I have a Microsoft Flow setup with the following steps
-
When a file is created (SharePoint) (this is pointing to a specific document library
-
Http (Http), Method: Post, Uri (pointing to my app), Body: File Content from the SharePoint step above.
My app that I have written is hosted in an Azure Web App and is written in C# in ASP.NET Core. I'm trying to convert the information that is coming into me from Flow back into the original document and I cannot figure out what is being sent. When
I look in Flow it says the body of the request that was sent is:
{
"$content-type": "image/jpeg",
"$content": "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"
}
In my application I originally tried to have a method that looks like
[HttpPost]
public IActionResult Process(List<IFormFile> files)
but that flow is not submitted a file, so I changed it to the below method
[HttpPost]
public IActionResult ProcessJson([FromBody]FlowFile file)
{
...
}
public class FlowFile
{
[JsonProperty(PropertyName = "$content-type")]
public string ContentType { get; set; }
[JsonProperty(PropertyName = "$content")]
public string Content { get; set; }
}
I also added a block of middleware, so that I could get the actual request body stream. The middleware that I added has method that looks like this
public async Task Invoke(HttpContext context)
{
var requestBodyStream = new MemoryStream();
var originalRequestBody = context.Request.Body;
await context.Request.Body.CopyToAsync(requestBodyStream);
requestBodyStream.Seek(0, SeekOrigin.Begin);
var requestBodyText = new StreamReader(requestBodyStream).ReadToEnd();
var bytes = StringToByteArray(requestBodyText);
LogRequestMiddleware.LastBody = System.Text.Encoding.Default.GetString(bytes);
requestBodyStream.Seek(0, SeekOrigin.Begin);
context.Request.Body = requestBodyStream;
await next(context);
context.Request.Body = originalRequestBody;
}
private static byte[] StringToByteArray(string hex)
{
return Enumerable.Range(0, hex.Length)
//.Where(x => x % 2 == 0)
.Select(x => Convert.ToByte(hex.Substring(x, 1), 8))
.ToArray();
}
When I do this The response that I get is below and I cannot figure how to get it back to the correct string that I want.

�����JFIF��`�`�����C�		


$.' ",#(7),01444'9=82<.342���C			

2!!22222222222222222222222222222222222222222222222222�����"��������������	
�������}�!1AQa"q2���#B��R��$3br�	
%&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�����������������������������������������������������������������������������������	
������w�!1AQaq"2�B����	#3R�br�
$4�%�&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�����������������������������������������������������������������������������?������+X�K�����21�c�Z��]�ӥg�v��;�:����������P����I�f�>���m;]�֬u�nm���`�Q�1�P6�s�9�|b�r|���G�
