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// Copyright 2020 The Macaron Authors
// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package middleware
import (
"net/http"
"net/url"
"strings"
"code.gitea.io/gitea/modules/session"
"code.gitea.io/gitea/modules/setting"
)
// SetRedirectToCookie convenience function to set the RedirectTo cookie consistently
func SetRedirectToCookie(resp http.ResponseWriter, value string) {
SetSiteCookie(resp, "redirect_to", value, 0)
}
// DeleteRedirectToCookie convenience function to delete most cookies consistently
func DeleteRedirectToCookie(resp http.ResponseWriter) {
SetSiteCookie(resp, "redirect_to", "", -1)
}
// GetSiteCookie returns given cookie value from request header.
func GetSiteCookie(req *http.Request, name string) string {
cookie, err := req.Cookie(name)
if err != nil {
return ""
}
val, _ := url.QueryUnescape(cookie.Value)
return val
}
// SetSiteCookie returns given cookie value from request header.
func SetSiteCookie(resp http.ResponseWriter, name, value string, maxAge int) {
// Previous versions would use a cookie path with a trailing /.
// These are more specific than cookies without a trailing /, so
// we need to delete these if they exist.
deleteLegacySiteCookie(resp, name)
cookie := &http.Cookie{
Name: name,
Value: url.QueryEscape(value),
MaxAge: maxAge,
Path: setting.SessionConfig.CookiePath,
Domain: setting.SessionConfig.Domain,
Secure: setting.SessionConfig.Secure,
HttpOnly: true,
SameSite: setting.SessionConfig.SameSite,
}
resp.Header().Add("Set-Cookie", cookie.String())
}
// deleteLegacySiteCookie deletes the cookie with the given name at the cookie
// path with a trailing /, which would unintentionally override the cookie.
func deleteLegacySiteCookie(resp http.ResponseWriter, name string) {
if setting.SessionConfig.CookiePath == "" || strings.HasSuffix(setting.SessionConfig.CookiePath, "/") {
// If the cookie path ends with /, no legacy cookies will take
// precedence, so do nothing. The exception is that cookies with no
// path could override other cookies, but it's complicated and we don't
// currently handle that.
return
}
cookie := &http.Cookie{
Name: name,
Value: "",
MaxAge: -1,
Path: setting.SessionConfig.CookiePath + "/",
Domain: setting.SessionConfig.Domain,
Secure: setting.SessionConfig.Secure,
HttpOnly: true,
SameSite: setting.SessionConfig.SameSite,
}
resp.Header().Add("Set-Cookie", cookie.String())
}
func init() {
session.BeforeRegenerateSession = append(session.BeforeRegenerateSession, func(resp http.ResponseWriter, _ *http.Request) {
// Ensure that a cookie with a trailing slash does not take precedence over
// the cookie written by the middleware.
deleteLegacySiteCookie(resp, setting.SessionConfig.CookieName)
})
}
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