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Programming language: Go
Tags:
Utilities
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README
jsonhal
A simple Go package to make custom structs marshal into HAL compatible JSON responses.
Just add jsonhal.Hal as anonymous field to your structs and use SetLink to set hyperlinks and optionally SetEmbedded to set embedded resources.
Example:
package main
import (
"encoding/json"
"log"
"github.com/RichardKnop/jsonhal"
)
// HelloWorld ...
type HelloWorld struct {
jsonhal.Hal
ID uint `json:"id"`
Name string `json:"name"`
}
// Foobar ...
type Foobar struct {
jsonhal.Hal
ID uint `json:"id"`
Name string `json:"name"`
}
func main() {
var (
helloWorld *HelloWorld
jsonResponse []byte
err error
)
helloWorld = &HelloWorld{ID: 1, Name: "Hello World"}
helloWorld.SetLink("self", "/v1/hello/world/1", "")
jsonResponse, err = json.Marshal(helloWorld)
if err != nil {
log.Fatal(err)
}
log.Print(string(jsonResponse))
// {
// "_links": {
// "self": {
// "href": "/v1/hello/world/1"
// }
// },
// "id": 1,
// "name": "Hello World"
// }
helloWorld = &HelloWorld{ID: 1, Name: "Hello World"}
helloWorld.SetLink(
"self", // name
"/v1/hello/world?offset=2&limit=2", // href
"", // title
)
helloWorld.SetLink(
"next", // name
"/v1/hello/world?offset=4&limit=2", // href
"", // title
)
helloWorld.SetLink(
"previous", // name
"/v1/hello/world?offset=0&limit=2", // href
"", // title
)
jsonResponse, err = json.Marshal(helloWorld)
if err != nil {
log.Fatal(err)
}
log.Print(string(jsonResponse))
// {
// "_links": {
// "next": {
// "href": "/v1/hello/world?offset=4\u0026limit=2"
// },
// "previous": {
// "href": "/v1/hello/world?offset=0\u0026limit=2"
// },
// "self": {
// "href": "/v1/hello/world?offset=2\u0026limit=2"
// }
// },
// "id": 1,
// "name": "Hello World"
// }
helloWorld = &HelloWorld{ID: 1, Name: "Hello World"}
helloWorld.SetLink("self", "/v1/hello/world/1", "")
// Add embedded resources
foobars := []*Foobar{
&Foobar{
Hal: jsonhal.Hal{
Links: map[string]*jsonhal.Link{
"self": &jsonhal.Link{Href: "/v1/foo/bar/1"},
},
},
ID: 1,
Name: "Foo bar 1",
},
&Foobar{
Hal: jsonhal.Hal{
Links: map[string]*jsonhal.Link{
"self": &jsonhal.Link{Href: "/v1/foo/bar/2"},
},
},
ID: 2,
Name: "Foo bar 2",
},
}
helloWorld.SetEmbedded("foobars", Embedded(foobars))
jsonResponse, err = json.Marshal(helloWorld)
if err != nil {
log.Fatal(err)
}
log.Print(string(jsonResponse))
// {
// "_links": {
// "self": {
// "href": "/v1/hello/world/1"
// }
// },
// "_embedded": {
// "foobars": [
// {
// "_links": {
// "self": {
// "href": "/v1/foo/bar/1"
// }
// },
// "id": 1,
// "name": "Foo bar 1"
// },
// {
// "_links": {
// "self": {
// "href": "/v1/foo/bar/2"
// }
// },
// "id": 2,
// "name": "Foo bar 2"
// }
// ]
// },
// "id": 1,
// "name": "Hello World"
// }
}