Golang blackfriday.HtmlRenderer函数代码示例

// RenderRaw renders Markdown to HTML without handling special links.
func RenderRaw(body []byte, urlPrefix string) []byte {
	htmlFlags := 0
	htmlFlags |= blackfriday.HTML_SKIP_STYLE
	htmlFlags |= blackfriday.HTML_OMIT_CONTENTS
	renderer := &Renderer{
		Renderer:  blackfriday.HtmlRenderer(htmlFlags, "", ""),
		urlPrefix: urlPrefix,
	}

	// set up the parser
	extensions := 0
	extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= blackfriday.EXTENSION_TABLES
	extensions |= blackfriday.EXTENSION_FENCED_CODE
	extensions |= blackfriday.EXTENSION_AUTOLINK
	extensions |= blackfriday.EXTENSION_STRIKETHROUGH
	extensions |= blackfriday.EXTENSION_SPACE_HEADERS
	extensions |= blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK

	if setting.Markdown.EnableHardLineBreak {
		extensions |= blackfriday.EXTENSION_HARD_LINE_BREAK
	}

	body = blackfriday.Markdown(body, renderer, extensions)
	return body
}

func RenderMarkdown(rawBytes []byte, urlPrefix string) []byte {
	// slow!
	//body := RenderSpecialLink(rawBytes, urlPrefix)
	body := rawBytes
	htmlFlags := 0
	// htmlFlags |= gfm.HTML_USE_XHTML
	// htmlFlags |= gfm.HTML_USE_SMARTYPANTS
	// htmlFlags |= gfm.HTML_SMARTYPANTS_FRACTIONS
	// htmlFlags |= gfm.HTML_SMARTYPANTS_LATEX_DASHES
	// htmlFlags |= gfm.HTML_SKIP_HTML
	htmlFlags |= gfm.HTML_SKIP_STYLE
	//htmlFlags |= gfm.HTML_SKIP_SCRIPT
	htmlFlags |= gfm.HTML_GITHUB_BLOCKCODE
	htmlFlags |= gfm.HTML_OMIT_CONTENTS
	// htmlFlags |= gfm.HTML_COMPLETE_PAGE
	renderer := &CustomRender{
		Renderer:  gfm.HtmlRenderer(htmlFlags, "", ""),
		urlPrefix: urlPrefix,
	}

	// set up the parser
	extensions := 0
	extensions |= gfm.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= gfm.EXTENSION_TABLES
	extensions |= gfm.EXTENSION_FENCED_CODE
	extensions |= gfm.EXTENSION_AUTOLINK
	extensions |= gfm.EXTENSION_STRIKETHROUGH
	extensions |= gfm.EXTENSION_HARD_LINE_BREAK
	extensions |= gfm.EXTENSION_SPACE_HEADERS
	extensions |= gfm.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK

	body = gfm.Markdown(body, renderer, extensions)
	return body
}

func RenderMarkdown(mdStr string) string {
	htmlFlags := 0
	htmlFlags |= blackfriday.HTML_USE_XHTML
	// htmlFlags |= blackfriday.HTML_USE_SMARTYPANTS
	// htmlFlags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
	// htmlFlags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
	htmlFlags |= blackfriday.HTML_SKIP_HTML
	htmlFlags |= blackfriday.HTML_SKIP_STYLE
	htmlFlags |= blackfriday.HTML_SKIP_SCRIPT
	htmlFlags |= blackfriday.HTML_GITHUB_BLOCKCODE
	htmlFlags |= blackfriday.HTML_OMIT_CONTENTS
	htmlFlags |= blackfriday.HTML_COMPLETE_PAGE
	renderer := blackfriday.HtmlRenderer(htmlFlags, "", "")

	// set up the parser
	extensions := 0
	extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= blackfriday.EXTENSION_TABLES
	extensions |= blackfriday.EXTENSION_FENCED_CODE
	extensions |= blackfriday.EXTENSION_AUTOLINK
	extensions |= blackfriday.EXTENSION_STRIKETHROUGH
	extensions |= blackfriday.EXTENSION_HARD_LINE_BREAK
	extensions |= blackfriday.EXTENSION_SPACE_HEADERS
	extensions |= blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK

	body := blackfriday.Markdown([]byte(mdStr), renderer, extensions)

	return string(body)
}

func RenderMarkdownSafe(input []byte) []byte {
	// set up the HTML renderer
	flags := 0
	flags |= blackfriday.HTML_USE_XHTML
	flags |= blackfriday.HTML_USE_SMARTYPANTS
	flags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
	flags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
	flags |= blackfriday.HTML_SKIP_HTML
	flags |= blackfriday.HTML_SKIP_SCRIPT
	flags |= blackfriday.HTML_SKIP_STYLE
	// flags |= blackfriday.HTML_TOC
	// flags |= blackfriday.HTML_GITHUB_BLOCKCODE
	renderer := blackfriday.HtmlRenderer(flags, "", "")

