mirror of
https://github.com/vbatts/tar-split.git
synced 2024-12-19 11:56:30 +00:00
tar/asm: testing the disassembler
adding an archive to pass through and check that it is precisely the same archive on the handed through io.Reader.
This commit is contained in:
parent
686addad77
commit
feaa049730
5 changed files with 200 additions and 48 deletions
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@ -1,48 +1,197 @@
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package asm
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import (
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"bytes"
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"compress/gzip"
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"crypto/sha1"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"testing"
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"github.com/vbatts/tar-split/tar/storage"
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)
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var entries = storage.Entries{
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storage.Entry{
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Type: storage.SegmentType,
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Payload: []byte("how"),
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Position: 0,
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var entries = []struct {
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Entry storage.Entry
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Body []byte
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}{
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{
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Entry: storage.Entry{
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Type: storage.SegmentType,
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Payload: []byte("y'all"), // FIXME need real header here
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},
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},
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storage.Entry{
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Type: storage.SegmentType,
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Payload: []byte("y'all"),
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Position: 1,
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{
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Entry: storage.Entry{
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Type: storage.FileType,
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Name: "./hurr.txt",
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Payload: []byte{2, 116, 164, 177, 171, 236, 107, 78},
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Size: 20,
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},
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Body: []byte("imma hurr til I derp"),
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},
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storage.Entry{
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Type: storage.FileType,
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Name: "./hurr.txt",
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Payload: []byte("deadbeef"),
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Size: 8,
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Position: 2,
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{
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Entry: storage.Entry{
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Type: storage.SegmentType,
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Payload: []byte("doin"), // FIXME need real header here
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},
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},
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storage.Entry{
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Type: storage.SegmentType,
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Payload: []byte("doin"),
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Position: 3,
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{
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Entry: storage.Entry{
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Type: storage.FileType,
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Name: "./ermahgerd.txt",
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Payload: []byte{126, 72, 89, 239, 230, 252, 160, 187},
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Size: 26,
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},
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Body: []byte("café con leche, por favor"),
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},
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storage.Entry{
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Type: storage.FileType,
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Name: "./ermahgerd.txt",
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Payload: []byte("cafebabe"),
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Size: 8,
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Position: 4,
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{
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Entry: storage.Entry{
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Type: storage.SegmentType,
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Payload: []byte{00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00,
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00, 00},
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},
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},
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}
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func TestNewOutputTarStream(t *testing.T) {
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// TODO disassembly
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func TestTarStream(t *testing.T) {
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fgp := NewBufferFileGetPutter()
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// first lets prep a GetPutter and Packer
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for i := range entries {
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if entries[i].Entry.Type == storage.FileType {
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j, csum, err := fgp.Put(entries[i].Entry.Name, bytes.NewBuffer(entries[i].Body))
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if err != nil {
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t.Error(err)
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}
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if j != entries[i].Entry.Size {
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t.Errorf("size %q: expected %d; got %d",
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entries[i].Entry.Name,
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entries[i].Entry.Size,
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j)
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}
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if !bytes.Equal(csum, entries[i].Entry.Payload) {
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t.Errorf("checksum %q: expected %v; got %v",
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entries[i].Entry.Name,
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entries[i].Entry.Payload,
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csum)
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}
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}
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}
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// next we'll use these to produce a tar stream.
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_ = NewOutputTarStream(fgp, nil)
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// TODO finish this
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}
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func TestNewInputTarStream(t *testing.T) {
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func TestInputTarStream(t *testing.T) {
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var (
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expectedSum = "1eb237ff69bca6e22789ecb05b45d35ca307adbd"
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expectedSize int64 = 10240
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)
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fh, err := os.Open("./testdata/t.tar.gz")
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if err != nil {
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t.Fatal(err)
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}
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defer fh.Close()
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gzRdr, err := gzip.NewReader(fh)
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if err != nil {
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t.Fatal(err)
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}
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defer gzRdr.Close()
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// Setup where we'll store the metadata
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w := bytes.NewBuffer([]byte{})
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sp := storage.NewJsonPacker(w)
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fgp := NewBufferFileGetPutter()
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// check the tar on the front end too
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h0 := sha1.New()
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tRdr0 := io.TeeReader(gzRdr, h0)
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// wrap the disassembly stream
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tarStream, err := NewInputTarStream(tRdr0, sp, fgp)
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if err != nil {
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t.Fatal(err)
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}
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// get a sum of the stream after it has passed through to ensure it's the same.
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h1 := sha1.New()
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tRdr1 := io.TeeReader(tarStream, h1)
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// read it all to the bit bucket
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i, err := io.Copy(ioutil.Discard, tRdr1)
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if err != nil {
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t.Fatal(err)
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}
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if i != expectedSize {
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t.Errorf("size of tar: expected %d; got %d", expectedSize, i)
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}
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if fmt.Sprintf("%x", h1.Sum(nil)) != expectedSum {
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t.Logf("h0 was %x", h0.Sum(nil))
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t.Errorf("checksum of tar: expected %q; got %x", expectedSum, h1.Sum(nil))
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}
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}
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@ -36,6 +36,7 @@ func NewInputTarStream(r io.Reader, p storage.Packer, fp FilePutter) (io.Reader,
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pR, pW := io.Pipe()
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outputRdr := io.TeeReader(r, pW)
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// we need a putter that will generate the crc64 sums of file payloads
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if fp == nil {
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fp = NewDiscardFilePutter()
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}
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@ -58,10 +59,8 @@ func NewInputTarStream(r io.Reader, p storage.Packer, fp FilePutter) (io.Reader,
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})
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if err != nil {
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pW.CloseWithError(err)
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} else {
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pW.Close()
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}
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return
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break // not return. We need the end of the reader.
