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gloox代碼分析3 - 注冊模塊

#jabber協(xié)議中如何注冊一個(gè)用戶？
首先要與服務(wù)器建立一個(gè)連接, 在完成TLS握手之后就可以進(jìn)行注冊了,為什么不需要SASL握手呢?因?yàn)镾ASL握手只針對已經(jīng)注冊的用戶在登陸服務(wù)器的時(shí)候使用.(修改密碼和刪除用戶的時(shí)候需要SASL握手)
下面以openfire作為服務(wù)器，注冊一個(gè)用戶的過程如下:
(假設(shè)已經(jīng)完成了TLS握手)
1. ( C->S )
<stream:stream
    to='ziz-wrks-tfsxp1'
    xmlns='jabber:client'
    xmlns:stream='http://etherx.jabber.org/streams'
    xml:lang='en'
    version='1.0'>

TLS握手結(jié)束后, 發(fā)送新的'hello'消息

2. ( S->C )
<stream:stream
    xmlns:stream='http://etherx.jabber.org/streams'
    xmlns='jabber:client'
    from='ziz-wrks-tfsxp1'
    id='b691538a'
    xml:lang='en' version='1.0'/>

Server回應(yīng)Client的hello消息.

3. ( S->C )
<stream:features>
<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>

服務(wù)器支持的features(可以register)

4. ( C->S )
<iq type='get' id='uid1'>
<query xmlns='jabber:iq:register'/>
</iq>

客戶端請求注冊
5. ( S->C )
<iq type='result' id='uid1'>
<query xmlns='jabber:iq:register'>
    <username/>
    <password/>
    <email/>
    <name/>
    <x xmlns='jabber:x:data' type='form'>
      <title>XMPP Client Registration</title>
      <instructions>Please provide the following information</instructions>
      <field var='FORM_TYPE' type='hidden'>
        <value>jabber:iq:register</value>
      </field>
      <field label='Username' var='username' type='text-single'>
        <required/>
      </field>
      <field label='Full name' var='name' type='text-single'/>
      <field label='Email' var='email' type='text-single'/>
      <field label='Password' var='password' type='text-private'>
        <required/>
      </field>
    </x>
</query>
</iq>

服務(wù)器返回注冊需要的fields
(其中元素x里面的數(shù)據(jù)是擴(kuò)展性的數(shù)據(jù)表但，暫時(shí)忽略)

6. ( C->S )
<iq id='uid2' type='set'>
<query xmlns='jabber:iq:register'>
    <username>user3</username>
    <password>user@123</password>
    <name/>
    <email/>
</query>
</iq>

用戶提交注冊信息.

7. ( S->C )
<iq type='result' id='uid2' to='ziz-wrks-tfsxp1/b691538a'/>

服務(wù)器返回注冊結(jié)果

#如何更改用戶密碼
更改用戶密碼必須在完成與服務(wù)器的鏈接之后才能進(jìn)行，也就是完成與服務(wù)器的TLS,SASl握手之后
再進(jìn)行.

1. ( C->S )
<iq type='set' id='uid3'>
<query xmlns='jabber:iq:register'>
<username>user23</username>
<password>123456</password>
</query>
</iq>

發(fā)送更改密碼的請求

2. ( S->C )
<iq type='result' id='uid3' to='user23@ziz-wrks-tfsxp1/2f21fd1f'/>

返回處理結(jié)果(操作成功)

#如何注銷一個(gè)用戶
注銷一個(gè)用戶必須在完成與服務(wù)器的鏈接之后才能進(jìn)行，也就是完成與服務(wù)器的TLS,SASl握手之后
再進(jìn)行.

1. ( C->S )
<iq type='set' id='uid3' from='testuser@ziz-wrks-tfsxp1/3a418274'>
<query xmlns='jabber:iq:register'><remove/></query>
</iq>

發(fā)送注銷用戶的請求

2. ( S->S )

返回處理結(jié)果(注銷成功)

總結(jié):
注冊用戶和更改或者注銷用戶的一個(gè)區(qū)別就是注冊用戶不需要經(jīng)過SASL握手，而更改和注銷用戶需要.
也就是需要對用戶身份進(jìn)行驗(yàn)證.

gloox的注冊模塊
registration.h
registration.cpp
registrationhandler.h
就是對上述協(xié)議的封裝，方便創(chuàng)建register stanza,并把收到的消息分發(fā)到相應(yīng)的handler方法.

