预请求跨域配置

// 存储桶名称，由bucketname-appid 组成，appid必须填入，可以在COS控制台查看存储桶名称。 https://console.cloud.tencent.com/cos5/bucket
String bucket = "examplebucket-1250000000";
String cosPath = "exampleobject"; //对象位于存储桶中的位置标识符，即对象键
String origin = "https://cloud.tencent.com";
String accessMethod = "PUT";
OptionObjectRequest optionObjectRequest = new OptionObjectRequest(bucket,
        cosPath, origin,
        accessMethod);
cosXmlService.optionObjectAsync(optionObjectRequest,
        new CosXmlResultListener() {
    @Override
    public void onSuccess(CosXmlRequest cosXmlRequest, CosXmlResult result) {
        OptionObjectResult optionObjectResult = (OptionObjectResult) result;
    }

    // 如果您使用 kotlin 语言来调用，请注意回调方法中的异常是可空的，否则不会回调 onFail 方法，即：
    // clientException 的类型为 CosXmlClientException?，serviceException 的类型为 CosXmlServiceException?
    @Override
    public void onFail(CosXmlRequest cosXmlRequest,
                       @Nullable CosXmlClientException clientException,
                       @Nullable CosXmlServiceException serviceException) {
        if (clientException != null) {
            clientException.printStackTrace();
        } else {
            serviceException.printStackTrace();
        }
    }
});