如果程序直接写入控制台（例如，通过打开CONOUT$设备）而不是写入过程标准句柄，则唯一的选择是直接读取控制台屏幕缓冲区。为了简化此过程，请从新的空白屏幕缓冲区开始。通过以下功能创建，调整大小，初始化和激活新的屏幕缓冲区：
请确保GENERIC_READ | GENERIC_WRITE在致电时请求访问权限CreateConsoleScreenBuffer。您稍后需要读取权限才能读取屏幕内容。
专门针对Python，使用ctypes调用Windows控制台API中的函数。另外，如果您通过C将文件句柄包装为C文件描述符msvcrt.open_osfhandle，则可以将其作为stdout或stderr参数传递subprocess.Popen。
文件描述符或手柄屏幕缓冲区无法通过直接读取read，ReadFile或甚ReadConsole。如果您有文件描述符，请通过获取基本句柄msvcrt.get_osfhandle。给定屏幕缓冲区句柄，调用ReadConsoleOutputCharacter以从屏幕读取。read_screen下面的示例代码中的函数演示了从屏幕缓冲区的开始到光标位置的读取。
为了使用控制台API，需要将进程附加到控制台。为此，我提供了一个简单的allocate_console上下文管理器来临时打开控制台。这在GUI应用程序中很有用，而GUI应用程序通常未连接到控制台。
以下示例在Windows 7和10，Python 2.7和3.5中进行了测试。
import os
import contextlib
import msvcrt
import ctypes
from ctypes import wintypes
kernel32 = ctypes.WinDLL('kernel32', use_last_error=True)
GENERIC_READ = 0x80000000
GENERIC_WRITE = 0x40000000
FILE_SHARE_READ = 1
FILE_SHARE_WRITE = 2
CONSOLE_TEXTMODE_BUFFER = 1
INVALID_HANDLE_VALUE = wintypes.HANDLE(-1).value
STD_OUTPUT_HANDLE = wintypes.DWORD(-11)
STD_ERROR_HANDLE = wintypes.DWORD(-12)
def _check_zero(result, func, args):
if not result:
raise ctypes.WinError(ctypes.get_last_error())
return args
def _check_invalid(result, func, args):
if result == INVALID_HANDLE_VALUE:
raise ctypes.WinError(ctypes.get_last_error())
return args
if not hasattr(wintypes, 'LPDWORD'): # Python 2
wintypes.LPDWORD = ctypes.POINTER(wintypes.DWORD)
wintypes.PSMALL_RECT = ctypes.POINTER(wintypes.SMALL_RECT)
class COORD(ctypes.Structure):
_fields_ = (('X', wintypes.SHORT),
('Y', wintypes.SHORT))
class CONSOLE_SCREEN_BUFFER_INFOEX(ctypes.Structure):
_fields_ = (('cbSize', wintypes.ULONG),
('dwSize', COORD),
('dwCursorPosition', COORD),
('wAttributes', wintypes.WORD),
('srWindow', wintypes.SMALL_RECT),
('dwMaximumWindowSize', COORD),
('wPopupAttributes', wintypes.WORD),
('bFullscreenSupported', wintypes.BOOL),
('ColorTable', wintypes.DWORD * 16))
def __init__(self, *args, **kwds):
super(CONSOLE_SCREEN_BUFFER_INFOEX, self).__init__(
*args, **kwds)
self.cbSize = ctypes.sizeof(self)
PCONSOLE_SCREEN_BUFFER_INFOEX = ctypes.POINTER(
CONSOLE_SCREEN_BUFFER_INFOEX)
LPSecurity_ATTRIBUTES = wintypes.LPVOID
kernel32.GetStdHandle.errcheck = _check_invalid
kernel32.GetStdHandle.restype = wintypes.HANDLE
kernel32.GetStdHandle.argtypes = (
wintypes.DWORD,) # _In_ nStdHandle
kernel32.CreateConsoleScreenBuffer.errcheck = _check_invalid
kernel32.CreateConsoleScreenBuffer.restype = wintypes.HANDLE
kernel32.CreateConsoleScreenBuffer.argtypes = (
wintypes.DWORD, # _In_ dwDesiredAccess
wintypes.DWORD, # _In_ dwShareMode
LPSecurity_ATTRIBUTES, # _In_opt_ lpSecurityAttributes
wintypes.DWORD, # _In_ dwFlags
wintypes.LPVOID) # _Reserved_ lpScreenBufferData
kernel32.GetConsoleScreenBufferInfoEx.errcheck = _check_zero
kernel32.GetConsoleScreenBufferInfoEx.argtypes = (
wintypes.HANDLE, # _In_ hConsoleOutput
PCONSOLE_SCREEN_BUFFER_INFOEX) # _Out_ lpConsoleScreenBufferInfo
kernel32.SetConsoleScreenBufferInfoEx.errcheck = _check_zero
kernel32.SetConsoleScreenBufferInfoEx.argtypes = (
wintypes.HANDLE, # _In_ hConsoleOutput
PCONSOLE_SCREEN_BUFFER_INFOEX) # _In_ lpConsoleScreenBufferInfo
kernel32.SetConsoleWindowInfo.errcheck = _check_zero
kernel32.SetConsoleWindowInfo.argtypes = (
wintypes.HANDLE, # _In_ hConsoleOutput
wintypes.BOOL, # _In_ bAbsolute
wintypes.PSMALL_RECT) # _In_ lpConsoleWindow
kernel32.FillConsoleOutputCharacterW.errcheck = _check_zero
kernel32.FillConsoleOutputCharacterW.argtypes = (
wintypes.HANDLE, # _In_ hConsoleOutput
wintypes.WCHAR, # _In_ cCharacter
wintypes.DWORD, # _In_ nLength
COORD, # _In_ dwWriteCoord
wintypes.LPDWORD) # _Out_ lpNumberOfCharsWritten
kernel32.ReadConsoleOutputCharacterW.errcheck = _check_zero
kernel32.ReadConsoleOutputCharacterW.argtypes = (
