áúðчðть - Xakep Online
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ÞÍÈÒÛ ÊÐÅÀÒÈÔÔ ÊÎÄÈÍÃ UNIXOID ÑÖÅÍÀ [ÂÇËÎÌ] ÈÌÏËÀÍÒ PC_ZONE FERRUM<br />
ÍÜÞÑÛ<br />
Æóêè ColdFusion<br />
ÍÀØÈ ÇÀÎÊÅÀÍÑÊÈÅ ÄÐÓÇÜß ÍÅ ÐÀÇÄÅËßÞÒ ÍÀØÅÃÎ ÌÍÅÍÈß Î ÁÅÑÏËÀÒÍÛÕ ÏÐÈËÎÆÅÍÈßÕ È ÏÐÅÄÏÎ-<br />
×ÈÒÀÞÒ ÏËÀÒÍÛÅ ÐÅØÅÍÈß — ÝÒÎ Â ÊÀÊÎÉ-ÒÎ ÌÅÐÅ ßÂËßÅÒÑß ÄËß ÍÈÕ ÃÀÐÀÍÒÈÅÉ ÊÀ×ÅÑÒÂÅÍÍÎÉ<br />
ÏÎÄÄÅÐÆÊÈ. ÒÐÓÄÍÎ ÑÊÀÇÀÒÜ, ÂÈÍÎÂÀÒ ËÈ Â ÝÒÎÌ ÌÅÍÒÀËÈÒÅÒ, ÍÎ ÏÐÈ ÂÛÁÎÐÅ ÏËÀÒÔÎÐÌÛ ÄËß ÑÎÇ-<br />
ÄÀÍÈß ÑÅÐÂÅÐÍÛÕ WEB-ÏÐÈËÎÆÅÍÈÉ ÂÑÅ ÁÎËÜØÅ ÊÎÌÏÀÍÈÉ ÎÒÄÀÞÒ ÏÐÅÄÏÎ×ÒÅÍÈÅ COLDFUSION, À<br />
ÍÅ PERL ÈËÈ PHP. ÌÛ Ñ ÒÎÁÎÉ ÂÎÑÏÐÈÌÅÌ ÝÒÓ ÑÈÒÓÀÖÈÞ ÊÀÊ ÔÀÊÒ È ÍÀ×ÍÅÌ ÈÇÓ×ÀÒÜ ÂÎÏÐÎÑ ÁÅÇÎ-<br />
ÏÀÑÍÎÑÒÈ: ÂÅÄÜ ×ÅÌ ×ÀÙÅ ÂÑÒÐÅ×ÀÞÒÑß CFM-ÑÖÅÍÀÐÈÈ, ÒÅÌ ÂÀÆÍÅÅ ÄËß ÍÀÑ ÏÎÍÈÌÀÒÜ, ÊÀÊÈÅ ÈÇÚßÍÛ<br />
ÌÎÃÓÒ ÏÐÈÑÓÒÑÒÂÎÂÀÒÜ Â ÏÎÄÎÁÍÛÕ ÑÈÑÒÅÌÀÕ | Skakunof Alex (a4_perfect@mail.ru)<br />
Îñíîâíûå îøèáêè ïðîãðàììèñòîâ<br />
â cfm-ñöåíàðèÿõ<br />
[ðàçáåðåìñÿ ñ îñíîâàìè] Ïåðâûì äåëîì íóæíî ðàçîáðàòüñÿ ñ òåì,<br />
÷òî æå èç ñåáÿ ïðåäñòàâëÿåò ColdFusion. Ýòî ñåðâåð ïðèëîæåíèé (application<br />
server), êîòîðîìó âåá-ñåðâåð (÷àùå âñåãî ISS, íî âñòðå÷àþòñÿ è<br />
ñâÿçêè ñ Apache), îòäàåò íà îáðàáîòêó ñïåöèàëüíûå cfm-ôàéëû — ïðîèñõîäèò<br />
ýòî àáñîëþòíî àíàëîãè÷íî òîìó, êàê php-ôàéëû îáðàáàòûâàþòñÿ<br />
èíòåðïðåòàòîðîì ÐÍÐ. Ôàéëû .cfm ïðåäñòàâëÿþò ñîáîé êîä íà ÿçûêå<br />
CFML (ColdFusion Markup Language) — ÿçûêå ñåðâåðà ColdFusion, êîòîðûé<br />
ÿâëÿåòñÿ íåñòðîãèì ïîäìíîæåñòâîì XML: âñå îïåðàòîðû è âûðàæåíèÿ<br />
ïðåäñòàâëÿþòñÿ íàáîðîì ñïåöèàëüíûõ òýãîâ. Ïî ýòîé ïðè÷èíå cfmñöåíàðèè<br />
ïîðîé âûãëÿäÿò êàê äèçàéíåðñêèå øàáëîíû äëÿ êàêîé-òî template-ñèñòåìû<br />
:). Îäíàêî òàêîå âíåøíåå ñõîäñòâî îáìàí÷èâî: ColdFusion<br />
ïðåäîñòàâëÿåò ìàññó âîçìîæíîñòåé è ïî ôóíêöèîíàëüíîñòè åäâà ëè óñòóïàåò<br />
ëþáîìó äðóãîìó ÿçûêó ñöåíàðèåâ.<br />
Äëÿ íàñòðîéêè ñåðâåðà èñïîëüçóåòñÿ ColdFusion Administrator — ñïåöèàëüíûé<br />
web-èíñòðóìåíò, ïîçâîëÿþùèé ÷åðåç óäîáíûå äèàëîãè êîíôèãóðèðîâàòü<br />
ñèñòåìó. Áîëåå ïîäðîáíî îá ýòîì ìû ïîãîâîðèì íèæå. À ñåé÷àñ äà-<br />
âàé ïðîéäåìñÿ ïî ÿçûêó, ÷òîáû ó<br />
òåáÿ íå âîçíèêàëî ýëåìåíòàðíûõ<br />
âîïðîñîâ. Ïðåæäå âñåãî íóæíî óÿñíèòü<br />
òîò ôàêò, ÷òî âñå CFML-òýãè<br />
íà÷èíàþòñÿ ñ ïðåôèêñà cf, ïîñëå<br />
êîòîðîãî èäåò, ñîáñòâåííî, êîìàíäà.<br />
Íàïðèìåð, äâå ñàìûå èñïîëüçóåìûå<br />
â ëþáîì ÿçûêå êîìàíäû —<br />
ïðèñâîåíèå è óñëîâèå — çäåñü âûãëÿäÿò<br />
òàê:<br />
<br />
<br />
<br />
Êàê âèäíî èç ïðèìåðà, îïåðàòîðû<br />
ñðàâíåíèÿ íàïîìèíàþò Lisp'îâñ-<br />
Ïî ñâåäåíèÿì ãóãëà, â Èíòåðíåòå<br />
íàõîäèòñÿ ïðèìåðíî<br />
331 000 000 CFMñöåíàðèåâ.<br />
Òàê ÷òî ëîìàòü,<br />
êàê òû ïîíèìàåøü,<br />
åñòü ÷òî.<br />
Ýòà ñòàòüÿ íàïèñàíà èñêëþ÷èòåëüíî<br />
â îçíàêîìèòåëüíûõ<br />
öåëÿõ, ÷òîáû<br />
ïðèâëå÷ü âíèìàíèå ê âîïðîñàì<br />
áåçîïàñíîñòè CFMñöåíàðèåâ.<br />
Íà íàøåì äèñêå òû íàéäåøü<br />
ñâåæóþ trial'êó Macromedia<br />
ColdFusion, íàáîð äîêóìåíòàöèè,<br />
à òàêæå óïîìÿíóòûå<br />
â ñòàòüå ñöåíàðèè.
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