Hello World 错误

演示如何报告错误。

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：

代码示例

Go


package tips

import (
	"fmt"
	"net/http"
	"os"
)

// HTTPError describes how errors are handled in an HTTP function.
func HTTPError(w http.ResponseWriter, r *http.Request) {
	// An error response code is NOT reported to Error Reporting.
	// http.Error(w, "An error occurred", http.StatusInternalServerError)

	// Printing to stdout and stderr is NOT reported to Error Reporting.
	fmt.Println("An error occurred (stdout)")
	fmt.Fprintln(os.Stderr, "An error occurred (stderr)")

	// Calling log.Fatal sets a non-zero exit code and is NOT reported to Error
	// Reporting.
	// log.Fatal("An error occurred (log.Fatal)")

	// Panics are reported to Error Reporting.
	panic("An error occurred (panic)")
}

Java

在 GitHub 上查看反馈


import com.google.cloud.functions.HttpFunction;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;
import java.io.IOException;
import java.util.logging.Logger;

public class HelloError implements HttpFunction {

  private static final Logger logger = Logger.getLogger(HelloError.class.getName());

  @Override
  public void service(HttpRequest request, HttpResponse response)
      throws IOException {
    // These will NOT be reported to Error Reporting
    System.err.println("I failed you");
    logger.severe("I failed you");

    // This WILL be reported to Error Reporting
    throw new RuntimeException("I failed you");
  }
}

Node.js

在 GitHub 上查看反馈

// These WILL be reported to Error Reporting
throw new Error('I failed you'); // Will cause a cold start if not caught

// These WILL be reported to Error Reporting
console.error(new Error('I failed you')); // Logging an Error object
console.error('I failed you'); // Logging something other than an Error object
throw 1; // Throwing something other than an Error object
callback('I failed you');
res.status(500).send('I failed you');

Python

在 GitHub 上查看反馈

@functions_framework.http
def hello_error_1(request):
    # This WILL be reported to Error Reporting,
    # and WILL NOT show up in logs or
    # terminate the function.
    from google.cloud import error_reporting
    client = error_reporting.Client()

    try:
        raise RuntimeError('I failed you')
    except RuntimeError:
        client.report_exception()

    # This WILL be reported to Error Reporting,
    # and WILL terminate the function
    raise RuntimeError('I failed you')
@functions_framework.http
def hello_error_2(request):
    # These errors WILL NOT be reported to Error
    # Reporting, but will show up in logs.
    import logging
    import sys
    print(RuntimeError('I failed you (print to stdout)'))
    logging.warn(RuntimeError('I failed you (logging.warn)'))
    logging.error(RuntimeError('I failed you (logging.error)'))
    sys.stderr.write('I failed you (sys.stderr.write)\n')

    # This is considered a successful execution and WILL NOT be reported
    # to Error Reporting, but the status code (500) WILL be logged.
    from flask import abort
    return abort(500)

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。