Lightstreamer communication with Autoit - (Moved)

Cinemizer · May 23, 2020

Hi,

I want to write an Autoit program, to receive live streaming data from an Lightstreamer server.

If I start following command in cmd.exe on Windows10 PC, it works and the server reply.

curl -v -N -X POST -d "LS_adapter_set=WELCOME&LS_cid=mgQkwtwdysogQz2BJ4Ji%20kOj2Bg&LS_send_sync=false" http://push.lightstreamer.com/lightstreamer/create_session.txt?LS_protocol=TLCP-2.1.0

But how can I post and receive live stream with Autoit ?

I already so far, that I can send a POST or GET message to a server, but this kind of communication ends the connection, after the server answered. No streaming data can be received after it.
I tryed also a socket communication, but it also not works, because I can define there only an IP Address but nothing like "http://push.lightstreamer.com/lightstreamer/create_session.txt?LS_protocol=TLCP-2.1.0". It seems a socket communication is usable only for direct connection to a server over IP and Port Numbers.

Please send me an Autoit example how to solve this problem.

THX!

Melba23 · May 23, 2020

Moved to the appropriate forum.

Moderation Team

Danp2 · May 23, 2020

Not the example you were hoping for, but have you looked into using the WinHttp UDF?

argumentum · May 23, 2020

6 hours ago, Cinemizer said:

http://push.lightstreamer

..a can of worms. HTTP is one thing but then you'll wanna do all this with HTTPS and that is another can of worms. You may want to do WebSockets and there we go again.
When ppl ask me what coding language I use, my answer is "the one that can get the project out of my hair the easiest".
AutoIt my not be that language for this, right now.
Now if you ( or someone ), wanna translate WebSockets to TCP/IP in AutoIt ( and that is perfectly possible ), then yes, have a go in AutoIt. ( my 2 cents )

Cinemizer · May 23, 2020

Hi,

Thx, Danp2 !

WinHttp UDF is a good idea, I tested it, seems to work fine with http sites, but does not work with https.

I tryed this:

If I connect to: http://www.google.com it works, data is coming.

But if I want to connect with it to https://www.google.com

nothing comes.

Why not ? Does the WinHTTP really not support https sites ?

Can you recommend me something similar, an UDF which is supporting https or how can I connect with WinHTTp https sites ?

THX !

argumentum · May 23, 2020

1 minute ago, Cinemizer said:

Can you recommend me something similar, an UDF which is supporting https

..read the help file that is distributed with the UDF. It does handle HTTPS.

Cinemizer · May 23, 2020

It is interesting.

My code is this:

;*****************************************************************
#include "WinHttp.au3"

Local $hOpen = _WinHttpOpen()

Local $hConnect = _WinHttpConnect($hOpen, "https://www.google.com")
Local $hRequest = _WinHttpOpenRequest($hConnect, Default, "")
_WinHttpSendRequest($hRequest)
_WinHttpReceiveResponse($hRequest)
$sHeader = _WinHttpQueryHeaders($hRequest)

MsgBox(0, "Header", $sHeader)

_WinHttpCloseHandle($hRequest)
_WinHttpCloseHandle($hConnect)
_WinHttpCloseHandle($hOpen)

If I open: "http://www.google.com" I get an answer, but if I open "https://www.google.com", no answer.

Why ? Where is the failure ?

THX !

Danp2 · May 23, 2020

I imagine it would help if you utilize the correct port. 😎 Try this --

Local $hConnect = _WinHttpConnect($hOpen, "https://www.google.com", $INTERNET_DEFAULT_HTTPS_PORT)

Cinemizer · May 24, 2020

THX Danp2 but this did not help.
Still no answer if I open: _WinHttpConnect($hOpen, "https://www.google.com", $INTERNET_DEFAULT_HTTPS_PORT)

But if I open _WinHttpConnect($hOpen, "http://www.google.com",1234) is working,
I mean, it seems not to affect anything, what I write at the end for $iServerPort. It is working with 1234 or with 5555, does not matter, what I write there.
Do you have any other idea ?

Could you try my script, if it is working/not working same way at you ?

THX !

