Exclude HTML tags from Markdown post-processing
HTML tags are no longer processed for special links, etc Contents of <a>, <code> and <pre> are not processed for special links Processing for special links is done after Markdown conversion
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5e763baa12
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127eb439d7
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@ -7,6 +7,7 @@ package base
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import (
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"bytes"
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"fmt"
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"io"
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"net/http"
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"path"
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"path/filepath"
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@ -16,6 +17,8 @@ import (
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"github.com/russross/blackfriday"
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"github.com/gogits/gogs/modules/setting"
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"golang.org/x/net/html"
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)
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func isletter(c byte) bool {
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@ -217,12 +220,57 @@ func RenderRawMarkdown(body []byte, urlPrefix string) []byte {
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}
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func RenderMarkdown(rawBytes []byte, urlPrefix string) []byte {
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body := RenderSpecialLink(rawBytes, urlPrefix)
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body = RenderRawMarkdown(body, urlPrefix)
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body = Sanitizer.SanitizeBytes(body)
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return body
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result := RenderRawMarkdown(rawBytes, urlPrefix)
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result = PostProcessMarkdown(result, urlPrefix)
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result = Sanitizer.SanitizeBytes(result)
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return result
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}
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func RenderMarkdownString(raw, urlPrefix string) string {
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return string(RenderMarkdown([]byte(raw), urlPrefix))
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}
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func PostProcessMarkdown(rawHtml []byte, urlPrefix string) []byte {
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var buf bytes.Buffer
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tokenizer := html.NewTokenizer(bytes.NewReader(rawHtml))
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for html.ErrorToken != tokenizer.Next() {
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// A parse error has occurred, so return the original input unmodified
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return rawHtml
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token := tokenizer.Token()
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switch token.Type {
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case html.TextToken:
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text := []byte(token.String())
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text = RenderSpecialLink(text, urlPrefix)
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buf.Write(text)
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case html.StartTagToken:
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buf.WriteString(token.String())
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tagName := token.Data
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// If this is an excluded tag, we skip processing all output until a close tag is encountered
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if strings.EqualFold("a", tagName) || strings.EqualFold("code", tagName) || strings.EqualFold("pre", tagName) {
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for html.ErrorToken != tokenizer.Next() {
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token = tokenizer.Token()
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// Copy the token to the output verbatim
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buf.WriteString(token.String())
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// If this is the close tag, we are done
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if html.EndTagToken == token.Type && strings.EqualFold(tagName, token.Data) { break }
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}
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}
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default:
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buf.WriteString(token.String())
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}
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}
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if io.EOF == tokenizer.Err() {
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return buf.Bytes()
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}
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// If we are not at the end of the input, then some other parsing error has occurred, so return
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// the input verbatim.
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return rawHtml
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}
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