116 lines
4.3 KiB
Python
116 lines
4.3 KiB
Python
|
"""PostProcessor for serving reveal.js HTML slideshows."""
|
||
|
|
|
||
|
|
# Copyright (c) Jupyter Development Team.
|
||
|
|
# Distributed under the terms of the Modified BSD License.
|
||
|
|
|
||
|
|
from __future__ import print_function
|
||
|
|
|
||
|
|
import os
|
||
|
|
import webbrowser
|
||
|
|
import threading
|
||
|
|
|
||
|
|
from tornado import web, ioloop, httpserver, log, gen
|
||
|
|
from tornado.httpclient import AsyncHTTPClient
|
||
|
|
from traitlets import Bool, Unicode, Int
|
||
|
|
|
||
|
|
from .base import PostProcessorBase
|
||
|
|
|
||
|
|
|
||
|
|
class ProxyHandler(web.RequestHandler):
|
||
|
|
"""handler the proxies requests from a local prefix to a CDN"""
|
||
|
|
@gen.coroutine
|
||
|
|
def get(self, prefix, url):
|
||
|
|
"""proxy a request to a CDN"""
|
||
|
|
proxy_url = "/".join([self.settings['cdn'], url])
|
||
|
|
client = self.settings['client']
|
||
|
|
response = yield client.fetch(proxy_url)
|
||
|
|
|
||
|
|
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,
|
||
|
|
help="""Should the browser be opened automatically?"""
|
||
|
|
).tag(config=True)
|
||
|
|
|
||
|
|
browser = Unicode(u'',
|
||
|
|
help="""Specify what browser should be used to open slides. See
|
||
|
|
https://docs.python.org/3/library/webbrowser.html#webbrowser.register
|
||
|
|
to see how keys are mapped to browser executables. If
|
||
|
|
not specified, the default browser will be determined
|
||
|
|
by the `webbrowser`
|
||
|
|
standard library module, which allows setting of the BROWSER
|
||
|
|
environment variable to override it.
|
||
|
|
""").tag(config=True)
|
||
|
|
|
||
|
|
reveal_cdn = Unicode("https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.5.0",
|
||
|
|
help="""URL for reveal.js CDN.""").tag(config=True)
|
||
|
|
reveal_prefix = Unicode("reveal.js",
|
||
|
|
help="URL prefix for reveal.js").tag(config=True)
|
||
|
|
ip = Unicode("127.0.0.1",
|
||
|
|
help="The IP address to listen on.").tag(config=True)
|
||
|
|
port = Int(8000, help="port for the server to listen on.").tag(config=True)
|
||
|
|
|
||
|
|
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
|
||
|
|
log.app_log = self.log
|
||
|
|
|
||
|
|
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:
|
||
|
|
try:
|
||
|
|
browser = webbrowser.get(self.browser or None)
|
||
|
|
b = lambda: browser.open(url, new=2)
|
||
|
|
threading.Thread(target=b).start()
|
||
|
|
except webbrowser.Error as e:
|
||
|
|
self.log.warning('No web browser found: %s.' % e)
|
||
|
|
browser = None
|
||
|
|
|
||
|
|
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])
|