Wednesday, January 30, 2013

[Apex / JavaScript] What is @RemoteAction? Baby don't hurt me, don't hurt me, no more!

2 hours to find out why @RemoteAction was hurting me.
This is related to Cloudspoke's challenge POC - Bootstrap Visualforce Pages (which I haven't submitted neither).

This is the controller:

@RemoteAction
    public static List queryContacts(List filters, String orderBy) {
    ...
    }

And this is the piece of javascript:

  var orderBy;
  var filters = [];
  function searchContacts()
  {
   var ob = orderBy;
   Visualforce.remoting.Manager.invokeAction(
              '{!$RemoteAction.MyPageController.queryContacts}',filters,ob,
              function(result, event){
               
                  if (event.status) {
                   
                   //result has the List of contacts
                   var contacts = result;
                   console.log(contacts);
                  } else if (event.type === 'exception') {
                       alert(event.message);
                  } else {
                    alert(result+ ' '+event.message);
                  }
              }, 
              {escape: true});
  }
It keeps sayng:
Visualforce Remoting Exception: Method 'queryContacts' not found on controller CSChallenge.MyPageController. Check spelling, method exists, and/or method is RemoteAction annotated.

The problem is the javascript variable "orderBy" that is "undefined"!!

By initializing it with:

     var orderBy = '';

@RemoteAction go smoothly.



Courtesy of Doombringer

Friday, January 25, 2013

[Salesforce / Canvas] Set up a minimum Canvas App (Java style)

This new post is about setting up a Force.com Canvas App and doing beautiful things with it. It comes from an old challenge I won (see Cloudspokes.com blog post), evenif in that case I used Javascript to get the session infos.

What is a Canvas App? In simple words it is a way to integrate external custom web application into Force.com platform, with simplified authorization process.
There are two ways of authentication:
  • OAuth 2.0 (GET)
  • Signed Request (POST)
I'm going to use the last method.

The first thing you have to do is creating a new "Connected App" in Setup->App Setup->Create->Apps->Connected Apps and press the "New" button.

Now set the mandatory fields:
  • Name: yuor application name
  • Contact email: your email
  • Callback URL: this is the callback URL used in the OAuth process. Simply set with the app URL
  • Selected OAuth Scopes: permissions associated to the injected session informations
  • Force.com Canvas: yes it is
  • Canvas App URL: endpoint of your app
  • Access method: Signed Request (POST)

For the sake of testing, you can set "http://localhost[:port]" as the endpoint.

Here is my configuration:



If you click in the "Chatter" tab you now see the new app:


The second step is to host a local web app.
To simplify your play here is a simple Java Play! Application that integrates with Force.com Canvas:

https://github.com/enreeco/CanvasApp-Base

To run the app simply follow my previous post [Java Play! / Heroku] Setup Java Play! + Heroku + Eclipse, for the Play part (if you want you can also use Heroku and configure the whole thing to use Heroku, but it can be a bit frustrating when developing, due to the loss of time in deploying).

How it works?

Salesforce call your app making a POST request, sending a "signed_request" parameter that is a big base64 encoded String in which all session infos are stored. This is an example:

jCblE7oIsZanRIeshRkJxtx2Dk1tS2tP3GWL0Yf1o+s=.eyJjb250ZXh0Ijp7InVzZXIiOn QiOmZhbHNlLCJjdXJyZW5jeUlzb0NvZGUiOiJFVVIifSwibGlua3MiOnsiZW50ZXJwcmlzZVVybCI6Ii 9zZXJ2aWNlcy9Tb2FwL2MvMjYuMC8wMERpMDAwMDAwMEg0bXUiLCJtZXRhZGF0YVVybCI6Ii9zZXJ2aW Nlcy9Tb2FwL20vMjYuMC8wMERpMDAwMDAwMEg0bXUiLCJwYXJ0bmVyVXJsIjoiL3NlcnZpY2VzL1NvYX IsImZ1bGxOYW1lIjoiQWRt ..... wiY2xpZW50SWQiOiIzTVZHOUEya04zQm4xN2h2Vn Uuc2FsZXNmb3JjZS5jb20ifQ==

Using the App Consumer Secret (red circle in the first pic) the Java Salesforce Framework SDK decodes this response and verify that it isn't tamped with.
The SDK can be found here, but it has been included in the CanvasApp-Base github under the "com.salesforce.canvas" package.

