changed error page, MASSIVE new sound extension added with working YouTube duration, preparation and streaming API steps, wsgi random comment removal

app/sound.py

@@ -0,0 +1,90 @@
+from app import app
+from flask import send_file, redirect, url_for, render_template
+from mutagen.mp3 import MP3
+import os
+import re
+import json
+import subprocess
+
+# Services => Expected Data
+# YouTube => Video ID
+# Soundcloud =>
+
+# Filenaming/API Convention Examples
+# Original URL/URI => API Path => Connected File
+# https://www.youtube.com/watch?v=awtYiVGXiaY => /stream/youtube/awtYiVGXiaY => youtube/awtYiVGXiaY.mp3
+# https://soundcloud.com/yungraredeath/fall-in-line-w-kxng-prod-mars-mission => /stream/soundcloud/fall-in-line-w-kxng-prod-mars-mission---yungraredeath => soundcloud/fall-in-line-w-kxng-prod-mars-mission---yungraredeath.mp3
+# spotify:track:16PmczUxlX7dpr6ror6pXd => /duration/spotify/16PmczUxlX7dpr6ror6pXd => spotify/16PmczUxlX7dpr6ror6pXd.mp3
+
+class YouTubeHandler:
+    @staticmethod
+    def url(videoid):
+        return f'https://www.youtube.com/watch?v={videoid}'
+
+    @staticmethod
+    def getConfig(videoid):
+        with open(os.path.join('app', 'sounds', 'filenames.json'), 'r') as file:
+            return json.load(file)['youtube'][videoid]
+
+    @staticmethod
+    def filename(videoid):
+        try:
+            config = YouTubeHandler.getConfig(videoid)
+            return config['filename']
+        except KeyError:
+            filename = subprocess.run(
+                ['youtube-dl', '-x', '--audio-format', 'mp3', '--restrict-filenames', '--get-filename',
+                YouTubeHandler.url(videoid)], encoding='utf-8', capture_output=True).stdout
+            filename = filename.split('.')
+            filename[-1] = 'mp3'
+            return '.'.join(filename)
+
+    @staticmethod
+    def path(videoid):
+        try:
+            config = YouTubeHandler.getConfig(videoid)
+            return config['path']
+        except KeyError:
+            filename = YouTubeHandler.filename(videoid)
+            path = os.path.join('app', 'sounds', 'youtube', filename)
+            with open(os.path.join('app', 'sounds', 'filenames.json'), 'r+') as file:
+                config = json.load(file)
+                config['youtube'][videoid] = {
+                    "filename" : filename,
+                    "path" : path
+                }
+                file.seek(0)
+                file.write(json.dumps(config))
+                file.truncate()
+            return path
+            
+    @staticmethod
+    def download(videoid):
+        config = YouTubeHandler.getConfig(videoid)
+        if not os.path.exists(config['path']):
+            subprocess.run(['youtube-dl', '-x', '--restrict-filenames', '--audio-format', 'mp3', YouTubeHandler.url(videoid)])
+            print(os.listdir('.'))
+            os.rename(config['filename'], config['path'])
+
+service_functions = {
+    'youtube' : YouTubeHandler,
+    'spotify' : {'url' : None, 'path' : None},
+    'soundcloud' : {'url' : None, 'path' : None}
+}
+
+# Streams a prepared MP3 back to the client
+@app.route('/stream/<service>/<mediaid>')
+def stream(service, mediaid):
+    prepare(service, mediaid)
+    if service == 'youtube':
+        config = YouTubeHandler.getConfig(mediaid)
+        return send_file(os.path.join(os.path.dirname(__file__), '..', config['path']), attachment_filename=config['filename'])
+    return '???'
+    
+# Prepares a URL for download, returning the duration it should play for if streamed
+@app.route('/prepare/<service>/<mediaid>')
+def prepare(service, mediaid):
+    filepath = service_functions[service].path(mediaid)
+    service_functions[service].download(mediaid)
+    print(filepath)
+    return str(MP3(filepath).info.length)