Why don't browser DNS caches mitigate DDOS attacks on DNS providers? Note that there are no methods read() or write(); use recv() and send() without flags argument instead. Score: 10 def _cleanup_ports(bound_addresses, maxtries=30, sleeptime=2): # Wait for the server to bind to the port. Addresses are represented by a tuple, and the fields depend on the address type. http://caribtechsxm.com/python-try/python-try-catch-any-error.php
The optional flags argument has the same meaning as for recv() above. socket.ntohs(x)¶ Convert 16-bit positive integers from network to host byte order. self.wsgi_write_data(" ") return do_POST = run_wsgi_app do_PUT = run_wsgi_app do_DELETE = run_wsgi_app def do_GET(self): if self.path.startswith('/static/'): SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self) else: self.run_wsgi_app() def wsgi_start_response(self, response_status, response_headers, exc_info=None): if (self.wsgi_sent_headers): raise Exception \ ("Headers already Socket objects also have these (read-only) attributes that correspond to the values given to the socket constructor.
raise # (10048, 'Address already in use') # assert count <= 2 # never triggered in Tim's tests if count >= 10: # I've never seen it go above 2 a.close() exception socket.timeout¶ This exception is raised when a timeout occurs on a socket which has had timeouts enabled via a prior call to settimeout(). python sockets exception exception-handling share|improve this question asked Mar 1 '11 at 22:25 AustinM 26041224 add a comment| 3 Answers 3 active oldest votes up vote 23 down vote accepted If
Only one process is allowed to bind to each port; if this port is already being used then an exception is raised. Changed in version 2.7: source_address was added. This is a higher-level function than socket.connect(): if host is a non-numeric hostname, it will try to resolve it for both AF_INET and AF_INET6, and then try to If you get another kind of exception than a socket.error, it's likely that you end up with an IndexError. (It doesn't have to be a mistyping in your code that causes
socket.gethostbyname_ex(hostname)¶ Translate a host name to IPv4 address format, extended interface. New in version 2.4. RFC 2616 10.5.6 says we should # only return 505 if the _major_ version is different. http://ilab.cs.byu.edu/python/socket/exceptions.html sp = int(self.server.protocol), int(self.server.protocol) if sp != rp: self.simple_response("505 HTTP Version Not Supported") return self.request_protocol = req_protocol self.response_protocol = "HTTP/%s.%s" % min(rp, sp) Example 50 From project Ramona-St., under directory ramonast/library/web,
While coding Java, I am constantly thinking about class design, exception handling, patterns, etc. Score: 10 def createSocket(self): """ Try to create a socket, using an exponential backoff with a max retry time. Antsy permutations Does the code terminate? Browse other questions tagged python sockets exception or ask your own question.
from socket import * pulls in the definitions of everything inside of socket but doesn't add socket itself. http://stackoverflow.com/questions/11865685/handling-a-timeout-error-in-python-sockets asked 3 years ago viewed 32092 times active 2 years ago Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Linked 2 Errno 61 connection refused for UDP client If host or port are ‘' or 0 respectively the OS default behavior will be used. Run the original server twice if you want to see what happens when the exception is not caught.
if self.retryTime is None: self.retryPeriod = self.retryStart else: self.retryPeriod = self.retryPeriod * self.retryFactor if self.retryPeriod > self.retryMax: self.retryPeriod = self.retryMax self.retryTime = now + self.retryPeriod Example 25 From project play1, under More about the author file = tempfile.mktemp(".ini") f = open(file, "w") f.write(chunk) f.close() try: fileConfig(file) except (KeyboardInterrupt, SystemExit): raise except: traceback.print_exc() os.remove(file) except socket.error, e: if type(e.args) != types.TupleType: raise else: errcode = e.args if response = e ... Created using Sphinx 1.3.3.
Python doesn't feel like other programming languages. self.ready = False return if request_line == "\r\n": # RFC 2616 sec 4.1: "...if the server is reading the protocol # stream at the beginning of a message and receives a Score: 10 def socket_exception(func): "Decorator close object on socket.error." def read(self, *args, **kwargs): try: return func(self, *args, **kwargs) except socket.error: self.close() return read Example 29 From project indextank-service, under directory storefront/boto/manage, http://caribtechsxm.com/python-try/python-catch-error.php This is useful with select.select().
Be careful. up vote 17 down vote favorite 3 Hey I'm wondering how to handle specific error codes. Or, better yet, use the errno.ECONNREFUSED constant instead: import errno from socket import error as socket_error try: senderSocket.send('Hello') except socket_error as serr: if serr.errno != errno.ECONNREFUSED: # Not the error we
I using Python 2.6.5 . –URL87 Jan 20 '13 at 14:32 1 @URL87: Did you do from socket import socket? On machines where the host byte order is the same as network byte order, this is a no-op; otherwise, it performs a 2-byte swap operation. By default, if no explicit timeout is set for the socket, it will block while doing so and eventually timeout, raising exception socket.error: [Errno 110] Connection timed out. asked 2 years ago viewed 17697 times active 2 years ago Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Linked 1 When will a blocking socket timeout?
except Exception, e: ... For AF_INET6 address family, a four-tuple (host, port, flowinfo, scopeid) is used, where flowinfo and scopeid represents sin6_flowinfo and sin6_scope_id member in struct New in version 2.6. http://caribtechsxm.com/python-try/python-catch-error-messages.php Returns a Thread object on which you can call start() to start the server, and which you can join() when appropriate.
socket.accept()¶ Accept a connection. For example, AI_NUMERICHOST will disable domain name resolution and will raise an error if host is a domain name. The address family should be AF_INET (the default), AF_INET6 or AF_UNIX. How to remove screws from old decking Nested apply function at a list "There is no well-ordered uncountable set of real numbers" Can anyone identify the city in this photo?
if e.__class__ is ssh.SSHException and password: abort(str(e)) # Otherwise, assume an auth exception, and prompt for new/better # password. # Paramiko doesn't handle prompting for locked private keys (i.e. # keys Suggestion error with Coveo search box How much are taxes for a postdoc in the United States? The constants are used as arguments to the ioctl() method of socket objects. Make sure you know what you are doing." print '*' * 70 # first use provided values, if none, use loaded values, # if none use defaults nb = notebook.load_notebook(directory) directory
How does break enchantment work on stone shaped wall? "There is no well-ordered uncountable set of real numbers" How to flood the entire lunar surfaces? share|improve this answer edited Mar 1 '11 at 23:07 answered Mar 1 '11 at 22:40 jchl 3,3681745 3 Using e.errno instead of e.args is usually preferred (for exceptions that use For example, [Errno 111] Connection refused I want to catch this specific error in the socket module and print something. self.ready = False return if request_line == CRLF: # RFC 2616 sec 4.1: "...if the server is reading the protocol # stream at the beginning of a message and receives a
In the latter case it is up to the caller to ensure that the string contains the proper bits (see the optional built-in module struct for a way to encode If no port is found, raise a RuntimeError exception. The return value is a pair (nbytes, address) where nbytes is the number of bytes received and address is the address of the socket sending the data. This is because common variable names in 2 or more modules that are imported in this way will clobber one another.
Join them; it only takes a minute: Sign up Python handling specific error codes? For Unix, refer to the manual pages; for Windows, see the WinSock (or Winsock 2) specification. Updated the answer to use a middle ground. –Martijn Pieters♦ Jan 20 '13 at 15:15 3 FYI, If using Python 3.3 it now has ConnectionRefusedError and socket.error is deprecated. –Mark If a float is given, subsequent socket operations will raise a timeout exception if the timeout period value has elapsed before the operation has completed.