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cam2mjpeg/mjpeg.go
2019-02-10 01:08:21 +01:00

61 lines
1.3 KiB
Go

package main
import (
"fmt"
"mime/multipart"
"net/http"
"net/textproto"
log "github.com/sirupsen/logrus"
)
func handleMJPEG(res http.ResponseWriter, r *http.Request, imgs chan []byte, uid string) {
if r.Method != "GET" {
http.Error(res, "405 Method Not Allowed", http.StatusMethodNotAllowed)
return
}
logger := log.WithField("id", uid)
mimeWriter := multipart.NewWriter(res)
mimeWriter.SetBoundary("--boundary")
defer mimeWriter.Close()
res.Header().Add("Connection", "close")
res.Header().Add("Cache-Control", "no-store, no-cache")
res.Header().Add("Content-Type", fmt.Sprintf("multipart/x-mixed-replace;boundary=%s", mimeWriter.Boundary()))
cn := res.(http.CloseNotifier).CloseNotify()
errC := 0
for {
select {
case <-cn:
return
case img := <-imgs:
partHeader := make(textproto.MIMEHeader)
partHeader.Add("Content-Type", "image/jpeg")
partWriter, err := mimeWriter.CreatePart(partHeader)
if err != nil {
logger.WithError(err).Error("Unable to create mime part")
continue
}
_, err = partWriter.Write(img)
if err != nil {
logger.WithError(err).Error("Unable to write image")
errC++
if errC > 5 {
logger.Error("Too many errors, killing connection")
return
}
continue
}
errC = 0
}
}
}