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Difyの不具合修正 #162

Merged
merged 1 commit into from
Sep 27, 2024
Merged

Difyの不具合修正 #162

merged 1 commit into from
Sep 27, 2024

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tegnike
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@tegnike tegnike commented Sep 27, 2024

Summary by CodeRabbit

  • 新機能
    • ストリーミングレスポンスの処理を改善しました。バッファを使用して不完全な行を保持し、データの損失を防ぎます。
  • バグ修正
    • JSON解析時のエラーハンドリングを追加し、発生したエラーをログに記録します。

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coderabbitai bot commented Sep 27, 2024

Walkthrough

このプルリクエストでは、getDifyChatResponseStream関数のストリーミングレスポンス処理が改善されました。元の実装では、レスポンスストリームから直接テキストチャンクをデコードして処理し、行に分割して「data:」で始まるものをフィルタリングしていました。新しい実装では、デコードされたテキストチャンクを蓄積するバッファが導入され、不完全な行を処理できるようになりました。これにより、データの損失を防ぎつつ、各完全な行が「data:」プレフィックスをチェックされ、JSON文字列が解析されます。エラーハンドリングも追加され、JSON解析中のエラーがログに記録されます。

Changes

ファイル 変更の概要
src/features/chat/difyChat.ts getDifyChatResponseStream関数のストリーミングレスポンス処理を改善。バッファを導入し、不完全な行を保持しながらデータを処理。JSON解析のエラーハンドリングを追加。

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant Server
    participant Buffer

    Client->>Server: リクエスト送信
    Server->>Buffer: ストリーミングレスポンス送信
    Buffer->>Buffer: テキストチャンクを蓄積
    Buffer->>Buffer: 完全な行をチェック
    Buffer->>Buffer: JSON解析
    Buffer->>Client: 完全なレスポンスを返す
    Buffer->>Buffer: エラーがあればログ記録
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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (1)
src/features/chat/difyChat.ts (1)

Line range hint 79-88: start 関数内での不適切な ReadableStream の返却

start(controller) 関数内の catch ブロックで新たな ReadableStream を返そうとしていますが、これは正しくありません。start 関数内では新たな ReadableStream を返すことはできません。代わりに、既存の controller を使ってエラーメッセージを enqueue し、controller.close() を呼び出すべきです。

修正案:

} catch (error) {
  console.error(`Error fetching Dify API response:`, error)

-  return new ReadableStream({
-    start(controller) {
-      const errorMessage = handleApiError('AIAPIError')
-      controller.enqueue(errorMessage)
-      controller.close()
-    },
-  })
+  const errorMessage = handleApiError('AIAPIError')
+  controller.enqueue(errorMessage)
+  controller.close()
} finally {
  reader.releaseLock()
}
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 0fc3273 and 770c236.

📒 Files selected for processing (1)
  • src/features/chat/difyChat.ts (1 hunks)
🔇 Additional comments (2)
src/features/chat/difyChat.ts (2)

50-61: ストリームデータのバッファリングと分割処理は適切です

デコードされたデータをバッファに蓄積し、改行で分割して不完全な行をバッファに保持する実装は正しいです。


62-78: データの解析とエラーハンドリングは適切です

各行を 'data:' プレフィックスでチェックし、JSON 解析を行い、該当するイベントの場合にデータをエンキューしています。JSON 解析時のエラーも適切にログ出力されています。

@tegnike tegnike merged commit fa06a78 into develop Sep 27, 2024
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@coderabbitai coderabbitai bot mentioned this pull request Sep 27, 2024
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