如何知道socket是否仍然连接 [英] how to know if socket is still connected
问题描述
lo那里，
i有一个简单的应用程序连接到套接字以从服务器获取信息
i看起来像这样
serverhost =''xxx.xxx.xxx.xxx''
serverport = 9520
aeris_sockobj = socket.socket（socket.AF_INET，socket。 SOCK_STREAM）
aeris_sockobj.connect（（serverhost，serverport））
而1：
用套接字做这个或那个，
发送和接收信息。
yadda yadda yadda
效果很好，但有时服务器会断开连接。
所以，我需要的东西会让我知道如果连接
仍然可以，如果没有将重新连接。
我的想法，因为它只允许你在一个特定的端口连接一个
a时间，
我可以尝试使用 - 除非连接每次，如果它不能
connect（因为它已经是）然后我会继续。但如果
没有连接，它会重新连接。
这就是我带来的地方。看起来它会起作用，但是有更好的方式吗？这有点似乎是一个肮脏的黑客。
任何意见？
谢谢。
lo there,
i have a simple app that connects to a socket to get info from a server
i looks like this
serverhost = ''xxx.xxx.xxx.xxx''
serverport = 9520
aeris_sockobj = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
aeris_sockobj.connect((serverhost,serverport))
while 1:
do this or that with socket,
send and receive info.
yadda yadda yadda
works well, but sometimes the server drops the connection.
so, what i need is something that will let me know if the connection
is still ok, if not will reconnect.
what i thought, since it only lets you connect on a certain port one at
a time,
that i could use a try-except to connect every time, if it could not
connect (because it already is) then i would just continue on. But if
it is not connected, it would reconnect.
that is what brings me here. Seems like it would work, but is there a
better way ? this kinda seems like a dirty hack.
any opinions ?
thanks.
推荐答案
2006-07-16， ne ***** @ xit.net < ne ***** @ xit.netwrote：
On 2006-07-16, ne*****@xit.net <ne*****@xit.netwrote:
serverhost =''xxx.xxx.xxx.xxx''
serverport = 9520
aeris_sockobj = socket.socket（socket.AF_INET，socket.SOCK_STREAM）
aeris_sockobj.connect（（serverhost，serverport））
而1：
用插座做这个或那个，
发送和接收信息。
yadda yadda yadda
运行良好，但有时服务器会断开连接。所以，
我需要的东西会让我知道如果
连接仍然可以，如果没有将重新连接。
serverhost = ''xxx.xxx.xxx.xxx''
serverport = 9520
aeris_sockobj = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
aeris_sockobj.connect((serverhost,serverport))
while 1:
do this or that with socket,
send and receive info.
yadda yadda yadda
works well, but sometimes the server drops the connection. so,
what i need is something that will let me know if the
connection is still ok, if not will reconnect.
如果服务器已关闭连接，那么
套接字上的recv（）将返回一个空字符串"，
套接字上的send（）会引发异常。
If the server has closed the connection, then a recv() on the
socket will return an empty string "", and a send() on the
socket will raise an exception.
我的想法，因为它只允许你连接某个
一次一个端口，我可以尝试使用 - 每次连接
，如果它无法连接（因为它已经是）
然后我会继续。但是如果它没有连接，它将重新连接
。这就是我在这里的原因。好像它好像b $ b会起作用，但还有更好的方法吗？
what i thought, since it only lets you connect on a certain
port one at a time, that i could use a try-except to connect
every time, if it could not connect (because it already is)
then i would just continue on. But if it is not connected, it
would reconnect. that is what brings me here. Seems like it
would work, but is there a better way?
我不明白为什么普通的send（）和recv（）语义不足以让b
足够。
-
格兰特爱德华兹格兰特哇！我是东区
在TYPE ...
visi.com
I don''t see why the normal send() and recv() semantics aren''t
sufficient.
