Mercurial > gemma
view pkg/middleware/notfound.go @ 4725:872787312b6b
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Translation: Gemma/client
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author | Sascha Wilde <wilde@intevation.de> |
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date | Thu, 17 Oct 2019 14:13:39 +0200 |
parents | 6f9d00c8cc38 |
children |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package middleware import ( "errors" "net/http" ) // ErrNotFound should be as the argument to panic if the NotFound should // report back a http.StatusNotFound. var ErrNotFound = errors.New("not found") // NotFound creates an http.Handler which survives panic(ErrNotFound) and // reports http.StatusNotFound in these cases back to the calling handler. func NotFound(next http.Handler) http.Handler { return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) { defer func() { if p := recover(); p != nil { if p == ErrNotFound { http.NotFound(rw, req) } else { panic(p) } } }() next.ServeHTTP(rw, req) }) }