Hi Folks,
I have a Django application with a scratch-built AJAX Javascript layer
that works well on Safari and Firefox, but not on IE. I am attempting
to rewrite it using MochiKit, but am having some issues with the doXHR
function, in that I seem to be getting back an empty XHR from my
Django Python script. I have a few questions:
1) Can anyone see what I'm doing wrong in the MochKit code? As I
said, I get back an empty XHR. Am I accessing the return XHR
incorrectly (should be the "result" argument in my callback, right?)
When I use typeof(result) I get the expected XHR type.
result.toJSONString() yields {}.
2) In the first code sample, I am able to access
ajaxRequest.response_text, which should be the same as
resulot.response_text in the MochiKit example, but the result appears
to be empty. Do I need to do something different to access the fields
of the doXHR result argument?
3) Am I getting back an empty result because doXHR sets some default
headers for the request that are incompatible with the Django return
type? What would be a good set of headers to use?
The generic code that works looks like:
selectEntity : function (entity)
{
try
{
var url = '/visionary/game/select/?xhr';
var eId = 'harp_game_id';
var getData = eId + '=' + escape(entity.pk);
var ajaxRequest = this.createRequest(); // Creates a
generic, platform appropriate XHR
ajaxRequest.open("POST", url, true);
ajaxRequest.onreadystatechange =
MochiKit.Base.bind(function ()
{
try
{
if(ajaxRequest.readyState == 4)
{
if(ajaxRequest.status == 200)
{
var response = eval( "(" +
ajaxRequest.responseText + ")");
if (response.success)
{
var consoleMessage =
response.initial_console_message;
MochiKit.Base.map(MochiKit.Base.bind(function (index) {
consoleMessage += "<br> " +
index + ": " + response[index];
var rowId = [this.app,
this.cn, response[index], 'row'].join('_');
this.setRowHighlight(MochiKit.DOM.getElement(rowId),
index ==
'newId' ? true : false);
}, this), ['newId', 'oldId']);
this.updateConsole(consoleMessage);
}
else
{
this.errorsToConsole(response);
}
return true;
}
}
}
catch(e)
{
MochiKit.Logging.logError('selectEntity
Callback fn ' + e);
}
return false;
}, this);
ajaxRequest.setRequestHeader("Content-Type", "application/
x-www-form-urlencoded");
ajaxRequest.send(getData);
return true;
}
catch(e)
{
MochiKit.Logging.logError('selectEntity(' + entity + ') '
+ e);
}
return false;
}
The MochiKit heavy code I can't get a response from looks like:
selectEntity : function (entity)
{
try
{
var url = '/visionary/game/select/?xhr';
var q = 'harp_game_id=' + entity.pk;
var r = {method: 'POST',
mimeType: 'application/javascript',
headers: [['Content-Type', 'application/x-www-
form-urlencoded'],
['Accept', 'application/
json']],
sendContent: q};
var d = MochiKit.Async.doXHR(url, r);
d.addCallback(MochiKit.Base.bind(function (result) {
try
{
MochiKit.Logging.log('Callback Request: ' +
result);
var response = eval( "(" +
result.response_text + ")");
if(typeof(response) != 'undefined')
{
var consoleMessage =
response.initial_console_message;
MochiKit.Base.map(MochiKit.Base.bind(function (index) {
consoleMessage += "<br> " + index +
": " + response[index];
var rowId = [this.app, this.cn,
response[index], 'row'].join('_');
this.setRowHighlight(MochiKit.DOM.getElement(rowId),
index ==
'newId' ? true : false);
}, this), ['newId', 'oldId']);
this.updateConsole(consoleMessage);
}
else
{
throw new Error('Failed to resolve XHR
Response. Result: ' + [typeof(result), result,
result.toJSONString()].join(', '));
}
}
catch(e)
{
MochiKit.Logging.logError('selectEntity
Callback fn ' + e);
}
}, this));
d.addErrback(MochiKit.Base.bind(function (result) {
MochiKit.Logging.log('Callback Request: ' +
result);
}, this));
}
catch(e)
{
MochiKit.Logging.logError('selectEntity(' + entity + ') '
+ e);
}
return false;
}
Thank you.
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