HTTP Hello World - Get

输出“Hello world!”以响应 GET 请求的函数。

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：

• 使用 Java 创建和部署 HTTP Cloud Run functions 函数（第 1 代）
• HTTP 教程
• JVM 语言
• 快速入门：使用 gcloud CLI 部署 Cloud Run 函数

代码示例

C#

如需向 Cloud Run functions 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为本地开发环境设置身份验证。

using Google.Cloud.Functions.Framework;
using Microsoft.AspNetCore.Http;
using System.Threading.Tasks;

namespace HelloWorld;

public class Function : IHttpFunction
{
    public async Task HandleAsync(HttpContext context)
    {
        await context.Response.WriteAsync("Hello World!", context.RequestAborted);
    }
}

Go

如需向 Cloud Run functions 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为本地开发环境设置身份验证。

// Package helloworld provides a set of Cloud Functions samples.
package helloworld

import (
	"fmt"
	"net/http"

	"github.com/GoogleCloudPlatform/functions-framework-go/functions"
)

func init() {
	functions.HTTP("HelloGet", helloGet)
}

// helloGet is an HTTP Cloud Function.
func helloGet(w http.ResponseWriter, r *http.Request) {
	fmt.Fprint(w, "Hello, World!")
}

Java

如需向 Cloud Run functions 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为本地开发环境设置身份验证。

package functions;

import com.google.cloud.functions.HttpFunction;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;
import java.io.BufferedWriter;
import java.io.IOException;

public class HelloWorld implements HttpFunction {
  // Simple function to return "Hello World"
  @Override
  public void service(HttpRequest request, HttpResponse response)
      throws IOException {
    BufferedWriter writer = response.getWriter();
    writer.write("Hello World!");
  }
}

Kotlin

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

class HelloWorld : HttpFunction {
    // Simple function to return "Hello World"
    @Throws(IOException::class)
    override fun service(request: HttpRequest, response: HttpResponse) {
        response.writer.write("Hello World!")
    }
}

Node.js

如需向 Cloud Run functions 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为本地开发环境设置身份验证。

const functions = require('@google-cloud/functions-framework');

// Register an HTTP function with the Functions Framework that will be executed
// when you make an HTTP request to the deployed function's endpoint.
functions.http('helloGET', (req, res) => {
  res.send('Hello World!');
});

PHP

如需向 Cloud Run functions 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为本地开发环境设置身份验证。

use Psr\Http\Message\ServerRequestInterface;

function helloGet(ServerRequestInterface $request): string
{
    return 'Hello, World!' . PHP_EOL;
}

Python

如需向 Cloud Run functions 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为本地开发环境设置身份验证。

import functions_framework

@functions_framework.http
def hello_get(request):
    """HTTP Cloud Function.
    Args:
        request (flask.Request): The request object.
        <https://flask.palletsprojects.com/en/1.1.x/api/#incoming-request-data>
    Returns:
        The response text, or any set of values that can be turned into a
        Response object using `make_response`
        <https://flask.palletsprojects.com/en/1.1.x/api/#flask.make_response>.
    Note:
        For more information on how Flask integrates with Cloud
        Functions, see the `Writing HTTP functions` page.
        <https://cloud.google.com/functions/docs/writing/http#http_frameworks>
    """
    return "Hello World!"

Ruby

如需向 Cloud Run functions 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为本地开发环境设置身份验证。

require "functions_framework"

FunctionsFramework.http "hello_get" do |_request|
  # The request parameter is a Rack::Request object.
  # See https://www.rubydoc.info/gems/rack/Rack/Request

  # Return the response body as a string.
  # You can also return a Rack::Response object, a Rack response array, or
  # a hash which will be JSON-encoded into a response.
  "Hello World!"
end

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。