WebGIS-openlayers-geoserver-/GetFeatureInfoWMS.html at master · Hyperionlucky/WebGIS-openlayers-geoserver- · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <meta charset="utf-8">
    <link rel="stylesheet" href="ol/ol.css" type="text/css">
    <style>
        #map {
            width: 100%;
            height: 400px;
        }
    </style>
    <title>OpenLayers example</title>
    <script src="ol/ol.js" type="text/javascript"></script>
</head>

<body>
    <div id="map" class="map"></div>
    <div id="info">No information</div>
    <script type="text/javascript">
        var wmsSource = new ol.source.ImageWMS({
            url: 'http://39.97.184.163/geoserver/WebGIS/wms',
            params: {
                'LAYERS': 'WebGIS:province_boundary,WebGIS:china_boundary,WebGIS:river,WebGIS:road,WebGIS:railway,WebGIS:capital'
            },
            serverType: 'geoserver',
            crossOrigin: 'anonymous'
        });

        var wmsLayer = new ol.layer.Image({
            source: wmsSource
        });

        var view = new ol.View({
            projection:'EPSG:4326',
            center: [104, 28],
            zoom: 3
        });

        var map = new ol.Map({
            controls: ol.control.defaults().extend([
                new ol.control.ScaleLine({
                    units: 'degrees'
                })
            ]),
            layers: [wmsLayer],
            target: 'map',
            view: view
        });

        map.on('singleclick', function (evt) {
            document.getElementById('info').innerHTML = '';
            var viewResolution = /** @type {number} */ (view.getResolution());
            var url = wmsSource.getFeatureInfoUrl(
                evt.coordinate, viewResolution, 'EPSG:4326', {
                    'INFO_FORMAT': 'text/html'
                });
            if (url) {
                fetch(url)
                    .then(function (response) {
                        return response.text();
                    })
                    .then(function (html) {
                        document.getElementById('info').innerHTML = html;
                    });
            }
        });

        map.on('pointermove', function (evt) {
            if (evt.dragging) {
                return;
            }
            var pixel = map.getEventPixel(evt.originalEvent);
            var hit = map.forEachLayerAtPixel(pixel, function () {
                return true;
            });
            map.getTargetElement().style.cursor = hit ? 'pointer' : '';
        });
    </script>
</body>

</html>