mirror of https://github.com/perkeep/perkeep.git
80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
/*
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Copyright 2014 The Camlistore Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package thumbnail
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import (
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"log"
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"net/http"
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"strings"
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"time"
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"camlistore.org/pkg/blob"
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"camlistore.org/pkg/httputil"
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"camlistore.org/pkg/schema"
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)
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// serveRef gets the file at ref from fetcher and serves its contents.
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// It is used by Service as a one time handler to serve to the thumbnail child process on localhost.
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func serveRef(rw http.ResponseWriter, req *http.Request, ref blob.Ref, fetcher blob.Fetcher) {
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if !httputil.IsGet(req) {
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http.Error(rw, "Invalid download method.", 400)
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return
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}
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if !httputil.IsLocalhost(req) {
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http.Error(rw, "Forbidden.", 403)
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return
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}
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parts := strings.Split(req.URL.Path, "/")
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if len(parts) < 2 {
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http.Error(rw, "Malformed GET URL.", 400)
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return
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}
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blobRef, ok := blob.Parse(parts[1])
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if !ok {
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http.Error(rw, "Malformed GET URL.", 400)
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return
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}
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// only serves its ref
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if blobRef != ref {
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log.Printf("videothumbnail: access to %v forbidden; wrong blobref for handler", blobRef)
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http.Error(rw, "Forbidden.", 403)
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return
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}
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rw.Header().Set("Content-Type", "application/octet-stream")
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fr, err := schema.NewFileReader(fetcher, ref)
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if err != nil {
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httputil.ServeError(rw, req, err)
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return
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}
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defer fr.Close()
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http.ServeContent(rw, req, "", time.Now(), fr)
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}
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func createVideothumbnailHandler(ref blob.Ref, fetcher blob.Fetcher) http.Handler {
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return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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serveRef(rw, req, ref, fetcher)
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})
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}
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