N.B. I've made some modification to the SignedRequest class (it appears that my own libraries have a new version and the org.apache.commons.codec.binary.Base64 class has different constructors than the one used in the SDK...so if you have problems just replace this class with the one provided by Salesforce).
The Consumer Secret is stored in the "application.conf" file, in the first lines:
     # Force.com User Secret
     canvas.consumer.secret = XXXXXXXX
This value is accessed through the AppProperties class.

This is the result:

The app uses sessions to store Canvas session info, so if you reload the page:

The application now has a valid Session Id that can be used, accordingly to the App Access Level, to work with Salesforce (from queries to metadata describes).

The core of this web app is the "Application.index()" method that stores the logic of the Signed Request handling:
package controllers;

import play.mvc.Controller;
import play.mvc.Result;
import views.html.index;

import com.salesforce.canvas.CanvasRequest;
import com.salesforce.canvas.SignedRequest;

public class Application extends Controller {

 public static Result index() {

  String message = "";
  CanvasRequest canvasInfo = AppProperties.getSessionCanvasRequest(Controller.session());
  if(canvasInfo != null)
  {
   message += "Hi <b>"+canvasInfo.getContext().getUserContext().getUserName()+"</b>! Canvas Session Info has already been given. Enjoy Canvas App!";
  }
  else
  {
   message += "Canvas App Session info not already set.";
   if(request().method()== "POST")
   {
    message += "Incoming POST request...";
    
    //this is the post info got from Force.com POST request
    String[] signedRequest = request().body().asFormUrlEncoded().get("signed_request");
    
    if(signedRequest!=null)
    {
     System.out.println("Request: "+signedRequest[0]);
     try
     {
      canvasInfo = SignedRequest.verifyAndDecode(signedRequest[0], AppProperties.CANVAS_CONSUMER_SECRET);
      AppProperties.setSessionCanvasRequest(canvasInfo,Controller.session());
      message += "Hi <b>"+canvasInfo.getContext().getUserContext().getUserName()+"</b>! Canvas Session Info has just been correctly given. Enjoy Canvas App!";
     }
     catch(Exception e)
     {
      e.printStackTrace();
      message += "Error occurred (see log): "+e.getLocalizedMessage();
     }
    }
    else
    {
     message += "No session info provided.";
    }
   }
  }
  return ok(index.render(message));
 }

}
And this is the "routes" file:
  GET      /                   controllers.Application.index()
  POST     /                   controllers.Application.index()
The "Application.index()" method serves both GET/POST requests.
Finally this is what happens if you access the page using a simple GET request outside Canvas:

That's all.

Tuesday, January 22, 2013

[APEX] Strange automatic casting error from String to ID

Developing some APEX for a customer, I saw this error:
System.StringException: Invalid id: -1

I checked the code and it was something like this:
     if(aString == anSObject.Id){
          ...
     }
So a String object cannot be compared to an ID type if the first is not an ID?
I switched the members:
     if(anSObject.Id == aString ){
          ...
     }
And no error is thrown.

In my experience it is a strange behavior, because I would have expected that the ID field whould have been casted to String (being the second operand) rather then the String object been casted to ID type...but maybe my whole life is a lie!!

Monday, January 21, 2013

[Java Play! / Heroku] Setup Java Play! + Heroku + Eclipse

I'm not a very good developer, I have to admit it.
I always forget, if I don't "play HTML" for a while, how to define a CSS style class, so you can imagine what kind of memory I have (the worst kind), and what kind of problems I have to set an environment to make a new project, if that implies that I have to follow more than 3 steps!.
This post is dedicated to myself of the next month, and I want to show me how to set up a Java Play! Proejct using Heroku and Eclipse, and some other little things.

First, create a new Play! project:
 $ play new my-new-app
              _            _
  _ __ | | __ _ _  _| |
 | '_ \| |/ _' | || |_|
 |  __/|_|\____|\__ (_)
 |_|            |__/

 play! 2.0.3, http://www.playframework.org

 The new application will be created in \playTest\my-new-app

 What is the application name?
 > my-new-app

 Which template do you want to use for this new application?

