-
Notifications
You must be signed in to change notification settings - Fork 2
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
4 changed files
with
177 additions
and
18 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| package controllers | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "bytes" | ||
| "ch/kirari04/videocms/helpers" | ||
| "ch/kirari04/videocms/inits" | ||
| "ch/kirari04/videocms/models" | ||
| "fmt" | ||
| "io" | ||
| "log" | ||
| "net/http" | ||
| "os/exec" | ||
| "regexp" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/gofiber/fiber/v2" | ||
| ) | ||
|
|
||
| func DownloadVideoController(c *fiber.Ctx) error { | ||
| type Request struct { | ||
| UUID string `validate:"required,uuid_rfc4122"` | ||
| QUALITY string `validate:"required,min=1,max=10"` | ||
| } | ||
| var requestValidation Request | ||
| if err := c.ParamsParser(&requestValidation); err != nil { | ||
| return c.Status(fiber.StatusBadRequest).SendString("Invalid body request format") | ||
| } | ||
|
|
||
| if errors := helpers.ValidateStruct(requestValidation); len(errors) > 0 { | ||
| return c.Status(fiber.StatusBadRequest).SendString(fmt.Sprintf("%s [%s] : %s", errors[0].FailedField, errors[0].Tag, errors[0].Value)) | ||
| } | ||
|
|
||
| reQUALITY := regexp.MustCompile(`^([0-9]{3,4}p|(h264|vp9|av1))$`) | ||
| if !reQUALITY.MatchString(requestValidation.QUALITY) { | ||
| return c.Status(fiber.StatusBadRequest).SendString("bad quality format") | ||
| } | ||
|
|
||
| //translate link id to file id | ||
| var dbLink models.Link | ||
| if dbRes := inits.DB. | ||
| Model(&models.Link{}). | ||
| Preload("File"). | ||
| Preload("File.Subtitles"). | ||
| Preload("File.Audios"). | ||
| Preload("File.Qualitys"). | ||
| Where(&models.Link{ | ||
| UUID: requestValidation.UUID, | ||
| }). | ||
| First(&dbLink); dbRes.Error != nil { | ||
| return c.Status(fiber.StatusBadRequest).SendString("video doesn't exist") | ||
| } | ||
| files := []string{} | ||
|
|
||
| // add video | ||
| for _, quality := range dbLink.File.Qualitys { | ||
| if quality.Name == requestValidation.QUALITY { | ||
| files = append(files, "-i", fmt.Sprintf( | ||
| "%s/%s", | ||
| quality.Path, | ||
| quality.OutputFile, | ||
| )) | ||
| } | ||
| } | ||
|
|
||
| // add audios | ||
| for _, audio := range dbLink.File.Audios { | ||
| files = append(files, "-i", fmt.Sprintf( | ||
| "%s/%s", | ||
| audio.Path, | ||
| audio.OutputFile, | ||
| )) | ||
| } | ||
|
|
||
| // add subtitles | ||
| for _, subtitle := range dbLink.File.Subtitles { | ||
| files = append(files, "-i", fmt.Sprintf( | ||
| "%s/%s", | ||
| subtitle.Path, | ||
| subtitle.OutputFile, | ||
| )) | ||
| } | ||
|
|
||
| cmdString := append(files, []string{"-map", "0", "-c", "copy", "-f", "matroska", "pipe:1"}...) | ||
|
|
||
| cmd := exec.Command("ffmpeg", cmdString...) | ||
| pipe, err := cmd.StdoutPipe() | ||
| if err != nil { | ||
| log.Println("Failed to create stdout pipe") | ||
| return nil | ||
| } | ||
|
|
||
| if err := cmd.Start(); err != nil { | ||
| log.Println("Failed to run cmd", err) | ||
| return nil | ||
| } | ||
|
|
||
| c.Response().StreamBody = true | ||
| c.Response().ImmediateHeaderFlush = true | ||
|
|
||
| c.Response().Header.Set(fiber.HeaderContentType, "video/x-matroska") | ||
| c.Response().Header.Set(fiber.HeaderTransferEncoding, "chunked") | ||
| c.Response().Header.Set(fiber.HeaderTrailer, "AtEnd") | ||
| c.Response().Header.Set(fiber.HeaderCacheControl, "no-cache") | ||
| c.Response().Header.Set(fiber.HeaderContentDisposition, `attachment; filename="video.mkv"`) | ||
| c.Status(http.StatusOK) | ||
|
|
||
| var wg sync.WaitGroup | ||
| var written int64 | ||
| var speedA int64 = 10 * 1024 | ||
| var speedB int64 = 10 * 1024 * 1024 | ||
| writer := make(chan []byte, 10*1024*1024) | ||
| c.Response().SetBodyStreamWriter(func(w *bufio.Writer) { | ||
| for { | ||
| b, ok := <-writer | ||
| if !ok { | ||
| log.Println("stopped channel") | ||
| break | ||
| } | ||
| w.Write(b) | ||
| w.Flush() | ||
| } | ||
| }) | ||
| wg.Add(1) | ||
| go func() { | ||
| defer wg.Done() | ||
| defer pipe.Close() | ||
| for { | ||
| timeStart := time.Now().UnixMilli() | ||
| var b bytes.Buffer | ||
| n, err := io.CopyN(&b, pipe, speedA) | ||
| if err != nil { | ||
| if err.Error() != "EOF" { | ||
| log.Println("Failed to write to buffer", err) | ||
| } | ||
| break | ||
| } | ||
| if n > 0 { | ||
| writer <- b.Bytes() | ||
| written = written + n | ||
| } | ||
| timeEnd := time.Now().UnixMilli() | ||
| timeDif := timeEnd - timeStart | ||
| c.Response().Header.Set(fiber.HeaderContentLength, fmt.Sprintf("%d", written)) | ||
| time.Sleep(time.Second - (time.Millisecond * time.Duration(timeDif))) | ||
| if speedA < speedB { | ||
| speedA = speedA * 2 | ||
| if speedA > speedB { | ||
| speedA = speedB | ||
| } | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| wg.Wait() | ||
| cmd.Wait() | ||
| close(writer) | ||
| log.Println("finished") | ||
| return nil | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters