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Python Try Catch Socket.error

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[5]), int(self.server.protocol[7]) if sp[0] != rp[0]: 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.

  1. Also, is it okay to exit programs using sys.exit when an unwanted exception occurs?
  2. Heres my code import socket import sys import struct class ARToolkit(): def __init__(self): self.x = 0 self.y = 0 self.z = 0 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.logging = False def connect(self,server_address):
  3. In most cases, only those symbols that are defined in the Unix header files are defined; for a few symbols, default values are provided.
  4. Example 1 From project eventlet, under directory eventlet, in source file util.py.
  5. The optional flags argument has the same meaning as for recv() above.
  6. socket.proto¶ The socket protocol.
  7. Will try to use any free port for debugging' % self.jpda_port self.jpda_port = 0 Example 24 From project play1, under directory python/Lib/logging, in source file handlers.py.
  8. current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list.
  9. New in version 2.3.

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[0] if response = e[1] ... 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

except ssh.BadHostKeyException: abort("Host key for %s did not match pre-existing key!

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[0] 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.