Refactor refreshAvatar()

Author: hsluoyz

object/avatar_util.go

@@ -44,6 +44,7 @@ type User struct {
 	FirstName         string   `xorm:"varchar(100)" json:"firstName"`
 	LastName          string   `xorm:"varchar(100)" json:"lastName"`
 	Avatar            string   `xorm:"varchar(500)" json:"avatar"`
+	AvatarType        string   `xorm:"varchar(100)" json:"avatarType"`
 	PermanentAvatar   string   `xorm:"varchar(500)" json:"permanentAvatar"`
 	Email             string   `xorm:"varchar(100) index" json:"email"`
 	EmailVerified     bool     `json:"emailVerified"`

object/user.go

@@ -16,19 +16,78 @@ package object
 
 import (
 	"bytes"
+	"fmt"
+	"io"
+	"net/http"
 	"strings"
 
 	"github.com/casdoor/casdoor/proxy"
 )
 
+func downloadImage(client *http.Client, url string) (*bytes.Buffer, string, error) {
+	// Download the image
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, "", err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		fmt.Printf("downloadImage() error for url [%s]: %s\n", url, err.Error())
+		if strings.Contains(err.Error(), "EOF") {
+			return nil, "", nil
+		} else {
+			return nil, "", err
+		}
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		fmt.Printf("downloadImage() error for url [%s]: %s\n", url, resp.Status)
+		if resp.StatusCode == 404 {
+			return nil, "", nil
+		} else {
+			return nil, "", fmt.Errorf("failed to download gravatar image: %s", resp.Status)
+		}
+	}
+
+	// Get the content type and determine the file extension
+	contentType := resp.Header.Get("Content-Type")
+	fileExtension := ""
+	switch contentType {
+	case "image/jpeg":
+		fileExtension = ".jpg"
+	case "image/png":
+		fileExtension = ".png"
+	case "image/gif":
+		fileExtension = ".gif"
+	case "image/vnd.microsoft.icon":
+		fileExtension = ".ico"
+	case "image/x-icon":
+		fileExtension = ".ico"
+	default:
+		return nil, "", fmt.Errorf("unsupported content type: %s", contentType)
+	}
+
+	// Save the image to a bytes.Buffer
+	buffer := &bytes.Buffer{}
+	_, err = io.Copy(buffer, resp.Body)
+	if err != nil {
+		return nil, "", err
+	}
+
+	return buffer, fileExtension, nil
+}
+
 func (user *User) refreshAvatar() (bool, error) {
 	var err error
 	var fileBuffer *bytes.Buffer
 	var ext string
 
-	// Gravatar + Identicon
-	if strings.Contains(user.Avatar, "Gravatar") && user.Email != "" {
+	// Gravatar
+	if (user.AvatarType == "Auto" || user.AvatarType == "Gravatar") && user.Email != "" {
 		client := proxy.ProxyHttpClient
+
 		has, err := hasGravatar(client, user.Email)
 		if err != nil {
 			return false, err
@@ -39,14 +98,37 @@ func (user *User) refreshAvatar() (bool, error) {
 			if err != nil {
 				return false, err
 			}
+
+			if fileBuffer != nil {
+				user.AvatarType = "Gravatar"
+			}
+		}
+	}
+
+	// Favicon
+	if fileBuffer == nil && (user.AvatarType == "Auto" || user.AvatarType == "Favicon") {
+		client := proxy.ProxyHttpClient
+
+		fileBuffer, ext, err = getFaviconFileBuffer(client, user.Email)
+		if err != nil {
+			return false, err
+		}
+
+		if fileBuffer != nil {
+			user.AvatarType = "Favicon"
 		}
 	}
 
-	if fileBuffer == nil && strings.Contains(user.Avatar, "Identicon") {
+	// Identicon
+	if fileBuffer == nil && (user.AvatarType == "Auto" || user.AvatarType == "Identicon") {
 		fileBuffer, ext, err = getIdenticonFileBuffer(user.Name)
 		if err != nil {
 			return false, err
 		}
+
+		if fileBuffer != nil {
+			user.AvatarType = "Identicon"
+		}
 	}
 
 	if fileBuffer != nil {

object/user_avatar.go

@@ -0,0 +1,36 @@
+// Copyright 2023 The Casdoor 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"
+	"net/http"
+	"strings"
+)
+
+func getFaviconFileBuffer(client *http.Client, email string) (*bytes.Buffer, string, error) {
+	tokens := strings.Split(email, "@")
+	domain := tokens[1]
+	if domain == "gmail.com" || domain == "163.com" || domain == "qq.com" {
+		return nil, "", nil
+	}
+
+	//htmlUrl := fmt.Sprintf("https://%s", domain)
+	//buffer, fileExtension, err := downloadImage(client, htmlUrl)
+
+	faviconUrl := fmt.Sprintf("https://%s/favicon.ico", domain)
+	return downloadImage(client, faviconUrl)
+}