網上賓館訂房管理系統(tǒng) 外文文獻和翻譯

本科畢業(yè)設計外文文獻翻譯二O一O年六月學生姓名XXX學院信息工程學院系別計算機系專業(yè)軟件工程班級軟件06指導教師XXX講師A1A0A2A3A5A7A7A7A1A8A5A7A7A7A4A4A4A6A9A10A11A12A13A14A9A15A16A17A18A18A19A20A211THEHTTPREQUEST/RESPONSEMODELJAVASERVERPAGES,THIRDEDITIONAUTHORA22HANSBERGSTEN1REQUESTSINDETAILLETSTAKEACLOSERLOOKATREQUESTSAUSERSENDSAREQUESTTOTHESERVERBYCLICKINGALINKONAWEBPAGE,SUBMITTINGAFORM,ORTYPINGINAWEBPAGEADDRESSINTHEBROWSERSADDRESSFIELDTOSENDAREQUEST,THEBROWSERNEEDSTOKNOWWHICHSERVERTOTALKTOANDWHICHRESOURCETOASKFORTHISINFORMATIONISSPECIFIEDBYANHTTPUNIFORMRESOURCELOCATORURLHTTP/WWWGEFIONSOFTWARECOM/INDEXHTMLTHEFIRSTPARTOFTHEURLSHOWNSPECIFIESTHATTHEREQUESTISMADEUSINGTHEHTTPPROTOCOLTHISISFOLLOWEDBYTHENAMEOFTHESERVER,INTHISCASEWWWGEFIONSOFTWARECOMTHEWEBSERVERWAITSFORREQUESTSTOCOMEINONASPECIFICTCP/IPPORTPORTNUMBER80ISTHESTANDARDPORTFORHTTPREQUESTSIFTHEWEBSERVERUSESANOTHERPORT,THEURLMUSTSPECIFYTHEPORTNUMBERINADDITIONTOTHESERVERNAMEFOREXAMPLEHTTP/WWWGEFIONSOFTWARECOM8080/INDEXHTMLTHISREQUESTISSENTTOASERVERTHATUSESPORT8080INSTEADOF80THELASTPARTOFTHEURL,/INDEXHTML,IDENTIFIESTHERESOURCETHATTHECLIENTISREQUESTINGAURLISACTUALLYASPECIALIZATIONOFAUNIFORMRESOURCEIDENTIFIERURI,DEFINEDINTHERFC2396SPECIFICATIONAURLIDENTIFIESARESOURCEPARTLYBYITSLOCATION,FORINSTANCETHESERVERTHATCONTAINSTHERESOURCEANOTHERTYPEOFURIISAUNIFORMRESOURCENAMEURN,WHICHISAGLOBALLYUNIQUEIDENTIFIERTHATISVALIDNOMATTERWHERETHERESOURCEISLOCATEDHTTPDEALSONLYWITHTHEURLVARIETYTHETERMSURIANDURLAREOFTENUSEDINTERCHANGEABLE,ANDUNFORTUNATELY,THEYHAVESLIGHTLYDIFFERENTDEFINITIONSINDIFFERENTSPECIFICATIONSIMTRYINGTOUSETHETERMSASDEFINEDBYTHEHTTP/11SPECIFICATIONRFC2616,WHICHISPRETTYCLOSETOHOWTHEYAREALSOUSEDINTHESERVLETANDJSPSPECIFICATIONSHENCE,IUSETHETERMURLONLYWHENTHEURIMUSTSTARTWITHHTTPORHTTPS,FORHTTPOVERANENCRYPTEDCONNECTIONFOLLOWEDBYASERVERNAMEANDPOSSIBLYAPORTNUMBER,ASINTHEPREVIOUSEXAMPLESIUSEURIASAGENERICTERMFORANYSTRINGTHATIDENTIFIESARESOURCE,WHERETHELOCATIONCANBEDEDUCEDFROMTHECONTEXTANDISNTNECESSARILYPARTOFTHEA23A23A23A6A9A10A11A12A13A14A9A15A16A17A18A18A19A20A212URIFOREXAMPLE,WHENTHEREQUESTHASBEENDELIVEREDTOTHESERVER,THELOCATIONISAGIVEN,ANDONLYTHERESOURCEIDENTIFIERISIMPORTANTTHEBROWSERUSESTHEURLINFORMATIONTOCREATETHEREQUESTMESSAGEITSENDSTOTHESPECIFIEDSERVERUSINGTHESPECIFIEDPROTOCOLANHTTPREQUESTMESSAGECONSISTSOFTHREETHINGSAREQUESTLINE,REQUESTHEADERS,ANDPOSSIBLYAREQUESTBODYTHEREQUESTLINESTARTSWITHTHEREQUESTMETHODNAME,FOLLOWEDBYARESOURCEIDENTIFIERANDTHEPROTOCOLVERSIONUSEDBYTHEBROWSERGET/INDEXHTMLHTTP/11THEMOSTCOMMONLYUSEDREQUESTMETHODISNAMEDGETASTHENAMEIMPLIES,AGETREQUESTISUSEDTORETRIEVEARESOURCEFROMTHESERVERITSTHEDEFAULTREQUESTMETHOD,SOIFYOUTYPEAURLINTHEBROWSERSADDRESSFIELD,ORCLICKONALINK,THEREQUESTISSENTASAGETREQUESTTOTHESERVERTHEREQUESTHEADERSPROVIDEADDITIONALINFORMATIONTHESERVERMAYUSETOPROCESSTHEREQUESTTHEMESSAGEBODYISINCLUDEDONLYINSOMETYPESOFREQUESTS,LIKETHEPOSTREQUESTDISCUSSEDLATERHERESANEXAMPLEOFAVALIDHTTPREQUESTMESSAGEGET/INDEXHTMLHTTP/11HOSTWWWGEFIONSOFTWARECOMUSERAGENTMOZILLA/50WINDOWSUWIN9X490ENUSRV102ACCEPTIMAGE/GIF,IMAGE/JPEG,IMAGE/PJPEG,IMAGE/PNG,/ACCEPTLANGUAGEENACCEPTCHARSETISO88591,UTF8THEREQUESTLINESPECIFIESTHEGETMETHODANDASKSFORTHERESOURCENAMED/INDEXHTMLTOBERETURNEDUSINGTHEHTTP/11PROTOCOLVERSIONTHEVARIOUSHEADERSPROVIDEADDITIONALINFORMATIONTHEHOSTHEADERTELLSTHESERVERTHEHOSTNAMEUSEDINTHEURLASERVERMAYHAVEMULTIPLENAMES,SOTHISINFORMATIONISUSEDTODISTINGUISHBETWEENMULTIPLEVIRTUALWEBSERVERSSHARINGTHESAMEWEBSERVERPROCESSTHEUSERAGENTHEADERCONTAINSINFORMATIONABOUTTHETYPEOFBROWSERMAKINGTHEREQUESTTHESERVERCANUSETHISTOSENDDIFFERENTTYPESOFRESPONSESTODIFFERENTTYPESOFBROWSERSFORINSTANCE,IFTHESERVERKNOWSWHETHERINTERNETEXPLORERORNETSCAPENAVIGATORA23A23A23A6A9A10A11A12A13A14A9A15A16A17A18A18A19A20A213ISUSED,ITCANSENDARESPONSETHATTAKESADVANTAGEOFEACHBROWSERSUNIQUEFEATURESITCANALSOTELLIFACLIENTOTHERTHANANHTMLBROWSERISUSED,SUCHASAWIRELESSMARKUPLANGUAGEWMLBROWSERONACELLPHONEORAPDADEVICE,ANDGENERATEANAPPROPRIATERESPONSETHEACCEPTHEADERSPROVIDEINFORMATIONABOUTTHELANGUAGESANDFILEFORMATSTHEBROWSERACCEPTSTHESEHEADERSCANBEUSEDTOADJUSTTHERESPONSETOTHECAPABILITIESOFTHEBROWSERANDTHEUSERSPREFERENCES,SUCHASUSEASUPPORTEDIMAGEFORMATANDTHEPREFERREDLANGUAGETHESEAREJUSTAFEWOFTHEHEADERSTHATCANBEINCLUDEDINAREQUESTMESSAGETHERESOURCEIDENTIFIERURIDOESNTNECESSARILYCORRESPONDTOASTATICFILEONTHESERVERITCANIDENTIFYANEXECUTABLEPROGRAM,ARECORDINADATABASE,ORPRETTYMUCHANYTHINGTHEWEBSERVERKNOWSABOUTTHATSWHYTHEGENERICTERMRESOURCEISUSEDINFACT,THERESNOWAYTOTELLIFTHE/INDEXHTMLURICORRESPONDSTOAFILEORSOMETHINGELSEITSJUSTANAMETHATMEANSSOMETHINGTOTHESERVERTHEWEBSERVERISCONFIGUREDTOMAPTHESEUNIQUENAMESTOTHEREALRESOURCES2RESPONSESINDETAILWHENTHEWEBSERVERRECEIVESTHEREQUEST,ITLOOKSATTHEURIANDDECIDES,BASEDONCONFIGURATIONINFORMATION,HOWTOHANDLEITITMAYHANDLEITINTERNALLYBYSIMPLYREADINGANHTMLFILEFROMTHEFILESYSTEM,ORITCANFORWARDTHEREQUESTTOSOMECOMPONENTTHATISRESPONSIBLEFORTHERESOURCECORRESPONDINGTOTHEURITHISCANBEAPROGRAMTHATUSESDATABASEINFORMATION,FORINSTANCE,TODYNAMICALLYGENERATEANAPPROPRIATERESPONSETOTHEBROWSERITMAKESNODIFFERENCEHOWTHEREQUESTISHANDLEDALLITCARESABOUTISGETTINGARESPONSETHERESPONSEMESSAGELOOKSSIMILARTOTHEREQUESTMESSAGEITCONSISTSOFTHREETHINGSASTATUSLINE,RESPONSEHEADERS,ANDANOPTIONALRESPONSEBODYHERESANEXAMPLEHTTP/11200OKLASTMODIFIEDMON,20DEC2002232642GMTDATETUE,11JAN2003205240GMTSTATUS200CONTENTTYPETEXT/HTMLSERVLETENGINETOMCATWEBSERVER/50CONTENTLENGTH59A23A23A23A6A9A10A11A12A13A14A9A15A16A17A18A18A19A20A214HELLOWORLDTHESTATUSLINESTARTSWITHTHENAMEOFTHEPROTOCOL,FOLLOWEDBYASTATUSCODEANDASHORTDESCRIPTIONOFTHESTATUSCODEHERETHESTATUSCODEIS200,MEANINGTHEREQUESTWASEXECUTEDSUCCESSFULLYTHERESPONSEMESSAGEHASHEADERSJUSTLIKETHEREQUESTMESSAGEINTHISEXAMPLE,THELASTMODIFIEDHEADERGIVESTHEDATEANDTIMEFORWHENTHERESOURCEWASLASTMODIFIEDTHEBROWSERCANUSETHISINFORMATIONASATIMESTAMPINALOCALCACHETHENEXTTIMETHEUSERASKSFORTHISRESOURCE,HECANASKTHESERVERTOSENDITONLYIFITSBEENUPDATEDSINCETHELASTTIMEITWASREQUESTEDTHECONTENTTYPEHEADERTELLSTHEBROWSERWHATTYPEOFRESPONSEDATATHEBODYCONTAINSANDTHECONTENTLENGTHHEADERHOWLARGEITISTHEOTHERHEADERSARESELFEXPLANATORYABLANKLINESEPARATESTHEHEADERSFROMTHEMESSAGEBODYHERETHEBODYISASIMPLEHTMLPAGEHELLOWORLDOFCOURSE,THEBODYCANCONTAINAMORECOMPLEXHTMLPAGEORANYOTHERTYPEOFCONTENTFOREXAMPLE,THEREQUESTMAYRETURNANHTMLPAGEWITHELEMENTSWHENTHEBROWSERREADSTHEFIRSTRESPONSEANDFINDSTHEELEMENTS,ITSENDSANEWREQUESTFORTHERESOURCEIDENTIFIEDBYEACHELEMENT,OFTENINPARALLELTHESERVERRETURNSONERESPONSEFOREACHIMAGEREQUEST,WITHACONTENTTYPEHEADERTELLINGWHATTYPEOFIMAGEITISFORINSTANCEIMAGE/GIFANDTHEBODYCONTAININGTHEBYTESTHATMAKEUPTHEIMAGETHEBROWSERTHENCOMBINESALLRESPONSESTORENDERTHECOMPLETEPAGE3REQUESTPARAMETERSBESIDESTHEURIANDHEADERS,AREQUESTMESSAGECANCONTAINADDITIONALINFORMATIONINTHEFORMOFPARAMETERSIFTHEURIIDENTIFIESASERVERSIDEPROGRAMFORDISPLAYINGWEATHERINFORMATION,FOREXAMPLE,REQUESTPARAMETERSCANPROVIDEINFORMATIONABOUTTHECITYTHEUSERWANTSTOSEEAFORECASTFORINANECOMMERCEAPPLICATION,THEURIMAYIDENTIFYAPROGRAMTHATA23A23A23A6A9A10A11A12A13A14A9A15A16A17A18A18A19A20A215PROCESSESORDERS,WITHTHEUSERSCUSTOMERNUMBERANDTHELISTOFITEMSTOBEPURCHASEDTRANSFERREDASPARAMETERSPARAMETERSCANBESENTINONEOFTWOWAYSTACKEDONTOTHEURIINTHEFORMOFAQUERYSTRINGORSENTASPARTOFTHEREQUESTMESSAGEBODYTHISISANEXAMPLEOFAURLWITHAQUERYSTRINGHTTP/WWWWEATHERCOM/FORECASTCITYHERMOSABEACHFORINSTANCE,AQUESTIONMARKISENCODEDAS3FWHENPARAMETERSARESENTASPARTOFTHEREQUESTBODY,THEYFOLLOWTHESAMESYNTAXURLENCODEDNAME/VALUEPAIRSSEPARATEDBYAMPERSANDS錯誤未指定書簽。4REQUESTMETHODSASDESCRIBEDEARLIER,GETISTHEMOSTCOMMONLYUSEDREQUESTMETHOD,INTENDEDTORETRIEVEARESOURCEWITHOUTCAUSINGANYTHINGELSETOHAPPENONTHESERVERTHEPOSTMETHODISALMOSTASCOMMONASGETITREQUESTSSOMEKINDOFPROCESSINGONTHESERVER,FORINSTANCE,UPDATINGADATABASEORPROCESSINGAPURCHASEORDERTHEWAYPARAMETERSARETRANSFERREDISONEOFTHEMOSTOBVIOUSDIFFERENCESBETWEENTHEGETANDPOSTREQUESTMETHODSAGETREQUESTALWAYSUSESAQUERYSTRINGTOSENDPARAMETERVALUES,WHILEAPOSTREQUESTALWAYSSENDSTHEMASPARTOFTHEBODYADDITIONALLY,ITCANSENDSOMEPARAMETERSASAQUERYSTRING,JUSTTOMAKELIFEINTERESTINGIFYOUINSERTALINKINANHTMLPAGEUSINGANELEMENT,CLICKINGONTHELINKRESULTSINAGETREQUESTBEINGSENTTOTHESERVERSINCETHEGETREQUESTUSESAQUERYSTRINGTOPASSPARAMETERS,YOUCANINCLUDEHARDCODEDPARAMETERVALUESINTHELINKURIHERMOSABEACHWEATHERFORECASTWHENYOUUSEAFORMTOSENDUSERINPUTTOTHESERVER,YOUCANSPECIFYWHETHERTOUSETHEA23A23A23A6A9A10A11A12A13A14A9A15A16A17A18A18A19A20A216GETORPOSTMETHODWITHTHEMETHODATTRIBUTE,ASSHOWNHERECITYSTATEIFTHEUSERENTERS“HERMOSABEACH“AND“CA“INTHEFORMFIELDSANDCLICKSONTHESUBMITBUTTON,THEBROWSERSENDSAREQUESTMESSAGELIKETHISTOTHESERVERPOST/FORECASTHTTP/11HOSTWWWGEFIONSOFTWARECOMUSERAGENTMOZILLA/50WINDOWSUWIN9X490ENUSRV102ACCEPTIMAGE/GIF,IMAGE/JPEG,IMAGE/PJPEG,IMAGE/PNG,/ACCEPTLANGUAGEENUSACCEPTCHARSETISO88591,UTF8CITYHERMOSABEACHTHEBROWSERWOULDHAVETOSAVEBOTHTHEURIANDTHEREQUESTMESSAGEBODYSINCEAPOSTREQUESTISINTENDEDTOPERFORMSOMEPOSSIBLYIRREVERSIBLEACTIONONTHESERVER,THEBROWSERMUSTALSOASKTHEUSERIFITSOKAYTOSENDTHEREQUESTAGAINBESIDESTHEGETANDPOSTMETHODS,HTTPSPECIFIESTHEFOLLOWINGMETHODSOPTIONSTHEOPTIONSMETHODISUSEDTOFINDOUTWHATOPTIONSEG,METHODSASERVERORARESOURCEOFFERSHEADA23A23A23A6A9A10A11A12A13A14A9A15A16A17A18A18A19A20A217THEHEADMETHODISUSEDTOGETARESPONSEWITHALLHEADERSGENERATEDBYAGETREQUESTBUTWITHOUTTHEBODYITCANMAKESUREALINKISVALIDORTOSEEWHENARESOURCEWASLASTMODIFIEDPUTTHEPUTMETHODISUSEDTOSTORETHEMESSAGEBODYCONTENTONTHESERVERASARESOURCEIDENTIFIEDBYTHEURIDELETETHEDELETEMETHODISUSEDTODELETETHERESOURCEIDENTIFIEDBYTHEURITRACETHETRACEMETHODISUSEDFORTESTINGTHECOMMUNICATIONBETWEENTHECLIENTANDTHESERVERTHESERVERSENDSBACKTHEREQUESTMESSAGE,EXACTLYASITRECEIVEDIT,ASTHEBODYOFTHERESPONSEA23A23A23A6A9A10A11A12A13A14A9A15A16A17A18A18A19A20A218HTTP請求/響應模型JSPA15A16A24A25A26A27A28A29A30A22A31A32A33A341詳敘REQUESTS讓我們仔細看看REQUESTS。用戶發(fā)送請求到服務器，通過點擊一個鏈接的網頁上，提交表單時，或輸入一個網頁地址在瀏覽器的地址欄。發(fā)送請求后，瀏覽器需要知道與哪些服務器交換數(shù)據(jù)，并要求得到資源。URL必須跟據(jù)服務器名詳細描術端口號,例如HTTP/WWWGEFIONSOFTWARECOM/INDEXHTML第一部分所顯示的URL中指定的REQUESTS是使用HTTP協(xié)議的。其次是服務器的名稱，在這種情況下WWWGEFIONSOFTWARECOM。WEB服務器等待請求將在某一特定的TCP/IP端口。端口號80是標準端口，用于HTTP請求。如果WEB服務器使用另一個端口，URL必須跟據(jù)服務器名稱指定端口號。例如HTTP/WWWGEFIONSOFTWARECOM8080/INDEXHTML這一請求被發(fā)送到一臺服務器，使用端口8080而不是80。最后部分的URL,/INDEXHTML,確定了客戶端請求的資源。網址實際上是一個專業(yè)化的統(tǒng)一資源標識符（URI，所界定的符G2524RFC2396G16280G7696G709。URL跟據(jù)地址確定部G1233資源，例如服務器，其中G2265G2559的資源。另一種G12879G3423的URI是一個統(tǒng)一資源名稱（URNG709，這是一個G1852G4628G2819一標識符,G7092G16782在G1172G1052地G7053G18129G7389G6940的資源的G1313G13634。HTTPG2494G3800G10714URL的不G2528。G16825G7477G8466的URIG2656URLG5132G5132被G1126換，不G5196的是，G1194們G7389不G2528的定G1053G11065G7389不G2528的G16280G7696。我G16809G3282使用G7477G8466所界定的HTTP/11G16280G14551（符G2524RFC2616G5192G709，這是G11468G5415接G17829，G1209G1194們是如G1321G1075用在SERVLETG2656JSPG16280G14551。G3252G8504，我G2494G7389G5415URIG1209HTTPG5332G3848時G6177使用的TERMURL（或HTTPS，G1038HTTPG2164G4506G17842G13459G709，其次是服務器名稱，并G2499G14033G7389一個端口號，如G1209G2081的例G4388。