   1 - Create a simple Scala application
   2 - Create a simple Java application
   3 - Create an empty project

 > 2

 OK, application my-new-app is created.

 Have fun!

Now you have a simple Java Play! project (with a simple controller that says that your new application is ready.
The next step is to tell Heroku that your application is a Play application, by creating the /conf/dependencies.yml
 # Application dependencies

 require:
  - play 2.0.3

And that this application will be a web application (that needs the "play run" script) with the file Procfile ( in the root of the app, and without extension):
 web:    play run --http.port=$PORT $PLAY_OPTS

Now it's time to create a new GIT local repository (that will be pushed to Heroku):
   $ cd my-new-app
   $ git init
   $ git add .
   $ git commit -m "init"

Now it's time of Heroku.
You have to install the Heroku toolbelt (go here for instructions): if you have troubles with SSH keys follow this article).
Create a new Heroku application (it will be available on "http://my-new-app.herokuapp.com"):
   $ heroku create my-new-app

And push your local repository to git:
   $ git push heroku master
   

To open the app directly from the command line (via the browser)
       $ heroku open

If you don't like the name of your Heroku application, simply login to Heroku and change it in the preference panel.

Now install the Eclipse Heroku plugin (see details here).

If you need to set a specific GIT directory (the place where GIT, and Heroku, projects are stored in your local filesystem):
Import your Heroku project using the plugin just installed (Import... -> Heroku application): the project is not properly a Java project (packages are not highligthed with the usual icon, for example). To do this digit:
       $ play ecplipsify
Refresh the project on Eclipse and you see that now the project is correctly "divided" into packages.

To run the project locally, just use play run (http://localhost:9000)).

I haven't found a way to automatically compile the Play project in eclipse, so if I add a new Scala HTML template, I "eclipsify" one more time, to have a reference to the new view classes on Eclipse (the view.html.* classes created from the HTML files). This is also helpfull if you add new referenced libraries (I'll explain how to do this using GitHub in the next article).


Now that you are ready, it's the final countdown for your new killer app!

Thursday, January 17, 2013

[VisualForce] Block Auto Focus on DatePicker

This little post is born to remember how to avoid auto focus on Visualforce page of a DatePicker field, in case it is the first "focusable" field in the page:
 
     //avoid autofocus on date pickers
     function setFocusOnLoad() {}

This is something I have found online some weeks ago, but I can't remember the original post. So if you claim the paternity of this fix, I'll be glad to add a reference link.

Friday, January 11, 2013

[Salesforce / Visualforce] jQueryUI + Dialog + Postback

I wanna show you what happens if you do a postback inside a modal jQuery UI dialog. This is a problem I had some times ago making this challenge on Cloudspokes.

We have a simple controller:

 
public class MyController
{
 public String value{get;set;}
 
 public void anAction()
 {
  if(value != null && value.length()>0)
   ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR ,'Variable set to ['+value+']'));
  else
   ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR ,'Variable not set'));
 }

}

And this is the Visualforce page:

<apex:page controller="MyController" id="myPage">
 
 <apex:includeScript value="{!URLFOR($Resource.UIJQuery1822, 'js/jquery-1.7.2.min.js')}"/>
 <apex:includeScript value="{!URLFOR($Resource.UIJQuery1822, 'js/jquery-ui-1.8.22.custom.min.js')}"/>
    <apex:stylesheet value="{!URLFOR($Resource.UIJQuery1822, 'css/ui-lightness/jquery-ui-1.8.22.custom.css')}"/>
 
 <script language="javascript">

  //escapes Visualforce ID for jQuery
  function esc(myid) {
           return '#' + myid.replace(/(:|\.)/g,'\\\\$1');
        }
        
   j$ = jQuery.noConflict();
   
  //opens the dialog
  function openDialog(dialogId)
  {
   j$(esc(dialogId)).dialog({title:'Dialog window', modal:true});
  }
  
  //copies value from an input to another
  function copyHiddenFields(fromId, toId)
  {
   j$(esc(toId)).val(j$(esc(fromId)).val());
  }
  
