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""" I am a virtual hosts implementation. """ from __future__ import division, absolute_import # Twisted Imports from twisted.python import roots from twisted.web import resource class VirtualHostCollection(roots.Homogenous): """Wrapper for virtual hosts collection. This exists for configuration purposes. """ entityType = resource.Resource def __init__(self, nvh): self.nvh = nvh def listStaticEntities(self): return self.nvh.hosts.items() def getStaticEntity(self, name): return self.nvh.hosts.get(self) def reallyPutEntity(self, name, entity): self.nvh.addHost(name, entity) def delEntity(self, name): self.nvh.removeHost(name) class NameVirtualHost(resource.Resource): """I am a resource which represents named virtual hosts. """ default = None def __init__(self): """Initialize. """ resource.Resource.__init__(self) self.hosts = {} def listStaticEntities(self): return resource.Resource.listStaticEntities(self) + [("Virtual Hosts", VirtualHostCollection(self))] def getStaticEntity(self, name): if name == "Virtual Hosts": return VirtualHostCollection(self) else: return resource.Resource.getStaticEntity(self, name) def addHost(self, name, resrc): """Add a host to this virtual host. This will take a host named `name', and map it to a resource `resrc'. For example, a setup for our virtual hosts would be:: nvh.addHost('divunal.com', divunalDirectory) nvh.addHost('www.divunal.com', divunalDirectory) nvh.addHost('twistedmatrix.com', twistedMatrixDirectory) nvh.addHost('www.twistedmatrix.com', twistedMatrixDirectory) """ self.hosts[name] = resrc def removeHost(self, name): """Remove a host.""" del self.hosts[name] def _getResourceForRequest(self, request): """(Internal) Get the appropriate resource for the given host. """ hostHeader = request.getHeader(b'host') if hostHeader == None: return self.default or resource.NoResource() else: host = hostHeader.lower().split(b':', 1)[0] return (self.hosts.get(host, self.default) or resource.NoResource("host %s not in vhost map" % repr(host))) def render(self, request): """Implementation of resource.Resource's render method. """ resrc = self._getResourceForRequest(request) return resrc.render(request) def getChild(self, path, request): """Implementation of resource.Resource's getChild method. """ resrc = self._getResourceForRequest(request) if resrc.isLeaf: request.postpath.insert(0,request.prepath.pop(-1)) return resrc else: return resrc.getChildWithDefault(path, request) class _HostResource(resource.Resource): def getChild(self, path, request): if b':' in path: host, port = path.split(b':', 1) port = int(port) else: host, port = path, 80 request.setHost(host, port) prefixLen = (3 + request.isSecure() + 4 + len(path) + len(request.prepath[-3])) request.path = b'/' + b'/'.join(request.postpath) request.uri = request.uri[prefixLen:] del request.prepath[:3] return request.site.getResourceFor(request) class VHostMonsterResource(resource.Resource): """ Use this to be able to record the hostname and method (http vs. https) in the URL without disturbing your web site. If you put this resource in a URL http://foo.com/bar then requests to http://foo.com/bar/http/baz.com/something will be equivalent to http://foo.com/something, except that the hostname the request will appear to be accessing will be "baz.com". So if "baz.com" is redirecting all requests for to foo.com, while foo.com is inaccessible from the outside, then redirect and url generation will work correctly """ def getChild(self, path, request): if path == b'http': request.isSecure = lambda: 0 elif path == b'https': request.isSecure = lambda: 1 return _HostResource()