gloox的client是如何處理xml流的呢?
1. 連接到服務(wù)器后，使客戶端進(jìn)入"receive mode"，可以循環(huán)的接收數(shù)據(jù).
2. 數(shù)據(jù)流 [接收到的數(shù)據(jù) handleReceiveData() ] -> [解析xml數(shù)據(jù)流，解析成不同的tag, parser()] -> [ 觸發(fā)handleTag(), 針對不同的tag分發(fā)到不同的handlers做不同的處理 ]
- stream:stream - ...
- stream:error - ...
- Iq - IqHandler
- Presence - presenceHandler
- Message - messageHandler

Iq消息的處理機(jī)制，以及trackID機(jī)制:

實(shí)質(zhì)上registration是一個(gè)Iqhandler, 它實(shí)現(xiàn)的是handleIqID( Stanza *stanza, int context )接口，而不是handleIq( Stanza *stanza )接口，其中context實(shí)質(zhì)上為iqHandler具體實(shí)現(xiàn)中的子操作類型，在registration中分別為fetchRegisterFiled, createAccount, changePassword, removeAccount.

對一個(gè)Iq Stanza的處理方式可以通過一般的IqHandler - xmlnamespace filer或者IqHandler - TrackID機(jī)制來處理.

下面代碼展示了如何注冊/修改密碼/刪除用戶(服務(wù)器是openfire):

#include <iostream>
2

#include "registration.h" // gloox headers
3

#include "client.h"
4

#include "connectionlistener.h"
5

#include "logsink.h"
6

#include "loghandler.h"
7

#pragma comment( lib, "gloox.lib" )
9

using namespace gloox;
10

#define SERVERNAME "xxxxxx"
12

#define HEADERTO "xxxxxx"
13

#define USERNAME "user123"
15

#define PASSWORD "user@123"
16

#define NEWPASSWORD "123456"
17

//
19

// three scenario3
20

// 1 - register user (Note: don't need SASL handshake)
21

// 2 - change password (Note: need SASL handshake)
22

// 3 - delete user (Note: need SASL handshake)
23

//
24

class RegisterImpl : public RegistrationHandler, ConnectionListener, LogHandler {
25

public:
26

void run();
27

//implement RegistrationHandler
29

void handleRegistrationFields( const JID& from, int fields, std::string instructions );
30

void handleAlreadyRegistered( const JID& from );
31

void handleRegistrationResult( const JID& from, RegistrationResult regResult );
32

void handleDataForm( const JID& from, const DataForm &form );
33

void handleOOB( const JID& from, const OOB& oob );
34

//implement ConnectionListener
36

void onConnect();
37

void onDisconnect( ConnectionError e );
38

void onResourceBindError( ResourceBindError error );
39

void onSessionCreateError( SessionCreateError error );
40

bool onTLSConnect( const CertInfo& info );
41

void onStreamEvent( StreamEvent event );
42

//implement LogHandler
44

void handleLog( LogLevel level, LogArea area, const std::string& message );
45

private:
47

Registration* register_;
48

Client* client_;
49

};
50

void RegisterImpl::run() {
52

client_ = new Client(SERVERNAME);
53

client_->setHeaderTo(HEADERTO);
54

client_->registerConnectionListener(this);
55

register_ = new Registration( client_ );
56

register_->registerRegistrationHandler( this );
57

client_->logInstance().registerLogHandler( LogLevelDebug, LogAreaAll, this );
58

// run scenario2 and scenario3 need enable username and
60

// password to run SASL, scenario1 did not need.
61

client_->setUsername(USERNAME);
62

client_->setPassword(PASSWORD);
63

client_->connect();
65

delete register_;
67

delete client_;
68

}
69

void RegisterImpl::handleRegistrationFields( const JID& from, int fields, std::string instructions ) {
71

// register account
72

std::cout<<"impl# register instruction: "<<instructions<<std::endl;
73

RegistrationFields vals;
74

vals.username = USERNAME;
75

vals.password = PASSWORD;
76

register_->createAccount( fields, vals );
77

}
78

void RegisterImpl::handleAlreadyRegistered( const JID& from ) {
80

std::cout<<"impl# the count already exists."<<std::endl;
81

}
82

void RegisterImpl::handleRegistrationResult( const JID& from, RegistrationResult regResult ) {
84

if( regResult == RegistrationSuccess ) {
85

std::cout<<"impl# operation success."<<std::endl;
86

} else {
87

std::cout<<"impl# operation failed."<<std::endl;
88

}
89

client_->disconnect();
91

}
92

void RegisterImpl::handleDataForm( const JID& from, const DataForm &form ) {
94

//TODO:
95

}
96

void RegisterImpl::handleOOB( const JID& from, const OOB& oob ) {
98

//TODO:
99

}
100

101

void RegisterImpl::onConnect() {
102

std::cout<<"impl# connect to server success."<<std::endl;
103

//operation
104

105

// scenario1 - register
106

// this will invoke handleRegistrationResult() to createAccount
107

// Note: doesn't need SASL handshake
108

register_->fetchRegistrationFields();
109

110

// scenario2 - change password
111

// Note: need SASL handshake, in gloox, set the username & password in clientbase, will
112

