1. // run main.go
2. // address: http://localhost:8080/albums/2
3. // created this using a web tutorial -- keeping the code so I can fiddle around with it
4.  
5. package main
6.  
7. import (
8.         "net/http"
9.  
10.         "github.com/gin-gonic/gin"
11. )
12.  
13. // album represents data about a record album.
14. type album struct {
15.         ID     string  `json:"id"`
16.         Title  string  `json:"title"`
17.         Artist string  `json:"artist"`
18.         Price  float64 `json:"price"`
19. }
20.  
21. // albums slice to seed record album data.
22. var albums = []album{
23.         {ID: "1", Title: "Blue Train", Artist: "John Coltrane", Price: 56.99},
24.         {ID: "2", Title: "Jeru", Artist: "Gerry Mulligan", Price: 17.99},
25.         {ID: "3", Title: "Sarah Vaughan and Clifford Brown", Artist: "Sarah Vaughan", Price: 39.99},
26. }
27.  
28. func main() {
29.         router := gin.Default()
30.         router.GET("/albums", getAlbums)
31.         router.GET("/albums/:id", getAlbumByID)
32.         router.POST("/albums", postAlbums)
33.  
34.         router.Run("localhost:8080")
35. }
36.  
37. // getAlbums responds with the list of all albums as JSON.
38. func getAlbums(c *gin.Context) {
39.         c.IndentedJSON(http.StatusOK, albums)
40. }
41.  
42. // postAlbums adds an album from JSON received in the request body.
43. func postAlbums(c *gin.Context) {
44.         var newAlbum album
45.  
46.         // Call BindJSON to bind the received JSON to
47.         // newAlbum.
48.         if err := c.BindJSON(&newAlbum); err != nil {
49.                 return
50.         }
51.  
52.  
53.         // Add the new album to the slice.
54.         albums = append(albums, newAlbum)
55.         c.IndentedJSON(http.StatusCreated, newAlbum)
56. }
57.  
58. // getAlbumByID locates the album whose ID value matches the id
59. // parameter sent by the client, then returns that album as a response.
60. func getAlbumByID(c *gin.Context) {
61.         id := c.Param("id")
62.  
63.         // Loop through the list of albums, looking for
64.         // an album whose ID value matches the parameter.
65.         for _, a := range albums {
66.                 if a.ID == id {
67.                         c.IndentedJSON(http.StatusOK, a)
68.                         return
69.                 }
70.         }
71.         c.IndentedJSON(http.StatusNotFound, gin.H{"message": "album not found"})
72. }