Migrate application to python3
Notables: - Python 3 migration - The client id is now set via environment variable instead of hardcoding it in a py file - Using Flask instead of web2 - Migrate away from Memcache (Google depeciated it in py3) to an in-memory data structure - Moved landing page to static serving
This commit is contained in:
Laszlo Zeke
parent
fc67ccba75
commit
5fccffc2f0
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@ -7,6 +7,7 @@ __pycache__/
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# Distribution / packaging
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.Python
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venv/
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env/
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build/
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develop-eggs/
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@ -1,6 +1,6 @@
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## Twitch RSS Webapp for Google App Engine
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This project is a very small web application for serving RSS feed for broadcasts
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in Twitch. It fetches data from [Twitch API](https://github.com/justintv/twitch-api) and caches in Memcache.
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in Twitch. It fetches data from [Twitch API](https://dev.twitch.tv/docs) and caches in Memcache.
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The engine is webapp2.
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A running version can be tried out at:
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@ -10,6 +10,7 @@ There is also a VOD only endpoint if you don't want to see ongoing streams which
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https://twitchrss.appspot.com/vodonly/twitch
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### Deployment
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First you should set your own Twitch API client ID in the app.yaml.
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See how to deploy on [Google App Engine](https://cloud.google.com/appengine/docs/python/gettingstartedpython27/introduction).
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### Other things
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@ -1,15 +1,21 @@
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runtime: python27
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threadsafe: true
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runtime: python38
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entrypoint: gunicorn -b :$PORT twitchrss:app
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env_variables:
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TWITCH_CLIENT_ID: __INSERT_TWITCH_CLIENT_ID_HERE__
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handlers:
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- url: /favicon\.ico
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static_files: favicon.ico
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upload: favicon\.ico
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- url: /.*
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script: twitchrss.app
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- url: /
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static_files: index.html
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upload: index\.html
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- url: /.+
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script: auto
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automatic_scaling:
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max_instances: 1
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max_idle_instances: 1
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@ -1,17 +0,0 @@
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#
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# Copyright 2017, 2016 Laszlo Zeke
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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TWITCH_CLIENT_ID = 'Insert_key_here'
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@ -1,6 +0,0 @@
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"""`appengine_config` gets loaded when starting a new application instance."""
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import vendor
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# insert `lib` as a site directory so our `main` module can load
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# third-party libraries, and override built-ins with newer
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# versions.
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vendor.add('lib')
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@ -1,6 +1,6 @@
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# Feedformatter
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# Copyright (c) 2008, Luke Maurits <luke@maurits.id.au>
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# Copyright (c) 2015, Laszlo Zeke
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# Copyright (c) 2020, Laszlo Zeke
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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@ -28,7 +28,7 @@
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__version__ = "0.4"
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from cStringIO import StringIO
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from io import StringIO
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# This "staircase" of import attempts is ugly. If there's a nicer way to do
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# this, please let me know!
