forked from bufbuild/buf
/
bufstudioagent.go
67 lines (63 loc) · 1.94 KB
/
bufstudioagent.go
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// Copyright 2020-2023 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.
package bufstudioagent
import (
"crypto/tls"
"net/http"
"github.com/rs/cors"
"go.uber.org/zap"
)
// NewHandler creates a new handler that serves the invoke endpoints for the
// agent.
func NewHandler(
logger *zap.Logger,
origin string,
tlsClientConfig *tls.Config,
disallowedHeaders map[string]struct{},
forwardHeaders map[string]string,
privateNetwork bool,
) http.Handler {
corsHandlerOptions := cors.Options{
AllowedOrigins: []string{origin},
AllowedMethods: []string{http.MethodPost, http.MethodOptions},
AllowCredentials: true,
}
if privateNetwork {
corsHandlerOptions.AllowPrivateNetwork = true
}
corsHandler := cors.New(corsHandlerOptions)
plainHandler := corsHandler.Handler(newPlainPostHandler(logger, disallowedHeaders, forwardHeaders, tlsClientConfig))
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case http.MethodGet:
// In the future we could check for an upgrade header here.
_, _ = w.Write([]byte("OK"))
case http.MethodPost:
plainHandler.ServeHTTP(w, r)
return
case http.MethodOptions:
if privateNetwork {
corsHandler.HandlerFunc(w, r)
return
}
// If the private network flag is not used, fall through to the default
fallthrough
default:
http.Error(w, "", http.StatusMethodNotAllowed)
return
}
})
return mux
}