webimport.py

webimport.py

import sys
import imp
import urllib2

PATHS = [
    "http://www.crummy.com/software/BeautifulSoup/download/", 
]

for path in PATHS:
    sys.path.append(path)

class WebImporter:
    def __init__(self, path):
        if path.startswith("http://"):
            self.path = path
        else:
            raise ImportError
        
    def find_module(self, fullname):
        fullname = fullname.replace('.', '/')
        urls = [self.path + fullname + ".py", self.path + fullname + "/__init__.py"]
        for url in urls:
            try:
                source = urllib2.urlopen(url).read()
            except urllib2.HTTPError:
                pass
            else:
                self.source = source.replace("\r\n", "\n")
                self.url = url
                return self
    
    def load_module(self, fullname):
        mod = sys.modules.setdefault(fullname, imp.new_module(fullname))
        mod.__file__ = self.url
        if self.url.endswith("__init__.py"):
            mod.__path__ = [self.path]
        exec self.source in mod.__dict__
        return mod
    
sys.path_hooks.append(WebImporter)