Mercurial > gemma
view pkg/misc/http.go @ 5652:9b3779f649c2 v5.7.1
Bumped version for release.
author | Sascha Wilde <wilde@sha-bang.de> |
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date | Mon, 07 Aug 2023 17:59:18 +0200 |
parents | 1222b777f51f |
children | 31973f6f5cca |
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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 misc import ( "bufio" "fmt" "io" "io/ioutil" "net/http" "os" "path/filepath" "gemma.intevation.de/gemma/pkg/config" ) // StoreUploadedFile stores a file upload file from // a given HTTP request identified by a given field name // in a file with a path build by the config.TmpDir and // the given file name. // If the file is long than the given limit maxSize // this function returns an error. func StoreUploadedFile( req *http.Request, field, fname string, maxSize int64) (string, error) { return StoreUploadedFileCheck(req, field, fname, maxSize, false) } // StoreUploadedFileCheck does the same as StoreUploadedFile // with the optional check if the upload is too large or not. func StoreUploadedFileCheck( req *http.Request, field, fname string, maxSize int64, errorOverMax bool, ) (string, error) { // Check for direct upload. f, _, err := req.FormFile(field) if err != nil { return "", err } defer f.Close() dir, err := ioutil.TempDir(config.TmpDir(), field) if err != nil { return "", err } o, err := os.Create(filepath.Join(dir, fname)) if err != nil { os.RemoveAll(dir) return "", err } out := bufio.NewWriter(o) // Little trick to check if we are over the limit. size := maxSize if errorOverMax { size++ } cleanup := func() { o.Close() os.RemoveAll(dir) } r, err := io.Copy(out, io.LimitReader(f, size)) if err != nil { cleanup() return "", err } if errorOverMax && r > maxSize { cleanup() return "", fmt.Errorf("upload exceeded limit of %d bytes", maxSize) } if err = out.Flush(); err != nil { cleanup() return "", err } if err := o.Close(); err != nil { os.RemoveAll(dir) return "", err } return dir, nil }