使用HTML作为Python程序的UI

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问题

1. SimpleHTTPServer无法通过管道输出信息

在做第4步的时候，遇到了很大的挫折。第1步采用subprocess模块，打开命令python MyHTTPServer.py。对subprocess的介绍可参考：

• python子进程模块subprocess详解与应用实例 之一
• 官方文档

遇到的问题是：

• popen.communicate/read会block主进程，且block时，无法用ctrl+c退出
• readline始终返回空字符

解决

最后解决的方案在这两个网页中：

• Startserver does not send data back to POpen.communicate
• Bypassing buffering of subprocess output with popen in C or Python

简而言之，block是因为，没有字符输出到stdout，因为存在缓存，对python采用-u可以解决

2. Python Requests库在访问localhost时出503 Error

参看这个网页，来自Stack Overflow
Python requests 503 erros when trying to access localhost:8000
问题是因为公司代理禁止自己ping自己。

整理

SimpleHTTPServer基于BaseHTTPServer，并提供了文件列表下载服务。它是python为BaseHTTPServer提供的例程。开发者可以基于它开发，或者参考它，并基于BaseHTTPServer开发。

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