 </script> 
 
 <apex:form id="myForm">
 
  <apex:pageMessages />


  <apex:outputPanel id="__dialog" style="display:none;">
   
   <apex:inputtext value="{!value}"/>
   <apex:commandButton value="Submit" action="{!anAction}"/>
   
  </apex:outputPanel>
  <apex:commandButton value="Open popup" onClick="openDialog('{!$Component.__dialog}'); return false;"/>
 </apex:form>
 
 
</apex:page>
This is the result:



If you try to post back nothing happens.
This is because the dialog is detached from the body and in some way the command button is detached from the javascript that makes the postback.
The trick is to use an <apex:actionFunction> component:

  <apex:actionFunction action="{!anAction}" name="doPostback"/>
  <apex:outputPanel id="__dialog2" style="display:none;">
   <apex:outputPanel >
    <apex:inputtext value="{!value}"/>
    <apex:commandButton onclick="doPostback(); return false;" value="Submit"/>
   </apex:outputPanel>
  </apex:outputPanel>
  <apex:commandButton value="Open popup 2" onClick="openDialog('{!$Component.__dialog2}'); return false;"/>


Now the postback works but there is still a problem: the "value" field is never set: the postback doesn't send any field in the dialog.
To accomplish this, you have to use an helper hidden field and some javascript to copy the dialog field into the hidden field (which is outside the dialog):

  <apex:actionFunction action="{!anAction}" name="doPostback"/>
  <apex:inputHidden value="{!value}" id="inputHidden"/>
  <apex:outputPanel id="__dialog3" style="display:none;">
   <apex:outputPanel >
    <apex:inputtext id="inputText" value="{!value}"/>
    <apex:commandButton 
     onclick="copyHiddenFields('{!$Component.inputText}','{!$Component.inputHidden}'); doPostback(); return false;" 
     value="Submit"/>
   </apex:outputPanel>
  </apex:outputPanel>
  <apex:commandButton value="Open popup 3" onClick="openDialog('{!$Component.__dialog3}'); return false;"/>


Append this simple JS function in the "script" tags:

//copies value from an input to another
  function copyHiddenFields(fromId, toId)
  {
   j$(esc(toId)).val(j$(esc(fromId)).val());
  }


Now the postback sends the correct value to the controller.


I leave you with a song for your soul.

Friday, January 4, 2013

[Salesforce / Apex] POST Mutipart/form-data with HttpRequest

17/10/2014: the solution has been improved. Datails at the end of the post.

Grandma says you cannot post a Mutipart/form-data using an HttpRequest in APEX?
Well, if she says this now you can tell her this is no more true!

All comes from a CloudSpokes challenge (here is the link)...at the time of starting the challenge I was absolutely sure I would have ended up the challenge in less than a day: http gets/posts  are not a big problem in APEX...well so it seemed.

To complete the challenge you had to make 4 REST calls (login, book a new upload, upload the file, set permissions): during testing the last step always failed.

This was the first time I jumped in front of this issue.

If you don't want to know what I did, go directly here.
The first thing I noted was that you cannot send a base64 encoded file to a server expecting a binary file...It wans't that obvious to me, because I've never struggled with file encoding.

The first code was something like this:
 
public static HTTPResponse uploadFile(Attachmnet file)
 {
  String boundary = '__boundary__xxx';
  String header = '--'+boundary+'\n';
     + 'Content-Disposition: form-data; name="data"; filename="'+file.name
     +'"\nContent-Type: application/octet-stream\n\n';

  String footer = '\n--'+boundary+'--';
  
  String body = EncodingUtil.base64Encode(file.Body); //encodes the blob into a base64 encoded String
  
  body = header + body + footer;
  
  HttpRequest req = new HttpRequest();
  req.setHeader('Content-Type','multipart/form-data; boundary='+boundary);
  req.setMethod('POST');
  req.setEndpoint('http://posttestserver.com/post.php?dir=what_a_wonderful_post');   //COOL site to test form uploads
  req.setBody(body);
  req.setTimeout(60000);
  req.setHeader('Content-Length',String.valueof(body.length()));
  
  Http http = new Http();
      return http.send(req);
 }

Then I was all "Eureka! An encoded string cannot be understood if the server needs a binary", so the only thing to do is to make a concatenation of header + file.Body.toString() + footer! This works only if the Blob comes from a text file (i.e. TXT, XML or CSV files): in these cases you don't have any problem...but with binary data all you have is the error:

Blob is not a valid UTF-8 string

I had to find another way.


