为了方便ASMX服务的多域访问，我在全局中创建了这个函数。asax文件:

protected void Application_BeginRequest(object sender, EventArgs e)
{
    string CORSServices = "/account.asmx|/account2.asmx";
    if (CORSServices.IndexOf(HttpContext.Current.Request.Url.AbsolutePath) > -1)
    {
        string allowedDomains = "http://xxx.yyy.example|http://aaa.bbb.example";

        if(allowedDomains.IndexOf(HttpContext.Current.Request.Headers["Origin"]) > -1)
            HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", HttpContext.Current.Request.Headers["Origin"]);

        if(HttpContext.Current.Request.HttpMethod == "OPTIONS")
            HttpContext.Current.Response.End();
    }
}

这也允许CORS处理OPTIONS动词。

听起来，推荐的方法是让服务器从客户端读取Origin头，将其与您希望允许的域列表进行比较，如果匹配，则将Origin头的值作为响应中的Access-Control-Allow-Origin头回显给客户端。

使用.htaccess，你可以这样做:

# ----------------------------------------------------------------------
# Allow loading of external fonts
# ----------------------------------------------------------------------
<FilesMatch "\.(ttf|otf|eot|woff|woff2)$">
    <IfModule mod_headers.c>
        SetEnvIf Origin "http(s)?://(www\.)?(google.com|staging.google.com|development.google.com|otherdomain.example|dev02.otherdomain.example)$" AccessControlAllowOrigin=$0
        Header add Access-Control-Allow-Origin %{AccessControlAllowOrigin}e env=AccessControlAllowOrigin
        Header merge Vary Origin
    </IfModule>
</FilesMatch>

Nginx用户允许多个域的CORS。我喜欢@marshall的例子，尽管他的回答只匹配一个域。为了匹配域和子域的列表，这个正则表达式可以很容易地使用字体:

location ~* \.(?:ttf|ttc|otf|eot|woff|woff2)$ {
   if ( $http_origin ~* (https?://(.+\.)?(domain1|domain2|domain3)\.(?:me|co|com)$) ) {
      add_header "Access-Control-Allow-Origin" "$http_origin";
   }
}

这将只回显与给定域列表匹配的“Access-Control-Allow-Origin”标头。

对于安装了URL重写2.0模块的iis7.5 +，请参阅此SO答案

谷歌对通过SSL服务广告的支持回答和RFC本身的语法似乎表明您可以用空格分隔url。不知道这在不同的浏览器中有多受支持。

下面是一个Java web应用的解决方案，基于yesthatguy的回答。

我使用的是Jersey REST 1.x

配置web.xml以识别Jersey REST和CORSResponseFilter

<!-- Jersey REST config -->
<servlet>
  <servlet-name>JAX-RS Servlet</servlet-name>
  <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
  <init-param>
    <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
    <param-value>true</param-value>
  </init-param>
  <init-param>
    <param-name>com.sun.jersey.spi.container.ContainerResponseFilters</param-name>
    <param-value>com.your.package.CORSResponseFilter</param-value>
  </init-param>
  <init-param>
    <param-name>com.sun.jersey.config.property.packages</param-name>
    <param-value>com.your.package</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>JAX-RS Servlet</servlet-name>
  <url-pattern>/ws/*</url-pattern>
</servlet-mapping>

下面是CORSResponseFilter的代码

import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerResponse;
import com.sun.jersey.spi.container.ContainerResponseFilter;


public class CORSResponseFilter implements ContainerResponseFilter{

    @Override
    public ContainerResponse filter(ContainerRequest request,
            ContainerResponse response) {
        
        String[] allowDomain = {"http://localhost:9000","https://my.domain.example"};
        Set<String> allowedOrigins = new HashSet<String>(Arrays.asList (allowDomain));                  
        
        String originHeader = request.getHeaderValue("Origin");
        
        if(allowedOrigins.contains(originHeader)) {
            response.getHttpHeaders().add("Access-Control-Allow-Origin", originHeader);
                        
            response.getHttpHeaders().add("Access-Control-Allow-Headers",
                    "origin, content-type, accept, authorization");
            response.getHttpHeaders().add("Access-Control-Allow-Credentials", "true");
            response.getHttpHeaders().add("Access-Control-Allow-Methods",
                    "GET, POST, PUT, DELETE, OPTIONS, HEAD");
        }
        
        return response;
    }
}