NAV 2009 R2 Classic Client post inform by API + JSON

kiyachu · 2019-09-23

Hi,

I am using NAV 2009 R2 classic client, would like to do an API post function to put PO Header and PO Line information to 3rd parties by using API + JSON. May I know how to do it? And how to get the response message from 3rd parties and showing success or error message to user / log into a table for user to check the transmission result.

Thanks!

SanderDk · 2019-09-23

Hi kiyachu,
I do believe with NAV 2009 you can only do SOAP service

kiyachu · 2019-09-23

Thanks, SanderDk

SOAP service means not API + JSON
or
I can carry out API + JSON via SOAP?

Any details post for that?
thanks a lot!

SanderDk · 2019-09-23

You cannot carry out json, SOAP is based on XML

Any details about what?
Setting up NAV service to run webservice?
Communication with NAV webservice?

ftornero · 2019-09-23

Hello @kiyachu,

In your NAV version if you publish an WS it is a SOAP one and the data interchanged are XML , but if you want to consume an external WS it could be SOAP/XML or REST/JSON.

What's it your case ?

Regards

kiyachu · 2019-09-24

Thanks SanderDk & ftornero

The 3rd parties software that I POST information to require REST/JSON.
So what workaround I can choose with NAV version 2009 SP1?
Any link I can follow to work the solution out, many thanks for your advise.

SanderDk · 2019-09-24

I misunderstood your answer
#delete

ftornero · 2019-09-24

Hello @kiyachu,

If I don't miss anything I think that you need to call a REST API from NAV, so you can do it with somethig like this:

    CREATE(WinHttp);
    WinHttp.Open('POST',url,FALSE);
    WinHttp.SetRequestHeader('Content-Type', 'application/json');
    WinHttp.Send(JsonTxt);
    ResponseStream := WinHttp.ResponseStream;
    ResponseBuffer.READ(ResponseStream);

Where the vars are:

ResponseStream	InStream		
ResponseBuffer	BigText
url	Text		1024
JsonTxt	Text		1024

WinHttp	Automation	'Microsoft WinHTTP Services, version 5.1'.WinHttpRequest

If the JSON to send it's bigger than 1024 you need to use some workaround like an XML node text.

Regards

kiyachu · 2019-09-25

HI ftornero,

Thanks for the code, may I have more e.g. where to state the API address, API key?
For the Post content, as per your suggestion, I use XML node text to store and then converse it to JSON format before send out?
May I have more code example for reference, many thanks!

ftornero · 2019-09-25

Hello @kiyachu,

The API address goes in the url variable.

If you need to pass the API key it depends of what it's the REST API expecting, this would be an example for HubSpot, but you must check the API documentation to be sure:

url := 'https://api.hubapi.com/contacts/v1/lists/all/contacts/all?&count=100&hapikey=' +hapikey;

And regarding the JSON part you need to build the structure like this:

  NodeText := XMLDoc.createTextNode('');
  NodeText.appendData('{ "product": {');
  NodeText.appendData( '"sku":"1234567890",');
  NodeText.appendData('"extension_attributes": { "stock_Item": {');
  NodeText.appendData( '"qty": 60');
  NodeText.appendData('},');
  NodeText.appendData('},');
  NodeText.appendData('},');
  NodeText.appendData('}');

Where the vars are:

Name	DataType	Subtype	Length
XMLDoc	Automation	'Microsoft XML, v3.0'.DOMDocument	
NodeText	Automation	'Microsoft XML, v3.0'.IXMLDOMText

And later on pas the value to the REST API.

WinHttp.Send(NodeText.nodeValue);

Regards

kiyachu · 2019-10-03

Hi ftornero,

I got an error of
"This Automation variable has not been instantiated.
You can instantiate it by either creating or assigning it."

Code :

IF ISCLEAR(WinHttp) THEN
CREATE(WinHttp);

url := 'https://jsonplaceholder.typicode.com/users';
WinHttp.Open('POST',url,FALSE);
WinHttp.SetRequestHeader('Content-Type', 'application/json');
WinHttp.Send(JsonTxt);
ResponseStream := WinHttp.ResponseStream;
ResponseBuffer.READ(ResponseStream);

NodeText := XMLDoc.createTextNode('');
NodeText.appendData('{ "id": "111",');
NodeText.appendData( '"name":"A",');
NodeText.appendData('"username": "X"');
NodeText.appendData('}');

WinHttp.Send(NodeText.nodeValue);

Variable
Name DataType Subtype Length
WinHttp Automation 'Microsoft WinHTTP Services, version 5.1'.WinHttpRequest
NodeText Automation 'Microsoft XML, v3.0'.IXMLDOMText
XMLDoc Automation 'Microsoft XML, v3.0'.DOMDocument

I use report to run it.
Version : NAV 2009 SP21 - Classic client

Pls comment, thanks!

ftornero · 2019-10-03

Hello @kiyachu ,

You need to creaste the XMLDoc before use it.

CREATE(XMLDoc);
NodeText := XMLDoc.createTextNode('');

Regards

kiyachu · 2019-10-09

Hi ftornero,

No error after adding create XMLDoc. Thanks!

