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Refactor markup render system (#32533)

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Remove unmaintainable sanitizer rules. No need to add special "class"
regexp rules anymore, use RenderInternal.SafeAttr instead, more details
(and examples) are in the tests
This commit is contained in:
wxiaoguang
2024-11-18 13:25:42 +08:00
committed by GitHub
parent 4f879a00df
commit 8a20fba8eb
42 changed files with 568 additions and 508 deletions
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27
modules/markup/markdown/goldmark.go
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@ -7,9 +7,11 @@ import (
"fmt"
"regexp"
"strings"
"sync"
"code.gitea.io/gitea/modules/container"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/markup/internal"
"code.gitea.io/gitea/modules/setting"
"github.com/yuin/goldmark/ast"
@ -23,11 +25,13 @@ import (
// ASTTransformer is a default transformer of the goldmark tree.
type ASTTransformer struct {
renderInternal *internal.RenderInternal
attentionTypes container.Set[string]
}
func NewASTTransformer() *ASTTransformer {
func NewASTTransformer(renderInternal *internal.RenderInternal) *ASTTransformer {
return &ASTTransformer{
renderInternal: renderInternal,
attentionTypes: container.SetOf("note", "tip", "important", "warning", "caution"),
}
}
@ -109,12 +113,16 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
}
}
// NewHTMLRenderer creates a HTMLRenderer to render
// in the gitea form.
func NewHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
// it is copied from old code, which is quite doubtful whether it is correct
var reValidIconName = sync.OnceValue[*regexp.Regexp](func() *regexp.Regexp {
return regexp.MustCompile(`^[-\w]+$`) // old: regexp.MustCompile("^[a-z ]+$")
})
// NewHTMLRenderer creates a HTMLRenderer to render in the gitea form.
func NewHTMLRenderer(renderInternal *internal.RenderInternal, opts ...html.Option) renderer.NodeRenderer {
r := &HTMLRenderer{
Config: html.NewConfig(),
reValidName: regexp.MustCompile("^[a-z ]+$"),
renderInternal: renderInternal,
Config: html.NewConfig(),
}
for _, opt := range opts {
opt.SetHTMLOption(&r.Config)
@ -126,7 +134,7 @@ func NewHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
// renders gitea specific features.
type HTMLRenderer struct {
html.Config
reValidName *regexp.Regexp
renderInternal *internal.RenderInternal
}
// RegisterFuncs implements renderer.NodeRenderer.RegisterFuncs.
@ -214,12 +222,13 @@ func (r *HTMLRenderer) renderIcon(w util.BufWriter, source []byte, node ast.Node
return ast.WalkContinue, nil
}
if !r.reValidName.MatchString(name) {
if !reValidIconName().MatchString(name) {
// skip this
return ast.WalkContinue, nil
}
_, err := w.WriteString(fmt.Sprintf(`<i class="icon %s"></i>`, name))
// FIXME: the "icon xxx" is from Fomantic UI, it's really questionable whether it still works correctly
err := r.renderInternal.FormatWithSafeAttrs(w, `<i class="icon %s"></i>`, name)
if err != nil {
return ast.WalkStop, err
}