我使用的URIG1328G1038一個通用術G16833的G1231G1321G4395符G1030，確定了資源，確定G1313G13634G2499G1209G1186上下G7003而不G13793要URI。例如，G5415請求G5062被交G1196G13485服務器，G1313G13634G5062G13475定確，G2494G7389資源標識符是G5468G18337要的。瀏覽器使用URLG1461G5699G2031G17908的請求G9052G5699使用指定的協(xié)議發(fā)送到指定的服務器。HTTP請求G9052G5699G11013G989部G1233G13464G6116一個請求G15904，請求標G3848，請求G1319。請求G15904G1209G7053G8873名稱的G5332G3848，G19555后G17839G15904了資源標識符G2656協(xié)議G10268G7424所使用的瀏覽器A35A35A35A36A37A38A39A40A41A42A37A43A44A45A46A46A47A48A499GET/INDEXHTMLHTTP/11最G5132用的G7053G8873是GET。G20050名G5617G1053，GET請求用于G1186服務器G7828G13046資源。這是G21676G16760的請求G7053G8873，G3252G8504，如果G5756輸入網址在瀏覽器的地址欄，或G13785點擊一個鏈接，發(fā)送的請求是G1328G1038一個GET請求到服務器。標G20076要求提G1391G20081G3818的G1461G5699G2499G1209使用服務器G7481G3800G10714請求。G18050G1226G8503G7003是G2494G2265G2559在某些G12879G3423的REQUESTS，如POST請求G1209后G16764G16782。下G19766是一個例G4388，一個G7389G6940的HTTP請求G9052G5699GET/INDEXHTMLHTTP/11HOSTWWWGEFIONSOFTWARECOM用戶G1207G10714MOZILLA/50WINDOWSUWIN9X490ENUSRV102接G2475IMAGE/GIF,IMAGE/JPEG,IMAGE/PJPEG,IMAGE/PNG,/接G2475G16833G16340EN接G2475G4395符ISO88591,UTF8請求G15904指定的GETG7053G8873G2656要求的資源G2641名/INDEXHTML使用HTTP/11協(xié)議G17832G3250。不G2528的G3848提G1391不G2528的資G7021。G1039G7438標G3848使用URLG2590G16797服務器G1039G7438名。服務器G2499G14033G7389G3822個名稱，G3252G8504這一G1461G5699是用G7481G2318分G3822個G15406G6323的網G13488服務器G1861G1151G11468G2528的WEB服務器G17839G12255。USERAGENT標G20076G2265G2559G7389關G12879G3423的瀏覽器提出請求。服務器G2499G1209用它G7481傳送不G2528G12879G3423的反應，不G2528G12879G3423的瀏覽器。例如，如果服務器知道是使用INTERNETEXPLORER或NETSCAPENAVIGATOR，它G2499G1209發(fā)出一個反應，充分利用每一個瀏覽器的獨特功G14033。它G1075G2499G1209判斷客戶端G1209G3818的HTML瀏覽器使用，如G7092G13459標記G16833G16340（標記G16833G16340G709的瀏覽器的手G7438或PDA設備，并產生適G5415的反應。請求G3848提G1391G7389關的G16833G16340G2656G7003G1226G7696式的瀏覽器。這些標G20076G2499G1209用G7481適應不G2528功G14033的瀏覽器G2656不G2528的用戶，如使用了一個G2475支持的G3282像G7696式G2656首選G16833G16340。這些G2494是一小部分的標G20076中G2499G1209G2265G2559請求的G1461G5699。資源標識符（URIG709，并不一定對應于一個靜態(tài)G7003G1226在服務器上。它G2499G1209識別一個G2499執(zhí)G15904的G12255序，記錄在一個數(shù)據(jù)庫中，或差不G3822G1231G1321WEB服務器知道。這就是通用術G16833資源的使用。事實上，就沒G7389辦G8873判斷/INDEXHTML的通用資源識別符對應的G7003G1226還是其G1194G1172G1052東西，它G2494是一個名G4395，這意味著一些服務器。WEB服務器被配G13634G1038地G3282這些指定的名稱對應指定的資源。