forked from TrueCloudLab/restic
91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
// Copyright 2018, Google
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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 pyre
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import (
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"strconv"
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"strings"
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)
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const uploadFilePartPrefix = "/b2api/v1/b2_upload_part/"
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type LargeFileManager interface {
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PartWriter(id string, part int) (io.WriteCloser, error)
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}
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type largeFileServer struct {
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fm LargeFileManager
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}
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type uploadPartRequest struct {
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ID string `json:"fileId"`
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Part int `json:"partNumber"`
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Size int64 `json:"contentLength"`
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Hash string `json:"contentSha1"`
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}
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func parseUploadPartHeaders(r *http.Request) (uploadPartRequest, error) {
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var ur uploadPartRequest
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ur.Hash = r.Header.Get("X-Bz-Content-Sha1")
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part, err := strconv.ParseInt(r.Header.Get("X-Bz-Part-Number"), 10, 64)
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if err != nil {
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return ur, err
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}
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ur.Part = int(part)
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size, err := strconv.ParseInt(r.Header.Get("Content-Length"), 10, 64)
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if err != nil {
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return ur, err
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}
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ur.Size = size
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ur.ID = strings.TrimPrefix(r.URL.Path, uploadFilePartPrefix)
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return ur, nil
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}
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func (fs *largeFileServer) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
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req, err := parseUploadPartHeaders(r)
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if err != nil {
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http.Error(rw, err.Error(), 500)
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fmt.Println("oh no")
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return
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}
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w, err := fs.fm.PartWriter(req.ID, req.Part)
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if err != nil {
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http.Error(rw, err.Error(), 500)
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fmt.Println("oh no")
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return
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}
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if _, err := io.Copy(w, io.LimitReader(r.Body, req.Size)); err != nil {
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w.Close()
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http.Error(rw, err.Error(), 500)
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fmt.Println("oh no")
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return
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}
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if err := w.Close(); err != nil {
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http.Error(rw, err.Error(), 500)
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fmt.Println("oh no")
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return
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}
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if err := json.NewEncoder(rw).Encode(req); err != nil {
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fmt.Println("oh no")
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}
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}
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func RegisterLargeFileManagerOnMux(f LargeFileManager, mux *http.ServeMux) {
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mux.Handle(uploadFilePartPrefix, &largeFileServer{fm: f})
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}
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