Calling REST API from AX 2012

As we know, JSON is not supported by AX 2012, and calling REST API is challenging.  The alternate way is to use XML webRequest below is the code, which calls the API and gets the response as a string. The code also reads the response and displays it in the info log.

 Here is the code to call REST API from AX 2012

static void Send_RestAPI(Args _args)

{

    System.IO.Stream streamstr,responsestr;

    System.IO.StreamWriter streamWriter;

    System.Net.HttpWebRequest request;

    System.Net.WebHeaderCollection headers;

    System.Net.HttpWebResponse response;

    System.IO.StreamReader reader;

    str wsResponse;

    str xml;

    str                                 xmlOut;

    //

    XmlDocument     xmlDocument;

    XmlNodeList     xmlScriptList;

    XmlNodeList     xmlResponseList;

    XmlElement      nodeScript;

    XmlElement      nodeResponse;

    XMLParseError   xmlError;

     // Define temporary variables

    str _xmlMsg;

    int i, j;

    ;

    new InteropPermission(InteropKind::ClrInterop).assert();

    try

    {

        // request url

        request = System.Net.WebRequest::Create('https://api.xxxxxx.net/1.0/Tokenxxx') as  System.Net.HttpWebRequest;

        // http method

        request.set_Method('Post');

        // headers

        request.set_ContentType("application/xml; charset=utf-8");

        // request body

         xml =

            "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +

            "<RequestToken xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">" +

            "<grant_type>asaasass</grant_type>" +

            "<username>asasadsdsdd</username>" +

            "<password>******</password>" +

            "</RequestToken>";

        streamstr = request.GetRequestStream();

        streamWriter = new System.IO.StreamWriter(streamstr);

        streamWriter.Write(xml);

        streamWriter.Flush();

        streamWriter.Close();

        streamWriter.Dispose();

        // response

        response = request.GetResponse();

        reader = new System.IO.StreamReader(response.GetResponseStream());

        wsResponse = reader.ReadToEnd();

       // --------------------- READ FROM XML-----------------

       xmlDocument             = XmlDocument::newXml(wsResponse);

         // Get the root element and its child nodes

       nodeScript = xmlDocument.getNamedElement("Tokenxx");

       xmlScriptList = nodeScript.childNodes();

       for(i=0; i < xmlScriptList.length(); i++)

        {

            nodeResponse = xmlScriptList.item(i);

            if (nodeResponse.nodeName() == 'rexxxToken')

            {

                 info(strFmt("rToken: %1", nodeResponse.text()));

            }

            if (nodeResponse.nodeName() == 'axxxtoken')

            {

                info(strFmt("axxxtoken: %1", nodeResponse.text()));

            }

            if (nodeResponse.nodeName() == 'expiresIn')

            {

                  info(strFmt("exxxIn: %1", nodeResponse.text()));

            }

            //xmlResponseList = nodeResponse.childNodes();

            //if(nodeResponse.selectSingleNode('refreshToken'))

          /*  if (i == 0)

                info(strFmt("refreshToken: %1", nodeResponse.text()));//innerText()));//text()));

            if (i == 1)

                 info(strFmt("access_token: %1", nodeResponse.text()));

            if (i == 2)

                 info(strFmt("expiresIn: %1", nodeResponse.text()));*/

        }

        // --------------------- READ FROM XML-----------------

        //

        reader.Close();

        //info(wsResponse);

    }

    catch (Exception::CLRError)

    {

        throw error(AifUtil::getClrErrorMessage());

    }

    CodeAccessPermission::revertAssert();

}