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add nip23 markdown helper.

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This commit is contained in:
fiatjaf 2024-12-22 23:31:22 -03:00
parent d0476edd06
commit 1778706817
3 changed files with 79 additions and 3 deletions
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6
go.mod
View File

@ -11,11 +11,13 @@ require (
github.com/fiatjaf/eventstore v0.9.0
github.com/gobwas/httphead v0.1.0
github.com/gobwas/ws v1.4.0
github.com/gomarkdown/markdown v0.0.0-20241205020045-f7e15b2f3e62
github.com/graph-gophers/dataloader/v7 v7.1.0
github.com/jmoiron/sqlx v1.3.5
github.com/json-iterator/go v1.1.12
github.com/mailru/easyjson v0.7.7
github.com/mattn/go-sqlite3 v1.14.18
github.com/microcosm-cc/bluemonday v1.0.27
github.com/ncruces/go-sqlite3 v0.18.3
github.com/puzpuzpuz/xsync/v3 v3.4.0
github.com/stretchr/testify v1.9.0
@ -25,7 +27,7 @@ require (
github.com/tyler-smith/go-bip39 v1.1.0
golang.org/x/crypto v0.28.0
golang.org/x/exp v0.0.0-20240909161429-701f63a606c0
golang.org/x/net v0.21.0
golang.org/x/net v0.26.0
golang.org/x/text v0.19.0
modernc.org/sqlite v1.33.1
)
@ -34,6 +36,7 @@ require (
github.com/FactomProject/basen v0.0.0-20150613233007-fe3947df716e // indirect
github.com/FactomProject/btcutilecc v0.0.0-20130527213604-d3a63a5752ec // indirect
github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
github.com/aymerick/douceur v0.2.0 // indirect
github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0 // indirect
github.com/cespare/xxhash/v2 v2.3.0 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
@ -41,6 +44,7 @@ require (
github.com/dustin/go-humanize v1.0.1 // indirect
github.com/gobwas/pool v0.2.1 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/gorilla/css v1.0.1 // indirect
github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
github.com/josharian/intern v1.0.0 // indirect
github.com/kr/pretty v0.3.1 // indirect

12
go.sum
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@ -5,6 +5,8 @@ github.com/FactomProject/btcutilecc v0.0.0-20130527213604-d3a63a5752ec/go.mod h1
github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8TVTI=
github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuPk=
github.com/aymerick/douceur v0.2.0/go.mod h1:wlT5vV2O3h55X9m7iVYN0TBM0NH/MmbLnd30/FjWUq4=
github.com/bluekeyes/go-gitdiff v0.7.1 h1:graP4ElLRshr8ecu0UtqfNTCHrtSyZd3DABQm/DWesQ=
github.com/bluekeyes/go-gitdiff v0.7.1/go.mod h1:QpfYYO1E0fTVHVZAZKiRjtSGY9823iCdvGXBcEzHGbM=
github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
@ -74,6 +76,8 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/gomarkdown/markdown v0.0.0-20241205020045-f7e15b2f3e62 h1:pbAFUZisjG4s6sxvRJvf2N7vhpCvx2Oxb3PmS6pDO1g=
github.com/gomarkdown/markdown v0.0.0-20241205020045-f7e15b2f3e62/go.mod h1:JDGcbDT52eL4fju3sZ4TeHGsQwhG9nbDV21aMyhwPoA=
github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@ -84,6 +88,8 @@ github.com/google/pprof v0.0.0-20240409012703-83162a5b38cd h1:gbpYu9NMq8jhDVbvlG
github.com/google/pprof v0.0.0-20240409012703-83162a5b38cd/go.mod h1:kf6iHlnVGwgKolg33glAes7Yg/8iWP8ukqeldJSO7jw=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/gorilla/css v1.0.1 h1:ntNaBIghp6JmvWnxbZKANoLyuXTPZ4cAMlo6RyhlbO8=
github.com/gorilla/css v1.0.1/go.mod h1:BvnYkspnSzMmwRK+b8/xgNPLiIuNZr6vbZBTPQ2A3b0=
github.com/graph-gophers/dataloader/v7 v7.1.0 h1:Wn8HGF/q7MNXcvfaBnLEPEFJttVHR8zuEqP1obys/oc=
github.com/graph-gophers/dataloader/v7 v7.1.0/go.mod h1:1bKE0Dm6OUcTB/OAuYVOZctgIz7Q3d0XrYtlIzTgg6Q=
github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
@ -115,6 +121,8 @@ github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D
github.com/mattn/go-sqlite3 v1.14.6/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
github.com/mattn/go-sqlite3 v1.14.18 h1:JL0eqdCOq6DJVNPSvArO/bIV9/P7fbGrV00LZHc+5aI=
github.com/mattn/go-sqlite3 v1.14.18/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
github.com/microcosm-cc/bluemonday v1.0.27 h1:MpEUotklkwCSLeH+Qdx1VJgNqLlpY2KXwXFM08ygZfk=
github.com/microcosm-cc/bluemonday v1.0.27/go.mod h1:jFi9vgW+H7c3V0lb6nR74Ib/DIB5OBs92Dimizgw2cA=
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
@ -183,8 +191,8 @@ golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73r
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200813134508-3edf25e44fcc/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=

64
nip23/markdown.go Normal file
View File

@ -0,0 +1,64 @@
package nip23
import (
stdhtml "html"
"io"
"regexp"
"strings"
"github.com/gomarkdown/markdown"
"github.com/gomarkdown/markdown/ast"
"github.com/gomarkdown/markdown/html"
"github.com/gomarkdown/markdown/parser"
"github.com/microcosm-cc/bluemonday"
)
var nostrEveryMatcher = regexp.MustCompile(`nostr:((npub|note|nevent|nprofile|naddr)1[a-z0-9]+)\b`)
var renderer = html.NewRenderer(html.RendererOptions{
Flags: html.HrefTargetBlank | html.SkipHTML,
RenderNodeHook: func(w io.Writer, node ast.Node, entering bool) (ast.WalkStatus, bool) {
switch v := node.(type) {
case *ast.HTMLSpan:
w.Write([]byte(stdhtml.EscapeString(string(v.Literal))))
return ast.GoToNext, true
case *ast.HTMLBlock:
w.Write([]byte(stdhtml.EscapeString(string(v.Literal))))
return ast.GoToNext, true
}
return ast.GoToNext, false
},
})
func MarkdownToHTML(md string) string {
md = strings.ReplaceAll(md, "\u00A0", " ")
// create markdown parser with extensions
// this parser is stateful so it must be reinitialized every time
doc := parser.NewWithExtensions(
parser.AutoHeadingIDs |
parser.NoIntraEmphasis |
parser.FencedCode |
parser.Autolink |
parser.Footnotes |
parser.SpaceHeadings,
).Parse([]byte(md))
// create HTML renderer with extensions
output := string(markdown.Render(doc, renderer))
// sanitize content
output = sanitizeXSS(output)
return output
}
func sanitizeXSS(html string) string {
p := bluemonday.UGCPolicy()
p.RequireNoFollowOnLinks(false)
p.AllowElements("video", "source")
p.AllowAttrs("controls", "width").OnElements("video")
p.AllowAttrs("src", "width").OnElements("source")
return p.Sanitize(html)
}