AWS Lambda访问本地资源或存储C#

Question

如何使用C#在Lambda中存储和访问文件我使用了lambda可用的tmp文件夹,但是我收到了无法加载文件或程序集的错误.我该如何解决错误？我使用了ADP nuget.

        using (WebClient webClient = new WebClient())
        {
            webClient.DownloadFile(reportLine, Path.GetTempPath() + 
            "sample_auth.key");
        }

我用它将文件下载到lambda的tmp文件夹中.我没有在字符串保密中包含其他配置,但您可以检查下面的github以获得完全相同的样本.

    string config = @"{
           ""sslCertPath"": ""/tmp/sample.pfx"",
           ""sslKeyPath"": ""/tmp/sample_auth.key"",
           }";

        ADPAccessToken token = null;

        if (String.IsNullOrEmpty(clientconfig))
        {
            Console.WriteLine("Settings file or default options not available.");
        }
        else
        {
              ClientCredentialConfiguration connectionCfg = JSONUtil.Deserialize<ClientCredentialConfiguration>(clientconfig);
              ClientCredentialConnection connection = (ClientCredentialConnection)ADPApiConnectionFactory.createConnection(connectionCfg);

            //context.Logger.Log(ADPApiConnection.certificatepath);
            //context.Logger.Log(clientconfig);
            try
            {
                connection.connect();
                if (connection.isConnectedIndicator())
                {
                token = connection.accessToken;

                    //    context.Logger.Log("Connected to API end point");
                    //    //Console.WriteLine("Token:  ");
                    //    //Console.WriteLine("         AccessToken: {0} ", token.AccessToken);
                    //    //Console.WriteLine("         TokenType: {0} ", token.TokenType);
                    //    //Console.WriteLine("         ExpiresIn: {0} ", token.ExpiresIn);
                    //    //Console.WriteLine("         Scope: {0} ", token.Scope);
                    //    //Console.WriteLine("         ExpiresOn: {0} ", token.ExpiresOn);
                    //    //Console.ReadLine();
                }
            }
            catch (ADPConnectionException e)
            {
                context.Logger.Log(e.Message);
            }
            //catch (Exception e)
            //{
            //    context.Logger.Log(e.Message);
            //}
            //Console.Read();
        }

        return "Ok";
    }

我得到一个错误,我认为lambda检查/ var/task文件夹

errorMessage": "One or more errors occurred. (Could not load file or 
assembly 'System.Net.Http.WebRequest, Version=4.0.0.0, Culture=neutral, 
PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file 
specified.\n)",
 "cause":   {
"errorType": "FileNotFoundException",
"errorMessage": "Could not load file or assembly 
'System.Net.Http.WebRequest, Version=4.0.0.0, Culture=neutral, 
  PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file 
 specified.\n",

以下是示例程序:https://github.com/adplabs/adp-connection-NET/blob/master/ADPClientDemo/Program.cs

我可以在控制台上运行程序,但是当我尝试在lambda中执行它时,我收到错误.是因为来自AWS的NuGet吗？

我有以下NuGet

Amazon Lambda Core
Amazon Lambda S3 Events 
Amazon lambda Serialization json
AWS SDK Core 
Microsoft Asp Net Web Api Client 
ADP library connection NET

Answer 1

无法加载文件或程序集:System.Net.Http.WebRequest

该错误似乎是由版本问题引起的,我认为您需要使用.Net核心版本的System.Net.Http.WebRequestdll或更高版本的.Net 4.0才能使用.NET Core 2.0.

实际上请看到这个答案你可能运气不好:你使用的库需要发布目标.NET Core:https://github.com/dotnet/corefx/issues/28267#issuecomment-396349873

另请参阅/sf/answers/2917865121/并且无法在.NET AWSSDK中为单声道加载文件或程序集"System.Net.Http.Webrequest"以获取类似的版本问题和修复.

如果这不能解决问题,请考虑使用AWS API.您可以将sample_auth.key文件放在S3存储桶上并读取它,例如 https://docs.aws.amazon.com/lambda/latest/dg/with-s3.html

或者根据您链接的示例,他们将json文件打包为Lambda:https: //github.com/adplabs/adp-connection-NET/tree/master/ADPClientDemo/Content/config

他们使用读取它StreamReader,也许这将使用System.IODLL而不是试图找到System.Net.Http.WebRequestDLL:

string configFileName = "default.json";
StreamReader sr = new StreamReader("..\\..\\Content\\config\\" + configFileName);
string clientconfig = sr.ReadToEnd();