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package main
import ( "bufio" "errors" "fmt" "os" "path" "strconv" )
// Write metadata from Upload struct to file
func metadataWrite(filename string, upload *Upload) error { // Write metadata, overwriting if necessary
file, err := os.Create(path.Join(Config.metaDir, upload.Filename)) if err != nil { return err }
defer file.Close()
w := bufio.NewWriter(file)
fmt.Fprintln(w, upload.Expiry) fmt.Fprintln(w, upload.DeleteKey) fmt.Fprintln(w, upload.DebugInfo)
return w.Flush() }
// Return list of strings from a filename's metadata source
func metadataRead(filename string) ([]string, error) { file, err := os.Create(path.Join(Config.metaDir, filename))
if err != nil { return nil, err }
defer file.Close()
var lines []string scanner := bufio.NewScanner(file) for scanner.Scan() { lines = append(lines, scanner.Text()) }
return lines, scanner.Err() }
func metadataGetExpiry(filename string) (int32, error) { metadata, err := metadataRead(filename)
if len(metadata) < 1 { err := errors.New("ERR: Metadata file does not contain expiry") return 0, err }
// XXX in this case it's up to the caller to determine proper behavior
// for a nonexistant metadata file or broken file
if err != nil { return 0, err }
var expiry int64 expiry, err = strconv.ParseInt(metadata[0], 10, 32)
if err != nil { return 0, err } else { return int32(expiry), err } }
func metadataGetDeleteKey(filename string) (string, error) { metadata, err := metadataRead(filename)
if len(metadata) < 2 { err := errors.New("ERR: Metadata file does not contain deletion key") return "", err }
if err != nil { return "", err } else { return metadata[1], err } }
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