The correct code is:

print $q->redirect(
    -uri    => 'http://localhost/',
    -cookie => [ $set_session, $set_username ],
    );

[download]

In reply to Re^3: CGI error: "Invalid header value contains a newline not followed by whitespace" by tobyink
in thread CGI error: "Invalid header value contains a newline not followed by whitespace" by MyMonkName

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