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swift: Support sub container paths

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This commit is contained in:
Nick Craig-Wood 2014-05-05 17:30:55 +01:00
parent 580fa3a5a7
commit d0ca58bbb1
1 changed files with 100 additions and 46 deletions
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98
swift/swift.go
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@ -1,13 +1,10 @@
// Swift interface
package swift
// FIXME need to prevent anything but ListDir working for swift://
import (
"errors"
"fmt"
"io"
"log"
"regexp"
"strings"
"time"
@ -73,8 +70,11 @@ type FsObjectSwift struct {
// String converts this FsSwift to a string
func (f *FsSwift) String() string {
if f.root == "" {
return fmt.Sprintf("Swift container %s", f.container)
}
return fmt.Sprintf("Swift container %s path %s", f.container, f.root)
}
// Pattern to match a swift path
var matcher = regexp.MustCompile(`^([^/]*)(.*)$`)
@ -123,14 +123,19 @@ func NewFs(name, path string) (fs.Fs, error) {
if err != nil {
return nil, err
}
if directory != "" {
return nil, fmt.Errorf("Directories not supported yet in %q", path)
}
c, err := swiftConnection(name)
if err != nil {
return nil, err
}
f := &FsSwift{c: *c, container: container, root: directory}
// FIXME - check if it is a file before doing this and make a limited fs
if directory != "" {
directory += "/"
}
f := &FsSwift{
c: *c,
container: container,
root: directory,
}
return f, nil
}
@ -162,41 +167,77 @@ func (f *FsSwift) NewFsObject(remote string) fs.Object {
return f.NewFsObjectWithInfo(remote, nil)
}
// Walk the path returning a channel of FsObjects
func (f *FsSwift) List() fs.ObjectsChan {
out := make(fs.ObjectsChan, fs.Config.Checkers)
go func() {
// FIXME use a smaller limit?
err := f.c.ObjectsWalk(f.container, nil, func(opts *swift.ObjectsOpts) (interface{}, error) {
// list the objects into the function supplied
//
// If directories is set it only sends directories
func (f *FsSwift) list(directories bool, fn func(string, *swift.Object)) {
// Options for ObjectsWalk
opts := swift.ObjectsOpts{
Prefix: f.root,
Limit: 256,
}
if directories {
opts.Delimiter = '/'
}
rootLength := len(f.root)
err := f.c.ObjectsWalk(f.container, &opts, func(opts *swift.ObjectsOpts) (interface{}, error) {
objects, err := f.c.Objects(f.container, opts)
if err == nil {
for i := range objects {
object := &objects[i]
if fs := f.NewFsObjectWithInfo(object.Name, object); fs != nil {
out <- fs
// FIXME if there are no directories, swift gives back the files for some reason!
if directories && !strings.HasSuffix(object.Name, "/") {
continue
}
if !strings.HasPrefix(object.Name, f.root) {
fs.Log(f, "Odd name received %q", object.Name)
continue
}
remote := object.Name[rootLength:]
fn(remote, object)
}
}
return objects, err
})
if err != nil {
fs.Stats.Error()
log.Printf("Couldn't read container %q: %s", f.container, err)
fs.Log(f, "Couldn't read container %q: %s", f.container, err)
}
}
// Walk the path returning a channel of FsObjects
func (f *FsSwift) List() fs.ObjectsChan {
out := make(fs.ObjectsChan, fs.Config.Checkers)
if f.container == "" {
// Return no objects at top level list
close(out)
fs.Stats.Error()
fs.Log(f, "Can't list objects at root - choose a container using lsd")
} else {
// List the objects
go func() {
defer close(out)
f.list(false, func(remote string, object *swift.Object) {
if fs := f.NewFsObjectWithInfo(remote, object); fs != nil {
out <- fs
}
})
}()
}
return out
}
// Lists the containers
func (f *FsSwift) ListDir() fs.DirChan {
out := make(fs.DirChan, fs.Config.Checkers)
if f.container == "" {
// List the containers
go func() {
defer close(out)
containers, err := f.c.ContainersAll(nil)
if err != nil {
fs.Stats.Error()
log.Printf("Couldn't list containers: %s", err)
fs.Log(f, "Couldn't list containers: %v", err)
} else {
for _, container := range containers {
out <- &fs.Dir{
@ -207,6 +248,19 @@ func (f *FsSwift) ListDir() fs.DirChan {
}
}
}()
} else {
// List the directories in the path in the container
go func() {
defer close(out)
f.list(true, func(remote string, object *swift.Object) {
out <- &fs.Dir{
Name: remote,
Bytes: object.Bytes,
Count: 0,
}
})
}()
}
return out
}
@ -275,7 +329,7 @@ func (o *FsObjectSwift) readMetaData() (err error) {
if o.meta != nil {
return nil
}
info, h, err := o.swift.c.Object(o.swift.container, o.remote)
info, h, err := o.swift.c.Object(o.swift.container, o.swift.root+o.remote)
if err != nil {
fs.Debug(o, "Failed to read info: %s", err)
return err
@ -314,7 +368,7 @@ func (o *FsObjectSwift) SetModTime(modTime time.Time) {
return
}
o.meta.SetModTime(modTime)
err = o.swift.c.ObjectUpdate(o.swift.container, o.remote, o.meta.ObjectHeaders())
err = o.swift.c.ObjectUpdate(o.swift.container, o.swift.root+o.remote, o.meta.ObjectHeaders())
if err != nil {
fs.Stats.Error()
fs.Log(o, "Failed to update remote mtime: %s", err)
@ -328,7 +382,7 @@ func (o *FsObjectSwift) Storable() bool {
// Open an object for read
func (o *FsObjectSwift) Open() (in io.ReadCloser, err error) {
in, _, err = o.swift.c.ObjectOpen(o.swift.container, o.remote, true, nil)
in, _, err = o.swift.c.ObjectOpen(o.swift.container, o.swift.root+o.remote, true, nil)
return
}
@ -339,13 +393,13 @@ func (o *FsObjectSwift) Update(in io.Reader, modTime time.Time, size int64) erro
// Set the mtime
m := swift.Metadata{}
m.SetModTime(modTime)
_, err := o.swift.c.ObjectPut(o.swift.container, o.remote, in, true, "", "", m.ObjectHeaders())
_, err := o.swift.c.ObjectPut(o.swift.container, o.swift.root+o.remote, in, true, "", "", m.ObjectHeaders())
return err
}
// Remove an object
func (o *FsObjectSwift) Remove() error {
return o.swift.c.ObjectDelete(o.swift.container, o.remote)
return o.swift.c.ObjectDelete(o.swift.container, o.swift.root+o.remote)
}
// Check the interfaces are satisfied