Send a base64 image from View to a ASP.NET Controller

Question

I'm trying to send a base64 image from a View to a Controller.

I have the base64 stored in an input and I get it like this (working fine):

var photoBase64Captured = $('#txtPhotoBase64Captured').val();

Then in my View, I call the Controller and wait for a response:

$.get("@Url.Action("CheckFace", "User")", { base64: photoBase64Captured }, function (data) {

   var result = $.parseJSON(data);

   if (data != null) {

   }
});

When I try to call the Controller, I'm getting the following error in Chrome's console:

Failed to load resource: net::ERR_SPDY_PROTOCOL_ERROR

This is the Controller:

public async Task<ActionResult> CheckFace(string base64)
{

}

Any ideas why this is happening? Is the base64 too long to send to the Controller?

If I send other values to the Controller it works fine, so it is not a problem of the method.

Looks like Chrome issue, did you try another browser? Another possible issue is using $.get(), because sending (large) data to service should be done using POST request, with data in the body of request. Could you provide the code of corresponding controller's method? — apdevelop
– apdevelop, Commented Mar 2, 2018 at 13:39
@perozzo , check this link stackoverflow.com/questions/46863910/… — Ray
– Ray, Commented Mar 2, 2018 at 13:41
@perozzo, Is it GET or POST controller action? Looks like you're exceeding limits of GET request (url length). Try the solution suggested above by @ray with POST request. — apdevelop
– apdevelop, Commented Mar 2, 2018 at 13:51
@apdevelop it's a GET since I'll not post anything, just return the result on the controller back to the view. — gregoryp
– gregoryp, Commented Mar 2, 2018 at 13:52

Ahmar · Accepted Answer · 2018-03-04 01:39:39Z

2

You need to use post for in this case. Image base64 to large for Get request.

$.post("@Url.Action("CheckFace", "User")", { base64: photoBase64Captured }, function (data) {

   var result = $.parseJSON(data);

   if (data != null) {

   }
});

[HttpPost]
public async Task<ActionResult> CheckFace(string base64)
{

}

edited Mar 4, 2018 at 1:39

answered Mar 3, 2018 at 4:26

Ahmar

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