qt-everywhere-src-5.14.1/qtwebengine/tests/auto/widgets/proxypac/proxy.pac

function FindProxyForURL(url, host)
{
   if (shExpMatch(host, "*.proxy1.com")) return "PROXY localhost:5551";
   if (shExpMatch(host, "*.proxy2.com")) return "PROXY localhost:5552";
   return "PROXY proxy.url:8080";
}