单独线程中 Python 中的按键回显不显示第一个击键
Key echo in Python in separate thread doesn't display first key stroke
我会尝试 post 一个最小的工作示例，但不幸的是，这个问题只需要很多部分，所以我已尽我所能将其剥离。
首先，我使用了一个简单的脚本，它通过函数调用来模拟按键。这是根据 here.
调整的
import ctypes
SendInput = ctypes.windll.user32.SendInput
PUL = ctypes.POINTER(ctypes.c_ulong)
class KeyBdInput(ctypes.Structure):
_fields_ = [("wVk", ctypes.c_ushort),
("wScan", ctypes.c_ushort),
("dwFlags", ctypes.c_ulong),
("time", ctypes.c_ulong),
("dwExtraInfo", PUL)]
class HardwareInput(ctypes.Structure):
_fields_ = [("uMsg", ctypes.c_ulong),
("wParamL", ctypes.c_short),
("wParamH", ctypes.c_ushort)]
class MouseInput(ctypes.Structure):
_fields_ = [("dx", ctypes.c_long),
("dy", ctypes.c_long),
("mouseData", ctypes.c_ulong),
("dwFlags", ctypes.c_ulong),
("time",ctypes.c_ulong),
("dwExtraInfo", PUL)]
class Input_I(ctypes.Union):
_fields_ = [("ki", KeyBdInput),
("mi", MouseInput),
("hi", HardwareInput)]
class Input(ctypes.Structure):
_fields_ = [("type", ctypes.c_ulong),
("ii", Input_I)]
def getKeyCode(unicodeKey):
k = unicodeKey
curKeyCode = 0
if k == "up": curKeyCode = 0x26
elif k == "down": curKeyCode = 0x28
elif k == "left": curKeyCode = 0x25
elif k == "right": curKeyCode = 0x27
elif k == "home": curKeyCode = 0x24
elif k == "end": curKeyCode = 0x23
elif k == "insert": curKeyCode = 0x2D
elif k == "pgup": curKeyCode = 0x21
elif k == "pgdn": curKeyCode = 0x22
elif k == "delete": curKeyCode = 0x2E
elif k == "\n": curKeyCode = 0x0D
if curKeyCode == 0:
return 0, int(unicodeKey.encode("hex"), 16), 0x0004
else:
return curKeyCode, 0, 0
def PressKey(unicodeKey):
key, unikey, uniflag = getKeyCode(unicodeKey)
extra = ctypes.c_ulong(0)
ii_ = Input_I()
ii_.ki = KeyBdInput( key, unikey, uniflag, 0, ctypes.pointer(extra) )
x = Input( ctypes.c_ulong(1), ii_ )
ctypes.windll.user32.SendInput(1, ctypes.pointer(x), ctypes.sizeof(x))
def ReleaseKey(unicodeKey):
key, unikey, uniflag = getKeyCode(unicodeKey)
extra = ctypes.c_ulong(0)
ii_ = Input_I()
ii_.ki = KeyBdInput( key, unikey, uniflag + 0x0002, 0, ctypes.pointer(extra) )
x = Input( ctypes.c_ulong(1), ii_ )
ctypes.windll.user32.SendInput(1, ctypes.pointer(x), ctypes.sizeof(x))
我将其存储在名为 keyPress.py 的文件中。
使用这个，我想制作一个简单的程序，可以检测用户在 python shell 中输入的内容。我的想法是我会使用 msvcrt.getch() 来按下按键，然后上面的脚本让它看起来像是仍然被按下（并且 "echo" 某种意义上的按键”）
代码如下：
import keyPress
import msvcrt
import threading
def getKey():
k = msvcrt.getch()
# Escaped Key: 224 is on the keyboard, 0 is on the numpad
if int(k.encode("hex"), 16) == 224 or int(k.encode("hex"), 16) == 0:
k = msvcrt.getch()
if k == "H": k = "up"
elif k == "P": k = "down"
elif k == "K": k = "left"
elif k == "M": k = "right"
elif k == "G": k = "home"
elif k == "O": k = "end"
elif k == "R": k = "insert"
elif k == "I": k = "pgup"
elif k == "Q": k = "pgdn"
elif k == "S": k = "delete"
