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https://github.com/superseriousbusiness/gotosocial.git
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d16e4fa34d* [feature] Use maintenance router to serve 503 while server is starting/migrating * love you linter, kissies
70 lines
2.3 KiB
Go
70 lines
2.3 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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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 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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//
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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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//
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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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package web
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import (
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"net/http"
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"time"
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"codeberg.org/gruf/go-cache/v3"
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"github.com/gin-gonic/gin"
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"github.com/superseriousbusiness/gotosocial/internal/api/health"
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"github.com/superseriousbusiness/gotosocial/internal/config"
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"github.com/superseriousbusiness/gotosocial/internal/router"
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)
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type MaintenanceModule struct {
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eTagCache cache.Cache[string, eTagCacheEntry]
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}
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// NewMaintenance returns a module that routes only
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// static assets, and returns a code 503 maintenance
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// message template to all other requests.
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func NewMaintenance() *MaintenanceModule {
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return &MaintenanceModule{
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eTagCache: newETagCache(),
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}
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}
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// ETagCache implements withETagCache.
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func (m *MaintenanceModule) ETagCache() cache.Cache[string, eTagCacheEntry] {
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return m.eTagCache
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}
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func (m *MaintenanceModule) Route(r *router.Router, mi ...gin.HandlerFunc) {
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// Route static assets.
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routeAssets(m, r, mi...)
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// Serve OK in response to live
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// requests, but not ready requests.
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liveHandler := func(c *gin.Context) {
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c.Status(http.StatusOK)
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}
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r.AttachHandler(http.MethodGet, health.LivePath, liveHandler)
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r.AttachHandler(http.MethodHead, health.LivePath, liveHandler)
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// For everything else, serve maintenance template.
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obj := map[string]string{"host": config.GetHost()}
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r.AttachNoRouteHandler(func(c *gin.Context) {
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retryAfter := time.Now().Add(120 * time.Second).UTC()
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c.Writer.Header().Add("Retry-After", "120")
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c.Writer.Header().Add("Retry-After", retryAfter.Format(http.TimeFormat))
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c.Header("Cache-Control", "no-store")
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c.HTML(http.StatusServiceUnavailable, "maintenance.tmpl", obj)
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})
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}
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