Config: Update CSP header to allow loading content from a CDN #3454

Signed-off-by: Michael Mayer <michael@photoprism.app>

internal/config/config.go

@@ -429,6 +429,17 @@ func (c *Config) CdnUrl(res string) string {
 	return strings.TrimRight(c.options.CdnUrl, "/") + res
 }
 
+// CdnDomain returns the content delivery network domain name if specified.
+func (c *Config) CdnDomain() string {
+	if c.options.CdnUrl == "" {
+		return ""
+	} else if u, err := url.Parse(c.options.CdnUrl); err != nil {
+		return ""
+	} else {
+		return u.Hostname()
+	}
+}
+
 // CdnVideo checks if videos should be streamed using the configured CDN.
 func (c *Config) CdnVideo() bool {
 	if c.options.CdnUrl == "" {

internal/config/config_test.go

@@ -440,6 +440,20 @@ func TestConfig_CdnUrl(t *testing.T) {
 	assert.Equal(t, "http://foo:2342/foo/", c.CdnUrl("/"))
 }
 
+func TestConfig_CdnDomain(t *testing.T) {
+	c := NewConfig(CliTestContext())
+
+	assert.Equal(t, "", c.CdnDomain())
+	c.options.CdnUrl = "http://superhost:2342/"
+	assert.Equal(t, "superhost", c.CdnDomain())
+	c.options.CdnUrl = "https://foo.bar.com:2342/foo/"
+	assert.Equal(t, "foo.bar.com", c.CdnDomain())
+	c.options.CdnUrl = "http:/invalid:2342/foo/"
+	assert.Equal(t, "", c.CdnDomain())
+	c.options.CdnUrl = ""
+	assert.Equal(t, "", c.CdnDomain())
+}
+
 func TestConfig_CdnVideo(t *testing.T) {
 	c := NewConfig(CliTestContext())