realms support

realms/realms.go

@@ -0,0 +1,88 @@
+package realms
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/cookiejar"
+	"net/url"
+)
+
+type Realms struct {
+	c http.Client
+}
+
+
+type Error struct {
+	ErrorCode int
+	ErrorMsg  string
+}
+
+func (e *Error) Error() string {
+	return fmt.Sprintf("[%d] %s", e.ErrorCode, e.ErrorMsg)
+}
+
+// Domain is the URL of Realms API server
+// Panic if it cannot be parse by url.Parse().
+var Domain = "https://pc.realms.minecraft.net"
+
+// New create a new Realms c with version, username, accessToken and UUID without dashes.
+func New(version, user, astk, uuid string) *Realms {
+	r := &Realms{
+		c: http.Client{},
+	}
+
+	var err error
+	r.c.Jar, err = cookiejar.New(nil)
+	if err != nil {
+		panic(err)
+	}
+
+	d, err := url.Parse(Domain)
+	if err != nil {
+		panic("cannot parse realms.Domain as url: " + err.Error())
+	}
+
+	r.c.Jar.SetCookies(d, []*http.Cookie{
+		{Name: "user", Value: user},
+		{Name: "version", Value: version},
+		{Name: "sid", Value: "token:" + astk + ":" + uuid},
+	})
+
+	return r
+}
+
+func (r *Realms) get(endpoint string, resp interface{}) error {
+	rawResp, err := r.c.Get(Domain + endpoint)
+	if err != nil {
+		return err
+	}
+	defer rawResp.Body.Close()
+
+	err = json.NewDecoder(rawResp.Body).Decode(resp)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (r *Realms) post(endpoint string, payload, resp interface{}) error {
+	data, err := json.Marshal(payload)
+	if err != nil {
+		return err
+	}
+
+	rawResp, err := r.c.Post(Domain+endpoint, "application/json", bytes.NewReader(data))
+	if err != nil {
+		return err
+	}
+
+	err = json.NewDecoder(rawResp.Body).Decode(resp)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}