utilize Pattern Tree to decide the policy to use and modify HTTP response headers according to that policy

This commit also enhances the build script so that preprocessor conditionals can now use operators '&&' and '||'.
The features being developed are not yet included in the actual Haketilo build.
Some of the new source files contain similar functionality to other ones already existing in the source tree. At some point the latter will be removed.

1 files changed, 0 insertions, 11 deletions

diff --git a/common/misc.js b/common/misc.js
index dc4a598..82f6cbf 100644
--- a/common/misc.js
+++ b/common/misc.js
@@ -67,17 +67,6 @@ function gen_nonce(length=16)
 }
 #EXPORT gen_nonce
 
-/* CSP rule that blocks scripts according to policy's needs. */
-function make_csp_rule(policy)
-{
-    let rule = "prefetch-src 'none'; script-src-attr 'none';";
-    const script_src = policy.nonce !== undefined ?
-	  `'nonce-${policy.nonce}'` : "'none'";
-    rule += ` script-src ${script_src}; script-src-elem ${script_src};`;
-    return rule;
-}
-#EXPORT make_csp_rule
-
 /* Check if some HTTP header might define CSP rules. */
 const csp_header_regex =
       /^\s*(content-security-policy|x-webkit-csp|x-content-security-policy)/i;