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}
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if _, err := p.AddEntry(storage.Entry{
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@ -77,7 +76,7 @@ func NewInputTarStream(r io.Reader, p storage.Packer, fp FilePutter) (io.Reader,
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fileRdr, fileWrtr := io.Pipe()
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go func() {
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var err error
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csum, err = fp.Put(hdr.Name, fileRdr)
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_, csum, err = fp.Put(hdr.Name, fileRdr)
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if err != nil {
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pW.CloseWithError(err)
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}
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@ -86,27 +85,30 @@ func NewInputTarStream(r io.Reader, p storage.Packer, fp FilePutter) (io.Reader,
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pW.CloseWithError(err)
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return
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}
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fileWrtr.Close()
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}
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// File entries added, regardless of size
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if _, err := p.AddEntry(storage.Entry{
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_, err = p.AddEntry(storage.Entry{
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Type: storage.FileType,
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Name: hdr.Name,
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Size: hdr.Size,
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Payload: csum,
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}); err != nil {
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})
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if err != nil {
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pW.CloseWithError(err)
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}
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if _, err := p.AddEntry(storage.Entry{
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_, err = p.AddEntry(storage.Entry{
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Type: storage.SegmentType,
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Payload: tr.RawBytes(),
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}); err != nil {
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})
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if err != nil {
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pW.CloseWithError(err)
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}
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}
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// it is allowable, and not uncommon that there is further padding on the
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// end of an archive, apart from the expected 1024 null bytes
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// end of an archive, apart from the expected 1024 null bytes.
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remainder, err := ioutil.ReadAll(outputRdr)
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if err != nil && err != io.EOF {
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pW.CloseWithError(err)
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@ -16,8 +16,8 @@ type FileGetter interface {
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}
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type FilePutter interface {
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// Put returns a stream for the provided file path
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Put(string, io.Reader) ([]byte, error)
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// Put returns the crc64 checksum for the provided file
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Put(string, io.Reader) (int64, []byte, error)
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}
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type FileGetPutter interface {
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@ -51,15 +51,16 @@ func (bfgp bufferFileGetPutter) Get(name string) (io.ReadCloser, error) {
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return &readCloserWrapper{b}, nil
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}
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func (bfgp *bufferFileGetPutter) Put(name string, r io.Reader) ([]byte, error) {
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func (bfgp *bufferFileGetPutter) Put(name string, r io.Reader) (int64, []byte, error) {
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c := crc64.New(crcTable)
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tRdr := io.TeeReader(r, c)
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b := bytes.NewBuffer([]byte{})
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if _, err := io.Copy(b, tRdr); err != nil {
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return nil, err
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i, err := io.Copy(b, tRdr)
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if err != nil {
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return 0, nil, err
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}
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bfgp.files[name] = b.Bytes()
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return c.Sum(nil), nil
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return i, c.Sum(nil), nil
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}
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type readCloserWrapper struct {
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@ -86,11 +87,11 @@ func NewDiscardFilePutter() FilePutter {
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type bitBucketFilePutter struct {
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}
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func (bbfp *bitBucketFilePutter) Put(name string, r io.Reader) ([]byte, error) {
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func (bbfp *bitBucketFilePutter) Put(name string, r io.Reader) (int64, []byte, error) {
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c := crc64.New(crcTable)
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tRdr := io.TeeReader(r, c)
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_, err := io.Copy(ioutil.Discard, tRdr)
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return c.Sum(nil), err
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i, err := io.Copy(ioutil.Discard, tRdr)
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return i, c.Sum(nil), err
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}
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var crcTable = crc64.MakeTable(crc64.ISO)
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@ -14,7 +14,7 @@ func TestGetter(t *testing.T) {
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}
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for n, b := range files {
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for body, sum := range b {
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csum, err := fgp.Put(n, bytes.NewBufferString(body))
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_, csum, err := fgp.Put(n, bytes.NewBufferString(body))
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if err != nil {
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t.Error(err)
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}
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@ -50,7 +50,7 @@ func TestPutter(t *testing.T) {
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}
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for n, b := range files {
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for body, sum := range b {
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csum, err := fp.Put(n, bytes.NewBufferString(body))
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_, csum, err := fp.Put(n, bytes.NewBufferString(body))
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if err != nil {
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t.Error(err)
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}
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BIN
tar/asm/testdata/t.tar.gz
vendored
Normal file
BIN
tar/asm/testdata/t.tar.gz
vendored
Normal file
Binary file not shown.
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