I have a wireless Access point with another system using debian and squid/dansguardian as a transparent proxy to filter adult content.
I can see that 90% the traffic comes from android phones and people used them to update their applications using wifi instead of using their data plan.
So I tried to force Squid to cache the apk files using those lines on /etc/squid/squid.conf:
acl market rep_mime_type application/vnd.android.package-delta
cache allow market
But when check the /var/log/squid/access.log I can not see that Squid is caching
1405755182.383 28048 127.0.0.1 TCP_MISS/200 5858532 GET http://r11—sn-h5q7eney.c.android.clients.google.com/market/GetBinary/GetBinary/com.whatsapp/48513:48450:2?
– DIRECT/74.125.168.112 application/vnd.android.package-delta
Best Answer
I don't think is possible, play store now sends delta updates so even if you decide to cache that requests you would only be caching chunks of apk. Please note that the request you posted has parameters as there is query character (?) at the end and squid won't cache those requests by default.