	// set up the parser
	ext := 0
	ext |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	ext |= blackfriday.EXTENSION_TABLES
	ext |= blackfriday.EXTENSION_FENCED_CODE
	ext |= blackfriday.EXTENSION_AUTOLINK
	ext |= blackfriday.EXTENSION_STRIKETHROUGH
	ext |= blackfriday.EXTENSION_SPACE_HEADERS
	ext |= blackfriday.EXTENSION_HARD_LINE_BREAK
	ext |= blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK

	return blackfriday.Markdown(input, renderer, ext)
}

// Renders markdown in submitted messages.
func Render(raw []byte) []byte {
	htmlFlags := 0
	htmlFlags |= blackfriday.HTML_USE_XHTML
	htmlFlags |= blackfriday.HTML_USE_SMARTYPANTS
	htmlFlags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
	htmlFlags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
	renderer := blackfriday.HtmlRenderer(htmlFlags, "", "")

	// set up the parser
	extensions := 0
	extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= blackfriday.EXTENSION_TABLES
	extensions |= blackfriday.EXTENSION_FENCED_CODE
	extensions |= blackfriday.EXTENSION_STRIKETHROUGH
	extensions |= blackfriday.EXTENSION_SPACE_HEADERS

	escaped := new(bytes.Buffer)
	template.HTMLEscape(escaped, raw)
	rendered := blackfriday.Markdown(escaped.Bytes(), renderer, extensions)
	enabled := true
	fmt.Println("Raw message:")
	fmt.Println(string(raw))
	if enabled {
		fmt.Println("Rendered message:")
		fmt.Println(string(rendered))
		return rendered
	}
	return raw
}

func markdown(raw []byte) []byte {
	htmlFlags := 0
	htmlFlags |= blackfriday.HTML_USE_XHTML
	htmlFlags |= blackfriday.HTML_USE_SMARTYPANTS
	htmlFlags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
	htmlFlags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
	htmlFlags |= blackfriday.HTML_OMIT_CONTENTS
	htmlFlags |= blackfriday.HTML_COMPLETE_PAGE

	renderer := &CustomRender{
		Renderer: blackfriday.HtmlRenderer(htmlFlags, "", ""),
	}

	// set up the parser
	extensions := 0
	extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= blackfriday.EXTENSION_TABLES
	extensions |= blackfriday.EXTENSION_FENCED_CODE
	extensions |= blackfriday.EXTENSION_AUTOLINK
	extensions |= blackfriday.EXTENSION_STRIKETHROUGH
	extensions |= blackfriday.EXTENSION_HARD_LINE_BREAK
	extensions |= blackfriday.EXTENSION_SPACE_HEADERS
	extensions |= blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK

	body := blackfriday.Markdown(raw, renderer, extensions)
	return body
}

func RenderRawMarkdown(body []byte, urlPrefix string) []byte {
	htmlFlags := 0
	// htmlFlags |= blackfriday.HTML_USE_XHTML
	// htmlFlags |= blackfriday.HTML_USE_SMARTYPANTS
	// htmlFlags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
	// htmlFlags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
	// htmlFlags |= blackfriday.HTML_SKIP_HTML
	htmlFlags |= blackfriday.HTML_SKIP_STYLE
	// htmlFlags |= blackfriday.HTML_SKIP_SCRIPT
	// htmlFlags |= blackfriday.HTML_GITHUB_BLOCKCODE
	htmlFlags |= blackfriday.HTML_OMIT_CONTENTS
	// htmlFlags |= blackfriday.HTML_COMPLETE_PAGE
	renderer := &CustomRender{
		Renderer:  blackfriday.HtmlRenderer(htmlFlags, "", ""),
		urlPrefix: urlPrefix,
	}