Searching the web for "uploading binary data using apex" I found those bad links:
  • http://success.salesforce.com/ideaView?id=08730000000Kr80AAC
  • http://boards.developerforce.com/t5/Apex-Code-Development/Image-upload-using-multipart-form-data/td-p/243335
  • http://boards.developerforce.com/t5/Apex-Code-Development/sending-a-non-ascii-file-via-Http-POST/td-p/116662

That leaded to the block of comments you can see in the challenge's dashboard.

I didn't give up anyway. I had all data needed to send the request so I knew the solution was out there.

First thing was to understand if there was a way to merge Blobs types: it is not possible in APEX if you don't have the original data (in that case you use String concatenation or List of Integers concatenation, if you have bynary data in form of intergers list).
So I came up with the idea to merge header, body and footer using base64 encoded version, something like this:

String encoded = EncodingUtil.base64Encode(Blob.valueOf(header))+EncodingUtil.base64Encode(file.Body)+EncodingUtil.base64Encode(Blob.valueOf(footer));
 req.setBodyAsBlob(EncodingUtil.base64Decode(encoded));

I found that sometimes it worked (after a bit I understood that that times I was extremely lucky!!).

Debugging and searching the web (see this post for example) I came to know that a base64 encoded String could have padding characters because the base64 encoding is done using chunks of 3 bytes (see Google for details), and if data is not multiple of 3 bytes this padding in needed.

So I decided to remove the trailing "=" from each encoded chunck of the body request and paste them together. But it's not the proper way to play with encoded base64 strings, as removing trailing padding needs a reencoding of the original data.

The idea was to remove in some way, without messing with the encoded strings, all trailing padding "=".

For the header string it was simple, because it was simple text and I could have added some blank spaces to get an encoded string without "=". That's:

 
  String boundary = '__boundary__xxx';
  String header = '--'+boundary+'\n';
     + 'Content-Disposition: form-data; name="data"; filename="'+file.name
     +'"\nContent-Type: application/octet-stream';

  String headerEncoded = EncodingUtil.base64Encode(Blob.valueOf(header+'\n\n'));
  //this ensures no trailing "=" padding
  while(headerEncoded.endsWith('='))
  {
   header+=' ';
   headerEncoded = EncodingUtil.base64Encode(Blob.valueOf(header+'\n\n'));
  }

So in practice I add extra spaces before the "\n\n" ending characters till I have an encoded string without padding.

The Blob file is the main problem. I need the unencoded data to get the needed trailing, so I need a String value of the body: even if with that String how can I change the file to avoid the "=" ? As this data can be anything (form txt files to encoded zips), it is not so simple to add some padding character to avoid the "=" padding (not clear I know)...

If the encoded body doesn't contain any trailing "=", now the problem is over, the sum of the encoded header, body and footer works.

The problem is the last 4 bytes of the encoded body. That is from the 0th byte to the N-4th byte of the file I have no problem, becase it is an encoded version without "=" trailing.

How do I encode those last 4 bytes merging them with the footer?

I discovered that the HttpRequest class has a strange behavior: the setBodyAsBlob() and getBody() are complementary for the use I need. That is the following code doens't throw a "Blob is not a valid UTF-8 string" exception:

   Blob body = file.body;
   HttpRequest tmp = new HttpRequest();
   tmp.setBodyAsBlob(body);
   String bodyString = tmp.getBody();
   System.debug('## Output body:'+bodyString );

The result is a messing sequence of characters. Are they properly encoded? Yes they are, this is a kind of test:

Blob decoded4Bytes = EncodingUtil.base64Decode('AA==');
System.debug('FIRST ENCODING: '+EncodingUtil.base64Encode(decoded4Bytes));
HttpRequest tmp = new HttpRequest();
tmp.setBodyAsBlob(decoded4Bytes);
System.debug('LAST ENCODING: '+EncodingUtil.base64Encode(tmp.getBodyAsBlob()));

Using different kind of random encoded data (other that "AA==") the results of encoding, blobbing, httpRequesting (??!!), is always the same.
This is what i needed:

