Python网络编程测试－socket初探

Python网络编程测试－socket初探

由于项目需要很多数据，虽然网上有些研究中心发布的数据库，但是都要收费，对于我这种三无人员来说简直是奢侈。

（一个人脸识别的数据库要1000刀！WTF！）

 

慢慢试着自己开发一个搜索工具吧。。。

 

先测试一个socket小小功能函数吧（非常小，高手就路过吧。。。）

[python] #testint of sending infomation to www.2cto.com  
 
import sys , socket , time 
 
host = sys.argv[1] 
xport = sys.argv[2] 
filename = sys.argv[3] 
 
print('getting socket...') 
 
try: 
  s = socket.socket(socket.AF_INET , socket.SOCK_STREAM) 
except socket.error , e: 
  print('here is a error: %s') % e 
  sys.exit(1) 
 
print('done') 
print('getting socket port') 
 
try: 
  port = int(xport) 
except ValueError: 
  try: 
    port = socket.getprotobyname(xport , 'tcp') 
  except socket.error , e: 
    print('here is an error happened: %s') % e 
    sys.exit(1) 
 
print('done') 
print('connecting the host') 
 
try: 
  s.connect((host , port)) 
except socket.gaierror , e: 
  print('here is an error happened: %s') % e 
  sys.exit(1) 
except socket.error , e: 
  print('here is an error happened: %s') % e 
  sys.exit(1) 
 
print('done') 
 
print('sleeping...') 
time.sleep(3) 
print('connecting...') 
 
try: 
  s.sendall('GET %s HTTP/1.0\r\n\r\n' % filename) 
 
except socket.error , e: 
  print('here is an error happened: %s') % e 
  sys.exit(1) 
 
try: 
  s.shutdown(1) 
except socket.error , e: 
  print('here is an error happened: %s') % e 
  sys.exit(1) 
 
while True: 
  try: 
    buf = s.recv(64) 
  except socket.error , e: 
    print('here is an error happened: %s') % e 
    sys.exit(1) 
 
    if not len(buf): 
      break 
    sys.stdout.write(buf) 
#testint of sending infomation to www.2cto.com

import sys , socket , time

host = sys.argv[1]
xport = sys.argv[2]
filename = sys.argv[3]

print('getting socket...')

try:
  s = socket.socket(socket.AF_INET , socket.SOCK_STREAM)
except socket.error , e:
  print('here is a error: %s') % e
  sys.exit(1)

print('done')
print('getting socket port')

try:
  port = int(xport)
except ValueError:
  try:
 port = socket.getprotobyname(xport , 'tcp')
  except socket.error , e:
   print('here is an error happened: %s') % e
 sys.exit(1)

print('done')
print('connecting the host')

try:
  s.connect((host , port))
except socket.gaierror , e:
  print('here is an error happened: %s') % e
  sys.exit(1)
except socket.error , e:
  print('here is an error happened: %s') % e
  sys.exit(1)

print('done')

print('sleeping...')
time.sleep(3)
print('connecting...')

try:
  s.sendall('GET %s HTTP/1.0\r\n\r\n' % filename)

except socket.error , e:
  print('here is an error happened: %s') % e
  sys.exit(1)

try:
  s.shutdown(1)
except socket.error , e:
  print('here is an error happened: %s') % e
  sys.exit(1)

while True:
  try:
 buf = s.recv(64)
  except socket.error , e:
 print('here is an error happened: %s') % e
 sys.exit(1)

 if not len(buf):
   break
 sys.stdout.write(buf)

 

 

Python的socket模块（2.6版本，3.2的还没试，估计差不多）定义了4种可能出现的错误：

1 与一般IO和通信问题相关：socket.error

2 与查询地址信息相关：socket.gaierror

3 与其他地址错误相关：socket.herror

4 与在一个socket上调用settimeout()后，处理超时相关： socket.timeout

 

上面的code有个重大问题，那就是没有将socket关闭，因为要测试socket模块shutdown函数（因为如果程序设计不当，shutdown函数会引发一些问题）,最后加上这个代码段就可以了

[python] try: 
  s.shutdown(1) 
except socket.error , e: 
  print('here is an error: %s') % e 
  sys.exit(1) 
try:
  s.shutdown(1)
except socket.error , e:
  print('here is an error: %s') % e
  sys.exit(1)

lol

 

 

摘自 FishinLab的专栏