mirror of
https://github.com/go-gitea/gitea
synced 2024-12-25 10:04:27 +00:00
52e11b24bf
* restructure markup & markdown to prepare for multiple markup languages support * adjust some functions between markdown and markup * fix tests * improve the comments
59 lines
1.8 KiB
Go
59 lines
1.8 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
|
|
// Copyright 2017 The Gogs Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package markup
|
|
|
|
import (
|
|
"regexp"
|
|
"sync"
|
|
|
|
"code.gitea.io/gitea/modules/setting"
|
|
|
|
"github.com/microcosm-cc/bluemonday"
|
|
)
|
|
|
|
// Sanitizer is a protection wrapper of *bluemonday.Policy which does not allow
|
|
// any modification to the underlying policies once it's been created.
|
|
type Sanitizer struct {
|
|
policy *bluemonday.Policy
|
|
init sync.Once
|
|
}
|
|
|
|
var sanitizer = &Sanitizer{}
|
|
|
|
// NewSanitizer initializes sanitizer with allowed attributes based on settings.
|
|
// Multiple calls to this function will only create one instance of Sanitizer during
|
|
// entire application lifecycle.
|
|
func NewSanitizer() {
|
|
sanitizer.init.Do(func() {
|
|
sanitizer.policy = bluemonday.UGCPolicy()
|
|
// We only want to allow HighlightJS specific classes for code blocks
|
|
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^language-\w+$`)).OnElements("code")
|
|
|
|
// Checkboxes
|
|
sanitizer.policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
|
|
sanitizer.policy.AllowAttrs("checked", "disabled").OnElements("input")
|
|
|
|
// Custom URL-Schemes
|
|
sanitizer.policy.AllowURLSchemes(setting.Markdown.CustomURLSchemes...)
|
|
})
|
|
}
|
|
|
|
// Sanitize takes a string that contains a HTML fragment or document and applies policy whitelist.
|
|
func Sanitize(s string) string {
|
|
NewSanitizer()
|
|
return sanitizer.policy.Sanitize(s)
|
|
}
|
|
|
|
// SanitizeBytes takes a []byte slice that contains a HTML fragment or document and applies policy whitelist.
|
|
func SanitizeBytes(b []byte) []byte {
|
|
if len(b) == 0 {
|
|
// nothing to sanitize
|
|
return b
|
|
}
|
|
NewSanitizer()
|
|
return sanitizer.policy.SanitizeBytes(b)
|
|
}
|