92 lines
2.8 KiB
Go
92 lines
2.8 KiB
Go
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package player
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import (
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"fmt"
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"os"
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"os/exec"
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"runtime"
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"strings"
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)
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// Player abstracts execution of a media player for a stream URL.
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// Implementations may use exec (legacy) or IPC (preferred for mpv).
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type Player interface {
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// Play starts playback of the given URL. For long-running players this blocks
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// until the player exits (or returns immediately for background/IPC impls).
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Play(url string, extraArgs ...string) error
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Stop() error // best effort
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}
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// IsInstalled reports whether the named executable is on PATH.
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// Fixed to avoid shell injection (no "/bin/sh -c 'command -v ' + name").
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func IsInstalled(name string) bool {
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if name == "" {
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return false
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}
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// Direct lookpath is best; fall back to exec the name with a harmless arg.
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if _, err := exec.LookPath(name); err == nil {
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return true
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}
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// Some players may be scripts without direct lookpath in certain envs; try exec --version like.
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cmd := exec.Command(name, "--version")
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_ = cmd.Run() // ignore output/err; if it started at all, likely present
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// More reliable: use LookPath on common variants? For now LookPath is primary.
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return false
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}
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// NewLegacy returns a simple exec-based player (stdio inheritance for interactive controls).
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// This is the cleaned version of the old subExecute pattern.
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func NewLegacy(program string, baseArgs ...string) Player {
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return &legacyPlayer{program: program, baseArgs: baseArgs}
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}
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type legacyPlayer struct {
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program string
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baseArgs []string
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cmd *exec.Cmd
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}
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func (p *legacyPlayer) Play(url string, extra ...string) error {
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args := append([]string{}, p.baseArgs...)
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args = append(args, extra...)
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args = append(args, url)
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p.cmd = exec.Command(p.program, args...)
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p.cmd.Stdin = os.Stdin
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p.cmd.Stdout = os.Stdout
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p.cmd.Stderr = os.Stderr
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if err := p.cmd.Run(); err != nil {
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// For interactive players the err is often just "exit status N" from 'q'.
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// Surface it but don't treat as fatal for the app.
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fmt.Printf("(player exited: %v)\n", err)
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}
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return nil // we intentionally do not try CombinedOutput after Run
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}
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func (p *legacyPlayer) Stop() error {
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if p.cmd != nil && p.cmd.Process != nil {
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_ = p.cmd.Process.Kill()
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}
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return nil
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}
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// isShellMeta reports if name looks like it contains shell metachars (defense in depth).
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func isShellMeta(name string) bool {
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return strings.ContainsAny(name, ";|&`$(){}[]<>\n\r\t ")
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}
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// isInstalledLegacy is the old body (kept only for reference / windows where.exe).
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// New code should use the top-level IsInstalled.
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func isInstalledLegacy(name string) bool {
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if runtime.GOOS == "windows" {
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cmd := exec.Command("where.exe", name)
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return cmd.Run() == nil
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}
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if isShellMeta(name) {
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return false // refuse obviously bad names
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}
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cmd := exec.Command("/bin/sh", "-c", "command -v "+name) // still used on some old paths; prefer LookPath above
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return cmd.Run() == nil
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}
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