process.terminate()
时间: 2024-06-15 11:08:56 浏览: 132
`process.terminate()` 是 Node.js 中的一个方法,用于强制终止当前进程。这个方法通常用于在某些特定情况下,例如当出现严重错误或异常时,需要立即终止进程,而不需要等待其正常退出。
使用 `process.terminate()` 方法时,Node.js 会立即停止当前进程的执行,并释放与之相关的系统资源。这通常用于处理那些无法恢复的异常或错误情况,以确保系统不会因长时间运行而崩溃。
需要注意的是,`process.terminate()` 是一个较为高级的方法,通常不建议在常规开发中使用。只有在遇到严重错误或异常,并且无法通过其他方式恢复时,才应该考虑使用此方法。
另外,需要注意的是,强制终止进程可能会对正在运行的应用程序产生影响,特别是如果应用程序正在进行某些关键操作或等待某些资源时。因此,在使用 `process.terminate()` 方法之前,应该仔细评估是否真的需要终止进程,并确保不会对其他应用程序或系统造成不良影响。
相关问题
import time import multiprocessing from proxypool.processors.server import app from proxypool.processors.getter import Getter from proxypool.processors.tester import Tester from proxypool.setting import CYCLE_GETTER, CYCLE_TESTER, API_HOST, API_THREADED, API_PORT, ENABLE_SERVER, \ ENABLE_GETTER, ENABLE_TESTER, IS_WINDOWS from loguru import logger if IS_WINDOWS: multiprocessing.freeze_support() tester_process, getter_process, server_process = None, None, None class Scheduler(): def run_tester(self, cycle=CYCLE_TESTER): if not ENABLE_TESTER: logger.info('tester not enabled, exit') return tester = Tester() loop = 0 while True: logger.debug(f'tester loop {loop} start...') tester.run() loop += 1 time.sleep(cycle) # CYCLE_GETTER=100 def run_getter(self, cycle=CYCLE_GETTER): if not ENABLE_GETTER: logger.info('getter not enabled, exit') return getter = Getter() loop = 0 while True: logger.debug(f'getter loop {loop} start...') getter.run() loop += 1 time.sleep(cycle) def run_server(self): if not ENABLE_SERVER: logger.info('server not enabled, exit') return app.run(host=API_HOST, port=API_PORT, threaded=API_THREADED) def run(self): global tester_process, getter_process, server_process try: logger.info('starting proxypool...') if ENABLE_TESTER: tester_process = multiprocessing.Process(target=self.run_tester) logger.info(f'starting tester, pid {tester_process.pid}...') tester_process.start() if ENABLE_GETTER: getter_process = multiprocessing.Process(target=self.run_getter) logger.info(f'starting getter, pid{getter_process.pid}...') getter_process.start() if ENABLE_SERVER: server_process = multiprocessing.Process(target=self.run_server) logger.info(f'starting server, pid{server_process.pid}...') server_process.start() tester_process.join() getter_process.join() server_process.join() except KeyboardInterrupt: logger.info('received keyboard interrupt signal') tester_process.terminate() getter_process.terminate() server_process.terminate() finally: # must call join method before calling is_alive tester_process.join() getter_process.join() server_process.join() logger.info(f'tester is {"alive" if tester_process.is_alive() else "dead"}') logger.info(f'getter is {"alive" if getter_process.is_alive() else "dead"}') logger.info(f'server is {"alive" if server_process.is_alive() else "dead"}') logger.info('proxy terminated') if name == 'main': scheduler = Scheduler() scheduler.run()给这段代码加注释
这段代码是一个代理池的调度程序,用于获取代理IP并测试其可用性。下面是对代码的详细注释:
```python
import time
import multiprocessing
from proxypool.processors.server import app # 导入 server 模块
from proxypool.processors.getter import Getter # 导入 getter 模块
from proxypool.processors.tester import Tester # 导入 tester 模块
from proxypool.setting import CYCLE_GETTER, CYCLE_TESTER, API_HOST, API_THREADED, API_PORT, ENABLE_SERVER, ENABLE_GETTER, ENABLE_TESTER, IS_WINDOWS # 导入配置文件
from loguru import logger # 导入日志库
if IS_WINDOWS:
multiprocessing.freeze_support() # Windows 平台需要调用这个函数
tester_process, getter_process, server_process = None, None, None # 定义进程对象
class Scheduler():
def run_tester(self, cycle=CYCLE_TESTER): # 定义 tester 进程的运行函数
if not ENABLE_TESTER: # 若不需要测试,则直接退出
logger.info('tester not enabled, exit')
return
tester = Tester()
loop = 0
while True:
logger.debug(f'tester loop {loop} start...')
tester.run() # 运行 tester
loop += 1
time.sleep(cycle) # 循环周期
def run_getter(self, cycle=CYCLE_GETTER): # 定义 getter 进程的运行函数
if not ENABLE_GETTER: # 若不需要获取,则直接退出
logger.info('getter not enabled, exit')
return
getter = Getter()
loop = 0
while True:
logger.debug(f'getter loop {loop} start...')
