Check if file exist in SharePoint Document library using JSON

Check if file exist in SharePoint Document library using JSON

<script type="text/javascript" src="//ajax.aspnetcdn.com/ajax/4.0/1/MicrosoftAjax.js"> </script>

<script type="text/javascript" src="/_layouts/15/sp.runtime.js"> </script>

<script type="text/javascript" src="/_layouts/15/sp.js"> </script>

<script type="text/javascript">

       

        var retunValue = true;

        //var url = "http://ravimaloth:9870/Aaaaj/Test1/sample.doc";

        var listTitle = 'Aaaaj';

        var fileUrl = 'http://ravimaloth:9870/Aaaaj/Test1/sample.doc';

        var ctx = SP.ClientContext.get_current();

        var list = ctx.get_web().get_lists().getByTitle(listTitle);

        var qry = new SP.CamlQuery();

        qry.set_viewXml('<View Scope="RecursiveAll"><Query><Where><Eq><FieldRef Name="FileRef"/><Value Type="Url">' + fileUrl + '</Value></Eq></Where></Query></View>');

        var items = list.getItems(qry);

        ctx.load(items);

        ctx.executeQueryAsync(function () {

          

            var fileFound = (items.get_count() > 0);

            debugger;

            if (fileFound) {

                if (!window.confirm('File already exist, Are you sure you want to replace?'))                 {

                     retunValue = false;

                }              

            }          

        },

        function(sender, args) {

            console.log(args.get_message());

        });

</script>