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Bind audio cache reuse to remote identity

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This commit is contained in:
Eric Rakestraw
2026-08-10 21:09:21 +00:00
parent 8375ad83f3
commit d9fa1d9328
9 changed files with 414 additions and 58 deletions
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37
internal/audio/s3_audio.go
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@@ -51,19 +51,15 @@ func MaterializeS3Audio(ctx context.Context, req S3MaterializeRequest) (S3Materi
}
result := S3MaterializeResult{}
if req.CacheEnabled {
if req.CacheEnabled && cacheIdentityEligible(req) {
cachePath, err := artifacts.S3AudioCachePath(req.CacheRoot, req.Bucket, key)
if err != nil {
return S3MaterializeResult{}, fmt.Errorf("resolve audio cache path: %w", err)
}
result.CachePath = cachePath
if ok, err := validCachedAudio(cachePath, req.Object.Size); err != nil {
if checksum, ok, err := materializeVerifiedCachedAudio(ctx, req, cachePath); err != nil {
return S3MaterializeResult{}, err
} else if ok {
checksum, err := fileops.CopyFileAtomicWithChecksum(cachePath, req.DestPath, fileops.WorkspaceFileMode)
if err != nil {
return S3MaterializeResult{}, fmt.Errorf("materialize cached audio %q: %w", cachePath, err)
}
result.Checksum = checksum
result.CacheHit = true
return result, nil
@@ -90,34 +86,21 @@ func MaterializeS3Audio(ctx context.Context, req S3MaterializeRequest) (S3Materi
result.Downloaded = true
if result.CachePath != "" {
if _, err := fileops.CopyFileAtomicWithChecksum(spoolPath, result.CachePath, fileops.WorkspaceFileMode); err != nil {
cacheChecksum, err := fileops.CopyFileAtomicWithChecksum(spoolPath, result.CachePath, fileops.WorkspaceFileMode)
if err != nil {
return S3MaterializeResult{}, fmt.Errorf("populate audio cache %q: %w", result.CachePath, err)
}
if cacheChecksum != result.Checksum {
return S3MaterializeResult{}, fmt.Errorf("audio cache checksum differs from downloaded audio")
}
if err := writeAudioCacheIdentity(cacheIdentityPath(result.CachePath), cacheIdentityForRequest(req, cacheChecksum)); err != nil {
return S3MaterializeResult{}, err
}
}
return result, nil
}
func validCachedAudio(path string, expectedSize int64) (bool, error) {
info, err := os.Stat(path)
if err != nil {
if os.IsNotExist(err) {
return false, nil
}
return false, fmt.Errorf("stat cached audio %q: %w", path, err)
}
if info.IsDir() {
return false, fmt.Errorf("cached audio path is a directory: %q", path)
}
if info.Size() <= 0 {
return false, nil
}
if expectedSize > 0 && info.Size() != expectedSize {
return false, nil
}
return true, nil
}
func validateLocalAudio(path string, expectedSize int64) error {
info, err := os.Stat(path)
if err != nil {