fix: CSP policy missing front components like icons, nextui color mode, wasm

api/handlers/frontend/inlineScripts.go

@@ -0,0 +1,33 @@
+package frontend
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"regexp"
+	"strings"
+)
+
+const scriptSrcSelf = "script-src 'self'"
+
+var inlineScriptPattern = regexp.MustCompile(`(?is)<script(\s[^>]*)?>(.*?)</script>`)
+var srcAttributePattern = regexp.MustCompile(`(?i)\ssrc\s*=`)
+
+func inlineScriptSources(html []byte) []string {
+	var sources []string
+	for _, match := range inlineScriptPattern.FindAllSubmatch(html, -1) {
+		if srcAttributePattern.Match(match[1]) || strings.TrimSpace(string(match[2])) == "" {
+			continue
+		}
+		digest := sha256.Sum256(match[2])
+		sources = append(sources, "'sha256-"+base64.StdEncoding.EncodeToString(digest[:])+"'")
+	}
+	return sources
+}
+
+func AllowInlineScripts(policy string, html []byte) string {
+	sources := inlineScriptSources(html)
+	if len(sources) == 0 {
+		return policy
+	}
+	return strings.Replace(policy, scriptSrcSelf, scriptSrcSelf+" "+strings.Join(sources, " "), 1)
+}