Now, I would like to know where and how to get the response from server after I post information to server?
I would like to prompt a message to user for showing success or not and the ID #, how can I get those from response and show it to user as message box in NAV and/or write to a table for user to check whether the post action success or not for that ID#

Like this I got when I use postman for test of json content

ftornero · 2019-10-10

Hello @kiyachu ,

After sending the request you can get the response like this:

      ResponseStream := WinHttp.ResponseStream;

Where ResponseStream is a InStream variable.

Regards.

kiyachu · 2019-10-11

Hi ftornero,

How can we read ResponseStream and display it as message or store into a table?
I add "MESSAGE(FORMAT(ResponseStream))" at the end, but the message box show empty?
========================================
IF ISCLEAR(WinHttp) THEN
CREATE(WinHttp);

url := 'https://jsonplaceholder.typicode.com/users';
WinHttp.Open('POST',url,FALSE);
WinHttp.SetRequestHeader('Content-Type', 'application/json');
WinHttp.Send(JsonTxt);
ResponseStream := WinHttp.ResponseStream;
ResponseBuffer.READ(ResponseStream);

CREATE(XMLDoc);
NodeText := XMLDoc.createTextNode('');
NodeText.appendData('{ "id": "111",');
NodeText.appendData( '"name":"A",');
NodeText.appendData('"username": "X"');
NodeText.appendData('}');

WinHttp.Send(NodeText.nodeValue);
MESSAGE(FORMAT(ResponseStream)); //ADD FOR SHOWING RESPONSE

ftornero · 2019-10-11

Hello @kiyachu ,

You could get this InStream variable and fill a BigText with it:

      ResponseBuffer.READ(ResponseStream);

Where ResponseBuffer is the BigText var.

Later on you can deal with this var to show your message.

You can also write to a file and read the file to do the same.

Regards.

ChuChu · 2020-02-12

Hi ftornero,

I have followed this post and get it works on sending JSON API under NAV2009SP1 version.

Now my question is, how can I save the outstream as a text file, so that I can keep a copy on what I have send out (The POST content).

Many thanks! It is my last step for this customization!!!!!

ftornero · 2020-02-15

Hello @ChuChu ,

You can do something like this:

    i := 0;
    Fich.CREATE(Path+'data.json');
    WHILE i <= NodeText.length DO BEGIN
      Fich.WRITE(NodeText.substringData(i, 1));
      i := i + 1;
    END;
    Fich.CLOSE;

Where the variables are:

i is an Integer

Fich is a FILE

Path is a Text with the Path where you want to create the output file.

Regards

ChuChu · 2020-02-17

Hi ftornero,

Yes, it works fine for your coding.
Thank you very much!!!!

Regards

VishalAg · 2020-04-15

Hi @ftornero ,

I wanted to know if there is a way to send few rows and columns of a table based on filter through it instead of single value. If so, please help me with some example.

Thank You

ftornero · 2020-04-15

Hello @VishalAg

Yes, you can send the information you want but it depends on what the web service you are connected is expecting.

Regards.

azharsaeedkhan · 2020-11-23

Hello @ftornero
I am stuck in a situation where i have a long json response (i.e. > 1024 characters) from the service.
Can you please guide me how to handle such a long text, plus i have to manipulate the data using my logic which means that this data should be available in some variable, so i can use it further.

ftornero · 2020-11-23

Hello @azharsaeedkhan,

You can save the response how is displayed in the previous posts to a file and then read file with something like this, o save to a BigText variable and skip the file altogether.

ParseJson(Fichero : Text[1024];VAR Buffer : Record "Buffer JSON")
CLEAR(Buffer);
Buffer.DELETEALL;
// Put the file content to a BigText
Fich.TEXTMODE(FALSE);
Fich.WRITEMODE(FALSE);
Fich.OPEN(Fichero);
qLen := Fich.LEN;
Linea := '';
WHILE (Fich.POS < qLen) DO BEGIN
   Fich.READ(qChar);
   BgText.ADDTEXT(FORMAT(qChar));
END;

// Get the BigText char to char
esClave := TRUE;
key := '';
Value := '';
enComillas := FALSE;
nivel := 0;
p := 1;
l := BgText.LENGTH;

WHILE p < l DO BEGIN
  BgText.GETSUBTEXT(Aux, p, 1);
  CASE Aux OF
    ':': BEGIN  // Change from key to value
           IF enComillas THEN BEGIN
             IF esClave THEN
               key := key + Aux
             ELSE
               Value := Value + Aux;
           END ELSE
             esClave := FALSE
         END;
    ',': BEGIN  // New key - value pair
           IF enComillas THEN BEGIN
             IF esClave THEN
               key := key + Aux
             ELSE
               Value := Value + Aux;
           END ELSE BEGIN
             esClave := TRUE;
             IF key <> '' THEN
               InsLogTemp(Buffer, key, Value, nivel);
           END;
         END;
    '"': enComillas := NOT enComillas;
    '{': BEGIN
           nivel := nivel + 1;
           key := '';
           esClave := TRUE;
         END;
    '}': BEGIN
           IF key <> '' THEN
             InsLogTemp(Buffer, key, Value, nivel);
           nivel := nivel - 1;
         END;
    '[': BEGIN
           nivel := nivel + 1;
           //esClave := TRUE;
         END;
    ']': BEGIN
           nivel := nivel - 1;
         END;
//    '\': ;
    ELSE BEGIN
      // Add a kye or a value
      IF esClave THEN
        key := key + Aux
      ELSE
        Value := Value + Aux;
    END;
  END;
  p := p + 1;
END;
IF key <> '' THEN
  InsLogTemp(Buffer, key, Value, nivel);

