mirror of https://github.com/linka-cloud/grpc.git
64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
// Copyright 2022 Linka Cloud All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package react
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import (
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"embed"
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"io/fs"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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"strings"
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)
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const (
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EndpointEnv = "REACT_ENDPOINT"
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)
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func NewHandler(dir embed.FS, subpath string) (http.Handler, error) {
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if e := os.Getenv(EndpointEnv); e != "" {
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return newProxy(e)
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}
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return newStatic(dir, subpath)
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}
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func newStatic(dir embed.FS, subpath string) (http.Handler, error) {
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s, err := fs.Sub(dir, subpath)
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if err != nil {
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return nil, err
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}
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fsrv := http.FileServer(http.FS(s))
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if _, err := fs.Stat(s, strings.TrimPrefix(r.URL.Path, "/")); err != nil {
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r.URL.Path = "/"
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}
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fsrv.ServeHTTP(w, r)
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}), nil
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}
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func newProxy(endpoint string) (http.Handler, error) {
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u, err := url.Parse(endpoint)
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if err != nil {
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return nil, err
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}
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p := httputil.NewSingleHostReverseProxy(u)
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return p, nil
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}
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func DevEnv() bool {
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return os.Getenv(EndpointEnv) != ""
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}
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