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python-couchdb:如何检查数据库是否已经存在(How to check if database already exists)

我正在编写一个小型的Python程序,将一些文件加载​​到couchdb中。 检查具有特定名称的数据库是否已经存在是非常方便的,因此我可以创建一个新数据库或打开现有数据库。 我想做的是这样的:

import couchdb

def connect(url, dbName):
    server = couchdb.Server(url)
    if dbName exists: # how do I do this?
        return server[dbName]
    else:
        return server.create(dbName)

我知道一个尝试 - 除了块会做的伎俩,但没有一个更优雅的方式?


I am writing a small Python program that loads some documents into couchdb. It would be very convenient to check whether a database with a certain name already exists, so I can either create a new one or open the existing one. What I want to do is something like this:

import couchdb

def connect(url, dbName):
    server = couchdb.Server(url)
    if dbName exists: # how do I do this?
        return server[dbName]
    else:
        return server.create(dbName)

I know a try-except block would do the trick, but isn't there a more elegant way?


原文:https://stackoverflow.com/questions/35465360
更新时间:2023-09-04 20:09

最满意答案

生长激素正面临与您同样的事件,并且有意见,我们可以发现这种情况目前不会改变。

不过,我们可以从评论中获得一些提示:

最终,你不能从客户端隐藏秘密/令牌。

  • 如果你想从URL中删除它,你可以自己托管JS控件。
  • 如果你想从页面源代码中移除它,你可以在cookie中传递值>并在你的网页中用JS读取它。

但是,在所有情况下,该值都将在内存中提供。

我认为你可以自己建立另一个简单的网站,作为iframe和yout bot应用程序的桥梁。 您可以限制您的用户在本网站的会话中是否唯一。 此外,您还可以在实例化Bot WebChat之前验证您的用户。


There is an issue on GH which is facing the same event with you, and with the comments, we can found that this situation will not be changed currently.

However, we can get some hints from the comment:

Ultimately, you can't hide the secret/token from clients.

  • If you want to remove it from the URL, you can host the JS control on your own.
  • If you want to remove it from page source, you can pass the value in a cookie >and read it in JS in your webpage.

However, in all cases, the value will be available in memory.

I think you can build another simple web site yourself as the bridge from the iframe and yout bot application. You can restrict your user whether is unique in this website's session. And also you can verify your user before instantiate the Bot WebChat.

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