61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
package restApi;
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import (
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"google.golang.org/grpc"
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log "github.com/sirupsen/logrus"
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"context"
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"github.com/grpc-ecosystem/grpc-gateway/runtime"
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"net/http"
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"strings"
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gw "github.com/jamesread/OliveTin/gen/grpc"
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config "github.com/jamesread/OliveTin/pkg/config"
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)
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var (
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cfg *config.Config;
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)
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func Start(listenAddressRest string, listenAddressGrpc string, globalConfig *config.Config) (error) {
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cfg = globalConfig
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ctx := context.Background()
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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mux := runtime.NewServeMux()
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opts := []grpc.DialOption{grpc.WithInsecure()}
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err := gw.RegisterOliveTinApiHandlerFromEndpoint(ctx, mux, listenAddressGrpc, opts)
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if err != nil {
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log.Fatalf("gw error %v", err)
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}
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return http.ListenAndServe(listenAddressRest, allowCors(mux))
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}
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func allowCors(h http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if origin := r.Header.Get("Origin"); origin != "" {
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w.Header().Set("Access-Control-Allow-Origin", origin)
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if r.Method == "OPTIONS" && r.Header.Get("Access-Control-Request-Method") != "" {
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preflightHandler(w, r)
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return
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}
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}
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h.ServeHTTP(w, r)
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})
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}
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func preflightHandler(w http.ResponseWriter, r *http.Request) {
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headers := []string{"Content-Type", "Accept"}
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w.Header().Set("Access-Control-Allow-Headers", strings.Join(headers, ","))
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methods := []string{"GET", "HEAD", "POST", "PUT", "DELETE"}
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w.Header().Set("Access-Control-Allow-Methods", strings.Join(methods, ","))
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log.Infof("preflight request for %s", r.URL.Path)
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return
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}
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