# Fix weird linebreak
if k == "\r":
k = "\n"
return k
def actualGetKeys():
while True:
k = getKey()
keyPress.PressKey(k)
keyPress.ReleaseKey(k)
def getKeys():
p = threading.Thread(target=actualGetKeys)
p.daemon = True
p.start()
我将其存储在名为 keyGet.py 的文件中。
这一切都运行良好，只是每当用户按下 enter 时，屏幕上不会显示第一个键。控制台仍然知道您输入了它，只是没有显示在那里。像这样：
这是怎么回事？我已经尝试了很多很多东西，但我似乎无法改变这种行为。
我现在能够使它基本上正常工作，因为它可以在脚本 运行 时异步捕获键输入，并执行您在命令提示符中键入的每个命令的文本（这样您可以，比如说，将它们存储到一个数组中）。我 运行 遇到的唯一问题是这样的：
我知道这是因为基本上必须让机器人在输入后重新输入，我只是想知道是否有一种方法可以防止在机器人输入时实际显示该输入它，所以它的行为就像用户期望的那样。
这是结果代码，基本上是 eryksun 的评论写的，因为不知何故他知道所有。
这叫做readcmd.py
# Some if this is from http://nullege.com/codes/show/src@e@i@einstein-HEAD@Python25Einstein@Lib@subprocess.py/380/win32api.GetStdHandle
# and
# http://nullege.com/codes/show/src@v@i@VistA-HEAD@Python@Pexpect@winpexpect.py/901/win32console.GetStdHandle.PeekConsoleInput
from ctypes import *
import time
import threading
from win32api import STD_INPUT_HANDLE, STD_OUTPUT_HANDLE
from win32console import GetStdHandle, KEY_EVENT, ENABLE_WINDOW_INPUT, ENABLE_MOUSE_INPUT, ENABLE_ECHO_INPUT, ENABLE_LINE_INPUT, ENABLE_PROCESSED_INPUT
import keyPress
class CaptureLines():
def __init__(self):
self.stopLock = threading.Lock()
self.isCapturingInputLines = False
self.inputLinesHookCallback = CFUNCTYPE(c_int)(self.inputLinesHook)
self.pyosInputHookPointer = c_void_p.in_dll(pythonapi, "PyOS_InputHook")
self.originalPyOsInputHookPointerValue = self.pyosInputHookPointer.value
self.readHandle = GetStdHandle(STD_INPUT_HANDLE)
self.readHandle.SetConsoleMode(ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT|ENABLE_PROCESSED_INPUT)
def inputLinesHook(self):
self.readHandle.SetConsoleMode(ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT|ENABLE_PROCESSED_INPUT)
inputChars = self.readHandle.ReadConsole(10000000)
self.readHandle.SetConsoleMode(ENABLE_LINE_INPUT|ENABLE_PROCESSED_INPUT)
if inputChars == "\r\n":
keyPress.KeyPress("\n")
return 0
inputChars = inputChars[:-2]
inputChars += "\n"
for c in inputChars:
keyPress.KeyPress(c)
self.inputCallback(inputChars)
return 0
def startCapture(self, inputCallback):
self.stopLock.acquire()
try:
if self.isCapturingInputLines:
raise Exception("Already capturing keystrokes")
self.isCapturingInputLines = True
self.inputCallback = inputCallback
self.pyosInputHookPointer.value = cast(self.inputLinesHookCallback, c_void_p).value
except Exception as e:
self.stopLock.release()
raise
self.stopLock.release()
def stopCapture(self):
self.stopLock.acquire()
try:
if not self.isCapturingInputLines:
raise Exception("Keystrokes already aren't being captured")
self.readHandle.SetConsoleMode(ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT|ENABLE_PROCESSED_INPUT)
self.isCapturingInputLines = False
self.pyosInputHookPointer.value = self.originalPyOsInputHookPointerValue
