$ mitmweb --version
Mitmproxy: 4.0.4
Python:    3.7.3
OpenSSL:   OpenSSL 1.1.0i  14 Aug 2018
Platform:  Windows-10-10.0.17763-SP0

$ mitmdump --version
Mitmproxy: 4.0.4
Python:    3.7.3
OpenSSL:   OpenSSL 1.1.0i  14 Aug 2018
Platform:  Windows-10-10.0.17763-SP0

mitmproxy -p 8200 --set block_global=false

mitmproxy 
-p  // 设置监听端口号
--set block_global=false // 公网环境需要设置否则失败连接

比如
cookies
url
...

import mitmproxy.http
from mitmproxy import ctx


class Counter:
    def __init__(self):
        self.num = 0

    def request(self, flow: mitmproxy.http.HTTPFlow):
        self.num = self.num + 1
        ctx.log.info("We've seen %d flows" % self.num)


addons = [
    Counter()
]

mitmdump -p 8080

mitmdump 
-p 指定端口号
-s 指定py脚本
-w 指定写入文件 默认将所有流量写入outfile

import mitmproxy.http # http处理模块
from mitmproxy import ctx # 日志模块

def request(flow):
    print("URL: \t"+flow.request.url)
    ctx.log.info(str(flow.request.headers)) # 请求头
    ctx.log.warn(str(flow.request.path))  

λ mitmdump -p 8080 -s main.py
Loading script main.py # 加载脚本
Proxy server listening at http://*:8080 #监听端口

127.0.0.1:14072: clientconnect
URL:    https://sug.so.360.cn/suggest?encodein=UTF-8&encodeout=UTF-8&format=opensearch&word=
Headers[(b'Host', b'sug.so.360.cn'), (b'Connection', b'keep-alive'), (b'Sec-Fetch-Site', b'none'), (b'Sec-Fetch-Mode', b'no-cors'), (b'User-Agent', b'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.117 Safari/537.36'), (b'Accept-Encoding', b'gzip, deflate, br'), (b'Accept-Language', b'zh,zh-CN;q=0.9,en;q=0.8'), (b'Cookie', b'__huid=110y7q8GOJVD4AeHprC/qVgeaKmeZo0r/0O1mg48NrWBQ=; __guid=209084363.1328179603006700032.1557537740001.3984; __gid=156009789.758223608.1572875073297.1572875076825.4; __DC_gid=156009789.758223608.1572875073297.1573629455750.9')]
/suggest?encodein=UTF-8&encodeout=UTF-8&format=opensearch&word=

127.0.0.1:14072: GET https://sug.so.360.cn/suggest?encodein=UTF-8&encodeout=UTF-8&format=opensearch&word=
              << 200 OK 7b
URL:    https://sug.so.360.cn/suggest?encodein=UTF-8&encodeout=UTF-8&format=opensearch&word=i
Headers[(b'Host', b'sug.so.360.cn'), (b'Connection', b'keep-alive'), (b'Sec-Fetch-Site', b'none'), (b'Sec-Fetch-Mode', b'no-cors'), (b'User-Agent', b'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.117 Safari/537.36'), (b'Accept-Encoding', b'gzip, deflate, br'), (b'Accept-Language', b'zh,zh-CN;q=0.9,en;q=0.8'), (b'Cookie', b'__huid=110y7q8GOJVD4AeHprC/qVgeaKmeZo0r/0O1mg48NrWBQ=; __guid=209084363.1328179603006700032.1557537740001.3984; __gid=156009789.758223608.1572875073297.1572875076825.4; __DC_gid=156009789.758223608.1572875073297.1573629455750.9')]
/suggest?encodein=UTF-8&encodeout=UTF-8&format=opensearch&word=i

from mitmproxy import ctx

ctx.log.info() // 白色
     ...warn() // 黄色
     ...error()// 红色

import mitmproxy.http
from mitmproxy import ctx # 日志模块

def request(flow):
    info = ctx.log.info
    request = flow.request
    print("\n\n+++++++++++++++++  开始  ++++++++++++++++++++++")
    info("URL: \t"+request.url)
    info("Headers: \t" + str(request.headers))
    info("Cookies: \t"+ str(request.cookies))
    info("Method: \t" + request.method)
    info("Port: \t"+ str(request.port))
    info("Scheme: \t" + request.scheme)
    print("+++++++++++++++++++++++++++++++++++++++\n\n")

URL: https://blog.itaolaity.com/usr/plugins/Mirages/biaoqing/paopao/E5A4A7E68B87E68C87_2x.png                                                          
Headers: Headers[(b'Host', b'blog.itaolaity.com'), (b'Connection', b'keep-alive')
Cookies: MultiDictView[['crisp-client%2Fsession%2F1e699570-3cf8-4358-a...                                                                                                               
Method: GET                                                                                                                                       
Port: 443                                                                                                                                               
Scheme: https                                                                                                                                  

import mitmproxy.http

def request(flow):
    url = 'https://blog.itaolaity.com/'
    if 'itaolaity.com' not in flow.request.url:
        flow.request.url = url

import mitmproxy.http

def request(flow):
    pass

def response(flow):
    response = flow.response
    print(response.status_code)
    print("响应内容： \t" + response.text)

def http_connect(self, flow: mitmproxy.http.HTTPFlow):

def requestheaders(self, flow: mitmproxy.http.HTTPFlow):

def response(self, flow: mitmproxy.http.HTTPFlow):

def error(self, flow: mitmproxy.http.HTTPFlow):

# 建立了一个 TCP 连接
def tcp_start(self, flow: mitmproxy.tcp.TCPFlow):

# TCP 连接收到了一条消息
def tcp_message(self, flow: mitmproxy.tcp.TCPFlow):

# 发生了 TCP 错误
def tcp_error(self, flow: mitmproxy.tcp.TCPFlow):

#  TCP 连接关闭
def tcp_end(self, flow: mitmproxy.tcp.TCPFlow):

def websocket_handshake(self, flow: mitmproxy.http.HTTPFlow):

def websocket_start(self, flow: mitmproxy.websocket.WebSocketFlow):

def websocket_message(self, flow: mitmproxy.websocket.WebSocketFlow):

def websocket_error(self, flow: mitmproxy.websocket.WebSocketFlow):

def websocket_end(self, flow: mitmproxy.websocket.WebSocketFlow):

#     客户端连接到了 mitmproxy。注意一条连接可能对应多个 HTTP 请求
def clientconnect(self, layer: mitmproxy.proxy.protocol.Layer):

# 客户端断开了和 mitmproxy 的连接
def clientdisconnect(self, layer: mitmproxy.proxy.protocol.Layer):

def serverconnect(self, conn: mitmproxy.connections.ServerConnection):

def serverdisconnect(self, conn: mitmproxy.connections.ServerConnection):

def next_layer(self, layer: mitmproxy.proxy.protocol.Layer):