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# -*- test-case-name: twisted.web.test.test_script -*-
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# Copyright (c) 2001-2009 Twisted Matrix Laboratories.
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# See LICENSE for details.
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I contain PythonScript, which is a very simple python script resource.
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import cStringIO as StringIO
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from twisted import copyright
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from twisted.web import http, server, static, resource, html
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rpyNoResource = """<p>You forgot to assign to the variable "resource" in your script. For example:</p>
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import mygreatresource
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resource = mygreatresource.MyGreatResource()
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class AlreadyCached(Exception):
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"""This exception is raised when a path has already been cached.
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def __init__(self, path, registry):
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self.registry = registry
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c = self.registry.getCachedPath(self.path)
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raise AlreadyCached(c)
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noRsrc = resource.ErrorPage(500, "Whoops! Internal Error", rpyNoResource)
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def ResourceScript(path, registry):
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I am a normal py file which must define a 'resource' global, which should
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be an instance of (a subclass of) web.resource.Resource; it will be
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cs = CacheScanner(path, registry)
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glob = {'__file__': path,
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'recache': cs.recache}
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execfile(path, glob, glob)
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except AlreadyCached, ac:
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rsrc = glob['resource']
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if cs.doCache and rsrc is not noRsrc:
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registry.cachePath(path, rsrc)
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def ResourceTemplate(path, registry):
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from quixote import ptl_compile
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glob = {'__file__': path,
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'resource': resource.ErrorPage(500, "Whoops! Internal Error",
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e = ptl_compile.compile_template(open(path), path)
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return glob['resource']
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class ResourceScriptWrapper(resource.Resource):
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def __init__(self, path, registry=None):
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resource.Resource.__init__(self)
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self.registry = registry or static.Registry()
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def render(self, request):
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res = ResourceScript(self.path, self.registry)
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return res.render(request)
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def getChildWithDefault(self, path, request):
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res = ResourceScript(self.path, self.registry)
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return res.getChildWithDefault(path, request)
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class ResourceScriptDirectory(resource.Resource):
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L{ResourceScriptDirectory} is a resource which serves scripts from a
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filesystem directory. File children of a L{ResourceScriptDirectory} will
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be served using L{ResourceScript}. Directory children will be served using
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another L{ResourceScriptDirectory}.
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@ivar path: A C{str} giving the filesystem path in which children will be
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@ivar registry: A L{static.Registry} instance which will be used to decide
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how to interpret scripts found as children of this resource.
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def __init__(self, pathname, registry=None):
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resource.Resource.__init__(self)
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self.registry = registry or static.Registry()
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def getChild(self, path, request):
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fn = os.path.join(self.path, path)
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if os.path.isdir(fn):
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return ResourceScriptDirectory(fn, self.registry)
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if os.path.exists(fn):
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return ResourceScript(fn, self.registry)
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return resource.NoResource()
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def render(self, request):
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return resource.NoResource().render(request)
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class PythonScript(resource.Resource):
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"""I am an extremely simple dynamic resource; an embedded python script.
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This will execute a file (usually of the extension '.epy') as Python code,
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internal to the webserver.
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def __init__(self, filename, registry):
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"""Initialize me with a script name.
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self.filename = filename
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self.registry = registry
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def render(self, request):
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"""Render me to a web client.
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Load my file, execute it in a special namespace (with 'request' and
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'__file__' global vars) and finish the request. Output to the web-page
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will NOT be handled with print - standard output goes to the log - but
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request.setHeader("x-powered-by","Twisted/%s" % copyright.version)
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namespace = {'request': request,
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'__file__': self.filename,
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'registry': self.registry}
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execfile(self.filename, namespace, namespace)
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if e.errno == 2: #file not found
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request.setResponseCode(http.NOT_FOUND)
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request.write(resource.NoResource("File not found.").render(request))
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io = StringIO.StringIO()
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traceback.print_exc(file=io)
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request.write(html.PRE(io.getvalue()))
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return server.NOT_DONE_YET
added
removed
twisted/web/script.py