wintypes.HANDLE, # _In_ hConsoleOutput
wintypes.LPWSTR, # _Out_ lpCharacter
wintypes.DWORD, # _In_ nLength
COORD, # _In_ dwReadCoord
wintypes.LPDWORD) # _Out_ lpNumberOfCharsRead
@contextlib.contextmanager
def allocate_console():
allocated = kernel32.AllocConsole()
try:
yield allocated
finally:
if allocated:
kernel32.FreeConsole()
@contextlib.contextmanager
def console_screen(ncols=None, nrows=None):
info = CONSOLE_SCREEN_BUFFER_INFOEX()
new_info = CONSOLE_SCREEN_BUFFER_INFOEX()
nwritten = (wintypes.DWORD * 1)()
hStdOut = kernel32.GetStdHandle(STD_OUTPUT_HANDLE)
kernel32.GetConsoleScreenBufferInfoEx(
hStdOut, ctypes.byref(info))
if ncols is None:
ncols = info.dwSize.X
if nrows is None:
nrows = info.dwSize.Y
elif nrows > 9999:
raise ValueError('nrows must be 9999 or less')
fd_screen = None
hScreen = kernel32.CreateConsoleScreenBuffer(
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
None, CONSOLE_TEXTMODE_BUFFER, None)
try:
fd_screen = msvcrt.open_osfhandle(
hScreen, os.O_RDWR | os.O_BINARY)
kernel32.GetConsoleScreenBufferInfoEx(
hScreen, ctypes.byref(new_info))
new_info.dwSize = COORD(ncols, nrows)
new_info.srWindow = wintypes.SMALL_RECT(
Left=0, Top=0, Right=(ncols - 1),
Bottom=(info.srWindow.Bottom - info.srWindow.Top))
kernel32.SetConsoleScreenBufferInfoEx(
hScreen, ctypes.byref(new_info))
kernel32.SetConsoleWindowInfo(hScreen, True,
ctypes.byref(new_info.srWindow))
kernel32.FillConsoleOutputCharacterW(
hScreen, u'\0', ncols * nrows, COORD(0,0), nwritten)
kernel32.SetConsoleActiveScreenBuffer(hScreen)
try:
yield fd_screen
finally:
kernel32.SetConsoleScreenBufferInfoEx(
hStdOut, ctypes.byref(info))
kernel32.SetConsoleWindowInfo(hStdOut, True,
ctypes.byref(info.srWindow))
kernel32.SetConsoleActiveScreenBuffer(hStdOut)
finally:
if fd_screen is not None:
os.close(fd_screen)
else:
kernel32.CloseHandle(hScreen)
def read_screen(fd):
hScreen = msvcrt.get_osfhandle(fd)
csbi = CONSOLE_SCREEN_BUFFER_INFOEX()
kernel32.GetConsoleScreenBufferInfoEx(
hScreen, ctypes.byref(csbi))
ncols = csbi.dwSize.X
pos = csbi.dwCursorPosition
length = ncols * pos.Y + pos.X + 1
buf = (ctypes.c_wchar * length)()
n = (wintypes.DWORD * 1)()
kernel32.ReadConsoleOutputCharacterW(
hScreen, buf, length, COORD(0,0), n)
lines = [buf[i:i+ncols].rstrip(u'\0')
for i in range(0, n[0], ncols)]
return u'\n'.join(lines)
if __name__ == '__main__':
import io
import textwrap
import subprocess
text = textwrap.dedent('''\
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do
eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut
enim ad minim veniam, quis nostrud exercitation ullamco laboris
nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
in reprehenderit in voluptate velit esse cillum dolore eu
fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
proident, sunt in culpa qui officia deserunt mollit anim id est
laborum.''')
cmd = ("python -c \""
"print('piped output');"
"conout = open(r'CONOUT$', 'w');"
"conout.write('''%s''')\"" % text)
with allocate_console() as allocated:
with console_screen(nrows=1000) as fd_conout:
stdout = subprocess.check_output(cmd).decode()
conout = read_screen(fd_conout)
with io.open('result.txt', 'w', encoding='utf-8') as f:
f.write(u'stdout:\n' + stdout)
f.write(u'\nconout:\n' + conout)
stdout:
piped output
conout:
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do
eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut
enim ad minim veniam, quis nostrud exercitation ullamco laboris
nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
in reprehenderit in voluptate velit esse cillum dolore eu
fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
proident, sunt in culpa qui officia deserunt mollit anim id est
laborum.
602392714
清零编程群