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# Auto detect text files and perform LF normalization
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# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, build with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out

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GNU GENERAL PUBLIC LICENSE
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You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

34
PKGBUILD Normal file
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@ -0,0 +1,34 @@
pkgname=promodj
pkgver=0.1.1
pkgrel=0
pkgdesc="Proxy client for promodj.com"
arch=('x86_64' 'aarch64')
license=('GPL')
url='https://github.com/nxshock/$pkgname'
depends=('ffmpeg')
makedepends=('go' 'git')
options=("!strip")
backup=("etc/$pkgname.toml")
source=("git+https://github.com/nxshock/$pkgname.git")
sha256sums=('SKIP')
build() {
cd "$srcdir/$pkgname"
export CGO_CPPFLAGS="${CPPFLAGS}"
export CGO_CFLAGS="${CFLAGS}"
export CGO_CXXFLAGS="${CXXFLAGS}"
export CGO_LDFLAGS="${LDFLAGS}"
go build -o $pkgname -buildmode=pie -trimpath -ldflags="-linkmode=external -s -w"
}
package() {
cd "$srcdir/$pkgname"
install -Dm755 "$pkgname" "$pkgdir/usr/bin/$pkgname"
install -Dm644 "$pkgname.conf" "$pkgdir/etc/$pkgname.conf"
install -Dm644 "$pkgname.service" "$pkgdir/usr/lib/systemd/system/$pkgname.service"
install -Dm644 "$pkgname.sysusers" "$pkgdir/usr/lib/sysusers.d/$pkgname.conf"
mkdir "$pkgdir/usr/lib/$pkgname"
cp -R "site" "$pkgdir/usr/lib/$pkgname"
cp -R "templates" "$pkgdir/usr/lib/$pkgname"
}

42
config.go Normal file
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package main
import (
"errors"
"github.com/BurntSushi/toml"
"github.com/creasty/defaults"
"github.com/gookit/validate"
)
// Config represents configuration
type Config struct {
ListenAddr string `default:":80" validate:"required`
// Mb
BufferSize uint `default:"32" validate:"required|min:1`
// Kb
Bitrate uint `default:"32" validate:"required|min:8|max:320"`
Codec string `default:"libopus" validate:"required"`
Format string `default:"opus" validate:"required" `
ContentType string `default:"audio/ogg" validate:"required" `
}
var config *Config
func initConfig(filePath string) error {
if _, err := toml.DecodeFile(filePath, &config); err != nil {
return err
}
if err := defaults.Set(config); err != nil {
return err
}
if v := validate.Struct(config); !v.Validate() {
return errors.New(v.Errors.One())
}
return nil
}

5
consts.go Normal file
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@ -0,0 +1,5 @@
package main
const (
defaultConfigFilePath = "/etc/promodj.conf"
)

15
go.mod Normal file
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@ -0,0 +1,15 @@
module github.com/nxshock/promodj
go 1.16
require (
github.com/BurntSushi/toml v0.4.1
github.com/PuerkitoBio/goquery v1.7.1
github.com/creasty/defaults v1.5.1
github.com/djherbis/buffer v1.2.0 // indirect
github.com/gookit/goutil v0.3.15 // indirect
github.com/gookit/validate v1.2.11
golang.org/x/net v0.0.0-20210813160813-60bc85c4be6d // indirect
gopkg.in/djherbis/buffer.v1 v1.1.0
gopkg.in/djherbis/nio.v2 v2.0.3
)

