/
file_server.go
59 lines (54 loc) · 1.8 KB
/
file_server.go
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// Copyright 2017 Google 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
//
// 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.
package https
import (
"fmt"
"net/http"
"net/url"
"strings"
)
// fileServer wraps a Communicator in order to serve files.
type fileServer struct {
*Communicator
}
// ServeHTTP implements http.Handler
func (s fileServer) ServeHTTP(res http.ResponseWriter, req *http.Request) {
path := strings.Split(strings.TrimPrefix(req.URL.EscapedPath(), "/"), "/")
if len(path) != 3 || path[0] != "files" {
http.Error(res, fmt.Sprintf("unable to parse files uri: %v", req.URL.EscapedPath()), http.StatusBadRequest)
return
}
service, err := url.PathUnescape(path[1])
if err != nil {
http.Error(res, fmt.Sprintf("unable to parse path component [%v]: %v", path[1], err), http.StatusBadRequest)
return
}
name, err := url.PathUnescape(path[2])
if err != nil {
http.Error(res, fmt.Sprintf("unable to parse path component [%v]: %v", path[2], err), http.StatusBadRequest)
return
}
ctx := req.Context()
data, modtime, err := s.fs.ReadFile(ctx, service, name)
if err != nil {
if s.fs.IsNotFound(err) {
http.Error(res, "file not found", http.StatusNotFound)
return
}
http.Error(res, fmt.Sprintf("internal error: %v", err), http.StatusInternalServerError)
return
}
http.ServeContent(res, req, name, modtime, data)
data.Close()
}