conditions>
                <action type="None" />
            </rule>
            <rule name="Redirect to HTTPS" stopProcessing="true">
                <match url="(.*)" />
                <conditions logicalGrouping="MatchAll" trackAllCaptures="false">
                    <add input="{HTTPS}" pattern="^OFF$" />
                </conditions>
                <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" />
            </rule>
        </rules>
    </rewrite>

Putting the matching rule in front of the other rule and causing it to stop processing of rules seems to work.

1
votes

I only see one rule... that seems to match everything. You need at least two rules here.

I'm not that familiar with IIS rewrite's feature. So two questions:

Is there a "do nothing" action?

Won't any all-inclusive rule match ALL requests? You probably need to put your blah.txt rule first.