	// set up the parser
	extensions := 0
	extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= blackfriday.EXTENSION_TABLES
	extensions |= blackfriday.EXTENSION_FENCED_CODE
	extensions |= blackfriday.EXTENSION_AUTOLINK
	extensions |= blackfriday.EXTENSION_STRIKETHROUGH
	extensions |= blackfriday.EXTENSION_SPACE_HEADERS
	extensions |= blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK

	if setting.Markdown.EnableHardLineBreak {
		extensions |= blackfriday.EXTENSION_HARD_LINE_BREAK
	}

	body = blackfriday.Markdown(body, renderer, extensions)
	return body
}

// RenderPost runs the input source through the blackfriday library.
func RenderPost(post *Post, input []byte, page PageParams) ([]byte, error) {
	tpl, err := page.getTemplate("post")
	if err != nil {
		return nil, err
	}

	content := blackfriday.Markdown(
		input,
		blackfriday.HtmlRenderer(page.Blog.GetMarkdownHTMLOptions(), "", ""),
		page.Blog.GetMarkdownExtensions())

	page.Title = post.Title
	params := PostPageParams{
		Post:       post,
		Content:    string(content),
		PageParams: page,
	}

	buf := new(bytes.Buffer)
	if err := tpl.Execute(buf, params); err != nil {
		return nil, err
	}

	return wrapPage(buf.Bytes(), params.PageParams)
}

// Markdown renders GitHub Flavored Markdown text.
func Markdown(text []byte) []byte {
	htmlFlags := 0
	renderer := &renderer{Html: blackfriday.HtmlRenderer(htmlFlags, "", "").(*blackfriday.Html)}

	// Parser extensions for GitHub Flavored Markdown.
	extensions := 0
	extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= blackfriday.EXTENSION_TABLES
	extensions |= blackfriday.EXTENSION_FENCED_CODE
	extensions |= blackfriday.EXTENSION_AUTOLINK
	extensions |= blackfriday.EXTENSION_STRIKETHROUGH
	extensions |= blackfriday.EXTENSION_SPACE_HEADERS
	//extensions |= blackfriday.EXTENSION_HARD_LINE_BREAK

	unsanitized := blackfriday.Markdown(text, renderer, extensions)

	// GitHub Flavored Markdown-like sanitization policy.
	p := bluemonday.UGCPolicy()
	p.AllowAttrs("class").Matching(bluemonday.SpaceSeparatedTokens).OnElements("div", "span")
	p.AllowAttrs("class", "name").Matching(bluemonday.SpaceSeparatedTokens).OnElements("a")
	p.AllowAttrs("rel").Matching(regexp.MustCompile(`^nofollow$`)).OnElements("a")
	p.AllowAttrs("aria-hidden").Matching(regexp.MustCompile(`^true$`)).OnElements("a")
	p.AllowDataURIImages()

	return p.SanitizeBytes(unsanitized)
}

// serveFile serves a file from disk, converting any markdown to HTML.
func serveFile(w http.ResponseWriter, r *http.Request, relPath, absPath string) {
	if !strings.HasSuffix(absPath, ".html") && !strings.HasSuffix(absPath, ".md") {
		http.ServeFile(w, r, absPath)
		return
	}

	data, err := ioutil.ReadFile(absPath)
	if err != nil {
		serveError(w, r, absPath, err)
		return
	}

	var markdownRenderer = blackfriday.HtmlRenderer(markdownHTMLFlags, "", "")
	data = blackfriday.MarkdownOptions(data, markdownRenderer, blackfriday.Options{Extensions: markdownExtensions})

	title := ""
	if m := h1TitlePattern.FindSubmatch(data); len(m) > 1 {
		title = string(m[1])
	}

	servePage(w, pageParams{
		title:   title,
		content: data,
	})
}

func markdownParse(c *Controller) ([]*markdown.Config, error) {
	var mdconfigs []*markdown.Config

	for c.Next() {
		md := &markdown.Config{
			Renderer:    blackfriday.HtmlRenderer(0, "", ""),
			Templates:   make(map[string]string),
			StaticFiles: make(map[string]string),
		}

		// Get the path scope
		if !c.NextArg() || c.Val() == "{" {
			return mdconfigs, c.ArgErr()
		}
		md.PathScope = c.Val()

