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103 lines
3.6 KiB
103 lines
3.6 KiB
package filer
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import (
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"context"
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"github.com/chrislusf/seaweedfs/weed/util"
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"math"
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"path/filepath"
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"strings"
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)
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func splitPattern(pattern string) (prefix string, restPattern string) {
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position := strings.Index(pattern, "*")
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if position >= 0 {
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return pattern[:position], pattern[position:]
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}
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position = strings.Index(pattern, "?")
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if position >= 0 {
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return pattern[:position], pattern[position:]
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}
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return "", restPattern
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}
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// For now, prefix and namePattern are mutually exclusive
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func (f *Filer) ListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int64, prefix string, namePattern string, namePatternExclude string) (entries []*Entry, hasMore bool, err error) {
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if limit > math.MaxInt32-1 {
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limit = math.MaxInt32 - 1
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}
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_, err = f.StreamListDirectoryEntries(ctx, p, startFileName, inclusive, limit+1, prefix, namePattern, namePatternExclude, func(entry *Entry) bool {
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entries = append(entries, entry)
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return true
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})
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hasMore = int64(len(entries)) >= limit+1
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if hasMore {
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entries = entries[:limit]
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}
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return entries, hasMore, err
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}
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// For now, prefix and namePattern are mutually exclusive
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func (f *Filer) StreamListDirectoryEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int64, prefix string, namePattern string, namePatternExclude string, eachEntryFunc ListEachEntryFunc) (lastFileName string, err error) {
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if strings.HasSuffix(string(p), "/") && len(p) > 1 {
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p = p[0 : len(p)-1]
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}
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prefixInNamePattern, restNamePattern := splitPattern(namePattern)
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if prefixInNamePattern != "" {
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prefix = prefixInNamePattern
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}
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var missedCount int64
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missedCount, lastFileName, err = f.doListPatternMatchedEntries(ctx, p, startFileName, inclusive, limit, prefix, restNamePattern, namePatternExclude, eachEntryFunc)
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for missedCount > 0 && err == nil {
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missedCount, lastFileName, err = f.doListPatternMatchedEntries(ctx, p, lastFileName, false, missedCount, prefix, restNamePattern, namePatternExclude, eachEntryFunc)
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}
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return
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}
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func (f *Filer) doListPatternMatchedEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int64, prefix, restNamePattern string, namePatternExclude string, eachEntryFunc ListEachEntryFunc) (missedCount int64, lastFileName string, err error) {
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if len(restNamePattern) == 0 && len(namePatternExclude) == 0 {
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lastFileName, err = f.doListValidEntries(ctx, p, startFileName, inclusive, limit, prefix, eachEntryFunc)
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return 0, lastFileName, err
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}
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lastFileName, err = f.doListValidEntries(ctx, p, startFileName, inclusive, limit, prefix, func(entry *Entry) bool {
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nameToTest := entry.Name()
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if len(namePatternExclude) > 0 {
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if matched, matchErr := filepath.Match(namePatternExclude, nameToTest); matchErr == nil && matched {
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missedCount++
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return true
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}
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}
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if len(restNamePattern) > 0 {
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if matched, matchErr := filepath.Match(restNamePattern, nameToTest[len(prefix):]); matchErr == nil && !matched {
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missedCount++
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return true
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}
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}
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if !eachEntryFunc(entry) {
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return false
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}
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return true
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})
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if err != nil {
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return
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}
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return
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}
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func (f *Filer) doListValidEntries(ctx context.Context, p util.FullPath, startFileName string, inclusive bool, limit int64, prefix string, eachEntryFunc ListEachEntryFunc) (lastFileName string, err error) {
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var expiredCount int64
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expiredCount, lastFileName, err = f.doListDirectoryEntries(ctx, p, startFileName, inclusive, limit, prefix, eachEntryFunc)
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for expiredCount > 0 && err == nil {
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expiredCount, lastFileName, err = f.doListDirectoryEntries(ctx, p, lastFileName, false, expiredCount, prefix, eachEntryFunc)
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}
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return
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}
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