python 如何监控打印机 并输出打印的内容
时间: 2024-04-09 17:28:59 浏览: 9
你可以使用Python的`win32print`模块来监控打印机并获取打印的内容。下面是一个简单的示例代码:
```python
import win32print
import win32api
import time
def monitor_printer():
# 获取默认打印机
default_printer = win32print.GetDefaultPrinter()
# 打开打印机设备
printer_handle = win32print.OpenPrinter(default_printer)
# 设置打印机通知
flags = win32print.PRINTER_CHANGE_JOB
handle = win32print.FindFirstPrinterChangeNotification(printer_handle, flags)
try:
while True:
# 等待打印任务变化通知
result = win32api.WaitForSingleObject(handle, 500)
if result == win32api.WAIT_OBJECT_0:
# 获取打印任务信息
job_info = win32print.FindNextPrinterChangeNotification(handle)
# 检查打印任务类型为添加或修改
if job_info[2] == win32print.PRINTER_CHANGE_ADD_JOB or job_info[2] == win32print.PRINTER_CHANGE_SET_JOB:
# 获取打印任务句柄
job_handle = win32print.OpenPrinter(default_printer)
job_info = win32print.GetJob(job_handle, job_info[3], 2)
# 输出打印内容
print("打印内容:", job_info['pDocument'])
# 重新设置打印机通知
win32print.FindClosePrinterChangeNotification(handle)
handle = win32print.FindFirstPrinterChangeNotification(printer_handle, flags)
# 等待一段时间后继续监控
time.sleep(1)
except KeyboardInterrupt:
# 用户中断监控
win32print.FindClosePrinterChangeNotification(handle)
win32print.ClosePrinter(printer_handle)
monitor_printer()
```
这段代码通过循环监控打印机的打印任务,当有新的打印任务添加或修改时,获取打印任务信息并输出打印内容。请注意,此代码仅在Windows操作系统上有效。