added blobstore and capability packages

server/blobstore/blobsql/blobstore.go

@@ -0,0 +1,55 @@
+package blobsql
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+
+	"github.com/russross/meddler"
+)
+
+type Blobstore struct {
+	meddler.DB
+}
+
+// Del removes an object from the blobstore.
+func (b *Blobstore) Del(path string) error {
+	var _, err = b.Exec(deleteBlob, path)
+	return err
+}
+
+// Get retrieves an object from the blobstore.
+func (b *Blobstore) Get(path string) ([]byte, error) {
+	var blob = Blob{}
+	var err = meddler.QueryRow(b, &blob, queryBlob, path)
+	return []byte(blob.Data), err
+}
+
+// GetReader retrieves an object from the blobstore.
+// It is the caller's responsibility to call Close on
+// the ReadCloser when finished reading.
+func (b *Blobstore) GetReader(path string) (io.ReadCloser, error) {
+	var blob, err = b.Get(path)
+	var buf = bytes.NewBuffer(blob)
+	return ioutil.NopCloser(buf), err
+}
+
+// Put inserts an object into the blobstore.
+func (b *Blobstore) Put(path string, data []byte) error {
+	var blob = Blob{}
+	meddler.QueryRow(b, &blob, queryBlob, path)
+	blob.Path = path
+	blob.Data = string(data)
+	return meddler.Save(b, tableBlob, &blob)
+}
+
+// PutReader inserts an object into the blobstore by
+// consuming data from r until EOF.
+func (b *Blobstore) PutReader(path string, r io.Reader) error {
+	var data, _ = ioutil.ReadAll(r)
+	return b.Put(path, data)
+}
+
+func New(db meddler.DB) *Blobstore {
+	return &Blobstore{db}
+}