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Use ltx.Checksum type (#400)
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@benbjohnson
benbjohnson authored Sep 6, 2023
1 parent b216362 commit 4eaa0cb
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Showing 6 changed files with 64 additions and 60 deletions.
88 changes: 44 additions & 44 deletions db.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -47,19 +47,19 @@ type DB struct {

chksums struct { // database page checksums
mu sync.Mutex
pages []uint64 // individual database page checksums
blocks []uint64 // aggregated database page checksums; grouped by ChecksumBlockSize
pages []ltx.Checksum // individual database page checksums
blocks []ltx.Checksum // aggregated database page checksums; grouped by ChecksumBlockSize
}

dirtyPageSet map[uint32]struct{}

wal struct {
offset int64 // offset of the start of the transaction
byteOrder binary.ByteOrder // determine by WAL header magic
salt1, salt2 uint32 // current WAL header salt values
chksum1, chksum2 uint32 // WAL checksum values at wal.offset
frameOffsets map[uint32]int64 // WAL frame offset of the last version of a given pgno before current tx
chksums map[uint32][]uint64 // wal page checksums
offset int64 // offset of the start of the transaction
byteOrder binary.ByteOrder // determine by WAL header magic
salt1, salt2 uint32 // current WAL header salt values
chksum1, chksum2 uint32 // WAL checksum values at wal.offset
frameOffsets map[uint32]int64 // WAL frame offset of the last version of a given pgno before current tx
chksums map[uint32][]ltx.Checksum // wal page checksums
}
shmMu sync.Mutex // prevents updateSHM() from being called concurrently
updatingSHM atomic.Bool // marks when updateSHM is being called so SHM writes are prevented
Expand Down Expand Up @@ -106,7 +106,7 @@ func NewDB(store *Store, name string, path string) *DB {
db.haltLockAndGuard.Store((*haltLockAndGuard)(nil))
db.remoteHaltLock.Store((*HaltLock)(nil))
db.wal.frameOffsets = make(map[uint32]int64)
db.wal.chksums = make(map[uint32][]uint64)
db.wal.chksums = make(map[uint32][]ltx.Checksum)
db.guardSets.m = make(map[uint64]*GuardSet)

return db
Expand Down Expand Up @@ -444,7 +444,7 @@ func (db *DB) WaitPosExact(ctx context.Context, target ltx.Pos) error {
return fmt.Errorf("target transaction id exceeded: %s > %s", pos.TXID.String(), target.TXID.String())
}
if pos.PostApplyChecksum != target.PostApplyChecksum {
return fmt.Errorf("target checksum mismatch: %016x != %016x", pos.PostApplyChecksum, target.PostApplyChecksum)
return fmt.Errorf("target checksum mismatch: %s != %s", pos.PostApplyChecksum, target.PostApplyChecksum)
}
return nil
}
Expand Down Expand Up @@ -743,7 +743,7 @@ func (db *DB) CheckpointNoLock(ctx context.Context) (err error) {
}

// Clear per-page checksums within WAL.
db.wal.chksums = make(map[uint32][]uint64)
db.wal.chksums = make(map[uint32][]ltx.Checksum)

// Update the SHM file.
if err := db.updateSHM(ctx); err != nil {
Expand Down Expand Up @@ -923,8 +923,8 @@ func (db *DB) initDatabaseFile() error {
// short compared to the page count in the header so just checksum what we
// can. The database may recover in applyLTX() so we'll do validation then.
buf := make([]byte, db.pageSize)
db.chksums.pages = make([]uint64, db.PageN())
db.chksums.blocks = make([]uint64, pageChksumBlock(db.PageN()))
db.chksums.pages = make([]ltx.Checksum, db.PageN())
db.chksums.blocks = make([]ltx.Checksum, pageChksumBlock(db.PageN()))
for pgno := uint32(1); pgno <= db.PageN(); pgno++ {
offset := int64(pgno-1) * int64(db.pageSize)
if _, err := internal.ReadFullAt(f, buf, offset); err == io.EOF || err == io.ErrUnexpectedEOF {
Expand Down Expand Up @@ -1042,7 +1042,7 @@ func (db *DB) ReadDatabaseAt(ctx context.Context, f *os.File, data []byte, offse
var pgno uint32
if db.pageSize != 0 && offset%int64(db.pageSize) == 0 && len(data) == int(db.pageSize) {
pgno = uint32(offset/int64(db.pageSize)) + 1
chksum = fmt.Sprintf("%016x", ltx.ChecksumPage(pgno, data))
chksum = ltx.ChecksumPage(pgno, data).String()
}
TraceLog.Printf("[ReadDatabaseAt(%s)]: offset=%d size=%d pgno=%d chksum=%s owner=%d %s", db.name, offset, len(data), pgno, chksum, owner, errorKeyValue(err))

