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31 lines
1.1 KiB
Go
31 lines
1.1 KiB
Go
// This file is Free Software under the Apache-2.0 License
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// without warranty, see README.md and LICENSES/Apache-2.0.txt for details.
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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// SPDX-FileCopyrightText: 2023 German Federal Office for Information Security (BSI) <https://www.bsi.bund.de>
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// Software-Engineering: 2023 Intevation GmbH <https://intevation.de>
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package misc //revive:disable-line:var-naming
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import (
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"fmt"
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"io"
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"mime/multipart"
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"net/textproto"
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"strings"
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)
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var escapeQuotes = strings.NewReplacer("\\", "\\\\", `"`, "\\\"").Replace
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// CreateFormFile creates an [io.Writer] like [mime/multipart.Writer.CreateFromFile].
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// This version allows to set the mime type, too.
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func CreateFormFile(w *multipart.Writer, fieldname, filename, mimeType string) (io.Writer, error) {
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// Source: https://cs.opensource.google/go/go/+/refs/tags/go1.20:src/mime/multipart/writer.go;l=140
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h := make(textproto.MIMEHeader)
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h.Set("Content-Disposition",
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fmt.Sprintf(`form-data; name="%s"; filename="%s"`,
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escapeQuotes(fieldname), escapeQuotes(filename)))
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h.Set("Content-Type", mimeType)
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return w.CreatePart(h)
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}
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