From bbc9fae4291d0c2cb3976d158ecd20e0bd2a8ea0 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <koszko@koszko.org>
Date: Tue, 15 Mar 2022 10:12:06 +0100
Subject: serialize and deserialize entire Response object when relaying
 fetch() calls to other contexts using sendMessage

---
 common/misc.js | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

(limited to 'common')

diff --git a/common/misc.js b/common/misc.js
index e609fe0..8096f27 100644
--- a/common/misc.js
+++ b/common/misc.js
@@ -42,9 +42,13 @@
  * proprietary program, I am not going to enforce this in court.
  */
 
-/* uint8_to_hex is a separate function used in cryptographic functions. */
+/*
+ * uint8_to_hex is a separate function used in cryptographic functions and when
+ * dealing with binary data.
+ */
 const uint8_to_hex =
       array => [...array].map(b => ("0" + b.toString(16)).slice(-2)).join("");
+#EXPORT uint8_to_hex
 
 /*
  * Asynchronously compute hex string representation of a sha256 digest of a
@@ -61,8 +65,7 @@ async function sha256_async(string) {
  * Generate a unique value that can be computed synchronously and is impossible
  * to guess for a malicious website.
  */
-function gen_nonce(length=16)
-{
+function gen_nonce(length=16) {
     const random_data = new Uint8Array(length);
     crypto.getRandomValues(random_data);
     return uint8_to_hex(random_data);
@@ -71,15 +74,9 @@ function gen_nonce(length=16)
 
 /* 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;
+      /^\s*(content-security-policy|x-webkit-csp|x-content-security-policy)\s*$/i;
 #EXPORT csp_header_regex
 
-/*
- * Print item together with type, e.g.
- * nice_name("s", "hello") → "hello (script)"
- */
-#EXPORT  (prefix, name) => `${name} (${TYPE_NAME[prefix]})`  AS nice_name
-
 /*
  * Check if url corresponds to a browser's special page (or a directory index in
  * case of `file://' protocol).
@@ -90,3 +87,13 @@ const priv_reg = /^moz-extension:\/\/|^about:|^view-source:|^file:\/\/[^?#]*\/([
 const priv_reg = /^chrome(-extension)?:\/\/|^about:|^view-source:|^file:\/\/[^?#]*\/([?#]|$)/;
 #ENDIF
 #EXPORT  url => priv_reg.test(url)  AS is_privileged_url
+
+/* Make it possible to serialize en Error object. */
+function error_data_jsonifiable(error) {
+    const jsonifiable = {};
+    for (const property of ["name", "message", "fileName", "lineNumber"])
+	jsonifiable[property] = error[property];
+
+    return jsonifiable;
+}
+#EXPORT error_data_jsonifiable
-- 
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