Javascript 如何对 Google Maps API 进行跨域 AJAX 调用？
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How to make cross-domain AJAX calls to Google Maps API?
提问by Pierre Duplouy
I'm trying to make a jQuery $.getJSONcall to the Google Maps Geocoding webservice, but this doesn't work because of cross-domain security issues.
我正在尝试对Google Maps Geocoding webservice进行 jQuery$.getJSON调用，但由于跨域安全问题，这不起作用。
I haven't been able to figure it out online, but I've read a bit about Google Javascript API or JSONP, but so far no clear answer...
我一直无法在网上弄明白，但我已经阅读了一些关于 Google Javascript API 或 JSONP 的内容，但到目前为止还没有明确的答案......
Could anyone enlight me?
有人可以启发我吗？
Thanks!
谢谢！
回答by Daniel Vassallo
I can see no advantage in using the Server-side Geocoding Web Servicewhen Google Maps provides a full featured Client-side Geocoding APIfor JavaScript.
当 Google Maps为 JavaScript提供功能齐全的客户端地理编码 API 时，我看不出使用服务器端地理编码 Web 服务的优势。
First of all, this automatically solves your same-origin problem, and in addition the request limits would be calculated per client IP address instead of of per server IP address, which can make a huge difference for a popular site.
首先，这会自动解决您的同源问题，此外，请求限制将按客户端 IP 地址计算，而不是按服务器 IP 地址计算，这对于流行站点来说可能会产生巨大的差异。
Here's a very simple example using the JavaScript Geocoding API v3:
这是一个使用 JavaScript Geocoding API v3 的非常简单的示例：
<script src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var geocoder = new google.maps.Geocoder();
var address = 'London, UK';
if (geocoder) {
geocoder.geocode({ 'address': address }, function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
console.log(results[0].geometry.location);
}
else {
console.log("Geocoding failed: " + status);
}
});
}
</script>
If for some reason you still want to use the server-side web-service, you could set up a very simple reverse proxy, maybe using mod_proxyif you are using Apache. This would allow you to use relative paths for your AJAX requests, while the HTTP server would be acting as a proxy to any "remote" location.
如果出于某种原因您仍然想使用服务器端 Web 服务，您可以设置一个非常简单的反向代理，如果您使用的是 Apache ，可以使用mod_proxy。这将允许您为 AJAX 请求使用相对路径，而 HTTP 服务器将充当任何“远程”位置的代理。
The fundamental configuration directive to set up a reverse proxy in mod_proxy is the ProxyPass. You would typically use it as follows:
在 mod_proxy 中设置反向代理的基本配置指令是 ProxyPass。您通常会按如下方式使用它：
ProxyPass /geocode/ http://maps.google.com/maps/api/geocode/
In this case, the browser could make a request to /geocode/output?parametersbut the server would serve this by acting as a proxy to http://maps.google.com/maps/api/geocode/output?parameters.
在这种情况下，浏览器可以向 发出请求，/geocode/output?parameters但服务器将通过充当 的代理来提供服务http://maps.google.com/maps/api/geocode/output?parameters。
