add proxy support

stream.py

@@ -3,6 +3,7 @@ import streamlink
 import tornado.web
 import tornado.routing
 import requests
+import os
 
 providers = {}
 providers["nrk"] = "https://tv.nrk.no"
@@ -10,11 +11,24 @@ providers["svt"] = "https://svtplay.se"
 providers["youtube"] = "https://youtu.be"
 providers["twitch"] = "https://twitch.tv"
 
+proxies = {}
+proxies["nrk"] = streamlink.Streamlink()
+proxies["svt"] = streamlink.Streamlink()
+proxies["youtube"] = streamlink.Streamlink()
+proxies["twitch"] = streamlink.Streamlink()
+
+for key in proxies:
+    proxy = os.environ.get(key.upper() + "_PROXY")
+    proxies[key].set_option("http-timeout", 2.0)
+    if proxy is not None:
+        proxies[key].set_option("https-proxy", proxy)
+
 class MainHandler(tornado.web.RequestHandler):
     def get(self):
         provider = self.get_query_argument("provider", None)
         endpoint = None
         if provider is not None and provider in providers.keys():
+            proxy = proxies.get(provider)
             src = providers[provider] + self.request.uri
             try:
                 resp = requests.get(src)
@@ -25,7 +39,7 @@ class MainHandler(tornado.web.RequestHandler):
                 return
             else:
                 try:
-                    streams = streamlink.streams(src)
+                    streams = proxy.streams(src)
                     for key in reversed(streams):
                         stream = streams.get(key)
                         if hasattr(stream, "url"):