92 lines
2.0 KiB
Go
92 lines
2.0 KiB
Go
// Copyright (C) 2018 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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"crypto/sha256"
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"flag"
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"fmt"
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"net/http"
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"os"
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"time"
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"github.com/vivint/infectious"
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"storj.io/storj/pkg/eestream"
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"storj.io/storj/pkg/ranger"
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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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pieceBlockSize = flag.Int("piece_block_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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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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type indexRangerError struct {
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i int
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rr ranger.Ranger
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err error
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}
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func Main() error {
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encKey := 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, *pieceBlockSize)
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var firstNonce [24]byte
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decrypter, err := eestream.NewSecretboxDecrypter(
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&encKey, &firstNonce, es.DecodedBlockSize())
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if err != nil {
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return err
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}
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// initialize http rangers in parallel to save from network latency
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rrs := map[int]ranger.Ranger{}
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result := make(chan indexRangerError, *rsn)
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for i := 0; i < *rsn; i++ {
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go func(i int) {
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url := fmt.Sprintf("http://localhost:%d", 10000+i)
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rr, err := ranger.HTTPRanger(url)
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result <- indexRangerError{i, rr, err}
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}(i)
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}
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// wait for all goroutines to finish and save result in rrs map
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for i := 0; i < *rsn; i++ {
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res := <-result
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if res.err != nil {
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// return on the first failure
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return err
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}
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rrs[res.i] = res.rr
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}
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rr, err := eestream.Decode(rrs, es)
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if err != nil {
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return err
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}
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rr, err = eestream.Transform(rr, decrypter)
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if err != nil {
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return err
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}
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rr, err = eestream.UnpadSlow(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(w, r, flag.Arg(0), time.Time{}, rr)
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}))
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}
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