├── .dockerignore ├── Dockerfile ├── LICENSE ├── README.md ├── go.mod ├── go.sum ├── main.go ├── mockdl.go └── ytdl.go /.dockerignore: -------------------------------------------------------------------------------- 1 | Dockerfile 2 | **.md 3 | .git 4 | -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | FROM golang:1-alpine AS build 2 | RUN apk add --no-cache git 3 | WORKDIR /src/app 4 | COPY . . 5 | RUN CGO_ENABLED=0 GOOS=linux go build -o /server . 6 | 7 | FROM vimagick/youtube-dl 8 | COPY --from=build /server /server 9 | ENTRYPOINT ["/server"] 10 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. 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We also recommend that a 186 | file or class name and description of purpose be included on the 187 | same "printed page" as the copyright notice for easier 188 | identification within third-party archives. 189 | 190 | Copyright [yyyy] [name of copyright owner] 191 | 192 | Licensed under the Apache License, Version 2.0 (the "License"); 193 | you may not use this file except in compliance with the License. 194 | You may obtain a copy of the License at 195 | 196 | http://www.apache.org/licenses/LICENSE-2.0 197 | 198 | Unless required by applicable law or agreed to in writing, software 199 | distributed under the License is distributed on an "AS IS" BASIS, 200 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 201 | See the License for the specific language governing permissions and 202 | limitations under the License. 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Serverless video downloader (`youtube-dl`) 2 | 3 | A serverless application that uses `youtube-dl` to quickly download and stream 4 | videos from media sites. 5 | 6 | Deploy to Google Cloud Run: 7 | 8 | [![Run on Google Cloud](https://deploy.cloud.run/button.svg)](https://deploy.cloud.run) 9 | 10 | Then visit your application with `?url=` parameter to download a video: 11 | 12 | https:///?url=https://www.youtube.com/watch?v=jHjFxJVeCQs 13 | 14 | Currently the maximum [response time limit](https://cloud.google.com/run/quotas) on Cloud Run 15 | is 60 minutes, so that's how long you can download content for, and you 16 | should set this explicitly on your app. 17 | 18 | --- 19 | 20 | This project is not affiliated with Google. It's created 21 | for demonstration purposes. 22 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module ytdl 2 | 3 | go 1.13 4 | 5 | require github.com/wader/goutubedl v0.0.0-20190922211401-181d7b2a30af // indirect 6 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | github.com/fortytw2/leaktest v1.3.0/go.mod h1:jDsjWgpAGjm2CA7WthBh/CdZYEPF31XHquHwclZch5g= 2 | github.com/wader/goutubedl v0.0.0-20190922211401-181d7b2a30af h1:2EdtfPmmeCwrwdxKZANc5YM4HEbCAvGYnJXVGKiCPaQ= 3 | github.com/wader/goutubedl v0.0.0-20190922211401-181d7b2a30af/go.mod h1:TEOvzRw4YvTeOdSvGyoZD9KbKK4xbx0EJoSqj4v6yAs= 4 | github.com/wader/osleaktest v0.0.0-20190723190525-c53af4cfc4a3/go.mod h1:XD6emOFPHVzb0+qQpiNOdPL2XZ0SRUM0N5JHuq6OmXo= 5 | -------------------------------------------------------------------------------- /main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "github.com/wader/goutubedl" 6 | "io" 7 | "log" 8 | "net/http" 9 | "os" 10 | "os/exec" 11 | "time" 12 | ) 13 | 14 | const ( 15 | maxDuration = time.Second * 60 16 | ) 17 | 18 | type Info struct { 19 | ext string 20 | id string 21 | duration time.Duration 22 | } 23 | 24 | type Downloader interface { 25 | Info(url string) (Info, error) 26 | Download(url string) (io.ReadCloser, error) 27 | } 28 | 29 | func main() { 30 | addr := "" 31 | port := os.Getenv("PORT") 32 | if port == "" { 33 | addr, port = "localhost", "8080" 34 | } 35 | http.HandleFunc("/", handler) 36 | http.ListenAndServe(addr+":"+port, nil) 37 | } 38 | 39 | func handler(w http.ResponseWriter, req *http.Request) { 40 | u := req.URL.Query().Get("url") 41 | if u == "" { 42 | w.WriteHeader(http.StatusBadRequest) 43 | fmt.Fprint(w, "?url= not specified") 44 | return 45 | } 46 | start := time.Now() 47 | log.Printf("start url=%s", u) 48 | defer func() { log.Printf("done url=%s took=%v", u, time.Since(start)) }() 49 | 50 | var d Downloader 51 | 52 | if _, err := exec.LookPath(goutubedl.Path); err == nil { 53 | log.Printf("initializing real downloader") 54 | d = new(ytdl) 55 | } else { 56 | log.Printf("initializing mock downloader") 57 | d = new(mockDownloader) 58 | } 59 | 60 | i, err := d.Info(u) 61 | if err != nil { 62 | w.WriteHeader(http.StatusInternalServerError) 63 | fmt.Fprintf(w, "failed to fetch video info: %v", err) 64 | return 65 | } 66 | log.Printf("found video %s format=%s (len=%v)", i.id, i.ext, i.duration) 67 | 68 | if i.duration > maxDuration { 69 | w.WriteHeader(http.StatusInternalServerError) 70 | fmt.Fprintf(w, "video too long (%v), max allowed=%v", i.duration, maxDuration) 71 | return 72 | } 73 | 74 | s, err := d.Download(u) 75 | if err != nil { 76 | w.WriteHeader(http.StatusInternalServerError) 77 | fmt.Fprintf(w, "failed to download video: %v", err) 78 | return 79 | } 80 | 81 | fn := fmt.Sprintf("%s.%s", i.id, i.ext) 82 | w.Header().Set("Content-Disposition", "attachment; filename="+fn) 83 | w.Header().Set("Content-Type", "application/octet-stream") 84 | n, err := io.Copy(w, s) 85 | if err != nil { 86 | log.Printf("failed to copy resp body after %d bytes: %v", n, err) 87 | return 88 | } 89 | log.Printf("successfully copied %d bytes to response", n) 90 | } 91 | -------------------------------------------------------------------------------- /mockdl.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "crypto/rand" 5 | "io" 6 | "io/ioutil" 7 | "time" 8 | ) 9 | 10 | type mockDownloader struct{} 11 | 12 | func (f mockDownloader) Info(_ string) (Info, error) { 13 | return Info{ 14 | ext: "mp4", 15 | id: "some_id", 16 | duration: time.Second * 100, 17 | }, nil 18 | } 19 | 20 | func (f mockDownloader) Download(_ string) (io.ReadCloser, error) { 21 | r := rand.Reader 22 | time.Sleep(time.Millisecond*200) 23 | return ioutil.NopCloser(io.LimitReader(r, 10*1024)), nil 24 | } 25 | -------------------------------------------------------------------------------- /ytdl.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "context" 5 | "errors" 6 | "github.com/wader/goutubedl" 7 | "io" 8 | "time" 9 | ) 10 | 11 | type ytdl struct{ 12 | res *goutubedl.Result 13 | } 14 | 15 | func (y *ytdl) Info(url string) (Info, error) { 16 | r, err := goutubedl.New(context.TODO(), url, goutubedl.Options{}) 17 | if err != nil { 18 | return Info{}, err 19 | } 20 | y.res = &r 21 | return Info{ 22 | ext: r.Info.Ext, 23 | id: r.Info.ID, 24 | duration: time.Duration(int64(r.Info.Duration)) * time.Second, 25 | }, nil 26 | } 27 | 28 | func (y *ytdl) Download(url string) (io.ReadCloser, error) { 29 | if y.res == nil { 30 | return nil, errors.New("call Info() first to get download details") 31 | } 32 | return y.res.Download(context.TODO(),"best") 33 | } 34 | --------------------------------------------------------------------------------