Avatar refactor, move avatar code from `models` to `models.avatars`, remove duplicated code (#17123)
Why this refactor The goal is to move most files from `models` package to `models.xxx` package. Many models depend on avatar model, so just move this first. And the existing logic is not clear, there are too many function like `AvatarLink`, `RelAvatarLink`, `SizedRelAvatarLink`, `SizedAvatarLink`, `MakeFinalAvatarURL`, `HashedAvatarLink`, etc. This refactor make everything clear: * user.AvatarLink() * user.AvatarLinkWithSize(size) * avatars.GenerateEmailAvatarFastLink(email, size) * avatars.GenerateEmailAvatarFinalLink(email, size) And many duplicated code are deleted in route handler, the handler and the model share the same avatar logic now.release
wxiaoguang
GitHub
parent
48c2578bd8
commit
f0ba87fda8
@ -1,148 +0,0 @@
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// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package models
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import (
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"context"
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"crypto/md5"
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"fmt"
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"net/url"
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"path"
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"strconv"
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"strings"
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"code.gitea.io/gitea/models/db"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/cache"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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)
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// EmailHash represents a pre-generated hash map
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type EmailHash struct {
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Hash string `xorm:"pk varchar(32)"`
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Email string `xorm:"UNIQUE NOT NULL"`
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}
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func init() {
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db.RegisterModel(new(EmailHash))
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}
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// DefaultAvatarLink the default avatar link
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func DefaultAvatarLink() string {
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u, err := url.Parse(setting.AppSubURL)
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if err != nil {
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log.Error("GetUserByEmail: %v", err)
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return ""
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}
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u.Path = path.Join(u.Path, "/assets/img/avatar_default.png")
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return u.String()
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}
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// DefaultAvatarSize is a sentinel value for the default avatar size, as
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// determined by the avatar-hosting service.
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const DefaultAvatarSize = -1
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// DefaultAvatarPixelSize is the default size in pixels of a rendered avatar
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const DefaultAvatarPixelSize = 28
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// AvatarRenderedSizeFactor is the factor by which the default size is increased for finer rendering
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const AvatarRenderedSizeFactor = 4
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// HashEmail hashes email address to MD5 string.
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// https://en.gravatar.com/site/implement/hash/
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func HashEmail(email string) string {
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return base.EncodeMD5(strings.ToLower(strings.TrimSpace(email)))
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}
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// GetEmailForHash converts a provided md5sum to the email
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func GetEmailForHash(md5Sum string) (string, error) {
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return cache.GetString("Avatar:"+md5Sum, func() (string, error) {
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emailHash := EmailHash{
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Hash: strings.ToLower(strings.TrimSpace(md5Sum)),
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}
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_, err := db.GetEngine(db.DefaultContext).Get(&emailHash)
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return emailHash.Email, err
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})
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}
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// LibravatarURL returns the URL for the given email. This function should only
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// be called if a federated avatar service is enabled.
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func LibravatarURL(email string) (*url.URL, error) {
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urlStr, err := setting.LibravatarService.FromEmail(email)
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if err != nil {
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log.Error("LibravatarService.FromEmail(email=%s): error %v", email, err)
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return nil, err
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}
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u, err := url.Parse(urlStr)
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if err != nil {
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log.Error("Failed to parse libravatar url(%s): error %v", urlStr, err)
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return nil, err
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}
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return u, nil
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}
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// HashedAvatarLink returns an avatar link for a provided email
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func HashedAvatarLink(email string, size int) string {
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lowerEmail := strings.ToLower(strings.TrimSpace(email))
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sum := fmt.Sprintf("%x", md5.Sum([]byte(lowerEmail)))
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_, _ = cache.GetString("Avatar:"+sum, func() (string, error) {
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emailHash := &EmailHash{
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Email: lowerEmail,
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Hash: sum,
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}
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// OK we're going to open a session just because I think that that might hide away any problems with postgres reporting errors
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if err := db.WithTx(func(ctx context.Context) error {
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has, err := db.GetEngine(ctx).Where("email = ? AND hash = ?", emailHash.Email, emailHash.Hash).Get(new(EmailHash))
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if has || err != nil {
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// Seriously we don't care about any DB problems just return the lowerEmail - we expect the transaction to fail most of the time
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return nil
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}
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_, _ = db.GetEngine(ctx).Insert(emailHash)
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return nil
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}); err != nil {
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// Seriously we don't care about any DB problems just return the lowerEmail - we expect the transaction to fail most of the time
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return lowerEmail, nil
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}
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return lowerEmail, nil
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})
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if size > 0 {
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return setting.AppSubURL + "/avatar/" + url.PathEscape(sum) + "?size=" + strconv.Itoa(size)
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}
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return setting.AppSubURL + "/avatar/" + url.PathEscape(sum)
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}
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// MakeFinalAvatarURL constructs the final avatar URL string
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func MakeFinalAvatarURL(u *url.URL, size int) string {
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vals := u.Query()
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vals.Set("d", "identicon")
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if size != DefaultAvatarSize {
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vals.Set("s", strconv.Itoa(size))
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}
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u.RawQuery = vals.Encode()
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return u.String()
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}
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// SizedAvatarLink returns a sized link to the avatar for the given email address.
