tproxy 是简单 TCP 路由代理 (layer 7)  ，基于 Gevent，可以使用 Python 配置路线逻辑。tproxy 灵感来源于 proxy machine，但是有一些独特的特性，比如 Gunicorn 的预先 fork 人工模式。

使用：

$ tproxy -h  Usage: tproxy [OPTIONS] script_path  Options:    --version                     show program's version number and exit    -h, --help                    show this help message and exit    --log-file=FILE               The log file to write to. [-]    --log-level=LEVEL             The granularity of log outputs. [info]    --log-config=FILE             The log config file to use. [None]    -n STRING, --name=STRING      A base to use with setproctitle for process naming.                                  [None]    -D, --daemon                  Daemonize the tproxy process. [False]    -p FILE, --pid=FILE           A filename to use for the PID file. [None]    -u USER, --user=USER          Switch worker processes to run as this user. [501]    -g GROUP, --group=GROUP                                  Switch worker process to run as this group. [20]    -m INT, --umask=INT           A bit mask for the file mode on files written by                                  tproxy. [0]    -b ADDRESS, --bind=ADDRESS    The socket to bind. [127.0.0.1:8000]    --backlog=INT                 The maximum number of pending connections.     [2048]    --ssl-keyfile=STRING          Ssl key file [None]    --ssl-certfile=STRING         Ssl ca certs file. contains concatenated                                  "certification [None]    --ssl-ca-certs=STRING         Ssl ca certs file. contains concatenated                                  "certification [None]    --ssl-cert-reqs=INT           Specifies whether a certificate is required from the                                  other [0]    -w INT, --workers=INT         The number of worker process for handling requests. [1]    --worker-connections=INT      The maximum number of simultaneous clients per worker.                                  [1000]    -t INT, --timeout=INT         Workers silent for more than this many seconds are                                  killed and restarted. [30]

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