getter.run() # 运行 getter
loop += 1
time.sleep(cycle) # 循环周期
def run_server(self): # 定义 server 进程的运行函数
if not ENABLE_SERVER: # 若不需要启动 server,则直接退出
logger.info('server not enabled, exit')
return
app.run(host=API_HOST, port=API_PORT, threaded=API_THREADED) # 运行 server
def run(self): # 定义调度程序的运行函数
global tester_process, getter_process, server_process # 定义全局变量
try:
logger.info('starting proxypool...')
if ENABLE_TESTER: # 若需要测试,则启动 tester 进程
tester_process = multiprocessing.Process(target=self.run_tester)
logger.info(f'starting tester, pid {tester_process.pid}...')
tester_process.start()
if ENABLE_GETTER: # 若需要获取,则启动 getter 进程
getter_process = multiprocessing.Process(target=self.run_getter)
logger.info(f'starting getter, pid{getter_process.pid}...')
getter_process.start()
if ENABLE_SERVER: # 若需要启动 server,则启动 server 进程
server_process = multiprocessing.Process(target=self.run_server)
logger.info(f'starting server, pid{server_process.pid}...')
server_process.start()
tester_process.join() # 等待 tester 进程结束
getter_process.join() # 等待 getter 进程结束
server_process.join() # 等待 server 进程结束
except KeyboardInterrupt: # 捕获键盘中断信号
logger.info('received keyboard interrupt signal')
tester_process.terminate() # 终止 tester 进程
getter_process.terminate() # 终止 getter 进程
server_process.terminate() # 终止 server 进程
finally: # 无论如何都要关闭进程
tester_process.join() # 等待 tester 进程结束
getter_process.join() # 等待 getter 进程结束
server_process.join() # 等待 server 进程结束
logger.info(f'tester is {"alive" if tester_process.is_alive() else "dead"}')
logger.info(f'getter is {"alive" if getter_process.is_alive() else "dead"}')
logger.info(f'server is {"alive" if server_process.is_alive() else "dead"}')
logger.info('proxy terminated')
if __name__ == '__main__':
scheduler = Scheduler()
scheduler.run() # 运行调度程序
```
这段代码中启动了三个进程:tester 进程用于测试代理 IP 的可用性,getter 进程用于获取代理 IP,server 进程用于提供代理 IP 的 API 接口。其中,每个进程都有自己的运行函数,它们会循环运行并在一定时间间隔内执行一次相应的操作。如果不需要某个进程,则会直接退出。调度程序会等待所有进程运行结束,并在捕获到键盘中断信号时及时关闭进程。
from pathlib import Path import ffmpeg class Screenshot: def __init__(self, width=1920, height=1080, fps=15): self.width = width self.height = height self.fps = fps self.process = None self.ffmpeg_path = "E:\ffmpeg\bin" def __call__(self, width, height, fps=None): self.width = width self.height = height self.fps = fps if fps else self.fps @staticmethod def unlink(filename): Path(filename).unlink() def record(self, filename, offset_x=0, offset_y=0, draw_mouse=0): self.process = ( ffmpeg.output( ffmpeg.input( filename='desktop', format='gdigrab', framerate=self.fps, offset_x=offset_x, offset_y=offset_y, draw_mouse=draw_mouse, s=f'{self.width}x{self.height}'), filename=filename, pix_fmt='yuv420p' ).overwrite_output() ) self.ffmpeg_async() def compose_audio(self, video_path, audio_path, output_path): self.process = ( ffmpeg.output( ffmpeg.input(filename=video_path), ffmpeg.input(filename=audio_path), filename=output_path, vcodec='copy', acodec='aac', strict='experimental', pix_fmt='yuv420p' ).overwrite_output() ) self.ffmpeg_async() def ffmpeg_async(self): self.process = self.process.run_async(cmd=self.ffmpeg_path, pipe_stdin=True, pipe_stdout=False, pipe_stderr=False) def terminate(self): if self.process is not None: self.process.communicate(str.encode("q")) self.process.terminate() self.process = None
这是一个名为Screenshot的类,用于进行屏幕截图和录制视频的操作。以下是该类的一些方法和属性的解释:
- `__init__(self, width=1920, height=1080, fps=15)`:初始化函数,用于设置视频的宽度、高度和帧率。默认值为1920x1080像素和15帧每秒。
- `__call__(self, width, height, fps=None)`:可调用方法,用于更改视频的宽度、高度和帧率。如果未指定帧率,则保持原值不变。
- `unlink(filename)`:静态方法,用于删除指定文件。
- `record(self, filename, offset_x=0, offset_y=0, draw_mouse=0)`:录制屏幕并保存为视频文件。可以指定偏移量和是否绘制鼠标指针。
- `compose_audio(self, video_path, audio_path, output_path)`:合成视频和音频文件,并保存为新的输出文件。
- `ffmpeg_async(self)`:异步执行ffmpeg命令。
- `terminate(self)`:终止当前正在运行的ffmpeg进程。
这个类依赖于`pathlib`和`ffmpeg`库,并在初始化函数中设置了ffmpeg的路径。
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