automatically ignore known forwarded addresses, fixes #64

This commit is contained in:
Aine
2023-09-18 12:35:37 +03:00
parent e90925eceb
commit 60b4386dd8
187 changed files with 4070 additions and 2667 deletions

View File

@@ -1,3 +1,4 @@
// Package html implements renderer that outputs HTMLs.
package html
import (
@@ -253,15 +254,17 @@ var GlobalAttributeFilter = util.NewBytesFilter(
[]byte("translate"),
)
func (r *Renderer) renderDocument(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderDocument(
w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
// nothing to do
return ast.WalkContinue, nil
}
// HeadingAttributeFilter defines attribute names which heading elements can have
// HeadingAttributeFilter defines attribute names which heading elements can have.
var HeadingAttributeFilter = GlobalAttributeFilter
func (r *Renderer) renderHeading(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderHeading(
w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
n := node.(*ast.Heading)
if entering {
_, _ = w.WriteString("<h")
@@ -278,12 +281,13 @@ func (r *Renderer) renderHeading(w util.BufWriter, source []byte, node ast.Node,
return ast.WalkContinue, nil
}
// BlockquoteAttributeFilter defines attribute names which blockquote elements can have
// BlockquoteAttributeFilter defines attribute names which blockquote elements can have.
var BlockquoteAttributeFilter = GlobalAttributeFilter.Extend(
[]byte("cite"),
)
func (r *Renderer) renderBlockquote(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderBlockquote(
w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
if entering {
if n.Attributes() != nil {
_, _ = w.WriteString("<blockquote")
@@ -308,7 +312,8 @@ func (r *Renderer) renderCodeBlock(w util.BufWriter, source []byte, n ast.Node,
return ast.WalkContinue, nil
}
func (r *Renderer) renderFencedCodeBlock(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderFencedCodeBlock(
w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
n := node.(*ast.FencedCodeBlock)
if entering {
_, _ = w.WriteString("<pre><code")
@@ -326,7 +331,8 @@ func (r *Renderer) renderFencedCodeBlock(w util.BufWriter, source []byte, node a
return ast.WalkContinue, nil
}
func (r *Renderer) renderHTMLBlock(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderHTMLBlock(
w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
n := node.(*ast.HTMLBlock)
if entering {
if r.Unsafe {
@@ -428,7 +434,7 @@ func (r *Renderer) renderParagraph(w util.BufWriter, source []byte, n ast.Node,
func (r *Renderer) renderTextBlock(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
if !entering {
if _, ok := n.NextSibling().(ast.Node); ok && n.FirstChild() != nil {
if n.NextSibling() != nil && n.FirstChild() != nil {
_ = w.WriteByte('\n')
}
}
@@ -444,7 +450,8 @@ var ThematicAttributeFilter = GlobalAttributeFilter.Extend(
[]byte("width"), // [Deprecated]
)
func (r *Renderer) renderThematicBreak(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderThematicBreak(
w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
if !entering {
return ast.WalkContinue, nil
}
@@ -473,7 +480,8 @@ var LinkAttributeFilter = GlobalAttributeFilter.Extend(
[]byte("target"),
)
func (r *Renderer) renderAutoLink(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderAutoLink(
w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
n := node.(*ast.AutoLink)
if !entering {
return ast.WalkContinue, nil
@@ -528,7 +536,8 @@ func (r *Renderer) renderCodeSpan(w util.BufWriter, source []byte, n ast.Node, e
// EmphasisAttributeFilter defines attribute names which emphasis elements can have.
var EmphasisAttributeFilter = GlobalAttributeFilter
func (r *Renderer) renderEmphasis(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderEmphasis(
w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
n := node.(*ast.Emphasis)
tag := "em"
if n.Level == 2 {
@@ -618,7 +627,8 @@ func (r *Renderer) renderImage(w util.BufWriter, source []byte, node ast.Node, e
return ast.WalkSkipChildren, nil
}
func (r *Renderer) renderRawHTML(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
func (r *Renderer) renderRawHTML(
w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
if !entering {
return ast.WalkSkipChildren, nil
}
@@ -901,20 +911,24 @@ var bVb = []byte("vbscript:")
var bFile = []byte("file:")
var bData = []byte("data:")
func hasPrefix(s, prefix []byte) bool {
return len(s) >= len(prefix) && bytes.Equal(bytes.ToLower(s[0:len(prefix)]), bytes.ToLower(prefix))
}
// IsDangerousURL returns true if the given url seems a potentially dangerous url,
// otherwise false.
func IsDangerousURL(url []byte) bool {
if bytes.HasPrefix(url, bDataImage) && len(url) >= 11 {
if hasPrefix(url, bDataImage) && len(url) >= 11 {
v := url[11:]
if bytes.HasPrefix(v, bPng) || bytes.HasPrefix(v, bGif) ||
bytes.HasPrefix(v, bJpeg) || bytes.HasPrefix(v, bWebp) ||
bytes.HasPrefix(v, bSvg) {
if hasPrefix(v, bPng) || hasPrefix(v, bGif) ||
hasPrefix(v, bJpeg) || hasPrefix(v, bWebp) ||
hasPrefix(v, bSvg) {
return false
}
return true
}
return bytes.HasPrefix(url, bJs) || bytes.HasPrefix(url, bVb) ||
bytes.HasPrefix(url, bFile) || bytes.HasPrefix(url, bData)
return hasPrefix(url, bJs) || hasPrefix(url, bVb) ||
hasPrefix(url, bFile) || hasPrefix(url, bData)
}
func nodeToHTMLText(n ast.Node, source []byte) []byte {