new iOS/web extractors, image proxying done by views.py

- ythdd_globals.py - added helper function to get user-configured header
- ythdd.py - now checks for config.toml in work directory
- requirements.txt - add brotli, so that requests can decompress
innertube request

views.py

@@ -1,8 +1,9 @@
 #!/usr/bin/python3
-from flask import render_template
+from flask import render_template, Response
 from flask_sqlalchemy import SQLAlchemy
 from markupsafe import escape
 import requests, json
+import ythdd_globals
 
 def homepage():
 	return "homepage"
@@ -11,4 +12,32 @@ def home():
 	return "welcome home!"
 
 def index():
-	return "index"
+	return "index"
+
+def thumbnailProxy(received_request):
+
+	# apparently, this can be set to
+	# https://img.youtube.com/ as well
+	prefix = "https://i.ytimg.com/"
+
+	if received_request.count("/") < 1 or received_request.index("/") != 11:
+		return Response(json.dumps({
+			'status': 400, 
+			'error_msg': 'invalid request. pretend this is a thumbnail :D'
+			}), mimetype='application/json', status=400)
+
+	thumbnail = requests.get(prefix + "vi/" + received_request, headers=ythdd_globals.getHeaders(caller='proxy'), stream=True)
+	thumbnail.raw.decode_content = True
+	response = Response(thumbnail.raw, mimetype=thumbnail.headers['content-type'], status=thumbnail.status_code)
+
+	return response
+
+def ggphtProxy(received_request):
+
+	prefix = "https://yt3.ggpht.com/"
+
+	ggpht = requests.get(prefix + received_request, headers=ythdd_globals.getHeaders(caller='proxy'), stream=True)
+	ggpht.raw.decode_content = True
+	response = Response(ggpht.raw, mimetype=ggpht.headers['content-type'], status=ggpht.status_code)
+
+	return response