64
go.sum Normal file
View File

@ -0,0 +1,64 @@
github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw=
github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
github.com/PuerkitoBio/goquery v1.7.1 h1:oE+T06D+1T7LNrn91B4aERsRIeCLJ/oPSa6xB9FPnz4=
github.com/PuerkitoBio/goquery v1.7.1/go.mod h1:XY0pP4kfraEmmV1O7Uf6XyjoslwsneBbgeDjLYuN8xY=
github.com/andybalholm/cascadia v1.2.0 h1:vuRCkM5Ozh/BfmsaTm26kbjm0mIOM3yS5Ek/F5h18aE=
github.com/andybalholm/cascadia v1.2.0/go.mod h1:YCyR8vOZT9aZ1CHEd8ap0gMVm2aFgxBp0T0eFw1RUQY=
github.com/creasty/defaults v1.5.1 h1:j8WexcS3d/t4ZmllX4GEkl4wIB/trOr035ajcLHCISM=
github.com/creasty/defaults v1.5.1/go.mod h1:FPZ+Y0WNrbqOVw+c6av63eyHUAl6pMHZwqLPvXUZGfY=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/djherbis/buffer v1.2.0 h1:PH5Dd2ss0C7CRRhQCZ2u7MssF+No9ide8Ye71nPHcrQ=
github.com/djherbis/buffer v1.2.0/go.mod h1:fjnebbZjCUpPinBRD+TDwXSOeNQ7fPQWLfGQqiAiUyE=
github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
github.com/gookit/color v1.3.8/go.mod h1:R3ogXq2B9rTbXoSHJ1HyUVAZ3poOJHpd9nQmyGZsfvQ=
github.com/gookit/color v1.4.2/go.mod h1:fqRyamkC1W8uxl+lxCQxOT09l/vYfZ+QeiX3rKQHCoQ=
github.com/gookit/filter v1.1.2 h1:mp6zSRaRhGuoGZNUlZR4W0/1OTwKRUI5qCXEtD02BR0=
github.com/gookit/filter v1.1.2/go.mod h1:pVXLLDD+A8yH9GRztq2Cp7zwZocnuTUpbZs9Q+awAKM=
github.com/gookit/goutil v0.3.12 h1:FG7aYlftz17uq8szHlvR/Ao6k8wXkEWhiYh2lkk8Xxg=
github.com/gookit/goutil v0.3.12/go.mod h1:ITj7Lw0muhJNOX+QRa+j+HH0+RNoQVuTmZx5d5LE1vE=
github.com/gookit/goutil v0.3.15 h1:nfMiE1nlBES16zOsLzNeR/vo6a7KlV58womgG6dB+JM=
github.com/gookit/goutil v0.3.15/go.mod h1:2w7h+/CB6n2m4qzECHj6+TOmMR8q7ierD9+LyybGy3I=
github.com/gookit/validate v1.2.11 h1:zUMsezhMrW3Cy8St3cQJgCKB1ZIbKOWK8e7WMSuVIRc=
github.com/gookit/validate v1.2.11/go.mod h1:wXo0Vr+AzFUCEUCbTFXgKlPfT+V/V0wPK3zLp49jQq0=
github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
github.com/mattn/go-isatty v0.0.13/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778/go.mod h1:2MuV+tbUrU1zIOPMxZ5EncGwgmMJsa+9ucAQZXxsObs=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20210614182718-04defd469f4e h1:XpT3nA5TvE525Ne3hInMh6+GETgn27Zfm9dxsThnX2Q=
golang.org/x/net v0.0.0-20210614182718-04defd469f4e/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/net v0.0.0-20210813160813-60bc85c4be6d h1:LO7XpTYMwTqxjLcGWPijK3vRXg1aWdlNOVOHRq45d7c=
golang.org/x/net v0.0.0-20210813160813-60bc85c4be6d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/djherbis/buffer.v1 v1.1.0 h1:FtLHNv0nftk4Kyl+jfsWrVUCt0GHnZcD6q0WDtBn2ME=
gopkg.in/djherbis/buffer.v1 v1.1.0/go.mod h1:YmtM9HtEOmQK8iHPVpK8EhYmVq5Kdekac3Qdbs5KJPM=
gopkg.in/djherbis/nio.v2 v2.0.3 h1:GV76XfYUQjScV0wVKruEyqN48jrng+g63ckfkDOnlHA=
gopkg.in/djherbis/nio.v2 v2.0.3/go.mod h1:APzEZFGm9Q+QzSl8yResRU/4xnWJtY3onKsxwnQdeNM=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

51
handlers.go Normal file
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@ -0,0 +1,51 @@
package main
import (
"fmt"
"net/http"
)
func handleGenres(w http.ResponseWriter, r *http.Request) {
if r.RequestURI != "/" {
http.Error(w, "not found", http.StatusNotFound)
return
}
data := struct {
Domain string
Genres []Genre
}{
Domain: r.Host,
Genres: Genres}
err := templates.Lookup("genres.html").Execute(w, data)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
func handleGetM3u(w http.ResponseWriter, r *http.Request) {
genreCode := r.FormValue("genre")
if genreCode == "" {
http.Error(w, `"genre" field is not specified`, http.StatusBadRequest)
return
}
tracks, err := tracksByGenre(genreCode)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
b := tracksToM3u(r.Host, tracks)
w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.m3u8"`, genreCode))
w.Header().Set("Content-Type", "audio/x-mpegurl")
w.Header().Set("Accept-Ranges", "none")
w.Write(b)
}
func handleStream(w http.ResponseWriter, r *http.Request) {
stream(r.FormValue("url"), w)
}

