Hey all,

I am working on a multiple file uploader component and have hit a bit of a wall. My component will post each file to a visualfroce page. That visualforce page must in turn read the data that was posted (serialized as binary/base64) and create an attachment out of that. I just get a bit confused about the interplay between binary/base64/blob data. So if you know the answers to any of these questions, please let me know.

1) When data is in a regular "file" type form field, and that form is submitted, how is that file data encoded?
 

2) When creating an attachment object would the body be base64/binary/blob?

Currently I have a simple class that takes the data passed in the Files field and attempts to convert the content and attach it to the log object i makes.. It runs, but the attachment just displays the raw content of whatever it was passed (in this case I passed in the string (linebreaks removed of course)

TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlzIHNpbmd1b

GFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2YgdGhlIG1pbmQsIHRoYXQg

YnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGludWVkIGFuZCBpbmRlZmF0aWdhY

mxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRoZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55I

GNhcm5hbCBwbGVhc3VyZS4=

This is my method

    public void attachToObject()
    {
        
        Map<string,string> params = ApexPages.currentPage().getParameters();
        string fileData = params.get('Files');
        blob fileContent = blob.valueOf(fileData);      
        Data_Log__c log = new Data_Log__c();          
        log.trace__c = fileData;
        insert log;
        
        Attachment a = new Attachment(parentId = log.id, name='Data', body = fileContent);
        insert a;
        
        jsonString = '[{"delete_url":"NOT AVAILABLE","thumbnail_url":"The File","name":"'+log.id+'","delete_type":"DELETE","url":"theFile","size":'+fileContent.size()+'}]';
        
    }

Any help is appreciate. I feel like I have a loose understanding of what I need to do, but it's still a little foggy. If anyone could even just outline the steps I'd need to take to make this happen that would be awesome. 

TL;DR: How would I take data posted from a file form field and turn it into an attachment of the same type of file as the original?