Main problem I see there is that you are not waiting for the applet to initialize. You need to do that call from within an appletReadyCallback function.

On Tue, Aug 28, 2012 at 3:04 AM, Mikko Rantalainen <mikko.rantalainen@peda.net> wrote:
2012-08-24 17:07 Europe/Helsinki: Robert Hanson:
> On Fri, Aug 24, 2012 at 3:26 AM, Mikko Rantalainen
> <mikko.rantalainen@peda.net> wrote:
>> Is it possible to configure JmolApplet to fetch the required files
>> through the UA (web browser) instead of directly trying to connect the
>> server?
>
> I believe so. If you can get it through AJAX, you are all set. Just
> use Jmol-JSO.
> You should create a new _Applet prototype function on your page:
>
>   Jmol._Applet.prototype._getSecureFile = function(query, script){
>   this._script("zap;set echo middle center;echo Retrieving data...");
>   // script is necessary only if you need to do the post-load processing
>   var self = this;
>   Jmol._contactServer("?query=" + encodeURIComponent(query),
>    function(data){self._loadModel(data, ";" + script)},
> function(){alert("error...")}
>   );
>  }
>
> and call that from your page link.

I didn't follow what you mean with "page link".

> Then be sure to set  Info.serverURL to your server, not mine!

Sure. In fact, I used _ajax() directly and never even use serverURL. See
below.

> Info.serverURL needs to point to a PHP document on your server to
> process your request for the "query" -- just deliver the file contents
> as is. In this way, the actual data files need never be exposed. Only
> your PHP file needs exposure.

I wonder what I did wrong. Here's the code I'm trying to use:


<script>
// We'll need to call Jmol._ajax() but it's an internal
// method. We workaround the issue by adding a new
// public method to Jmol object that calls the internal
// method for us.
Jmol._Applet.prototype._loadModelIndirect = function(url, script)
 {
  this._script("zap;\
   set echo middle center;\
   echo Loading model via user agent...");

  var self = this;
  var info =
  {
   dataType: "text",
   type: "GET",
   url: url,
   success: function(a)
   {
    Jmol._loadSuccess(a, function(data){
     self._loadModel(data, ";"+script);
    })
   },
   error: function()
   {
    Jmol._loadError(function(e){
     alert("error: "+e)
    })
   },
   async:Jmol._asynchronous
  }
  Jmol._ajax(info);
 };

var Info = {
 color: "#FFFFFF", // background color
 width: "100%",
 height: "100%",
 script: "language=\u0022fi\u0022;",
 use: "Java WebGL",
 jarPath: "/path/to/jmol/13.0.1",
 jarFile: "JmolApplet.jar",
 isSigned: false,
 //debug: true,
 };

myJmol = Jmol.getApplet("JmolView", Info);
myJmol._loadModelIndirect("http://path/to/molecule.jmol", "");
</script>


The URL in _loadModelIndirect() will return the actual data only if
correct "session-id" is passed as a cookie.

I see that the browser is correctly downloading the molecule
and Jmol._loadModel() will be called with first parameter set
to the contents of the file and second parameter is set to
an empty string.

I can then trace the execution to Jmol._Applet.prototype._loadModel() in
 JmolApplet.js (from Jmol version 13.0.1) using Firefox 14 and
Firebug. The browser then executes

***
Jmol._Applet.prototype._loadModel = function(mol, params) {
var script = 'load DATA "model"\n' + mol + '\nEND "model" '
+ params;
this._applet.script(script);
}
***

Here the call 'this._applet.script()' will be passed a very long
 string (around 170 KB):

    'load DATA "model"\nMODEL_FILE_CONTENTS\nEND "model" ;'

where MODEL_FILE_CONTENTS is the actual file contents from correct .jmol
file (techically a ZIP archive).

Then nothing happens. The red message "Loading model via user
agent..." stays in the middle of the applet with zero CPU usage.

Do I need to do something else after calling Jmol._loadModel() inside
the ajax callback to get the model visible?

--
Mikko


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--
Robert M. Hanson
Larson-Anderson Professor of Chemistry
Chair, Chemistry Department
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr


If nature does not answer first what we want,
it is better to take what answer we get.

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900