Expand Down Expand Up @@ -1096,9 +1096,9 @@ func (db *DB) WriteDatabaseAt(ctx context.Context, f *os.File, data []byte, offs

// writeDatabasePage writes a page to the database file.
func (db *DB) writeDatabasePage(f *os.File, pgno uint32, data []byte, invalidate bool) (err error) {
var prevChksum, newChksum uint64
var prevChksum, newChksum ltx.Checksum
defer func() {
TraceLog.Printf("[WriteDatabasePage(%s)]: pgno=%d chksum=%016x prev=%016x %s", db.name, pgno, newChksum, prevChksum, errorKeyValue(err))
TraceLog.Printf("[WriteDatabasePage(%s)]: pgno=%d chksum=%s prev=%s %s", db.name, pgno, newChksum, prevChksum, errorKeyValue(err))
}()

assert(db.pageSize != 0, "page size required")
Expand Down Expand Up @@ -1278,7 +1278,7 @@ func (db *DB) TruncateWAL(ctx context.Context, size int64) (err error) {

// Clear all per-page checksums for the WAL.
db.wal.frameOffsets = make(map[uint32]int64)
db.wal.chksums = make(map[uint32][]uint64)
db.wal.chksums = make(map[uint32][]ltx.Checksum)

return nil
}
Expand All @@ -1293,7 +1293,7 @@ func (db *DB) RemoveWAL(ctx context.Context) (err error) {

// Clear all per-page checksums for the WAL.
db.wal.frameOffsets = make(map[uint32]int64)
db.wal.chksums = make(map[uint32][]uint64)
db.wal.chksums = make(map[uint32][]ltx.Checksum)

return nil
}
Expand Down Expand Up @@ -1388,7 +1388,7 @@ func (db *DB) writeWALHeader(ctx context.Context, f *os.File, data []byte, offse
db.wal.chksum1 = binary.BigEndian.Uint32(data[24:])
db.wal.chksum2 = binary.BigEndian.Uint32(data[28:])
db.wal.frameOffsets = make(map[uint32]int64)
db.wal.chksums = make(map[uint32][]uint64)
db.wal.chksums = make(map[uint32][]ltx.Checksum)

// Passthrough write to underlying WAL file.
_, err = f.WriteAt(data, offset)
Expand Down Expand Up @@ -1601,7 +1601,7 @@ func (db *DB) CommitWAL(ctx context.Context) (err error) {
sort.Slice(pgnos, func(i, j int) bool { return pgnos[i] < pgnos[j] })

frame := make([]byte, walFrameSize)
newWALChksums := make(map[uint32]uint64)
newWALChksums := make(map[uint32]ltx.Checksum)
lockPgno := ltx.LockPgno(db.pageSize)
for _, pgno := range pgnos {
if pgno == lockPgno {
Expand All @@ -1628,7 +1628,7 @@ func (db *DB) CommitWAL(ctx context.Context) (err error) {
pageChksum := ltx.ChecksumPage(pgno, frame[WALFrameHeaderSize:])
newWALChksums[pgno] = pageChksum

TraceLog.Printf("[CommitWALPage(%s)]: pgno=%d chksum=%016x prev=%016x\n", db.name, pgno, pageChksum, prevPageChksum)
TraceLog.Printf("[CommitWALPage(%s)]: pgno=%d chksum=%s prev=%s\n", db.name, pgno, pageChksum, prevPageChksum)
}

