forked from vikunja/vikunja
88 lines
2.7 KiB
Go
88 lines
2.7 KiB
Go
// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-2021 Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public Licensee as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public Licensee for more details.
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//
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// You should have received a copy of the GNU Affero General Public Licensee
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package gravatar
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import (
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"context"
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"io"
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"net/http"
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"strconv"
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"strings"
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"time"
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"code.vikunja.io/api/pkg/config"
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"code.vikunja.io/api/pkg/log"
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"code.vikunja.io/api/pkg/user"
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"code.vikunja.io/api/pkg/utils"
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)
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type avatar struct {
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content []byte
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loadedAt time.Time
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}
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// Provider is the gravatar provider
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type Provider struct {
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}
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// avatars is a global map which contains cached avatars of the users
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var avatars map[string]*avatar
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func init() {
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avatars = make(map[string]*avatar)
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}
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// GetAvatar implements getting the avatar for the user
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func (g *Provider) GetAvatar(user *user.User, size int64) ([]byte, string, error) {
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sizeString := strconv.FormatInt(size, 10)
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cacheKey := user.Username + "_" + sizeString
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a, exists := avatars[cacheKey]
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var needsRefetch bool
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if exists {
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// elaped is alway < 0 so the next check would always succeed.
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// To have it make sense, we flip that.
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elapsed := time.Until(a.loadedAt) * -1
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needsRefetch = elapsed > time.Duration(config.AvatarGravaterExpiration.GetInt64())*time.Second
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if needsRefetch {
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log.Debugf("Refetching avatar for user %d after %v", user.ID, elapsed)
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} else {
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log.Debugf("Serving avatar for user %d from cache", user.ID)
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}
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}
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if !exists || needsRefetch {
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log.Debugf("Gravatar for user %d with size %d not cached, requesting from gravatar...", user.ID, size)
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req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, "https://www.gravatar.com/avatar/"+utils.Md5String(strings.ToLower(user.Email))+"?s="+sizeString+"&d=mp", nil)
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if err != nil {
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return nil, "", err
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}
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return nil, "", err
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}
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defer resp.Body.Close()
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avatarContent, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, "", err
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}
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avatars[cacheKey] = &avatar{
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content: avatarContent,
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loadedAt: time.Now(),
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}
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}
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return avatars[cacheKey].content, "image/jpg", nil
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}
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