a基于bs方式的即时通讯软件的设计与实现

基于B/S方式的即时通讯软件的设计与实现摘要即时通讯（INSTANTMESSAGING）是目前INTERNET上最为流行的通讯方式，而各种各样的即时通讯软件也层出不穷；服务提供商也提供了越来越丰富的通讯服务功能。随着互联网的发展，即时通讯的运用将日益广泛，即时通讯软件业方兴未艾。本文首先描述了即时通讯业的发展和现状，然后初步探讨了即时通讯所涉及到的一些技术，最后对现有的技术进行了对比和分析，提出了一些可能的改进方案，并且设计了一个名为WEBMSN的即时通讯系统。WEBMSN是基于B/S的模式的即时通讯系统，通过IE等浏览器直接完成客户端的登录、数据传输，更G2164G1427G6475了用户G1055G19400的通讯和G1144G2463；G1363用最G7044的AJAX技术，G1363G1866G19762G5132G5567，G7092G19668等G5465G20041G19766的G2059G7044，G4466现了即时通讯的功能。G3324系统设计G994G5326模过G12255G1025，G1363用了G56G48G47和G19766G2533对G16949的分析、设计方G8873，本系统基于NETFRAMEWORK11，G1363用VISUALSTUDIONET2003G1328为G5332发G5049G1867，将NETG1025的一些G7044技术运用到了系统G1025；G3324G5332发过G12255G1025用到了时G991流行的G18337G7512G5332发方G8873，G1260G2282了系统的设计。关键词WEBMSN；即时通讯；B/S；AJAXTHEDESIGNANDIMPLEMENTATIONOFINSTANTMESSAGEBASEDONB/SABSTRACTINSTANTMESSAGEISCURRENTLYTHEMOSTPOPULARWAYTOCOMMUNICATEONTHEINTERNET，BYTHEWAYVARIOUSINSTANTMESSAGESOFTWAREHAVEBEENCONTINUOUSLYAPPEARINGSERVICEPROVIDEROFFERSMOREANDMORECOMMUNICATIONSERVICESNOWADAYSASTHEDEVELOPMENTOFTHEINTERNET,INSTANTMESSAGEWILLBEMOREWIDELYUSEDTHANBEFORETHISARTICLEFIRSTDESCRIBESTHEDEVELOPMENTANDTHECURRENTSTATUSOFTHEINSTANTMESSAGETHENITDISCUSSESTHETECHNOLOGIESOFTHEINSTANTMESSAGESUCHASCOMMUNICATIONPROTOCOL,SERVICEMODEANDFRIENDMAKINGMODEITMAKESACOMPARISONANDANALYSISWITHRESPECTTOTHECURRENTTECHNOLOGYANDALSOPROVIDESSOMEPOSSIBLESOLUTIONSFORIMPROVEMENTATLASTITDESIGNSANDDEVELOPSANINSTANTMESSAGESYSTEMNAMEDWEBMSNTHEWEBMSNSYSTEMISANINSTANTMESSAGESYSTEMWHICHBASESONB/SMODEYOUCANLOGINANDINTERACTWITHITTHROUGHIEITMAKESCOMMUNICATIONANDFINDINGFRIENDSMORECONVENIENTLYITISDESIGNEDUSINGAJAX,WHICHDOESNTNEEDTOWAITFORREFRESHINGPAGE,SOCARRYOUTCOMMUNICATIONINSTANTLYTHISSYSTEMISBASEDONNETFRAMEWORK11ANDUSESVISUALSTUDIONET2003ASTHEDEVELOPMENTTOOLITACCUMULATEDSOMENEWTECHNOLOGYINNETINTOOURSYSTEMDURINGTHEPROCESSOFDEVELOPMENT,ITUSEDTHEPOPULARRECONSTRUCTIONDEVELOPMENTMETHOD,WHICHOPTIMIZESTHESYSTEMDESIGNKEYWORDSWEBMSNINSTANTMESSAGEB/SAJAX目录G16782文G5647G20041数G726G21G23G20041A1A3A0A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A6A7A2A4A8A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A6A6A5A1A11A9A10A12A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A6A6A5A6A11A9A13A14A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A6A6A5A15A18A16A17A12A19A9A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A6A6A5A20A23A21A22A24A12A25A26A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A6A6A5A27A30A28A29A31A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A6A6A5A27A5A1A34A32A6A33A33A15A30A28A29A31A35A36A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A6A6A5A27A5A6A39A37A38A39A40A41A34A40A41A6A33A