Gin: Responding with HTTP 204

[matejkramny]

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

[matejkramny]

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

[petard]

+1

[itsjamie]

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

c.Writer.WriteHeader(http.StatusNoContent)

[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)

[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?

[javierprovecho]

@eexit working on it 😉

cc / @appleboy

[javierprovecho]

@eexit done!

[Apologiz]

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