Jos · May 24, 2020

Try this version:

#include "WinHttp.au3"
Local $hOpen = _WinHttpOpen()
Local $hConnect = _WinHttpConnect($hOpen, "www.google.com")
ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $hConnect = ' & $hConnect & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

Local $hRequest = _WinHttpOpenRequest($hConnect, Default, "/")
ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $hRequest = ' & $hRequest & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

_WinHttpSendRequest($hRequest)
ConsoleWrite('@@ Debug(>Error code: ' & @error & @CRLF) ;### Debug Console

_WinHttpReceiveResponse($hRequest)
ConsoleWrite('@@ Debug(>Error code: ' & @error & @CRLF) ;### Debug Console

$sHeader = _WinHttpQueryHeaders($hRequest)
ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $sHeader = ' & $sHeader & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

_WinHttpCloseHandle($hRequest)
_WinHttpCloseHandle($hConnect)
_WinHttpCloseHandle($hOpen)

Jos

Cinemizer · May 24, 2020

Thx for the script.

I have tested it and is still not working, if I open with https://
________________________________________________________

#include "WinHttp.au3"
Local $hOpen = _WinHttpOpen()
Local $hConnect = _WinHttpConnect($hOpen, "https://www.google.com")
ConsoleWrite('@@ Debug1(' & @ScriptLineNumber & ') : $hConnect = ' & $hConnect & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

Local $hRequest = _WinHttpOpenRequest($hConnect, Default, "/")
ConsoleWrite('@@ Debug2(' & @ScriptLineNumber & ') : $hRequest = ' & $hRequest & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

_WinHttpSendRequest($hRequest)
ConsoleWrite('@@ Debug3(>Error code: ' & @error & @CRLF) ;### Debug Console

_WinHttpReceiveResponse($hRequest)
ConsoleWrite('@@ Debug4(>Error code: ' & @error & @CRLF) ;### Debug Console

$sHeader = _WinHttpQueryHeaders($hRequest)
ConsoleWrite('@@ Debug5(' & @ScriptLineNumber & ') : $sHeader = ' & $sHeader & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

_WinHttpCloseHandle($hRequest)
_WinHttpCloseHandle($hConnect)
_WinHttpCloseHandle($hOpen)

________________________________________________________________

I get this answer in console:

@@ Debug1(4) : $hConnect = 0x0119A810
>Error code: 0
@@ Debug2(7) : $hRequest = 0x011BB948
>Error code: 0
@@ Debug3(>Error code: 0
@@ Debug4(>Error code: 1
@@ Debug5(16) : $sHeader =
>Error code: 1
>Exit code: 0 Time: 0.4141

____________________________________________________________________________

My problem is not, that I can not open google with https, this address is only for testing.
I want to open an other site, which does not work with http, only with https, that´s why I am testing with "https://www.google.com"
I guess, as soon it works with "https://www.google.com", my other link will also work.

Please help to solve this.

THX !

Jos · May 24, 2020

Ok ...got you. what about this version:

#include "WinHttp.au3"
Local $hOpen = _WinHttpOpen()
Local $hConnect = _WinHttpConnect($hOpen, "https://www.google.com")
ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $hConnect = ' & $hConnect & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

$hRequest = _WinHttpSimpleSendSSLRequest($hConnect, "GET", "/")
ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $hRequest = ' & $hRequest & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

$sHeader = _WinHttpQueryHeaders($hRequest)
ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $sHeader = ' & $sHeader & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console

_WinHttpCloseHandle($hRequest)
_WinHttpCloseHandle($hConnect)
_WinHttpCloseHandle($hOpen)

Jos

Edited May 24, 2020 by Jos

Cinemizer · May 24, 2020

That´s fine, https server is answering ! Thank you very much.

I want to connect a server, getting real time data.

For that my code is continuing after Local $sHeader = _WinHttpQueryHeaders($hRequest)
with:

____________________________________________________________________

While 1

   $nMsgArray = GUIGetMsg(1)

   _WinHttpReceiveResponse($hRequest)

   If _WinHttpQueryDataAvailable($hRequest) = 1 Then
      $data=_WinHttpSimpleReadData($hRequest)
      GUICtrlSetData ($ReturnAnswer_LabelID, $data)               ;Writing data onto a label to visualise it
   EndIf

   If $nMsgArray[0]<>0 Then   ; Exiting if window was closed

      Switch $nMsgArray[0]

        Case $GUI_EVENT_CLOSE
            GUIDelete($hGUI)
            Exit

      EndSwitch

   EndIf

WEnd

This reports me continously, that data has been received, but there is coming nothing.

Somehow the < If _WinHttpQueryDataAvailable($hRequest) = 1 Then > part does not work.

I have red in the WinHTTP.au3 comments, that _WinHttpReceiveResponse($hRequest) must be called before _WinHttpQueryDataAvailable() will be called, but it semms not to work.

