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/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
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 web
import (
"errors"
"fmt"
"io/ioutil"
"net/http"
"path/filepath"
"strings"
"time"
"codeberg.org/gruf/go-cache/v2"
"github.com/gin-gonic/gin"
"github.com/superseriousbusiness/gotosocial/internal/api"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/processing"
"github.com/superseriousbusiness/gotosocial/internal/router"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
const (
confirmEmailPath = "/" + uris.ConfirmEmailPath
profilePath = "/@:" + usernameKey
statusPath = profilePath + "/statuses/:" + statusIDKey
adminPanelPath = "/admin"
userPanelpath = "/user"
assetsPath = "/assets"
tokenParam = "token"
usernameKey = "username"
statusIDKey = "status"
)
// Module implements the api.ClientModule interface for web pages.
type Module struct {
processor processing.Processor
webAssetsAbsFilePath string
assetsETagCache cache.Cache[string, eTagCacheEntry]
defaultAvatars []string
}
// New returns a new api.ClientModule for web pages.
func New(processor processing.Processor) (api.ClientModule, error) {
webAssetsBaseDir := config.GetWebAssetBaseDir()
if webAssetsBaseDir == "" {
return nil, fmt.Errorf("%s cannot be empty and must be a relative or absolute path", config.WebAssetBaseDirFlag())
}
webAssetsAbsFilePath, err := filepath.Abs(webAssetsBaseDir)
if err != nil {
return nil, fmt.Errorf("error getting absolute path of %s: %s", webAssetsBaseDir, err)
}
defaultAvatarsAbsFilePath := filepath.Join(webAssetsAbsFilePath, "default_avatars")
defaultAvatarFiles, err := ioutil.ReadDir(defaultAvatarsAbsFilePath)
if err != nil {
return nil, fmt.Errorf("error reading default avatars at %s: %s", defaultAvatarsAbsFilePath, err)
}
defaultAvatars := []string{}
for _, f := range defaultAvatarFiles {
// ignore directories
if f.IsDir() {
continue
}
// ignore files bigger than 50kb
if f.Size() > 50000 {
continue
}
// get the name of the file, eg avatar.jpeg
fileName := f.Name()
// get just the .jpeg, for example, from avatar.jpeg
extensionWithDot := filepath.Ext(fileName)
// remove the leading . to just get, eg, jpeg
extension := strings.TrimPrefix(extensionWithDot, ".")
// take only files with simple extensions
// that we know will work OK as avatars
switch strings.ToLower(extension) {
case "svg", "jpeg", "jpg", "gif", "png":
avatar := fmt.Sprintf("%s/default_avatars/%s", assetsPath, f.Name())
defaultAvatars = append(defaultAvatars, avatar)
default:
continue
}
}
assetsETagCache := cache.New[string, eTagCacheEntry]()
assetsETagCache.SetTTL(time.Hour, false)
assetsETagCache.Start(time.Minute)
return &Module{
processor: processor,
webAssetsAbsFilePath: webAssetsAbsFilePath,
assetsETagCache: assetsETagCache,
defaultAvatars: defaultAvatars,
}, nil
}
// Route satisfies the RESTAPIModule interface
func (m *Module) Route(s router.Router) error {
// serve static files from assets dir at /assets
assetsGroup := s.AttachGroup(assetsPath)
m.mountAssetsFilesystem(assetsGroup)
s.AttachHandler(http.MethodGet, adminPanelPath, m.AdminPanelHandler)
// redirect /admin/ to /admin
s.AttachHandler(http.MethodGet, adminPanelPath+"/", func(c *gin.Context) {
c.Redirect(http.StatusMovedPermanently, adminPanelPath)
})
s.AttachHandler(http.MethodGet, userPanelpath, m.UserPanelHandler)
// redirect /settings/ to /settings
s.AttachHandler(http.MethodGet, userPanelpath+"/", func(c *gin.Context) {
c.Redirect(http.StatusMovedPermanently, userPanelpath)
})
// serve front-page
s.AttachHandler(http.MethodGet, "/", m.baseHandler)
// serve profile pages at /@username
s.AttachHandler(http.MethodGet, profilePath, m.profileGETHandler)
// serve statuses
s.AttachHandler(http.MethodGet, statusPath, m.threadGETHandler)
// serve email confirmation page at /confirm_email?token=whatever
s.AttachHandler(http.MethodGet, confirmEmailPath, m.confirmEmailGETHandler)
// 404 handler
s.AttachNoRouteHandler(func(c *gin.Context) {
api.ErrorHandler(c, gtserror.NewErrorNotFound(errors.New(http.StatusText(http.StatusNotFound))), m.processor.InstanceGet)
})
return nil
}
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