python服务程序（调用摄像头查看视频和识别二维码）+ Android 客户端程序
运行效果图
服务器端程序
#!/usr/bin/python
'''
服务器端程序 do_GET() 方法调用webcam摄像头，查看监控视频，同时识别二维码，do_POST()方法连接Mysql数据库，获取数据，并以webservice的形式发布出去供移动客户端与Mysql数据交互。
'''
import cv2
import Image
import threading
from BaseHTTPServer import BaseHTTPRequestHandler,HTTPServer
from SocketServer import ThreadingMixIn
import StringIO
import time
import qrtools
import serial
import MySQLdb
import datetime
import cgi
import random
import string
capture = None
qr = qrtools.QR()
sr = serial.Serial('/dev/ttyACM0', baudrate=9600, timeout=1)
db = MySQLdb.connect('localhost', 'root', 'root', 'homedb')
cursor = db.cursor()
def passwd_generator():
s = string.ascii_letters + string.digits
l = len(s)
passwd_l = 10
return ''.join([s[random.randrange(0, l-1)] for x in range(passwd_l)])
class CamHandler(BaseHTTPRequestHandler):
def do_GET(self):
if self.path.endswith('.mjpg'):
self.send_response(200)
self.send_header('Content-type','multipart/x-mixed-replace; boundary=--jpgboundary')
self.end_headers()
while True:
try:
rc, img = capture.read()
if not rc:
continue
imgRGB = cv2.cvtColor(img,cv2.COLOR_BGR2RGB)
jpg = Image.fromarray(imgRGB)
tmpFile = StringIO.StringIO()
jpg.save(tmpFile,'JPEG')
if qr.decode(tmpFile):
print(qr.data)
''' Verify QR code '''
username, passwd = qr.data.trim().split(',')
cursor.execute('select * from user where username="' + qr.username + '"')
data = cursor.fetchone()
if not data:
continue
d = datetime.datetime.now() - data[3]
if d < datetime.delta(seconds=10):
if passwd == data[2]:
''' Open lock via arduino'''
if sr.isOpen():
sr.write(b'1')
self.wfile.write("--jpgboundary")
self.send_header('Content-type','image/jpeg')
self.send_header('Content-length',str(tmpFile.len))
self.end_headers()
jpg.save(self.wfile,'JPEG')
time.sleep(0.05)
except KeyboardInterrupt:
break
return
if self.path.endswith('.html'):
self.send_response(200)
self.send_header('Content-type','text/html')
self.end_headers()
with open('front.html', 'r') as f:
self.wfile.write(f.read());
# self.wfile.write('')
self.wfile.write('
')
# self.wfile.write('')
with open('end.html', 'r') as f:
self.wfile.write(f.read())
return
def do_POST(self):
if self.path == '/authenticate':
ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
if ctype == 'multipart/form-data':
postvars = cgi.parse_multipart(self.rfile, pdict)
elif ctype == 'application/x-www-form-urlencoded':
length = int(self.headers.getheader('content-length'))
postvars = cgi.parse_qs(self.rfile.read(length), keep_blank_values=1)
else:
postvars = {}
if postvars:
username = postvars['username'][0]
print("username=" + username)
cursor.execute('select * from user where username=%s', (username, ))
d = cursor.fetchone()
if d:
new_passwd = passwd_generator()
print("new passwd=" + new_passwd)
# cursor.execute('select * from user')
cursor.execute('update user set passwd=%s, last_update=%s where username=%s', (new_passwd, datetime.datetime.now(), username))
db.commit()
if cursor:
self.send_response(200)
self.end_headers()
self.wfile.write(username + ',' + new_passwd)
print("response OK!")
return
else:
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
self.wfile.write('Hello world