"Brandon" <Brandon@d...> wrote in message 
news:4FF749E8-874D-43AA-8143-456AFB5804D5@m......
> My browser app sends a request to the server for a binary file.  The 
> server
> receives the request, converts the file to base64, packages it up in XML, 
> and
> returns it to the client/browser.
>
> I can parse the returned XML just fine -- and find the base64 data -- but
> for the life of me cannot get it decoded back to it's original format. 
> The
> script below gets the filedata (using "nodeTypedValue") and saves it, but
> it's still the base64 representation of the file.
>
> I've tried a million different things, and have searched all over the web
> and newsgroups, and I just can't seem to find a combination that gets me 
> the
> original unencoded/decoded filedata.
>
> Two other notes:
> 1. On the server side, I set the dataType = "bin.base64"
> 2. When it's back here on the client, if I alert() out the dataType for 
> the
> node, it's null.  I thought that was interesting.
>
> Here is my client/browser JavaScript:
> var getdocs_xmlhttp = new ActiveXObject("Msxml2.XMLHTTP.4.0");
> var getdocs_xmldoc  = new ActiveXObject("Msxml2.DOMDocument.4.0");
> getdocs_xmldoc.loadXML(reqxml);
> getdocs_xmlhttp.open("POST", "http://myserver/getbinfile.asp", false);
> getdocs_xmlhttp.send(getdocs_xmldoc);
>
>  getdocs_xmldoc.loadXML(getdocs_xmlhttp.responseText);
>  //getdocs_xmldoc.save(folderpath + "download.xml");
>  var root           = getdocs_xmldoc.documentElement;
>  var inodelist      = root.childNodes;
>
> ...
> parsing through for other data as well (i.e. filename)
> ...
>   if( nitem.nodeName == "filedata" )
>   {
>     var objStream = new ActiveXObject("ADODB.Stream")
>     objStream.Type = 1;
>     objStream.Open();
>     objStream.Write( nitem.childNodes.item(0).nodeTypedValue );
>     objStream.SaveToFile( folderpath + tfilename, (1 & 2) );
>     objStream.Close();
>   }
>
> ANY help would be MUCH appreciated.  Thank you all!
>
> -b
>
>
Not sure how you're creating the node which holds the binary data but it 
should have dt:dt="bin.base64" as an attribute.

Here are two scripts, the first saves a Word doc within a base64 node, the 
second recovers it:

//BinaryToXml.js
var WORD_PATH = "C:\\Scripts\\JS\\BinaryXml\\hello1.doc";
var XML_PATH = "C:\\Scripts\\JS\\BinaryXml\\word.xml"

function main()
{
  var oDoc = new ActiveXObject("MSXML2.DOMDocument.4.0");
  oDoc.async = false;
  var oStream = new ActiveXObject("ADODB.Stream");
  oStream.type = 1; //Binary
  oStream.open();
  oStream.loadFromFile(WORD_PATH);
  var oNode = oDoc.createProcessingInstruction("xml", "version='1.0' 
encoding='utf-8'")
  oDoc.insertBefore(oNode, oDoc.childNodes[0]);
  var oRoot = oDoc.createElement("Root")
  oDoc.documentElement = oRoot;
  //Following line is not strictly necessary
  oRoot.setAttribute("xmlns:dt", "urn:schemas-microsoft-com:datatypes");
  oNode = oRoot.appendChild(oDoc.createElement("wordDoc"));
  oNode.dataType = "bin.base64";
  oNode.nodeTypedValue = oStream.read();
  oStream.close();
  oDoc.save(XML_PATH);
  WScript.echo(oDoc.url);
}

main();


************************

//XmlToBinary.js
var WORD_PATH = "hello2.doc";
var XML_PATH = "word.xml"

function main()
{
  var oDoc = new ActiveXObject("MSXML2.DOMDocument.4.0");
  oDoc.async = false;
  oDoc.load(XML_PATH);
  var oStream = new ActiveXObject("ADODB.Stream");
  oStream.type = 1; //Binary
  oStream.open();
  oStream.write(oDoc.documentElement.selectSingleNode("wordDoc").nodeTypedValue);
  oStream.savetoFile(WORD_PATH);
  oStream.close();
}

main();



-- 

Joe Fawcett -  XML MVP

https://mvp.support.microsoft.com/profile=8AA9D5F5-E1C2-44C7-BCE8-8741D22D17A5