// run the SASL handshake.
113

// register_->changePassword( client_->username(), NEWPASSWORD );
114

115

// scenario3 - delete account
116

// Note: need SASL handshake,
117

// register_->removeAccount();
118

}
119

120

void RegisterImpl::onDisconnect( ConnectionError e ) {
121

std::cout<<"impl# disconnected."<<std::endl;
122

}
123

124

void RegisterImpl::onResourceBindError( ResourceBindError error ) {
125

//TODO:
126

}
127

128

void RegisterImpl::onSessionCreateError( SessionCreateError error ) {
129

//TODO:
130

}
131

132

bool RegisterImpl::onTLSConnect( const CertInfo& info ) {
133

std::cout<<"impl# tls connect to server success."<<std::endl;
134

return true;
135

}
136

137

void RegisterImpl::onStreamEvent( StreamEvent event ) {
138

//TODO:
139

}
140

141

void RegisterImpl::handleLog( LogLevel level, LogArea area, const std::string& message ) {
142

std::cout<<"impl-log# "<<message<<std::endl;
143

}
144

145

int main( int argc, char* argv[] ) {
146

RegisterImpl impl;
147

impl.run();
148

return 0;
149

}

posted on 2008-11-06 12:59 ysong.lee 閱讀(4567) 評論(3) 編輯收藏引用

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# re: gloox代碼分析3 - 注冊模塊 2008-11-14 19:09 ly

hao 回復(fù) 更多評論

# re: gloox代碼分析3 - 注冊模塊 2008-11-14 19:13 ly

client_->setHeaderTo(HEADERTO);
錯(cuò)誤提示在client 里找不到setHeaderTo？？？？？什么問題？
我把你這句去掉后，改成
client_->disableRoster();
發(fā)現(xiàn)能注冊成功，但是，登陸提示：sasl failed。
登陸不成功！~~~什么原因~~~望解答！~~ 回復(fù) 更多評論

# re: gloox代碼分析3 - 注冊模塊 2008-11-18 13:01 ysong.lee

1. 我對gloox進(jìn)行了修改，client_->setHeaderTo(HEADERTO); 是自己添加的方法，目的是為了fix gloox不能連接到gtalk server的問題，通過修改，可以自己控制ClientBase::header()方法中在發(fā)送hello信息時(shí)候的to屬性，這在服務(wù)器是gtalk server的時(shí)候是有用的，如果我們的服務(wù)器地址設(shè)置為talk.google.com,則header()方法默認(rèn)to="talk.google.com"，這是錯(cuò)誤的，應(yīng)該為to="gmail.com".

2. sasl failed。登陸的時(shí)候需要sasl 驗(yàn)證，如果服務(wù)器為gtalk server, 當(dāng)你接收到服務(wù)器發(fā)送的以下信息的時(shí)候
(Server -> Client)
<stream:features>
<mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
<mechanism>PLAIN</mechanism>
<mechanism>X-GOOGLE-TOKEN</mechanism>
</mechanisms>
</stream:features>

需要進(jìn)行sasl驗(yàn)證，發(fā)送的驗(yàn)證數(shù)據(jù)格式為:
'\0'+username+'\0'+password 的base64編碼, username和password必須是經(jīng)過認(rèn)證的.
例如:
'\0' + 'ysong.lee@gmail.com' + '\0' + 123456 -> 經(jīng)過base64編碼處理
(Client -> Server)
<auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="PLAIN">
AHlzb25nLmxlZUBnbWFpbC5jb20AeXNvbmdAMTk4NA==
</auth>

3. 如果還有疑問，可以參考我的另外一篇文章“如何利用jabber協(xié)議與gtalk服務(wù)器通訊 - 建立會(huì)話”，里面詳細(xì)描述了如何登陸到gtalk服務(wù)器.

4. 做XMPP的程序，仔細(xì)閱讀從server到client和client的server的xml數(shù)據(jù)流，并參考標(biāo)準(zhǔn)協(xié)議，問題都可以解決:)，還有問題可以發(fā)email給我.

@ly
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gloox代碼分析3 - 注冊模塊

Feedback

# re: gloox代碼分析3 - 注冊模塊 2008-11-14 19:09 ly

# re: gloox代碼分析3 - 注冊模塊 2008-11-14 19:13 ly

# re: gloox代碼分析3 - 注冊模塊 2008-11-18 13:01 ysong.lee

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