Mercurial > gemma

annotate pkg/middleware/notfound.go @ 5688:6281c18b109f sr-v2

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Finsh serializing v2 meshes.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 12 Feb 2024 02:27:41 +0100
parents 6f9d00c8cc38
children
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2018 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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14 package middleware
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15
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16 import (
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17 "errors"
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18 "net/http"
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19 )
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20
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21 // ErrNotFound should be as the argument to panic if the NotFound should
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22 // report back a http.StatusNotFound.
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23 var ErrNotFound = errors.New("not found")
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24
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25 // NotFound creates an http.Handler which survives panic(ErrNotFound) and
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26 // reports http.StatusNotFound in these cases back to the calling handler.
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27 func NotFound(next http.Handler) http.Handler {
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28 return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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29 defer func() {
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30 if p := recover(); p != nil {
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31 if p == ErrNotFound {
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32 http.NotFound(rw, req)
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33 } else {
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34 panic(p)
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35 }
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36 }
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37 }()
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38 next.ServeHTTP(rw, req)
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39 })
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40 }