Interacting with Geoserver through ExtJs using an Ajax request

I am currently facing an issue with my ExtJS app where I am trying to send a request to a geoserver server. Although the URL displays correctly when accessed via the browser, I encounter an error when making the request within my app. The error message in the browser states: "XMLHttpRequest cannot load http://.../geoserver/.../wms?VERSION=1.1.0&SERVICE…3C/coordinates%3E%3C/Envelope%3E%3C/BBOX%3E%3C/Filter%3E&_dc=1435334851353. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access." I believe this is related to a CQL filter being used for the BBOX operation in the request. Can someone provide guidance on how to resolve this issue?

Below is the code snippet causing the issue:

dragBox.on('boxend', function(e) {
        if (capaActiva != null) {
            // Code logic here
        }
javascriptajaxextjs

Answer №1

The root of your problem lies in a CORS issue that you are experiencing.

If you have the capability to access the geoserver and make adjustments to its response headers, consider incorporating the following header:

Access-Control-Allow-Origin: *

In addition to this, ensure that you include the following configuration in your AJAX request:

headers: {
    'Access-Control-Allow-Origin': '*'
}

For more detailed information, refer to this discussion thread.

If you lack access to the geoserver, explore whether they support the use of JSONP. In such cases, opt for leveraging Ext.data.JsonP as an alternative to Ext.Ajax.

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