TUN-2243: Revert "STOR-519: Add db-connect, a SQL over HTTPS server"

This reverts commit 5da2109811.

vendor/github.com/kshvakov/clickhouse/lib/binary/compress_reader.go

@@ -1,107 +0,0 @@
-// +build !clz4
-
-package binary
-
-import (
-	"encoding/binary"
-	"fmt"
-	"io"
-
-	"github.com/kshvakov/clickhouse/lib/lz4"
-)
-
-type compressReader struct {
-	reader io.Reader
-	// data uncompressed
-	data []byte
-	// data position
-	pos int
-	// data compressed
-	zdata []byte
-	// lz4 headers
-	header []byte
-}
-
-// NewCompressReader wrap the io.Reader
-func NewCompressReader(r io.Reader) *compressReader {
-	p := &compressReader{
-		reader: r,
-		header: make([]byte, HeaderSize),
-	}
-	p.data = make([]byte, BlockMaxSize, BlockMaxSize)
-
-	zlen := lz4.CompressBound(BlockMaxSize) + HeaderSize
-	p.zdata = make([]byte, zlen, zlen)
-
-	p.pos = len(p.data)
-	return p
-}
-
-func (cr *compressReader) Read(buf []byte) (n int, err error) {
-	var bytesRead = 0
-	n = len(buf)
-
-	if cr.pos < len(cr.data) {
-		copyedSize := copy(buf, cr.data[cr.pos:])
-
-		bytesRead += copyedSize
-		cr.pos += copyedSize
-	}
-
-	for bytesRead < n {
-		if err = cr.readCompressedData(); err != nil {
-			return bytesRead, err
-		}
-		copyedSize := copy(buf[bytesRead:], cr.data)
-
-		bytesRead += copyedSize
-		cr.pos = copyedSize
-	}
-	return n, nil
-}
-
-func (cr *compressReader) readCompressedData() (err error) {
-	cr.pos = 0
-	var n int
-	n, err = cr.reader.Read(cr.header)
-	if err != nil {
-		return
-	}
-	if n != len(cr.header) {
-		return fmt.Errorf("Lz4 decompression header EOF")
-	}
-
-	compressedSize := int(binary.LittleEndian.Uint32(cr.header[17:])) - 9
-	decompressedSize := int(binary.LittleEndian.Uint32(cr.header[21:]))
-
-	if compressedSize > cap(cr.zdata) {
-		cr.zdata = make([]byte, compressedSize)
-	}
-	if decompressedSize > cap(cr.data) {
-		cr.data = make([]byte, decompressedSize)
-	}
-
-	cr.zdata = cr.zdata[:compressedSize]
-	cr.data = cr.data[:decompressedSize]
-
-	// @TODO checksum
-	if cr.header[16] == LZ4 {
-		n, err = cr.reader.Read(cr.zdata)
-		if err != nil {
-			return
-		}
-
-		if n != len(cr.zdata) {
-			return fmt.Errorf("Decompress read size not match")
-		}
-
-		_, err = lz4.Decode(cr.data, cr.zdata)
-		if err != nil {
-			return
-		}
-	} else {
-		return fmt.Errorf("Unknown compression method: 0x%02x ", cr.header[16])
-	}
-
-	return nil
-}