跨域访问

public class AccessManageModel
{
    private CosXml cosXml; //将服务用户设置成数据成员
    // 初始化COS服务实例
    private void InitCosXml()
    {
        string region = Environment.GetEnvironmentVariable("COS_REGION");
        CosXmlConfig config = new CosXmlConfig.Builder()
            .SetRegion(region) // 设置默认的地域, COS 地域的简称请参照 https://cloud.tencent.com/document/product/436/6224
            .Build();
        string secretId = Environment.GetEnvironmentVariable("SECRET_ID"); // 云 API 密钥 SecretId, 获取 API 密钥请参照 https://console.cloud.tencent.com/cam/capi
        string secretKey = Environment.GetEnvironmentVariable("SECRET_KEY"); // 云 API 密钥 SecretKey, 获取 API 密钥请参照 https://console.cloud.tencent.com/cam/capi
        long durationSecond = 600; //每次请求签名有效时长，单位为秒
        QCloudCredentialProvider qCloudCredentialProvider = new DefaultQCloudCredentialProvider(secretId, secretKey, durationSecond);
        this.cosXml = new CosXmlServer(config, qCloudCredentialProvider);
    }
}

public void PutBucketCors()
{
    try
    {
        // 存储桶名称，此处填入格式必须为 bucketname-APPID, 其中 APPID 获取参考 https://console.cloud.tencent.com/developer
        string bucket = "examplebucket-1250000000";
        PutBucketCORSRequest request = new PutBucketCORSRequest(bucket);
        //设置跨域访问配置 CORS
        COSXML.Model.Tag.CORSConfiguration.CORSRule corsRule =
            new COSXML.Model.Tag.CORSConfiguration.CORSRule();
        corsRule.id = "corsconfigureId";
        corsRule.maxAgeSeconds = 6000;

        corsRule.allowedOrigins = new List<string>();
        corsRule.allowedOrigins.Add("http://cloud.tencent.com");

        corsRule.allowedMethods = new List<string>();
        corsRule.allowedMethods.Add("PUT");

        corsRule.allowedHeaders = new List<string>();
        corsRule.allowedHeaders.Add("Host");

        corsRule.exposeHeaders = new List<string>();
        corsRule.exposeHeaders.Add("x-cos-meta-x1");

        request.SetCORSRule(corsRule);

        //执行请求
        PutBucketCORSResult result = cosXml.PutBucketCORS(request);
        //请求成功
        Console.WriteLine(result.GetResultInfo());
    }
    catch (COSXML.CosException.CosClientException clientEx)
    {
        Console.WriteLine("CosClientException: " + clientEx);
    }
    catch (COSXML.CosException.CosServerException serverEx)
    {
        Console.WriteLine("CosServerException: " + serverEx.GetInfo());
    }
}

public void GetBucketCors()
{
    try
    {
        // 存储桶名称，此处填入格式必须为 bucketname-APPID, 其中 APPID 获取参考 https://console.cloud.tencent.com/developer
        string bucket = "examplebucket-1250000000";
        GetBucketCORSRequest request = new GetBucketCORSRequest(bucket);
        //执行请求
        GetBucketCORSResult result = cosXml.GetBucketCORS(request);
        //存储桶的 CORS 配置信息
        CORSConfiguration conf = result.corsConfiguration;
    }
    catch (COSXML.CosException.CosClientException clientEx)
    {
        Console.WriteLine("CosClientException: " + clientEx);
    }
    catch (COSXML.CosException.CosServerException serverEx)
    {
        Console.WriteLine("CosServerException: " + serverEx.GetInfo());
    }
}

public void DeleteBucketCors()
{
    try
    {
        // 存储桶名称，此处填入格式必须为 bucketname-APPID, 其中 APPID 获取参考 https://console.cloud.tencent.com/developer
        string bucket = "examplebucket-1250000000";
        DeleteBucketCORSRequest request = new DeleteBucketCORSRequest(bucket);
        //执行请求
        DeleteBucketCORSResult result = cosXml.DeleteBucketCORS(request);
        //请求成功
        Console.WriteLine(result.GetResultInfo());
    }
    catch (COSXML.CosException.CosClientException clientEx)
    {
        Console.WriteLine("CosClientException: " + clientEx);
    }
    catch (COSXML.CosException.CosServerException serverEx)
    {
        Console.WriteLine("CosServerException: " + serverEx.GetInfo());
    }
}