		// Load any other configuration parameters
		for c.NextBlock() {
			if err := loadParams(c, md); err != nil {
				return mdconfigs, err
			}
		}

		// If no extensions were specified, assume .md
		if len(md.Extensions) == 0 {
			md.Extensions = []string{".md"}
		}

		mdconfigs = append(mdconfigs, md)
	}

	return mdconfigs, nil
}

func markdownFile(path string) (string, error) {
	if input, err := ioutil.ReadFile(path); err == nil {
		htmlFlags := 0
		htmlFlags |= blackfriday.HTML_USE_XHTML
		htmlFlags |= blackfriday.HTML_USE_SMARTYPANTS
		htmlFlags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
		htmlFlags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
		renderer := blackfriday.HtmlRenderer(htmlFlags, "", "")

		// set up the parser
		extensions := 0
		extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
		extensions |= blackfriday.EXTENSION_TABLES
		extensions |= blackfriday.EXTENSION_FENCED_CODE
		extensions |= blackfriday.EXTENSION_AUTOLINK
		extensions |= blackfriday.EXTENSION_STRIKETHROUGH
		extensions |= blackfriday.EXTENSION_SPACE_HEADERS
		extensions |= blackfriday.EXTENSION_FOOTNOTES

		data := blackfriday.Markdown(input, renderer, extensions)
		return string(data), nil
	} else {
		return "", err
	}
}

func pageRenderMarkdown(content string) (res string) {
	renderer := blackfriday.HtmlRenderer(htmlFlags, "", "")
	unsafe := blackfriday.MarkdownOptions([]byte(content), renderer, blackfriday.Options{
		Extensions: markdownExtensions})
	res = string(unsafe)
	return
}

func NewCustomHtml(c *config.Config) MarkdownTransformer {
	// set up the HTML renderer
	htmlFlags := 0
	htmlFlags |= blackfriday.HTML_USE_XHTML
	htmlFlags |= blackfriday.HTML_USE_SMARTYPANTS
	htmlFlags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
	htmlFlags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
	htmlFlags |= blackfriday.HTML_SKIP_SCRIPT

	// set up the parser
	extensions := 0
	extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= blackfriday.EXTENSION_TABLES
	extensions |= blackfriday.EXTENSION_FENCED_CODE
	extensions |= blackfriday.EXTENSION_PLUGIN
	extensions |= blackfriday.EXTENSION_AUTOLINK
	extensions |= blackfriday.EXTENSION_STRIKETHROUGH
	extensions |= blackfriday.EXTENSION_SPACE_HEADERS

	// Plugins
	plugins := make(map[string]Plugin)

	// Wrap up everything
	htmlRenderer := blackfriday.HtmlRenderer(htmlFlags, "", "")
	customRenderer := &CustomHtml{html: htmlRenderer,
		config:  c,
		plugins: plugins}
	transformer := &CustomMarkdownTransformer{renderer: customRenderer,
		extensions: extensions,
		plugins:    plugins}
	return transformer
}

func init() {

	// render the data into HTML
	var htmlFlags = 0
	htmlFlags |= blackfriday.HTML_SKIP_HTML
	htmlFlags |= blackfriday.HTML_SKIP_STYLE
	htmlFlags |= blackfriday.HTML_GITHUB_BLOCKCODE
	// htmlFlags |= blackfriday.HTML_USE_XHTML
	// htmlFlags |= blackfriday.HTML_USE_SMARTYPANTS
	// htmlFlags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
	// htmlFlags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
	// htmlFlags |= blackfriday.HTML_COMPLETE_PAGE
	// htmlFlags |= blackfriday.HTML_OMIT_CONTENTS
	// htmlFlags |= blackfriday.HTML_TOC

	title := ""
	css := ""
	renderer = blackfriday.HtmlRenderer(htmlFlags, title, css)

	// set up options
	extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
	extensions |= blackfriday.EXTENSION_TABLES
	extensions |= blackfriday.EXTENSION_FENCED_CODE
	extensions |= blackfriday.EXTENSION_AUTOLINK
	extensions |= blackfriday.EXTENSION_STRIKETHROUGH
	extensions |= blackfriday.EXTENSION_SPACE_HEADERS
	extensions |= blackfriday.EXTENSION_HARD_LINE_BREAK // 强制换行

	// var output []byte
	// output = blackfriday.Markdown(input, renderer, extensions)
}