コード例 #1
0
ファイル: vfs.go プロジェクト: Christopheraburns/clive
func (t *Fs) Get(rid string, off, count int64, pred string) <-chan []byte {
	t.dprintf("get %s %d %d %q\n", rid, off, count, pred)
	cs := t.IOstats.NewCall(zx.Sget)
	c := make(chan []byte)
	go func() {
		var d zx.Dir
		f, err := t.walk(rid)
		if f == nil && err == nil {	// Ctl
			d = ctldir.Dup()
		} else if err == nil {
			d, err = t.statf(f, rid)
		}
		if err == nil && !t.NoPermCheck {
			if !d.CanRead(t.ai) {
				err = fmt.Errorf("%s: %s", rid, dbg.ErrPerm)
			}
		}
		if err == nil && pred != "" {
			err = t.match(d, err, rid, pred)
		}
		if err == nil {
			if d["path"] == "/Ctl" {
				err = t.getCtl(off, count, c)
			} else if d["type"] != "d" {
				if gf, ok := f.(Getter); ok {
					err = gf.Get(off, count, c)
				}
			} else {
				err = t.getdir(f, d, off, count, c)
			}
		}
		cs.End(err != nil)
		if err != nil {
			t.dprintf("get %s: %s\n", rid, err)
		} else {
			t.dprintf("get %s: ok\n", rid)
		}
		close(c, err)
	}()
	return c
}
コード例 #2
0
ファイル: vfs.go プロジェクト: Christopheraburns/clive
// d is a dup and can be changed.
func (t *Fs) find(f File, d zx.Dir, p *pred.Pred, spref, dpref string, lvl int,
	c chan<- zx.Dir, ai *auth.Info) {
	match, pruned, err := p.EvalAt(d, lvl)
	t.dprintf("find  at %v\n\t%v\n\t%v %v %v\n\n", d, p, match, pruned, err)
	if pruned {
		if !match {
			d["err"] = "pruned"
		}
		c <- d
		return
	}
	if d["type"] == "d" && err == nil {
		if !t.NoPermCheck && !d.CanWalk(ai) {
			err = dbg.ErrPerm
		}
	}
	if err != nil {
		d["err"] = err.Error()
		c <-d
		return
	}
	if d["rm"] != "" {
		return
	}
	if match {
		if ok := c <- d; !ok {
			return
		}
	}
	if d["type"] != "d" || f == nil {
		return
	}
	wf, ok := f.(Walker)
	if !ok {
		return
	}
	ns, err := wf.Getdir()
	if err != nil {
		return
	}
	sort.Sort(sort.StringSlice(ns))
	if d["name"] == "/" {
		cd := ctldir.Dup()
		if spref != dpref {
			cpath := cd["path"]
			suff := zx.Suffix(cpath, spref)
			cd["path"] = zx.Path(dpref, suff)
		}
		t.find(nil, cd, p, spref, dpref, lvl+1, c, ai)
	}
	for _, cnm := range ns {
		cf, err := wf.Walk(cnm)
		if err != nil {
			continue
		}
		cp := zx.Path(d["path"], cnm)
		cd, err := t.statf(cf, cp)
		if err != nil || cd["rm"] != "" {
			continue
		}
		cd = cd.Dup()
		if spref != dpref {
			cpath := cd["path"]
			suff := zx.Suffix(cpath, spref)
			cd["path"] = zx.Path(dpref, suff)
		}
		t.find(cf, cd, p, spref, dpref, lvl+1, c, ai)
	}
}

func (t *Fs) Find(rid, fpred, spref, dpref string, depth int) <-chan zx.Dir {
	t.dprintf("find %s '%s' '%s' '%s' %d\n", rid, fpred, spref, dpref, depth)
	cs := t.IOstats.NewCall(zx.Sfind)
	dc := make(chan zx.Dir)
	go func() {
		rid, err := zx.AbsPath(rid)
		if err != nil {
			cs.End(err != nil)
			t.dprintf("find %s: %s\n", rid, err)
			close(dc, err)
			return
		}
		f, err := t.walk(rid)
		if err != nil {
			cs.End(err != nil)
			t.dprintf("find %s: %s\n", rid, err)
			close(dc, err)
			return
		}
		p, err := pred.New(fpred)
		if err != nil {
			cs.End(err != nil)
			t.dprintf("find %s: %s\n", rid, err)
			close(dc, err)
			return
		}
		d, err := t.statf(f, rid)
		if err != nil {
			cs.End(err != nil)
			t.dprintf("find %s: %s\n", rid, err)
			close(dc, err)
			return
		}
		d = d.Dup()
		if spref != dpref {
			suff := zx.Suffix(rid, spref)
			d["path"] = zx.Path(dpref, suff)
		}
		t.find(f, d, p, spref, dpref, depth, dc, t.ai)
		cs.End(err != nil)
		t.dprintf("find %s: ok\n", rid)
		close(dc)
	}()
	return dc
}

// used only by findget
func (t *Fs) get(rid string, datac chan<- []byte) error {
	f, err := t.walk(rid)
	if err != nil {
		return err
	}
	gf, ok := f.(Getter)
	if !ok {
		return nil
	}
	return gf.Get(0, -1, datac)
}

func (t *Fs) FindGet(rid, fpred, spref, dpref string, depth int) <-chan zx.DirData {
	t.dprintf("findget %s '%s' '%s' '%s' %d\n", rid, fpred, spref, dpref, depth)
	gc := make(chan zx.DirData)
	cs := t.IOstats.NewCall(zx.Sfindget)
	go func() {
		dc := t.Find(rid, fpred, spref, dpref, depth) // BUG: will stat a Sfind
		for d := range dc {
			g := zx.DirData{Dir: d}
			var datac chan []byte
			if d["err"] == "" && !t.NoPermCheck &&
				d["type"] != "d" && !d.CanRead(t.ai) {
				d["err"] = dbg.ErrPerm.Error()
				
			}
			if d["err"]=="" && d["type"]!="d" {
				datac = make(chan []byte)
				g.Datac = datac
			}
			if ok := gc <- g; !ok {
				close(dc, cerror(gc))
				break
			}
			if datac != nil {
				err := t.get(d["spath"], datac)
				close(datac, err)
			}
		}
		err := cerror(dc)
		cs.End(err != nil)
		if err != nil {
			t.dprintf("find %s: %s\n", rid, err)
		} else {
			t.dprintf("find %s: ok\n", rid)
		}
		close(gc, err)
	}()
	return gc
}