except Exception as e:
self.stopLock.release()
raise
self.stopLock.release()
这里是keyPress.py
# Modified from
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=True)
INPUT_MOUSE = 0
INPUT_KEYBOARD = 1
INPUT_HARDWARE = 2
KEYEVENTF_EXTENDEDKEY = 0x0001
KEYEVENTF_KEYUP = 0x0002
KEYEVENTF_UNICODE = 0x0004
KEYEVENTF_SCANCODE = 0x0008
MAPVK_VK_TO_VSC = 0
# C struct definitions
wintypes.ULONG_PTR = wintypes.WPARAM
SendInput = ctypes.windll.user32.SendInput
PUL = ctypes.POINTER(ctypes.c_ulong)
class KEYBDINPUT(ctypes.Structure):
_fields_ = (("wVk", wintypes.WORD),
("wScan", wintypes.WORD),
("dwFlags", wintypes.DWORD),
("time", wintypes.DWORD),
("dwExtraInfo", wintypes.ULONG_PTR))
class MOUSEINPUT(ctypes.Structure):
_fields_ = (("dx", wintypes.LONG),
("dy", wintypes.LONG),
("mouseData", wintypes.DWORD),
("dwFlags", wintypes.DWORD),
("time", wintypes.DWORD),
("dwExtraInfo", wintypes.ULONG_PTR))
class HARDWAREINPUT(ctypes.Structure):
_fields_ = (("uMsg", wintypes.DWORD),
("wParamL", wintypes.WORD),
("wParamH", wintypes.WORD))
class INPUT(ctypes.Structure):
class _INPUT(ctypes.Union):
_fields_ = (("ki", KEYBDINPUT),
("mi", MOUSEINPUT),
("hi", HARDWAREINPUT))
_anonymous_ = ("_input",)
_fields_ = (("type", wintypes.DWORD),
("_input", _INPUT))
LPINPUT = ctypes.POINTER(INPUT)
def _check_count(result, func, args):
if result == 0:
raise ctypes.WinError(ctypes.get_last_error())
return args
user32.SendInput.errcheck = _check_count
user32.SendInput.argtypes = (wintypes.UINT, # nInputs
LPINPUT, # pInputs
ctypes.c_int) # cbSize
def KeyDown(unicodeKey):
key, unikey, uniflag = GetKeyCode(unicodeKey)
x = INPUT( type=INPUT_KEYBOARD, ki= KEYBDINPUT( key, unikey, uniflag, 0))
user32.SendInput(1, ctypes.byref(x), ctypes.sizeof(x))
def KeyUp(unicodeKey):
key, unikey, uniflag = GetKeyCode(unicodeKey)
extra = ctypes.c_ulong(0)
x = INPUT( type=INPUT_KEYBOARD, ki= KEYBDINPUT( key, unikey, uniflag | KEYEVENTF_KEYUP, 0))
user32.SendInput(1, ctypes.byref(x), ctypes.sizeof(x))
def KeyPress(unicodeKey):
time.sleep(0.0001)
KeyDown(unicodeKey)
time.sleep(0.0001)
KeyUp(unicodeKey)
time.sleep(0.0001)
def GetKeyCode(unicodeKey):
k = unicodeKey
curKeyCode = 0
if k == "up": curKeyCode = 0x26
elif k == "down": curKeyCode = 0x28
elif k == "left": curKeyCode = 0x25
elif k == "right": curKeyCode = 0x27
elif k == "home": curKeyCode = 0x24
elif k == "end": curKeyCode = 0x23
elif k == "insert": curKeyCode = 0x2D
elif k == "pgup": curKeyCode = 0x21
elif k == "pgdn": curKeyCode = 0x22
elif k == "delete": curKeyCode = 0x2E
elif k == "\n": curKeyCode = 0x0D
if curKeyCode == 0:
return 0, int(unicodeKey.encode("hex"), 16), KEYEVENTF_UNICODE
else:
return curKeyCode, 0, 0
我会尝试 post 一个最小的工作示例，但不幸的是，这个问题只需要很多部分，所以我已尽我所能将其剥离。
首先，我使用了一个简单的脚本，它通过函数调用来模拟按键。这是根据 here.
