Question

我创建了一个SSIS包，使用C＃脚本从HTTPS URL下载CSV文件。从Visual Studio执行时，一切正常。

但是，当我创建SQL代理作业时，包失败。如果我直接从SQL Server执行.dtsx文件，该包也会失败。

错误是

＆＃34;下载失败：从服务器获取的SSL证书响应无效。无法处理请求＆＃34;

我已经测试过从SQL服务器打开URL并可以查看该文件。我还在C＃脚本中添加了代码以忽略认证错误，但这似乎没有任何影响。我还在Connection Manager中输入了托管CSV的服务器的登录凭据，但也没有帮助。

CSV是通过Magento数据Feed生成的。在网站上，所有内容都被重定向到HTTPS。

我迷失在这里，希望有人可以帮忙。

以下是C＃脚本的片段：

public void Main()
    {
        // TODO: Add your code here
        try
        {

            // Ignore certificate warnings
            ServicePointManager.ServerCertificateValidationCallback =
                 new RemoteCertificateValidationCallback(delegate { return true; });

            // Disable server certificate validation.
            //ServicePointManager
            //    .ServerCertificateValidationCallback +=
            //    (sender, cert, chain, sslPolicyErrors) => true;
            //ServicePointManager.ServerCertificateValidationCallback = (sender, cert, chain, sslPolicyErrors) => true;

            //System.Net.ServicePointManager.ServerCertificateValidationCallback =
            //delegate (object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
            //{ return true; };

            // Logging start of download
            bool fireAgain = true;
            Dts.Events.FireInformation(0, "Download File", "Start downloading " + Dts.Connections["TEST"].ConnectionString, string.Empty, 0, ref fireAgain);

            // Get your newly added HTTP Connection Manager
            Object mySSISConnection = Dts.Connections["TEST"].AcquireConnection(null);

            // Create a new connection
            HttpClientConnection myConnection = new HttpClientConnection(mySSISConnection);

            // Download file and use the Flat File Connectionstring (D:\SourceFiles\Products.csv)
            // to save the file (and replace the existing file)                
            String filename = Dts.Variables["varFullPathScript"].Value.ToString();
            myConnection.DownloadFile(filename, true);

            // Logging end of download
            Dts.Events.FireInformation(0, "Download File", "Finished downloading" , string.Empty, 0, ref fireAgain);

            // Quit Script Task succesful
            Dts.TaskResult = (int)ScriptResults.Success;
        }
        catch (Exception ex)
        {
            // Logging why download failed
            Dts.Events.FireError(0, "Download File", "Download failed: " + ex.Message, string.Empty, 0);

            // Quit Script Task unsuccesful
            Dts.TaskResult = (int)ScriptResults.Failure;
        }

        Dts.TaskResult = (int)ScriptResults.Success;
    }

Answer 1

经过一番搔痒之后，我想我会尝试一些简单的东西，使用不同的方法来下载文件。我没有使用HTTP连接管理器，而是使用了webclient类。这似乎有效！

                WebClient webClient = new WebClient();
            //webClient.Credentials = new NetworkCredential("username", "PW", "domain"); //don't really need this unless URL requires auth
            webClient.DownloadFile(url, filename);

Answer 2

@Jonathan C - 首先，谢谢你的想法，我遇到了同样的问题，你救了我一天，但是

TLS 1.0 现在默认禁用，所以我有一个 “底层连接已关闭：发送时发生意外错误” 异常，直到在调用之前添加此字符串System.Net.ServicePointManager.SecurityProtocol=System.Net.SecurityProtocolType.Tls12;
我建议在这种情况下使用 using 关键字

所以我的最终结果是

        System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
        using (var webClient = new WebClient())
        {
            webClient.DownloadFile(@"https://url", @"C:\file");
        }

SSIS从http下载 - 从服务器获取的错误SSL认证响应无效

2 个答案: