從 ejabberd 服務器檢索 XMPP 存檔消息的問題（聊天記錄）

Question

我使用以下方法來檢索聊天記錄。

func getArchieveMessages(forUser user:String){
    let xmppMAM = XMPPMessageArchiveManagement.init()
    xmppMAM.addDelegate(self, delegateQueue: .main)
    xmppMAM.activate(stream)
    let xmppDateString = NSDate().addingTimeInterval(-(3 * 24 * 60 * 60)).xmppDateTimeString
    var fields: [XMLElement] = []
    let start = XMPPMessageArchiveManagement.field(withVar: "end", type: nil, andValue: xmppDateString)
    fields.append(start)
     let value = DDXMLElement(name: "value", stringValue: user)
     let child = DDXMLElement(name: "field")
     child.addChild(value)
     child.addAttribute(withName: "var", stringValue: "with")
     let set = XMPPResultSet(max: 20, before: "")
    fields.append(child)
    xmppMAM.retrieveMessageArchive(at: nil, withFields: fields, with: set)
}

調用此函數后，我收到了兩個代表。 即如果在 XMPPResultSet 中給出 20 條消息，我收到了 20 次xmppStreamDidFilterStanza(_ sender: XMPPStream)方法。

func xmppMessageArchiveManagement(_ xmppMessageArchiveManagement: XMPPMessageArchiveManagement, didFinishReceivingMessagesWith resultSet: XMPPResultSet) {
    print("didFinishReceivingMessagesWith", resultSet)
}
    func xmppStreamDidFilterStanza(_ sender: XMPPStream) {
    debugPrint("xmppStreamDidFilterStanza")
}

func xmppMessageArchiveManagement(_ xmppMessageArchiveManagement: XMPPMessageArchiveManagement, didFinishReceivingMessagesWith resultSet: XMPPResultSet) 中的響應

didFinishReceivingMessagesWith <set xmlns="http://jabber.org/protocol/rsm"><count>364</count><first>1603801030936227</first><last>1603948285226175</last></set>

但是這個方法永遠不會被調用。

func xmppMessageArchiveManagement(_ xmppMessageArchiveManagement: XMPPMessageArchiveManagement, didReceiveMAMMessage message: XMPPMessage) {
  if let body = message.mamResult?.forwardedMessage{
    print("didReceiveMAMMessage", body)
  }
    print("didReceiveMAMMessage", message)
}

如果有人遇到此問題並已解決或任何已知要解決的問題，請分享您的答案。

Answer 1

下面的代碼以前我用於消息獲取委托。 它完全錯誤

func xmppStream(_ sender: XMPPStream, willReceive message: XMPPMessage) -> XMPPMessage? {
 guard let body = (message.body?.replacingOccurrences(of: "\t", with: String.empty))?.replacingOccurrences(of: "\\s+$", with: String.empty, options: .regularExpression) else {
   return nil
 }
 debugPrint(body)
 return message
}

返回消息是獲取歷史消息所必需的。 以前我在guard let part中返回nil值

返回零

func xmppStream(_ sender: XMPPStream, willReceive message: XMPPMessage) -> XMPPMessage? {
 if let forwardedMessage = message.mamResult?.forwardedMessage{
   debugPrint(forwardedMessage)
   return message
 }
 guard let body = (message.body?.replacingOccurrences(of: "\t", with: String.empty))?.replacingOccurrences(of: "\\s+$", with: String.empty, options: .regularExpression) else {
   return nil
 }
 debugPrint(body)
 return message
}

Answer 2

根據您的代碼，我看到您沒有將 xmppMAM 保存在任何地方。 嘗試這個：

private var xmppMAM: XMPPMessageArchiveManagement?

func getArchieveMessages(forUser user:String){
    xmppMAM = XMPPMessageArchiveManagement.init()

    // Your code
}