33A33A35A36A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A15A6A5A27A5A15A44A42A46A0A35A36A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A15A6A5A43A48A45A47A49A52A53A50A51A54A57A35A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A15A15A23A55A4A8A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A20A15A5A1A59A56A58A60A12A61A62A23A55A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A20A15A5A6A59A56A63A64A7A2A23A55A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A20A20A7A2A65A66A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A27A20A5A1A69A67A68A70A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A27A20A5A1A5A1A73A59A56A74A47A49A12A71A72A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A27A20A5A1A5A6A77A40A75A52A79A32A76A12A78A80A71A72A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A43A20A5A6A83A81A82A65A66A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A86A20A5A6A5A1A83A81A84A65A66A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A86A20A5A6A5A6A88A85A87A89A65A66A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A92A20A5A15A7A2A25A26A4A8A90A65A66A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A94A20A5A20A7A2A78A91A65A66A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A33A20A5A20A5A1A96A93A78A91A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A33A20A5A20A5A6A98A95A78A91A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A33A20A5A20A5A15A100A97A99A60A78A91A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A1A20A5A20A5A20A103A101A7A2A78A91A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A6A27A7A2A22A24A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A15A27A5A1A28A102A58A60A25A26A22A24A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A15A27A5A6A106A104A58A60A25A26A22A24A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A20A43A108A105A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A43A43A5A1A108A105A107A109A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A43A43A5A6A108A105A110A111A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A43A110A68A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A86A114A112A113A115A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A92A118A95A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A1A94A119A120A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A116A117A117A121A121A122A123A124A125A126A123A124A127A128A129A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A116A117A117A121A121A122A123A124A125A126A123A124A127A1301A131A13224A1311引言即时通讯软件，G1972G1058是G8611一个上网用户G18129G5529G3803的联G13488G5049G1867。