在iOS中从XMPP服务器检索已归档消息 [英] Retrieving Archived messages from XMPP server in ios
问题描述
我正在将XMPP功能集成到我的ios应用程序中，遇到了无法解决的问题. 问题是我无法从服务器获取存档的消息.我的客户能够登录，并且我已经成功测试了多个服务呼叫(发送，接收消息，获取有关用户的信息).
I am integrating XMPP functionality in my ios app and i came across a problem i cannot solve. The problem is i cannot get archived messages from the server. My client is able to log in and i have tested several service calls (send, receive messages, getting info about a user) with success.
发送时
<iq type='get' id='pref1'>
<pref xmlns='urn:xmpp:archive'/>
</iq>
响应是
SEND: <iq type="get"><pref xmlns="urn:xmpp:archive"/></iq>
RECV: <iq xmlns="jabber:client" type="error" to="1@iis2/ae76edc"><error code="501"
type="cancel"><feature-not-implemented xmlns="urn:ietf:params:xml:ns:xmpp-
stanzas"/</error></iq>
服务器管理员在激活归档后能够看到已归档的消息.
The server administrator is able to see the archived messages, as he activated archiving.
为了实现此功能，必须在服务器或客户端进行一些操作吗?可能是看到旧消息和服务器实际实现并支持XEP-0136是两个不同的事情吗?
Must something be done server or client side in order to achieve this functionality? Could it be that seeing old messages and the server actually implementing and supporting XEP-0136, are two different things?
推荐答案
在Swift 4中获取存档消息的示例
an example to get archived messages in Swift 4
声明并初始化变量XMPPMessageArchivingCoreDataStorage，在其中初始化XMPPStream
declares and initializes the variables XMPPMessageArchivingCoreDataStorage where I initialize the XMPPStream
var xmppMessageStorage: XMPPMessageArchivingCoreDataStorage?
var xmppMessageArchiving: XMPPMessageArchiving?
xmppMessageStorage = XMPPMessageArchivingCoreDataStorage.sharedInstance()
xmppMessageArchiving = XMPPMessageArchiving(messageArchivingStorage: xmppMessageStorage)
xmppMessageArchiving?.clientSideMessageArchivingOnly = true
xmppMessageArchiving?.activate(stream)
xmppMessageArchiving?.addDelegate(self, delegateQueue: DispatchQueue.main)
这样做，每当收到一条消息时，这将使它被存档，而无需执行其他任何操作.
doing this, whenever a message arrives, this will cause it to be archived without needing to do anything else.
然后，检索已归档的邮件
then, to retrieve the archived message
func RecibedMessageArchiving(idFriend: String) {
let JabberIDFriend = idFriend //id friend chat, example test1@example.com
let moc = xmppMessageStorage?.mainThreadManagedObjectContext
let entityDescription = NSEntityDescription.entity(forEntityName: "XMPPMessageArchiving_Message_CoreDataObject", in: moc!)
let request = NSFetchRequest<NSFetchRequestResult>()
let predicateFormat = "bareJidStr like %@ "
let predicate = NSPredicate(format: predicateFormat, JabberIDFriend)
request.predicate = predicate
request.entity = entityDescription
//jabberID id del usuario, cliente
var jabberIDCliente = ""
if let jabberj = globalChat.value(forKey: "jabberID"){
jabberIDCliente = jabberj as! String
}
do {
let results = try moc?.fetch(request)
for message: XMPPMessageArchiving_Message_CoreDataObject? in results as? [XMPPMessageArchiving_Message_CoreDataObject?] ?? [] {
var element: DDXMLElement!
do {
element = try DDXMLElement(xmlString: (message as AnyObject).messageStr)
} catch _ {
element = nil
}
let body: String
let sender: String
let date: NSDate
let isIncomings: Bool
if message?.body != nil {
body = (message?.body)!
} else {
body = ""
}
if element.attributeStringValue(forName: "to") == JabberIDFriend {
sender = jabberIDCliente
isIncomings = false
} else {
sender = "test2@example.com"
isIncomings = true
}
var m: [AnyHashable : Any] = [:]
m["msg"] = message?.body
print("body", message?.body)
print("test", element.attributeStringValue(forName: "to"))
print("test2", element.attributeStringValue(forName: "body"))
}
} catch _ {
//catch fetch error here
}
}
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