shadow is a simple and fast http proxy written by Go.

Start a transparent http proxy

./shadow -addr :7778

With parent proxy

./shadow -addr :7777 -proxy :7778

Using configuration file instead of command line args

./shadow -c shadow.json

Here is a config sample

{
  "addr": ":7778",
  "dial_timeout": 30000,
  "read_timeout": 30000,
  "proxy": "",
  "verbose": true
}