  1. decode the last 4 bytes in blob
  2. append it into an HttpRequest using the "setBodyAsBlob()"
  3. get the body as string with "getBody()"
  4. merge this string with the footer
  5. base64 encode the resulting string
  6. merge the base64 encoding of header, file body (from 0 to N-4th byte), previous merged string
  7. base64 unencoding the resulting string
  8. here you are the Blob you needed!
This is the resulting code:

public static HTTPResponse uploadFile(Attachmnet file)
{
  String boundary = '__boundary__xxx';
  String header = '--'+boundary+'\n';
  body += 'Content-Disposition: form-data; name="data"; filename="'+file.name
    +'"\nContent-Type: application/octet-stream';

  String footer = '\n--'+boundary+'--';
  
  // no trailing padding on header by adding ' ' before the last "\n\n" characters
  String headerEncoded = EncodingUtil.base64Encode(Blob.valueOf(header+'\n\n'));
  //this ensures no trailing "=" padding
  while(headerEncoded.endsWith('='))
  {
   header+=' ';
   headerEncoded = EncodingUtil.base64Encode(Blob.valueOf(header+'\n\n'));
  }
  //base64 encoded body
  String bodyEncoded = EncodingUtil.base64Encode(file.body);
  //base64 encoded footer
  String footerEncoded = EncodingUtil.base64Encode(Blob.valueOf(footer));
  
  Blob bodyBlob = null;
  //last encoded body bytes
  String last4Bytes = bodyEncoded.substring(bodyEncoded.length()-4,bodyEncoded.length());
  //if the last 4 bytes encoded base64 ends with the padding character (= or ==) then re-encode those bytes with the footer
  //to ensure the padding is added only at the end of the body
  if(last4Bytes.endsWith('='))
  {
   Blob decoded4Bytes = EncodingUtil.base64Decode(last4Bytes);
   HttpRequest tmp = new HttpRequest();
   tmp.setBodyAsBlob(decoded4Bytes);
   String last4BytesFooter = tmp.getBody()+footer;   
   bodyBlob = EncodingUtil.base64Decode(headerEncoded+bodyEncoded.substring(0,bodyEncoded.length()-4)+EncodingUtil.base64Encode(Blob.valueOf(last4BytesFooter)));
  }
  else
  {
   bodyBlob = EncodingUtil.base64Decode(headerEncoded+bodyEncoded+footerEncoded);
  }
  
  if(bodyBlob.size()>3000000)
  { 
   //this a "public class CustomException extends Exception{}"
   throw new CustomException('File size limit is 3 MBytes');
  }
  
  HttpRequest req = new HttpRequest();
  req.setHeader('Content-Type','multipart/form-data; boundary='+boundary);
  req.setMethod('POST');
  req.setEndpoint('http://posttestserver.com/post.php?dir=watchdox');  
  req.setBodyAsBlob(bodyBlob);
  req.setTimeout(60000);
  req.setHeader('Content-Length',String.valueof(req.getBodyAsBlob().size()));
  Http http = new Http();
  HTTPResponse res = http.send(req);
  return res;
}

I tested it with different kind of files, dimensions and it always worked. I'd like to know your thoughts.
See ya!

UPDATE

See this improvement to my solution. I'll add the content right here:
public static void uploadFile(Blob file_body, String file_name, String reqEndPoint){
      // Repost of code  with fix for file corruption issue
      // Orignal code postings and explanations
      // http://enreeco.blogspot.in/2013/01/salesforce-apex-post-mutipartform-data.html
      // http://salesforce.stackexchange.com/questions/24108/post-multipart-without-base64-encoding-the-body
      // Additional changes commented GW: that fix issue with occasional corruption of files
      String boundary = '----------------------------741e90d31eff';
      String header = '--'+boundary+'\nContent-Disposition: form-data; name="file"; filename="'+file_name+'";\nContent-Type: application/octet-stream';
      // GW: Do not prepend footer with \r\n, you'll see why in a moment
      // String footer = '\r\n--'+boundary+'--'; 
      String footer = '--'+boundary+'--';             
      String headerEncoded = EncodingUtil.base64Encode(Blob.valueOf(header+'\r\n\r\n'));
      while(headerEncoded.endsWith('='))
      {
       header+=' ';
       headerEncoded = EncodingUtil.base64Encode(Blob.valueOf(header+'\r\n\r\n'));
      }
      String bodyEncoded = EncodingUtil.base64Encode(file_body);
      // GW: Do not encode footer yet
      // String footerEncoded = EncodingUtil.base64Encode(Blob.valueOf(footer));

