Add PermanentAvatar to user.

object/avatar.go

@@ -0,0 +1,72 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package object
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+
+	"github.com/astaxie/beego"
+	"github.com/casbin/casdoor/proxy"
+)
+
+var defaultStorageProvider *Provider = nil
+
+func InitDefaultStorageProvider() {
+	 defaultStorageProviderStr := beego.AppConfig.String("defaultStorageProvider")
+	if defaultStorageProviderStr != "" {
+		defaultStorageProvider = getProvider("admin", defaultStorageProviderStr)
+	}
+}
+
+func downloadFile(url string) (*bytes.Buffer, error) {
+	httpClient := proxy.GetHttpClient(url)
+
+	resp, err := httpClient.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	fileBuffer := bytes.NewBuffer(nil)
+	_, err = io.Copy(fileBuffer, resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	return fileBuffer, nil
+}
+
+func getPermanentAvatarUrl(organization string, username string, url string) string {
+	if defaultStorageProvider == nil {
+		return ""
+	}
+
+	fullFilePath := fmt.Sprintf("/avatar/%s/%s.png", organization, username)
+	uploadedFileUrl, _ := getUploadFileUrl(defaultStorageProvider, fullFilePath, false)
+
+	fileBuffer, err := downloadFile(url)
+	if err != nil {
+		panic(err)
+	}
+
+	_, _, err = UploadFile(defaultStorageProvider, fullFilePath, fileBuffer)
+	if err != nil {
+		panic(err)
+	}
+
+	return uploadedFileUrl
+}