捕获错误

根据 GET 请求返回的 HTTP 状态代码实现自定义异常处理程序。工作流会捕获潜在异常并返回预定义的错误消息。

深入探索

如需查看包含此代码示例的详细文档，请参阅以下内容：

• 捕获错误
• 发出 HTTP 请求

代码示例

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"

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅 Google Cloud 示例浏览器。