      Blob bodyBlob = null;
      String last4Bytes = bodyEncoded.substring(bodyEncoded.length()-4,bodyEncoded.length());

      // GW: Replacing this entire section
      /*
      if(last4Bytes.endsWith('='))
      {
           Blob decoded4Bytes = EncodingUtil.base64Decode(last4Bytes);
           HttpRequest tmp = new HttpRequest();
           tmp.setBodyAsBlob(decoded4Bytes);
           String last4BytesFooter = tmp.getBody()+footer;   
           bodyBlob = EncodingUtil.base64Decode(headerEncoded+bodyEncoded.substring(0,bodyEncoded.length()-4)+EncodingUtil.base64Encode(Blob.valueOf(last4BytesFooter)));
      }
      else
      {
            bodyBlob = EncodingUtil.base64Decode(headerEncoded+bodyEncoded+footerEncoded);
      }
      */
     // GW: replacement section to get rid of padding without corrupting data
     if(last4Bytes.endsWith('==')) {
        // The '==' sequence indicates that the last group contained only one 8 bit byte
        // 8 digit binary representation of CR is 00001101
        // 8 digit binary representation of LF is 00001010
        // Stitch them together and then from the right split them into 6 bit chunks
        // 0000110100001010 becomes 0000 110100 001010
        // Note the first 4 bits 0000 are identical to the padding used to encode the
        // second original 6 bit chunk, this is handy it means we can hard code the response in
        // The decimal values of 110100 001010 are 52 10
        // The base64 mapping values of 52 10 are 0 K
        // See http://en.wikipedia.org/wiki/Base64 for base64 mapping table
        // Therefore, we replace == with 0K
        // Note: if using \n\n instead of \r\n replace == with 'oK'
        last4Bytes = last4Bytes.substring(0,2) + '0K';
        bodyEncoded = bodyEncoded.substring(0,bodyEncoded.length()-4) + last4Bytes;
        // We have appended the \r\n to the Blob, so leave footer as it is.
        String footerEncoded = EncodingUtil.base64Encode(Blob.valueOf(footer));
        bodyBlob = EncodingUtil.base64Decode(headerEncoded+bodyEncoded+footerEncoded);
      } else if(last4Bytes.endsWith('=')) {
        // '=' indicates that encoded data already contained two out of 3x 8 bit bytes
        // We replace final 8 bit byte with a CR e.g. \r
        // 8 digit binary representation of CR is 00001101
        // Ignore the first 2 bits of 00 001101 they have already been used up as padding
        // for the existing data.
        // The Decimal value of 001101 is 13
        // The base64 value of 13 is N
        // Therefore, we replace = with N
        // Note: if using \n instead of \r replace = with 'K'
        last4Bytes = last4Bytes.substring(0,3) + 'N';
        bodyEncoded = bodyEncoded.substring(0,bodyEncoded.length()-4) + last4Bytes;
        // We have appended the CR e.g. \r, still need to prepend the line feed to the footer
        footer = '\n' + footer;
        String footerEncoded = EncodingUtil.base64Encode(Blob.valueOf(footer));
        bodyBlob = EncodingUtil.base64Decode(headerEncoded+bodyEncoded+footerEncoded);              
      } else {
        // Prepend the CR LF to the footer
        footer = '\r\n' + footer;
        String footerEncoded = EncodingUtil.base64Encode(Blob.valueOf(footer));
        bodyBlob = EncodingUtil.base64Decode(headerEncoded+bodyEncoded+footerEncoded);  
      }

      HttpRequest req = new HttpRequest();
      req.setHeader('Content-Type','multipart/form-data; boundary='+boundary);
      req.setMethod('POST');
      req.setEndpoint(reqEndPoint);
      req.setBodyAsBlob(bodyBlob);
      req.setTimeout(120000);

      Http http = new Http();
      HTTPResponse res = http.send(req);
}