[GIN-debug] [WARNING] Headers were already written. Wanted to override status code 200 with 500 about gin HOT 4 CLOSED

check your code, if response 200 before return 500 or not ?

from gin.

use g.Writer.Write will default to returning 200，when returning the stream to the client, an exception may occur where the code and header have already reached the client

from gin.

If you just want to temporarily store data, you can

var tmp bytes.Buffer
tmp.Write(bs)

finally like:

func exampleDemo(g *gin.Context){
	// save data
	var tmp bytes.Buffer
        tmp.Write(bs)
		
	// use xml to set error code and msg
	if err != nil {
		g.XML(500,errorxml)
                return
	}

        // success
       g.Writer.Write(b.Bytes())
}

from gin.

It's impossible，data bytes maybe 2G or bigger.
I think it is not a bug, it's my problem

from gin.