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@ -75,7 +75,7 @@ _rss2_channel_mappings = (
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(("title",), "title"),
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(("link", "url"), "link"),
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(("description", "desc", "summary"), "description"),
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(("pubDate", "pubdate", "date", "published", "updated"), "pubDate", lambda(x): _format_datetime("rss2",x)),
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(("pubDate", "pubdate", "date", "published", "updated"), "pubDate", lambda x: _format_datetime("rss2",x)),
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(("category",), "category"),
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(("language",), "language"),
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(("copyright",), "copyright"),
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@ -91,9 +91,9 @@ _rss2_item_mappings = (
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(("link", "url"), "link"),
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(("description", "desc", "summary"), "description"),
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(("guid", "id"), "guid"),
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(("pubDate", "pubdate", "date", "published", "updated"), "pubDate", lambda(x): _format_datetime("rss2",x)),
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(("pubDate", "pubdate", "date", "published", "updated"), "pubDate", lambda x: _format_datetime("rss2",x)),
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(("category",), "category"),
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(("author",), "author", lambda(x): _rssify_author(x))
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(("author",), "author", lambda x: _rssify_author(x))
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)
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# Atom 1.0 ----------
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@ -102,19 +102,19 @@ _atom_feed_mappings = (
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(("title",), "title"),
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(("link", "url"), "id"),
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(("description", "desc", "summary"), "subtitle"),
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(("pubDate", "pubdate", "date", "published", "updated"), "pubDate", lambda(x): _format_datetime("atom",x)),
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(("pubDate", "pubdate", "date", "published", "updated"), "pubDate", lambda x: _format_datetime("atom",x)),
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(("category",), "category"),
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(("author",), "author", lambda(x): _atomise_author(x))
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(("author",), "author", lambda x: _atomise_author(x))
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)
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_atom_item_mappings = (
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(("title",), "title"),
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(("link", "url"), "id"),
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(("link", "url"), "link", lambda(x): _atomise_link(x)),
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(("link", "url"), "link", lambda x: _atomise_link(x)),
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(("description", "desc", "summary"), "summary"),
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(("pubDate", "pubdate", "date", "published", "updated"), "pubDate", lambda(x): _format_datetime("atom",x)),
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(("pubDate", "pubdate", "date", "published", "updated"), "pubDate", lambda x: _format_datetime("atom",x)),
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(("category",), "category"),
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(("author",), "author", lambda(x): _atomise_author(x))
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(("author",), "author", lambda x: _atomise_author(x))
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)
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def _get_tz_offset():
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@ -472,11 +472,11 @@ def main():
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item["guid"] = "1234567890"
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feed.items.append(item)
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print("---- RSS 1.0 ----")
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print feed.format_rss1_string(pretty=True)
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print(feed.format_rss1_string(pretty=True))
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print("---- RSS 2.0 ----")
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print feed.format_rss2_string(pretty=True)
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print(feed.format_rss2_string(pretty=True))
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print("---- Atom 1.0 ----")
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print feed.format_atom_string(pretty=True)
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print(feed.format_atom_string(pretty=True))
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if __name__ == "__main__":
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main()
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@ -0,0 +1,17 @@
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<html>
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<head>
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<title>Twitch stream RSS generator</title>
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</head>
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<body>
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<p style="font-family: helvetica; font-size:20pt; padding: 20px;">
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Twitch stream RSS generator
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</p>
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<p style="font-family: helvetica; font-size:12pt; padding: 20px;">
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You can get RSS of broadcasts by subscribing to https://twitchrss.appspot.com/vod/<channel name><br/>
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For example: <a href="https://twitchrss.appspot.com/vod/riotgames">https://twitchrss.appspot.com/vod/riotgames</a><br/><br/>
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You can use the /vodonly handle to get only vods without ongoing streams.
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Not endorsed by Twitch.tv, just a fun project.<br/>
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<a href="https://github.com/lzeke0/TwitchRSS">Project home</a>
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</p>
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</body>
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</html>
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@ -0,0 +1,31 @@
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appdirs==1.4.3
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CacheControl==0.12.6
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certifi==2019.11.28
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chardet==3.0.4
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click==7.1.2
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colorama==0.4.3
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contextlib2==0.6.0
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distlib==0.3.0
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distro==1.4.0
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expiringdict==1.2.1
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Flask==1.1.2
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gunicorn==20.0.4
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html5lib==1.0.1
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idna==2.8
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ipaddr==2.2.0
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itsdangerous==1.1.0
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Jinja2==2.11.2
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lockfile==0.12.2
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MarkupSafe==1.1.1
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msgpack==0.6.2
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packaging==20.3
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pep517==0.8.2
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progress==1.5
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pyparsing==2.4.6
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pytoml==0.1.21
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requests==2.22.0
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retrying==1.3.3
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six==1.14.0
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urllib3==1.25.8
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webencodings==0.5.1
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Werkzeug==1.0.1
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@ -1,5 +1,5 @@
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#
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# Copyright 2017, 2016 Laszlo Zeke
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# Copyright 2020 Laszlo Zeke
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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@ -14,104 +14,82 @@
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# limitations under the License.
