如何从一个跨域API获取数据 [英] How can I get data from a Cross domain API
问题描述
我想从不同域中的API获取数据，但我得到这个错误：
I'm trying to get data from an API in a different domain but I get this error:
XMLHtt prequest无法加载 https://www.bitstamp.net/api/ticker/ 。没有
访问控制允许来源标头present的要求
资源。因此，原产地的'localhost'是不允许的
访问。
XMLHttpRequest cannot load https://www.bitstamp.net/api/ticker/. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'localhost' is therefore not allowed access.
我试图在头添加此，但它仍然无法正常工作：
I tried to add this in the header but it still doesn't work:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
Access-Control-Allow-Origin: https://www.bitstamp.net
</head>
<body>
<script src="Index.js"></script>
</body>
</html>
这是我的JavaScript：
This is my JavaScript:
var ticker = "https://www.bitstamp.net/api/ticker/";
$.ajax({
dataType: "json",
url: ticker,
type: "POST",
crossDomain: true,
scriptCharset: "utf-8"
});
我不能使用 JSONP ，因为该网站不支持这一点。
我怎样才能收到不同的域上从JSON API的数据？
我想是 JavaScript或C＃这样做
I can not use JSONP because the website doesn't support this. How can I receive the data from the API with JSON on a different domain? I would like to do this with JavaScript or C#.
推荐答案
添加类到你的项目，并用它标记您的控制器
add class to you project and mark your Controllers with it
public class AllowCrossSiteAttribute : ActionFilterAttribute {
public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
{
if (actionExecutedContext.Response != null)
actionExecutedContext.Response.Headers.Add("Access-Control-Allow-Origin", "*");
base.OnActionExecuted(actionExecutedContext);
}
}
}
然后控制器添加到控制器的方法选择，因为第一次调用将选项来得到，如果十字allowd
then in Controller add to controller method option because first call will be to options to get if CROSS is allowd
[System.Web.Http.AllowAnonymous]
public HttpResponseMessage Options()
{
return new HttpResponseMessage(HttpStatusCode.OK);
}
（请不，在这里你允许所有域名，但你可以用你的域列表取代*）
(Please not that here you allow all domain but you can replace "*" with list of your domains)
或者使用Web配置（但它会为所有控制器）
Or using web config (But it will be for all controllers)
<system.webServer>
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Origin" value="*" />
<add name="Access-Control-Allow-Headers" value="Content-Type, Authorization" />
<add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
</customHeaders>
</httpProtocol>
</system.webServer>
选件asp.net web表单可能是
Option for asp.net web forms could be
Response.AppendHeader("Access-Control-Allow-Origin", "*");
这篇关于如何从一个跨域API获取数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
