[squid-users] adding cache_control = nocache to http request using squid transparent proxy

[Amos Jeffries]

On 29/07/22 23:39, muhanad wrote:
> Hi
> 
> I apologize for my late reply. I guess I wasn't fully clear about my reason
> for why I need to stop the contents from being cached.
> First, here in Iraq the internet service is extremely expensive for ISP to
> provide services for home users.
> The ISP usually pay 25$ per 1Mbit/sec of bandwidth to the government on the
> other hand the end users expect to pay 2$ per 1Mbit/sec. so the ISPs need to
> rely heavily on caching and CDNs. Most of CDN companies hesitate heavily
> before operating their services in Iraq and most of ISPs can't provide the
> infrastructure for CDN operations ( namely high bandwidth required by CDN
> vendors such us Akamai, CDN77, etc. ) this led us to make our company
> specialized in providing caching and CDN traffic for ISPs.
> The issue we are facing here is some of the CDNs we have provide cacheable
> HTTP content, the ISPs that use our services just cache these contents on
> their local cache engines thus their traffic consumption from our CDNs will
> drop significantly causing us huge revenue losses because the CDN is still
> consuming bandwidth and minimal bandwidth. For this I am asking is there a
> way by using transparent Squid proxy to turn this cacheable content to
> non-cacheable one?.
> 


What you want then is actually the "no-store" control. To prevent 
recipients storing the response.

   reply_header_add Cache-Control no-store


Cheers
Amos