CODEWITHSUNDEEP
c#.net.net-core
user5062472
user5062472

Reputation:

Sending file through API endpoint

I'm building a simple API using .NET core, and would like to send a simple .json file to the client once he reaches a certain endpoint on the API.

So far I'm having very little success, but what I currently have is the following:

public IActionResult yaddayadda(){
        var filePath = "./Data/file.json";

        using (var stream = new FileStream(@filePath, FileMode.Open))
        {
            return new FileStreamResult(stream, "application/json");
        }
}

This gets me nothing. (The path for the file is correct)

Thanks!

EDIT: I've experimented with different content-types, and even though it's not the correct one, multipart/form-data allows me to download a file, but it has no extension.

Upvotes: 0

Views: 942

Answers (2)

cortisol
cortisol

Reputation: 363

Try to use 

byte[] fileBytes = System.IO.File.ReadAllBytes(filePath);
string fileName = "file.json";
return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, fileName);

Useful link.

Upvotes: 1

Mario Vernari
Mario Vernari

Reputation: 7306

Try this, by avoiding the disposal (so the closure) of the stream:

public IActionResult yaddayadda(){
    var filePath = "./Data/file.json";

    var stream = new FileStream(@filePath, FileMode.Open);
    return new FileStreamResult(stream, "application/json");
}

UPDATE: Here is another way I use with pictures, although should behave the same:

    public IActionResult yaddayadda()
    {
        var filePath = "./Data/file.json";
        return this.PhysicalFile(filePath, "application/json");
    }

Note that this solution implies that you're deriving from the Controller class, because the "PhysicalFile" method is exposed by.

Upvotes: 3

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