引用楼主kokming999于2013-05-21 21:10发表的 一种关于即时聊天的设想 :
打家都用过即时聊天吧

没用过    
直接打电话就好

本来就是个人yy的一个东西，怎么可能有人用过 [s:274]

参考xmpp协议

同时兼容各IM协议的软件早就有了，并且是开源的，比如pidgin等。

还有就是，就算你把这货做出来了，依然不能跟QQ互通。

楼主~~~只要用邮件组~~~

这种模式是不可能的，垄断压你。

互联网将来的发展趋势必然走向融合，目前这种群雄割据的局面注定了其低效率高成本的悲催现实，是不合历史发展方向的。除了通信协议的互联，其实也应开发各类周边应用功能的转移与互通，这样这个想法就有了更加广阔的发展空间。希望LZ能继续高处着眼，广处着手，继续把这个创意发扬光大。

现在有很多mailing list，google网上论坛就是一例，mailing list的问题是邮件暴多。
另一种开放的即时聊天协议是IRC，但IRC现在在传图片、文件，还有大段代码上还有欠缺。

已经有了：XMPP协议。自己在自己的域名上架设服务器，服务器-服务器互通。
和电子邮件不一样的地方是，电子邮件的服务器-服务器中间有很多跳。而XMPP协议是直通的。

比如XXXXXXXXXX就是一个这样的节点。另外XXXXXXXXXXXXX也是。我在后者的ID是neoatlantis@XXXXXXXXXXXXX
XMPP可以有加好友的功能。但是本身协议是不规定一定要加好友才能通信的。所以，欢迎轰炸上面这个ID。

（另外我自己的域名就不发布了，一个架设在VPS上的服务器。）
另外XMPP的ID结构实际上是 用户名@域名/资源，比如neoatlantis@XXXXXXXXXXXXX/laptop，这样区分你是在哪里登录。和qq不同，xmpp允许同一账号用不同的资源名在不同的地点登录。


另外XMPP支持网关。原则上讲是可以通过贡献者编写XMPP-各种协议的网关实现跨协议通信的。比如MSN或者QQ。但是qq自己的不开放政策导致XMPP-QQ的网关很难长久；不过我似乎记得有XMPP-MSN的网关呢。


XMPP现在用得也很多了。比如有些网站的网页聊天就是这样实现的。比如Gtalk也是基于它的。



另外更换聊天协议的最大阻力在于你的旧协议上的好友。

技术上是可行的，作为专业人士，必须告诉你，很多协议是不公开的，甚至还进行调整避免你进行接入，很久很久以前，qq在linux下就是例子

我知道的即时聊天工具MSN和YAHOO是可以互通的

QQ协议是不允许破解或者搞兼容客户端的。他们甚至为此而经常修改协议。

至于其他聊天工具，协议大多早就开放了。

原来这种东东已经有了，目前最大的困难应该是推广这东西。让身边的好友都换聊天工具困难度好大。。。

这协议已经相当完善。它是可扩展的，不但可以传输即时聊天信息……还可以传送微博……群聊天也有……网站做推送消息什么的也有用……

通讯是基于SSL加密的……服务器是分布的……所以只要服务器没问题……这途中监听是不可能的……qq？qq用简化XXTEA算法不说……对称密钥还是没有经过非对称加密传送的……

这协议现在已经成为IETF制订的标准了……去google找下很容易就找到了。 XMPP标准基金会：XXXXXXXXXXXXXXXXXXX

RFC标准：

RFC	Short Name	Formats	Description
RFC 6120	XMPP CORE	Text | HTML	XML streams, SASL, TLS, stanza semantics (supersedes RFC 3920)
RFC 6121	XMPP IM	Text | HTML	XMPP extensions for basic instant messaging and presence (supersedes RFC 3921)
RFC 6122	XMPP ADDR	Text | HTML	XMPP address format
RFC 3923	XMPP E2E	Text | HTML	End-to-end signing and object encryption for XMPP
RFC 4854	XMPP URN	Text | HTML	A Uniform Resource Name (URN) namespace for use in XMPP extensions
RFC 4979	XMPP ENUM	Text | HTML	IANA registration of an Enumservice (see RFC 3761) for XMPP
RFC 5122	XMPP URI	Text | HTML	A Uniform Resource Identifier (URI) scheme for XMPP (this specification corrects several errors in RFC 4622)

XMPP扩展（网站上抓的）：
[table=100%,#ffffff,#dddddd,1,0]NumberNameTypeStatusDateXEP-0001 (PDF)XMPP Extension Protocols XMPP扩展协议
ProceduralActive2010-03-10XEP-0002 (PDF)Special Interest Groups (SIGs) 特殊兴趣小组
ProceduralActive2002-01-11XEP-0004 (PDF)Data Forms 数据表单
Standards TrackFinal2007-08-13XEP-0009 (PDF)Jabber-RPC
Standards TrackFinal2011-11-10XEP-0012 (PDF)Last Activity 最近活动时间
Standards TrackFinal2008-11-26XEP-0013 (PDF)Flexible Offline Message Retrieval
Standards TrackDraft2005-07-14XEP-0016 (PDF)Privacy Lists 隐私列表
Standards TrackDraft2007-02-15XEP-0019 (PDF)Streamlining the SIGsProceduralActive2002-03-20XEP-0020 (PDF)Feature NegotiationStandards TrackDraft2006-11-21XEP-0027 (PDF)Current Jabber OpenPGP UsageHistoricalActive2006-11-29XEP-0030 (PDF)Service DiscoveryStandards TrackFinal2008-06-06XEP-0033 (PDF)Extended Stanza AddressingStandards TrackDraft2004-09-15XEP-0045 (PDF)Multi-User Chat 多用户聊天
Standards TrackDraft2012-02-08XEP-0047 (PDF)In-Band Bytestreams 带宽内传送比特流
Standards TrackFinal2012-06-22XEP-0048 (PDF)Bookmarks 书签
Standards TrackDraft2007-11-07XEP-0049 (PDF)Private XML StorageHistoricalActive2004-03-01XEP-0050 (PDF)Ad-Hoc CommandsStandards TrackDraft2005-06-30XEP-0053 (PDF)XMPP Registrar FunctionProceduralActive2008-10-29XEP-0054 (PDF)vcard-tempHistoricalActive2008-07-16XEP-0055 (PDF)Jabber SearchHistoricalActive2009-09-15XEP-0059 (PDF)Result Set ManagementStandards TrackDraft2006-09-20XEP-0060 (PDF)Publish-SubscribeStandards TrackDraft2010-07-12XEP-0065 (PDF)SOCKS5 BytestreamsStandards TrackDraft2011-04-20XEP-0066 (PDF)Out of Band DataStandards TrackDraft2006-08-16XEP-0068 (PDF)Field Standardization for Data FormsInformationalActive2012-05-28XEP-0070 (PDF)Verifying HTTP Requests via XMPPStandards TrackDraft2005-12-14XEP-0071 (PDF)XHTML-IMStandards TrackDraft2012-11-28XEP-0072 (PDF)SOAP Over XMPPStandards TrackDraft2005-12-14XEP-0076 (PDF)Malicious StanzasHumorousActive2003-04-01XEP-0077 (PDF)In-Band Registration 带宽上注册
Standards TrackFinal2012-01-25XEP-0079 (PDF)Advanced Message ProcessingStandards TrackDraft2005-11-30XEP-0080 (PDF)User LocationStandards TrackDraft2009-09-15XEP-0082 (PDF)XMPP Date and Time ProfilesInformationalActive2003-05-28XEP-0083 (PDF)Nested Roster GroupsInformationalActive2004-10-11XEP-0084 (PDF)User Avatar 用户头像
Standards TrackDraft2008-11-05XEP-0085 (PDF)Chat State NotificationsStandards TrackFinal2009-09-23XEP-0092 (PDF)Software VersionStandards TrackDraft2007-02-15XEP-0095 (PDF)Stream InitiationStandards TrackDraft2004-04-13XEP-0096 (PDF)SI File TransferStandards TrackDraft2004-04-13XEP-0100 (PDF)Gateway InteractionInformationalActive2005-10-05XEP-0106 (PDF)JID EscapingStandards TrackDraft2007-06-18XEP-0107 (PDF)User MoodStandards TrackDraft2008-10-29XEP-0108 (PDF)User ActivityStandards TrackDraft2008-10-29XEP-0114 (PDF)Jabber Component ProtocolHistoricalActive2012-01-25XEP-0115 (PDF)Entity CapabilitiesStandards TrackDraft2008-02-26XEP-0118 (PDF)User TuneStandards TrackDraft2008-01-30XEP-0122 (PDF)Data Forms ValidationStandards TrackDraft2004-09-22XEP-0124 (PDF)Bidirectional-streams Over Synchronous HTTP (BOSH)Standards TrackDraft2010-07-02XEP-0126 (PDF)InvisibilityInformationalActive2005-08-19XEP-0127 (PDF)Common Alerting Protocol (CAP) Over XMPPInformationalActive2004-12-09XEP-0128 (PDF)Service Discovery ExtensionsInformationalActive2004-10-20XEP-0131 (PDF)Stanza Headers and Internet MetadataStandards TrackDraft2006-07-12XEP-0132 (PDF)Presence Obtained via Kinesthetic Excitation (POKE)HumorousActive2004-04-01XEP-0133 (PDF)Service AdministrationInformationalActive2005-08-19XEP-0134 (PDF)XMPP Design GuidelinesInformationalActive2004-12-09XEP-0136 (PDF)Message ArchivingStandards TrackDraft2010-06-21XEP-0137 (PDF)Publishing Stream Initiation RequestsStandards TrackDraft2005-08-26XEP-0138 (PDF)Stream CompressionStandards TrackFinal2009-05-27XEP-0141 (PDF)Data Forms LayoutStandards TrackDraft2005-05-12XEP-0143 (PDF)Guidelines for Authors of XMPP Extension ProtocolsProceduralActive2011-07-08XEP-0144 (PDF)Roster Item ExchangeStandards TrackDraft2005-08-26XEP-0145 (PDF)AnnotationsHistoricalActive2006-03-23XEP-0146 (PDF)Remote Controlling Clients 远程控制客户端
InformationalActive2006-03-23XEP-0147 (PDF)XMPP URI Scheme Query ComponentsInformationalActive2006-09-13XEP-0148 (PDF)Instant Messaging Intelligence Quotient (IM IQ)HumorousActive2005-04-01XEP-0149 (PDF)Time PeriodsInformationalActive2006-01-24XEP-0152 (PDF)Reachability AddressesStandards TrackProposed2013-02-05XEP-0153 (PDF)vCard-Based AvatarsHistoricalActive2006-08-16XEP-0155 (PDF)Stanza Session NegotiationStandards TrackDraft2008-01-14XEP-0156 (PDF)Discovering Alternative XMPP Connection MethodsStandards TrackDraft2007-06-12XEP-0157 (PDF)Contact Addresses for XMPP ServicesInformationalActive2007-01-31XEP-0158 (PDF)CAPTCHA Forms 验证码格式
Standards TrackDraft2008-09-03XEP-0160 (PDF)Best Practices for Handling Offline MessagesInformationalActive2006-01-24XEP-0163 (PDF)Personal Eventing ProtocolStandards TrackDraft2010-07-12XEP-0166 (PDF)JingleStandards TrackDraft2009-12-23XEP-0167 (PDF)Jingle RTP SessionsStandards TrackDraft2009-12-23XEP-0169 (PDF)Twas The Night Before Christmas (Jabber Version)HumorousActive2009-12-24XEP-0170 (PDF)Recommended Order of Stream Feature NegotiationInformationalActive2007-01-04XEP-0171 (PDF)Language TranslationStandards TrackDraft2011-06-15XEP-0172 (PDF)User NicknameStandards TrackDraft2012-03-21XEP-0174 (PDF)Serverless MessagingStandards TrackFinal2008-11-26XEP-0175 (PDF)Best Practices for Use of SASL ANONYMOUSInformationalActive2009-09-30XEP-0176 (PDF)Jingle ICE-UDP Transport MethodStandards TrackDraft2009-06-10XEP-0177 (PDF)Jingle Raw UDP Transport MethodStandards TrackDraft2009-12-23XEP-0178 (PDF)Best Practices for Use of SASL EXTERNAL with CertificatesInformationalActive2011-05-25XEP-0182 (PDF)Application-Specific Error ConditionsProceduralActive2008-03-05XEP-0183 (PDF)Jingle Telepathy TransportHumorousActive2006-04-01XEP-0184 (PDF)Message Delivery ReceiptsStandards TrackDraft2011-03-01XEP-0185 (PDF)Dialback Key Generation and ValidationInformationalActive2007-02-15XEP-0186 (PDF)Invisible CommandStandards TrackExperimental2012-06-27XEP-0191 (PDF)Blocking CommandStandards TrackDraft2012-07-18XEP-0198 (PDF)Stream ManagementStandards TrackDraft2011-06-29XEP-0199 (PDF)XMPP PingStandards TrackFinal2009-06-03XEP-0201 (PDF)Best Practices for Message ThreadsInformationalActive2010-11-29XEP-0202 (PDF)Entity TimeStandards TrackFinal2009-09-11XEP-0203 (PDF)Delayed DeliveryStandards TrackFinal2009-09-15XEP-0205 (PDF)Best Practices to Discourage Denial of Service AttacksInformationalActive2009-01-07XEP-0206 (PDF)XMPP Over BOSHStandards TrackDraft2010-07-02XEP-0207 (PDF)XMPP Eventing via PubsubHumorousActive2007-04-01XEP-0220 (PDF)Server DialbackStandards TrackProposed2012-08-21XEP-0221 (PDF)Data Forms Media ElementStandards TrackDraft2008-09-03XEP-0222 (PDF)Persistent Storage of Public Data via PubSubInformationalActive2008-09-08XEP-0223 (PDF)Persistent Storage of Private Data