在Web Worker中使用“Google Maps API”
在Web Worker中使用“Google Maps API”
提问于 2015-06-14 18:47:24
我试图在Javascript Web Worker中加载Google Maps API，但它无法加载地图库。Web Worker代码如下所示：
importScripts('http://maps.googleapis.com/maps/api/js?libraries=geometry&key=MYAPIKEY&sensor=FALSE'); 这将失败，并显示简单的
Script Error.在Chrome中，当我试图加载Worker时。
我假设maps库中的某个对象试图访问DOM。但这只是一种猜测。有谁有解决方案吗？
编辑：我打开了上面的链接，并尝试extract+modify它的内容。所以WebWorker.js现在看起来是这样的：
var window = {google: {}};
var google = {maps: {}};
(function() {
function getScript(src) {
importScripts(src);
//document.write('<' + 'script src="' + src + '"><' + '/script>');
}
var modules = google.maps.modules = {};
google.maps.__gjsload__ = function(name, text) {
modules[name] = text;
};
google.maps.Load = function(apiLoad) {
delete google.maps.Load;
apiLoad([0.009999999776482582,[[["http://mt0.googleapis.com/vt?lyrs=m@306000000\u0026src=api\u0026hl=de-DE\u0026","http://mt1.googleapis.com/vt?lyrs=m@306000000\u0026src=api\u0026hl=de-DE\u0026"],null,null,null,null,"m@306000000",["https://mts0.google.com/vt?lyrs=m@306000000\u0026src=api\u0026hl=de-DE\u0026","https://mts1.google.com/vt?lyrs=m@306000000\u0026src=api\u0026hl=de-DE\u0026"]],[["http://khm0.googleapis.com/kh?v=174\u0026hl=de-DE\u0026","http://khm1.googleapis.com/kh?v=174\u0026hl=de-DE\u0026"],null,null,null,1,"174",["https://khms0.google.com/kh?v=174\u0026hl=de-DE\u0026","https://khms1.google.com/kh?v=174\u0026hl=de-DE\u0026"]],[["http://mt0.googleapis.com/vt?lyrs=h@306000000\u0026src=api\u0026hl=de-DE\u0026","http://mt1.googleapis.com/vt?lyrs=h@306000000\u0026src=api\u0026hl=de-DE\u0026"],null,null,null,null,"h@306000000",["https://mts0.google.com/vt?lyrs=h@306000000\u0026src=api\u0026hl=de-DE\u0026","https://mts1.google.com/vt?lyrs=h@306000000\u0026src=api\u0026hl=de-DE\u0026"]],[["http://mt0.googleapis.com/vt?lyrs=t@132,r@306000000\u0026src=api\u0026hl=de-DE\u0026","http://mt1.googleapis.com/vt?lyrs=t@132,r@306000000\u0026src=api\u0026hl=de-DE\u0026"],null,null,null,null,"t@132,r@306000000",["https://mts0.google.com/vt?lyrs=t@132,r@306000000\u0026src=api\u0026hl=de-DE\u0026","https://mts1.google.com/vt?lyrs=t@132,r@306000000\u0026src=api\u0026hl=de-DE\u0026"]],null,null,[["http://cbk0.googleapis.com/cbk?","http://cbk1.googleapis.com/cbk?"]],[["http://khm0.googleapis.com/kh?v=86\u0026hl=de-DE\u0026","http://khm1.googleapis.com/kh?v=86\u0026hl=de-DE\u0026"],null,null,null,null,"86",["https://khms0.google.com/kh?v=86\u0026hl=de-DE\u0026","https://khms1.google.com/kh?v=86\u0026hl=de-DE\u0026"]],[["http://mt0.googleapis.com/mapslt?hl=de-DE\u0026","http://mt1.googleapis.com/mapslt?hl=de-DE\u0026"]],[["http://mt0.googleapis.com/mapslt/ft?hl=de-DE\u0026","http://mt1.googleapis.com/mapslt/ft?hl=de-DE\u0026"]],[["http://mt0.googleapis.com/vt?hl=de-DE\u0026","http://mt1.googleapis.com/vt?hl=de-DE\u0026"]],[["http://mt0.googleapis.com/mapslt/loom?hl=de-DE\u0026","http://mt1.googleapis.com/mapslt/loom?hl=de-DE\u0026"]],[["https://mts0.googleapis.com/mapslt?hl=de-DE\u0026","https://mts1.googleapis.com/mapslt?hl=de-DE\u0026"]],[["https://mts0.googleapis.com/mapslt/ft?hl=de-DE\u0026","https://mts1.googleapis.com/mapslt/ft?hl=de-DE\u0026"]],[["https://mts0.googleapis.com/mapslt/loom?hl=de-DE\u0026","https://mts1.googleapis.com/mapslt/loom?hl=de-DE\u0026"]]],["de-DE","US",null,0,null,null,"http://maps.gstatic.com/mapfiles/","http://csi.gstatic.com","https://maps.googleapis.com","http://maps.googleapis.com",null,"https://maps.google.com","https://gg.google.com","http://maps.gstatic.com/maps-api-v3/api/images/","https://www.google.com/maps",0],["http://maps.gstatic.com/maps-api-v3/api/js/21/3/intl/de_ALL","3.21.3"],[141790386],1,null,null,null,null,null,"",["geometry"],null,0,"http://khm.googleapis.com/mz?v=174\u0026","AIzaSyDQi59vEjsIzBM-AFMeDbszVsOckQOb5A8","https://earthbuilder.googleapis.com","https://earthbuilder.googleapis.com",null,"http://mt.googleapis.com/vt/icon",[["http://mt0.googleapis.com/vt","http://mt1.googleapis.com/vt"],["https://mts0.googleapis.com/vt","https://mts1.googleapis.com/vt"],null,null,null,null,null,null,null,null,null,null,["https://mts0.google.com/vt","https://mts1.google.com/vt"],"/maps/vt",306000000,132],2,500,[null,"http://g0.gstatic.com/landmark/tour","http://g0.gstatic.com/landmark/config",null,"http://www.google.com/maps/preview/log204","","http://static.panoramio.com.storage.googleapis.com/photos/",["http://geo0.ggpht.com/cbk","http://geo1.ggpht.com/cbk","http://geo2.ggpht.com/cbk","http://geo3.ggpht.com/cbk"]],["https://www.google.com/maps/api/js/master?pb=!1m2!1u21!2s3!2sde-DE!3sUS!4s21/3/intl/de_ALL","https://www.google.com/maps/api/js/widget?pb=!1m2!1u21!2s3!2sde-DE"],null,0,0,"/maps/api/js/ApplicationService.GetEntityDetails",0], loadScriptTime);
};
importScripts(
'http://maps.gstatic.com/maps-api-v3/api/js/21/3/intl/de_ALL/main.js'
, 'http://maps.gstatic.com/maps-api-v3/api/js/21/3/intl/de_ALL/geometry.js'
);
})();但这仍然会导致“脚本错误”。
回答 2
Stack Overflow用户
回答已采纳
发布于 2015-07-07 11:02:08
Google客户端api，如map，drive等需要dom元素，所以你不能在web worker中使用map api。我在过去也有过类似的问题，经过几个小时的研究，我确认它不能做到，至少现在不能。下面是关于web wroker你需要知道的一些事情。
我们可以在web workers中访问的对象很少：
XMLHttpRequest，JSON，Worker，navigator，location，设置和清除超时，导入脚本，设置和清除间隔。
无法从localStorage worker访问窗口或父Web对象。
有关更多详细信息，请查看this链接。
Stack Overflow用户
发布于 2016-06-11 19:54:05
实际上，我已经能够创建一个标记的实例，方法是让worker误以为有一个DOM对象可供它使用。我从试图在workers中使用jQuery命令的人那里窃取了这个想法，他们遇到了同样的问题。我的推荐人来自这里：
// create a fake document for jQuery to function - DOES NOT PROVIDE ACCESS TO ACTUAL DOM ELEMENTS
// from Tomáš Zato comment on http://stackoverflow.com/questions/10491448/how-to-access-jquery-in-html-5-web-worker
var document = self.document = {parentNode: null, nodeType: 9, toString:function() {return "FakeDocument"}};
var window = self.window = self;
var fakeElement = Object.create(document);
fakeElement.nodeType = 1;
fakeElement.toString=function() {return "FakeElement"};
fakeElement.parentNode = fakeElement.firstChild = fakeElement.lastChild = fakeElement;
fakeElement.ownerDocument = document;
document.head = document.body = fakeElement;
document.ownerDocument = document.documentElement = document;
document.getElementById = document.createElement = function() {return fakeElement;};
document.createDocumentFragment = function() {return this;};
document.getElementsByTagName = document.getElementsByClassName = function() {return [fakeElement];};
document.getAttribute = document.setAttribute = document.removeChild =
document.addEventListener = document.removeEventListener =
function() {return null;};
document.cloneNode = document.appendChild = function() {return this;};
document.appendChild = function(child) {return child;};页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/30828451
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