Add CSP's connect-src directive to config (#547) (#548)

Author: maynagashev

exampleSite/config.toml

@@ -90,6 +90,8 @@ stylesrc = [
 ]
 scriptsrc = ["'self'", "'unsafe-inline'", "https://www.google-analytics.com"]
 prefetchsrc = ["'self'"]
+# connect-src directive – defines valid targets for to XMLHttpRequest (AJAX), WebSockets or EventSource
+connectsrc = ["'self'", "https://www.google-analytics.com"]
 
 [taxonomies]
 category = "categories"

layouts/partials/csp.html

@@ -1 +1 @@
-{{ printf `<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests; block-all-mixed-content; default-src 'self'; child-src %s; font-src %s; form-action %s; frame-src %s; img-src %s; object-src %s; style-src %s; script-src %s; prefetch-src %s;">` (delimit .Site.Params.csp.childsrc " ") (delimit .Site.Params.csp.fontsrc " ") (delimit .Site.Params.csp.formaction " ") (delimit .Site.Params.csp.framesrc " ") (delimit .Site.Params.csp.imgsrc " ") (delimit .Site.Params.csp.objectsrc " ") (delimit .Site.Params.csp.stylesrc " ") (delimit .Site.Params.csp.scriptsrc " ") (delimit .Site.Params.csp.prefetchsrc " ") | safeHTML }}
+{{ printf `<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests; block-all-mixed-content; default-src 'self'; child-src %s; font-src %s; form-action %s; frame-src %s; img-src %s; object-src %s; style-src %s; script-src %s; prefetch-src %s; connect-src %s;">` (delimit .Site.Params.csp.childsrc " ") (delimit .Site.Params.csp.fontsrc " ") (delimit .Site.Params.csp.formaction " ") (delimit .Site.Params.csp.framesrc " ") (delimit .Site.Params.csp.imgsrc " ") (delimit .Site.Params.csp.objectsrc " ") (delimit .Site.Params.csp.stylesrc " ") (delimit .Site.Params.csp.scriptsrc " ") (delimit .Site.Params.csp.prefetchsrc " ") (delimit .Site.Params.csp.connectsrc " ") | safeHTML }}