Golang blobref.BlobRef類代碼示例

func (mi *Indexer) GetOwnerClaims(permanode, owner *blobref.BlobRef) (claims search.ClaimList, err os.Error) {
	claims = make(search.ClaimList, 0)

	// TODO: ignore rows where unverified = 'N'
	rs, err := mi.db.Query("SELECT blobref, date, claim, attr, value FROM claims WHERE permanode = ? AND signer = ?",
		permanode.String(), owner.String())
	if err != nil {
		return
	}
	defer rs.Close()

	var row claimsRow
	for rs.Next() {
		err = rs.Scan(&row.blobref, &row.date, &row.claim, &row.attr, &row.value)
		if err != nil {
			return
		}
		t, err := time.Parse(time.RFC3339, trimRFC3339Subseconds(row.date))
		if err != nil {
			log.Printf("Skipping; error parsing time %q: %v", row.date, err)
			continue
		}
		claims = append(claims, &search.Claim{
			BlobRef:   blobref.Parse(row.blobref),
			Signer:    owner,
			Permanode: permanode,
			Type:      row.claim,
			Date:      t,
			Attr:      row.attr,
			Value:     row.value,
		})
	}
	return
}

func (c *FlatHaveCache) NoteBlobExists(br *blobref.BlobRef) {
	c.mu.Lock()
	defer c.mu.Unlock()
	k := br.String()
	c.m[k] = true
	c.dirty[k] = true
}

func (fi *FakeIndex) AddClaim(owner, permanode *blobref.BlobRef, claimType, attr, value string) {
	fi.lk.Lock()
	defer fi.lk.Unlock()
	date := fi.nextDate()

	claim := &search.Claim{
		Permanode: permanode,
		Signer:    nil,
		BlobRef:   nil,
		Date:      date,
		Type:      claimType,
		Attr:      attr,
		Value:     value,
	}
	key := permanode.String() + "/" + owner.String()
	fi.ownerClaims[key] = append(fi.ownerClaims[key], claim)

	if claimType == "set-attribute" && strings.HasPrefix(attr, "camliPath:") {
		suffix := attr[len("camliPath:"):]
		path := &search.Path{
			Target: blobref.MustParse(value),
			Suffix: suffix,
		}
		fi.path[fmt.Sprintf("%s\x00%s\x00%s", owner, permanode, suffix)] = path
	}
}

func (fs *CamliFileSystem) fetchSchemaSuperset(br *blobref.BlobRef) (*schema.Superset, os.Error) {
	blobStr := br.String()
	if ss, ok := fs.blobToSchema.Get(blobStr); ok {
		return ss.(*schema.Superset), nil
	}
	log.Printf("schema cache MISS on %q", blobStr)

	rsc, _, err := fs.fetcher.Fetch(br)
	if err != nil {
		return nil, err
	}
	defer rsc.Close()
	jd := json.NewDecoder(rsc)
	ss := new(schema.Superset)
	err = jd.Decode(ss)
	if err != nil {
		log.Printf("Error parsing %s as schema blob: %v", br, err)
		return nil, os.EINVAL
	}
	if ss.Type == "" {
		log.Printf("blob %s is JSON but lacks camliType", br)
		return nil, os.EINVAL
	}
	ss.BlobRef = br
	fs.blobToSchema.Add(blobStr, ss)
	return ss, nil
}

func (mi *Indexer) PathsLookup(signer, base *blobref.BlobRef, suffix string) (paths []*search.Path, err os.Error) {
	keyId, err := mi.keyIdOfSigner(signer)
	if err != nil {
		return
	}
	rs, err := mi.db.Query("SELECT claimref, claimdate, targetref FROM path "+
		"WHERE keyid=? AND baseref=? AND suffix=?",
		keyId, base.String(), suffix)
	if err != nil {
		return
	}
	defer rs.Close()

	var claimref, claimdate, targetref string
	for rs.Next() {
		if err = rs.Scan(&claimref, &claimdate, &targetref); err != nil {
			return
		}
		t, err := time.Parse(time.RFC3339, trimRFC3339Subseconds(claimdate))
		if err != nil {
			log.Printf("Skipping bogus path row with bad time: %q", claimref)
			continue
		}
		_ = t // TODO: use this?
		paths = append(paths, &search.Path{
			Claim:     blobref.Parse(claimref),
			ClaimDate: claimdate,
			Base:      base,
			Target:    blobref.Parse(targetref),
			Suffix:    suffix,
		})
	}
	return
}

