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Stefan
 
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Joined: Mon Feb 05, 2018 9:44 pm

The data transmission of long strings takes a long time

by Stefan Mon Jan 28, 2019 8:44 am

My server sends a string with 720000 characters to my spider client.
Firefox takes a long time to receive the string, more than 30 seconds, and displays the message: "The website slows down your browser, what should be done?"
My test environment is on a machine (server and client), so I think the transfer should be really fast.
Is this a bug?
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Peter
 
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Re: The data transmission of long strings takes a long time

by Peter Mon Jan 28, 2019 9:23 am

Stefan wrote:Is this a bug?

As always: no one can make a statement about this without seeing a short, fully functional code that demonstrates this behavior.
Fred
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Re: The data transmission of long strings takes a long time

by Fred Mon Jan 28, 2019 9:25 am

That seems to be very slow.. I don't think it's a bug SB side tbh, could you try to do a small snippet ?
the.weavster
 
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Re: The data transmission of long strings takes a long time

by the.weavster Mon Jan 28, 2019 9:57 am

Is the text coming from your server from a script you've created?
If so you could look at using chunked transfer encoding
Stefan
 
Posts: 57
Joined: Mon Feb 05, 2018 9:44 pm

Re: The data transmission of long strings takes a long time

by Stefan Mon Jan 28, 2019 11:28 am

Procedure onMessage(evt)

Protected MessageFromWs.s

! v_messagefromws = v_evt.data;

;It takes about 30 seconds until the whole string (MessageFromWs) has arrived

;This procedure processes messages (strings)
checkMessage(MessageFromWs)

EndProcedure
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Peter
 
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Re: The data transmission of long strings takes a long time

by Peter Mon Jan 28, 2019 12:27 pm

Image

Peter wrote:[...] without seeing a short, fully functional code that demonstrates this behavior.

It seems that you are not really interested in someone helping you...
Fred
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Re: The data transmission of long strings takes a long time

by Fred Mon Jan 28, 2019 1:27 pm

Yes, would be helpful to have a fully working snippet, especially if you add some inline JS :)
Stefan
 
Posts: 57
Joined: Mon Feb 05, 2018 9:44 pm

Re: The data transmission of long strings takes a long time

by Stefan Mon Jan 28, 2019 4:29 pm

Next try: ;)

Code: Select all


EnableExplicit

Declare initWebSocket(wsuri.s)
Declare checkMessage(aString.s)
Declare onOpen(evt)
Declare onError(evt)
Declare onMessage(evt)
Declare onClose(evt)
Declare doSend(aString.s)
Declare sende(aStr.s)








Structure Chat_Message
  Type.s
  Author.s
  Message.s
  Timestamp.q
EndStructure

Structure Chat_Username_Change
  Type.s
  Username.s
  Passwort.s
EndStructure

Structure Chat_Userlist
  Type.s
   List Username.s()
EndStructure



Global  starttime,endtime



initWebSocket("ws://doko-lounge.selfhost.eu:41401")




Procedure onClose(evt)
  Debug "onClose"
EndProcedure

Procedure onMessage(evt)
  Protected MessageFromWs.s
  ! v_messagefromws = v_evt.data;
  checkMessage(MessageFromWs)
EndProcedure

Procedure onError(evt)
  Debug "onError()"
EndProcedure
Procedure initWebSocket(wsuri.s)
  ! websocket = new WebSocket(v_wsuri);
  ! websocket.onopen = function(evt) { f_onopen(evt) };
  ! websocket.onclose = function(evt) { f_onclose(evt) };
  ! websocket.onmessage = function(evt) { f_onmessage(evt) };
  ! websocket.onerror = function(evt) { f_onerror(evt) };
EndProcedure

Procedure doSend(message.s)
  ! websocket.send(v_message);
EndProcedure

Procedure onOpen(evt)
  Debug "onOpen()"
EndProcedure


Procedure sende(aStr.s)
  Protected M.Chat_Message
  Protected JSONID.i
  Protected mess.s
 
  M\Author = "Noname"
  M\Message = astr
 
  M\Timestamp = Date()
  M\Type = "Message"
 
  JSONID = CreateJSON(#PB_Any)
 
  If JSONID <> 0
    InsertJSONStructure(JSONValue(JSONID), @M, Chat_Message)
    doSend( ComposeJSON(JSONID))
    FreeJSON(JSONID)
  EndIf
 
EndProcedure




Procedure checkMessage(aString.s)
  Protected.s     s,ls
  Protected       l
  Debug aString
  If FindString(aString,"<<verbunden>>")>0
    l=150000   ;Here you can change (test) the counts of characters
    ls=Str(l)
    s="<<spiderbasictest>>"+ls+"<</spiderbasictest>>"
    sende(s)
    Debug "sending: "+ s
  EndIf
 
  If FindString(aString,"Start receiving")>0
    starttime=ElapsedMilliseconds()
  EndIf
 
  If FindString(aString,"End receiving")>0
    endtime=ElapsedMilliseconds()-starttime
    Debug "Loadingtime: "+Str(endtime)+" ms"
  EndIf
 
 EndProcedure



the.weavster
 
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Re: The data transmission of long strings takes a long time

by the.weavster Tue Jan 29, 2019 8:04 am

Ah, WebSockets...

What do you have server side? I'm wondering if the server is sending the correct header to let FireFox know of the length of the data.
Stefan
 
Posts: 57
Joined: Mon Feb 05, 2018 9:44 pm

Re: The data transmission of long strings takes a long time

by Stefan Thu Feb 28, 2019 8:55 pm

Has anyone found a solution or recognized what the problem can be?
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