Just to make it clear that my answer is to solve the problem similar to what you mentioned in the link w.r.t mqtt. If you problem is different from that then it might not work.
On Tue, Apr 25, 2017 at 10:59 PM, Swapnil Dubey <swapnildube...@gmail.com> wrote: > Hi Christian, > > I had the similar requirement and I had to add the following statement in > order to make it work. I have put comment on the top of each statement. > > *# Acl to make haproxy wait till enough information is received from > client to intercept and route* > > * acl client_wait req_len gt 28 * > > * # Acl to match the data in the payload i.e. match the 28th byte > in the payload * > > * # and if it matches hex 32 (ascii char 2) then return success.* > > * acl last_msisdn req.payload(28,1) -m bin 32 * > > * # Delay the connection for max 10 sec to receive and inspect > the packet and match one of the ACL* > > *tcp-request inspect-delay 3s* > > *# When payload is received match for acl and accept the > connection if it matches* > > * tcp-request content accept if client_wait* > > option tcplog > > * # Use the tcp-gcp if acl rule names **last_msisdn** matches* > > * use_backend tcp-gcp if **last_msisdn* > > > *Regards,* > > *Swapnil* > > > > On Tue, Apr 25, 2017 at 10:28 PM, Christian Rohmann < > christian.rohm...@inovex.de> wrote: > >> Hello haproxy users! >> >> I am trying to get my head around the feature to capture arbitrary >> tcp-request content. >> (I've already found a previous thread - http://haproxy.formilux.narkiv >> e.com/dwcoXP7y/haproxy-with-mqtt where someone asked a something similar >> to extract data from MQTT requests) >> >> In the documentation https://cbonte.github.io/hapro >> xy-dconv/1.5/configuration.html#4.2-tcp-request%20content >> Is says that the action "capture" will allow for samples to be captured. >> In my case I want to capture a few bytes of the payload >> like it's described for acl samples at https://cbonte.github.io/hapro >> xy-dconv/1.5/configuration.html#7.3.5-req.payload . >> >> >> After some trial an error I found that config syntax: >> tcp-request content capture req.payload_lv(3,8) len 8 >> >> will at least parse correctly. But how can I access the captured bytes >> later to i.e. log them to the access log or to use them for load balancing >> rules? >> >> >> >> >> Thanks for any hints >> Regards >> >> >> Christian >> >> >> >
