[pbs-devel] [PATCH proxmox v2] fix #3302: allow for more characters for email

[Dominik Csapak <d.csapak@proxmox.com>]

change to something similar as in pve-common
word characters, +, -, ~ and . for the local part

and refactor it in a const_regex for reuse

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
note that we cannot use the regex in the api yet, as that would be a
breaking API change (we use a much more relaxed regex for a users email),
but we should do that for 2.0

 proxmox/src/tools/email.rs | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/proxmox/src/tools/email.rs b/proxmox/src/tools/email.rs
index b5d42c4..945f4db 100644
--- a/proxmox/src/tools/email.rs
+++ b/proxmox/src/tools/email.rs
@@ -1,10 +1,15 @@
 //! Email related utilities.
 
 use crate::tools::time::epoch_i64;
+use crate::const_regex;
 use anyhow::{bail, Error};
 use std::io::Write;
 use std::process::{Command, Stdio};
 
+const_regex!{
+    pub EMAIL_REGEX = r"^[\w\+\-\~\.]+@[a-zA-Z\.0-9-]+$";
+}
+
 /// Sends multi-part mail with text and/or html to a list of recipients
 ///
 /// ``sendmail`` is used for sending the mail.
@@ -16,20 +21,18 @@ pub fn sendmail(
     mailfrom: Option<&str>,
     author: Option<&str>,
 ) -> Result<(), Error> {
-    let mail_regex = regex::Regex::new(r"^[a-zA-Z\.0-9-]+@[a-zA-Z\.0-9-]+$").unwrap();
-
     if mailto.is_empty() {
         bail!("At least one recipient has to be specified!")
     }
 
     for recipient in mailto {
-        if !mail_regex.is_match(recipient) {
+        if !EMAIL_REGEX.is_match(recipient) {
             bail!("'{}' is not a valid email address", recipient)
         }
     }
 
     let mailfrom = mailfrom.unwrap_or("root");
-    if !mailfrom.eq("root") && !mail_regex.is_match(mailfrom) {
+    if !mailfrom.eq("root") && !EMAIL_REGEX.is_match(mailfrom) {
         bail!("'{}' is not a valid email address", mailfrom)
     }
 
-- 
2.20.1