Gin Responding with HTTP 204 - Nineya|java/go/python

I am having trouble understanding how to respond with HTTP 204 (no content) using gin.Context.

Tried context.JSON(204, nil) or just gin.H{} but both complain that the body is not empty.

Error #01: http: request method or response status code does not allow body
     Meta: [<nil>]

Any help or pointer much appreciated!

Thanks

Comment From: matejkramny

c.Abort(204) works but feels very wrong to be calling Abort on a request.

Comment From: petard

Comment From: itsjamie

We write a 204 by using the gin.ResponseWriter in the context object.

c.Writer.WriteHeader(http.StatusNoContent)

Comment From: techjanitor

You can use Data

https://github.com/gin-gonic/gin/blob/master/context.go#L362

http://play.golang.org/p/Y0sDeUcLjv

c.Data(204, gin.MIMEHTML, nil)

Comment From: eexit

All of these work but what if I want a JSON content type anyway?

I wish there were a easier way to do this:

// Sends a JSON response with no content
c.Writer.Header().Set("Content-Type", "application/json; charset=utf-8")
c.Writer.WriteHeader(http. StatusNoContent)

Maybe a test that if c.JSON(204, nil) is passed, it outputs nothing instead of null.

Or make a gin.NoContent constant?

Comment From: javierprovecho

@eexit working on it 😉

cc / @appleboy

Comment From: javierprovecho

@eexit done!

Comment From: Apologiz

@matejkramny, you can use c.Status(http.StatusNoContent)

Comment From: kuchaguangjie

So, which is preferred now ? ctx.Status(http.StatusNoContent) ?

Comment From: OhJuhun

@Apologiz c.Status() doesnt update ResponseRecorder.Code. Is it OK?

Comment From: shahzadhaider1

I had a case where I was writing tests for my handler. I was using c.Status. Despite everything being correct and error-free, my tests were failing. Specifically, my delete handler was supposed to return a 204 status code on success, but the HTTP Response Recorder in my tests was showing a status code of 200 instead.

To resolve this, I modified the handler's return line to c.JSON(http.StatusNoContent, nil). After this change, the tests passed. It turns out that c.Status wasn't setting the HTTP Response Recorder's code correctly.