引文：
調(diào)試GLOOX 1.0.10的注冊(cè)功能頗費(fèi)了一些功夫。總體邏輯如GLOOX自帶的例子一樣是毫無疑問的，但是照搬例子又是不能完成注冊(cè)的，返回錯(cuò)誤碼為4------RegistrationBadRequest。筆者一開始在網(wǎng)上狂搜解決方案，資料少之又少，有建議重寫Client::handleNormalNode函數(shù)（目的是禁止SASL認(rèn)證）的，有直接繼承Client重寫Client::handleNormalNode函數(shù)的，但都沒說到點(diǎn)子上。經(jīng)過一段時(shí)間的研究，在GLOOX的maillist上得到啟發(fā)，順利完成注冊(cè)?，F(xiàn)將解決方案記錄下來：
環(huán)境
客戶端：GLOOX1.0.1.0 VS2008
服務(wù)器：OPENFIRE 默認(rèn)安裝
對(duì)于GLOOX自帶的注冊(cè)例子不能正常注冊(cè)的問題有人在郵件列表里提出來。一個(gè)哥們這樣回答：
Ok, I've found what the problem was
In openFire server parameters, Anonymous Login => Disabled !!!
意思是要禁用openFire服務(wù)器里的選項(xiàng)”注冊(cè)和登錄“的”匿名登錄“項(xiàng)。筆者按此說明禁用該選項(xiàng)，果然注冊(cè)成功。
這說明開始的注冊(cè)失敗是和匿名登錄有關(guān)系的。我們來看一下引用registration_expmple例子登錄失敗時(shí)的XML流：
S->C：服務(wù)器返回給客戶端支持的認(rèn)證機(jī)制：
<stream:features xmlns:stream='http://etherx.jabber.org/streams'><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><mechanism>DIGEST-MD5</mechanism><mechanism>PLAIN</mechanism><mechanism>ANONYMOUS</mechanism><mechanism>CRAM-MD5</mechanism></mechanisms><compression xmlns='http://jabber.org/features/compress'><method>zlib</method></compression><auth xmlns='http://jabber.org/features/iq-auth'/><register xmlns='http://jabber.org/features/iq-register'/></stream:features>
從上面XML流中我們可以看到，默認(rèn)openFire支持四種認(rèn)證機(jī)制，分別是：DIGEST-MD5、PLAIN、ANONYMOUS、CRAM-MD5。然后我們看GLOOX客戶端的響應(yīng)流：
C->S：客戶端返回選擇的認(rèn)證方式：
<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='ANONYMOUS'/>
可以看出，客戶端”無恥“的選擇了”匿名“--'ANONYMOUS'方式接下來的流程就是客戶端”無恥“的選擇了以匿名的方式登錄了服務(wù)器，然后再發(fā)送注冊(cè)請(qǐng)求，請(qǐng)求如下：
<iq id='uid:4e69eccd:00006784' type='set' from='447e0585@zxl/447e0585' xmlns='jabber:client'><query xmlns='jabber:iq:register'><username>bbaxiao</username><password>123456</password><name>test2</name><email>163@gmail.com</email></query></iq>
我們看到，IQ節(jié)里包含“form”屬性，即客戶端匿名身份標(biāo)識(shí)。
注意，一個(gè)客戶端已經(jīng)以一個(gè)身份（由服務(wù)器臨時(shí)分配的一個(gè)JID）登錄，建立了會(huì)話，在服務(wù)器上我們會(huì)看到這個(gè)會(huì)話，并且服務(wù)器發(fā)送心跳一直維護(hù)這個(gè)會(huì)話。這種情況下，這個(gè)客戶端再發(fā)送注冊(cè)請(qǐng)求（另一個(gè)身份）建立與服務(wù)器的連接是不被允許的。具體請(qǐng)參考XEP-0077（In-Band Registration）：我們關(guān)注這兩段：
If the entity cancels its registration with its "home" server (i.e., the server at which it has maintained its XMPP account), then the entity SHOULD NOT include a 'from' or 'to' address in the remove request the server SHOULD then return a <not-authorized/> stream error and terminate all active sessions for the entity. The server SHOULD perform the remove based on the bare JID <localpart@domain.tld> associated with the current session or connection over which it received the remove request. If the server is an instant messaging and presence server that conforms to XMPP IM [8], the server SHOULD also cancel all existing presence subscriptions related to that entity (as stored in the entity's roster).
If the entity cancels its registration with a service other than its home server, its home server MUST stamp a 'from' address on the remove request, which in accordance with XMPP Core will be the entity's full JID <localpart@domain.tld/resource>. The service MUST perform the remove based on the bare JID <localpart@domain.tld> portion of the 'from' address.
If the entity cancels its registration with its "home" server (i.e., the server at which it has maintained its XMPP account), then the entity SHOULD NOT include a 'from' or 'to' address in the remove request the server SHOULD then return a <not-authorized/> stream error and terminate all active sessions for the entity. The server SHOULD perform the remove based on the bare JID <localpart@domain.tld> associated with the current session or connection over which it received the remove request. If the server is an instant messaging and presence server that conforms to XMPP IM [8], the server SHOULD also cancel all existing presence subscriptions related to that entity (as stored in the entity's roster).
If the entity cancels its registration with a service other than its home server, its home server MUST stamp a 'from' address on the remove request, which in accordance with XMPP Core will be the entity's full JID <localpart@domain.tld/resource>. The service MUST perform the remove based on the bare JID <localpart@domain.tld> portion of the 'from' address.
意思是說注冊(cè)請(qǐng)求不能包含“from”屬性。正常的注冊(cè)流如下：
<iq id='uid:4e69eccd:00003d6c' type='set' xmlns='jabber:client'><query xmlns='jabber:iq:register'><username>bbaxiao</username><password>123456</password><name>test2</name><email>163@gmail.com</email></query></iq>
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綜上所述，解決方案如下：
一、關(guān)閉openFire的匿名登錄功能。^_^……
二、禁止GLOOX匿名認(rèn)證功能。
file:client.cpp
fun: int Client::getSaslMechs( Tag* tag )
line:423
//將423行注釋掉即可。
422：if( tag->hasChildWithCData( mech, "ANONYMOUS" ) )
423 //mechs |= SaslMechAnonymous;
重新編譯生成DLL即可。三、手動(dòng)設(shè)置GLOOX客戶端SASL認(rèn)證機(jī)制
在調(diào)用j->connect()之前設(shè)置SASL認(rèn)證機(jī)制，比如設(shè)置為“DIGEST-MD5”
j->setSASLMechanisms(SaslMechDigestMd5);
這種方式的缺點(diǎn)是需要先確定服務(wù)器支持的認(rèn)證機(jī)制。四、根據(jù)XEP-0077所述，即使其名登錄，注冊(cè)流只要不帶“from”屬性應(yīng)該也可以。所以我們要處理發(fā)出的注冊(cè)流，去除“from”屬性重新發(fā)送注冊(cè)流即可。
本文轉(zhuǎn)自：http://blog.csdn.net/abcpanpeng/article/details/7370974
posted on 2014-08-28 17:59
王海光 閱讀(1559)
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