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