{"id":37249,"date":"2019-10-31T22:16:34","date_gmt":"2019-10-31T19:16:34","guid":{"rendered":"https:\/\/prohoster.info\/blog\/ne-shutite-s-null\/"},"modified":"2019-10-31T22:16:34","modified_gmt":"2019-10-31T19:16:34","slug":"ne-shutite-s-null","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/ne-shutite-s-null","title":{"rendered":"Ne hecajte se z NULL","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Zanimljiva pri\u010da o petku dogodila se s ameri\u010dkim istra\u017eiva\u010dem sigurnosti Josephom Tartaro. Htio se istaknuti naru\u010divanjem ne samo personalizirane registarske oznake, ve\u0107 i povezivanjem s vlastitom profesijom. Prva ideja bila je igrati se s SEGFAULT-om ili ne\u010dim sli\u010dnim. No, na kraju se odlu\u010dio za oznaku NULL za svoj auto i VOID za svoju suprugu. Osjetili ste ne\u0161to \u010dudno? O tome kako je nevina \u0161ala zavr\u0161ila za njega, o jo\u0161 jednom neobi\u010dnom gospodinu Null i o pou\u010dnim gre\u0161kama prilikom provjere tipova podataka u korisni\u010dkom unosu, pro\u010ditajte u nastavku.<\/p>\n

\"Ne<\/a><\/noindex><\/p>\n

Dakle, 2016. godine na\u0161 \u0161ala\u0161 s programiranjem dobio je svoje nove zabavne registarske oznake i sigurno je s zadovoljstvom trljao ruke. \u010cak je imao nadu da \u0107e ga ovaj potez izbaviti od kaznenih prijava. Nije da je previ\u0161e kr\u0161io pravila, ali sama ideja da se na taj na\u010din prevari sustav izgledala je izuzetno zanimljiva stru\u010dnjaku za sigurnost.<\/p>\n

Problemi su po\u010deli godinu dana kasnije kada je poku\u0161ao obnoviti registraciju oznaka online. I vrlo je zbunio stranicu predvi\u0111enu za to.<\/p>\n

\"Ne
\n
\nSustav je smatrao da je unesena registarska oznaka neispravna. Programeri su negdje pogrije\u0161ili, a uneseni NULL kao tekstualna vrijednost, o\u010digledno nije bio pravilno provjeren. Gre\u0161ka nejasne tipizacije? Me\u0111utim, uspio je produ\u017eiti oznaku na godinu uz pomo\u0107 koda iz poveznice i nekako je zatim sve to zaboravio.<\/p>\n

Ipak, kako se ispostavilo, to nije bile daleko samo problemi. Dalje, pri\u010da podsje\u0107a na staru \u0161alu:<\/p>\n

Soldat usred polja poku\u0161ava nekako popraviti gusjenicu koja se odvojila od tenka. Odjednom, niotkuda se pojavljuje vila i pita:
\n \u2014 \u010cime se bavi\u0161, vojnice?
\n \u2014 Eto, trudim se.
\n \u2014 A ho\u0107e\u0161 li stvarno?
\n \u2014 (snje\u017eno) Ho\u0107u...
\nVila je mahala \u0161tapi\u0107em\u2026 I tenku se odvojila kupola.<\/p><\/blockquote>\n

\nNa za\u010detku leta 2018 je prejel zaslu\u017eeno kazen v vi\u0161ini 35 $. Lahko bi jo izpodbijal, ampak bilo je la\u017eje pla\u010dati, znesek ni bil velik. In takrat je vila zamahnila s \u010darobno palico\u2026 V njegov nabiralnik so za\u010dele prihajati kazni za nepla\u010dano parkiranje, ustavljanje na nedovoljenih mestih in druge podobne neprijetnosti. Du\u017eine in du\u017eine kazni v zneskih 37 $, 60 $, 74 $, 80\u2026 Iz popolnoma razli\u010dnih koncev Kalifornije. Na popolnoma razli\u010dnih modelih avtomobilov. Zaradi \u0161e enega nepravilnega preverjanja tipizacije se je NULL vrednost povezala z njegovimi osebnimi podatki. In vsaki\u010d, ko je \u010dastni predstavnik oblasti pozabil vnesti \u0161tevilko avtomobila v sistem ob izdaji kazni, je nagrada \u0161la na\u0161emu junaku (tukaj bi bilo smiselno kritizirati tudi razvijalce frontenda za pomanjkanje preverjanja vpisovanja enega od klju\u010dnih parametrov).<\/p>\n

