97 lines
2.2 KiB
Go
97 lines
2.2 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package main
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import (
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"context"
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"crypto/sha256"
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"flag"
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"fmt"
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"io/ioutil"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"github.com/vivint/infectious"
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"go.uber.org/zap"
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"storj.io/common/encryption"
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"storj.io/common/ranger"
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"storj.io/common/storj"
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"storj.io/storj/uplink/eestream"
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)
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var (
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addr = flag.String("addr", "localhost:8080", "address to serve from")
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erasureShareSize = flag.Int("erasure_share_size", 4*1024, "block size of pieces")
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key = flag.String("key", "a key", "the secret key")
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rsk = flag.Int("required", 20, "rs required")
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rsn = flag.Int("total", 40, "rs total")
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)
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func main() {
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flag.Parse()
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if flag.Arg(0) == "" {
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fmt.Printf("usage: %s <targetdir>\n", os.Args[0])
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os.Exit(1)
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}
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err := Main()
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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os.Exit(1)
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}
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}
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// Main is the exported CLI executable function
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func Main() error {
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encKey := storj.Key(sha256.Sum256([]byte(*key)))
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fc, err := infectious.NewFEC(*rsk, *rsn)
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if err != nil {
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return err
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}
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es := eestream.NewRSScheme(fc, *erasureShareSize)
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var firstNonce storj.Nonce
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decrypter, err := encryption.NewDecrypter(storj.EncAESGCM, &encKey, &firstNonce, es.StripeSize())
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if err != nil {
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return err
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}
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pieces, err := ioutil.ReadDir(flag.Arg(0))
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if err != nil {
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return err
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}
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rrs := map[int]ranger.Ranger{}
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for _, piece := range pieces {
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piecenum, err := strconv.Atoi(strings.TrimSuffix(piece.Name(), ".piece"))
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if err != nil {
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return err
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}
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r, err := ranger.FileRanger(filepath.Join(flag.Arg(0), piece.Name()))
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if err != nil {
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return err
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}
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rrs[piecenum] = r
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}
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rc, err := eestream.Decode(zap.L(), rrs, es, 4*1024*1024, false)
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if err != nil {
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return err
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}
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rr, err := encryption.Transform(rc, decrypter)
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if err != nil {
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return err
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}
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ctx := context.Background()
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rr, err = encryption.UnpadSlow(ctx, rr)
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if err != nil {
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return err
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}
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return http.ListenAndServe(*addr, http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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ranger.ServeContent(ctx, w, r, flag.Arg(0), time.Time{}, rr)
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}))
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}
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