// Remove checksum of truncated pages.
Expand All @@ -1649,11 +1649,11 @@ func (db *DB) CommitWAL(ctx context.Context) (err error) {
db.chksums.mu.Unlock()
pageChksum := ltx.ChecksumPage(pgno, page)
if pageChksum != prevPageChksum {
return fmt.Errorf("truncated page %d checksum mismatch: %016x <> %016x", pgno, pageChksum, prevPageChksum)
return fmt.Errorf("truncated page %d checksum mismatch: %s <> %s", pgno, pageChksum, prevPageChksum)
}
newWALChksums[pgno] = 0

TraceLog.Printf("[CommitWALRemovePage(%s)]: pgno=%d prev=%016x\n", db.name, pgno, prevPageChksum)
TraceLog.Printf("[CommitWALRemovePage(%s)]: pgno=%d prev=%s\n", db.name, pgno, prevPageChksum)
}

// Calculate checksum after commit.
Expand Down Expand Up @@ -1740,7 +1740,7 @@ func (db *DB) CommitWAL(ctx context.Context) (err error) {
if chksum, err := db.onDiskChecksum(dbFile, walFile); err != nil {
return fmt.Errorf("checksum (wal): %w", err)
} else if chksum != postApplyChecksum {
return fmt.Errorf("verification failed (wal): %016x <> %016x", chksum, postApplyChecksum)
return fmt.Errorf("verification failed (wal): %s <> %s", chksum, postApplyChecksum)
}
}

Expand Down Expand Up @@ -1975,7 +1975,7 @@ func (db *DB) CommitJournal(ctx context.Context, mode JournalMode) (err error) {
}

// Remove WAL checksums. These shouldn't exist but remove them just in case.
db.wal.chksums = make(map[uint32][]uint64)
db.wal.chksums = make(map[uint32][]ltx.Checksum)

// Copy transactions from main database to the LTX file in sorted order.
buf := make([]byte, db.pageSize)
Expand Down Expand Up @@ -2012,10 +2012,10 @@ func (db *DB) CommitJournal(ctx context.Context, mode JournalMode) (err error) {
}
bufChksum := ltx.ChecksumPage(pgno, buf)
if bufChksum != pageChksum {
return fmt.Errorf("updated page (%d) does not match in-memory checksum: %016x <> %016x (⊕%016x)", pgno, bufChksum, pageChksum, bufChksum^pageChksum)
return fmt.Errorf("updated page (%d) does not match in-memory checksum: %s <> %s (⊕%s)", pgno, bufChksum, pageChksum, bufChksum^pageChksum)
}

TraceLog.Printf("[CommitJournalPage(%s)]: pgno=%d chksum=%016x %s", db.name, pgno, pageChksum, errorKeyValue(err))
TraceLog.Printf("[CommitJournalPage(%s)]: pgno=%d chksum=%s %s", db.name, pgno, pageChksum, errorKeyValue(err))
}

// Remove all checksums after last page.
Expand All @@ -2034,7 +2034,7 @@ func (db *DB) CommitJournal(ctx context.Context, mode JournalMode) (err error) {

pageChksum, _ := db.pageChecksum(pgno, db.PageN(), nil)
db.setDatabasePageChecksum(pgno, 0)
TraceLog.Printf("[CommitJournalRemovePage(%s)]: pgno=%d chksum=%016x %s", db.name, pgno, pageChksum, errorKeyValue(err))
TraceLog.Printf("[CommitJournalRemovePage(%s)]: pgno=%d chksum=%s %s", db.name, pgno, pageChksum, errorKeyValue(err))
}
}()

Expand Down Expand Up @@ -2114,7 +2114,7 @@ func (db *DB) CommitJournal(ctx context.Context, mode JournalMode) (err error) {
if chksum, err := db.onDiskChecksum(dbFile, nil); err != nil {
return fmt.Errorf("checksum (journal): %w", err)
} else if chksum != postApplyChecksum {
return fmt.Errorf("verification failed (journal): %016x <> %016x", chksum, postApplyChecksum)
return fmt.Errorf("verification failed (journal): %s <> %s", chksum, postApplyChecksum)
}
}

Expand Down Expand Up @@ -2220,7 +2220,7 @@ func (db *DB) Drop(ctx context.Context) (err error) {
db.wal.chksum1 = 0
db.wal.chksum2 = 0
db.wal.frameOffsets = make(map[uint32]int64)
db.wal.chksums = make(map[uint32][]uint64)
db.wal.chksums = make(map[uint32][]ltx.Checksum)