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func SizedAvatarLink(email string, size int) string {
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var avatarURL *url.URL
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if setting.EnableFederatedAvatar && setting.LibravatarService != nil {
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// This is the slow path that would need to call LibravatarURL() which
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// does DNS lookups. Avoid it by issuing a redirect so we don't block
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// the template render with network requests.
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return HashedAvatarLink(email, size)
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} else if !setting.DisableGravatar {
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// copy GravatarSourceURL, because we will modify its Path.
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copyOfGravatarSourceURL := *setting.GravatarSourceURL
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avatarURL = ©OfGravatarSourceURL
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avatarURL.Path = path.Join(avatarURL.Path, HashEmail(email))
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} else {
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return DefaultAvatarLink()
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}
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return MakeFinalAvatarURL(avatarURL, size)
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}
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@ -0,0 +1,180 @@
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// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package avatars
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import (
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"context"
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"net/url"
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"path"
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"strconv"
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"strings"
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"code.gitea.io/gitea/models/db"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/cache"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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)
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// DefaultAvatarPixelSize is the default size in pixels of a rendered avatar
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const DefaultAvatarPixelSize = 28
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// AvatarRenderedSizeFactor is the factor by which the default size is increased for finer rendering
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const AvatarRenderedSizeFactor = 4
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// EmailHash represents a pre-generated hash map (mainly used by LibravatarURL, it queries email server's DNS records)
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type EmailHash struct {
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Hash string `xorm:"pk varchar(32)"`
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Email string `xorm:"UNIQUE NOT NULL"`
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}
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func init() {
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db.RegisterModel(new(EmailHash))
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}
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// DefaultAvatarLink the default avatar link
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func DefaultAvatarLink() string {
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u, err := url.Parse(setting.AppSubURL)
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if err != nil {
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log.Error("GetUserByEmail: %v", err)
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return ""
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}
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u.Path = path.Join(u.Path, "/assets/img/avatar_default.png")
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return u.String()
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}
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// HashEmail hashes email address to MD5 string. https://en.gravatar.com/site/implement/hash/
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func HashEmail(email string) string {
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return base.EncodeMD5(strings.ToLower(strings.TrimSpace(email)))
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}
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// GetEmailForHash converts a provided md5sum to the email
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func GetEmailForHash(md5Sum string) (string, error) {
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return cache.GetString("Avatar:"+md5Sum, func() (string, error) {
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emailHash := EmailHash{
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Hash: strings.ToLower(strings.TrimSpace(md5Sum)),
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}
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_, err := db.GetEngine(db.DefaultContext).Get(&emailHash)
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return emailHash.Email, err
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})
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}
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// LibravatarURL returns the URL for the given email. Slow due to the DNS lookup.
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// This function should only be called if a federated avatar service is enabled.
