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"""
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))
)
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