// Update transaction for database.
pos = ltx.NewPos(enc.Header().MaxTXID, enc.Trailer().PostApplyChecksum)
Expand All @@ -2241,7 +2241,7 @@ func (db *DB) Drop(ctx context.Context) (err error) {
}

// onDiskChecksum calculates the LTX checksum directly from the on-disk database & WAL.
func (db *DB) onDiskChecksum(dbFile, walFile *os.File) (chksum uint64, err error) {
func (db *DB) onDiskChecksum(dbFile, walFile *os.File) (chksum ltx.Checksum, err error) {
if db.pageSize == 0 {
return 0, fmt.Errorf("page size required for checksum")
} else if db.PageN() == 0 {
Expand Down Expand Up @@ -2356,7 +2356,7 @@ func (db *DB) WriteLTXFileAt(ctx context.Context, r io.Reader) (string, error) {
return "", fmt.Errorf("non-sequential header minimum txid %s, expecting %s", got.String(), want.String())
}
if got, want := hdr.PreApplyChecksum, prevPos.PostApplyChecksum; got != want {
return "", fmt.Errorf("pre-apply checksum mismatch: %016x, expecting %016x", got, want)
return "", fmt.Errorf("pre-apply checksum mismatch: %s, expecting %s", got, want)
}
}

Expand Down Expand Up @@ -2420,7 +2420,7 @@ func (db *DB) ApplyLTXNoLock(ctx context.Context, path string) error {
var trailer ltx.Trailer
prevDBMode := db.Mode()
defer func() {
TraceLog.Printf("[ApplyLTX(%s)]: txid=%s-%s chksum=%016x-%16x commit=%d pageSize=%d timestamp=%s mode=(%s→%s) path=%s",
TraceLog.Printf("[ApplyLTX(%s)]: txid=%s-%s chksum=%s-%s commit=%d pageSize=%d timestamp=%s mode=(%s→%s) path=%s",
db.name, hdr.MinTXID.String(), hdr.MaxTXID.String(), hdr.PreApplyChecksum, trailer.PostApplyChecksum, hdr.Commit, db.pageSize,
time.UnixMilli(hdr.Timestamp).UTC().Format(time.RFC3339), prevDBMode, db.Mode(), filepath.Base(path))
}()
Expand Down Expand Up @@ -2516,7 +2516,7 @@ func (db *DB) ApplyLTXNoLock(ctx context.Context, path string) error {
if chksum, err := db.checksum(dec.Header().Commit, nil); err != nil {
return fmt.Errorf("compute checksum: %w", err)
} else if chksum != dec.Trailer().PostApplyChecksum {
return fmt.Errorf("database checksum %016x on TXID %s does not match LTX post-apply checksum %016x",
return fmt.Errorf("database checksum %s on TXID %s does not match LTX post-apply checksum %s",
chksum, dec.Header().MaxTXID.String(), dec.Trailer().PostApplyChecksum)
}

Expand Down Expand Up @@ -3129,7 +3129,7 @@ func (db *DB) InWriteTx() bool {

// blockChksum returns the aggregate checksum for a block of pages.
// Must hold db.chksums.mu lock.
func (db *DB) blockChksum(block uint32) uint64 {
func (db *DB) blockChksum(block uint32) ltx.Checksum {
if block >= uint32(len(db.chksums.blocks)) || db.chksums.blocks[block] == 0 {
db.recomputeBlockChksum(block)
}
Expand All @@ -3141,11 +3141,11 @@ func (db *DB) blockChksum(block uint32) uint64 {
func (db *DB) recomputeBlockChksum(block uint32) {
// Ensure there is enough space in the blocks list.
if n := int(block) + 1; n > len(db.chksums.blocks) {
db.chksums.blocks = append(db.chksums.blocks, make([]uint64, n-len(db.chksums.blocks))...)
db.chksums.blocks = append(db.chksums.blocks, make([]ltx.Checksum, n-len(db.chksums.blocks))...)
}

// Aggregate all page checksums within the block.
var chksum uint64
var chksum ltx.Checksum
for i := uint32(0); i < ChecksumBlockSize; i++ {
pgno := (block * ChecksumBlockSize) + i + 1
pageChksum := db.databasePageChecksum(pgno)
Expand All @@ -3156,7 +3156,7 @@ func (db *DB) recomputeBlockChksum(block uint32) {
}

// checksum returns the checksum of the database based on per-page checksums.
func (db *DB) checksum(pageN uint32, newWALChecksums map[uint32]uint64) (uint64, error) {
func (db *DB) checksum(pageN uint32, newWALChecksums map[uint32]ltx.Checksum) (ltx.Checksum, error) {
if pageN == 0 {
return ltx.ChecksumFlag, nil
}
Expand All @@ -3174,7 +3174,7 @@ func (db *DB) checksum(pageN uint32, newWALChecksums map[uint32]uint64) (uint64,
ignoredBlocks[pageChksumBlock(pgno)] = true
}

var chksum uint64
var chksum ltx.Checksum
for block := uint32(0); block < blockN; block++ {
// Use cached block checksum if it is computed and it does not have a
// page in the WAL.
Expand Down Expand Up @@ -3212,7 +3212,7 @@ func (db *DB) checksum(pageN uint32, newWALChecksums map[uint32]uint64) (uint64,
// The lock page will always return a checksum of zero and a true.
//
// Database WRITE lock and db.chksums.mu should be held when invoked.
func (db *DB) pageChecksum(pgno, pageN uint32, newWALChecksums map[uint32]uint64) (chksum uint64, ok bool) {
func (db *DB) pageChecksum(pgno, pageN uint32, newWALChecksums map[uint32]ltx.Checksum) (chksum ltx.Checksum, ok bool) {
// The lock page should never have a checksum.
if pgno == ltx.LockPgno(db.pageSize) {
return 0, true
Expand Down Expand Up @@ -3244,7 +3244,7 @@ func (db *DB) pageChecksum(pgno, pageN uint32, newWALChecksums map[uint32]uint64

// databasePageChecksum returns the checksum for a page in the database file.
// Returns zero if unset. Must hold db.chksums.mu.
func (db *DB) databasePageChecksum(pgno uint32) uint64 {
func (db *DB) databasePageChecksum(pgno uint32) ltx.Checksum {
assert(pgno > 0, "database pgno must be larger than zero")

if i := pgno - 1; i < uint32(len(db.chksums.pages)) {
Expand All @@ -3255,7 +3255,7 @@ func (db *DB) databasePageChecksum(pgno uint32) uint64 {

// setDatabasePageChecksum sets the checksum for a page in the database file.
// Must hold db.chksums.mu.
func (db *DB) setDatabasePageChecksum(pgno uint32, chksum uint64) {
func (db *DB) setDatabasePageChecksum(pgno uint32, chksum ltx.Checksum) {
assert(pgno > 0, "database pgno must be larger than zero")

// Always overwrite the lock page as a zero checksum.
Expand All @@ -3265,7 +3265,7 @@ func (db *DB) setDatabasePageChecksum(pgno uint32, chksum uint64) {

// Ensure we have at least enough space to set the checksum.
if n := int(pgno); n > len(db.chksums.pages) {
db.chksums.pages = append(db.chksums.pages, make([]uint64, n-len(db.chksums.pages))...)
db.chksums.pages = append(db.chksums.pages, make([]ltx.Checksum, n-len(db.chksums.pages))...)
}

db.chksums.pages[pgno-1] = chksum
Expand Down Expand Up @@ -3382,7 +3382,7 @@ func (db *DB) WriteSnapshotTo(ctx context.Context, dst io.Writer) (header ltx.He
// Write page frames.
pageData := make([]byte, pageSize)
lockPgno := ltx.LockPgno(pageSize)
var chksum uint64
var chksum ltx.Checksum
for pgno := uint32(1); pgno <= pageN; pgno++ {
select {
case <-ctx.Done():
Expand Down
24 changes: 13 additions & 11 deletions fuse/pos_node.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -14,15 +14,17 @@ import (
// PosFileSize is the size, in bytes, of the "-pos" file.
const PosFileSize = 34

