owncast/core/rtmp/utils.go

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package rtmp
import (
"crypto/subtle"
"encoding/json"
"errors"
"fmt"
"regexp"
"strings"
"github.com/nareix/joy5/format/flv/flvio"
"github.com/owncast/owncast/models"
log "github.com/sirupsen/logrus"
)
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const unknownString = "Unknown"
var _getInboundDetailsFromMetadataRE = regexp.MustCompile(`\{(.*?)\}`)
func getInboundDetailsFromMetadata(metadata []interface{}) (models.RTMPStreamMetadata, error) {
metadataComponentsString := fmt.Sprintf("%+v", metadata)
if !strings.Contains(metadataComponentsString, "onMetaData") {
return models.RTMPStreamMetadata{}, errors.New("Not a onMetaData message")
}
submatchall := _getInboundDetailsFromMetadataRE.FindAllString(metadataComponentsString, 1)
if len(submatchall) == 0 {
return models.RTMPStreamMetadata{}, errors.New("unable to parse inbound metadata")
}
metadataJSONString := submatchall[0]
var details models.RTMPStreamMetadata
err := json.Unmarshal([]byte(metadataJSONString), &details)
return details, err
}
func getAudioCodec(codec interface{}) string {
if codec == nil {
return "No audio"
}
var codecID float64
if assertedCodecID, ok := codec.(float64); ok {
codecID = assertedCodecID
} else {
return codec.(string)
}
switch codecID {
case flvio.SOUND_MP3:
return "MP3"
case flvio.SOUND_AAC:
return "AAC"
case flvio.SOUND_SPEEX:
return "Speex"
}
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return unknownString
}
func getVideoCodec(codec interface{}) string {
if codec == nil {
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return unknownString
}
var codecID float64
if assertedCodecID, ok := codec.(float64); ok {
codecID = assertedCodecID
} else {
return codec.(string)
}
switch codecID {
case flvio.VIDEO_H264:
return "H.264"
case flvio.VIDEO_H265:
return "H.265"
}
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return unknownString
}
func secretMatch(configStreamKey string, path string) bool {
prefix := "/live/"
if !strings.HasPrefix(path, prefix) {
log.Debug("RTMP path does not start with " + prefix)
return false // We need the path to begin with $prefix
}
streamingKey := path[len(prefix):] // Remove $prefix
matches := subtle.ConstantTimeCompare([]byte(streamingKey), []byte(configStreamKey)) == 1
return matches
}