--
Grant Edwards grante Yow! I''m an East Side
at TYPE...
visi.com
Grant Edwards写道：
Grant Edwards wrote:
2006-07-16， ne*****@xit.net < ne ***** @ xit.netwrote：
On 2006-07-16, ne*****@xit.net <ne*****@xit.netwrote:
serverhost =''xxx.xxx .xxx.xxx''
serverport = 9520
aeris_sockobj = socket.socket（socket.AF_INET，socket.SOCK_STREAM）
aeris_sockobj.connect （（serverhost，serverport））
而1：
执行此操作或使用套接字，
发送和接收信息。
yadda yadda yadda
效果很好，但有时服务器会断开连接。所以，
我需要的东西会让我知道如果
连接仍然可以，如果没有将重新连接。
serverhost = ''xxx.xxx.xxx.xxx''
serverport = 9520
aeris_sockobj = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
aeris_sockobj.connect((serverhost,serverport))
while 1:
do this or that with socket,
send and receive info.
yadda yadda yadda
works well, but sometimes the server drops the connection. so,
what i need is something that will let me know if the
connection is still ok, if not will reconnect.
如果服务器已关闭连接，那么
套接字上的recv（）将返回一个空字符串"，
套接字上的send（）会引发异常。
If the server has closed the connection, then a recv() on the
socket will return an empty string "", and a send() on the
socket will raise an exception.
我的想法，因为它只允许你连接某个
一次一个端口，我可以尝试使用 - 每次连接
，如果它无法连接（因为它已经是）
然后我会继续。但是如果它没有连接，它将重新连接
。这就是我在这里的原因。好像它好像b $ b会起作用，但还有更好的方法吗？
what i thought, since it only lets you connect on a certain
port one at a time, that i could use a try-except to connect
every time, if it could not connect (because it already is)
then i would just continue on. But if it is not connected, it
would reconnect. that is what brings me here. Seems like it
would work, but is there a better way?
我不明白为什么普通的send（）和recv（）语义不足以让b $ b足够。
-
格兰特爱德华兹格兰特哇！我是东区
在TYPE ...
visi.com
I don''t see why the normal send() and recv() semantics aren''t
sufficient.
--
Grant Edwards grante Yow! I''m an East Side
at TYPE...
visi.com
这样吗？
databack = aeris_sockobj.recv（2048）
如果databack：
view_msg =''抓住请求确认％s字节\\ \\ n'％
len（databack）
else：
view_msg =''未能从aeris server \ n'接收数据'
然后把重新连接放在else：block？
谢谢
谢谢
like this ?
databack = aeris_sockobj.recv(2048)
if databack:
view_msg = ''caught request acknowlage %s bytes \n'' %
len(databack)
else:
view_msg = ''fail to recieve data from aeris server\n''
then put the reconnect in the else: block ?
thanks
thanks
2006-07-16， ne*****@xit.net < ne ***** @ xit.netwrote：
On 2006-07-16, ne*****@xit.net <ne*****@xit.netwrote:
>如果服务器已关闭连接，然后
套接字上的recv（）将返回一个空字符串"，
套接字上的send（）将引发异常。
>If the server has closed the connection, then a recv() on the
socket will return an empty string "", and a send() on the
socket will raise an exception.
是这样的吗？
databack = aeris_sockobj.recv（2048）
如果数据包：
view_msg =''捕获请求确认％s字节\ n''％
len（数据包）
else：
view_msg =''未能从aeris服务器接收数据\ n'
然后将重新连接放入else：block？
like this ?
databack = aeris_sockobj.recv(2048)
if databack:
view_msg = ''caught request acknowlage %s bytes \n'' %
len(databack)
else:
view_msg = ''fail to recieve data from aeris server\n''
then put the reconnect in the else: block ?
是的，如果问题是主机关闭连接，那么应该有效的
。模压破损的缩进和
换行。 ;）
-
格兰特爱德华兹格兰特哇！我的意思是土豆
现场......
visi.com
Yes, if the problem is that the host closes the connection,
that should work. Modulo the broken indentation and
line-wrapping. ;)
--
Grant Edwards grante Yow! My mind is a potato
at field...
visi.com
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