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package filer
import ( "context" "github.com/chrislusf/seaweedfs/weed/util" "path/filepath" "strings" )
func splitPattern(pattern string) (prefix string, restPattern string) { position := strings.Index(pattern, "*") if position >= 0 { return pattern[:position], pattern[position:] } position = strings.Index(pattern, "?") if position >= 0 { return pattern[:position], pattern[position:] } return "", restPattern }
// For now, prefix and namePattern are mutually exclusive
func (f *Filer) ListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int, prefix string, namePattern string) (entries []*Entry, err error) { if strings.HasSuffix(string(p), "/") && len(p) > 1 { p = p[0 : len(p)-1] }
prefixInNamePattern, restNamePattern := splitPattern(namePattern) if prefixInNamePattern != "" { prefix = prefixInNamePattern } var missedCount int var lastFileName string
entries, missedCount, lastFileName, err = f.doListPatternMatchedEntries(ctx, p, startFileName, inclusive, limit, prefix, restNamePattern)
for missedCount > 0 && err == nil { var makeupEntries []*Entry makeupEntries, missedCount, lastFileName, err = f.doListPatternMatchedEntries(ctx, p, lastFileName, false, missedCount, prefix, restNamePattern) for _, entry := range makeupEntries { entries = append(entries, entry) } }
return entries, err }
func (f *Filer) doListPatternMatchedEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int, prefix, restNamePattern string) (matchedEntries []*Entry, missedCount int, lastFileName string, err error) { var foundEntries []*Entry
foundEntries, lastFileName, err = f.doListValidEntries(ctx, p, startFileName, inclusive, limit, prefix) if err != nil { return } if len(restNamePattern) == 0 { return foundEntries, 0, lastFileName, nil } for _, entry := range foundEntries { nameToTest := strings.ToLower(entry.Name()) if matched, matchErr := filepath.Match(restNamePattern, nameToTest[len(prefix):]); matchErr == nil && matched { matchedEntries = append(matchedEntries, entry) } else { missedCount++ } } return }
func (f *Filer) doListValidEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int, prefix string) (entries []*Entry, lastFileName string, err error) { var makeupEntries []*Entry var expiredCount int entries, expiredCount, lastFileName, err = f.doListDirectoryEntries(ctx, p, startFileName, inclusive, limit, prefix) for expiredCount > 0 && err == nil { makeupEntries, expiredCount, lastFileName, err = f.doListDirectoryEntries(ctx, p, lastFileName, false, expiredCount, prefix) if err == nil { entries = append(entries, makeupEntries...) } } return }
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