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我想检测一个文件是否在我自己的Dropbox应用程序的文件夹中删除。 所以，我设置了一个webhook来接收通知，我用DropboxClient.delta方法知道实际发生了什么变化。 根据文档，delta方法返回带有4个键的字典，'条目'键包含A list of "delta entries"。一个条目是[path, metadata]（路径是一个字符串，元数据是一个字典），元数据是无当一个文件被删除。但我从来没有得到它无，即使一个文件实际上是从目录中删除。 这里是我的网络挂接通知接收器：Dropbox webhook，检测删除的文件
@app.route('/webhook', methods=['POST', 'GET'])
def webhook():
if request.method == 'GET':
return request.args.get('challenge')
fh = open('dropbox.txt', 'a') # log file
client = dropbox.client.DropboxClient('<access token>')
for uid in json.loads(request.data)['delta']['users']:
fh.write('User %d is doing something:\n' % uid)
cursor = None
has_more = True
while has_more:
result = client.delta(cursor)
i = 1
for path, metadata in result['entries']:
fh.write('Metatadata: %s\n' % json.dumps(metadata))
i = i + 1
cursor = result['cursor']
has_more = result['has_more']
fh.write('End logging activities (#%d) of user %d\n' % (i - 1, uid))
fh.close()
return ''
所以，我添加了一些文件（3）在我的目录，并在我的日志文件，我可以看到：
User <uid> is doing something:
Metatadata: {"revision": 3, "bytes": 3952, "thumb_exists": false, "rev": "33bb68089", "modified": "Fri, 28 Aug 2015 13:40:32 +0000", "mime_type": "text/x-python", "path": "/a.py", "is_dir": false, "size": "3.9 KB", "root": "app_folder", "client_mtime": "Fri, 28 Aug 2015 13:40:32 +0000", "icon": "page_white_code"}
Metatadata: {"revision": 4, "bytes": 812, "thumb_exists": false, "rev": "43bb68089", "modified": "Fri, 28 Aug 2015 13:40:34 +0000", "mime_type": "text/x-python", "path": "/b.py", "is_dir": false, "size": "812 bytes", "root": "app_folder", "client_mtime": "Fri, 28 Aug 2015 13:40:34 +0000", "icon": "page_white_code"}
Metatadata: {"revision": 5, "bytes": 295, "thumb_exists": false, "rev": "53bb68089", "modified": "Fri, 28 Aug 2015 13:40:35 +0000", "mime_type": "text/x-python", "path": "/c.py", "is_dir": false, "size": "295 bytes", "root": "app_folder", "client_mtime": "Fri, 28 Aug 2015 13:40:35 +0000", "icon": "page_white_code"}
End logging activities (#3) of user <uid>
我删除了一个文件（C的.py），并在我的日志文件，我看到：
User <uid> is doing something:
Metatadata: {"revision": 3, "bytes": 3952, "thumb_exists": false, "rev": "33bb68089", "modified": "Fri, 28 Aug 2015 13:40:32 +0000", "mime_type": "text/x-python", "path": "/a.py", "is_dir": false, "size": "3.9 KB", "root": "app_folder", "client_mtime": "Fri, 28 Aug 2015 13:40:32 +0000", "icon": "page_white_code"}
Metatadata: {"revision": 4, "bytes": 812, "thumb_exists": false, "rev": "43bb68089", "modified": "Fri, 28 Aug 2015 13:40:34 +0000", "mime_type": "text/x-python", "path": "/c.py", "is_dir": false, "size": "812 bytes", "root": "app_folder", "client_mtime": "Fri, 28 Aug 2015 13:40:34 +0000", "icon": "page_white_code"}
End logging activities (#2) of user <uid>
每次在目录中有新的变化，我得到在该目录中也未修饰的一个所有文件的列表。尽管没有删除的痕迹。 我以为我只会收到修改或删除的文件。
这是正常行为吗？ 谢谢。