python的端口转发

# -*- coding: utf-8 -*-
# tcp mapping

import sys
import socket
import logging
import threading

# 端口映射配置信息
CFG_REMOTE_IP = '127.0.0.1'
CFG_REMOTE_PORT = 23
CFG_LOCAL_IP = '0.0.0.0'
CFG_LOCAL_PORT = 1023

# 接收数据缓存大小
PKT_BUFF_SIZE = 2048

logger = logging.getLogger("Proxy Logging")
formatter = logging.Formatter('%(name)-12s %(asctime)s %(levelname)-8s %(lineno)-4d %(message)s',
                              '%Y %b %d %a %H:%M:%S', )

stream_handler = logging.StreamHandler(sys.stderr)
stream_handler.setFormatter(formatter)
logger.addHandler(stream_handler)

logger.setLevel(logging.DEBUG)


# 单向流数据传递
def tcp_mapping_worker(conn_receiver, conn_sender):
    while True:
        try:
            data = conn_receiver.recv(PKT_BUFF_SIZE)
        except Exception:
            logger.debug('Connection closed.')
            break

        if not data:
            logger.info('No more data is received.')
            break

        try:
            conn_sender.sendall(data)
        except Exception:
            logger.error('Failed sending data.')
            break

        # logger.info('Mapping data > %s ' % repr(data))
        logger.info(
            'Mapping > %s -> %s > %d bytes.' % (conn_receiver.getpeername(), conn_sender.getpeername(), len(data)))

    conn_receiver.close()
    conn_sender.close()

    return


# 端口映射请求处理
def tcp_mapping_request(local_conn, remote_ip, remote_port):
    remote_conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    try:
        remote_conn.connect((remote_ip, remote_port))
    except Exception:
        local_conn.close()
        logger.error('Unable to connect to the remote server.')
        return

    threading.Thread(target=tcp_mapping_worker, args=(local_conn, remote_conn)).start()
    threading.Thread(target=tcp_mapping_worker, args=(remote_conn, local_conn)).start()

    return


# 端口映射函数
def tcp_mapping(remote_ip, remote_port, local_ip, local_port):
    local_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    local_server.bind((local_ip, local_port))
    local_server.listen(5)

    logger.debug('Starting mapping service on ' + local_ip + ':' + str(local_port) + ' ...')

    while True:
        try:
            (local_conn, local_addr) = local_server.accept()
        except KeyboardInterrupt as Exception:
            local_server.close()
            logger.debug('Stop mapping service.')
            break

        threading.Thread(target=tcp_mapping_request, args=(local_conn, remote_ip, remote_port)).start()

        logger.debug('Receive mapping request from %s:%d.' % local_addr)

    return


# 主函数
if __name__ == '__main__':
    tcp_mapping(CFG_REMOTE_IP, CFG_REMOTE_PORT, CFG_LOCAL_IP, CFG_LOCAL_PORT)

pip使用国内源

1 国内源

清华:https://pypi.tuna.tsinghua.edu.cn/simple

阿里云:https://mirrors.aliyun.com/pypi/simple/

中国科技大学 https://pypi.mirrors.ustc.edu.cn/simple/

华中理工大学:http://pypi.hustunique.com/

山东理工大学:http://pypi.sdutlinux.org/

豆瓣:http://pypi.douban.com/simple/

需要注意的是新版ubuntu要求使用https源。

2 修改配置文件

Linux: 修改 ~/.pip/pip.conf (没有就创建一个文件夹及文件。文件夹要加“.”,表示是隐藏文件夹) MacOS: 修改 ~/.pip/pip.conf (没有就创建一个文件夹及文件。文件夹要加“.”,表示是隐藏文件夹) windows:,直接在user目录中创建一个pip目录,再新建文件pip.ini。例如:C:\Users\comet\pip\pip.ini

内容如下:

[global]

index-url = https://mirrors.aliyun.com/pypi/simple/

[install]

trusted-host=mirrors.aliyun.com

DHT22温湿度传感器的使用

使用python读取dht22温湿度传感器的值。

 import sys
 import Adafruit_DHT
 import requests
 import json
 url = 'https://www.3gcomet.com/iot/iot_receive.php'
 sensor = Adafruit_DHT.DHT22
 pin = 4
 humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
 if humidity is not None and temperature is not None:
     temp = '{:.1f}'.format(temperature)
     humi = '{:.1f}'.format(humidity)
     payload = {"ac":'iotofict',"loc":'CloudDC',"tem":temp,"hum":humi}
     response = requests.post(url=url,data=payload)
     print(response.text)
     #print('Temp={0:0.1f}*  Humidity={1:0.1f}%'.format(temperature, humidity))
 else:
     print('Failed to get reading. Try again!')
     sys.exit(1)

python读取串口信息

python读取配置文件中串口的名称,然后打开串口接受读卡器信息,再提交到某个网页上。

reader.ini:
[Default]
port=/dev/ttyUSB0

serial-test.py:

#!/usr/bin/python
import serial
import urllib2
import ConfigParser

def hexShow(argv):
    result = ''
    hLen = len(argv)
    for i in xrange(hLen):
        hvol = ord(argv[i])
        hhex = '%02x'%hvol
        result += hhex
#    print 'hexShow:',result
    return result

config = ConfigParser.ConfigParser()
config.readfp(open('reader.ini'))

sPort = config.get("Default","port")

ser = serial.Serial(sPort,9600)
while ser.isOpen():
    sdata = ser.read(5)
    cardid = hexShow(sdata)
#    print cardid
    cidurl = "http://127.0.0.1/cid.php?cid="+cardid

    res_data = urllib2.urlopen(cidurl)
    res = res_data.read()
    print res