换了src地址，就会报错：Image from origin 'http://bubuol.com' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:53155' is therefore not allowed access.

原因分析：

image Access-Control-Allow-Origin

解决办法：通过设置头信息（Access-Control-Allow-Origin）


            C#的config配置

<system.webServer>

    <httpProtocol>

        <customHeaders>

            <add name="Access-Control-Allow-Origin" value="*" />

        </customHeaders>

    </httpProtocol>

<system.webServer>

             或者response.addHeader("Access-Control-Allow-Origin", "*");// 允许所有的域名
             或者response.addHeader("Access-Control-Allow-Origin", "http://camnpr.com");// 允许指定的域名

换了src地址，就会报错：Image from origin 'http://bubuol.com' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:53155' is therefore not allowed access.

原因分析：

解决办法：通过设置头信息（Access-Control-Allow-Origin）

Canvas Cross initialize Image Test: Testing for Canvas Cross Domain Image CORS Support

Testing...