即时通讯软件G19512了能G3827G16765G5756G17817G17907G3332G3324网上G6226到G14270G5061的G7391G2463和G5049G1328G1261G1288，G17836可G1209G4466时G1144G16860和传G17894G1461G5699，而且，现G3324不G4581即时通讯软件G17836G19610成了文件G1861G1151、G16833G19911G13854G3837、网G13488G1262G16770等功能。G6142G8502到目前，G1852G10711G13434有G17829G22G1171G3822G1166G1363用即时通讯软件进行G1144流，G8503G3252为即时通讯软件G6329有数G1209G1171计的用户和G17817G17907G3698G19283的G5078G3342，所G1209各个G1856G2508G18129G11459上了G1025G3281G17837个G9520G3324的最G3835G5078G3342，一时G19400，即时通讯G5078G3342G11825G9907G3247G17227。G19512了G14162讯G52G52和G3281G3818的G1972G8466G14891名即时通讯软件G13451G13451G6524出G7044G10268本，网G7143也G6524出了一种G7044的即时通讯软件G252G252网G7143G8885G8885。G7403G10607G1856G2508也G6524出了名为G56G38的通讯G5049G1867。即时通讯软件最G7101发G5079于G20G28G286年G20G20月G205日，G1209色列特拉维文的G48IRABILISG47TD发表了一个题为ETSURFHOMEMIRABILISLTDPROVIDESNEWSOLUTIONSFORPEERTOPEERINTERNETCOMMUNICATIONS的G7044闻稿，同时发G5079了他们G7044产品IG38G52ISEEKYOU的BETA测试G10268。G17837G3837标志着INTERNET上的第一个成热的即时通讯系统（INSTANTG48ESSAGESYSTEM）的诞生。即时通讯服务G3324诞生G1055后的G1972年时G19400得到了G17817猛发展，成为G7044G3698INTERNET用户的G22个主要应用G1055一WEB，电子邮件和即时通讯。G3324G3281内，G20G28G28G28年G21月，深圳G14162讯G1856G2508G8503式发G5079OIG38G52G28G28BETABUILD0G21G200，G5332通G14162讯即时通讯服务。G21000年5月，G14162讯G52G52同时G3324线用户突破G200万；G2100G20年G21月L0日，G14162讯G52G52同时G3324线用户突破G2000万。G2100G23年G23月份G14162讯G52G52同时G3324线G1166数最高记录已经突破了600万G3835关，现G3324G14162讯G1856G2508G8503G3324把即时通讯系统往移动通讯方G2533扩展，如今已经将即时通讯G994手机短G1461G5699SG48S成功结合G17227来。即时通讯软件涉及和影响的领域已G17829越来越广，G1866竞争也越来越激烈。G3281内G52G52最G3835的敌手G7403G10607G56G38从G2100G20年G5332始研发，G2100G21年的G20G21月份G56G38G8503式发G5079，并且首创了很G3822技术G726G56G38是G3281内第一个做G3342景G13854G3837的；G56G38是第一个把同学录和校G2463录结合的；第一个把即时通讯G994休闲游戏相结合的；第一个把发送动画G994即时通讯相结合的。G3324一年的发展里，G56G38一度达到峰值G3324线G220万G1166，注册用户达到7000万。但是纵观G17837些即时通讯软件业，G18129是基于G38/S模式的，G19668要G991载客户端进行安装，用户名、密码、G13854G3837记录等也是存G6930G3324本G3332机器上，G3324安G1852G5627和方G1427G5627上G18129有所G8436G13582。设计并G5332发一个基于WEB的即时通讯G5191G2500，对于现G19466G8585的学G1076和研G12362，G18129是G7509为有G5859G1053的，基于G17837个前提和G17227G3252，G6117G17885G6333了基于B/S方式的即时通讯软件的设计G994G4466现G1328为G6117的G8617业设计。A1332A134A13524A1342系统分析21课题目的设计一个基于B/S模式的IG48软件，可G1209通过IE等浏览器直接完成客户端的登录、数据传输、G3921G2463G1461G5699分G13464G12661G10714、状G5589更G7044、G1016G1166G1209及G3822G1166的文G4395G13854G3837等功能。22课题意义G1328为计G12651机G999业的学生，即时了G16311和G6496G6581流行的即时通讯机G2058并且应用到G4466G17353过G12255G1025，将G7509G3835的提高G14270G5061的设计和G5332发软件的G12227G7509G5627；提G2331G14270G5061的G10714G16782和技术G8712G5191，G17331G17406G3281内G3818最G7044的技术和G5332发模式，为G1209后G12879G1296的G5332发G12227G13059经G20576；同时，G5332发出来的G1328品也可G1209G11507G8503运用到G4466G19481G5415G1025，方G1427G3835G4490的G8819通和G1144流。23应解决的问题G20服务系统模G3423的G17885G6333；G21G4466时G7609G11487G3324线G3921G2463列表；G22G2533G3324线G3921G2463发送即时G9052G5699；G23G4466时接G6922G3324线G9052G5699并且G5389出提G12046；5状G5589的即G1363G2011G6454（G3324线，G19556G17535等）。24需要实现的功能G20G4466现用户注册、登录、G17876出、更改状G5589等功能；G21G4466现文本G1461G5699发送；G22G4466现G6640G13046G3921G2463，G9167G2164G3921G2463，G2036G19512G3921G2463技术；G23G4466现G9052G5699的提G12046功能；5G4466现设G13634G3921G2463G7447G19492功能。25开发环境251VS2003开发环境介绍G57ISUALSTUDIO是G5506软G1856G2508出品的一G8466G3835G3423应用软件，是一G3883完G6984的G5332发G5049G1867G19610，G4439主要用于生成G36SG51G49EG55WEB应用G12255G5219、G59G48G47WEBSERG89IG70ES、G7712G19766应用G12255G5219和移动应用G12255G5219。G57ISUALBASIG70、G57ISUALG38G14G14、G57ISUALG38G6和G57ISUALG45G6G1852G18129G1363用相同的G19610成G5332发G10627G3671（IG39E）。G2045用G8504IG39E可G1209G1861G1151G5049G1867且有G2173于创G5326G9163合G16833G16340G16311G1927方案，G1363G12255G5219可G1209G1363用不同的G16833G16340G1861同G5332发。G49EG55G5332发G5191G2500G11013一G13464用于G5326G12447WEB服务应用G12255G5219和WINDOG90SG7712G19766应用G12255G5219的软件G13464件G7512成，G2265G6336G49EG55G7706G7562G41RAMEG90ORK、G49EG55G5332发G5049G1867和G36SG51G49EG55。G57ISUALSTUDIOG2100G22的G19610成G5332发G10627G3671G1025为G5332发G1166G2604提供了G3835G18339的G4466用G5049G1867G1209提高G5049G1328G6940G10587。G17837些G5049G1867G2265G6336了G14270动G13546G16805、G20045目创G5326G2533G4560、创G5326G18108G13638G5049G12255等。A1363A137A13824A137252SQLSERVER2000介绍SG52G47SERG89ERG21000G11013一系列相互G2339G1328的G13464件G7512成，能G9397G17287最G3835的WEBG12461G9869和G1237业数据G3800G10714系统存G1660和分析数据的G19668要。SG52G47SERG89ERG7512G7562各种G13464件通过G1321种方式发G6393合G2159，更富成G6940G3332G12661G10714数据。SG52G47SERG89ERG21000数据G5223G5353G6818提供完G6984的G59G48G47G6915G6357。G4439G17836G1867有G7512成最G3835的WEBG12461G9869的数据存G1660G13464件所G19668的可G1292G13565G5627、可用G5627和安G1852功能。SG52G47SERG89ERG21000G12255G5219设计模G3423G994WINDOG90SG39G49G36G7512G7562G19610成，用G1209G5332发WEB应用G12255G5219，并且SG52G47SERG89ERG21000G6915G6357ENGLISG75G52UERY和G48IG70ROSOFTG6640G13046服务等功能，G3324WEB应用G12255G5219G1025G2265含了用户G2463G3921的G7609询和强G3835的G6640G13046功能。253C语言介绍G38G6是一种G16833G16340,G4439是G999门为了G5506软的G49EG55战略而设计的一种G16833G16340G38G6也叫G38G6G49ET。26关键技术AJAX简介G36JAX是异步G45AG89ASG70RIPT和G59G48G47（G36SYNG70G75RONOUSG45AG89ASG70RIPTANDG59G48G47）的英文G13565写。“G36JAX”G17837个名词的发明G1166是G45ESSEG45AMESGARRETT,而G3835G2159G6524广并且G1363G36JAX技术炙手可热的是GOOGLE。GOOGLE发G5079的GMAIL，GOOGLESUGGEST等应用最终G16765G1166们了G16311了什么是G36JAX。G36JAX的核心G10714念G3324于G1363用G59G48G47HTTPREQUEST对G16949发送异步请求，最初为G59G48G47HTTPREQUEST对G16949提供浏览器G6915G6357的G5506软G1856G2508。G7101G3324G20G28G288年，G5506软G1856G2508G5332发WEBG10268OUTLOOK时，就已经G1209G36G70TIG89EG59控件的方式为G59G48G47HTTPREQUEST提供了G6915G6357。