Fix Playwright async API compatibility

app.py

@@ -9,7 +9,7 @@ from fastapi import FastAPI, HTTPException, File, UploadFile
 from fastapi.responses import JSONResponse, RedirectResponse
 from fastapi.middleware.cors import CORSMiddleware
 from pydantic import BaseModel
-from playwright.sync_api import sync_playwright
+from playwright.async_api import async_playwright
 from huggingface_hub import HfApi, upload_file
 
 
@@ -24,10 +24,10 @@ class PDFResponse(BaseModel):
     repository_url: str
 
 
-def html_to_pdf_api(html_content: str) -> tuple[str, str]:
+async def html_to_pdf_api(html_content: str) -> tuple[str, str]:
     """
     HTMLコンテンツをPDFに変換してHugging Faceデータセットリポジトリにアップロード
-    knowledge.txtのPlaywright手法を使用
+    knowledge.txtのPlaywright手法を使用（Async版）
     """
     try:
         # 環境変数からリポジトリ情報を取得
@@ -48,26 +48,26 @@ def html_to_pdf_api(html_content: str) -> tuple[str, str]:
         with tempfile.NamedTemporaryFile(suffix=".pdf", delete=False) as temp_file:
             temp_path = temp_file.name
             
-            # Playwrightでヘッドレスブラウザを起動
-            with sync_playwright() as pw:
-                browser = pw.chromium.launch(headless=True)
-                page = browser.new_page()
+            # Playwrightでヘッドレスブラウザを起動（Async版）
+            async with async_playwright() as pw:
+                browser = await pw.chromium.launch(headless=True)
+                page = await browser.new_page()
                 
                 # HTMLコンテンツを設定（外部リソース読み込み待機）
-                page.set_content(html_content, wait_until="networkidle")
+                await page.set_content(html_content, wait_until="networkidle")
                 
                 # 印刷メディアを有効にする
-                page.emulate_media(media="print")
+                await page.emulate_media(media="print")
                 
                 # PDFを生成（test.htmlの設定に準拠）
-                page.pdf(
+                await page.pdf(
                     path=temp_path,
                     format="A4",
                     print_background=True,
                     margin={"top":"15mm","bottom":"15mm","left":"15mm","right":"15mm"}
                 )
                 
-                browser.close()
+                await browser.close()
             
             # Hugging Face リポジトリにアップロード
             api = HfApi(token=hf_token)
@@ -151,7 +151,7 @@ async def convert_html_to_pdf(request: HTMLRequest):
         raise HTTPException(status_code=400, detail="HTMLコンテンツが空です")
     
     try:
-        filename, pdf_url = html_to_pdf_api(request.html_content)
+        filename, pdf_url = await html_to_pdf_api(request.html_content)
         hf_repo_id = os.getenv("HF_DATASET_REPO_ID")
         repository_url = f"https://huggingface.co/datasets/{hf_repo_id}"