bd262fce41
Now the application no longer needs to care about the tile origin, because the CacheWrite control modifies the url if the CORS image loading is disabled and it is from a different origin. This only requires OpenLayers.ProxyHost to be properly configured. Also local storage keys use the original url instead of the proxied url, to make the CacheRead control work without proxy settings. No deferred exceptions are thrown any more. Instead, OpenLayers.Console is used to show an error message for security exceptions. We now check for OpenLayers.Tile.Image, because other tile types (e.g. UTFGrid) are not supported (yet). To make the same origin handling in the CacheWrite control easier, OpenLayers.Request now exposes the same origin logic from request.issue as a separate function, so it can also be used by other components.
38 lines
1.4 KiB
HTML
38 lines
1.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<title>OpenLayers Cache Write Example</title>
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<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
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<link rel="stylesheet" href="style.css" type="text/css">
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<script src="../lib/OpenLayers.js"></script>
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<script>OpenLayers.Console = window.console;</script>
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<script src="cache-write.js"></script>
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</head>
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<body onload="init()">
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<h1 id="title">Cache Write Example</h1>
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<div id="tags">
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local storage, persistence, cache, html5
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</div>
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<div id="shortdesc">Caching viewed tiles</div>
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<div id="map" class="smallmap"></div>
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<div>Cache status: <span id="status"></span></div>
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<div><button id="clear">Clear cache</button></div>
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<br>
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<div id="docs">
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<p>This example shows how to use the CacheWrite control to cache the
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tiles. Caching is turned on, and as you pan and zoom the map, every
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tile that is loaded is also copied to the browsers Local Storage.</p>
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<p>To use the cached tiles, switch to the
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<a href="cache-read.html">cache-read.html</a> example.</p>
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<p>See <a href="cache-write.js">cache-write.js</a> for the source
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code.</p>
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</div>
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</body>
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</html>
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