as I know squid can be use a proxy server , but currently I don't want to use it , but want to use nginx ,I google "forward proxy " , and get some idea :
add
server {
listen 8080;
resolver 8.8.8.8;
location / {
proxy_pass http://$http_host$request_uri;
}

but when I add the context to nginx.conf , and reload nginx

view the website such as
http://127.0.0.1:8080/www.yahoo.com get no response ,so can guys help me :)
thanks.