iClientOpenlayers引用本地iServer服务跨域

使用vs2017打开一个网站项目并在本地运行，然后引用本地iServer11.0.1上的data服务，但会报跨域，iServer11.0.1里面只加了一个data服务，请问这是什么原因？

引用代码如下：

function getAnalyzedData() {
    new ol.supermap.DatasetService(dataUrl).getDatasets("KenkeiResultDemo", function (serviceResult) {
        try {
            var datasetNames = serviceResult.result.datasetNames;
            datasetsSelect = document.getElementById("analyzedDataSel");
            for (let i = 0, len = datasetNames.length; i < len; i++) {
                datasetsSelect.options[i + 1] = new Option(datasetNames[i], datasetNames[i]);
            }
        }
        catch (e) { console.log("getDatasets error."); }
    });
}

跨域报错如下：

Access to fetch at 'http://localhost:8090/iserver/services/data-KenkeiDemo/rest/data/datasources/name/KenkeiResultDemo/datasets.json' from origin 'http://localhost:61974' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed. Have the server send the header with a valid value, or, if an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

之前iServer10.1.2请求是正常的，换成11.0.1就这样了，请问是iServer设置有什么问题吗

1个回答

您好，iServer 启动后默认允许来自任意域的跨域请求访问成功，通过修改 web.xml 配置文件（位于【SuperMap iServer 安装目录】\webapps\iserver\WEB-INF目录下）来配置跨域访问的白名单，如下所示：<init-param>
<param-name>cors.allowed.origins</param-name>
<param-value>*</param-value>
</init-param>

其中<param-value>的默认值为*，表示允许来自任意域的跨域请求访问成功。您可以检查一下iserver是否配置是否允许任意域的跨域请求访问成功。