调整的import ctypes
SendInput = ctypes.windll.user32.SendInput
PUL = ctypes.POINTER(ctypes.c_ulong)
class KeyBdInput(ctypes.Structure):
_fields_ = [("wVk", ctypes.c_ushort),
("wScan", ctypes.c_ushort),
("dwFlags", ctypes.c_ulong),
("time", ctypes.c_ulong),
("dwExtraInfo", PUL)]
class HardwareInput(ctypes.Structure):
_fields_ = [("uMsg", ctypes.c_ulong),
("wParamL", ctypes.c_short),
("wParamH", ctypes.c_ushort)]
class MouseInput(ctypes.Structure):
_fields_ = [("dx", ctypes.c_long),
("dy", ctypes.c_long),
("mouseData", ctypes.c_ulong),
("dwFlags", ctypes.c_ulong),
("time",ctypes.c_ulong),
("dwExtraInfo", PUL)]
class Input_I(ctypes.Union):
_fields_ = [("ki", KeyBdInput),
("mi", MouseInput),
("hi", HardwareInput)]
class Input(ctypes.Structure):
_fields_ = [("type", ctypes.c_ulong),
("ii", Input_I)]
def getKeyCode(unicodeKey):
k = unicodeKey
curKeyCode = 0
if k == "up": curKeyCode = 0x26
elif k == "down": curKeyCode = 0x28
elif k == "left": curKeyCode = 0x25
elif k == "right": curKeyCode = 0x27
elif k == "home": curKeyCode = 0x24
elif k == "end": curKeyCode = 0x23
elif k == "insert": curKeyCode = 0x2D
elif k == "pgup": curKeyCode = 0x21
elif k == "pgdn": curKeyCode = 0x22
elif k == "delete": curKeyCode = 0x2E
elif k == "\n": curKeyCode = 0x0D
if curKeyCode == 0:
return 0, int(unicodeKey.encode("hex"), 16), 0x0004
else:
return curKeyCode, 0, 0
def PressKey(unicodeKey):
key, unikey, uniflag = getKeyCode(unicodeKey)
extra = ctypes.c_ulong(0)
ii_ = Input_I()
ii_.ki = KeyBdInput( key, unikey, uniflag, 0, ctypes.pointer(extra) )
x = Input( ctypes.c_ulong(1), ii_ )
ctypes.windll.user32.SendInput(1, ctypes.pointer(x), ctypes.sizeof(x))
def ReleaseKey(unicodeKey):
key, unikey, uniflag = getKeyCode(unicodeKey)
extra = ctypes.c_ulong(0)
ii_ = Input_I()
ii_.ki = KeyBdInput( key, unikey, uniflag + 0x0002, 0, ctypes.pointer(extra) )
x = Input( ctypes.c_ulong(1), ii_ )
ctypes.windll.user32.SendInput(1, ctypes.pointer(x), ctypes.sizeof(x))
我将其存储在名为 keyPress.py 的文件中。
使用这个，我想制作一个简单的程序，可以检测用户在 python shell 中输入的内容。我的想法是我会使用 msvcrt.getch() 来按下按键，然后上面的脚本让它看起来像是仍然被按下（并且 "echo" 某种意义上的按键”）
代码如下：
import keyPress
import msvcrt
import threading
def getKey():
k = msvcrt.getch()
# Escaped Key: 224 is on the keyboard, 0 is on the numpad
if int(k.encode("hex"), 16) == 224 or int(k.encode("hex"), 16) == 0:
k = msvcrt.getch()
if k == "H": k = "up"
elif k == "P": k = "down"
elif k == "K": k = "left"
elif k == "M": k = "right"
elif k == "G": k = "home"
elif k == "O": k = "end"
elif k == "R": k = "insert"
elif k == "I": k = "pgup"
elif k == "Q": k = "pgdn"
elif k == "S": k = "delete"
# Fix weird linebreak
if k == "\r":
k = "\n"
return k
def actualGetKeys():
while True:
k = getKey()
