/
printer.go
54 lines (45 loc) · 1.18 KB
/
printer.go
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//nolint
package external
import (
"github.com/chen-keinan/kube-knark/pkg/model/netevent"
"io"
"os"
"sync"
)
var WaitGroup sync.WaitGroup
var PrinterWaitGroup sync.WaitGroup
// Printer output parsed http messages
type Printer struct {
OutputQueue chan *netevent.HTTPNetData
outputFile io.WriteCloser
}
var maxOutputQueueLen = 4096
func NewPrinter(matchChan chan *netevent.HTTPNetData) *Printer {
var outputFile io.WriteCloser
outputFile = os.Stdout
printer := &Printer{OutputQueue: make(chan *netevent.HTTPNetData, maxOutputQueueLen), outputFile: outputFile}
printer.start(matchChan)
return printer
}
func (p *Printer) Send(data *netevent.HTTPNetData) {
if len(data.HTTPRequestData.Method) == 0 ||
len(data.HTTPRequestData.Host) == 0 ||
len(data.HTTPRequestData.RequestURI) == 0 {
return
}
p.OutputQueue <- data
}
func (p *Printer) start(matchChan chan *netevent.HTTPNetData) {
PrinterWaitGroup.Add(1)
go p.printBackground(matchChan)
}
func (p *Printer) printBackground(matchChan chan *netevent.HTTPNetData) {
defer PrinterWaitGroup.Done()
defer p.outputFile.Close()
for msg := range p.OutputQueue {
matchChan <- msg
}
}
func (p *Printer) Finish() {
close(p.OutputQueue)
}