dnote/pkg/server/middleware/middleware.go
2023-02-05 11:02:25 +11:00

94 lines
2.4 KiB
Go

/* Copyright (C) 2019, 2020, 2021, 2022, 2023 Monomax Software Pty Ltd
*
* This file is part of Dnote.
*
* Dnote 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.
*
* Dnote 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 Dnote. If not, see <https://www.gnu.org/licenses/>.
*/
package middleware
import (
"net/http"
"net/url"
"github.com/dnote/dnote/pkg/server/app"
"github.com/gorilla/schema"
)
// Middleware is a middleware for request handlers
type Middleware func(h http.Handler, app *app.App, rateLimit bool) http.Handler
type payload struct {
Method string `schema:"_method"`
}
func parseValues(values url.Values, dst interface{}) error {
dec := schema.NewDecoder()
// Ignore CSRF token field
dec.IgnoreUnknownKeys(true)
if err := dec.Decode(dst, values); err != nil {
return err
}
return nil
}
// methodOverrideKey is the form key for overriding the method
var methodOverrideKey = "_method"
// methodOverride overrides the request's method to simulate form actions that
// are not natively supported by web browsers
func methodOverride(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodPost {
method := r.PostFormValue(methodOverrideKey)
if method == http.MethodPut || method == http.MethodPatch || method == http.MethodDelete {
r.Method = method
}
}
next.ServeHTTP(w, r)
})
}
// WebMw is the middleware for the web
func WebMw(h http.Handler, app *app.App, rateLimit bool) http.Handler {
ret := h
ret = ApplyLimit(ret.ServeHTTP, rateLimit)
return ret
}
// APIMw is the middleware for the API
func APIMw(h http.Handler, app *app.App, rateLimit bool) http.Handler {
ret := h
ret = ApplyLimit(ret.ServeHTTP, rateLimit)
return ret
}
// Global is the middleware for all routes
func Global(h http.Handler) http.Handler {
ret := h
ret = Logging(ret)
ret = methodOverride(ret)
return ret
}