CODEWITHSUNDEEP
c#jqueryasp.net-mvc
Ron Saylor
Ron Saylor

Reputation: 381

ASP.NET MVC: Retrieving an .mp3 file and returning it to the user

I currently have an HTML page that contains a link:

<a href="javascript:void()" onclick="return getAudioFile('fileLocation');">Listen</a>

Clicking the "Listen" link calls this function:

    function getRecordingFile(fileLocation) {

    };

Which should ultimately call this controller method:

    [HttpPost]
    public ActionResult GetAudioFile(string fileLocation)
    {
        return null;
    }

I have emptied out the function and method because I have tried several different things to accomplish this: I need to access an audio file from a local location and allow the user to listen to it/download it upon clicking the Listen link.

What seems to be the best way to go about this?

Upvotes: 3

Views: 5939

Answers (3)

DA_123
DA_123

Reputation: 385

Other answers don't enable Partial Content so a user can't seek.

Before proceeding, you should also ensure that an attacker can't traverse the filesystem by providing ../../file or similar as a path

    [HttpGet]
    public ActionResult GetAudioFile(string fileLocation)
    {
        using var fs = new FileStream(fileLocation, FileMode.Open, FileAccess.Read);
        using var br = new BinaryReader(fs);
        long numBytes = new FileInfo(fileLocation).Length;
        var buff = br.ReadBytes((int)numBytes);
        var fileResult = File(buff, "audio/mpeg", "callrecording.mp3");
        fileResult.EnableRangeProcessing = true;
        return fileResult;
    }

Upvotes: 0

Ron Saylor
Ron Saylor

Reputation: 381

Here is the final result:

    [HttpGet]
    public ActionResult GetAudioFile(string fileLocation)
    {
        var bytes = new byte[0];


        using (var fs = new FileStream(fileLocation, FileMode.Open, FileAccess.Read)
        {
            var br = new BinaryReader(fs);
            long numBytes = new FileInfo(fileLocation).Length;
            buff = br.ReadBytes((int)numBytes);
        }

        return File(buff, "audio/mpeg", "callrecording.mp3");
    }

On the page, the link is:

<a href="/Controller/GetAudioFile?fileName=@fileLocation">Listen</a>

Kudos to my boss for the help.

Upvotes: 1

SlightlyMoist
SlightlyMoist

Reputation: 882

Use a FileResult perhaps? 

 [HttpPost]
 public FileResult GetAudioFile(string fileLocation)
 {
    using(FileStream fs = new FileStream(fileLocation)){

       return File(fs.ToArray(), "audio/mpeg");
    }

 }

Upvotes: 0

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