// Given a blobref and a few hex characters of the digest of the next hop, return the complete
// blobref of the prefix, if that's a valid next hop.
func (sh *Handler) ResolvePrefixHop(parent *blobref.BlobRef, prefix string) (child *blobref.BlobRef, err os.Error) {
	// TODO: this is a linear scan right now. this should be
	// optimized to use a new database table of members so this is
	// a quick lookup.  in the meantime it should be in memcached
	// at least.
	if len(prefix) < 8 {
		return nil, fmt.Errorf("Member prefix %q too small", prefix)
	}
	dr := sh.NewDescribeRequest()
	dr.Describe(parent, 1)
	res, err := dr.Result()
	if err != nil {
		return
	}
	des, ok := res[parent.String()]
	if !ok {
		return nil, fmt.Errorf("Failed to describe member %q in parent %q", prefix, parent)
	}
	if des.Permanode != nil {
		if cr, ok := des.ContentRef(); ok && strings.HasPrefix(cr.Digest(), prefix) {
			return cr, nil
		}
		for _, member := range des.Members() {
			if strings.HasPrefix(member.BlobRef.Digest(), prefix) {
				return member.BlobRef, nil
			}
		}
	}
	return nil, fmt.Errorf("Member prefix %q not found in %q", prefix, parent)
}

func (ds *DiskStorage) blobDirectory(partition string, b *blobref.BlobRef) string {
	d := b.Digest()
	if len(d) < 6 {
		d = d + "______"
	}
	return filepath.Join(ds.PartitionRoot(partition), b.HashName(), d[0:3], d[3:6])
}

func NewClaim(permaNode *blobref.BlobRef, claimType string) map[string]interface{} {
	m := newCamliMap(1, "claim")
	m["permaNode"] = permaNode.String()
	m["claimType"] = claimType
	m["claimDate"] = RFC3339FromNanos(time.Nanoseconds())
	return m
}

func (mi *Indexer) ExistingFileSchemas(bytesRef *blobref.BlobRef) (files []*blobref.BlobRef, err os.Error) {
	client, err := mi.getConnection()
	if err != nil {
		return
	}
	defer func() {
		if err == nil {
			mi.releaseConnection(client)
		} else {
			client.Close()
		}
	}()

	err = client.Query(fmt.Sprintf("SELECT fileschemaref FROM files WHERE bytesref=%q", bytesRef.String()))
	if err != nil {
		return
	}

	result, err := client.StoreResult()
	if err != nil {
		return
	}
	defer client.FreeResult()

	for {
		row := result.FetchRow()
		if row == nil {
			break
		}
		files = append(files, blobref.Parse(row[0].(string)))
	}
	return
}

func (mi *Indexer) GetBlobMimeType(blob *blobref.BlobRef) (mime string, size int64, err os.Error) {
	client, err := mi.getConnection()
	if err != nil {
		return
	}
	defer func() {
		if err == nil || err == os.ENOENT {
			mi.releaseConnection(client)
		} else {
			client.Close()
		}
	}()

	err = client.Query(fmt.Sprintf("SELECT type, size FROM blobs WHERE blobref=%q", blob.String()))
	if err != nil {
		return
	}

	result, err := client.StoreResult()
	if err != nil {
		return
	}
	defer client.FreeResult()

	row := result.FetchRow()
	if row == nil {
		err = os.ENOENT
		return
	}

	//log.Printf("got row: %#v (2 is %T)", row, row[1])
	mime, _ = row[0].(string)
	size, _ = row[1].(int64)
	return
}

func (mi *Indexer) populatePermanode(client *mysql.Client, blobRef *blobref.BlobRef, camli *schema.Superset) (err os.Error) {
	err = execSQL(client,
		"INSERT IGNORE INTO permanodes (blobref, unverified, signer, lastmod) "+
			"VALUES (?, 'Y', ?, '')",
		blobRef.String(), camli.Signer)
	return
}

func (h *SimpleBlobHub) NotifyBlobReceived(blob *blobref.BlobRef) {
	h.l.Lock()
	defer h.l.Unlock()

	// Callback channels to notify, nil until non-empty
	var notify []chan *blobref.BlobRef

	// Append global listeners
	for ch, _ := range h.listeners {
		notify = append(notify, ch)
	}

	// Append blob-specific listeners
	if h.blobListeners != nil {
		blobstr := blob.String()
		if set, ok := h.blobListeners[blobstr]; ok {
			for ch, _ := range set {
				notify = append(notify, ch)
			}
		}
	}

	// Run in a separate Goroutine so NotifyBlobReceived doesn't block
	// callers if callbacks are slow.
	go func() {
		for _, ch := range notify {
			ch <- blob
		}
	}()
}

func NewShareRef(authType string, target *blobref.BlobRef, transitive bool) map[string]interface{} {
	m := newCamliMap(1, "share")
	m["authType"] = authType
	m["target"] = target.String()
	m["transitive"] = transitive
	return m
}

func (mi *Indexer) populatePermanode(blobRef *blobref.BlobRef, camli *schema.Superset) (err os.Error) {
	err = mi.db.Execute(
		"INSERT IGNORE INTO permanodes (blobref, unverified, signer, lastmod) "+
			"VALUES (?, 'Y', ?, '') "+
			"ON DUPLICATE KEY UPDATE unverified = 'Y', signer = ?",
		blobRef.String(), camli.Signer, camli.Signer)
	return
}

func (dr *DescribeRequest) DescribeSync(br *blobref.BlobRef) (*DescribedBlob, os.Error) {
	dr.Describe(br, 1)
	res, err := dr.Result()
	if err != nil {
		return nil, err
	}
	return res[br.String()], nil
}