将临时文件存储在.net lambda中，然后发布到s3Bucket

Question

我正在使用.net c#Lambda函数生成一个.csv文件，以便进一步存储在s3存储桶中。

这是我遵循的过程：

1. 生成.csv并将其存储在lambda函数执行的/tmp/文件夹中。在这个步骤中，我不确定它是否真的在那个路径中保存文件。

   //filepath = @"/tmp/test.csv"
   try
   {
   using (System.IO.StreamWriter file = new System.IO.StreamWriter(@filepath, true))
   {
   file.WriteLine(ID + "," + workItemType + "," + title + "," + assignedTo + "," + state + "," + iterationPath);                    
   Console.WriteLine("Successfully added");
   }
   }
   catch (Exception ex)
   {
   throw new ApplicationException(" somethings wrong: ", ex);
   }
   

2. 将文件上传到s3 bucket。

   try
   {
   await client.PutObjectAsync(new Amazon.S3.Model.PutObjectRequest
   {
   BucketName = "mys3bucket",
   Key = "test.csv",
   ContentType = @"/tmp/test.csv"
   });
   await Task.CompletedTask;
   }
   catch (Exception ex)
   {
   Console.WriteLine("Exception in PutS3Object:" + ex.Message);                ;
   }
   

在最后一步中，我得到了这个错误消息：

PutS3Object中的异常：值'\tmp\test.csv'的格式无效。

我做错了什么？

Answer 1

您需要发送数据以包含在csv文件中：

await client.PutObjectAsync(new Amazon.S3.Model.PutObjectRequest
{
BucketName = "mys3bucket",
Key = "test.csv",
ContentBody = DATAINSTRINGFORMAT,
ContentType = @"text/csv"
});

或作为文件路径发送：

await client.PutObjectAsync(new Amazon.S3.Model.PutObjectRequest
{
BucketName = "mys3bucket",
Key = "test.csv",
FilePath = FILEPATHONYOURTEMPFOLDER,
ContentType = @"text/csv"
});