e332c0a6e4
Complete usenet download support for unarr CLI: - NZB XML parser with password extraction from <head> meta - yEnc decoder with CRC32 verification - NNTP client with TLS, auth, and connection pool (up to 10 conns) - Segment downloader with parallel workers and progress reporting - Post-processing: par2 verify/repair, unrar/7z extraction with password support - Agent client methods: SearchNzbs, DownloadNzb, GetUsenetCredentials - UsenetDownloader implementing full Downloader interface - Daemon wiring: UsenetDownloader passed to Manager E2E tested: Oppenheimer 1080p (2.94 GB) downloaded via NNTP in 77.6s.
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
package postprocess
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import (
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"fmt"
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"log"
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"os/exec"
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"strings"
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)
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// Par2Available checks if par2cmdline is installed.
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func Par2Available() bool {
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_, err := exec.LookPath("par2")
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return err == nil
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}
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// Par2Verify verifies files using a par2 file.
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// Returns nil if verification passes, error otherwise.
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func Par2Verify(par2File string) error {
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if !Par2Available() {
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log.Printf("[usenet] par2 not installed, skipping verification")
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return nil
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}
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cmd := exec.Command("par2", "verify", par2File)
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output, err := cmd.CombinedOutput()
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if err != nil {
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outStr := string(output)
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// Check if repair is possible
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if strings.Contains(outStr, "Repair is possible") {
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return &Par2RepairableError{Par2File: par2File}
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}
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if strings.Contains(outStr, "Repair is not possible") {
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return fmt.Errorf("par2: verification failed and repair not possible:\n%s", outStr)
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}
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return fmt.Errorf("par2 verify: %w\n%s", err, outStr)
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}
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log.Printf("[usenet] par2: verification OK")
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return nil
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}
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// Par2Repair attempts to repair files using par2 parity data.
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func Par2Repair(par2File string) error {
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if !Par2Available() {
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return fmt.Errorf("par2 not installed")
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}
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cmd := exec.Command("par2", "repair", par2File)
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output, err := cmd.CombinedOutput()
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if err != nil {
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return fmt.Errorf("par2 repair: %w\n%s", err, output)
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}
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log.Printf("[usenet] par2: repair successful")
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return nil
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}
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// Par2RepairableError indicates verification failed but repair is possible.
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type Par2RepairableError struct {
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Par2File string
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}
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func (e *Par2RepairableError) Error() string {
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return fmt.Sprintf("par2: verification failed, repair possible: %s", e.Par2File)
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}
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