rattail-project/rattail Changeset

Changeset - 4d9fa6c34559

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Lance Edgar (lance) - 12 years ago 2012-11-09 11:42:35
lance@edbob.org

add timeout support to CommandNetworkPrinter

1 file changed with 18 insertions and 6 deletions:

rattail/labels.py

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rattail/labels.py

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@@ @@ -143,23 +143,25 @@ class CommandFilePrinter(CommandPrinter): @@
 # Force ordering for network printer required settings.
 settings = OrderedDict()
 settings['address'] = "IP Address"
 settings['port'] = "Port"
 settings['timeout'] = "Timeout"
 class CommandNetworkPrinter(CommandPrinter):
     """
     Generic :class:`LabelPrinter` implementation which "prints" labels to a
     network socket in the form of native printer (textual) commands.  The
     socket is assumed to exist on a networked label printer.
     """
     required_settings = settings
     address = None
     port = None
     timeout = None
     def print_labels(self, labels, progress=None):
         """
         Prints ``labels`` by generating commands and sending directly to a
         socket which exists on a networked printer.
         """
@@ @@ -182,18 +184,28 @@ class CommandNetworkPrinter(CommandPrinter): @@
         data.write(commands)
         footer = self.batch_footer_commands()
         if footer:
             data.write('%s\n' % '\n'.join(footer))
         # Must pass byte-strings (not unicode) to this function.
         sock = socket.create_connection((str(self.address), str(self.port)))
         bytes = sock.send(data.getvalue())
         sock.close()
         data.close()
         return bytes
         try:
             timeout = int(self.timeout)
         except ValueError:
             timeout = socket.getdefaulttimeout()
         try:
             # Must pass byte-strings (not unicode) to this function.
             sock = socket.create_connection((str(self.address), str(self.port)), timeout)
         except socket.timeout:
             raise LabelPrintingError("Can't communicate with printer.")
         else:
             bytes = sock.send(data.getvalue())
             sock.close()
             return bytes
         finally:
             data.close()
 class LabelFormatter(edbob.Object):
     """
     Base class for all label formatters.
     """

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