G36JAX是G1363用客户端脚本G994WEB服务器G1144G6454数据的WEB应用G5332发方G8873。G17837样，WEBG20041G19766不用打断G1144互流G12255进行G18337G7044G2164裁，就可G1209动G5589G3332更G7044。G1363用G36JAX，用户可G1209创G5326接G17829本G3332G7712G19766应用的直接、高可用、更丰富、更动G5589的WEB用户界G19766。G4466G19481上，G36JAX不是一种技术，而是G1972种技术。G8611种技术G18129G1867有独特G1055G3800，合G3324一G17227就形成了一个功能强G3835的G7044技术。G36JAXG2265G6336G726G20G59HG55G48G47和G38SS；G21G1363用文档对G16949模G3423进行动G5589显G12046和G1144互；G22G1363用G59G48G47和G59SG47G55进行数据G1144互和操G1328；G23G1363用G59G48G47HTTPREQUEST进行异步数据接G6922；5G1363用G45AG89ASG70RIPT将G4439们绑定G3324一G17227。A1394A140A14124A1403需求分析31即时消息的一般需求G20一般即时G9052G5699格式G19668求G726所有G4466体G5529须至G4581G1363用一种G9052G5699格式；一般即时G9052G5699格式G5529须定G1053发G1461者和即时G6922件箱的标识；一般即时G9052G5699格式G5529须G2265含一个G16765接G6922者可G1209回G9052G5699的G3332址；一般即时G9052G5699格式应该G2265含G1866他通讯方G8873和联系G3332址，例如电话号码，邮件G3332；一般即时G1461G5699格式G5529须允许对G1461G5699有G6940负载的G13546码和鉴别G19762G36SG38II内容；一般即时G1461G5699格式G5529须反映G5415前最G3921的G3281G19481G2282G4466G17353；一般即时G1461G5699格式G5529须反映G5415前最G3921的可用G5627G4466G17353；G5529须存G3324方G8873，G3324扩展一般即时G9052G5699格式的时候，不影响原有的域；G5529须提供扩展和注册即时G9052G5699格式的模式的机G2058。G21可靠G5627G19668求G2339G16770G5529须存G3324机G2058，保证即时G9052G5699成功投G17894或者投G17894失败的时候，发G1461者获得G17287G3827的G1461G5699。G22G5627能G19668求即时G9052G5699的传输G5529须G17287G3827的G17817G17907；即时G9052G5699的内容G5529须G17287G3827丰富；即时G9052G5699的G19283度尽G18339G17287G3827的G19283。32即时通讯系统需求G20注册G19668求即时通讯系统允许G3822个用户注册；一个用户可G1209注册G3822个IG39；注册所G1363用的帐号G12879G3423为数G4395或者G4395母；注册G7044用户时G5529须填写符合要求的G1461G5699。G21通讯G19668求用户可G1209传输文本G9052G5699；用户的G9052G5699可G1209G1025转至服务器；用户可G1209从服务器获取G1025转的G3921G2463G9052G5699；G22G3921G2463G12661G10714G19668求用户可G1209G7609询G3921G2463；用户可G1209G9167G2164G3921G2463；A1425A143A14424A143用户可G1209G9167G2164G3822个G1166为G3921G2463，一个用户可G1209被G3822个G1166G9167G2164为G3921G2463用户可G1209G2036G19512G3921G2463；用户可G1209将G3921G2463G6930G3324G3822个G13464G1025；用户的G3921G2463一次只能属于一个G13464。G23状G5589G2011G6454G19668求用户可G1209G17885G6333登录状G5589；登录完成后用户可G1209G2011G6454状G5589（G3324线，G19556G17535）；用户可G1209注销登录。5G7609G11487G3324线G3921G2463G19668求用户登录时列出所有G3324线G3921G2463；用户可G1209G11487到G7044G17829登录的G3921G2463；用户将不G3324G11487到临时登出的G3921G2463。4系统设计41方案论证411“即时”技术的选择G13854G3837系统G4466现的关键G3324于G1866G4466时的特G5627，G2265G6336状G5589的G4466时改变，G9052G5699的G4466时G6922发，状G5589的G4466时G2011G6454等，而传统的WEB应用采用同步G1144互过G12255，G17837种情况G991，用户首先G2533WEB服务器发送一个请求，然后WEB服务器根据用户请求的内容，执行相应的任务，并G2533用户返回结果。G17837是一种不连贯的用户体G20576，G3324服务器G3800G10714请求时，用户只能等G5465，G8504时浏览器显G12046的G20041G19766是空白的，G17837也就是通G5132所说的“白屏”现G16949，应用G8504种技术肯定G4466现不了即时通讯所要求的G6940果。