101 lines
1.7 KiB
Go
101 lines
1.7 KiB
Go
package sonic
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import (
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"bufio"
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"bytes"
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"errors"
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"fmt"
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"io"
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"net"
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"strconv"
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"strings"
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"unicode"
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)
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type connection struct {
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reader *bufio.Reader
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conn net.Conn
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cmdMaxBytes int
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closed bool
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}
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func newConnection(d *driver) (*connection, error) {
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c := &connection{}
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c.close()
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conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", d.Host, d.Port))
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if err != nil {
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return nil, err
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}
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c.closed = false
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c.conn = conn
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c.reader = bufio.NewReader(c.conn)
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err = c.write(fmt.Sprintf("START %s %s", d.channel, d.Password))
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if err != nil {
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return nil, err
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}
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_, err = c.read()
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_, err = c.read()
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if err != nil {
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return nil, err
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}
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return c, nil
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}
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func (c *connection) read() (string, error) {
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if c.closed {
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return "", ErrClosed
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}
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buffer := bytes.Buffer{}
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for {
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line, isPrefix, err := c.reader.ReadLine()
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buffer.Write(line)
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if err != nil {
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if err == io.EOF {
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c.close()
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}
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return "", err
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}
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if !isPrefix {
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break
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}
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}
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str := buffer.String()
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if strings.HasPrefix(str, "ERR ") {
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return "", errors.New(str[4:])
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}
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if strings.HasPrefix(str, "STARTED ") {
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ss := strings.FieldsFunc(str, func(r rune) bool {
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if unicode.IsSpace(r) || r == '(' || r == ')' {
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return true
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}
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return false
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})
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bufferSize, err := strconv.Atoi(ss[len(ss)-1])
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if err != nil {
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return "", errors.New(fmt.Sprintf("Unable to parse STARTED response: %s", str))
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}
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c.cmdMaxBytes = bufferSize
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}
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return str, nil
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}
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func (c connection) write(str string) error {
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if c.closed {
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return ErrClosed
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}
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_, err := c.conn.Write([]byte(str + "\r\n"))
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return err
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}
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func (c *connection) close() {
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if c.conn != nil {
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_ = c.conn.Close()
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c.conn = nil
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}
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c.closed = true
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c.reader = nil
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}
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