bug#70312: [PATCH] Avoid unnecessary escaping in url-build-query-string

[Dagfinn Ilmari Mannsåker]

Hi,

While writing a custom URL function for git-link.el I noticed that
url-build-query-string unnecessarily escapes slashes in query parameter
values.  Here's a patch that fixes that by passing
url-query-allowed-chars to the url-hexify-string call.

- ilmari

>From ca1dbe67939ac78f5db06d746cd511928a138657 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dagfinn=20Ilmari=20Manns=C3=A5ker?= <ilmari@ilmari.org>
Date: Tue, 9 Apr 2024 15:02:45 +0100
Subject: [PATCH] Avoid unnecessary escaping in url-build-query-string

* lisp/url/url-util.el (url-build-query-string):
Pass url-query-allowed-chars to url-hexify-string to avoid unnecessarily
escaping characters that don't need to be escaped in a query string.
---
 lisp/url/url-util.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/url/url-util.el b/lisp/url/url-util.el
index 5f45b98c7a5..4fc0efcdf62 100644
--- a/lisp/url/url-util.el
+++ b/lisp/url/url-util.el
@@ -268,7 +268,8 @@ instead of just \"key\" as in the example above."
    (lambda (key-vals)
      (let ((escaped
             (mapcar (lambda (sym)
-                      (url-hexify-string (format "%s" sym))) key-vals)))
+                      (url-hexify-string (format "%s" sym) 
url-query-allowed-chars))
+                    key-vals)))
        (mapconcat (lambda (val)
                     (let ((vprint (format "%s" val))
                           (eprint (format "%s" (car escaped))))
-- 
2.39.2