ASP.NET API Header Content-Length for binary data

Question

I have a Asp.net API app built on .net 4.8 and running on windows server data center 2019.

I have an API request where an image is uploaded in the in the request content as binary data. Is it possible to get the header's content-length value for this? If so how as I'm not seeing it in the list of headers.

I have a similar API were the image is serialized and added to the request content as json and I am able to get the content-length header value for these.

Thanks.

Answer 1

Hi @moondaddy ,

I have an API request where an image is uploaded in the in the request content as binary data. Is it possible to get the header's content-length value for this?

Based on your description, I think you have encapsulated the image data into DTO(Data Transfer Object). And if you want to get the Content-length, just get this parameter in Request: Request.Content.Headers.ContentLength.

Here is a simple example:

   [HttpPost]  
           public IHttpActionResult Upload([FromBody] ImageInfo image)  
           {  
               //get request content length  
               long? contentLength = Request.Content.Headers.ContentLength;  
     
               return Ok();  
           }  

And the result like this:

Hope this can help you. But if I misunderstood anything, just let me know.

Best regards,
Xudong Peng

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