Created
September 10, 2021 11:37
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title>Secured layer access - Krishna Lodha</title> | |
<link rel="stylesheet" href="https://openlayers.org/en/v4.6.5/css/ol.css" type="text/css"> | |
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x --> | |
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script> | |
<script src="https://openlayers.org/en/v4.6.5/build/ol.js"></script> | |
</head> | |
<body> | |
<div id="map" class="map"></div> | |
<div id="info"> </div> | |
<script> | |
(function(open) { | |
XMLHttpRequest.prototype.open = function() { | |
var method = arguments[0].toLowerCase(); | |
var url = arguments[1]; | |
if(url == undefined) { | |
console.log(arguments) | |
} | |
if((method === 'get' || method ==='post') ) { | |
this.withCredentials = true; | |
open.apply(this, arguments); | |
this.setRequestHeader("Authorization", "Basic "+btoa(user+":"+pwd)); | |
} else { | |
open.apply(this, arguments); | |
} | |
}; | |
})(XMLHttpRequest.prototype.open); | |
var user = 'poi' #username of geoserver user | |
var pwd = 'geoserver' #pasword of geoserver user | |
function xhrTileLoadFunction(tile, src) { | |
var xhr = new XMLHttpRequest(); | |
xhr.responseType = "arraybuffer"; | |
xhr.onload = function() { | |
var arrayBufferView = new Uint8Array(this.response); | |
var blob = new Blob([arrayBufferView], { type: 'image/png' }); | |
var urlCreator = window.URL || window.webkitURL; | |
var imageUrl = urlCreator.createObjectURL(blob); | |
tile.getImage().src = imageUrl; | |
}; | |
xhr.open("GET", src); | |
xhr.send(); | |
} | |
var wmsSource = new ol.source.TileWMS({ | |
url: 'http://localhost:8080/geoserver/tiger/wms', | |
params: {'LAYERS': 'tiger:poi'}, | |
tileLoadFunction: xhrTileLoadFunction, | |
serverType: 'geoserver', | |
crossOrigin: 'use-credentials' | |
}); | |
var wmsLayer = new ol.layer.Tile({ | |
source: wmsSource | |
}); | |
var view = new ol.View({ | |
projection:'EPSG:4326', | |
center: [-74, 40], | |
zoom: 5 | |
}); | |
var map = new ol.Map({ | |
layers: [new ol.layer.Tile({ | |
source: new ol.source.OSM() | |
}), | |
wmsLayer], | |
target: 'map', | |
view: view | |
}); | |
</script> | |
</body> | |
</html> |
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