| 69 | |
| 70 | # the following code is taken from http://code.activestate.com/recipes/440554-module-to-allow-asynchronous-subprocess-use-on-win/ |
| 71 | class Popen(subprocess.Popen): |
| 72 | def recv(self, maxsize=None): |
| 73 | return self._recv('stdout', maxsize) |
| 74 | |
| 75 | def recv_err(self, maxsize=None): |
| 76 | return self._recv('stderr', maxsize) |
| 77 | |
| 78 | def send_recv(self, input='', maxsize=None): |
| 79 | return self.send(input), self.recv(maxsize), self.recv_err(maxsize) |
| 80 | |
| 81 | def get_conn_maxsize(self, which, maxsize): |
| 82 | if maxsize is None: |
| 83 | maxsize = 1024 |
| 84 | elif maxsize < 1: |
| 85 | maxsize = 1 |
| 86 | return getattr(self, which), maxsize |
| 87 | |
| 88 | def _close(self, which): |
| 89 | getattr(self, which).close() |
| 90 | setattr(self, which, None) |
| 91 | |
| 92 | if IS_WIN: |
| 93 | def send(self, input): |
| 94 | if not self.stdin: |
| 95 | return None |
| 96 | |
| 97 | try: |
| 98 | x = msvcrt.get_osfhandle(self.stdin.fileno()) |
| 99 | (_, written) = WriteFile(x, input) |
| 100 | except ValueError: |
| 101 | return self._close('stdin') |
| 102 | except Exception as ex: |
| 103 | if getattr(ex, "args", None) and ex.args[0] in (109, errno.ESHUTDOWN): |
| 104 | return self._close('stdin') |
| 105 | raise |
| 106 | |
| 107 | return written |
| 108 | |
| 109 | def _recv(self, which, maxsize): |
| 110 | conn, maxsize = self.get_conn_maxsize(which, maxsize) |
| 111 | if conn is None: |
| 112 | return None |
| 113 | |
| 114 | try: |
| 115 | x = msvcrt.get_osfhandle(conn.fileno()) |
| 116 | (read, nAvail, _) = PeekNamedPipe(x, 0) |
| 117 | if maxsize < nAvail: |
| 118 | nAvail = maxsize |
| 119 | if nAvail > 0: |
| 120 | (_, read) = ReadFile(x, nAvail, None) |
| 121 | except (ValueError, NameError): |
| 122 | return self._close(which) |
| 123 | except Exception as ex: |
| 124 | if getattr(ex, "args", None) and ex.args[0] in (109, errno.ESHUTDOWN): |
| 125 | return self._close(which) |
| 126 | raise |
| 127 | |
| 128 | if self.universal_newlines: |
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