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author | GitLab Bot <gitlab-bot@gitlab.com> | 2020-12-17 14:59:07 +0300 |
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committer | GitLab Bot <gitlab-bot@gitlab.com> | 2020-12-17 14:59:07 +0300 |
commit | 8b573c94895dc0ac0e1d9d59cf3e8745e8b539ca (patch) | |
tree | 544930fb309b30317ae9797a9683768705d664c4 /workhorse/internal/utils/svg/svg.go | |
parent | 4b1de649d0168371549608993deac953eb692019 (diff) |
Add latest changes from gitlab-org/gitlab@13-7-stable-eev13.7.0-rc42
Diffstat (limited to 'workhorse/internal/utils/svg/svg.go')
-rw-r--r-- | workhorse/internal/utils/svg/svg.go | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/workhorse/internal/utils/svg/svg.go b/workhorse/internal/utils/svg/svg.go new file mode 100644 index 00000000000..b209cb5bf33 --- /dev/null +++ b/workhorse/internal/utils/svg/svg.go @@ -0,0 +1,42 @@ +// Copyright (c) 2016 Tomas Aparicio. All rights reserved. +// +// Use of this source code is governed by a MIT License +// license that can be found in the LICENSE file or at +// https://github.com/h2non/go-is-svg/blob/master/LICENSE. + +package svg + +import ( + "regexp" + "unicode/utf8" +) + +var ( + htmlCommentRegex = regexp.MustCompile(`(?i)<!--([\s\S]*?)-->`) + svgRegex = regexp.MustCompile(`(?i)^\s*(?:<\?xml[^>]*>\s*)?(?:<!doctype svg[^>]*>\s*)?<svg[^>]*>`) +) + +// isBinary checks if the given buffer is a binary file. +func isBinary(buf []byte) bool { + if len(buf) < 24 { + return false + } + for i := 0; i < 24; i++ { + charCode, _ := utf8.DecodeRuneInString(string(buf[i])) + if charCode == 65533 || charCode <= 8 { + return true + } + } + return false +} + +// Is returns true if the given buffer is a valid SVG image. +func Is(buf []byte) bool { + return !isBinary(buf) && svgRegex.Match(htmlCommentRegex.ReplaceAll(buf, []byte{})) +} + +// IsSVG returns true if the given buffer is a valid SVG image. +// Alias to: Is() +func IsSVG(buf []byte) bool { + return Is(buf) +} |