can't access non ssl (http) api while set socks4/5 proxy

[hosseinipour]

when i set socks4/5 external proxy like 192.111.139.165:4145

 SocksProxy.initProxy(
    proxy: 'SOCKS5 192.111.139.165:4145',
    onCreate: (client) {
      client.badCertificateCallback =
          (X509Certificate cert, String host, int port) => true;
    },

then i cant access http aips and get this error

Unhandled Exception: Connection reset by peer

by setting internal proxy like 127.0.0.1:2081, i get different error

Unhandled Exception: Connection closed before full header was received

it woks fine with https apis and i don't have this problem with http PROXY IP:PORT proxies.