Python设置Socket代理及实现远程摄像头控制的例子

为python设置socket代理
首先,你得下载SocksiPy这个.解压出来之后里面会有一个socks.py文件.然后你可以把这个文件复制到python安装目录里面的Lib\site-packages中.或者把这个文件复制到程序所在的目录中.
然后就可以再程序中使用socket代理来编写程序了.
下面是示例代码

    import socks
    import socket
    socks.setdefaultproxy(socks.PROXY_TYPE_SOCKS5,"127.0.0.1",8088)
    socket.socket =socks.socksocket
    import urllib2
    urllib2.urlopen('http://www.baidu.com').read()

通过socket通信实现远程摄像头监控
通过python来实现摄像头监控,然后通过socket通信来将数据发送到远程服务器,这样就可以实现远程监控了.大概找了下资料,果然可以,下面贴出实现过程.
这个程序包括一个服务器和一个客户端。需要的库有 VideoCapture 和 pygame，一个用来得到摄像头的视频，一个用来显示.
服务器端,主要实现监听客户端所发送到指令,如果指令是startCam,则打开摄像头,并向客户端发送数据.

    from VideoCapture import Device
    import ImageDraw, sys, pygame, time
    from pygame.locals import *
    import socket
    import time
    from PIL import ImageEnhance
    from threading import Thread
    import traceback
    import threading





    # 全局变量
    is_sending = False
    cli_address = ('', 0)

    # 主机地址和端口
    host = 'localhost'
    port = 10218

    # 初始化UDP socket
    ser_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    ser_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    ser_socket.bind((host, port))

    # 接收线程类，用于接收客户端发送的消息
    class UdpReceiver(threading.Thread):
      def __init__(self):
        threading.Thread.__init__(self)
        self.thread_stop = False

      def run(self):
        while not self.thread_stop:
          # 声明全局变量，接收消息后更改
          global cli_address  
          global is_sending
          try:
            message, address = ser_socket.recvfrom(2048)
          except:
            traceback.print_exc()
            continue
          print message,cli_address
          cli_address = address
          if message == 'startCam':
            print 'start camera',
            is_sending = True
            ser_socket.sendto('startRcv', cli_address)        
          if message == 'quitCam':
            is_sending = False
            print 'quit camera',

      def stop(self):
        self.thread_stop = True


    if __name__=='__main__':
      res = (640,480)

      cam = Device()
      cam.setResolution(res[0],res[1])


      brightness = 1.0
      contrast = 1.0
      shots = 0

      receiveThread = UdpReceiver()
      receiveThread.setDaemon(True)      # 该选项设置后使得主线程退出后子线程同时退出
      receiveThread.start()


      while 1:
        if is_sending: 
          camshot = ImageEnhance.Brightness(cam.getImage()).enhance(brightness)
          camshot = ImageEnhance.Contrast(camshot).enhance(contrast)
          clock = pygame.time.Clock()
          img = cam.getImage().resize((160,120))
          data = img.tostring()
          ser_socket.sendto(data, cli_address) 
          time.sleep(0.05) 
        else:
          time.sleep(1)
      receiveThread.stop()
      ser_socket.close()    

客户端:
主要功能是像服务器端发送指令,然后接受服务器所发送过来的数据并通过pygame模块来显示出来.

    # -*- coding: UTF-8 -*-

    import socket, time
    import pygame
    from pygame.locals import *
    from sys import exit

    # 服务器地址，初始化socket
    ser_address = ('localhost', 10218)
    cli_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

    # 设置超时
    cli_socket.settimeout(5)

    # 向服务器发送消息，并判断接收时是否超时，若超时则重发
    while 1:
      cli_socket.sendto('startCam', ser_address)
      try:
        message, address = cli_socket.recvfrom(2048)
        if message == 'startRcv':
          print message
          break
      except socket.timeout:
        continue

    cli_socket.recvfrom(65536)

    # 初始化视频窗口
    pygame.init()
    screen = pygame.display.set_mode((640,480))
    pygame.display.set_caption('Web Camera')
    pygame.display.flip()

    # 设置时间，可以用来控制帧率
    clock = pygame.time.Clock()


    # 主循环，显示视频信息
    while 1:
      try:
        data, address = cli_socket.recvfrom(65536)
      except socket.timeout:
        continue
      camshot = pygame.image.frombuffer(data, (160,120), 'RGB')
      camshot = pygame.transform.scale(camshot, (640, 480))
      for event in pygame.event.get():
        if event.type == pygame.QUIT:
          cli_socket.sendto('quitCam', ser_address)
          cli_socket.close()
          pygame.quit()
          exit()
      screen.blit(camshot, (0,0))
      pygame.display.update() 
      clock.tick(20)

客户端就是简单地向服务器发送启动消息，接收到回复后开始进入主循环开始接收视频数据并显示。
由于UDP协议不保证信息是否成功到达，因此前面设置了个重发机制，只有当客户端收到服务器的回复后，才停止发送开启消息并进入主循环.具体见注释.
使用时将localhost改成服务器IP即可.