URL call from a dashboard button

General
1

I made the below flow some time ago to download a file from my Node-Red server. I just pass the full file path like this: http://192.168.x.x:1880/download?filename=/home/pi/something.csv
Up until now I formatted a 'href' link in a ui-tempate in 'target="blank"' so it downloads in a new window and does not change my dashboard window.

[
    {
        "id": "aa8c482.93734b8",
        "type": "http in",
        "z": "74f191ff.db063",
        "name": "",
        "url": "/download",
        "method": "get",
        "upload": false,
        "swaggerDoc": "",
        "x": 140,
        "y": 3440,
        "wires": [
            [
                "d969ba04.e24028"
            ]
        ]
    },
    {
        "id": "d19cc7d8.646328",
        "type": "http response",
        "z": "74f191ff.db063",
        "name": "",
        "statusCode": "",
        "headers": {},
        "x": 930,
        "y": 3440,
        "wires": []
    },
    {
        "id": "d969ba04.e24028",
        "type": "function",
        "z": "74f191ff.db063",
        "name": "Get the file name",
        "func": "msg.filename = msg.req.query.filename;\nmsg.contentdisposition = \"attachment; filename=\\\"\" + msg.req.query.filename.replace(/^.*(\\\\|\\/|\\:)/, '') + \"\\\"\";\nreturn msg;\n",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 390,
        "y": 3440,
        "wires": [
            [
                "e92381c3.c4cd2"
            ]
        ],
        "outputLabels": [
            "Folder selected"
        ]
    },
    {
        "id": "e92381c3.c4cd2",
        "type": "file in",
        "z": "74f191ff.db063",
        "name": "",
        "filename": "filename",
        "filenameType": "msg",
        "format": "",
        "chunk": false,
        "sendError": false,
        "encoding": "none",
        "x": 580,
        "y": 3440,
        "wires": [
            [
                "99ff4953.d0d5c8"
            ]
        ]
    },
    {
        "id": "99ff4953.d0d5c8",
        "type": "change",
        "z": "74f191ff.db063",
        "name": "Set Headers",
        "rules": [
            {
                "t": "set",
                "p": "headers",
                "pt": "msg",
                "to": "{}",
                "tot": "json"
            },
            {
                "t": "set",
                "p": "headers.content-type",
                "pt": "msg",
                "to": "text/csv",
                "tot": "str"
            },
            {
                "t": "set",
                "p": "headers.Content-Disposition",
                "pt": "msg",
                "to": "contentdisposition",
                "tot": "msg"
            }
        ],
        "action": "",
        "property": "",
        "from": "",
        "to": "",
        "reg": false,
        "x": 750,
        "y": 3440,
        "wires": [
            [
                "d19cc7d8.646328"
            ]
        ]
    }
]

This is all good and well, but I would like to do the same using a dashboard button.
But I have no idea how to do it. I was trying to create a button in ui-tempate and for it to call a redirect function, but I could not make it work. Does anyone have a working example?

2

If I understand correctly this should work

[{"id":"985a1d1ce6113f18","type":"ui_button","z":"da8a6ef0b3c9a5c8","name":"","group":"2d4fe667.28f8ba","order":17,"width":0,"height":0,"passthru":false,"label":"button","tooltip":"","color":"","bgcolor":"","className":"","icon":"","payload":"<script>window.location.href = \"https://www.sample-videos.com/csv/Sample-Spreadsheet-10-rows.csv\";</script>","payloadType":"str","topic":"topic","topicType":"msg","x":350,"y":520,"wires":[["04d9330d2a4e87cf"]]},{"id":"04d9330d2a4e87cf","type":"change","z":"da8a6ef0b3c9a5c8","name":"","rules":[{"t":"move","p":"payload","pt":"msg","to":"template","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":510,"y":540,"wires":[["f27d36356901af0b"]]},{"id":"f27d36356901af0b","type":"ui_template","z":"da8a6ef0b3c9a5c8","group":"2d4fe667.28f8ba","name":"","order":18,"width":0,"height":0,"format":"","storeOutMessages":false,"fwdInMessages":false,"resendOnRefresh":false,"templateScope":"local","className":"","x":700,"y":540,"wires":[[]]},{"id":"2d4fe667.28f8ba","type":"ui_group","name":"demo","tab":"1caa8458.b17814","order":2,"disp":true,"width":"12","collapse":false},{"id":"1caa8458.b17814","type":"ui_tab","name":"Demo","icon":"dashboard","order":1,"disabled":false,"hidden":false}]

Click the button and Dashboard should be redirected to download.

3

Thanks a lot, it has worked with a small modification:
<script>window.open('your_url', '_blank');</script>

The window.location.href worked as well, but after executing it, the dashboard stopped responding. With tine window.open there is a quick flicker as the browser opens a new windows and also closes it as soon as the download begins. But seems to be working and no impact on the dashboard.