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func LibravatarURL(email string) (*url.URL, error) {
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urlStr, err := setting.LibravatarService.FromEmail(email)
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if err != nil {
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log.Error("LibravatarService.FromEmail(email=%s): error %v", email, err)
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return nil, err
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}
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u, err := url.Parse(urlStr)
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if err != nil {
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log.Error("Failed to parse libravatar url(%s): error %v", urlStr, err)
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return nil, err
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}
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return u, nil
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}
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// saveEmailHash returns an avatar link for a provided email,
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// the email and hash are saved into database, which will be used by GetEmailForHash later
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func saveEmailHash(email string) string {
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lowerEmail := strings.ToLower(strings.TrimSpace(email))
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emailHash := HashEmail(lowerEmail)
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_, _ = cache.GetString("Avatar:"+emailHash, func() (string, error) {
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emailHash := &EmailHash{
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Email: lowerEmail,
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Hash: emailHash,
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}
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// OK we're going to open a session just because I think that that might hide away any problems with postgres reporting errors
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if err := db.WithTx(func(ctx context.Context) error {
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has, err := db.GetEngine(ctx).Where("email = ? AND hash = ?", emailHash.Email, emailHash.Hash).Get(new(EmailHash))
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if has || err != nil {
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// Seriously we don't care about any DB problems just return the lowerEmail - we expect the transaction to fail most of the time
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return nil
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}
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_, _ = db.GetEngine(ctx).Insert(emailHash)
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return nil
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}); err != nil {
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// Seriously we don't care about any DB problems just return the lowerEmail - we expect the transaction to fail most of the time
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return lowerEmail, nil
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}
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return lowerEmail, nil
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})
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return emailHash
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}
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// GenerateUserAvatarFastLink returns a fast link (302) to the user's avatar: "/user/avatar/${User.Name}/${size}"
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func GenerateUserAvatarFastLink(userName string, size int) string {
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if size < 0 {
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size = 0
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}
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return setting.AppSubURL + "/user/avatar/" + userName + "/" + strconv.Itoa(size)
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}
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// GenerateUserAvatarImageLink returns a link for `User.Avatar` image file: "/avatars/${User.Avatar}"
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func GenerateUserAvatarImageLink(userAvatar string, size int) string {
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if size > 0 {
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return setting.AppSubURL + "/avatars/" + userAvatar + "?size=" + strconv.Itoa(size)
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}
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return setting.AppSubURL + "/avatars/" + userAvatar
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}
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// generateRecognizedAvatarURL generate a recognized avatar (Gravatar/Libravatar) URL, it modifies the URL so the parameter is passed by a copy
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func generateRecognizedAvatarURL(u url.URL, size int) string {
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urlQuery := u.Query()
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urlQuery.Set("d", "identicon")
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if size > 0 {
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urlQuery.Set("s", strconv.Itoa(size))
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}
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u.RawQuery = urlQuery.Encode()
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return u.String()
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}
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// generateEmailAvatarLink returns a email avatar link.
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// if final is true, it may use a slow path (eg: query DNS).
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// if final is false, it always uses a fast path.
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func generateEmailAvatarLink(email string, size int, final bool) string {
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email = strings.TrimSpace(email)
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if email == "" {
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return DefaultAvatarLink()
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}
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var err error
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if setting.EnableFederatedAvatar && setting.LibravatarService != nil {
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emailHash := saveEmailHash(email)
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if final {
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// for final link, we can spend more time on slow external query
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var avatarURL *url.URL
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if avatarURL, err = LibravatarURL(email); err != nil {
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return DefaultAvatarLink()
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}
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return generateRecognizedAvatarURL(*avatarURL, size)
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}
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// for non-final link, we should return fast (use a 302 redirection link)
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urlStr := setting.AppSubURL + "/avatar/" + emailHash
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if size > 0 {
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urlStr += "?size=" + strconv.Itoa(size)
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}
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return urlStr
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} else if !setting.DisableGravatar {
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// copy GravatarSourceURL, because we will modify its Path.
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avatarURLCopy := *setting.GravatarSourceURL
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avatarURLCopy.Path = path.Join(avatarURLCopy.Path, HashEmail(email))
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return generateRecognizedAvatarURL(avatarURLCopy, size)
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}
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return DefaultAvatarLink()
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}
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//GenerateEmailAvatarFastLink returns a avatar link (fast, the link may be a delegated one: "/avatar/${hash}")
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func GenerateEmailAvatarFastLink(email string, size int) string {
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return generateEmailAvatarLink(email, size, false)
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}
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//GenerateEmailAvatarFinalLink returns a avatar final link (maybe slow)
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func GenerateEmailAvatarFinalLink(email string, size int) string {
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return generateEmailAvatarLink(email, size, true)
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}
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