66
main.go Normal file
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package main
import (
"embed"
"html/template"
"log"
"net/http"
"os"
"time"
_ "embed"
)
//go:embed templates/genres.html
var templateBytes embed.FS
var templates *template.Template
func init() {
log.SetFlags(0)
if len(os.Args) == 2 {
if err := initConfig(os.Args[1]); err != nil {
log.Fatalln("config error:", err)
}
} else {
if err := initConfig(defaultConfigFilePath); err != nil {
log.Fatalln("config error:", err)
}
}
err := initTepmplates()
if err != nil {
log.Fatalln(err)
}
err = UpdateGenres()
if err != nil {
log.Fatalln(err)
}
http.DefaultClient.Timeout = 5 * time.Second
}
func initTepmplates() error {
var err error
templates, err = template.ParseFS(templateBytes, "templates/*.html")
if err != nil {
return err
}
return nil
}
func main() {
http.HandleFunc("/", handleGenres)
http.HandleFunc("/genres", handleGenres)
http.HandleFunc("/getm3u", handleGetM3u)
http.HandleFunc("/stream", handleStream)
err := http.ListenAndServe(config.ListenAddr, nil)
if err != nil {
log.Fatalln(err)
}
}

120
parser.go Normal file
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package main
import (
"bytes"
"fmt"
"net/url"
"strings"
"github.com/PuerkitoBio/goquery"
)
// Genre represents track information
type TrackInfo struct {
Title string
Url string
}
// Genre represents genre information
type Genre struct {
Name string
Code string
}
// Genres holds cached list of available genres
var Genres []Genre
func UpdateGenres() error {
var err error
Genres, err = updateGenreList()
if err != nil {
return fmt.Errorf("get genres list failed: %w", err)
}
return nil
}
func updateGenreList() ([]Genre, error) {
url := "https://promodj.com/music"
doc, err := goquery.NewDocument(url)
if err != nil {
return nil, err
}
var genres []Genre
doc.Find("div.styles_tagcloud > a").Each(func(i int, s *goquery.Selection) {
genres = append(genres, Genre{s.Text(), strings.TrimPrefix(s.AttrOr("href", ""), "/music/")})
})
return genres, nil
}
// tracksByGenre возвращает список треков по указанному жанру
func tracksByGenre(genre string) ([]TrackInfo, error) {
var result []TrackInfo
for i := 1; i <= 50; i++ {
url := fmt.Sprintf("https://promodj.com/music/%s?download=1&page=%d", genre, i)
doc, err := goquery.NewDocument(url)
if err != nil {
return nil, err
}
doc.Find("div.title > a.invert").Each(
func(n int, s *goquery.Selection) {
href, exists := s.Attr("href")
if !exists {
return
}
fields := strings.Split(href, "/")
if len(fields) != 7 {
return
}
fileUrl := fmt.Sprintf("https://promodj.com/download/%s/%s.mp3", fields[5], fields[6])
result = append(result, TrackInfo{s.Text(), fileUrl})
})
}
result = removeDuplicate(result)
return result, nil
}
// tracksToM3u возвращает байты M3U-плейлиста, сгенерированного по указанному
// списку треков
func tracksToM3u(host string, tracks []TrackInfo) []byte {
b := new(bytes.Buffer)
b.Write([]byte{0xEF, 0xBB, 0xBF})
fmt.Fprint(b, "#EXTM3U\n")
for _, track := range tracks {
fmt.Fprintf(b, "#EXTINF:-1,%s\n", track.Title)
u, _ := url.Parse(fmt.Sprintf("https://%s/stream", host))
q := make(url.Values)
q.Add("url", track.Url)
u.RawQuery = q.Encode()
fmt.Fprintf(b, "%s\n", u.String())
}
return b.Bytes()
}
func removeDuplicate(strSlice []TrackInfo) []TrackInfo {
allKeys := make(map[string]bool)
list := []TrackInfo{}
for _, item := range strSlice {
if _, value := allKeys[item.Url]; !value {
allKeys[item.Url] = true
list = append(list, item)
}
}
return list
}

