Titanium Community Questions & Answer Archive

Question

Can't get XHR to work

I'm trying to download an XML file on a remote server and save it locally as an XML file for my application to use offline. However, the 'xhr.onload' function always fails, but when it shows the 'Application Error' alert dialog, the actual error is blank, so I have no idea what's wrong. Here is the code I'm using:

    if (Titanium.Network.networkType != Titanium.Network.NETWORK_NONE){ // Network is available, download latest database
        var xhr = Ti.Network.createHTTPClient();
        xhr.open("POST","http://www.5byfive.net/vehicles.xml");
        xhr.onerror = function(e) {
            Ti.UI.createAlertDialog({title:'Network Error', message:e.error}).show();
            Ti.API.info('IN ERROR ' + e.error);
        };
        xhr.setTimeout(30000);
        xhr.onload = function() {
            try {
                var f = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory,'vehicledata.xml');
                var doc = this.responseXML.documentElement;
                if (doc.getElementsByTagName("success").item(0).text == 1) {
                    f.write(this.responseData);  
                } else {
                    Ti.UI.createAlertDialog({title:'Service Error', message:'Service is not available at the moment, please try again later'}).show();
                };
            }
                catch(E){Ti.UI.createAlertDialog({title:'Application Error', message:E.error}).show();
            };
        };
        xhr.send();
    };

I guess it's either a problem with getting the file from the remote server, or writing it to a local file?

Accepted Answer

Accepted Answer

Looking at the xml file, i don't see you a node name success, why request it?

Try remove that line and the subsequent else line, just do

try {
var f = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory,'vehicledata.xml');
f.write(this.responseData);
Ti.API.info(this.responseText); // check the file content on TI info panel.
}
catch......

ON OSX, You can check the physical downloaded file on user/library/application support/iphone simulator/{titanium SDK version}/application/{app long string of unique id}/Documents/yourfile.xml

Answer 2

Well, the XML at that URL pulls up just fine, so that's not an issue

one thing that stands out right away after looking at the XML:

You are looking for a tag by the name of "success"… but the XML file contains no such name

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Can't get XHR to work

2 Answers

Accepted Answer