Where table "Buffer JSON" is a temporary table with this structure:

And the function InsLogTemp is this one:

InsLogTemp(VAR Buffer : Record "Buffer JSON";VAR Clave : Text[1024];VAR Valor : Text[1024];nivel : Integer)
IF Buffer.FINDLAST THEN
  Buffer.NMov := Buffer.NMov + 1
ELSE
  Buffer.NMov := 1;

Buffer.Nivel := nivel;
Buffer.Clave := COPYSTR(Clave, 1, MAXSTRLEN(Buffer.Clave));
Buffer.Valor := COPYSTR(Valor, 1, MAXSTRLEN(Buffer.Valor));
Buffer.INSERT;
Clave := '';
Valor := '';

After that you can read the "Buffer JSON" table and deal with the values in there.

Regards

ftornero · 2020-11-23

The local variables in ParseJson:

Name	DataType	Subtype	Length
Fich	File		
key	Text		1024
Value	Text		1024
p	Integer		
l	Integer		
qLen	Integer		
Linea	Text		1024
BgText	BigText		
qChar	Char		
Aux	Text		1
esClave	Boolean		
enComillas	Boolean		
nivel	Integer

azharsaeedkhan · 2020-11-30

ftornero wrote: »

Hello @azharsaeedkhan,

You can save the response how is displayed in the previous posts to a file and then read file with something like this, o save to a BigText variable and skip the file altogether.

ParseJson(Fichero : Text[1024];VAR Buffer : Record "Buffer JSON")
CLEAR(Buffer);
Buffer.DELETEALL;
// Put the file content to a BigText
Fich.TEXTMODE(FALSE);
Fich.WRITEMODE(FALSE);
Fich.OPEN(Fichero);
qLen := Fich.LEN;
Linea := '';
WHILE (Fich.POS < qLen) DO BEGIN
   Fich.READ(qChar);
   BgText.ADDTEXT(FORMAT(qChar));
END;

// Get the BigText char to char
esClave := TRUE;
key := '';
Value := '';
enComillas := FALSE;
nivel := 0;
p := 1;
l := BgText.LENGTH;

WHILE p < l DO BEGIN
  BgText.GETSUBTEXT(Aux, p, 1);
  CASE Aux OF
    ':': BEGIN  // Change from key to value
           IF enComillas THEN BEGIN
             IF esClave THEN
               key := key + Aux
             ELSE
               Value := Value + Aux;
           END ELSE
             esClave := FALSE
         END;
    ',': BEGIN  // New key - value pair
           IF enComillas THEN BEGIN
             IF esClave THEN
               key := key + Aux
             ELSE
               Value := Value + Aux;
           END ELSE BEGIN
             esClave := TRUE;
             IF key <> '' THEN
               InsLogTemp(Buffer, key, Value, nivel);
           END;
         END;
    '"': enComillas := NOT enComillas;
    '{': BEGIN
           nivel := nivel + 1;
           key := '';
           esClave := TRUE;
         END;
    '}': BEGIN
           IF key <> '' THEN
             InsLogTemp(Buffer, key, Value, nivel);
           nivel := nivel - 1;
         END;
    '[': BEGIN
           nivel := nivel + 1;
           //esClave := TRUE;
         END;
    ']': BEGIN
           nivel := nivel - 1;
         END;
//    '\': ;
    ELSE BEGIN
      // Add a kye or a value
      IF esClave THEN
        key := key + Aux
      ELSE
        Value := Value + Aux;
    END;
  END;
  p := p + 1;
END;
IF key <> '' THEN
  InsLogTemp(Buffer, key, Value, nivel);

Where table "Buffer JSON" is a temporary table with this structure:

And the function InsLogTemp is this one:

InsLogTemp(VAR Buffer : Record "Buffer JSON";VAR Clave : Text[1024];VAR Valor : Text[1024];nivel : Integer)
IF Buffer.FINDLAST THEN
  Buffer.NMov := Buffer.NMov + 1
ELSE
  Buffer.NMov := 1;

Buffer.Nivel := nivel;
Buffer.Clave := COPYSTR(Clave, 1, MAXSTRLEN(Buffer.Clave));
Buffer.Valor := COPYSTR(Valor, 1, MAXSTRLEN(Buffer.Valor));
Buffer.INSERT;
Clave := '';
Valor := '';

After that you can read the "Buffer JSON" table and deal with the values in there.

Regards

Thank you for your detailed answer (Y)

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NAV 2009 R2 Classic Client post inform by API + JSON

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