6
promodj.conf Normal file
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ListenAddr = ":80" # addr:port or :port
BufferSize = 128 # encoded file buffer in MiB
Bitrate = 32 # encoded file bitrate in kbit/s
Codec = "libopus" # ffmpeg codec
Format = "opus" # ffmpeg format
ContentType = "audio/ogg" # Content-Type header for served files

43
promodj.service Normal file
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[Unit]
Description=promodj service
After=network-online.target
Wants=network-online.target
[Service]
Type=simple
User=promodj
ExecStart=/usr/bin/promodj
Restart=on-failure
RestartSec=10s
SecureBits=keep-caps
CapabilityBoundingSet=CAP_NET_BIND_SERVICE
AmbientCapabilities=CAP_NET_BIND_SERVICE
DevicePolicy=closed
IPAccounting=true
LockPersonality=true
MemoryDenyWriteExecute=true
NoNewPrivileges=true
PrivateDevices=true
PrivateTmp=true
ProtectClock=true
ProtectControlGroups=true
ProtectControlGroups=true
ProtectHome=true
ProtectHostname=true
ProtectKernelLogs=true
ProtectKernelModules=true
ProtectKernelTunables=true
ProtectSystem=strict
ReadWritePaths=
RemoveIPC=true
RestrictNamespaces=true
RestrictRealtime=true
RestrictSUIDSGID=true
SystemCallArchitectures=native
SystemCallFilter=@system-service
SystemCallFilter=~@resources
UMask=0027
[Install]
WantedBy=multi-user.target

1
promodj.sysusers Normal file
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u promodj - "promodj user"

59
streamer.go Normal file
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@ -0,0 +1,59 @@
package main
import (
"errors"
"fmt"
"io"
"net/http"
"os/exec"
"gopkg.in/djherbis/buffer.v1"
"gopkg.in/djherbis/nio.v2"
)
func stream(url string, w http.ResponseWriter) error {
if url == "" {
err := errors.New("empty url")
http.Error(w, err.Error(), http.StatusBadRequest)
return err
}
w.Header().Set("Content-Type", config.ContentType)
w.Header().Set("Accept-Ranges", "none")
w.WriteHeader(http.StatusOK)
return encode(url, w)
}
func encode(url string, w io.Writer) error {
cmd := exec.Command("ffmpeg",
"-i", url,
"-vn",
"-c:a", config.Codec,
"-b:a", fmt.Sprintf("%dk", config.Bitrate),
"-f", config.Format,
"-ac", "2",
"pipe:1")
out, err := cmd.StdoutPipe()
if err != nil {
return err
}
err = cmd.Start()
if err != nil {
return err
}
go func() {
cmd.Wait()
}()
buf := buffer.New(int64(config.BufferSize) * 1024 * 1024)
_, err = nio.Copy(w, out, buf)
if err != nil {
cmd.Process.Kill()
}
return nil
}

1
templates/genres.html Normal file
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<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"><title>Список жанров</title><style>*{font-family: Verdana;font-size: 16px;color: #444;margin: .5em;padding: 0;}html{margin: 0;padding: 0;height: 100%}body{background-color: #fafafa;display: flex;justify-content: space-between;flex-wrap: nowrap;flex-direction: column;height: 100%;margin: 0;padding: 0;}a{text-decoration: none;color: #07a;}svg, img{vertical-align: middle;width: 1em;height: 1em;}header{background-color: #eee;border-bottom: 1px solid #ddd;padding: .5em;margin: 0;}footer{background-color: #eee;border-top: 1px solid #ddd;padding: .5em;margin: 0;}h1{margin-top: 1em;font-size: 150%;}ul{list-style-type: none;}form{width: calc(100% - 1em);}form > input{width: calc(100% - 2em);padding: .5em;}</style></head><body><header><img src="/favicon.svg">{{.Domain}}</header><main><h1>Список жанров</h1><ul id="genres-list">{{range .Genres}}<li><a href="/getm3u?genre={{.Code}}">{{.Name}}</a></li>{{end}}</ul></main></body></html>