var _ fs.Node = (*PosNode)(nil)
var _ fs.NodeOpener = (*PosNode)(nil)
var _ fs.NodeForgetter = (*PosNode)(nil)
var _ fs.NodeListxattrer = (*PosNode)(nil)
var _ fs.NodeGetxattrer = (*PosNode)(nil)
var _ fs.NodeSetxattrer = (*PosNode)(nil)
var _ fs.NodeRemovexattrer = (*PosNode)(nil)
var _ fs.NodePoller = (*PosNode)(nil)
var _ fs.HandleReader = (*PosNode)(nil)
var (
_ fs.Node = (*PosNode)(nil)
_ fs.NodeOpener = (*PosNode)(nil)
_ fs.NodeForgetter = (*PosNode)(nil)
_ fs.NodeListxattrer = (*PosNode)(nil)
_ fs.NodeGetxattrer = (*PosNode)(nil)
_ fs.NodeSetxattrer = (*PosNode)(nil)
_ fs.NodeRemovexattrer = (*PosNode)(nil)
_ fs.NodePoller = (*PosNode)(nil)
_ fs.HandleReader = (*PosNode)(nil)
)

// PosNode represents a file that returns the current position of the database.
type PosNode struct {
Expand All @@ -35,7 +37,7 @@ func newPosNode(fsys *FileSystem, db *litefs.DB) *PosNode {
}

func (n *PosNode) Attr(ctx context.Context, attr *fuse.Attr) error {
attr.Mode = 0666
attr.Mode = 0o666
attr.Size = uint64(PosFileSize)
attr.Uid = uint32(n.fsys.Uid)
attr.Gid = uint32(n.fsys.Gid)
Expand All @@ -51,7 +53,7 @@ func (n *PosNode) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.Op
func (n *PosNode) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
pos := n.db.Pos()

data := fmt.Sprintf("%s/%016x\n", pos.TXID.String(), pos.PostApplyChecksum)
data := fmt.Sprintf("%s/%s\n", pos.TXID, pos.PostApplyChecksum)
if req.Offset >= int64(len(data)) {
return io.EOF
}
Expand Down
2 changes: 1 addition & 1 deletion go.mod
View file
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ require (
github.com/mattn/go-sqlite3 v1.14.16-0.20220918133448-90900be5db1a
github.com/prometheus/client_golang v1.13.0
github.com/superfly/litefs-go v0.0.0-20230227231337-34ea5dcf1e0b
github.com/superfly/ltx v0.3.12
github.com/superfly/ltx v0.3.13
golang.org/x/exp v0.0.0-20230515195305-f3d0a9c9a5cc
golang.org/x/net v0.0.0-20220909164309-bea034e7d591
golang.org/x/sync v0.0.0-20220601150217-0de741cfad7f
Expand Down
2 changes: 2 additions & 0 deletions go.sum
View file
Original file line number Diff line number Diff line change
Expand Up @@ -310,6 +310,8 @@ github.com/superfly/litefs-go v0.0.0-20230227231337-34ea5dcf1e0b h1:+WuhtZFB8fNd
github.com/superfly/litefs-go v0.0.0-20230227231337-34ea5dcf1e0b/go.mod h1:h+GUx1V2s0C5nY73ZN82760eWEJrpMaiDweF31VmJKk=
github.com/superfly/ltx v0.3.12 h1:Z7z1sc4g34/jUi3XO84+zBlIsbaoh2RJ3b4zTQpBK/M=
github.com/superfly/ltx v0.3.12/go.mod h1:ly+Dq7UVacQVEI5/b0r6j+PSNy9ibwx1yikcWAaSkhE=
github.com/superfly/ltx v0.3.13 h1:IbuocKJ6sY2jYvZbpUGMYmTkvaLSGUderEZwmaIUmJ0=
github.com/superfly/ltx v0.3.13/go.mod h1:ly+Dq7UVacQVEI5/b0r6j+PSNy9ibwx1yikcWAaSkhE=
github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqriFuLhtthL60Sar/7RFoluCcXsuvEwTV5KM=
github.com/tv42/httpunix v0.0.0-20191220191345-2ba4b9c3382c h1:u6SKchux2yDvFQnDHS3lPnIRmfVJ5Sxy3ao2SIdysLQ=
github.com/tv42/httpunix v0.0.0-20191220191345-2ba4b9c3382c/go.mod h1:hzIxponao9Kjc7aWznkXaL4U4TWaDSs8zcsY4Ka08nM=
Expand Down
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