forked from mirror/ledisdb
58 lines
1.0 KiB
Go
58 lines
1.0 KiB
Go
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package server
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import (
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"bufio"
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"errors"
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"github.com/siddontang/ledisdb/ledis"
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"io"
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"strconv"
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)
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var (
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errArrayFormat = errors.New("bad array format")
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errBulkFormat = errors.New("bad bulk string format")
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errLineFormat = errors.New("bad response line format")
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)
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func readLine(rb *bufio.Reader) ([]byte, error) {
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p, err := rb.ReadSlice('\n')
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if err != nil {
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return nil, err
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}
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i := len(p) - 2
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if i < 0 || p[i] != '\r' {
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return nil, errLineFormat
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}
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return p[:i], nil
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}
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func readBulkTo(rb *bufio.Reader, w io.Writer) error {
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l, err := readLine(rb)
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if len(l) == 0 {
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return errArrayFormat
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} else if l[0] == '$' {
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var n int
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//handle resp string
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if n, err = strconv.Atoi(ledis.String(l[1:])); err != nil {
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return err
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} else if n == -1 {
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return nil
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} else {
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if _, err = io.CopyN(w, rb, int64(n)); err != nil {
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return err
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}
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if l, err = readLine(rb); err != nil {
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return err
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} else if len(l) != 0 {
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return errBulkFormat
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}
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}
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} else {
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return errArrayFormat
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}
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return nil
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}
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