53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package remote
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import (
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"context"
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"fmt"
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"net/http"
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"sync"
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)
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var (
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storagesMu sync.RWMutex
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storages = make(map[string]Storage)
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)
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type Storage interface {
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NewStorage(ctx context.Context, connString string) (Storage, error)
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// Create(name string) (http.File, error)
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Open(name string) (http.File, error)
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// OpenFile(name string, flag int, fileMode os.FileMode) (http.File, error)
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// Remove(name string) error
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// RemoveAll(path string) error
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// Rename(oldName, newName string) error
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// Stat(name string) (os.FileInfo, error)
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}
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// NewStorage returns a new remote storage instance.
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func NewStorage(ctx context.Context, connString string) (Storage, error) {
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scheme, err := schemeFromURL(connString)
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if err != nil {
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return nil, err
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}
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storagesMu.RLock()
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s, ok := storages[scheme]
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storagesMu.RUnlock()
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if !ok {
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return nil, fmt.Errorf("unknown storage %v (forgotten import?)", scheme)
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}
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return s.NewStorage(ctx, connString)
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}
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// Register globally registers a storage
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func Register(name string, storage Storage) {
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storagesMu.Lock()
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defer storagesMu.Unlock()
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if storage == nil {
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panic("Register storage is nil")
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}
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if _, exists := storages[name]; exists {
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panic("Register called twice for storage " + name)
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}
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storages[name] = storage
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}
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