Question

我有一个脚本正在观看要接收的文件的文件夹。如果在X时间内未收到文件我想要收到警报，如果收到，我想退出脚本。我计划使用Windows计划任务来启动/停止脚本（因为我不知道如何在Python中回收它）。我目前只是试图退出Watchdog / Python WHEN文件被收到（因为我只想要警报，如果不是）。

在Handler类中，如果检测到event.event_type，我在quitter函数上添加了一个调用。但是，它不会退出并持续到达超时值。

这是我到目前为止所拥有的：

import time
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
import smtplib
import sys

file_rec = False

class Watcher:
    DIRECTORY_TO_WATCH = r"C:\Temp"

    def __init__(self):
        self.observer = Observer()

    def run(self):
        t_end = time.time() + 5 * 3 # Configure timeout value
        global file_rec
        event_handler = Handler()
        self.observer.schedule(event_handler, self.DIRECTORY_TO_WATCH, recursive=False)
        self.observer.start()
        try:
            while not file_rec:
                if time.time() > t_end: # If timeout reached file not created -- send email
                    email()

                else:
                    time.sleep(5)
        except:
            self.observer.stop()
            print("Error")

        self.observer.join()


class Handler(FileSystemEventHandler):

    @staticmethod
    def on_any_event(event):
        if event.is_directory:
            return None

        elif event.event_type == 'created':
            # File has been received, can now quit watching
            global file_rec
            file_rec = True
            quitter()

if __name__ == '__main__':

    def email():
        createMsg = "File XXX on Server XXX has not been received, manual intervention required."
        sender = 'NoReply@mydomain.com'
        receiver = 'test.user@mydomain.com'
        message = """From: No Reply <NoReply@mydomain.com>
                            TO: Test User <test.user@mydomain.com>
                            Subject: File Not Received

                            Attention Required: """ + str(createMsg)
        mail = smtplib.SMTP('email.mydomain.com', 25)
        mail.ehlo()
        #mail.starttls()
        mail.sendmail(sender, receiver, message)
        mail.close()
        quitter()

    def quitter():
        sys.exit()

    w = Watcher()
    w.run()

Answer 1

我遇到了同样的问题。我解决了将观察者传递给处理程序扩展构造函数

的问题

from watchdog.events import FileSystemEventHandler


class MyHandler(FileSystemEventHandler):
    def __init__(self, observer):
        object.__init__(self)
        self.observer = observer

    def process(self, event):
        """
        event.event_type 
            'modified' | 'created' | 'moved' | 'deleted'
        event.is_directory
            True | False
        event.src_path
            path/to/observed/file
        """
        # the file will be processed there
        print event.src_path, event.event_type  # print now only for debug
        self.observer.stop()
        print "stopped"

    def on_modified(self, event):
        self.process(event)

    def on_created(self, event):
        self.process(event)

如何从Handler类函数退出看门狗/ Python脚本？

1 个答案: