commit d9e8f8f6479a8b4abe31eb5bfb9023de1bbca8af Author: David Fifield david@bamsoftware.com Date: Tue Oct 17 21:45:36 2017 -0700

Log once a day how many connections had client_ip.

This is a sanity check against any catastrophic failure of our parsing code. --- server/server.go | 2 ++ server/stats.go | 42 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+)

diff --git a/server/server.go b/server/server.go index 3c97e06..1b33661 100644 --- a/server/server.go +++ b/server/server.go @@ -269,6 +269,8 @@ func main() { log.Fatalf("error in setup: %s", err) }

+ go statsThread() + var certManager *autocert.Manager if !disableTLS { log.Printf("ACME hostnames: %q", acmeHostnames) diff --git a/server/stats.go b/server/stats.go new file mode 100644 index 0000000..1aeefb5 --- /dev/null +++ b/server/stats.go @@ -0,0 +1,42 @@ +package main + +// This code handled periodic statistics logging. +// +// The only thing it keeps track of is how many connections had the client_ip +// parameter. Write true to statsChannel to record a connection with client_ip; +// write false for without. + +import ( + "log" + "time" +) + +const ( + statsInterval = 24 * time.Hour +) + +var ( + statsChannel = make(chan bool) +) + +func statsThread() { + var numClientIP, numConnections uint64 + prevTime := time.Now() + for { + select { + case v := <-statsChannel: + if v { + numClientIP += 1 + } + numConnections += 1 + case <-time.After(statsInterval): + now := time.Now() + log.Printf("in the past %.g s, %d/%d connections had client_ip", + (now.Sub(prevTime)).Seconds(), + numClientIP, numConnections) + numClientIP = 0 + numConnections = 0 + prevTime = now + } + } +}