rndmcnlly/engine.py

## engine.py
#!/usr/bin/python

from __future__ import with_statement
import base64
import PyV8
import time
from twisted.application import service, internet
from twisted.web import server, resource, client

class EvalResource(resource.Resource):
    def __init__(self, parent_context):
        self.parent_context = parent_context
    def render_POST(self, request):
        b64code = request.requestHeaders.getRawHeaders('X-SCRIPTLETS-RUN-CODE')[0]
        code = base64.b64decode(b64code)
        # TODO: threads.deferToThread, setting request timeout
        try:
          with PyV8.JSContext(self.parent_context) as context:
            context.eval(code)
            app = context.locals.app
            env = {} # TODO: jsgi compatible-ify the env
            response = app(env)
            request.setResponseCode(response.status)
            headers = PyV8.convert(response.headers)
            for (k,v) in PyV8.convert(response.headers).items():
                request.setHeader(k,v)
            request.write(str(response.body))
          return ''
        except Exception, e:
          request.setResponseCode(500)
          return str(e)

class EvalDriverResource(resource.Resource):
    def render_POST(self, request):
        code = request.args.get('code', [''])[0]
        b64code = base64.b64encode(code)
        def done(page):
            request.write('<pre>'+page+'</pre>')
            request.finish()
        client.getPage(
            'http://localhost:8123/eval?arg0=zero&q=lolcats',
            method='POST',
            headers={ 'X-SCRIPTLETS-RUN-CODE':b64code,
                      'X-SCRIPTLETS-RUN-URL':'http://whatever/i/forgot',
                      'X-SCRIPTLETS-RUN-METHOD':'POST'}
          ).addBoth(done)
        return server.NOT_DONE_YET

class BaseResource(resource.Resource):
    def render(self, request):
        return """
          <html>
            <head>
              <title>New Javascript Engine Driver</title>
            </head>
            <body>
              <h1>Run it!</h1>
              <form action="/eval_driver" method="POST">
                <textarea name="code" rows="10" cols="80">
// a JSGI app, see http://jackjs.org/
function app(env) {
  return {
    status : 200,
    headers : {"Content-Type":"text/plain"},
    body : ["Hello world!"]
  };
}</textarea><br/>
                <input type="submit" name="submit" value="Run" />
              </form>
            </body>
          </html>
          """

class ScriptletsGlobals(PyV8.JSClass):
    # TODO: expose more stuff? (like however Jack shows the request)
    def fetch(self, url):
        page = 'the contents of ' + url + ' go here someday'
        time.sleep(1.0)
        return page

js_context = PyV8.JSContext(ScriptletsGlobals())
js_context.enter()

root = resource.Resource()
root.putChild('', BaseResource())
root.putChild('eval', EvalResource(js_context))
root.putChild('eval_driver', EvalDriverResource())

port = 8123

application = service.Application("newscriptlets")
service = internet.TCPServer(port, server.Site(root))
service.setServiceParent(application)
	#!/usr/bin/python

	from __future__ import with_statement
	import base64
	import PyV8
	import time
	from twisted.application import service, internet
	from twisted.web import server, resource, client

	class EvalResource(resource.Resource):
	def __init__(self, parent_context):
	self.parent_context = parent_context
	def render_POST(self, request):
	b64code = request.requestHeaders.getRawHeaders('X-SCRIPTLETS-RUN-CODE')[0]
	code = base64.b64decode(b64code)
	# TODO: threads.deferToThread, setting request timeout
	try:
	with PyV8.JSContext(self.parent_context) as context:
	context.eval(code)
	app = context.locals.app
	env = {} # TODO: jsgi compatible-ify the env
	response = app(env)
	request.setResponseCode(response.status)
	headers = PyV8.convert(response.headers)
	for (k,v) in PyV8.convert(response.headers).items():
	request.setHeader(k,v)
	request.write(str(response.body))
	return ''
	except Exception, e:
	request.setResponseCode(500)
	return str(e)

	class EvalDriverResource(resource.Resource):
	def render_POST(self, request):
	code = request.args.get('code', [''])[0]
	b64code = base64.b64encode(code)
	def done(page):
	request.write('<pre>'+page+'</pre>')
	request.finish()
	client.getPage(
	'http://localhost:8123/eval?arg0=zero&q=lolcats',
	method='POST',
	headers={ 'X-SCRIPTLETS-RUN-CODE':b64code,
	'X-SCRIPTLETS-RUN-URL':'http://whatever/i/forgot',
	'X-SCRIPTLETS-RUN-METHOD':'POST'}
	).addBoth(done)
	return server.NOT_DONE_YET

	class BaseResource(resource.Resource):
	def render(self, request):
	return """
	<html>
	<head>
	<title>New Javascript Engine Driver</title>
	</head>
	<body>
	<h1>Run it!</h1>
	<form action="/eval_driver" method="POST">
	<textarea name="code" rows="10" cols="80">
	// a JSGI app, see http://jackjs.org/
	function app(env) {
	return {
	status : 200,
	headers : {"Content-Type":"text/plain"},
	body : ["Hello world!"]
	};
	}</textarea><br/>
	<input type="submit" name="submit" value="Run" />
	</form>
	</body>
	</html>
	"""

	class ScriptletsGlobals(PyV8.JSClass):
	# TODO: expose more stuff? (like however Jack shows the request)
	def fetch(self, url):
	page = 'the contents of ' + url + ' go here someday'
	time.sleep(1.0)
	return page

	js_context = PyV8.JSContext(ScriptletsGlobals())
	js_context.enter()

	root = resource.Resource()
	root.putChild('', BaseResource())
	root.putChild('eval', EvalResource(js_context))
	root.putChild('eval_driver', EvalDriverResource())

	port = 8123

	application = service.Application("newscriptlets")
	service = internet.TCPServer(port, server.Site(root))
	service.setServiceParent(application)