I'm working on a Cordova application which is using ajax. My problem is that in debug, the app is working. But when I build a release, I got the error :

{"readyState":0,"status":0,"statusText":"NetworkError: Failed to execute 'send' on 'XMLHttpRequest': Failed to load ''."}

I don't understand from where is it ing. I added required lines to the res/xml/config.xml

<access origin="*" />
<access uri="*" subdomains="true" />
<feature name=".0/network"/>

And the permission INTERNET in the AndroidManifest. But the error is still happening...

And oh, here is my ajax call:

jQuery.support.cors = true;
        $.ajax(
            {
                accepts: {
                    xml: "text/xml; charset=ISO-8859-1",
                    text: "text/plain; charset=ISO-8859-1"
                }
                , converters: {
                "text xml": jQuery.parseXML
            }
                , type: "POST"
                //, contentType: "text/xml; charset=ISO-8859-1"
                , contentType : "application/x-www-form-urlencoded; charset=iso-8859-1"
                , url: address
                , async: false
                , cache: false
                , crossDomain: false
                , data: msg
                , dataType: "text"
                , global: false
                , ifModified: false
                , username: this.params.server.login
                , password: this.params.server.pass
                , timeout: 500000
                , beforeSend: function(jqXHR) {
                    jqXHR.overrideMimeType('text/xml;charset=iso-8859-1');

                    jqXHR.setRequestHeader("Access-Control-Allow-Origin", "*");
                    jqXHR.setRequestHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
                    jqXHR.setRequestHeader("Access-Control-Allow-Methods","POST, GET, OPTIONS, DELETE, PUT, HEAD");
                }
            }
        )

Hope you'll be able to help me find a solution.

I'm working on a Cordova application which is using ajax. My problem is that in debug, the app is working. But when I build a release, I got the error :

{"readyState":0,"status":0,"statusText":"NetworkError: Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'https://sub.domain.tld'."}

I don't understand from where is it ing. I added required lines to the res/xml/config.xml

<access origin="*" />
<access uri="*" subdomains="true" />
<feature name="http://api.phonegap./1.0/network"/>

And the permission INTERNET in the AndroidManifest. But the error is still happening...

And oh, here is my ajax call:

jQuery.support.cors = true;
        $.ajax(
            {
                accepts: {
                    xml: "text/xml; charset=ISO-8859-1",
                    text: "text/plain; charset=ISO-8859-1"
                }
                , converters: {
                "text xml": jQuery.parseXML
            }
                , type: "POST"
                //, contentType: "text/xml; charset=ISO-8859-1"
                , contentType : "application/x-www-form-urlencoded; charset=iso-8859-1"
                , url: address
                , async: false
                , cache: false
                , crossDomain: false
                , data: msg
                , dataType: "text"
                , global: false
                , ifModified: false
                , username: this.params.server.login
                , password: this.params.server.pass
                , timeout: 500000
                , beforeSend: function(jqXHR) {
                    jqXHR.overrideMimeType('text/xml;charset=iso-8859-1');

                    jqXHR.setRequestHeader("Access-Control-Allow-Origin", "*");
                    jqXHR.setRequestHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
                    jqXHR.setRequestHeader("Access-Control-Allow-Methods","POST, GET, OPTIONS, DELETE, PUT, HEAD");
                }
            }
        )

Hope you'll be able to help me find a solution.

• javascript
• ajax
• cordova

• jQuery.support.cors = true; - why are you overriding jQuery's cors detection? If a browser doesn't support cors, then telling jQuery it does won't help with anything. – Quentin Commented Feb 12, 2015 at 17:09
• 1 Access-Control-Allow-* are response headers, sent by the server. Sending these headers in your request may be what's ruining your request. I have limited experience with Cordova's cross-origin behavior, though, so I don't know for sure. – apsillers Commented Feb 12, 2015 at 17:10
• I added Jquery.support.cors and the 3 lasts setRequestHeader when I had my problem. It wasn't working before. – Kyu_ Commented Feb 13, 2015 at 11:57
• Does it work without the async option set to false? – Jack Vial Commented Sep 28, 2015 at 14:49

1 Answer 1

The jQuery documentation states:

Returning false in the beforeSend function will cancel the request

Since your beforeSend function doesn't have a return statement it will return undefined which is falsy. I assume that cancels your request (even though I didn't test it). Try returning true at the end of your beforeSend function.