Get stream title from disk

By default from `title.txt`. Also replace newlines with spaces when setting the
title in js, for parity with the nojs info iframe.

.gitignore

@@ -1,3 +1,4 @@
 __pycache__/
 stream/
 *~
+title.txt

anonstream/__init__.py

@@ -32,6 +32,8 @@ def create_app(config_file):
         'SEGMENT_SEARCH_COOLDOWN': config['segments']['search_cooldown'],
         'SEGMENT_SEARCH_TIMEOUT': config['segments']['search_timeout'],
         'SEGMENT_STREAM_INITIAL_BUFFER': config['segments']['stream_initial_buffer'],
+        'STREAM_TITLE': config['title']['file'],
+        'STREAM_TITLE_CACHE_LIFETIME': config['title']['file_cache_lifetime'],
         'DEFAULT_HOST_NAME': config['names']['broadcaster'],
         'DEFAULT_ANON_NAME': config['names']['anonymous'],
         'MAX_STATES': config['memory']['states'],

anonstream/routes/nojs.py

@@ -19,7 +19,7 @@ async def nojs_info(user):
     return await render_template(
         'nojs_info.html',
         user=user,
-        title=get_stream_title(),
+        title=await get_stream_title(),
         uptime=get_stream_uptime(),
     )
 

anonstream/static/anonstream.js

@@ -316,6 +316,12 @@ const disable_captcha = () => {
   chat_form_captcha_image.removeAttribute("src");
 }
 
+const set_title = (title) => {
+  const element = document.createElement("h1");
+  element.innerText = title.replaceAll(/\r?\n/g, " ");
+  info_title.innerHTML = element.outerHTML;
+}
+
 let frozen_uptime = null;
 let frozen_uptime_received = null;
 const set_frozen_uptime = (x) => {
@@ -357,7 +363,7 @@ const on_websocket_message = (event) => {
     case "init":
       console.log("ws init", receipt);
 
-      info_title.innerText = receipt.title;
+      set_title(receipt.title);
       set_frozen_uptime(receipt.uptime);
       update_uptime();
 
@@ -395,7 +401,7 @@ const on_websocket_message = (event) => {
 
     case "title":
       console.log("ws title", receipt);
-      info_title.innerText = receipt.title;
+      set_title(receipt.title);
       break;
 
     case "ack":

anonstream/static/style.css

@@ -68,8 +68,10 @@ noscript {
   float: right;
   font-size: 11pt;
 }
-#info_js__title {
+#info_js__title > h1 {
+  margin: 0;
   font-size: 18pt;
+  line-height: 1.125;
   overflow-wrap: anywhere;
 }
 #info_nojs {

anonstream/stream.py

@@ -1,9 +1,21 @@
 import time
 
+import aiofiles
+from quart import current_app
+
 from anonstream.segments import get_playlist, Offline
+from anonstream.wrappers import ttl_cache_async
+
+CONFIG = current_app.config
 
-def get_stream_title():
-    return 'Stream title'
+@ttl_cache_async(CONFIG['STREAM_TITLE_CACHE_LIFETIME'])
+async def get_stream_title():
+    try:
+        async with aiofiles.open(CONFIG['STREAM_TITLE']) as fp:
+            title = await fp.read(8192)
+    except FileNotFoundError:
+        title = ''
+    return title
 
 def get_stream_uptime(rounded=True):
     try:

anonstream/templates/nojs_info.html

@@ -16,6 +16,7 @@
     #title > h1 {
       margin: 0;
       font-size: 18pt;
+      line-height: 1.125;
       overflow-wrap: anywhere;
     }
   </style>

anonstream/websocket.py

@@ -15,7 +15,7 @@ async def websocket_outbound(queue, user):
     payload = {
         'type': 'init',
         'nonce': generate_nonce(),
-        'title': get_stream_title(),
+        'title': await get_stream_title(),
         'uptime': get_stream_uptime(),
         'messages': get_all_messages_for_websocket(),
         'users': get_all_users_for_websocket(),

anonstream/wrappers.py

@@ -53,3 +53,24 @@ def ttl_cache(ttl):
         return wrapper
 
     return ttl_cache_specific
+
+def ttl_cache_async(ttl):
+    '''
+    Async version of `ttl_cache`. Wraps zero-argument coroutines.
+    '''
+    def ttl_cache_specific(f):
+        value, expires = None, None
+
+        @wraps(f)
+        async def wrapper():
+            nonlocal value, expires
+
+            if expires is None or time.monotonic() >= expires:
+                value = await f()
+                expires = time.monotonic() + ttl
+
+            return value
+
+        return wrapper
+
+    return ttl_cache_specific

config.toml

@@ -12,6 +12,10 @@ search_cooldown = 0.25
 search_timeout = 5.0
 stream_initial_buffer = 3
 
+[title]
+file = "title.txt"
+file_cache_lifetime = 0.5
+
 [captcha]
 lifetime = 1800
 fonts = []

title.txt

@@ -0,0 +1 @@
+Lorem ipsum dolor sit amet