129 lines
3.7 KiB
Go
129 lines
3.7 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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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 License 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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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 License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package router
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import (
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"context"
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"crypto/rand"
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"fmt"
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"net/http"
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"os"
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"path/filepath"
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"github.com/gin-contrib/sessions"
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"github.com/gin-contrib/sessions/memstore"
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"github.com/gin-gonic/gin"
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"github.com/sirupsen/logrus"
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"github.com/superseriousbusiness/gotosocial/internal/config"
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)
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// Router provides the REST interface for gotosocial, using gin.
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type Router interface {
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// Attach a gin handler to the router with the given method and path
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AttachHandler(method string, path string, f gin.HandlerFunc)
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// Attach a gin middleware to the router that will be used globally
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AttachMiddleware(handler gin.HandlerFunc)
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// Start the router
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Start()
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// Stop the router
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Stop(ctx context.Context) error
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}
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// router fulfils the Router interface using gin and logrus
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type router struct {
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logger *logrus.Logger
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engine *gin.Engine
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srv *http.Server
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}
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// Start starts the router nicely
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func (r *router) Start() {
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go func() {
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if err := r.srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
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r.logger.Fatalf("listen: %s", err)
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}
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}()
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}
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// Stop shuts down the router nicely
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func (r *router) Stop(ctx context.Context) error {
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return r.srv.Shutdown(ctx)
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}
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// AttachHandler attaches the given gin.HandlerFunc to the router with the specified method and path.
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// If the path is set to ANY, then the handlerfunc will be used for ALL methods at its given path.
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func (r *router) AttachHandler(method string, path string, handler gin.HandlerFunc) {
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if method == "ANY" {
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r.engine.Any(path, handler)
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} else {
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r.engine.Handle(method, path, handler)
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}
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}
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// AttachMiddleware attaches a gin middleware to the router that will be used globally
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func (r *router) AttachMiddleware(middleware gin.HandlerFunc) {
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r.engine.Use(middleware)
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}
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// New returns a new Router with the specified configuration, using the given logrus logger.
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func New(config *config.Config, logger *logrus.Logger) (Router, error) {
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engine := gin.New()
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// create a new session store middleware
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store, err := sessionStore()
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if err != nil {
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return nil, fmt.Errorf("error creating session store: %s", err)
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}
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engine.Use(sessions.Sessions("gotosocial-session", store))
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// load html templates for use by the router
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cwd, err := os.Getwd()
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if err != nil {
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return nil, fmt.Errorf("error getting current working directory: %s", err)
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}
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tmPath := filepath.Join(cwd, fmt.Sprintf("%s*", config.TemplateConfig.BaseDir))
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logger.Debugf("loading templates from %s", tmPath)
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engine.LoadHTMLGlob(tmPath)
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return &router{
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logger: logger,
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engine: engine,
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srv: &http.Server{
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Addr: ":8080",
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Handler: engine,
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},
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}, nil
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}
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// sessionStore returns a new session store with a random auth and encryption key.
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// This means that cookies using the store will be reset if gotosocial is restarted!
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func sessionStore() (memstore.Store, error) {
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auth := make([]byte, 32)
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crypt := make([]byte, 32)
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if _, err := rand.Read(auth); err != nil {
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return nil, err
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}
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if _, err := rand.Read(crypt); err != nil {
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return nil, err
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}
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return memstore.NewStore(auth, crypt), nil
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}
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