Problem reading in a PDF file from sftp server to embed in message

[rutledj]

I need to read in a pdf file from an sftp server and embed it in an OBX segment. I had this working fine when I was able to read from a local folder, but it now has to work from an sftp folder and I can't get it to work. The error I get makes no sense to me.

Calling code. I get the streamPDF file back but when I call FileUtil.encode(byteArray); it fails

var byteArray = sftpGet(SFTP_HOST,22,SFTP_USER,SFTP_PASS,SFTP_DIR,$('pdfName'));
logger.info('PDF ' + byteArray);
var encodedPDF = FileUtil.encode(byteArray).replaceAll('\r\n|\r|\n', ''); 

logger.info('got Encode ' + encodedPDF);
tmp['OBX']['OBX.1']['OBX.1.1'] = '1';
tmp['OBX']['OBX.2']['OBX.2.1'] = 'ED';
tmp['OBX']['OBX.5']['OBX.5.3'] = 'PDF';
tmp['OBX']['OBX.5']['OBX.5.4'] = 'PDF'; 
tmp['OBX']['OBX.5']['OBX.5.5'] = encodedPDF;

sftp read function:

function sftpGet(ip,port,user,pass,dir,pdfFileName)
{
	importPackage(com.jcraft.jsch);
	importPackage(java.io);
	importPackage(java.lang);
	importPackage(java.nio.charset);
	
	function toByteArray(str)
	{
		var bytes = [];
		for (var i = 0; i < str.length; ++i) 
		{
    			bytes.push(str.charCodeAt(i));
		}
		return bytes;
	}
	
	//create object.
	var jsch = new JSch();
	jsch.setConfig('StrictHostKeyChecking','no');
	var session = jsch.getSession(user,ip,port);
	session.setPassword(pass);
	session.setTimeout(2000);
	session.connect();
	var channel = session.openChannel('sftp');
	var ioexception = new Packages.java.io.IOException;
	channel.connect();
	logger.info('Connected to SFTP: ');
	
	channel.cd(dir); //Folder on the SFTP server where file will be found
	var counter
	var directoryList = channel.ls("*.pdf");
	if (directoryList.size() > 0)
	{
		for(var i=0; i<directoryList.size();i++) 
		{
			var filename = directoryList.get(i).getFilename();
			if(filename == pdfFileName)
			{
				var is = channel.get(filename);
				var bReader = new BufferedReader(new InputStreamReader(is));
				var sbfFileContents = "";
				var line;
				//read file line by line
		               while((line = bReader.readLine())!=null&&line.length()!=0)
		               {
	        			sbfFileContents+=line;
				}
				
				var byteArray = toByteArray(sbfFileContents);
				break;
		}   
	  }
	}
	
	//Close everything down
	channel.disconnect();
	session.disconnect();	
	return byteArray;
}

I get this weird error. I'm assuming it is an error within that FileUtil.encode function as the logger statements after it never execute.

ERROR MESSAGE: Error evaluating transformer
com.mirth.connect.server.MirthJavascriptTransformerException: 
CHANNEL:	CareTeam Hub sFTP - 15339
CONNECTOR:	sourceConnector
SCRIPT SOURCE:	TRANSFORMER
SOURCE CODE:	
294: 		tmp['OBX']['OBX.5']['OBX.5.5'] = encodedPDF;
295: 		logger.info('finished');
296: 	}
297: 	catch(er)
298: 	{
299: 		$('ProcessMessage') = false;
300: 		var errMsg = 'Error in channel: ' + channelName + ', trying to read in PDF file ' + $('pdfName') + '. Error:  ' + er.toString();
301: 		logger.error(errMsg);
302: 		
303: 		//SendEmail('mike.rutledge@interwellhealth.com', 'Care Team Hub channel error', errMsg);
LINE NUMBER:	299
DETAILS:	ReferenceError: Function 
function $(string) {
    try {
        if (responseMap.containsKey(string)) {
            return $r(string);
        }
    }
    catch (e) {
    }
    try {
        if (connectorMap.containsKey(string)) {
            return $co(string);
        }
    }
    catch (e) {
    }
    try {
        if (channelMap.containsKey(string)) {
            return $c(string);
        }
    }
    catch (e) {
    }
    try {
        if (sourceMap.containsKey(string)) {
            return $s(string);
        }
    }
    catch (e) {
    }
    try {
        if (globalChannelMap.containsKey(string)) {
            return $gc(string);
        }
    }
    catch (e) {
    }
    try {
        if (globalMap.containsKey(string)) {
            return $g(string);
        }
    }
    catch (e) {
    }
    try {
        if (configurationMap.containsKey(string)) {
            return $cfg(string);
        }
    }
    catch (e) {
    }
    try {
        if (resultMap.containsKey(string)) {
            return resultMap.get(string);
        }
    }
    catch (e) {
    }
    return "";
}
 can not be used as the left-hand side of assignment or as an operand of ++ or -- operator.
	at efecdfa2-cdec-4f5d-a0d5-40aeca09d1d0_JavaScript_Filter_Transformer_0:299 (doTransform)
	at efecdfa2-cdec-4f5d-a0d5-40aeca09d1d0_JavaScript_Filter_Transformer_0:494 (doScript)
	at efecdfa2-cdec-4f5d-a0d5-40aeca09d1d0_JavaScript_Filter_Transformer_0:496
	at com.mirth.connect.server.transformers.JavaScriptFilterTransformer$FilterTransformerTask.doCall(JavaScriptFilterTransformer.java:235)
	at com.mirth.connect.server.transformers.JavaScriptFilterTransformer$FilterTransformerTask.doCall(JavaScriptFilterTransformer.java:187)
	at com.mirth.connect.server.util.javascript.JavaScriptTask.call(JavaScriptTask.java:114)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

[rutledj]

Before I was using this code and it worked when reading from a local folder

var pdfFile = FileUtil.readBytes(folder + $('pdfName'));
		
		var encodedPDF = FileUtil.encode(pdfFile).replaceAll('\r\n|\r|\n', '');  

Not sure if the byte array I'm sending FileUtil.encode from the sftp reader function is different than the bytearray FileUtil.readBytes returns.

[pacmano1]

I am not sure it is a weird message

$('ProcessMessage') = false;

should be:

$c('ProcessMessage',false) // or whatever map variable type it is.

[rutledj]

Thanks. That was hiding the real error which was this line copied from some online code

var FileUtil = Packages.com.mirth.connect.server.util.FileUtil;

commented that out and it now works.