old_contents: """
  tcp_message Inline Script Hook API Demonstration
  ------------------------------------------------
  
  * modifies packets containing "foo" to "bar"
  * prints various details for each packet.
  
  example cmdline invocation:
  mitmdump -T --host --tcp ".*" -q -s examples/tcp_message.py
  """
  from mitmproxy.utils import strutils
  from mitmproxy import ctx
  
  
  def tcp_message(tcp_msg):
      modified_msg = tcp_msg.message.replace("foo", "bar")
  
      is_modified = False if modified_msg == tcp_msg.message else True
      tcp_msg.message = modified_msg
  
      ctx.log.info(
          "[tcp_message{}] from {} {} to {} {}:\r\n{}".format(
              " (modified)" if is_modified else "",
              "client" if tcp_msg.sender == tcp_msg.client_conn else "server",
              tcp_msg.sender.address,
              "server" if tcp_msg.receiver == tcp_msg.server_conn else "client",
              tcp_msg.receiver.address, strutils.bytes_to_escaped_str(tcp_msg.message))
      )
  
new_contents: """
  tcp_message Inline Script Hook API Demonstration
  ------------------------------------------------
  
  * modifies packets containing "foo" to "bar"
  * prints various details for each packet.
  
  example cmdline invocation:
  mitmdump --rawtcp --tcp-host ".*" -s examples/complex/tcp_message.py
  """
  from mitmproxy.utils import strutils
  from mitmproxy import ctx
  from mitmproxy import tcp
  
  
  def tcp_message(flow: tcp.TCPFlow):
      message = flow.messages[-1]
      old_content = message.content
      message.content = old_content.replace(b"foo", b"bar")
  
      ctx.log.info(
          "[tcp_message{}] from {} to {}:\n{}".format(
              " (modified)" if message.content != old_content else "",
              "client" if message.from_client else "server",
              "server" if message.from_client else "client",
              strutils.bytes_to_escaped_str(message.content))
      )
  
subject: fix tcp example