Letmegototheversionoffmywebsitethat's hostedheroicOoh, righthereonwhen I clickedthesamebuttonsunupsigningwithTwitter.
I gotthiserrorsocialnetworkloggingfailure.
Andthefunnythingwas, I wasrunningexactlythesamecodeformylocalserveraswellasonheroin.
Sowhat's happeninghere?
Okay, sothefirstthing I thoughtwhen I gotthisairisthattheobviousdifferencebetweenthesetwosituationsistheeuros.
So I thoughtmaybe I setupsomethingincorrectlyonTwitter's developerwebsiteinregardstothatyearelse.
Andthatactuallybringsmetothefirsttip I wantedtotalkaboutfordebuggingingeneral.
Onthatistocomeupwith a hypothesisontestiton, comeupwithanotherhypothesisontestthatsoyouneedto, youknow, reallythinklike a scientistwhenyourdebugginglike I saidtheinitialhypothesis I hadforthisparticularbugwasthatmaybe I setupsomethingincorrectlyonTwitter's developerwebsite.
So I checkediton.
I checked.
Youknow, thissectioninparticular.
Callbackyour L.
I checked.
Ifit's httpsorhttp, forexample, I triedboth, butnoneofthosethingsworked.
Soatthatpoint, I wantedtocomeoutwithanotherhypothesis.
But I wassortofoutofideas, so I decidedtofirstlookintothecodetotrytoseeyouknow, thecauseofthebug.
Butbeforedoingthat, I wantedto, youknow, reproducethebuglocally, oratleastreproducesomethingsimilartothebuglocally.
Andthat's actuallymysecondtipfordebugging.
I thinkwe'reproducingThebuglocallyisimportantbecause, youknow, tryingtofindthecauseof a bugusuallytakes a lotoftrialsanderrorsyouneed.
Thiosometimesplayaroundwiththecoat, tooon.
Ifyoudoitwiththeserver, youmighttake a lotoftimejustcommunicatingwiththeserver.
So, ideally, whenit's possibleandwhenit's convenient, usedtotrytoreproducethesamebugor a similarbuglocally, andtheyanalyzeitthere.
Firstoninthisparticularcase, I justwentbackThioTwitter's developerwebsite.
Andthen I actuallydeletedoneofthecallback.
Youorelse, youknow, theoneforthelocalserveronwhen I didthat.
Andwhen I triedthesamethingagainonthelocalserver, I actuallygotthesameerror.
Sothisisnotnecessarilythesamebug.
But I thought, youknow, once I analyzedthisparticularerror, I'llbeabletouse, youknow, theeastsite I cangetfromthatanalysistofindthecauseoftheoars.
No, buck.
Sothat's exactlywhat I did, Aunt.
Toanalyzewth e errorthat I justcreatedallmylocalsilver.
Morecarefully, I startedreadingintothesourcecode, andthat's actuallymythirdtrip.
Toreadthesourcecodecarefullyandthenplayaroundwithitonthisprocesswasactuallynotthatsimpleformebecause I wasusingthisprettybigopensourcelibrarycalledJungleAlloff.
Anyway, I startedlookingthroughthiscodebasesomewhereon I foundthisdirectory.
Ah, thisisPorter.
So I thought, youknow, thismustbetherelevantdirectoryherebecausewe'reusing a TwitterLogginson, youknow, forexample, I foundview.
Stop.
I filehereinthetraitordirectory, and I thoughtitwasrelevant.
Sowhat I didwas I copiedthisfoulandthenpasteditlocallytooverridesomeofthefunctionsinthisfile.
Andi, I actuallydidthesamethingforanotherfileon.
I calleditoffofyou.
Stop I becausethiswasviewsDuPuywithintheOSSdirectoryandthen, youknow, lookingthroughthesetwofiles, I thought, Okay, thisviewfunctionrighthereinoffusemustbetheviewthat's calledwhenthisgirlisopenedbytheuser.
Thatwassortofmyhypothesisontotestthat I decidedto, youknow, putsomeprintsstatementshere.
OK, so I lookedintothatfunctionandthen I keptrepeatingthesamepattern.
Basicallyanalyzethecodebyusing a bunchofprintsstatementsandthentrytounderstandwhat's thenextfunctionthat I shouldlookat.
Andtheneventually I gottodysfunctioncalledGetrequeststoken.
So I keptdoingbasicallythesamethingaswhat I didearlierforthisfunction.
Youknow, I added a fewmoreprintsdemons, andthen I decidedtofocusonthisparticularvariablecalled a response, becauseitlookslike a responsethatwegetfromTwitterwhenwetrytodotwitterlogin.
Soweneedtoexamineit, youknow, a littlebitmorecarefully.
Andthatactuallybringsmetomyfifthtipfordebuggingonthatistouse a d buggereffectively.
Sojustincaseyoudon't knowwhat a deburgeris, it's a waytorunthiscodeandthenstopitwhereveryouwant.
I examinedthecodemorecarefully, sohere I can d'oh!
ImportPDPpythondebunkerandthen p b thatsettracethiswayweshouldbeabletoWhenwewerefreshthatpagethatwaysoearlierWeshouldbeabletostopitrighthere.
Sointerminal, whenyou'reinthe d buggeryouissuedseesomethinglikethis P p p t b.
Andthenthereare a lotofdifferentcommandshere, buttheonlycommandthatmattersAh, hereispeak, whichyoucanusetoprintanythingyouwannaprint.
Soifyou d'oh p response, youshouldbeabletoprintthatonifyou d'ohresponsethatdickedthatkeysyoubeabletoseeyouknowwhatvariablesthisobjecttaskonthereis a bunchofstuffhere, butactuallytheonlyonethat's importantiscontent.
Thisiswhyyousee, I getcallbackeuronotapprovedforthisclientapplication, whichactuallymakessensebecause, youknow, I gotridoftheeuroforthelocalapplication.