Related methods:

func (r *Response) WriteJson(content interface{}) error
func (r *Response) WriteJsonExit(content interface{}) error
func (r *Response) WriteJsonP(content interface{}) error
func (r *Response) WriteJsonPExit(content interface{}) error
func (r *Response) WriteXml(content interface{}, rootTag ...string) error
func (r *Response) WriteXmlExit(content interface{}, rootTag ...string) error

Response provides native support for JSON/XML data format output, implemented through the following methods:

1. WriteJson* methods are used to return JSON data format, with parameters of any type, such as string, map, struct, etc. The returned Content-Type is application/json.
2. WriteXml* methods are used to return XML data format, with parameters of any type, such as string, map, struct, etc. The returned Content-Type is application/xml.

tip

While supporting the JSON data format, it also supports the JSONP protocol.

JSON

package main
import (
    "github.com/gogf/gf/v2/frame/g"
    "github.com/gogf/gf/v2/net/ghttp"
)
func main() {
    s := g.Server()
    s.Group("/", func(group *ghttp.RouterGroup) {
        group.ALL("/json", func(r *ghttp.Request) {
            r.Response.WriteJson(g.Map{
                "id":   1,
                "name": "john",
            })
        })
    })
    s.SetPort(8199)
    s.Run()
}

After execution, we test it using the curl tool:

$ curl -i http://127.0.0.1:8199/json
HTTP/1.1 200 OK
Content-Type: application/json
Server: GoFrame HTTP Server
Date: Sun, 05 Jan 2020 02:49:31 GMT
Content-Length: 22
{"id":1,"name":"john"}

JSONP

Note that when using the JSONP protocol, you must provide the callback parameter via Query.

package main
import (
    "github.com/gogf/gf/v2/frame/g"
    "github.com/gogf/gf/v2/net/ghttp"
)
func main() {
    s := g.Server()
    s.Group("/", func(group *ghttp.RouterGroup) {
        group.ALL("/jsonp", func(r *ghttp.Request) {
            r.Response.WriteJsonP(g.Map{
                "id":   1,
                "name": "john",
            })
        })
    })
    s.SetPort(8199)
    s.Run()
}

After execution, we test it using the curl tool:

$ curl -i "http://127.0.0.1:8199/jsonp?callback=MyCallback"
HTTP/1.1 200 OK
Server: GoFrame HTTP Server
Date: Sun, 05 Jan 2020 02:50:42 GMT
Content-Length: 34
Content-Type: text/plain; charset=utf-8
MyCallback({"id":1,"name":"john"})

XML

package main
import (
    "github.com/gogf/gf/v2/frame/g"
    "github.com/gogf/gf/v2/net/ghttp"
)
func main() {
    s := g.Server()
    s.Group("/", func(group *ghttp.RouterGroup) {
        group.ALL("/xml", func(r *ghttp.Request) {
            r.Response.Write(`<?xml version="1.0" encoding="UTF-8"?>`)
            r.Response.WriteXml(g.Map{
                "id":   1,
                "name": "john",
            })
        })
    })
    s.SetPort(8199)
    s.Run()
}

After execution, we test it using the curl tool:

$ curl -i http://127.0.0.1:8199/xml
HTTP/1.1 200 OK
Content-Type: application/xml
Server: GoFrame HTTP Server
Date: Sun, 05 Jan 2020 03:00:55 GMT
Content-Length: 76
<?xml version="1.0" encoding="UTF-8"?><doc><id>1</id><name>john</name></doc>