所G1209就G19668要寻求一种G7044的技术来G4466现本系统所要求的即时的G6940果，而G36JAX恰G3921弥补了WEB应用的G17837一G13582G9869。G994传统的WEB应用不同，G36JAX采用了异步G1144互的方式。G4439G3324用户和服务器G1055G19400G5353入了一个G1025G19400媒介，从而改变了同步G1144互过G12255G1025的“G3800G10714等G5465G3800G10714等G5465”模式。用户的浏览器G3324执行任务时即装载了G36JAXG5353G6818。该G5353G6818是用G45AG89ASG70RIPTG16833G16340G13546写的，通G5132位于一个G19556G15267的G7706G7562G1025，负G17143转发用户界G19766和服务器G1055G19400的G1144互。G36JAXG5353G6818允许用户和应用系统G1055G19400的G1144互G1209异步的方式进行，独G12447于用户G994WEB服务器G1055G19400的G1144互。现G3324，可G1209通过G36JAXG5353G6818G2533WEB服务器发送请求。所G1209本系统G1927定采用G36JAX来G4466现即时通讯各个G18108分“即时”G6940果的G4466现。G1363用G36JAX可G1209G5114来的G3921G3800有G1209G991G1972个方G19766G726G20G714G1955G17743服务器的负G6297。G36JAX的原G2029是“G6365G19668取数据”，可G1209最G3835G12255度G3332G1955G4581G1899G1325请求，G1955G17743服务器的负G6297。A1456A146A14724A146G21G714G7092G19668G2059G7044G20041G19766，G1955G4581用户心G10714和G4466G19481的等G5465时G19400。特别是G3324G16847取G3835G18339数据时，不G1262G1699G2059G7044G20041G19766G18039样出现白屏的情况，G36JAXG1363用G59G48G47HTTPREQUEST对G16949发送请求并且得到服务器响应，G3324不G18337G7044载入G6984个G20041G19766的情况G991，用G45AG89ASG70RIPT操G1328G39OG48更G7044G20041G19766。G3252G8504G3324G16847取数据的过G12255G1025，用户所G19766对的不是白屏，是原来的G20041G19766内容，只有G3324数据接G6922完G8617后G6177更G7044相应G18108分的内容。G17837种更G7044是G11648G19400的，用户G1972G1058G5875G16285不到。G22G714G5114来更G3921的用户体G20576。G23G714可G1209把G1209前一些服务器负G6297的G5049G1328转G4245到客户端，G2045用客户端闲G13634的能G2159来G3800G10714，G1955G17743服务器负G6297，G1817分G2045用G4497G5114G17176G9316，G14422G13434空G19400和G4497G5114G12211用成本。5G714可G1209G16855用G3818G18108数据。6G714基于标G1946G2282的并广泛G6915G6357的技术，不G19668要G991载G6566件或者G4579G12255G5219。7G714进一步G1431进G20041G19766G2588现G994数据的分G12175。412WEBMSN的模型选择G20即时通讯系统的一般模G3423即时通讯服务有G1016个G4466体G726发送者和即时G6922G1461箱。即时通讯G2339G16770定G1053了即时通讯服务、发G1461者和即时G6922G1461箱G1055G19400的G1144互G1328用。即时通讯服务G994G1866他邮件服务不同G1055G3800G3324于，即时G9052G5699本G17535G17287G3827的G4579，G1427于G5567G17907G1144G1196到即时G6922件箱。个体，用户G1207G10714，即时通讯系统的模G3423如G3282G23G20表G12046G726即时通讯系统模G3423发G1461者或者即时G6922G1461箱的G17535份鉴别。不同的G6922G1461箱有不同的G17535份鉴别G19668求。不同的G7061观者有不同的G17535份鉴别的G19668求。服务内G18108可能存G3324G3822服务器或者G3822G1207G10714服务器。也就是说一个即时通讯服务的G17935G17765的连接，内G18108可能有G3809G7446的G18337定G2533和G1207G10714结G7512。G1207G10714服务器即时G6922G1461箱的G17535份G994G1866他服务器G1144G6454即时G9052G5699。服务并不G19668要一个服务器，可G1209通过发G1461者和即时G6922G1461箱G1055G19400的直接通讯G4466现。涉及G994G1866他即时通讯服务的情况，可能G1262有G252定的内G18108机G2058。个体G17836可G1209通过G6922件箱用户G1207G10714设G13634G1144G1196G16280G2029（G39ELIG89ERYRULES）G19492G2058即时通讯服务把即时G1461G5699G1144G1196到即时G6922G1461箱。G21即时通讯系统服务G6311G6181模G3423现G3324不G4581即时通讯系统服务的内G18108G6311G6181G1025采用模式一；也有G7509G1866个别系统G3324即