How to Handle JSON Request and Response in Gin

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2026-04-17T12:05:42+00:00

Handle JSON in Gin using ShouldBindJSON for requests and c.JSON for responses.

Use gin.BindJSON to decode the request body into a struct and c.JSON to send a JSON response.

type Request struct { Name string }
type Response struct { Message string }

func handler(c *gin.Context) {
    var req Request
    if err := c.ShouldBindJSON(&req); err != nil {
        c.JSON(400, gin.H{"error": err.Error()})
        return
    }
    c.JSON(200, Response{Message: "Hello " + req.Name})
}