Fix max thread to 10 because au pool size

src/main.py

@@ -1,3 +1,4 @@
+import asyncio
 import logging
 import os
 from shlex import join
@@ -55,8 +56,13 @@ async def pixivprev(interaction: discord.Interaction, url: str):
     if result and match is not None:
         await interaction.response.defer()
         with TemporaryDirectory() as tmp_dir:
-            data = pixiv_api.dowload_pixiv_images(
-                int(match.group("id")), tmp_dir, REFRESH_TOKEN
+            loop = asyncio.get_running_loop()
+            data = await loop.run_in_executor(
+                None,
+                pixiv_api.dowload_pixiv_images,
+                int(match.group("id")),
+                tmp_dir,
+                REFRESH_TOKEN,
             )
             if data is None:
                 await interaction.response.send_message(
@@ -86,8 +92,13 @@ async def pixiv_preview(interaction: discord.Interaction, message: discord.Messa
     if result and match is not None:
         await interaction.response.defer()
         with TemporaryDirectory() as tmp_dir:
-            data = pixiv_api.dowload_pixiv_images(
-                int(match.group("id")), tmp_dir, REFRESH_TOKEN
+            loop = asyncio.get_running_loop()
+            data = await loop.run_in_executor(
+                None,
+                pixiv_api.dowload_pixiv_images,
+                int(match.group("id")),
+                tmp_dir,
+                REFRESH_TOKEN,
             )
             if data is None:
                 await interaction.response.send_message(
@@ -126,8 +137,13 @@ async def on_message(message: discord.Message):
     if result and match is not None:
         with TemporaryDirectory() as tmp_dir:
             async with message.channel.typing():
-                data = pixiv_api.dowload_pixiv_images(
-                    int(match.group("id")), tmp_dir, REFRESH_TOKEN
+                loop = asyncio.get_running_loop()
+                data = await loop.run_in_executor(
+                    None,
+                    pixiv_api.dowload_pixiv_images,
+                    int(match.group("id")),
+                    tmp_dir,
+                    REFRESH_TOKEN,
                 )
                 if data is None:
                     return

src/pixiv/pixiv_api.py

@@ -9,6 +9,8 @@ import pixivpy3
 
 cpu_count = os.cpu_count()
 max_thread_num = cpu_count * 2 if cpu_count is not None else 4
+if max_thread_num > 10:
+    max_thread_num = 10
 
 
 def dowload_pixiv_images(
@@ -22,6 +24,7 @@ def dowload_pixiv_images(
     json_result = api.illust_detail(illust_id)
     illust = json_result.illust
     if not illust["visible"]:
+        logging.info("Can't be viewed, return None")
         return None
     pages = illust["meta_pages"]
     if len(pages) > 0: