Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I assume the problems you're having is the following, you're opening a connection using PyOpenSSL and you always get a WantReadError exception. And you can't distinguish between this error and a timeout. Consider the following example:</p> <pre><code>#!/usr/bin/python import OpenSSL import socket import struct context = OpenSSL.SSL.Context(OpenSSL.SSL.TLSv1_METHOD) s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) connection = OpenSSL.SSL.Connection(context,s) connection.connect(("www.gmail.com",443)) # Put the socket in blocking mode connection.setblocking(1) # Set the timeout using the setsockopt tv = struct.pack('ii', int(6), int(0)) connection.setsockopt(socket.SOL_SOCKET, socket.SO_RCVTIMEO, tv) print "Connected to " , connection.getpeername() print "Sate " , connection.state_string() while True: try: connection.do_handshake() break except OpenSSL.SSL.WantReadError: print "Exception" pass print "Sate " , connection.state_string() print connection.send("koekoek\r\n") while True: try: recvstr = connection.recv(1024) break except OpenSSL.SSL.WantReadError: print "Exception" pass print recvstr </code></pre> <p>This will open an SSL connection to gmail, send an invalid string, read the response and print it. Note that: * the connection is explicitely set to blocking-mode * the recv timeout is explicitely set to in this case 6 seconds.</p> <p>Now what will the behavior be, when the timeout occurs, the WantReadError exception will be thornw, in this case after waiting for 6 seconds. (You can remove the while True to avoid the retry, but in this case i added them for testing). The timeout set on the socket only appears to be effective in the connect() call. </p> <p>An alternative would be when keeping the sockets in non-blocking mode which probably applies for the GNUTLS case as well is to perform the timekeeping yourself, you get the time when you launch the call, and in the while True, try: except WantReadError you perform the check every time yourself to see if you haven't been waiting for too long.</p>
    singulars
    1. This table or related slice is empty.
    1. POTLS connection with timeouts (and a few other difficulties)
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USamo-ej1
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COBut isn't it some sort of busy wait, quite costly for the processor?
      singulars
      1. PO
      1. USbortzmeyer
    2. COYou can always insert a sleep, yield the scheduler, or do something else.And it's not as if you spend a long period in the loop, nice servers try to respond quite fast.
      singulars
      1. PO
      1. USamo-ej1
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload