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Function.cs
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Function.cs
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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [START functions_http_cors]
using Google.Cloud.Functions.Framework;
using Microsoft.AspNetCore.Http;
using System.Net;
using System.Threading.Tasks;
namespace Cors;
// For more information about CORS and CORS preflight requests, see
// https://developer.mozilla.org/en-US/docs/Glossary/Preflight_request.
public class Function : IHttpFunction
{
public async Task HandleAsync(HttpContext context)
{
HttpRequest request = context.Request;
HttpResponse response = context.Response;
// Set CORS headers
// Allows GETs from any origin with the Content-Type
// header and caches preflight response for 3600s
response.Headers.Append("Access-Control-Allow-Origin", "*");
if (HttpMethods.IsOptions(request.Method))
{
response.Headers.Append("Access-Control-Allow-Methods", "GET");
response.Headers.Append("Access-Control-Allow-Headers", "Content-Type");
response.Headers.Append("Access-Control-Max-Age", "3600");
response.StatusCode = (int) HttpStatusCode.NoContent;
return;
}
await response.WriteAsync("CORS headers set successfully!", context.RequestAborted);
}
}
// [END functions_http_cors]