Prerender IIS Web.config

web.config

<?xml version="1.0"?>
<configuration>
    <system.webServer>
        <httpProtocol>
            <customHeaders>
                <add name="X-Prerender-Token" value="XXXXXXXXXXXXX" />
            </customHeaders>
        </httpProtocol>
        <rewrite>
            <rules>
                <!--# Only proxy the request to Prerender if it's a request for HTML-->
                <rule name="Prerender" stopProcessing="true">
                    <match url="^(?!.*?(\.js|\.css|\.xml|\.less|\.png|\.jpg|\.jpeg|\.gif|\.pdf|\.doc|\.txt|\.ico|\.rss|\.zip|\.mp3|\.rar|\.exe|\.wmv|\.doc|\.avi|\.ppt|\.mpg|\.mpeg|\.tif|\.wav|\.mov|\.psd|\.ai|\.xls|\.mp4|\.m4a|\.swf|\.dat|\.dmg|\.iso|\.flv|\.m4v|\.torrent))(.*)" ignoreCase="false" />
                    <conditions logicalGrouping="MatchAny">
                        <add input="{HTTP_USER_AGENT}" pattern="baiduspider|facebookexternalhit|twitterbot" />
                        <add input="{QUERY_STRING}" pattern="_escaped_fragment_" ignoreCase="false" />
                    </conditions>
                    <action type="Rewrite" url="http://service.prerender.io/http://yourwebsite.com/{R:2}" />
                </rule>
            </rules>
        </rewrite>
    </system.webServer>
</configuration>

This worked for us. Our rewrite is as follows:

        <rule name="Seo rewrite rule" stopProcessing="true">
          <serverVariables>
            <set name="HTTP_X_PRERENDER_TOKEN" value="[...your token...]" />
          </serverVariables>
          <conditions>
            <add input="{QUERY_STRING}" pattern="(.*)_escaped_fragment_=(.*)" />
          </conditions>
          <action type="Rewrite" url="http://service.prerender.io/http://{HTTP_HOST}{REQUEST_URI}" appendQueryString="false" />
        </rule>

As far as the "allowableServerVariables", we handled this through the IIS and clicking either the Default Web Site of the Site itself, then clicking the URL Rewrite module icon, then select View Server Variables, and add the HTTP_X_PRERENDER_TOKEN variable name to the list.

With this in place, we were now able to append the escaped_fragment querystring to our urls and see the rewritten results after coming back through the server. You should also be able to verify in your Account page on PreRender.io that the pages are being cached.

HTH,
Randy

Hi!!

I spend a lot days for the solution, but i add the variable and works fine!!!

Solution for me :

Only exist the web.config with the configuration (Htm5 redirect and this) , i dont need it applicationHos.xdt.:

---

<rewrite>
          <rules>
              <!--# Only proxy the request to Prerender if it's a request for HTML-->
              <rule name="SEO" stopProcessing="true">
              <match url="^(?!.*?(\.js|\.css|\.xml|\.html|\.less|\.png|\.jpg|\.jpeg|\.gif|\.pdf|\.doc|\.txt|\.ico|\.rss|\.zip|\.mp3|\.rar|\.exe|\.wmv|\.doc|\.avi|\.ppt|\.mpg|\.mpeg|\.tif|\.wav|\.mov|\.psd|\.ai|\.xls|\.mp4|\.m4a|\.swf|\.dat|\.dmg|\.iso|\.flv|\.woff|\.ttf|\.m4v|\.svg|\.torrent))(.*)" ignoreCase="false" />
              <conditions logicalGrouping="MatchAny">
                  <add input="{HTTP_USER_AGENT}" pattern="facebookexternalhit|twitterbot|googlebot|whatsapp" />
                  <add input="{QUERY_STRING}" pattern="(.*)_escaped_fragment_=(.*)" ignoreCase="false" />
              </conditions>
                  <action type="Rewrite" url="http://service.prerender.io/http://{HTTP_HOST}{REQUEST_URI}" appendQueryString="false" /> 
              <serverVariables>
                <set name="HTTP_X_PRERENDER_TOKEN" value="yourtoken" /> 
              </serverVariables>
              </rule>
              <rule name="Redirect To Index" stopProcessing="true">
                  <match url=".*" />
                  <conditions>
                      <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                      <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                  </conditions>
                  <action type="Rewrite" url="/" />
              </rule> 
          </rules>
      </rewrite>

---

The next step was as you indicates ; add into Rewrite module icon, then select View Server Variables, the new variable name "HTTP_X_PRERENDER_TOKEN" and works !! amazing =)!!

Thnks for your time.

I want to share my test options ;

1.-https://technicalseo.com/tools/fetch-render/
2.-https://developers.facebook.com/tools/debug

Any ask or something im here