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#
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import webapp2
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from webapp2 import Route
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import urllib2
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from flask import abort, Flask
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import urllib
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import json
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import datetime
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import logging
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import re
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from os import environ
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from feedformatter import Feed
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from google.appengine.api import memcache
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from app_id import TWITCH_CLIENT_ID
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from StringIO import StringIO
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from expiringdict import ExpiringDict
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from io import BytesIO
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import gzip
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VODCACHE_PREFIX = 'vodcache'
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USERIDCACHE_PREFIX = 'userid'
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VOD_URL_TEMPLATE = 'https://api.twitch.tv/kraken/channels/%s/videos?broadcast_type=archive,highlight,upload&limit=10'
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USERID_URL_TEMPLATE = 'https://api.twitch.tv/kraken/users?login=%s'
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VODCACHE_LIFETIME = 600
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USERIDCACHE_LIFETIME = 0 # No expire
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USERIDCACHE_LIFETIME = 24 * 60 * 60
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CHANNEL_FILTER = re.compile("^[a-zA-Z0-9_]{2,25}$")
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TWITCH_CLIENT_ID = environ.get("TWITCH_CLIENT_ID")
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logging.basicConfig(level=logging.DEBUG if environ.get('DEBUG') else logging.INFO)
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if not TWITCH_CLIENT_ID:
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raise Exception("Twitch API client id is not set.")
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class MainPage(webapp2.RequestHandler):
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def get(self):
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self.response.headers['Content-Type'] = 'text/html'
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html_resp = """
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<html>
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<head>
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<title>Twitch stream RSS generator</title>
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</head>
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<body>
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<p style="font-family: helvetica; font-size:20pt; padding: 20px;">
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Twitch stream RSS generator
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</p>
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<p style="font-family: helvetica; font-size:12pt; padding: 20px;">
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You can get RSS of broadcasts by subscribing to https://twitchrss.appspot.com/vod/<channel name><br/>
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For example: <a href="https://twitchrss.appspot.com/vod/riotgames">https://twitchrss.appspot.com/vod/riotgames</a><br/><br/>
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You can use the /vodonly handle to get only vods without ongoing streams.
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Not endorsed by Twitch.tv, just a fun project.<br/>
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<a href="https://github.com/lzeke0/TwitchRSS">Project home</a>
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</p>
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</body>
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</html>
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"""
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self.response.write(html_resp)
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app = Flask(__name__)
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vodcache = ExpiringDict(max_len=200, max_age_seconds=VODCACHE_LIFETIME)
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useridcache = ExpiringDict(max_len=1000, max_age_seconds=USERIDCACHE_LIFETIME)
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class RSSVoDServer(webapp2.RequestHandler):
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def get(self, channel):
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self._get_inner(channel)
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def _get_inner(self, channel, add_live=True):
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userid_json = self.fetch_userid(channel)
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(channel_display_name, channel_id) = self.extract_userid(json.loads(userid_json))
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channel_json = self.fetch_vods(channel_id)
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decoded_json = json.loads(channel_json)
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rss_data = self.construct_rss(channel, decoded_json, channel_display_name, add_live)
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self.response.headers['Content-Type'] = 'application/rss+xml'
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self.response.write(rss_data)
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def head(self,channel):
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self.get(channel)
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def fetch_userid(self, channel_name):
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return self.fetch_or_cache_object(channel_name, USERIDCACHE_PREFIX, USERID_URL_TEMPLATE, USERIDCACHE_LIFETIME)
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def fetch_vods(self, channel_id):
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return self.fetch_or_cache_object(channel_id, VODCACHE_PREFIX, VOD_URL_TEMPLATE, VODCACHE_LIFETIME)
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def fetch_or_cache_object(self, channel, key_prefix, url_template, cache_time):
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json_data = self.lookup_cache(channel, key_prefix)
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if not json_data:
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json_data = self.fetch_json(channel, url_template)
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if not json_data:
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self.abort(404)
