Go Gin-Gonic, get text from POST request

Question

I'm starting to develop a REST API using Go and package Gin-Gonic. The idea is to create a REST API that receives POST requests in a JSON format and redirects this call to another application (also a API). Here is a peace of code:

package main

import (
    "fmt"

    "github.com/gin-gonic/gin"
    "net/http"
)
func main() {
    r := gin.Default()
    r.GET("/status", func(c *gin.Context) {
        c.String(200, "on")
    })

    r.GET("/user/:name", func(c *gin.Context) {
        name := c.Param("name")
        c.String(http.StatusOK, "Hello %s", name)
    })

    r.GET("/user/:name/:action", func(c *gin.Context) {
        name := c.Param("name")
        action := c.Param("action")
        message := name + " is " + action
        c.String(http.StatusOK, message)
    })

    r.POST("/foo", func(c *gin.Context) {
        fmt.Printf("%s", "At least I got here")
        message := c.PostForm() //???
        c.JSON(200, gin.H{"status": message}) //???
    })
    r.Run(":8080") // listen an
}

At function r.Posts("/foo",...) I would like c.JSON to send me back the full JSON that I sent:

curl -H "Content-Type: application/json" -X POST -d '{"user":"xyz","password":"xyz"}' http://localhost:8080/foo

I've seen examples where they bind the JSON file by creating a struct with the same structure as the input JSON (check Gin-Gonic examples at https://github.com/gin-gonic/gin ). However I only need to resend the full string without taking care of the format. Any ideas?

I ended up creating a struct and parsing my json to the struct. As far as I know I can't simply get any JSON. — Salami

mstafkmx mstafkmx · Accepted Answer · 2017-02-15T11:35:20

Try this example:

package main

import (
    "fmt"

    "github.com/gin-gonic/gin"
    "net/http"
)

type LOGIN struct{
    USER string `json:"user" binding:"required"`
    PASSWORD string `json:"password" binding:"required"`
}

func main() {
    r := gin.Default()
    r.GET("/status", func(c *gin.Context) {
        c.String(200, "on")
    })

    r.GET("/user/:name", func(c *gin.Context) {
        name := c.Param("name")
        c.String(http.StatusOK, "Hello %s", name)
    })

    r.GET("/user/:name/:action", func(c *gin.Context) {
        name := c.Param("name")
        action := c.Param("action")
        message := name + " is " + action
        c.String(http.StatusOK, message)
    })

    r.POST("/foo", func(c *gin.Context) {
        var login LOGIN
        c.BindJSON(&login)
        c.JSON(200, gin.H{"status": login.USER}) // Your custom response here
    })
    r.Run(":8080") // listen for incoming connections
}

Go Gin-Gonic, get text from POST request

2 Answers