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cache bing maps metadata - without this likely to exceed free quota for map tiles

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Jon Atkins 2013-11-23 00:05:31 +00:00
parent 85255f476b
commit cd6f17fad3
1 changed files with 14 additions and 0 deletions
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14
external/Bing.js vendored
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@ -38,8 +38,19 @@ L.BingLayer = L.TileLayer.extend({
}, },
loadMetadata: function() { loadMetadata: function() {
//MODIFIED: use browser sessionStorage, if available, to cache the metadata
var _this = this; var _this = this;
var cbid = '_bing_metadata_' + L.Util.stamp(this); var cbid = '_bing_metadata_' + L.Util.stamp(this);
var cachedMetadataKey = '_Leaflet_Bing_metadata_'+this.options.type;
try {
if (sessionStorage[cachedMetadataKey]) {
this.meta = JSON.parse(sessionStorage[cachedMetadataKey]);
this.initMetadata();
return;
}
} catch(e) {}
window[cbid] = function (meta) { window[cbid] = function (meta) {
_this.meta = meta; _this.meta = meta;
window[cbid] = undefined; window[cbid] = undefined;
@ -49,6 +60,9 @@ L.BingLayer = L.TileLayer.extend({
if (window.console) console.log("Leaflet Bing Plugin Error - Got metadata: " + meta.errorDetails); if (window.console) console.log("Leaflet Bing Plugin Error - Got metadata: " + meta.errorDetails);
return; return;
} }
try {
sessionStorage[cachedMetadataKey] = JSON.stringify(meta);
} catch(e) {}
_this.initMetadata(); _this.initMetadata();
}; };
var url = document.location.protocol + "//dev.virtualearth.net/REST/v1/Imagery/Metadata/" + this.options.type + "?include=ImageryProviders&jsonp=" + cbid + "&key=" + this._key; var url = document.location.protocol + "//dev.virtualearth.net/REST/v1/Imagery/Metadata/" + this.options.type + "?include=ImageryProviders&jsonp=" + cbid + "&key=" + this._key;