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|
package eows
import (
"bufio"
"io"
"strings"
"time"
)
// scanChars - gain character by character (or as soon as one or more characters are available)
func scanChars(data []byte, atEOF bool) (advance int, token []byte, err error) {
if atEOF && len(data) == 0 {
return 0, nil, nil
}
return len(data), data, nil
}
// _pumper is in charge to collect
func (e *ExecOverWS) _pumper(sc *bufio.Scanner, fctCB func(s string)) {
// Select split function (default sc.ScanLines)
if e.OutSplit == SplitChar || e.OutSplit == SplitLineTime || e.OutSplit == SplitTime {
sc.Split(scanChars)
}
// Scan method according to split type
if e.OutSplit == SplitLineTime || e.OutSplit == SplitTime {
t0 := time.Now()
buf := ""
for sc.Scan() {
buf += sc.Text()
if time.Since(t0).Nanoseconds() > e.LineTimeSpan ||
(e.OutSplit == SplitLineTime && strings.Contains(buf, "\n")) {
fctCB(buf)
buf = ""
t0 = time.Now()
}
if e.procExited {
break
}
}
// Send remaining characters
if len(buf) > 0 {
fctCB(buf)
}
} else {
for sc.Scan() {
fctCB(sc.Text())
if e.procExited {
break
}
}
}
}
// pipePumpStdout is in charge to forward stdout in websocket
func (e *ExecOverWS) pipePumpStdout(r io.Reader, done chan struct{}) {
sc := bufio.NewScanner(r)
e._pumper(sc, func(b string) {
if e.OutputCB != nil {
e.OutputCB(e, []byte(b), []byte{})
}
})
e.logDebug("STDOUT pump exit")
if sc.Err() != nil && !strings.Contains(sc.Err().Error(), "file already closed") {
e.logError("stdout scan: %v", sc.Err())
}
close(done)
}
// pipePumpStderr is in charge to forward stderr in websocket
func (e *ExecOverWS) pipePumpStderr(r io.Reader) {
sc := bufio.NewScanner(r)
e._pumper(sc, func(b string) {
if e.OutputCB != nil {
e.OutputCB(e, []byte{}, []byte(b))
}
})
e.logDebug("STDERR pump exit")
if sc.Err() != nil && !strings.Contains(sc.Err().Error(), "file already closed") {
e.logError("stderr scan: %v", sc.Err())
}
}
// ptsPumpStdout is in charge to forward stdout in websocket
// (only used when PtyMode is set)
func (e *ExecOverWS) ptsPumpStdout(r io.Reader, done chan struct{}) {
buffer := make([]byte, 1024)
for {
n, err := r.Read(buffer)
if err != nil {
if err != io.EOF &&
!strings.Contains(err.Error(), "file already closed") {
e.logError("Error stdout read: %v", err)
}
break
}
if n == 0 {
continue
}
if e.OutputCB != nil {
e.OutputCB(e, buffer[:n], []byte{})
}
}
close(done)
e.logDebug("Eows stdout pump exited")
}
|
