Update main.py

main.py

@@ -1,33 +1,47 @@
-from fastapi import FastAPI
-from playwright.async_api import async_playwright
 import os
+from fastapi import FastAPI
+from playwright.sync_api import sync_playwright
+#   ↑ 同期版だと "It looks like you are using Playwright Sync API inside the asyncio loop" 
+#     と怒られる場合がある。
+#     その場合は下記の async版を使い、エンドポイントも async def にする。
+# from playwright.async_api import async_playwright
 
 app = FastAPI()
 
-@app.on_event("startup")
-async def on_startup():
-    print("===== Application Startup =====")
+@app.get("/")
+def read_root():
+    return {
+        "message": "Visit /save_mhtml to capture MHTML. Then check the dev mode to see if the file is there."
+    }
+
+@app.get("/save_mhtml")
+def save_mhtml():
+    """
+    /save_mhtml にアクセスしたタイミングで外部URLを読み込み、MHTMLを保存する。
+    ここで失敗しても起動時には関係ないので、Devモードが落ちるリスクが減る。
+    """
     url = "https://civitai.com/models/1055452/akashicpulse"
     output_path = "akashicpulse.mhtml"
 
     try:
-        async with async_playwright() as p:
-            browser = await p.chromium.launch(headless=True)
-            page = await browser.new_page()
-            await page.goto(url, wait_until="networkidle")
+        with sync_playwright() as p:
+            browser = p.chromium.launch(headless=True)
+            page = browser.new_page()
+            page.goto(url, wait_until="networkidle", timeout=60000)
 
-            cdp_session = await page.context.new_cdp_session(page)
-            snapshot = await cdp_session.send("Page.captureSnapshot", {"format": "mhtml"})
-
-            await browser.close()
+            cdp_session = page.context.new_cdp_session(page)
+            snapshot = cdp_session.send("Page.captureSnapshot", {"format": "mhtml"})
+            browser.close()
 
         with open(output_path, "w", encoding="utf-8") as f:
             f.write(snapshot)
 
-        print(f"[INFO] MHTML saved to {os.path.abspath(output_path)}")
+        return {
+            "status": "success",
+            "message": f"MHTML saved to {os.path.abspath(output_path)}"
+        }
     except Exception as e:
-        print(f"[ERROR] Failed to save MHTML: {e}")
-
-@app.get("/")
-def read_root():
-    return {"message": "Check logs for MHTML creation results."}
+        return {
+            "status": "error",
+            "message": str(e)
+        }