在ios中从XMPP服务器检索存档消息

Question

我正在我的ios应用程序中集成XMPP功能,我遇到了一个我无法解决的问题.问题是我无法从服务器获取存档的消息.我的客户端能够登录并且我已经测试了几个服务调用(发送,接收消息,获取有关用户的信息),并且成功.

发送后

<iq type='get' id='pref1'>
  <pref xmlns='urn:xmpp:archive'/>
</iq>

回应是

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>

服务器管理员可以在激活归档时查看已归档的消息.

必须在服务器或客户端完成某些事情才能实现此功能吗？可能是看到旧消息和服务器实际实现和支持XEP-0136,是两回事吗？

Answer 1

在 Swift 4 中获取存档消息的示例

声明并初始化变量 XMPPMessageArchivingCoreDataStorage，我在其中初始化 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，每当消息到达时，都会将其存档，而无需执行任何其他操作。

然后，检索存档的消息

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
    }

}