我想制作一个程序,用于从文件访问图像,对它们进行编码并将它们发送到服务器。 比服务器应该解码图像,并将其保存到文件。 我测试了图像编码本身,它工作,所以问题在于服务器和客户端连接。Python错误:“socket.error:[Errno 11]资源暂时不可用”发送图像时
这里是服务器:
import socket
import errno
import base64
from PIL import Image
import StringIO
def connect(c):
try:
image = c.recv(8192)
return image
except IOError as e:
if e.errno == errno.EWOULDBLOCK:
connect(c)
def Main():
host = '138.106.180.21'
port = 12345
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_TCP)
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
s.bind((host, port))
s.listen(1)
while True:
c, addr = s.accept()
c.setblocking(0)
print "Connection from: " + str(addr)
image = c.recv(8192)#connect(c)
imgname = 'test.png'
fh = open(imgname, "wb")
if image == 'cusdom_image':
with open('images.png', "rb") as imageFile:
image = ''
image = base64.b64encode(imageFile.read())
print image
fh.write(image.decode('base64'))
fh.close()
if __name__ == '__main__':
Main()
这里是客户端:
import socket
import base64
from PIL import Image
import StringIO
import os, sys
ip = '138.106.180.21'
port = 12345
print 'Add event executed'
s = socket.socket()
s.connect((ip, port))
image_path = '/home/gilgamesch/Bilder/Bildschirmfoto.png'
print os.getcwd()
olddir = os.getcwd()
os.chdir('/')
print os.getcwd()
if image_path != '':
with open(image_path, "rb") as imageFile:
image_data = base64.b64encode(imageFile.read())
print 'open worked'
else:
image_data = 'cusdom_image'
os.chdir(olddir)
s.send(image_data)
s.close()
和错误消息是:
Traceback (most recent call last):
File "imgserv.py", line 49, in <module>
Main()
File "imgserv.py", line 34, in Main
image = c.recv(8192)#connect(c)
socket.error: [Errno 11] Resource temporarily unavailable
但我该怎么做,如果服务器应该得到多个连接? –
这是另一个问题。您可以使用'select()'来确定多个套接字中的哪一个准备好读取,然后在那些套接字上调用'recv()'。您还可以将主服务器套接字添加到传递给'select()'的套接字列表中,只要select()指示它可读,就调用该套接字上的accept。在'select'模块中还有其他的选择,比如'poll()'et。人。 – mhawke
您也可以考虑使用['selectors'](https://docs.python.org/3/library/selectors.html#module-selectors)模块或['asyncio'](https://docs.python .org/3/library/asyncio.html#module-asyncio)如果您使用Python 3.4或更高版本。 ['asyncore'](https://docs.python.org/2.7/library/asyncore.html#module-asyncore)是Python 2的一个选项。 – mhawke