问题描述
我需要从数百个 pop3 电子邮件帐户中提取数据，并且我想构建一个强大的服务器来执行此操作.
I need to pull from hundreds of pop3 email accounts, and i want to build a robust server to do this.
twisted 是此类项目的不错选择吗?
Would twisted be a good choice for this type of project?
现在一个简单的原型是从单个 pop3 帐户中提取，然后它会从多个帐户中提取，但这将是一个序列化的过程.
Right now a simple prototype would be to pull from a single pop3 account, then it would pull from many but it would be a serialized process.
我想创建一个具有多个线程的服务器，以便它可以同时执行操作.
I want to create a server that has multiple threads so it can do things at the same time.
推荐答案
Twisted 是一个用 Python 编写的事件驱动的网络框架.它主要建立在异步和非阻塞特性上，最适合开发利用这些特性的网络应用程序.对于无法提供异步非阻塞 I/O 的用例，它具有线程支持.这是基于这样一个事实，即大部分时间都花在等待网络 I/O 操作上.
Twisted is an event-driven networking framework written in Python. It builds heavily on asynchronous and non-blocking features and is best conceived to develop networking applications that utilizes these. It has thread support for use cases where you can not provide for asynchronous non-blocking I/O. This is based on the fact that most of time is spent waiting in network I/O operations.
利用这一点的两种模型是线程模型，您可以在其中创建多个线程，每个线程完成单个任务或单个进程，该进程使用非阻塞 I/O 通过交错多个任务在单个进程中完成多个任务.Twisted 非常适合第二种模式.
The two model that exploits this is threading model where you create multiple threads, each accomplishing a single task or a single process that uses non-blocking I/O to accomplish multiple task in a single process by interleaving multiple tasks. Twisted is very suitable for the second model.
非阻塞模型
+--------------------------+
|task1 | wait period | comp|
+--------------------------+
+--------------------------+
|task2 | wait period | comp|
+--------------------------+
您可以使用 Twisted 开发一个非常强大的服务器，它支持 POP3/IMAP.
You can develop a very robust server with Twisted and it has POP3 / IMAP support.
有一个例子说明如何构建 pop3 客户端与扭曲.
There is an example of how to build pop3 client with twisted.
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