2d0b90c967
* fix upload file type check * make the function simple and added tests * Update comment as per @silverwind
46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package upload
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import (
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"fmt"
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"net/http"
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"strings"
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"code.gitea.io/gitea/modules/log"
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)
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// ErrFileTypeForbidden not allowed file type error
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type ErrFileTypeForbidden struct {
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Type string
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}
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// IsErrFileTypeForbidden checks if an error is a ErrFileTypeForbidden.
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func IsErrFileTypeForbidden(err error) bool {
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_, ok := err.(ErrFileTypeForbidden)
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return ok
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}
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func (err ErrFileTypeForbidden) Error() string {
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return fmt.Sprintf("File type is not allowed: %s", err.Type)
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}
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// VerifyAllowedContentType validates a file is allowed to be uploaded.
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func VerifyAllowedContentType(buf []byte, allowedTypes []string) error {
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fileType := http.DetectContentType(buf)
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for _, t := range allowedTypes {
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t := strings.Trim(t, " ")
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if t == "*/*" || t == fileType ||
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// Allow directives after type, like 'text/plain; charset=utf-8'
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strings.HasPrefix(fileType, t+";") {
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return nil
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}
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}
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log.Info("Attachment with type %s blocked from upload", fileType)
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return ErrFileTypeForbidden{Type: fileType}
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}
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