keyPress.PressKey(k)
keyPress.ReleaseKey(k)
def getKeys():
p = threading.Thread(target=actualGetKeys)
p.daemon = True
p.start()
我将其存储在名为 keyGet.py 的文件中。
这一切都运行良好，只是每当用户按下 enter 时，屏幕上不会显示第一个键。控制台仍然知道您输入了它，只是没有显示在那里。像这样：
这是怎么回事？我已经尝试了很多很多东西，但我似乎无法改变这种行为。
我现在能够使它基本上正常工作，因为它可以在脚本 运行 时异步捕获键输入，并执行您在命令提示符中键入的每个命令的文本（这样您可以，比如说，将它们存储到一个数组中）。我 运行 遇到的唯一问题是这样的：
我知道这是因为基本上必须让机器人在输入后重新输入，我只是想知道是否有一种方法可以防止在机器人输入时实际显示该输入它，所以它的行为就像用户期望的那样。
这是结果代码，基本上是 eryksun 的评论写的，因为不知何故他知道所有。
这叫做readcmd.py
# Some if this is from http://nullege.com/codes/show/src@e@i@einstein-HEAD@Python25Einstein@Lib@subprocess.py/380/win32api.GetStdHandle
# and
# http://nullege.com/codes/show/src@v@i@VistA-HEAD@Python@Pexpect@winpexpect.py/901/win32console.GetStdHandle.PeekConsoleInput
from ctypes import *
import time
import threading
from win32api import STD_INPUT_HANDLE, STD_OUTPUT_HANDLE
from win32console import GetStdHandle, KEY_EVENT, ENABLE_WINDOW_INPUT, ENABLE_MOUSE_INPUT, ENABLE_ECHO_INPUT, ENABLE_LINE_INPUT, ENABLE_PROCESSED_INPUT
import keyPress
class CaptureLines():
def __init__(self):
self.stopLock = threading.Lock()
self.isCapturingInputLines = False
self.inputLinesHookCallback = CFUNCTYPE(c_int)(self.inputLinesHook)
self.pyosInputHookPointer = c_void_p.in_dll(pythonapi, "PyOS_InputHook")
self.originalPyOsInputHookPointerValue = self.pyosInputHookPointer.value
self.readHandle = GetStdHandle(STD_INPUT_HANDLE)
self.readHandle.SetConsoleMode(ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT|ENABLE_PROCESSED_INPUT)
def inputLinesHook(self):
self.readHandle.SetConsoleMode(ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT|ENABLE_PROCESSED_INPUT)
inputChars = self.readHandle.ReadConsole(10000000)
self.readHandle.SetConsoleMode(ENABLE_LINE_INPUT|ENABLE_PROCESSED_INPUT)
if inputChars == "\r\n":
keyPress.KeyPress("\n")
return 0
inputChars = inputChars[:-2]
inputChars += "\n"
for c in inputChars:
keyPress.KeyPress(c)
self.inputCallback(inputChars)
return 0
def startCapture(self, inputCallback):
self.stopLock.acquire()
try:
if self.isCapturingInputLines:
raise Exception("Already capturing keystrokes")
self.isCapturingInputLines = True
self.inputCallback = inputCallback
self.pyosInputHookPointer.value = cast(self.inputLinesHookCallback, c_void_p).value
except Exception as e:
self.stopLock.release()
raise
self.stopLock.release()
def stopCapture(self):
self.stopLock.acquire()
try:
if not self.isCapturingInputLines:
raise Exception("Keystrokes already aren't being captured")
self.readHandle.SetConsoleMode(ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT|ENABLE_PROCESSED_INPUT)
self.isCapturingInputLines = False
self.pyosInputHookPointer.value = self.originalPyOsInputHookPointerValue
except Exception as e:
self.stopLock.release()
raise
self.stopLock.release()
这里是keyPress.py
# Modified from
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=True)
INPUT_MOUSE = 0
INPUT_KEYBOARD = 1
INPUT_HARDWARE = 2
KEYEVENTF_EXTENDEDKEY = 0x0001
KEYEVENTF_KEYUP = 0x0002
KEYEVENTF_UNICODE = 0x0004
KEYEVENTF_SCANCODE = 0x0008
MAPVK_VK_TO_VSC = 0
# C struct definitions
wintypes.ULONG_PTR = wintypes.WPARAM
SendInput = ctypes.windll.user32.SendInput
PUL = ctypes.POINTER(ctypes.c_ulong)
class KEYBDINPUT(ctypes.Structure):
_fields_ = (("wVk", wintypes.WORD),
("wScan", wintypes.WORD),
("dwFlags", wintypes.DWORD),
("time", wintypes.DWORD),
("dwExtraInfo", wintypes.ULONG_PTR))
class MOUSEINPUT(ctypes.Structure):
_fields_ = (("dx", wintypes.LONG),
("dy", wintypes.LONG),
("mouseData", wintypes.DWORD),
("dwFlags", wintypes.DWORD),
("time", wintypes.DWORD),
("dwExtraInfo", wintypes.ULONG_PTR))
class HARDWAREINPUT(ctypes.Structure):
_fields_ = (("uMsg", wintypes.DWORD),
("wParamL", wintypes.WORD),
("wParamH", wintypes.WORD))
class INPUT(ctypes.Structure):
class _INPUT(ctypes.Union):
_fields_ = (("ki", KEYBDINPUT),
("mi", MOUSEINPUT),
("hi", HARDWAREINPUT))
_anonymous_ = ("_input",)
_fields_ = (("type", wintypes.DWORD),
("_input", _INPUT))
LPINPUT = ctypes.POINTER(INPUT)
def _check_count(result, func, args):
if result == 0:
raise ctypes.WinError(ctypes.get_last_error())
return args
user32.SendInput.errcheck = _check_count
user32.SendInput.argtypes = (wintypes.UINT, # nInputs
LPINPUT, # pInputs
ctypes.c_int) # cbSize
def KeyDown(unicodeKey):
key, unikey, uniflag = GetKeyCode(unicodeKey)
x = INPUT( type=INPUT_KEYBOARD, ki= KEYBDINPUT( key, unikey, uniflag, 0))
user32.SendInput(1, ctypes.byref(x), ctypes.sizeof(x))
def KeyUp(unicodeKey):
key, unikey, uniflag = GetKeyCode(unicodeKey)
extra = ctypes.c_ulong(0)
x = INPUT( type=INPUT_KEYBOARD, ki= KEYBDINPUT( key, unikey, uniflag | KEYEVENTF_KEYUP, 0))
user32.SendInput(1, ctypes.byref(x), ctypes.sizeof(x))
def KeyPress(unicodeKey):
time.sleep(0.0001)
KeyDown(unicodeKey)
time.sleep(0.0001)
KeyUp(unicodeKey)
time.sleep(0.0001)
def GetKeyCode(unicodeKey):
k = unicodeKey
curKeyCode = 0
if k == "up": curKeyCode = 0x26
elif k == "down": curKeyCode = 0x28
elif k == "left": curKeyCode = 0x25
elif k == "right": curKeyCode = 0x27
elif k == "home": curKeyCode = 0x24
elif k == "end": curKeyCode = 0x23
elif k == "insert": curKeyCode = 0x2D
elif k == "pgup": curKeyCode = 0x21
elif k == "pgdn": curKeyCode = 0x22
elif k == "delete": curKeyCode = 0x2E
elif k == "\n": curKeyCode = 0x0D
if curKeyCode == 0:
return 0, int(unicodeKey.encode("hex"), 16), KEYEVENTF_UNICODE
else:
return curKeyCode, 0, 0