Do you have an idea, how can I test if data has been received and read data into a $variable ?

Many THX!

Edited May 24, 2020 by Jos
please use the codebox <> for source code :)

Danp2 · May 24, 2020

If you look at the coding for _WinHttpSimpleReadData, it is already calling _WinHttpQueryDataAvailable. I also think you need to drop the call to _WinHttpReceiveResponse. Does this work for you?

While 1

   $nMsgArray = GUIGetMsg(1)

   $data=_WinHttpSimpleReadData($hRequest)
   If Not @error Then
      GUICtrlSetData ($ReturnAnswer_LabelID, $data)               ;Writing data onto a label to visualise it
   EndIf

   If $nMsgArray[0]<>0 Then   ; Exiting if window was closed

      Switch $nMsgArray[0]

        Case $GUI_EVENT_CLOSE
            GUIDelete($hGUI)
            Exit

      EndSwitch

   EndIf

WEnd

Cinemizer · May 24, 2020

Hi, good idea, but also this suggested version from you:

________________________________________________________________________________

$data=_WinHttpSimpleReadData($hRequest)
   If Not @error Then
      GUICtrlSetData ($ReturnAnswer_LabelID, $data)               ;Writing data onto a label to visualise it
      MsgBox(0, "Data", $data)
   EndIf

_______________________________________________________________________________
is still signalising, as if a data would have been received, but nothing comes.
It means @error is every time <>0, and MsgBox(0, "Data", $data) is coming up in every cycle.
I know well, that I sent to the server such a message, which is not complete, so the server would not send me anything.
Server sends me only a Header and a type of "Hello, I am here" message, that he understood my message, but does not send me anything.

I tryed and this solution works:

If Stringlen($data)<>0 Then...

It seems, that "If Not @error Then..." does not work.
In WinHTTP.au3 at _WinHttpSimpleReadData
if no datareceived, it returns: Return SetError(2, 0, $vData)
It means @error should be 2 if no data came.

Bit interesting, that also
If @error<>2 Then...
does not work. I do not know, why.

Main thing, I have now a solution for it.

THX for helping !

Cinemizer · May 27, 2020

Hi,

I need more help please.

I want to create a session on lightstreamer server.

If I write following in cmd.exe on windows:

curl -v -N -X POST -d "LS_adapter_set=WELCOME&LS_cid=mgQkwtwdysogQz2BJ4Ji%20kOj2Bg&LS_send_sync=false" http://push.lightstreamer.com/lightstreamer/create_session.txt?LS_protocol=TLCP-2.1.0

I get a response from the server.

CONOK,session number, x, x, *

But if I run following script below, I do not get back anything. Why not ? Where is the failure ?

_________________________________________________________________________________________________

Local $hOpen = _WinHttpOpen()
Local $hConnect = _WinHttpConnect($hOpen, "http://push.lightstreamer.com/lightstreamer/create_session.txt?LS_protocol=TLCP-2.1.0")
Local $hRequest = _WinHttpOpenRequest($hConnect, "POST", "LS_adapter_set=WELCOME&LS_cid=mgQkwtwdysogQz2BJ4Ji%20kOj2Bg&LS_send_sync=false")

Local $sHeader = _WinHttpQueryHeaders($hRequest)

While 1

$nMsgArray = GUIGetMsg(1)

   $data=_WinHttpSimpleReadData($hRequest)
   If Stringlen($data)<>0 Then
      GUICtrlSetData ($ReturnAnswer_LabelID, $data)               ;Writing data onto a label to visualise it
   EndIf

If $nMsgArray[0]<>0 Then

Switch $nMsgArray[0]

       Case $GUI_EVENT_CLOSE ; If X was pressed on the upper right corner
            GUIDelete($hGUI)
            Exit

EndSwitch

EndIf

WEnd

_____________________________________________________________________________________________
Can you please test the curl line abowe and send me a correct script, which gives me the CONOK answer including the sessionID ?

THX !

Danp2 · May 27, 2020

@Cinemizer I'm not an expert with the WinHttp UDF, but I get the feeling that you are doing a couple of things incorrectly --

- You are opening the request, but not actually sending it. See example in help file for _WinHttpOpenRequest where there is a call to _WinHttpSendRequest

- Not sure that you can use the standard and "simple" functions interchangeably.

HTH, Dan

P.S. When you post code in the future please use Code tags - see here how to do it. Then you get a scrolling box, syntax coloring, etc

Lightstreamer communication with Autoit - (Moved)

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