Merge #206

yggdrasil/user/user.go

@@ -0,0 +1,61 @@
+package user
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+var ServicesURL = "https://api.minecraftservices.com"
+
+var client = http.DefaultClient
+
+type KeyPairResp struct {
+	KeyPair struct {
+		PrivateKey string `json:"privateKey"`
+		PublicKey  string `json:"publicKey"`
+	} `json:"keyPair"`
+	PublicKeySignature string    `json:"publicKeySignature"`
+	ExpiresAt          time.Time `json:"expiresAt"`
+	RefreshedAfter     time.Time `json:"refreshedAfter"`
+}
+
+func GetOrFetchKeyPair(accessToken string) (KeyPairResp, error) {
+	return fetchKeyPair(accessToken) // TODO: cache
+}
+
+func fetchKeyPair(accessToken string) (KeyPairResp, error) {
+	var keyPairResp KeyPairResp
+	err := post("/player/certificates", accessToken, &keyPairResp)
+	return keyPairResp, err
+}
+
+func post(endpoint string, accessToken string, resp interface{}) error {
+	rowResp, err := rawPost(endpoint, accessToken)
+	if err != nil {
+		return fmt.Errorf("request fail: %v", err)
+	}
+	defer rowResp.Body.Close()
+	err = json.NewDecoder(rowResp.Body).Decode(resp)
+	if err != nil {
+		return fmt.Errorf("parse resp fail: %v", err)
+	}
+
+	return nil
+}
+
+func rawPost(endpoint string, accessToken string) (*http.Response, error) {
+	PostRequest, err := http.NewRequest(
+		http.MethodPost,
+		ServicesURL+endpoint, nil)
+	if err != nil {
+		return nil, fmt.Errorf("make request error: %v", err)
+	}
+
+	PostRequest.Header.Set("Authorization", "Bearer "+accessToken)
+	PostRequest.Header.Set("Content-Type", "application/json; charset=utf-8")
+
+	// Do
+	return client.Do(PostRequest)
+}