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Filter invalid UTF8 from message body.

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Closes #134
This commit is contained in:
Martin Dosch 2024-01-18 19:46:18 +01:00
parent f8a24505f4
commit d67787ca0f
1 changed files with 11 additions and 0 deletions
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11
xmpp.go
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@ -35,6 +35,7 @@ import (
"net/http"
"net/url"
"os"
"regexp"
"slices"
"strconv"
"strings"
@ -1153,6 +1154,7 @@ func (c *Client) Send(chat Chat) (n int, err error) {
stanza := "<message to='%s' type='%s' id='%s' xml:lang='en'>" + subtext + "<body>%s</body>" + oobtext + thdtext + "</message>\n"
chat.Text = validUTF8(chat.Text)
return fmt.Fprintf(c.stanzaWriter, stanza,
xmlEscape(chat.Remote), xmlEscape(chat.Type), cnonce(), xmlEscape(chat.Text))
}
@ -1534,3 +1536,12 @@ func (t tee) Read(p []byte) (n int, err error) {
}
return
}
func validUTF8(s string) string {
// Remove invalid code points.
s = strings.ToValidUTF8(s, "<22>")
reg := regexp.MustCompile(`[\x{0000}-\x{0008}\x{000B}\x{000C}\x{000E}-\x{001F}]`)
s = reg.ReplaceAllString(s, "<22>")
return s
}