##// END OF EJS Templates
pyerr -> error
pyerr -> error

File last commit:

r13697:dcc9c441
r16569:eb3c0ac4
Show More
serve.py
112 lines | 4.1 KiB | text/x-python | PythonLexer
"""PostProcessor for serving reveal.js HTML slideshows."""
from __future__ import print_function
#-----------------------------------------------------------------------------
#Copyright (c) 2013, the IPython Development Team.
#
#Distributed under the terms of the Modified BSD License.
#
#The full license is in the file COPYING.txt, distributed with this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import os
import webbrowser
from tornado import web, ioloop, httpserver
from tornado.httpclient import AsyncHTTPClient
from IPython.utils.traitlets import Bool, Unicode, Int
from .base import PostProcessorBase
#-----------------------------------------------------------------------------
# Classes
#-----------------------------------------------------------------------------
class ProxyHandler(web.RequestHandler):
"""handler the proxies requests from a local prefix to a CDN"""
@web.asynchronous
def get(self, prefix, url):
"""proxy a request to a CDN"""
proxy_url = "/".join([self.settings['cdn'], url])
client = self.settings['client']
client.fetch(proxy_url, callback=self.finish_get)
def finish_get(self, response):
"""finish the request"""
# copy potentially relevant headers
for header in ["Content-Type", "Cache-Control", "Date", "Last-Modified", "Expires"]:
if header in response.headers:
self.set_header(header, response.headers[header])
self.finish(response.body)
class ServePostProcessor(PostProcessorBase):
"""Post processor designed to serve files
Proxies reveal.js requests to a CDN if no local reveal.js is present
"""
open_in_browser = Bool(True, config=True,
help="""Should the browser be opened automatically?"""
)
reveal_cdn = Unicode("https://cdn.jsdelivr.net/reveal.js/2.5.0", config=True,
help="""URL for reveal.js CDN."""
)
reveal_prefix = Unicode("reveal.js", config=True, help="URL prefix for reveal.js")
ip = Unicode("127.0.0.1", config=True, help="The IP address to listen on.")
port = Int(8000, config=True, help="port for the server to listen on.")
def postprocess(self, input):
"""Serve the build directory with a webserver."""
dirname, filename = os.path.split(input)
handlers = [
(r"/(.+)", web.StaticFileHandler, {'path' : dirname}),
(r"/", web.RedirectHandler, {"url": "/%s" % filename})
]
if ('://' in self.reveal_prefix or self.reveal_prefix.startswith("//")):
# reveal specifically from CDN, nothing to do
pass
elif os.path.isdir(os.path.join(dirname, self.reveal_prefix)):
# reveal prefix exists
self.log.info("Serving local %s", self.reveal_prefix)
else:
self.log.info("Redirecting %s requests to %s", self.reveal_prefix, self.reveal_cdn)
handlers.insert(0, (r"/(%s)/(.*)" % self.reveal_prefix, ProxyHandler))
app = web.Application(handlers,
cdn=self.reveal_cdn,
client=AsyncHTTPClient(),
)
# hook up tornado logging to our logger
try:
from tornado import log
log.app_log = self.log
except ImportError:
# old tornado (<= 3), ignore
pass
http_server = httpserver.HTTPServer(app)
http_server.listen(self.port, address=self.ip)
url = "http://%s:%i/%s" % (self.ip, self.port, filename)
print("Serving your slides at %s" % url)
print("Use Control-C to stop this server")
if self.open_in_browser:
webbrowser.open(url, new=2)
try:
ioloop.IOLoop.instance().start()
except KeyboardInterrupt:
print("\nInterrupted")
def main(path):
"""allow running this module to serve the slides"""
server = ServePostProcessor()
server(path)
if __name__ == '__main__':
import sys
main(sys.argv[1])