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<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">Hi Alex,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">That makes a lot of sense, I don’t know how I overlooked that – thank you. I also agree, logically caching a 201 response makes little sense, and it was just an example I had that
was easy to try so I used that. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">I just altered the HTTP Return code so it sent 200 instead of 201, and the result is sadly the same, I get many, many lines like this:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1">1664272638.443</span><span class="apple-converted-space">
</span><span class="s1">10107 10.1.1.70 TCP_MISS/200 275 POST http://192.168.0.2:3001/InternalCommunicationServices/message/email - HIER_DIRECT/192.168.0.2 application/json</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">My suspicion is still that my refresh_pattern is wrong:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">refresh_pattern -i http:\/\/129.168.0.2:3001\/.* 10080 100% 43200 override-lastmod<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Default Sans Serif"">Kind regards,<br>
<br>
Andy Armstrong </span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"MS Mincho"">安迪</span><span style="font-family:"Default Sans Serif"">
</span><span style="font-family:"MS Mincho"">阿姆斯特朗</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Default Sans Serif"">Principal Specialist for Z Technologies</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Default Sans Serif"">EMEA Squad Leader for Hybrid Cloud<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Default Sans Serif"">Worldwide Community Leader for Hybrid Cloud<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Default Sans Serif"">Member of the CTO Office Server & Storage EMEA<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Default Sans Serif"">Distinguished Technical Specialist – The Open Group</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Default Sans Serif"">IBM Master Inventor<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><br>
</span><span style="font-family:"Default Sans Serif"">Mobile: +447500103874</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">squid-users <squid-users-bounces@lists.squid-cache.org> on behalf of Alex Rousskov <rousskov@measurement-factory.com><br>
<b>Date: </b>Monday, 26 September 2022 at 21:07<br>
<b>To: </b>squid-users@lists.squid-cache.org <squid-users@lists.squid-cache.org><br>
<b>Subject: </b>[EXTERNAL] Re: [squid-users] TCP_MISS only<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">On 9/26/22 15:27, Andy Armstrong wrote:<br>
<br>
> My aim – is that for any HTTP response from 192.168.0.2:3001 is<br>
> cached and served from the cache.<br>
<br>
> 1664219486.83610098 10.1.1.70 TCP_MISS/201 492 POST <br>
> </span><a href="http://192.168.0.2:3001/InternalCommunicationServices/message/email"><span style="font-size:11.0pt">http://192.168.0.2:3001/InternalCommunicationServices/message/email</span></a><span style="font-size:11.0pt">
- <br>
> HIER_DIRECT/192.168.0.2 application/json<br>
<br>
Squid does not cache responses with HTTP status code 201 (Created). Per <br>
HTTP protocol, such responses are not cachable "by default" and Squid is <br>
not smart enough to check whether a particular 201 response has headers <br>
that would allow Squid to overwrite that default. The specific response <br>
in question probably does not have those headers, but I am mentioning <br>
them here for completeness sake.<br>
<br>
Furthermore, a "Created" response to a POST request probably does not <br>
contain anything you would want to cache -- things will probably break <br>
if that "create something" POST request is satisfied from the cache the <br>
next time around. You may need to study the HTTP server in question and <br>
adjust your goals from "cache any 192.168.0.2:3001 response" to <br>
something more nuanced, based on what that server does.<br>
<br>
<br>
HTH,<br>
<br>
Alex.<br>
<br>
<br>
<br>
<br>
> My config is as follows:<br>
> <br>
> http_port 3128<br>
> <br>
> acl localnet src 10.0.0.0/8 # RFC1918 possible internal network<br>
> <br>
> acl localnet src 172.16.0.0/12 # RFC1918 possible internal network<br>
> <br>
> acl localnet src 192.168.0.0/16 # RFC1918 possible internal network<br>
> <br>
> acl localnet src fc00::/7 # RFC 4193 local private network range<br>
> <br>
> acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) <br>
> machines<br>
> <br>
> acl SSL_ports port 443<br>
> <br>
> acl Safe_ports port 80 # http<br>
> <br>
> acl Safe_ports port 21 # ftp<br>
> <br>
> acl Safe_ports port 443 # https<br>
> <br>
> acl Safe_ports port 70 # gopher<br>
> <br>
> acl Safe_ports port 210 # wais<br>
> <br>
> acl Safe_ports port 280 # http-mgmt<br>
> <br>
> acl Safe_ports port 488 # gss-http<br>
> <br>
> acl Safe_ports port 591 # filemaker<br>
> <br>
> acl Safe_ports port 777 # multiling http<br>
> <br>
> acl Safe_ports port 1025-65535 # unregistered ports<br>
> <br>
> acl CONNECT method CONNECT<br>
> <br>
> http_access deny !Safe_ports<br>
> <br>
> http_access deny CONNECT !SSL_ports<br>
> <br>
> http_access allow localhost manager<br>
> <br>
> http_access deny manager<br>
> <br>
> http_access allow localnet<br>
> <br>
> http_access allow localhost<br>
> <br>
> http_access deny all<br>
> <br>
> coredump_dir /squid/var/cache/squid<br>
> <br>
> cache_dir ufs /var/spool/squid 1024 16 256<br>
> <br>
> refresh_pattern -i </span><a href="http://192.168.0.2:3001%5C/.*"><span style="font-size:11.0pt">http://192.168.0.2:3001%5C/.*</span></a><span style="font-size:11.0pt">
10080 100% 43200 <br>
> override-lastmod<br>
> <br>
> refresh_pattern ^ftp: 1440 20% 10080<br>
> <br>
> refresh_pattern ^gopher: 1440 0% 1440<br>
> <br>
> refresh_pattern -i (/cgi-bin/|\?) 0 0% 0<br>
> <br>
> refresh_pattern . 0 20% <br>
> 4320<br>
> <br>
> The problem I am finding is that each time my client makes a call via <br>
> the proxy, I see this in the logs:<br>
> <br>
> 1664219486.83610098 10.1.1.70 TCP_MISS/201 492 POST <br>
> </span><a href="http://192.168.0.2:3001/InternalCommunicationServices/message/email"><span style="font-size:11.0pt">http://192.168.0.2:3001/InternalCommunicationServices/message/email</span></a><span style="font-size:11.0pt">
- <br>
> HIER_DIRECT/192.168.0.2 application/json<br>
> <br>
> I see the ‘TCP_MISS’, the client receives the response from the remote <br>
> server, but on subsequent calls, it continues to trigger TCP_MISS and I <br>
> never manage to cache the response.<br>
> <br>
> Please help me understand what I am missing from the configuration for <br>
> my intended use case.<br>
> <br>
> Kind regards,<br>
> <br>
> Andy Armstrong<br>
> <br>
> </span><span style="font-size:11.0pt;font-family:"MS Gothic"">安迪阿姆斯特朗</span><span style="font-size:11.0pt"><br>
> <br>
> Principal Specialist for Z Technologies<br>
> <br>
> EMEA Squad Leader for Hybrid Cloud<br>
> <br>
> Worldwide Community Leader for Hybrid Cloud<br>
> <br>
> Member of the CTO Office Server & Storage EMEA<br>
> <br>
> Distinguished Technical Specialist – The Open Group<br>
> <br>
> IBM Master Inventor<br>
> <br>
> <br>
> Mobile: +447500103874<br>
> <br>
> Unless otherwise stated above:<br>
> <br>
> IBM United Kingdom Limited<br>
> Registered in England and Wales with number 741598<br>
> Registered office: PO Box 41, North Harbour, Portsmouth, Hants. PO6 3AU<br>
> <br>
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