Add function to fetch license info (minio#315)

license.go

@@ -0,0 +1,63 @@
+//
+// Copyright (c) 2015-2024 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+
+package madmin
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"time"
+)
+
+// LicenseInfo is a structure containing MinIO license information.
+type LicenseInfo struct {
+	ID           string    `json:"ID"`           // The license ID
+	Organization string    `json:"Organization"` // Name of the organization using the license
+	Plan         string    `json:"Plan"`         // License plan. E.g. "ENTERPRISE-PLUS"
+	IssuedAt     time.Time `json:"IssuedAt"`     // Point in time when the license was issued
+	ExpiresAt    time.Time `json:"ExpiresAt"`    // Point in time when the license expires
+	Trial        bool      `json:"Trial"`        // Whether the license is on trial
+	APIKey       string    `json:"APIKey"`       // Subnet account API Key
+}
+
+// GetLicenseInfo - returns the license info
+func (adm *AdminClient) GetLicenseInfo(ctx context.Context) (*LicenseInfo, error) {
+	// Execute GET on /minio/admin/v3/licenseinfo to get license info.
+	resp, err := adm.executeMethod(ctx,
+		http.MethodGet,
+		requestData{
+			relPath: adminAPIPrefix + "/license-info",
+		})
+	defer closeResponse(resp)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, httpRespToErrorResponse(resp)
+	}
+
+	l := LicenseInfo{}
+	err = json.NewDecoder(resp.Body).Decode(&l)
+	if err != nil {
+		return nil, err
+	}
+	return &l, nil
+}