fix big data storage problem

src/jio.storage/indexeddbstorage.js

@@ -595,22 +595,15 @@
       transaction,
       global_db,
       BlobInfo,
-      digest,
       readResult;
-    new RSVP.Queue()
-            .push(jIO.util.readBlobAsText(metadata._blob).
-        then(function (e) {
-          digest = jIO.util.makeBinaryStringDigest(e.target.result);     //xxx
-          readResult = e.target.result;
+    jIO.util.readBlobAsArrayBuffer(metadata._blob)
+      .then(function (event) {
+        readResult = event.target.result;
         BlobInfo = {
           "content_type": metadata._blob.type,
-            "digest": digest,
           "length": metadata._blob.size
         };
-        }, function () {
-          command.error("conflict", "broken blob",
-            "Cannot read data to put");
-        }))
+        new RSVP.Queue()
             .push(function () {
             return openIndexedDB(jio_storage._database_name);
           })
@@ -618,7 +611,8 @@
             global_db = db;
             transaction = db.transaction(["attachment",
                     "blob"], "readwrite");
-        return promiseResearch(transaction, metadata._id, "attachment", "_id");
+            return promiseResearch(transaction,
+                                   metadata._id, "attachment", "_id");
           })
             .push(function (researchResult) {
             if (researchResult.result === undefined) {
@@ -626,8 +620,8 @@
                 "message": "indexeddbStorage unable to put attachment"});
             }
         //update attachment
-        researchResult.result._attachment = researchResult.result._attachment
-                    || {};
+            researchResult.result._attachment = researchResult.
+                result._attachment || {};
             researchResult.result._attachment[metadata._attachment] =
                     (BlobInfo === undefined) ? "BlobInfo" : BlobInfo;
             return putIndexedDB(researchResult.store, researchResult.result);
@@ -638,9 +632,8 @@
             return putIndexedDB(store, {"_id": metadata._id,
               "_attachment" : metadata._attachment,
               "blob": metadata._blob}, readResult);
-      })
-      .push(function () {
-        return ({"digest": digest});   //xxx
+          }).push(function () {
+            return {"status": 204};
           })
           .push(undefined, function (error) {
         // Check if transaction is ongoing, if so, abort it
@@ -653,6 +646,7 @@
             throw error;
           })
             .push(command.success, command.error, command.notify);
+      });
   };
 
 
@@ -688,7 +682,7 @@
       })
         .push(function (result) {
           //get data
-        if (typeof result.blob === "string") {
+        if (result.blob.byteLength !== undefined) {
           result.blob = new Blob([result.blob],
                                 {type: "text/plain"});
         }