via PubSubInformationalActive2008-09-08XEP-0224 (PDF)AttentionStandards TrackDraft2008-11-13XEP-0227 (PDF)Portable Import/Export Format for XMPP-IM ServersStandards TrackDraft2010-03-12XEP-0229 (PDF)Stream Compression with LZWStandards TrackDraft2007-09-26XEP-0231 (PDF)Bits of BinaryStandards TrackDraft2008-09-03XEP-0239 (PDF)Binary XMPPHumorousActive2008-04-01XEP-0245 (PDF)The /me CommandInformationalActive2009-01-21XEP-0249 (PDF)Direct MUC InvitationsStandards TrackDraft2011-09-22XEP-0256 (PDF)Last Activity in PresenceStandards TrackDraft2009-09-15XEP-0257 (PDF)Client Certificate Management for SASL EXTERNALStandards TrackExperimental2012-07-18XEP-0258 (PDF)Security Labels in XMPPStandards TrackDraft2013-04-08XEP-0260 (PDF)Jingle SOCKS5 Bytestreams Transport MethodStandards TrackDraft2011-09-23XEP-0261 (PDF)Jingle In-Band Bytestreams Transport MethodStandards TrackDraft2011-09-23XEP-0262 (PDF)Use of ZRTP in Jingle RTP SessionsStandards TrackDraft2011-06-15XEP-0263 (PDF)ECO-XMPPHumorousActive2009-04-01XEP-0266 (PDF)Codecs for Jingle AudioStandards TrackDraft2011-10-04XEP-0267 (PDF)Server BuddiesStandards TrackExperimental2012-05-29XEP-0268 (PDF)Incident HandlingStandards TrackExperimental2012-05-29XEP-0270 (PDF)XMPP Compliance Suites 2010Standards TrackDraft2009-09-30XEP-0275 (PDF)Entity ReputationStandards TrackExperimental2012-06-06XEP-0276 (PDF)Presence DecloakingStandards TrackExperimental2012-07-13XEP-0277 (PDF)Microblogging over XMPP 基于XMPP的微博
Standards TrackExperimental2012-05-22XEP-0280 (PDF)Message CarbonsStandards TrackExperimental2012-10-09XEP-0288 (PDF)Bidirectional Server-to-Server ConnectionsStandards TrackProposed2012-08-21XEP-0289 (PDF)Federated MUC for Constrained EnvironmentsStandards TrackExperimental2012-05-29XEP-0295 (PDF)JSON Encodings for XMPPHumorousActive2011-04-01XEP-0297 (PDF)Stanza ForwardingStandards TrackProposed2012-07-05XEP-0301 (PDF)In-Band Real Time TextStandards TrackExperimental2013-05-18XEP-0305 (PDF)XMPP QuickstartStandards TrackExperimental2013-03-01XEP-0308 (PDF)Last Message CorrectionStandards TrackDraft2013-04-08XEP-0309 (PDF)Service DirectoriesStandards TrackExperimental2012-05-29XEP-0312 (PDF)PubSub SinceStandards TrackExperimental2012-05-29XEP-0313 (PDF)Message Archive ManagementStandards TrackExperimental2012-04-18XEP-0314 (PDF)Security Labels in PubSubStandards TrackExperimental2012-07-27XEP-0315 (PDF)Data Forms XML ElementStandards TrackExperimental2012-10-15XEP-0316 (PDF)MUC Eventing ProtocolStandards TrackExperimental2013-01-03XEP-0317 (PDF)HatsStandards TrackExperimental2013-01-03XEP-0318 (PDF)Last Presence using Delayed DeliveryInformationalExperimental2013-03-04XEP-0319 (PDF)Last User Interaction in PresenceStandards TrackExperimental2013-03-04XEP-0321 (PDF)Remote Roster ManagementStandards TrackExperimental2013-04-16XEP-0320 (PDF)Use of DTLS-SRTP in Jingle SessionsStandards TrackExperimental2013-04-16XEP-0322 (PDF)Efficient XML Interchange (EXI) FormatStandards TrackExperimental2013-04-16XEP-0323 (PDF)Internet of Things - Sensor Data 物联网 - 传感器数据
Standards TrackExperimental2013-04-16XEP-0324 (PDF)Internet of Things - ProvisioningStandards TrackExperimental2013-04-16[tr]XEP-0325 (PDF)[td]Internet of Things - Control [i]物联网 - 控制
[/td]Standards TrackExperimental2013-05-06[/tr]XEP-0326 (PDF)Internet of Things - ConcentratorsStandards TrackExperimental2013-05-06XEP-0327 (PDF)RayoStandards TrackExperimental2013-05-06[/table]

所以国内不用，已经是落后了……至于转移好友我估计这个可能性不大……除非你的好友有同样的意愿……qq也正是避免流失用户才封闭的吧……