oppi.li
Signed-off-by: oppiliappan me@oppi.li
-83
appview/pages/markup/markdown.go
-83
appview/pages/markup/markdown.go
···
5
"bytes"
6
"fmt"
7
"io"
8
-
"maps"
9
"net/url"
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"path"
11
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"regexp"
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"slices"
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"strings"
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"github.com/alecthomas/chroma/v2"
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chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
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"github.com/alecthomas/chroma/v2/styles"
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"github.com/microcosm-cc/bluemonday"
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"github.com/yuin/goldmark"
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highlighting "github.com/yuin/goldmark-highlighting/v2"
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"github.com/yuin/goldmark/ast"
···
50
Sanitizer Sanitizer
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}
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53
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type Sanitizer struct {
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defaultPolicy *bluemonday.Policy
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}
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-
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func (rctx *RenderContext) RenderMarkdown(source string) string {
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md := goldmark.New(
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goldmark.WithExtensions(
···
170
return rctx.Sanitizer.defaultPolicy.Sanitize(html)
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}
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func NewSanitizer() Sanitizer {
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return Sanitizer{
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defaultPolicy: defaultPolicy(),
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}
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}
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func defaultPolicy() *bluemonday.Policy {
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policy := bluemonday.UGCPolicy()
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// Allow generally safe attributes
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generalSafeAttrs := []string{
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"abbr", "accept", "accept-charset",
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"accesskey", "action", "align", "alt",
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"aria-describedby", "aria-hidden", "aria-label", "aria-labelledby",
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"axis", "border", "cellpadding", "cellspacing", "char",
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"charoff", "charset", "checked",
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"clear", "cols", "colspan", "color",
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"compact", "coords", "datetime", "dir",
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"disabled", "enctype", "for", "frame",
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"headers", "height", "hreflang",
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"hspace", "ismap", "label", "lang",
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"maxlength", "media", "method",
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"multiple", "name", "nohref", "noshade",
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"nowrap", "open", "prompt", "readonly", "rel", "rev",
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"rows", "rowspan", "rules", "scope",
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"selected", "shape", "size", "span",
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"start", "summary", "tabindex", "target",
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"title", "type", "usemap", "valign", "value",
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"vspace", "width", "itemprop",
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}
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generalSafeElements := []string{
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"h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "br", "b", "i", "strong", "em", "a", "pre", "code", "img", "tt",
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"div", "ins", "del", "sup", "sub", "p", "ol", "ul", "table", "thead", "tbody", "tfoot", "blockquote", "label",
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"dl", "dt", "dd", "kbd", "q", "samp", "var", "hr", "ruby", "rt", "rp", "li", "tr", "td", "th", "s", "strike", "summary",
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"details", "caption", "figure", "figcaption",
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"abbr", "bdo", "cite", "dfn", "mark", "small", "span", "time", "video", "wbr",
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}
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policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
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// video
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policy.AllowAttrs("src", "autoplay", "controls").OnElements("video")
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// checkboxes
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policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
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policy.AllowAttrs("checked", "disabled", "data-source-position").OnElements("input")
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// for code blocks
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policy.AllowAttrs("class").Matching(regexp.MustCompile(`chroma`)).OnElements("pre")
