Re: [WebDNA] Some code inside a large loops fail ... but why?
This WebDNA talk-list message is from 2010
It keeps the original formatting.
numero = 104450
interpreted = N
texte = On Jan 13, 2010, at 13:48, Kenneth Grome wrote: >>>> What about the [tcpconnect] outside the loop, and the [tcpsend]=20 >>>> inside? >>>=20 >>> I tried that too but I got no response at all using that approach. =20= >>=20 >> I guess it is because the loop quickly opens an increasing number of = TCP requests which is limited by the receiving server to something like = 10. When this number is reached, the receiving server just reacts as = under a DoS attack with a number of opened sockets (SYN_RECV) that the = receiving server will just time out after several minutes. >=20 > This makes sense only when the tcpconnect is outside the loop and the = tcpsend is inside the loop. But when both are inside the loop, only one = tcp request can be done at a time -- and after each is done the replace = context is supposed to write to the db. yes, but if nothing comes back, then nothing is written into the db = because the [append] will not wait for a result, and another loop starts = immediately... Also, i a not sure about the [replace append=3DT&db=3Ddatabase.db&...] = code? chris
Associated Messages, from the most recent to the oldest:
On Jan 13, 2010, at 13:48, Kenneth Grome wrote: >>>> What about the
[tcpconnect] outside the loop, and the
[tcpsend]=20 >>>> inside? >>>=20 >>> I tried that too but I got no response at all using that approach. =20= >>=20 >> I guess it is because the loop quickly opens an increasing number of = TCP requests which is limited by the receiving server to something like = 10. When this number is reached, the receiving server just reacts as = under a DoS attack with a number of opened sockets (SYN_RECV) that the = receiving server will just time out after several minutes. >=20 > This makes sense only when the tcpconnect is outside the loop and the = tcpsend is inside the loop. But when both are inside the loop, only one = tcp request can be done at a time -- and after each is done the replace = context is supposed to write to the db. yes, but if nothing comes back, then nothing is written into the db = because the
[append] will not wait for a result, and another loop starts = immediately... Also, i a not sure about the [replace append=3DT&db=3Ddatabase.db&...] = code? chris
christophe.billiottet@webdna.us
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