func TranscodePost(conversions map[string]FfmpegConversion) echo.HandlerFunc {
fn := func(c *echo.Context) error {
//The 0 here is important because it forces the file
//to be written to disk, causing us to cast it to os.File
c.Request().ParseMultipartForm(0)
mf, _, err := c.Request().FormFile("input")
if err != nil {
c.String(http.StatusBadRequest, "Error parsing input file.")
return err
}
input := mf.(*os.File)
defer os.Remove(input.Name())
output, err := ioutil.TempFile("", "output")
if err != nil {
c.String(http.StatusInternalServerError, "Error creating output file.")
return err
}
defer os.Remove(output.Name())
conversion, exists := conversions[c.Form("type")]
if !exists {
return c.String(http.StatusBadRequest, "Not a valid transcoding type.")
}
converter := ffmpeg.NewConverter(input.Name(), output.Name(), conversion.Scale,
conversion.VideoKilobitRate, conversion.AudioKilobitRate)
if err := converter.Transcode(); err != nil {
c.String(http.StatusInternalServerError, "Error transcoding the file.")
return err
}
c.Response().Header().Set(echo.ContentType, "video/mp4")
fi, err := output.Stat()
if err != nil {
c.String(http.StatusInternalServerError, "Error retrieving size of file.")
return err
}
c.Response().Header().Set(echo.ContentLength, strconv.FormatInt(fi.Size(), 10))
if err := c.File(output.Name(), "output.mp4", true); err != nil {
c.String(http.StatusInternalServerError, "Error sending file.")
return err
}
return nil
}
return fn
}
func TranscodeJsonPost(awsConfig AwsConfig, conversions map[string]FfmpegConversion) echo.HandlerFunc {
fn := func(c *echo.Context) error {
request := &client.TranscodeRequest{}
if err := c.Bind(request); err != nil {
return err //return Unsupported Media Type or BadRequest
}
svc := s3.New(session.New(&aws.Config{Region: aws.String(awsConfig.Region)}))
getObjectParams := &s3.GetObjectInput{
Bucket: aws.String(request.Input.Bucket),
Key: aws.String(request.Input.Key),
}
resp, err := svc.GetObject(getObjectParams)
if err != nil {
log.WithFields(log.Fields{
"error": err.Error(),
"code": err.(awserr.Error).Code(),
"message": err.(awserr.Error).Message(),
}).Warn("Issue occured fetching object.")
return err
}
input, err := ioutil.TempFile("", "s3Input")
if err != nil {
log.WithFields(log.Fields{
"error": err,
}).Error("Error creating s3 input temporary file.")
return err
}
defer os.Remove(input.Name())
//Copy over the buffer to the file
_, errCopy := io.Copy(input, resp.Body)
if errCopy != nil {
log.WithFields(log.Fields{
"error": errCopy,
}).Error("Error copying object to temporary input file")
return errCopy
}
conversion, ok := conversions[request.Type]
if !ok {
return errors.New("This type does not exists")
}
output, err := ioutil.TempFile("", "output")
if err != nil {
return err
}
defer os.Remove(output.Name())
converter := ffmpeg.NewConverter(input.Name(), output.Name(), conversion.Scale,
conversion.VideoKilobitRate, conversion.AudioKilobitRate)
if err := converter.Transcode(); err != nil {
return err
}
fi, _ := output.Stat()
//Begin Upload
putObjectParams := &s3.PutObjectInput{
Bucket: aws.String(request.Output.Bucket),
Key: aws.String(request.Output.Key),
ContentType: aws.String("video/mp4"),
ContentLength: aws.Int64(fi.Size()),
Body: output,
}
_, err1 := svc.PutObject(putObjectParams)
if err1 != nil {
log.WithFields(log.Fields{
"error": err1,
}).Error("Error putting s3 output temporary file.")
return err1
}
return nil
}
return fn
}