On 12/03/2011 17:15, Stan Hoeppner wrote: > Wietse Venema put forth on 3/12/2011 8:43 AM: >> Stan Hoeppner: >>> It appears I did understand Giovanni's need correctly. He should be >>> able to use Sahil's checkdbl.pl daemon with some modifications. He'd >>> simply check that X-custom-header exists. If it doesn't, >> Wietse: >>> header_checks can't detect missing headers. >> Stan Hoeppner: >> Postfix is table driven, meaning it has table-driven mechanisms >> such as header_checks or aliases, and it has table lookup mechanisms >> such as hash and pcre. > Ok, I think I found my error now that you reminded me exactly how > header_checks works. :( > >> This is possible because table lookup is based on a simple (key, >> value) interface, and because the same interface can be used with >> all table mechanisms: hash, btree, pcre, cidr, tcp, ldap, *sql. >> >> - The key is the search string. >> >> This key either used "as is" with hash, btree, pcre, cidr, tcp; >> or it is embedded in some blob as with ldap, *sql, but that >> happens under the universal (key, value) interface level, and is >> invisible for table-driven mechanisms header_checks or aliases. >> >> - The value is the result or an error (not found, database error). >> >> So yes, you can implement counters in the code that receives the >> query, but there exists no query that will retrieve that counter, >> or that will reset it. Again, Postfix table driven mechanisms must >> use the same table lookup interface regardless of the underlying >> table implementation, or else the whole thing is worthless. > Yep, I found my error. (slouches in chair) I had confused the SMTP > access policy delegation protocol sending a blank line to signal the end > of the request with header_checks behavior when using a TCP server. I > was using Sahil's header_checks TCP server daemon as a reference, and > thinking of how relatively easy it should be to adapt it, but I had the > policy protocol in mind for passing the data, instead of header_checks. > I guess I was suffering mind lock, thinking of how Giovanni's need > could be addressed by an external daemon, and lost track of which > Postfix mechanism needed to be used to pass the relevant information to it. > Therefore, the only solution is to use a miltet, right?
Do you know a simple milter (write in perl or python) that i can use as example for develop my milter?