V nekem trenutku je prejel dve kazni, izdani na istem mestu s \u010dasovno razliko le nekaj ur za popolnoma razli\u010dne modele avtomobilov. Za popolno sre\u010do so mu retroaktivno prispele stare kazni brez navedene \u0161tevilke. Tako mu je pripadlo celo kazni iz leta 2014, ko \u0161e ni imel te \u0161tevilke. Na koncu so mu obremenili ve\u010d kot 12.000 $ kazni.<\/p>\n

\"Ne
\n
\nKaznmi za parkiranje se je ukvarjala zasebna dru\u017eba Citation Processing Center. Seveda je Joseph stopil v stik z njimi in posku\u0161al razlo\u017eiti situacijo. Seveda je manager na telefonu prijazno zavrnil, prosil, naj jim po\u0161ljejo \u0161tevilke kvitancev, da bodo lahko razjasnili. Ampak to bi pomenilo izgubo edine fizi\u010dne kopije, ki potrjuje nepravilnost izdanih kazni. In dobro, da je ni poslal. Kasneje je opazil, da je v odprti bazi kazni, dostopni na spletu, prvotni model avtomobila zamenjan z njegovim. \u0160e en krog pogovorov z managerji, prav tako brezizgoden.<\/p>\n

Na koncu se je moral obrniti neposredno na DMV (Department of Motor Vehicles, dr\u017eavni organ, odgovoren za registracijo motornih vozil), ki mu je pomagal precej hitro zmanj\u0161ati znesek na $6262, vendar to ni re\u0161ilo za\u010detnega problema. Nova kazen je \u0161e naprej prihajala. Na datum pisanja izvirnega \u010dlanka v Wired je bilo nepla\u010danih 2 kazni v skupnem znesku $140. Kar je najhuj\u0161e, DMV mu zavra\u010da podalj\u0161anje registracije za \u0161e eno leto, dokler kazni niso poravnane. Poleg tega ni povsem jasno, kam iti in komu dati po glavici, da bi to te\u017eavo re\u0161ili. DMV navaja, da njihov sistem pravilno prepoznava njegove \u0161tevilke in se zaveda absurdnosti situacije. Vendar pa z vpra\u0161anji parkiranja upravljajo lokalna oblast, na katere niso mogli vplivati. Torej, zgodba bi se \u0161e lahko nadaljevala. \u0160ala ni uspela.<\/p>\n

G. Null<\/h2>\n

\n\u0160e bolj nesre\u010den je Christopher Null. U\u010dinkoma ne more zanositi s tak\u0161no priimkom. Medtem ko ima Joseph Tartaro te\u017eave samo s kaznimi in to le pribli\u017eno zadnje leto, se Christopher nenehno poglablja v morje trpljenja, ki se razvija skupaj z napredkom digitalnih tehnologij.<\/p>\n

\u0160e posebej ga moti \u0161iroko razvito koncept MVP (minimum viable product, minimalni \u017eivljenjski produkt), ki se v nekaterih primerih neposredno ujema s konceptom 'hitr hiter, in v produkcijo'.<\/p>\n

\u010ceprav odmislimo vse \u0161ale \u0161olske ravni na ra\u010dun njegovega priimka, pa tudi obto\u017ebe, da na tak na\u010din \u017eeli pritegniti pozornost (kar je dobra strategija, \u010de si tehni\u010dni novinar, kakr\u0161en je Christopher), se pojavijo \u010dudnosti pri delu z nekaterimi spletnimi stranmi in aplikacijami.<\/p>\n

Po trditvah Christopherja ve\u010dina spletnih strani pravilno obdeluje priimek Null. Nekatere pa poro\u010dajo, da polje ne more biti prazno, ali da gre za rezervirano besedo. V redkih primerih aplikacije preprosto odpovejo. Kar je zanimivo, je to, da po njegovih opa\u017eanjih, \u010dim ve\u010dja podjetja stojijo za aplikacijo ali spletno stranjo, tem ve\u010d te\u017eav bo z njegovim priimkom.<\/p>\n

