🤔 always get empty JSON response

[washanhanzi]

Question description

• I always got empty {} from JSON response.
• no error is returned from the c.JSON() method.
• I tested in Postman, the response is always an empty object like {}. with JSONP method, the response is always callback{}.
• I don't know what happened or how to dig into this problem.
• version: 1.7.0

Code snippet (optional)

type status struct {
	code    int32
	message string
}

...
       data := status{
		code:    2,
		message: "hello wolrd",
	}
	if err := c.JSON(data); err != nil {
		log.Printf("error in response %v", err)
	}

[welcome]

Thanks for opening your first issue here! 🎉 Be sure to follow the issue template!

[Fenny]

Make sure that your struct keys are exported using capitalization so the JSON parser can access it.

package main

import (
  "github.com/gofiber/fiber"
)

func main() {
  app := fiber.New()

  type status struct {
    Code    int32
    Message string
  }

  // {"Code":200,"Message":"Hello, World"}
  app.Get("/", func(c *fiber.Ctx) {
    c.JSON(status{200, "Hello, World"})
  })

  type statusLwr struct {
    Code    int32  `json:"code"`
    Message string `json:"message"`
  }

  // {"code":200,"message":"Hello, World"}
  app.Get("/", func(c *fiber.Ctx) {
    c.JSON(statusLwr{200, "Hello, World"})
  })

  // {"code":200,"message":"Hello, World"}
  app.Get("/", func(c *fiber.Ctx) {
    c.JSON(fiber.Map{"code": 200, "message": "Hello, World"})
  })

  app.Listen(3000)
}

[washanhanzi]

I hate to ask this, but I am really new to golang. Fiber is my first framework to try out.

How to get v2.0.0?

I use:

import (
	"github.com/gofiber/fiber/v2"
)

the go mod report:

cannot load github.com/gofiber/fiber/v2: module github.com/gofiber/fiber@latest found (v1.7.0), but does not contain package github.com/gofiber/fiber/v2

I also tried the github.com/gofiber/fiber@2.0.0, but when I run go get -u, the import package automatic truncated the version.

I read in the blog, the pre-release version must contain a hyphen ?

[washanhanzi]

It worked after I change to Uppercase. Thank you for the reply.

[Fenny]

@washanhanzi, the pre-release is removed, try to run go get -u github.com/gofiber/fiber.
To see what version you are using, try to print:

package main

import (
   "fmt"
   "github.com/gofiber/fiber"
)

func main() {
   fmt.Println(fiber.Version)
}

If this doesn't work, delete the fiber folder ~/go/src/github.com/gofiber/fiber and run:
go get -u github.com/gofiber/fiber again

[washanhanzi]

In the go.mod file, it says v1.7.0, but the fiber.Version command and the logo output in the console both say v1.6.1.

T_T

Also got v1.7.0 in the go mod cache file, $GOPATH/pkg/mod/github.com/gofiber/fiber@v1.7.0.

Never see v2.0.0 even after clean the go mod cache.

[washanhanzi]

I found the Version in 33th line in application.go maybe inconsistent with the 1.7.0 release version.

[washanhanzi]

I'm closing the issue.

I will try to figure out the go mod. T_T

Thank you for the great framework.