2祥敘RESPONSEA50A50A50A51A52A53A54A55A56A57A52A58A59A60A61A61A62A63A6410G5415WEB服務器收到請求，在URI的其礎上決定，用配G13634G1461G5699G7481G3800G10714它。它G2499G1209G3800G10714簡單的HTMLG7003G1226，G1075G2499G1209將申請轉交G13485一些G13464G6116部分，負責G11468應的資源URI。這G2499G14033是一個G12255序使用的數(shù)據(jù)庫G1461G5699，例如，動態(tài)生G6116一個適G5415的反應。在瀏覽器沒G7389差別時RESPONSE是如G1321G3800G10714的一切關心的就得到了答復。在G3250復G18050G1226看起G7481G12879似請求G9052G5699。它G2265括G989G1226事一個狀態(tài)G15904，響應G3848，G2656一個G2499選的反應G7438構。下G19766是一個例G4388HTTP/11200OKLASTMODIFIEDMON,20DEC2002232642GMTDATETUE,11JAN2003205240GMTSTATUS200CONTENTTYPETEXT/HTMLSERVLETENGINETOMCATWEBSERVER/50CONTENTLENGTH59HELLOWORLD狀態(tài)G15904G5332G3848的名稱協(xié)議，其次是狀態(tài)G1207碼，并G7389簡短的描述狀態(tài)G1207碼。在這里，狀態(tài)G1207碼是200，這意味著被執(zhí)G15904的請求G6116功。G3250應G18050G1226標G20076就像請求G9052G5699。在這個例G4388中，最后修改標G20076G13485出的日期G2656時間，資源最后修改。G16825瀏覽器G2499G1209使用G8504G1461G5699G1328G1038一個時間戳在G7424地緩存下一次用戶要求這一資源，G1194G2499G1209向服務器發(fā)送它G2494要G5415它被更新，G3252G1038這是最后一次要求。內容G12879G3423標G3848講述了G1172G1052G12879G3423的瀏覽器的反應數(shù)據(jù)G2656身G1319G2265G2559的內容長度標G20076是G3822G1052大。其G1194標G20076不G16340自明。一個空G15904分隔標G20076的G18050G1226G8503G7003。在這里，內容G1319是一個簡單的HTML網頁HTMLHELLOWORLDG5415然，人G1319G2499G1209G2265G2559一個更G1038復雜的HTML網頁或G1231G1321其G1194G12879G3423的內容。例如，請求G2499G14033會G17832G3250一個HTML頁G19766的IMG要素。G5415瀏覽器讀取第一個反應時，并G16760G1038是IMG要素，它就發(fā)出了一個新的要求所確定的資源，往往是在平G15904。服務器G17832G3250一個響應，A65A65A65A66A67A68A69A70A71A72A67A73A74A75A76A76A77A78A7911每幅G3282像的要求，與內容G12879G3423標G20076G2590G16797G1172G1052G12879G3423的影像（例如G3282片/GIFG7696式G709，G1319內G2559G7389G4395節(jié)構G6116的G12879G3423。3請求參數(shù)除了URIG2656標G20076，一個請求G9052G5699G2499G1209G2265G2559更G3822G1461G5699的形式參數(shù)。如果確定了的URI服務器端G12255序顯示天氣G1461G5699，例如，請求參數(shù)G2499G1209提G1391G7389關城市的用戶希望看到一個預測。電G4388商務的應用，G5332放的我們G2499G14033會確定一個G12255序，G3800G10714訂單，與用戶的客戶數(shù)量G2656名單所要采購的物品轉移G1328G1038參數(shù)。參數(shù)G2499G1209發(fā)出兩種G7053式G1055一G8731G1227上的URI形式的G7609G16822G4395符G1030或發(fā)出的一部分，請求G18050G1226G8503G7003。這是一個例G4388，一個網址的G7609G16822G4395G1030HTTP/WWWWEATHERCOM/FORECASTCITYHERMOSABEACHURLG13546碼名稱/G1552對分隔符號。4請求方法如G2081所述，得到的是最G5132用的請求G7053G8873，G7100在G14731