[PATCH proxmox 2/4] api-types: refactor HTTP_URL_REGEX construction

[Thomas Ellmenreich <t.ellmenreich@proxmox.com>]

In preparation for the addition of a new URL regex, refactor out the
non scheme part of the regex to a separate constant.

Signed-off-by: Thomas Ellmenreich <t.ellmenreich@proxmox.com>
---
 proxmox-schema/src/api_types.rs | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/proxmox-schema/src/api_types.rs b/proxmox-schema/src/api_types.rs
index 553eb054..81878dbe 100644
--- a/proxmox-schema/src/api_types.rs
+++ b/proxmox-schema/src/api_types.rs
@@ -50,6 +50,15 @@ pub const CIDR_V6_REGEX_STR: &str = concatcp!(r"(?:", IPV6RE_STR, r"/\d{1,3})$")
 #[rustfmt::skip]
 pub const SAFE_ID_REGEX_STR: &str = r"(?:[A-Za-z0-9_][A-Za-z0-9._\-]*)";
 
+/// Regular expression string to match a host, optional port and optionally a
+/// path, although the path remains completely unvalidated except a few
+/// prohibited characters.
+///
+/// The host can either be a DNS name, bracketed IP or, when without port, a
+/// full IPv6
+#[rustfmt::skip]
+pub const URL_HOST_PORT_PATH_REGEX_STR: &str = concatcp!("(?:(?:(?:", DNS_NAME_STR, "|", IPRE_BRACKET_STR, ")(?::", PORT_REGEX_STR ,")?)|", IPV6RE_STR,")(?:/[^\x00-\x1F\x7F]*)?");
+
 #[rustfmt::skip]
 pub const DNS_LABEL_STR: &str = r"(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-]*[a-zA-Z0-9])?)";
 
@@ -103,7 +112,10 @@ const_regex! {
     pub DNS_ALIAS_REGEX = concatcp!(r"^", DNS_ALIAS_NAME_STR, r"$");
     pub DNS_NAME_OR_IP_REGEX = concatcp!(r"^(?:", DNS_NAME_STR, "|",  IPRE_STR, r")$");
     pub HOST_PORT_REGEX = concatcp!(r"^(?:", DNS_NAME_STR, "|", IPRE_BRACKET_STR, "):", PORT_REGEX_STR ,"$");
-    pub HTTP_URL_REGEX = concatcp!(r"^https?://(?:(?:(?:", DNS_NAME_STR, "|", IPRE_BRACKET_STR, ")(?::", PORT_REGEX_STR ,")?)|", IPV6RE_STR,")(?:/[^\x00-\x1F\x7F]*)?$");
+
+    /// A specialisation of [`URL_REGEX`] regex that only allows http and
+    /// https as the URL scheme
+    pub HTTP_URL_REGEX = concatcp!(r"^https?://", URL_HOST_PORT_PATH_REGEX_STR, "$");
 
     /// Regex to match SHA256 Digest.
     pub SHA256_HEX_REGEX = r"^[a-f0-9]{64}$";
-- 
2.47.3