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policy.AllowAttrs("class").Matching(regexp.MustCompile(strings.Join(slices.Collect(maps.Values(chroma.StandardTypes)), "|"))).OnElements("span")
223
-
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// centering content
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policy.AllowElements("center")
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policy.AllowAttrs("align", "style", "width", "height").Globally()
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policy.AllowStyles(
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"margin",
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"padding",
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"text-align",
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"font-weight",
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"text-decoration",
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"padding-left",
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"padding-right",
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"padding-top",
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"padding-bottom",
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"margin-left",
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"margin-right",
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"margin-top",
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"margin-bottom",
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)
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-
244
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return policy
245
-
}
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-
247
type MarkdownTransformer struct {
248
rctx *RenderContext
249
}
···
5
"bytes"
6
"fmt"
7
"io"
8
"net/url"
9
"path"
10
"strings"
11
12
chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
13
"github.com/alecthomas/chroma/v2/styles"
14
"github.com/yuin/goldmark"
15
highlighting "github.com/yuin/goldmark-highlighting/v2"
16
"github.com/yuin/goldmark/ast"
···
45
Sanitizer Sanitizer
46
}
47
48
func (rctx *RenderContext) RenderMarkdown(source string) string {
49
md := goldmark.New(
50
goldmark.WithExtensions(
···
161
return rctx.Sanitizer.defaultPolicy.Sanitize(html)
162
}
163
164
type MarkdownTransformer struct {
165
rctx *RenderContext
166
}
+90
appview/pages/markup/sanitizer.go
+90
appview/pages/markup/sanitizer.go
···
···
1
+
package markup
2
+
3
+
import (
4
+
"maps"
5
+
"regexp"
6
+
"slices"
7
+
"strings"
8
+
9
+
"github.com/alecthomas/chroma/v2"
10
+
"github.com/microcosm-cc/bluemonday"
11
+
)
12
+
13
+
type Sanitizer struct {
14
+
defaultPolicy *bluemonday.Policy
15
+
}
16
+
17
+
func NewSanitizer() Sanitizer {
18
+
return Sanitizer{
19
+
defaultPolicy: defaultPolicy(),
20
+
}
21
+
}
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+
23
+
func defaultPolicy() *bluemonday.Policy {
24
+
policy := bluemonday.UGCPolicy()
25
+
26
+
// Allow generally safe attributes
27
+
generalSafeAttrs := []string{
28
+
"abbr", "accept", "accept-charset",
29
+
"accesskey", "action", "align", "alt",
30
+
"aria-describedby", "aria-hidden", "aria-label", "aria-labelledby",
31
+
"axis", "border", "cellpadding", "cellspacing", "char",
32
+
"charoff", "charset", "checked",
33
+
"clear", "cols", "colspan", "color",
34
+
"compact", "coords", "datetime", "dir",
35
+
"disabled", "enctype", "for", "frame",
36
+
"headers", "height", "hreflang",
37
+
"hspace", "ismap", "label", "lang",
38
+
"maxlength", "media", "method",
39
+
"multiple", "name", "nohref", "noshade",
40
+
"nowrap", "open", "prompt", "readonly", "rel", "rev",
41
+
"rows", "rowspan", "rules", "scope",
42
+
"selected", "shape", "size", "span",
43
+
"start", "summary", "tabindex", "target",
44
+
"title", "type", "usemap", "valign", "value",
45
+
"vspace", "width", "itemprop",
46
+
}
47
+
48
+
generalSafeElements := []string{
49
+
"h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "br", "b", "i", "strong", "em", "a", "pre", "code", "img", "tt",
50
+
"div", "ins", "del", "sup", "sub", "p", "ol", "ul", "table", "thead", "tbody", "tfoot", "blockquote", "label",
51
+
"dl", "dt", "dd", "kbd", "q", "samp", "var", "hr", "ruby", "rt", "rp", "li", "tr", "td", "th", "s", "strike", "summary",
52
+
"details", "caption", "figure", "figcaption",
53
+
"abbr", "bdo", "cite", "dfn", "mark", "small", "span", "time", "video", "wbr",
54
+
}
55
+
56
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policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
57
+
58
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// video
59
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policy.AllowAttrs("src", "autoplay", "controls").OnElements("video")
60
+
61
+
// checkboxes
62
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policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
63
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policy.AllowAttrs("checked", "disabled", "data-source-position").OnElements("input")
64
+
65
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// for code blocks
66
+
policy.AllowAttrs("class").Matching(regexp.MustCompile(`chroma`)).OnElements("pre")
67
+
policy.AllowAttrs("class").Matching(regexp.MustCompile(strings.Join(slices.Collect(maps.Values(chroma.StandardTypes)), "|"))).OnElements("span")
68
+
69
+
// centering content
70
+
policy.AllowElements("center")
71
+
72
+
policy.AllowAttrs("align", "style", "width", "height").Globally()
73
+
policy.AllowStyles(
74
+
"margin",
75
+
"padding",
76
+
"text-align",
77
+
"font-weight",
78
+
"text-decoration",
79
+
"padding-left",
80
+
"padding-right",
81
+
"padding-top",
82
+
"padding-bottom",
83
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"margin-left",
84
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"margin-right",
85
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"margin-top",
86
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"margin-bottom",
87
+
)
88
+
89
+
return policy
90
+
}