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@geraldstanje geraldstanje/main.go forked from EtienneR/main.go
Created Sep 4, 2016

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package main
import (
"database/sql"
"gopkg.in/gorp.v1"
"log"
"strconv"
"github.com/gin-gonic/gin"
_ "github.com/go-sql-driver/mysql"
)
type User struct {
Id int64 `db:"id" json:"id"`
Firstname string `db:"firstname" json:"firstname"`
Lastname string `db:"lastname" json:"lastname"`
}
var dbmap = initDb()
func initDb() *gorp.DbMap {
db, err := sql.Open("mysql", "root:@/myapi")
checkErr(err, "sql.Open failed")
dbmap := &gorp.DbMap{Db: db, Dialect: gorp.MySQLDialect{"InnoDB", "UTF8"}}
dbmap.AddTableWithName(User{}, "User").SetKeys(true, "Id")
err = dbmap.CreateTablesIfNotExists()
checkErr(err, "Create tables failed")
return dbmap
}
func checkErr(err error, msg string) {
if err != nil {
log.Fatalln(msg, err)
}
}
func Cors() gin.HandlerFunc {
return func(c *gin.Context) {
c.Writer.Header().Add("Access-Control-Allow-Origin", "*")
c.Next()
}
}
func main() {
r := gin.Default()
r.Use(Cors())
v1 := r.Group("api/v1")
{
v1.GET("/users", GetUsers)
v1.GET("/users/:id", GetUser)
v1.POST("/users", PostUser)
v1.PUT("/users/:id", UpdateUser)
v1.DELETE("/users/:id", DeleteUser)
v1.OPTIONS("/users", OptionsUser) // POST
v1.OPTIONS("/users/:id", OptionsUser) // PUT, DELETE
}
r.Run(":8080")
}
func GetUsers(c *gin.Context) {
var users []User
_, err := dbmap.Select(&users, "SELECT * FROM user")
if err == nil {
c.JSON(200, users)
} else {
c.JSON(404, gin.H{"error": "no user(s) into the table"})
}
// curl -i http://localhost:8080/api/v1/users
}
func GetUser(c *gin.Context) {
id := c.Params.ByName("id")
var user User
err := dbmap.SelectOne(&user, "SELECT * FROM user WHERE id=? LIMIT 1", id)
if err == nil {
user_id, _ := strconv.ParseInt(id, 0, 64)
content := &User{
Id: user_id,
Firstname: user.Firstname,
Lastname: user.Lastname,
}
c.JSON(200, content)
} else {
c.JSON(404, gin.H{"error": "user not found"})
}
// curl -i http://localhost:8080/api/v1/users/1
}
func PostUser(c *gin.Context) {
var user User
c.Bind(&user)
log.Println(user)
if user.Firstname != "" && user.Lastname != "" {
if insert, _ := dbmap.Exec(`INSERT INTO user (firstname, lastname) VALUES (?, ?)`, user.Firstname, user.Lastname); insert != nil {
user_id, err := insert.LastInsertId()
if err == nil {
content := &User{
Id: user_id,
Firstname: user.Firstname,
Lastname: user.Lastname,
}
c.JSON(201, content)
} else {
checkErr(err, "Insert failed")
}
}
} else {
c.JSON(400, gin.H{"error": "Fields are empty"})
}
// curl -i -X POST -H "Content-Type: application/json" -d "{ \"firstname\": \"Thea\", \"lastname\": \"Queen\" }" http://localhost:8080/api/v1/users
}
func UpdateUser(c *gin.Context) {
id := c.Params.ByName("id")
var user User
err := dbmap.SelectOne(&user, "SELECT * FROM user WHERE id=?", id)
if err == nil {
var json User
c.Bind(&json)
user_id, _ := strconv.ParseInt(id, 0, 64)
user := User{
Id: user_id,
Firstname: json.Firstname,
Lastname: json.Lastname,
}
if user.Firstname != "" && user.Lastname != "" {
_, err = dbmap.Update(&user)
if err == nil {
c.JSON(200, user)
} else {
checkErr(err, "Updated failed")
}
} else {
c.JSON(400, gin.H{"error": "fields are empty"})
}
} else {
c.JSON(404, gin.H{"error": "user not found"})
}
// curl -i -X PUT -H "Content-Type: application/json" -d "{ \"firstname\": \"Thea\", \"lastname\": \"Merlyn\" }" http://localhost:8080/api/v1/users/1
}
func DeleteUser(c *gin.Context) {
id := c.Params.ByName("id")
var user User
err := dbmap.SelectOne(&user, "SELECT * FROM user WHERE id=?", id)
if err == nil {
_, err = dbmap.Delete(&user)
if err == nil {
c.JSON(200, gin.H{"id #" + id: "deleted"})
} else {
checkErr(err, "Delete failed")
}
} else {
c.JSON(404, gin.H{"error": "user not found"})
}
// curl -i -X DELETE http://localhost:8080/api/v1/users/1
}
func OptionsUser(c *gin.Context) {
c.Writer.Header().Set("Access-Control-Allow-Methods", "DELETE,POST, PUT")
c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type")
c.Next()
}
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