IIS 7.5 Reverse Proxy URL Re-Write to website with gzip

Question

If we own www.ourdomain.com and wanted to rewrite the url to say www.google.com, how would we deal with gzip compression on say the google domain. I'm trying to do a proof of concept and i believe the issue is the website we are trying to rewite to uses gzip so IIS cant read the content? I have disabled all compression on our side. DO we need some sort of precondition?

HTTP Error 500.52 - URL Rewrite Module Error. Outbound rewrite rules cannot be applied when the content of the HTTP response is encoded ("gzip").

    <?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <urlCompression doStaticCompression="false" doDynamicCompression="false" dynamicCompressionBeforeCache="false" />
    <rewrite>
      <outboundRules>
        <rule name="ReverseProxyOutboundRule1" preCondition="ResponseIsHtml1">
          <match filterByTags="A, Form, Img" pattern="https://google.com/(.*)" />
          <action type="Rewrite" value="http{R:1}://ourdomain.com/{R:2}" />
        </rule>
      </outboundRules>
      <rules>
        <rule name="ReverseProxyInboundRule1" stopProcessing="true">
          <match url="(.*)" />
          <action type="Rewrite" url="http://google.com/{R:1}" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>

You have compression enabled elsewhere in IIS – Brock Hensley May 02 '14 at 17:00 — Brock Hensley, May 02 '14 at 17:00

score 2 · Accepted Answer · answered May 02 '14 at 22:49

2

Found the answer after a lot of playing about

      <serverVariables>
        <set name="HTTP_Accept-Encoding" value="" />
      </serverVariables>

answered May 02 '14 at 22:49

MrBeanzy

171
9

Basically you turned off compression on your backends... Outbound HTML content link rewrites are a sign of a broken design. It is usually an indicator of some workarounds. – gavenkoa Dec 04 '22 at 10:26

IIS 7.5 Reverse Proxy URL Re-Write to website with gzip

1 Answers1