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@app.route('/vod/<string:channel>', methods=['GET', 'HEAD'])
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def vod(channel):
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if CHANNEL_FILTER.match(channel):
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return get_inner(channel)
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else:
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self.store_cache(channel, json_data, key_prefix, cache_time)
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abort(404)
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@app.route('/vodonly/<string:channel>', methods=['GET', 'HEAD'])
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def vodonly(channel):
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if CHANNEL_FILTER.match(channel):
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return get_inner(channel, add_live=False)
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else:
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abort(404)
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def get_inner(channel, add_live=True):
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userid_json = fetch_userid(channel)
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(channel_display_name, channel_id) = extract_userid(json.loads(userid_json))
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channel_json = fetch_vods(channel_id)
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decoded_json = json.loads(channel_json)
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rss_data = construct_rss(channel, decoded_json, channel_display_name, add_live)
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headers = {'Content-Type': 'application/rss+xml'}
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return rss_data, headers
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def fetch_userid(channel_name):
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return fetch_or_cache_object(channel_name, useridcache, USERID_URL_TEMPLATE)
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def fetch_vods(channel_id):
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return fetch_or_cache_object(channel_id, vodcache, VOD_URL_TEMPLATE)
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def fetch_or_cache_object(key, cachedict, url_template):
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json_data = cachedict.get(key)
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if not json_data:
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json_data = fetch_json(key, url_template)
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if not json_data:
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abort(404)
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else:
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cachedict[key] = json_data
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return json_data
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@staticmethod
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def lookup_cache(channel_name, key_prefix):
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cached_data = memcache.get('%s:v5:%s' % (key_prefix, channel_name))
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if cached_data is not None:
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logging.debug('Cache hit for %s' % channel_name)
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return cached_data
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else:
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logging.debug('Cache miss for %s' % channel_name)
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return ''
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@staticmethod
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def store_cache(channel_name, data, key_prefix, cache_lifetime):
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try:
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logging.debug('Cached data for %s' % channel_name)
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memcache.set('%s:v5:%s' % (key_prefix, channel_name), data, cache_lifetime)
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except BaseException as e:
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logging.warning('Memcache exception: %s' % e)
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return
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@staticmethod
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def fetch_json(id, url_template):
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url = url_template % id
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headers = {
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@ -119,28 +97,29 @@ class RSSVoDServer(webapp2.RequestHandler):
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'Client-ID': TWITCH_CLIENT_ID,
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'Accept-Encoding': 'gzip'
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}
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request = urllib2.Request(url, headers=headers)
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request = urllib.request.Request(url, headers=headers)
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retries = 0
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while retries < 3:
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try:
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result = urllib2.urlopen(request, timeout=3)
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result = urllib.request.urlopen(request, timeout=3)
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logging.debug('Fetch from twitch for %s with code %s' % (id, result.getcode()))
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if result.info().get('Content-Encoding') == 'gzip':
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logging.debug('Fetched gzip content')
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buf = StringIO(result.read())
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buf = BytesIO(result.read())
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f = gzip.GzipFile(fileobj=buf)
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return f.read()
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return result.read()
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except BaseException as e:
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except Exception as e:
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logging.warning("Fetch exception caught: %s" % e)
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retries += 1
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return ''
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return None
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def extract_userid(self, user_info):
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def extract_userid(user_info):
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userlist = user_info.get('users')
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if not userlist:
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logging.info('No such user found.')
