Hello, This is not new fact, AV containing Network layer filtering may have bad impact over network performances and also can change data content on-the-fly (especially on HTTP/POP/SMTP protocols).
But take care that deactivating is sometimes not enought, depending AV the way they deactivate is not by unloading Network Filter but just turning it into "don't filter anything" but data are still going thru the filter and this may still have an impact. regards. LB> Resolved: The issue came from AVAST antivirus, which is altering the connection content in some way. LB> When Avast is deactivated: no more error LB> When Avast agent are activated: LB> - some tcp packets get altered, leading to unstable state in ICS http server post request processing LB> - some connections are dropped, leading to 10061 error, when multiple connections are open in parallel threads LB> Avast version was: 8.0.1489. Updated to latest version (8.0.1497) with same issue! LB> The issue is systematically reproducible. LB> Glad that the issue was not in ICS code, as I have strong expectations on it! LB> Be aware that even if not the responsibility of ICS code, Avast can block or alter connection and trigger invalid states on server side, which is annoying as it is widely spreaded LB> Thanks & regards, LB> Laurent LB> ________________________________ LB> De : François Piette <francois.pie...@skynet.be> LB> À : 'ICS support mailing' <twsocket@lists.elists.org> LB> Envoyé le : Samedi 12 octobre 2013 11h01 LB> Objet : Re: [twsocket] Post data lost LB> Hello Laurent, LB> As far as I can see, your code is working properly. Client always display "NNN>> Request OK with answer: 20" with NNN being the request number. LB> Server always display: LB> PostDocument: NNN LB> Before answer: PostDocument=NNN PostedData=NNN-1 LB> PostedData: NNN LB> Having NNN the request number. LB> It also display "Breakpoint on lost data here!" for all requests except the LB> first. This is normal behavior of your code since you display this message LB> if OTADeltaCount is > 1 and you only increment OTADeltaCount global LB> variable. Btw: You should not use global variable. LB> I compiled your application using XE5 and ICS-V8 released (not using the LB> copy of ICS files you sent). LB> -- LB> francois.pie...@overbyte.be LB> Embarcadero MVP LB> http://www.overbyte.be LB> http://francois-piette.blogspot.com LB> -----Message d'origine----- LB> De : TWSocket [mailto:twsocket-boun...@lists.elists.org] De la part de LB> Laurent Breysse LB> Envoyé : vendredi 11 octobre 2013 17:18 À : tw >>> ICS support mailing LB> Objet : [twsocket] Post data lost LB> Hello, LB> When testing my webservice I saw that POST data could be lost: the LB> OnPostedData handler of the http server component is never called, despite LB> the hgAcceptData set in OnPostDocument. LB> I have reproduced this issue with a simple http server, based on the WebServ LB> sample The use case: repeated sequential posts sent with a indy client LB> component, with a basic query string (56 bytes long) Most POST are correctly LB> handled, but some are simply dropped. LB> In ICS code, the issue leads to the THttpConnection.ConnectionDataSent LB> method: LB> on line 4565 (v8 gold release), FState is reset to hcRequest On the LB> following line, the comment { no stream usually means just a header string LB> has been sent } is wrong in this case, a querystring has been sent. FDocSize LB> equals 0 at this time. LB> Next, in THttpConnection.ParseRequest, the FMethod is then initialized with LB> the content of the query string (the above 56 bytes) LB> I'm new to ICS so I was not able to push further the analysis. LB> No clue if this a bug, I could simply provide sample code to reproduce the LB> issue. LB> Any advise welcome, LB> Regards, LB> Laurent LB> -- LB> To unsubscribe or change your settings for TWSocket mailing list please goto LB> http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket LB> Visit our website at http://www.overbyte.be LB> -- LB> To unsubscribe or change your settings for TWSocket mailing list LB> please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket LB> Visit our website at http://www.overbyte.be -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
