计算机 外文翻译 外文文献 英文文献及译文30 高级编程Word文档下载推荐.docx

计算机 外文翻译 外文文献 英文文献及译文30 高级编程Word文档下载推荐.docx

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.HTMLisabroad-basedstandardgeneralmarkuplanguage（StandardGeneralizedMakeupLanguage,SGML）markuplanguage.SGMLisadescriptionlanguage,itsownwebsiteisnottobeusedforcreatingthelanguage.HTMLfromsimplelanguage,theincreasingnumberofadditionalfeatures,SotodaytheformationoftheHTMLversion4.0.Thesenewpropertiesprovideamoreflexibletextfontstyles（suchas"

FONT"

）,andandtheoutputpagelayoutmorecontrol（suchasWindowandframe）.

Earlywebsiteisthelackofdynamiccontent.Justabeginning,thisisnotaproblembecauseTHLMtothedevelopmentofthecomputer,networkandoperatingsystembetweendisplayandtransmissionofinformation（inparticularthetechnicalandscientificinformation）.ThisstandardizeddocumentisonlyasimpletextandmarkingsTheimagesandothernon-textcontentinaseparatedocumentstorage,theycanfreelyvariousnetworktransmission.Inaddition,theformatoftheinformationisfixed,anditsconstituentelementsisthemeaningoftheTHLMdefinitiongood.Fora"

reading"

orbrowserapplications,usinganyprogramminglanguageonanyplatformoroperatingsystemisrelativelyeasiertoachieve.

Aslongastheestablishmentoftheseinformationwebsite,textdocumentsandimagesthroughtheWebserverapplicationdeliverytousers,WebserverapplicationssimplyreadfromthediskandputtheiroutputintothenetworktothecorrecttransmissionHTTPagreement.Theclientortheclient,browserreceivingandtransmittingtheinformationflow,andtoswitchtoshowthepages.

HTMLandHTTPadditiontocross-platformproperties,itsmainstrengthsisitsdocumentationcanincludethecontentsoftherelevantinformation,theauthorexpressedthedesirepattern.Itcanbereadapplicationsandnotnecessarilyshow:

forexample,theblindcanusespecialproceduresithasbecomeavoice.Similarly,itscontentswillshowspecialwaytothosepooreyesightorotherdefectsiteasierforavisit.Therefore,Technologyindustryoften"

useragent"

（useragent）toreplacethegenericterm"

browser"

（browers）.

Newtypesoffiles,especiallythosedesignedtoallowtheimportationofpagesofinformationonadocument（forexample,HTML"

PUNIT"

thewindow-Control）,adevelopmentwhichcanbereadtoanduseofinformationapplicationsinevitable.Obviously,thetransferfromotherapplicationsobtained,inparticular,aspecifictypeofthecontentofthedatabase,theneedforanewapproach.Eachonebasedontheneedtorewritethetextofthepages,providingreal-timestrongmessageiscertainlynotanidealsolution.

Webserversforexample,provideaninterfacesothatotherapplicationscanbelinkedwithacommoninterfacethroughthismethod,Customizationoftheexecutablecanreceivefromtheclient'

sinformation,includingthroughhyperlinksorclickonthebrowsertypeuniformresourcelocators（URL）ofthedetailsoftherequestpages.Applicationproceduresforclientrequeststogeneratethecorrespondingresponses,butnotfromtheserverdiskreadtextordocumentmarkers.

Theseearlymethodsfromthebeginning,andgraduallyformacompleteseriesofmethodstocreatedynamicwebsiteinresponsetouserrequestsorinformationchanges.Applicationproceduresfortheseinterfacesarestillinuse,wasknownastheCommonGatewayInterface（CommonGatewaInterface,CGI）,Thisisaavailableinanylanguage（suchasC）toachievethestandard.Itarisesfromtheuseofthosecgi-bindirectoryapplication（here,"

b,in"

representsthebinarycode,insteadoftext）.

Earlyapplicationsarecompiledaftertheprocedure,usuallyinCorC++preparation.However,thisnaturallyknowtheCprogramminglanguage,Whenevertherightproceduresanddoverylittlewritingormarkingsonthechanges,wemustrecompile,re-generateexecutablefiles,whichlimitstheCandGIusedynamicpages.Instead,thedevelopmentofascriptinglanguageusedtocreateWebpages,Suchlanguageisusefulsummaryandreportlanguage（PracticalExtractionandReportingLanguage）,orreferredtoasPerlItallowsinformationtothefoundersofaverysimplifiedsimilartoCorC++languagecode.

Perlscript,it"

reads"

textandmarkingsusestandardinput（sintd）andthestandardoutput（studot）functionthroughtheCandGI.WebserverlinksGeneraloutputtothebrowser.Per•bWestillisapopularlanguage,particularlyintheUN-basedX-orLIinuxsystems.However,thislanguagecapturesupisnotveryeasy.especiallyforthosewhoarenotCorC++languagebasedontheWebespeciallydevelopers.Now,somenewscriptinglanguageemerged,andmakethewebsitemoreeasily.Wemainlylookathowtheyenabledeveloperstoworkmoreeasily.

1.1Server-sidescriptingtechnology

Fortheserver-sidescriptingneedssometypeofintermediateapplications,orplug-inproceduretoconnect.Itmustbeabletoaccepttherequestofusers,readandexplainedtotheappropriateserverbasedonthescriptfile,andthencreatetheoutputpages,Wealsotransmittedtotheserver,whereasaresponsesenttotheclient.Insomecases,thistaskisdividedintotwoparts:

anapplicationorplug-inprocedureswiththeWebcommunicationbetweentheserver（usuallyCthroughGI）.Anotherdealtwiththeinterpretationandimplementationofthescript.ThisisPSAofthesituation,thescriptengineusedinothercircumstancesthesame.Perlisapopularserver-sidescriptinglanguage,butnowtherearealotofotherlanguages.IntheUNandonI-Linuxsystem,AnewcalledPHP（PersonalHomePage）thelanguageisbecomingincreasinglypopular.Somelanguageisthegoalofsomespecifictypesofusers,Forexample,TCLisascientificenvironmentinthecomplexarithmeticsimplisticlanguage.

1.2Microsoft'

stechnologytocreatedynamicpages

WithMicrosoftWindowsNT3.51launchedtheirWebserversoftwareFAQ,InformationServer（IIS1.0.ThisisoneofmanyfunctionsofacertainstandardThesoftware,itsupportsCG.I.ButMicrosoftalsooffersaninterface,allowingtheuseofCandC++languagecompiler,suchasgeneratingexecutablefiles,makeoperationsmoreefficient.ThisisInternetServerApplicationProgrammingInterface（InternetServerApplicationProgrammingInterface,ISAPI）.ItcanprovidethantraditionalPerlenginesandothertechnology-dependentstindandstodutbroaderWebservertovisit.SincethenMicrosoftandotherthirdpartydevelopersthroughtheintroductionofmanyAPSconnecttotheSsoftwareapplication,ThisiswhyAPScanconnecttotheIIS,aswellasotherMicrosoftserverDynamicTechnology.

APSinthepast,themostwidelyusedisInetternDatabaseConnectivity（InternetDatabaseCo.nnector.IPC）.ASPWebdeveloperstouseMicrosoft'

splatformopenedupanewvista,Thisenablesthedatainthedatabasetocreatedynamicwebeasier.Inparticular,ithasintroducedatemplate（template）,whichincludesaninsertwithadatabasequerytotheresultsofthetextandmarkingthetemplatefiles.

Chapter2JavaScript

2.1what’sJavaScript

JavaScriptisusedinmillionsofWebpagestoimprovethedesign,validateforms,detectbrowsers,createcookies,andmuchmore.JavaScriptisthemostpopularscriptinglanguageontheinternet,andworksinallmajorbrowsers,suchasInternetExplorer,Mozilla,Firefox,Netscape,Opera.Beforeyoucontinueyoushouldhaveabasicunderstandingofthefollowing:

·

JavaScriptwasdesignedtoaddinteractivitytoHTMLpages

JavaScriptisascriptinglanguage（ascriptinglanguageisalightweightprogramminglanguage）

AJavaScriptconsistsoflinesofexecutablecomputercode

AJavaScriptisusuallyembeddeddirectlyintoHTMLpages

JavaScriptisaninterpretedlanguage（meansthatscriptsexecutewithoutpreliminarycompilation）

EveryonecanuseJavaScriptwithoutpurchasingalicense

JavaScriptgivesHTMLdesignersaprogrammingtool–HTMLauthorsarenormallynotprogrammers,butJavaScriptisascriptinglanguagewithaverysimplesyntax!

Almostanyonecanputsmall“snippets”ofcodeintotheirHTMLpages

JavaScriptcanputdynamictextintoanHTMLpage–AJavaScriptstatementlikethis:

document.write（”<

h1>

”+name+“<

/h1>

”）canwriteavariabletextintoanHTMLpage

JavaScriptcanreacttoevents–AJavaScriptcanbesettoexecutewhensomethinghappens,likewhenapagehasfinishedloadingorwhenauserclicksonanHTMLelement

JavaScriptcanbeusedtovalidatedata–AJavaScriptcanbeusedtovalidateformdatabeforeitissubmittedtoaserver,thiswillsavetheserverfromextraprocessing

JavaScriptcanbeusedtodetectthevisitor’sbrowser–AJavaScriptcanbeusedtodetectthevisitor’sbrowser,and–dependingonthebrowser–loadanotherpagespecificallydesignedforthatbrowser

JavaScriptcanbeusedtocreatecookies–AJavaScriptcanbeusedtostoreandretrieveinformationonthevisitor’scomput