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self.abort(404)
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abort(404)
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# Get the first id in the list
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userid = userlist[0].get('_id')
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username = userlist[0].get('display_name')
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@ -148,15 +127,16 @@ class RSSVoDServer(webapp2.RequestHandler):
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return username, userid
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else:
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logging.warning('Userid is not found in %s' % user_info)
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self.abort(404)
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abort(404)
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def construct_rss(self, channel_name, vods_info, display_name, add_live=True):
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||||
|
||||
def construct_rss(channel_name, vods_info, display_name, add_live=True):
|
||||
feed = Feed()
|
||||
|
||||
# Set the feed/channel level properties
|
||||
feed.feed["title"] = "%s's Twitch video RSS" % display_name
|
||||
feed.feed["link"] = "https://twitchrss.appspot.com/"
|
||||
feed.feed["author"] = "Twitch RSS Gen"
|
||||
feed.feed["author"] = "Twitch RSS Generated"
|
||||
feed.feed["description"] = "The RSS Feed of %s's videos on Twitch" % display_name
|
||||
feed.feed["ttl"] = '10'
|
||||
|
||||
|
|
@ -189,17 +169,11 @@ class RSSVoDServer(webapp2.RequestHandler):
|
|||
feed.items.append(item)
|
||||
except KeyError as e:
|
||||
logging.warning('Issue with json: %s\nException: %s' % (vods_info, e))
|
||||
self.abort(404)
|
||||
abort(404)
|
||||
|
||||
return feed.format_rss2_string()
|
||||
|
||||
class RSSVoDServerOnlyVoD(RSSVoDServer):
|
||||
def get(self, channel):
|
||||
self._get_inner(channel, add_live=False)
|
||||
|
||||
|
||||
app = webapp2.WSGIApplication([
|
||||
Route('/', MainPage),
|
||||
Route('/vod/<channel:[a-zA-Z0-9_]{2,25}>', RSSVoDServer),
|
||||
Route('/vodonly/<channel:[a-zA-Z0-9_]{2,25}>', RSSVoDServerOnlyVoD)
|
||||
], debug=False)
|
||||
# For debug
|
||||
if __name__ == "__main__":
|
||||
app.run(host='127.0.0.1', port=8080, debug=True)
|
||||
|
|
|
|||
|
|
@ -1,71 +0,0 @@
|
|||
#
|
||||
# Copyright 2014 Jon Wayne Parrott, [proppy], Michael R. Bernstein
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
#
|
||||
|
||||
# Notes:
|
||||
# - Imported from https://github.com/jonparrott/Darth-Vendor/.
|
||||
# - Added license header.
|
||||
# - Renamed `darth.vendor` to `vendor.add` to match upcoming SDK interface.
|
||||
# - Renamed `position` param to `index` to match upcoming SDK interface.
|
||||
# - Removed funny arworks docstring.
|
||||
|
||||
import site
|
||||
import os.path
|
||||
import sys
|
||||
|
||||
|
||||
def add(folder, index=1):
|
||||
"""
|
||||
Adds the given folder to the python path. Supports namespaced packages.
|
||||
By default, packages in the given folder take precedence over site-packages
|
||||
and any previous path manipulations.
|
||||
|
||||
Args:
|
||||
folder: Path to the folder containing packages, relative to ``os.getcwd()``
|
||||
position: Where in ``sys.path`` to insert the vendor packages. By default
|
||||
this is set to 1. It is inadvisable to set it to 0 as it will override
|
||||
any modules in the current working directory.
|
||||
"""
|
||||
|
||||
# Check if the path contains a virtualenv.
|
||||
site_dir = os.path.join(folder, 'lib', 'python' + sys.version[:3], 'site-packages')
|
||||
if os.path.exists(site_dir):
|
||||
folder = site_dir
|
||||
# Otherwise it's just a normal path, make it absolute.
|
||||
else:
|
||||
folder = os.path.join(os.path.dirname(__file__), folder)
|
||||
|
||||
# Use site.addsitedir() because it appropriately reads .pth
|
||||
# files for namespaced packages. Unfortunately, there's not an
|
||||
# option to choose where addsitedir() puts its paths in sys.path
|
||||
# so we have to do a little bit of magic to make it play along.
|
||||
|
||||
# We're going to grab the current sys.path and split it up into
|
||||
# the first entry and then the rest. Essentially turning
|
||||
# ['.', '/site-packages/x', 'site-packages/y']
|
||||
# into
|
||||
# ['.'] and ['/site-packages/x', 'site-packages/y']
|
||||
# The reason for this is we want '.' to remain at the top of the
|
||||
# list but we want our vendor files to override everything else.
|
||||
sys.path, remainder = sys.path[:1], sys.path[1:]
|
||||
|
||||
# Now we call addsitedir which will append our vendor directories
|
||||
# to sys.path (which was truncated by the last step.)
|
||||
site.addsitedir(folder)
|
||||
|
||||
# Finally, we'll add the paths we removed back.
|
||||
# The final product is something like this:
|
||||
# ['.', '/vendor-folder', /site-packages/x', 'site-packages/y']
|
||||
sys.path.extend(remainder)
|
||||
Loading…
Reference in New Issue