擷取錯誤

根據 GET 要求傳回的 HTTP 狀態碼，實作自訂例外狀況處理常式。工作流程會擷取潛在例外狀況，並傳回預先定義的錯誤訊息。

深入探索

如需包含這個程式碼範例的詳細說明文件，請參閱下列內容：

• 捕捉錯誤
• 發出 HTTP 要求

程式碼範例

YAML

# Use a custom exception handler to catch exceptions and return predefined
# error messages; if the exception isn't recognized, the workflow
# execution fails and throws the exception returned by the GET request
- read_item:
    try:
      call: http.get
      args:
        url: https://example.com/someapi
        auth:
          type: OIDC
      result: API_response
    except:
      as: e
      steps:
        - known_errors:
            switch:
              - condition: ${not("HttpError" in e.tags)}
                next: connection_problem
              - condition: ${e.code == 404}
                next: url_not_found
              - condition: ${e.code == 403}
                next: auth_problem
        - unhandled_exception:
            raise: ${e}
- url_found:
    return: ${API_response.body}
- connection_problem:
    return: "Connection problem; check URL"
- url_not_found:
    return: "Sorry, URL wasn't found"
- auth_problem:
    return: "Authentication error"

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 範例瀏覽器。