in reply to Escape user name and password in LWP proxy call.

This is vague and contradictory. Please read "How do I post a question effectively?" and "SSCCE". Most of what follows is pure guesswork in terms of what you actually need.

Use of non-interpolating quotes would normally suffice: 

$ perl -Mstrict -Mwarnings -E 'my ($u, $p) = (q{W$X}, q{Y@Z}); say for
+ $u, $p'
W$X
Y@Z

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Use of interpolating quotes would normally cause problems: 

$ perl -Mstrict -Mwarnings -E 'my ($u, $p) = (qq{W$X}, qq{Y@Z}); say f
+or $u, $p'
Possible unintended interpolation of @Z in string at -e line 1.
Global symbol "$X" requires explicit package name (did you forget to d
+eclare "my $X"?) at -e line 1.
Global symbol "@Z" requires explicit package name (did you forget to d
+eclare "my @Z"?) at -e line 1.
Execution of -e aborted due to compilation errors.

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See also quotemeta.

What you wrote about the "URI::escape" and (later) "uri_escape" doesn't make much sense. URI has neither an escape() function nor a uri_escape() function; URI::Escape has the latter. Even my best guess at fixing typos doesn't help: 

$ perl -Mstrict -Mwarnings -E 'use URI::Escape; my ($u, $p) = (q{W$X},
+ q{Y@Z}); say for uri_escape($u), uri_escape($p)'
W%24X
Y%40Z

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We'll need some clarification on what you're actually doing here.

— Ken

Replies are listed 'Best First'.
Re^2: Escape user name and password in LWP proxy call.
by Anonymous Monk on Oct 14, 2021 at 15:30 UTC

    Thank you for revert.
    Below is what I tried to do, but didn't work, yes that was typo, i meant URI::Escape
    Is it because i tried escaping IP too, do i really need to escape ip address. 

    ##proxy authentication
$PROXY_USER = uri_escape($PROXY_USER);
$PROXY_PASSWD = uri_escape($PROXY_PASSWD);
$PROXY_IP = uri_escape($PROXY_IP);
    
           
my $proxy_url = "${PROXY_USER}:${PROXY_PASSWD}"."\@${PROXY_IP}:${PROXY
+_PORT}";    ### oh, just realized, looks like forgot to add "http://"
+. here before proxy user that's why it failed, can you just confirm t
+he same.

$ua->proxy(https => "$proxy_url");

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    Thank you
[reply]
[d/l]

      UPDATE: uri_escape, doesn't seem escaping (\) in username.

[reply]

        Sure it is:

        use strict;
use warnings;

use URI::Escape;
use Test::More tests => 2;

my $foo = 'a\b';
my $have = uri_escape ($foo);
my $want = 'a%5Cb';

isnt $have, $foo;
is $have, $want;

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        🦛

[reply]
[d/l]
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