Njegova filtracija podataka koja odbacuje Null iz ve\u0107 pohranjenih podataka posebno je impresivna. Tako nekad primi poruke na adresu Media LLC (dok je naziv kompanije Null Media LLC), a ponekad ga u spam porukama jednostavno oslovljavaju s \u201egospodine\u201c. \u010cak je morao razviti zaobilazne manevre. Na primer, stavljao je drugo ime ili inicijal u jedno polje s prezimenom ili jednostavno dodavao ta\u010dku na kraju. Me\u0111utim, ponekad se tvrdoglavost sistema \u010dini nepobedivom.<\/p>\n

Tako je Bank of America odlu\u010dila potpuno odbiti primati njegov e-mail null@nullmedia.com. Njihov sistem jednostavno nije prihvatao null u korisni\u010dkom delu adrese, pa je \u010dak morao napraviti nadimak info@ posebno za banku. Me\u0111utim, bankarski softver se aktivno razvijao, i nakon nekoliko godina\u2026 prestao je primati null \u010dak i kao deo domena. Beda mu je bila da otvori obi\u010dan nalog na Gmailu za posebno tvrdoglave. Tako\u0111e sadr\u017ei null, ali ne na po\u010detku korisni\u010dkog imena.<\/p>\n

Da li ste se susretali s nekim kuriozitetima prilikom obrade sistemskih vrednosti? Podelite u komentarima.<\/p>\n

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\n
Izvor: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u043e\u0441\u0442\u043e\u0439\u043d\u0430\u044f \u043f\u044f\u0442\u043d\u0438\u0446\u044b \u0438\u0441\u0442\u043e\u0440\u0438\u044f \u043f\u0440\u0438\u043a\u043b\u044e\u0447\u0438\u043b\u0430\u0441\u044c \u0441 \u0430\u043c\u0435\u0440\u0438\u043a\u0430\u043d\u0441\u043a\u0438\u043c \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c \u0432 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0414\u0436\u043e\u0437\u0435\u0444\u043e\u043c \u0422\u0430\u0440\u0442\u0430\u0440\u043e (Joseph Tartaro). \u0417\u0430\u0445\u043e\u0442\u0435\u043b\u043e\u0441\u044c \u0435\u043c\u0443 \u0432\u044b\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f, \u0437\u0430\u043a\u0430\u0437\u0430\u0432 \u043d\u0435 \u043f\u0440\u043e\u0441\u0442\u043e \u0438\u043d\u0434\u0438\u0432\u0438\u0434\u0443\u0430\u043b\u044c\u043d\u044b\u0439 \u043d\u043e\u043c\u0435\u0440 \u043d\u0430 \u0430\u0432\u0442\u043e, \u043d\u043e \u0438 \u0441\u0432\u044f\u0437\u0430\u0432 \u0435\u0433\u043e \u0441\u043e \u0441\u0432\u043e\u0438\u043c \u0440\u0435\u043c\u0435\u0441\u043b\u043e\u043c. \u041f\u0435\u0440\u0432\u043e\u0439 \u043c\u044b\u0441\u043b\u044c\u044e \u0431\u044b\u043b\u043e \u043f\u043e\u0438\u0433\u0440\u0430\u0442\u044c\u0441\u044f \u0441 SEGFAULT \u0438\u043b\u0438 \u0447\u0435\u043c-\u0442\u043e \u0432\u0440\u043e\u0434\u0435 \u044d\u0442\u043e\u0433\u043e. \u041d\u043e \u0432 \u0438\u0442\u043e\u0433\u0435 \u043e\u043d \u043e\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u043b\u0441\u044f \u043d\u0430 \u043d\u043e\u043c\u0435\u0440\u0435 NULL \u0434\u043b\u044f \u0441\u0432\u043e\u0435\u0439 \u043c\u0430\u0448\u0438\u043d\u044b \u0438 VOID \u0434\u043b\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":27935,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-37249","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Ne pravite \u0161ale s NULL | ProHoster","description":"Zanimljiva pri\u010da iz petka dogodila se ameri\u010dkom istra\u017eiva\u010du u oblasti bezbednosti Josephu 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