How do I get the raw request body from the Request Content object using net 4 api endpoint

Question

I m trying to capture the raw request data for accountability and want to pull the request body content out of the Request object   I ve seen suggestions doing a Request InputStream  but this method is not available on the Request object   Any idea of how to get a string representation of the Request Content body

User · Answer

For other future users who do not want to make their controllers asynchronous  or cannot access the HttpContext  or are using dotnet core  this answer is the first I found on Google trying to do this   the following worked for me    HttpPut   pathId   subPathId     public IActionResult Put int pathId  int subPathId   FromBody  myViewModel viewModel         var body   new StreamReader Request Body         The modelbinder has already read the stream and need to reset the stream index     body BaseStream Seek 0  SeekOrigin Begin        var requestBody   body ReadToEnd          etc  we use this for an audit trail

User · Answer

In your comment on  Kenneth s answer you re saying that ReadAsStringAsync   is returning empty string  That s because you  or something - like model binder  already read the content  so position of internal stream in Request Content is on the end  What you can do is this  public static string GetRequestBody         var bodyStream   new StreamReader HttpContext Current Request InputStream       bodyStream BaseStream Seek 0  SeekOrigin Begin       var bodyText   bodyStream ReadToEnd        return bodyText

User · Answer

You can get the raw data by calling ReadAsStringAsAsync on the Request Content property   string result   await Request Content ReadAsStringAsync      There are various overloads if you want it in a byte or in a stream  Since these are async-methods you need to make sure your controller is async   public async Task lt IHttpActionResult gt  GetSomething         var rawMessage   await Request Content ReadAsStringAsync                   return Ok        EDIT  if you re receiving an empty string from this method  it means something else has already read it  When it does that  it leaves the pointer at the end  An alternative method of doing this is as follows   public IHttpActionResult GetSomething         var reader   new StreamReader Request Body       reader BaseStream Seek 0  SeekOrigin Begin        var rawMessage   reader ReadToEnd         return Ok        In this case  your endpoint doesn t need to be async  unless you have other async-methods

User · Answer

If you need to both get the raw content from the request  but also need to use a bound model version of it in the controller  you will likely get this exception   NotSupportedException  Specified method is not supported     For example  your controller might look like this  leaving you wondering why the solution above doesn t work for you   public async Task lt IActionResult gt  Index WebhookRequest request        using var reader   new StreamReader HttpContext Request Body           this won t fix your string empty problems        because exception will be thrown     reader BaseStream Seek 0  SeekOrigin Begin        var body   await reader ReadToEndAsync            Do stuff     You ll need to take your model binding out of the method parameters  and manually bind yourself   public async Task lt IActionResult gt  Index         using var reader   new StreamReader HttpContext Request Body           You shouldn t need this line anymore         reader BaseStream Seek 0  SeekOrigin Begin           You now have the body string raw     var body   await reader ReadToEndAsync            As well as a bound model     var request   JsonConvert DeserializeObject lt WebhookRequest gt  body       It s easy to forget this  and I ve solved this issue before in the past  but just now had to relearn the solution  Hopefully my answer here will be a good reminder for myself

[c#] How do I get the raw request body from the Request.Content object using .net 4 api endpoint

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