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// Copyright 2023 Buf Technologies, Inc. | ||
// | ||
// 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 | ||
// | ||
// http://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. | ||
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// Package cors provides cross-origin resource sharing (CORS) constants for | ||
// Connect. These constants are used to configure the CORS headers for a | ||
// Connect server. | ||
package cors | ||
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import "net/http" | ||
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// AllowedMethods returns the allowed HTTP methods that scripts running in the | ||
// browser are permitted to use. | ||
// | ||
// To support cross-domain requests with the protocols supported by Connect, | ||
// these headers fields must be included in the preflight response header | ||
// Access-Control-Allow-Methods. | ||
func AllowedMethods() []string { | ||
return []string{ | ||
http.MethodGet, // Required for Connect GET requests | ||
http.MethodPost, // Required for all protocols | ||
} | ||
} | ||
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// AllowedHeaders returns the allowed header fields that scripts running in the | ||
// browser are permitted to access. | ||
// | ||
// To support cross-domain requests with the protocols supported by Connect, | ||
// these field names must be included in header Access-Control-Allow-Headers | ||
// of the actual response. | ||
func AllowedHeaders() []string { | ||
return []string{ | ||
"Content-Type", // Required for Connect | ||
"Connect-Protocol-Version", // Required for Connect | ||
"Connect-Timeout-Ms", // Optional for Connect | ||
"Connect-Accept-Encoding", // Future use for Connect | ||
"Connect-Content-Encoding", // Future use for Connect | ||
"Accept-Encoding", // Future use for Connect | ||
"Content-Encoding", // Future use for Connect | ||
"Grpc-Timeout", // Required for gRPC-web | ||
"X-Grpc-Web", // Optional for gRPC-web | ||
"X-User-Agent", // Optional for gRPC-web | ||
} | ||
} | ||
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// ExposedHeaders returns the headers that scripts running in the browser are | ||
// permitted to see. | ||
// | ||
// To support cross-domain requests with the protocols supported by Connect, | ||
// these field names must be included in header Access-Control-Expose-Headers | ||
// of the actual response. | ||
// | ||
// Make sure to include any application-specific headers your browser client | ||
// should see. If your application uses trailers, they will be sent as header | ||
// fields with a `Trailer-` prefix for Connect unary RPCs - make sure to | ||
// expose them as well if you want them to be visible in all supported | ||
// protocols. | ||
func ExposedHeaders() []string { | ||
return []string{ | ||
"Content-Encoding", // Future use for Connect | ||
"Connect-Content-Encoding", // Future use for Connect | ||
"Grpc-Status", // Required for gRPC-web header response | ||
"Grpc-Message", // Required for gRPC-web header response | ||
"Grpc-Status-Details-Bin", // Required for gRPC-web error details | ||
} | ||
} |