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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 (
"fmt"
"io/ioutil"
"net/http"
"path/filepath"
"strings"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/api"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/processing"
"github.com/superseriousbusiness/gotosocial/internal/router"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
const (
confirmEmailPath = "/" + uris.ConfirmEmailPath
tokenParam = "token"
usernameKey = "username"
statusIDKey = "status"
profilePath = "/@:" + usernameKey
statusPath = profilePath + "/statuses/:" + statusIDKey
)
// Module implements the api.ClientModule interface for web pages.
type Module struct {
processor processing.Processor
assetsPath string
adminPath string
defaultAvatars []string
}
// New returns a new api.ClientModule for web pages.
func New(processor processing.Processor) (api.ClientModule, error) {
assetsBaseDir := config.GetWebAssetBaseDir()
if assetsBaseDir == "" {
return nil, fmt.Errorf("%s cannot be empty and must be a relative or absolute path", config.WebAssetBaseDirFlag())
}
assetsPath, err := filepath.Abs(assetsBaseDir)
if err != nil {
return nil, fmt.Errorf("error getting absolute path of %s: %s", assetsBaseDir, err)
}
defaultAvatarsPath := filepath.Join(assetsPath, "default_avatars")
defaultAvatarFiles, err := ioutil.ReadDir(defaultAvatarsPath)
if err != nil {
return nil, fmt.Errorf("error reading default avatars at %s: %s", defaultAvatarsPath, err)
}
defaultAvatars := []string{}
for _, f := range defaultAvatarFiles {
// ignore directories
if f.IsDir() {
continue
}
// ignore files bigger than 50kb
if f.Size() > 50000 {
continue
}
extension := strings.TrimPrefix(strings.ToLower(filepath.Ext(f.Name())), ".")
// take only files with simple extensions
switch extension {
case "svg", "jpeg", "jpg", "gif", "png":
defaultAvatarPath := fmt.Sprintf("/assets/default_avatars/%s", f.Name())
defaultAvatars = append(defaultAvatars, defaultAvatarPath)
default:
continue
}
}
return &Module{
processor: processor,
assetsPath: assetsPath,
adminPath: filepath.Join(assetsPath, "admin"),
defaultAvatars: defaultAvatars,
}, nil
}
func (m *Module) baseHandler(c *gin.Context) {
l := logrus.WithField("func", "BaseGETHandler")
l.Trace("serving index html")
host := config.GetHost()
instance, err := m.processor.InstanceGet(c.Request.Context(), host)
if err != nil {
l.Debugf("error getting instance from processor: %s", err)
c.JSON(http.StatusInternalServerError, gin.H{"error": "internal server error"})
return
}
c.HTML(http.StatusOK, "index.tmpl", gin.H{
"instance": instance,
})
}
// NotFoundHandler serves a 404 html page instead of a blank 404 error.
func (m *Module) NotFoundHandler(c *gin.Context) {
l := logrus.WithField("func", "404")
l.Trace("serving 404 html")
host := config.GetHost()
instance, err := m.processor.InstanceGet(c.Request.Context(), host)
if err != nil {
l.Debugf("error getting instance from processor: %s", err)
c.JSON(http.StatusInternalServerError, gin.H{"error": "internal server error"})
return
}
c.HTML(404, "404.tmpl", gin.H{
"instance": instance,
})
}
// Route satisfies the RESTAPIModule interface
func (m *Module) Route(s router.Router) error {
// serve static files from assets dir at /assets
s.AttachStaticFS("/assets", fileSystem{http.Dir(m.assetsPath)})
// serve admin panel from within assets dir at /admin/
// and redirect /admin to /admin/
s.AttachStaticFS("/admin/", fileSystem{http.Dir(m.adminPath)})
s.AttachHandler(http.MethodGet, "/admin", func(c *gin.Context) {
c.Redirect(http.StatusMovedPermanently, "/admin/")
})
// serve front-page
s.AttachHandler(http.MethodGet, "/", m.baseHandler)
// serve profile pages at /@username
s.AttachHandler(http.MethodGet, profilePath, m.profileTemplateHandler)
// serve statuses
s.AttachHandler(http.MethodGet, statusPath, m.threadTemplateHandler)
// serve email confirmation page at /confirm_email?token=whatever
s.AttachHandler(http.MethodGet, confirmEmailPath, m.confirmEmailGETHandler)
// 404 handler
s.AttachNoRouteHandler(m.NotFoundHandler)
return nil
}
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