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dash.go
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dash.go
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package stream
import (
"154.pages.dev/stream/dash"
"154.pages.dev/stream/mp4"
"154.pages.dev/widevine"
"errors"
"fmt"
"net/http"
"net/url"
"os"
option "154.pages.dev/http"
)
type Stream struct {
Base *url.URL
Client_ID string
Info bool
Name string
Poster widevine.Poster
Private_Key string
}
func (s Stream) DASH_Get(items []dash.Representation, index int) error {
if s.Info {
for i, item := range items {
fmt.Println()
if i == index {
fmt.Print("!")
}
fmt.Println(item)
}
return nil
}
item := items[index]
file, err := func() (*os.File, error) {
ext, ok := item.Ext()
if !ok {
return nil, errors.New("extension")
}
return os.Create(s.Name + ext)
}()
if err != nil {
return err
}
defer file.Close()
req, err := func() (*http.Request, error) {
i, ok := item.Initialization()
if !ok {
return nil, errors.New("initialization")
}
return http.NewRequest("GET", i, nil)
}()
if err != nil {
return err
}
req.URL = s.Base.ResolveReference(req.URL)
res, err := http.DefaultClient.Do(req)
if err != nil {
return err
}
defer res.Body.Close()
dec := make(mp4.Decrypt)
if err := dec.Init(res.Body, file); err != nil {
return err
}
private_key, err := os.ReadFile(s.Private_Key)
if err != nil {
return err
}
client_ID, err := os.ReadFile(s.Client_ID)
if err != nil {
return err
}
pssh, err := item.Widevine()
if err != nil {
return err
}
mod, err := widevine.New_Module(private_key, client_ID, pssh)
if err != nil {
return err
}
key, err := mod.Key(s.Poster)
if err != nil {
return err
}
option.Silent()
media := item.Media()
pro := option.Progress_Parts(len(media))
for _, ref := range media {
// with DASH, initialization and media URLs are relative to the MPD URL
req.URL, err = s.Base.Parse(ref)
if err != nil {
return err
}
res, err := http.DefaultClient.Do(req)
if err != nil {
return err
}
if err := dec.Segment(pro.Reader(res), file, key); err != nil {
return err
}
if err := res.Body.Close(); err != nil {
return err
}
}
return nil
}