Hi Willy, thanks for your answer, it works perfectly, thanks!
Jose On Sun, Aug 9, 2015 at 4:55 AM, Willy Tarreau <w...@1wt.eu> wrote: > Hi Jose, > > On Fri, Aug 07, 2015 at 01:28:13PM -0400, Jose Nunez wrote: > > Hi, > > > > I need to express something similar to this: > > > > http-request set-header X-REQUEST-START t=%[Ts]%[ms]000 > > > > (to append three "0"s at the end of the timestamp with milliseconds). > > > > I have tried with other ways to append the three "0"s at the end: > > > > http-request set-header X-REQUEST-START t=%Ts%[ms]\x30\x30\x30 > > > > and > > > > http-request set-header X-REQUEST-START t=%Ts%ms\x30\x30\x30 > > > > and no avail either. > > You've met the limits of the log format which is not a language and > which requires some delimiters to be detected. Unfortunately it doesn't > have any delimiter which doesn't appear in the output. I found a way to > abuse it using %[] to mark a new word (since %[] detects the end of the > current block using the closing bracket). Using just "%[]" emits a warning > and does exactly what you want. A cleaner method in 1.6 consists in > emitting > an empty string as a delimitor : %[str()]. In 1.5, there is no str(), but > you can use %[env()] which will retrieve the contents of the environment > variable with no name, it doesn't exist so it returns an empty string. Yes > I know that's ugly, but the log format has gone far beyond its design goals > already! > > Thus it will give you this in 1.5 : > > http-request set-header X-REQUEST-START t=%Ts%ms%[env()]000 > > In 1.6 you can also do that : > > http-request set-header X-REQUEST-START t=%Ts%ms%[str(000)] > > Also, please note that what you're doing above only works because %ms is > left-padded with zeroes. I'm not seeing this documented anywhere though. > > Willy > >
