<span style='font-family:Verdana'><span style='font-size:12px'>Hello,<br /> 
<br /> 
I managed to add an new header:<br /> 
<br /> 
x-url: /topic/123-my-topic/<br /> 
<br /> 
So I just need to add this bit?<br /> 
<br /> 
sub vcl_fetch {<br /> 
  if (req.request == "POST" && beresp.http.x-url) {<br /> 
    purge("obj.http.host == example.com && req.url ~ " beresp.http.x-url);<br /> 
  }<br /> 
}<br /> 
<br /> 
Note that I need to purge /topic/123-my-topic/ and /topic/123-my-topic/all pages after slash.<br /> 
In this case can I use purge("obj.http.host == example.com && req.url ~ " beresp.http.x-url.*$);?<br /> 
<br /> 
Thanks<br /> 
<br /> 
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                <span style="font-family:Verdana"><span style="font-size:12px">----- Original Message -----</span></span></p> 
        <p style="margin:0px; padding:0px;" > 
                <span style="font-family:Verdana"><span style="font-size:12px">From: Rob S</span></span></p> 
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                <span style="font-family:Verdana"><span style="font-size:12px">Sent: 07/06/11 11:25 AM</span></span></p> 
        <p style="margin:0px; padding:0px;" > 
                <span style="font-family:Verdana"><span style="font-size:12px">To: varnish-misc@varnish-cache.org</span></span></p> 
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                <span style="font-family:Verdana"><span style="font-size:12px">Subject: Re: Purging on form submit</span></span></p> 
        <br /> 
        <div bgcolor="#ffffff" text="#000000"> 
                On 06/07/2011 10:26, Nuno Neves wrote: 
                <blockquote type="cite"> 
                        <span style="font-family: Verdana;"><span style="font-size: 12px;">how can I get the hiden input value I have that tell varnish that we have a new post? <br /> 
                        <br /> 
                        <span class="webkit-html-tag"><input <span class="webkit-html-attribute-name">type</span>="<span class="webkit-html-attribute-value">hidden</span>" <span class="webkit-html-attribute-name">name</span>="canpurge" <span class="webkit-html-attribute-name">value</span>="/topic/123-my-topic/" /></span> <br /> 
                        <br /> 
                        I was thinking of something like this:</span></span><br /> 
                        <br /> 
                        <div> 
                                <span style="font-family: Verdana;"><span style="font-size: 12px;">sub vcl_recv {</span></span></div> 
                        <div> 
                                <span style="font-family: Verdana;"><span style="font-size: 12px;">    if (req.request == "POST" && FORM.FIELD == "canpurge) {</span></span></div> 
                        <div> 
                                <span style="font-family: Verdana;"><span style="font-size: 12px;">        purge req.http.host == example.com && req.url ~ ^FORM.CANPURGE.VALUE.*$</span></span></div> 
                        <div> 
                                <span style="font-family: Verdana;"><span style="font-size: 12px;">    }</span></span></div> 
                        <div> 
                                <span style="font-family: Verdana;"><span style="font-size: 12px;">}</span></span></div> 
                </blockquote> 
                <br /> 
                Nuno:<br /> 
                <br /> 
                Varnish can't see the body of the response.  However, if you're able to change the response, you can just add an HTTP header with this information.  Then, in vcl_fetch (which is where the HTTP request is sent to the backend), you can probably add something like:<br /> 
                <br /> 
                sub vcl_fetch {<br /> 
                  if (beresp.http.x-purgepattern) {<br /> 
                    purge("obj.http.host == example.com && req.url ~ " beresp.http.x-purgepattern);<br /> 
                  }<br /> 
                }<br /> 
                <br /> 
                <br /> 
                Rob</div> 
</blockquote> 
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