fix blob storage exception in chrome browser

src/jio.storage/indexeddbstorage.js

@@ -28,7 +28,7 @@
  */
 
 /*jslint indent: 2, maxlen: 80, nomen: true */
-/*global define, module, require, indexedDB, jIO, RSVP, Blob */
+/*global define, module, require, indexedDB, jIO, RSVP, Blob*/
 
 (function (dependencies, factory) {
   "use strict";
@@ -134,19 +134,28 @@
    *@param {Object} metadata The data to put in
    *@return a new promise
    */
-  function putIndexedDB(store, metadata) {
-    function resolver(resolve, reject) {
-      var request = store.put(metadata);
+  function putIndexedDB(store, metadata, readData) {
+    var request,
+      resolver;
+    try {
+      request = store.put(metadata);
+      resolver = function (resolve, reject) {
         request.onerror = reject;
         request.onsuccess = function () {
           resolve(metadata);
         };
-    }
+      };
       return new RSVP.Promise(resolver);
+    } catch (e) {
+      return putIndexedDB(store, {"_id": metadata._id,
+                                  "_attachment" : metadata._attachment,
+                                  "blob": readData});
+    }
   }
 
 
 
+
   /**
    * get a data from a store object
    * @param {ObjectStore} store The objectstore
@@ -579,18 +588,20 @@
    *
    * @param  {Object} command The JIO command
    * @param  {Object} metadata The data
+   *
    */
-
   IndexedDBStorage.prototype.putAttachment = function (command, metadata) {
     var jio_storage = this,
       transaction,
       global_db,
       BlobInfo,
-      digest;
+      digest,
+      readResult;
     new RSVP.Queue()
-        .push(jIO.util.readBlobAsBinaryString(metadata._blob).
+            .push(jIO.util.readBlobAsText(metadata._blob).
         then(function (e) {
-          digest = jIO.util.makeBinaryStringDigest(e.target.result);
+          digest = jIO.util.makeBinaryStringDigest(e.target.result);     //xxx
+          readResult = e.target.result;
           BlobInfo = {
             "content_type": metadata._blob.type,
             "digest": digest,
@@ -618,7 +629,7 @@
         researchResult.result._attachment = researchResult.result._attachment
                     || {};
         researchResult.result._attachment[metadata._attachment] =
-                BlobInfo;
+                    (BlobInfo === undefined) ? "BlobInfo" : BlobInfo;
         return putIndexedDB(researchResult.store, researchResult.result);
       })
       .push(function () {
@@ -626,10 +637,10 @@
         var store = transaction.objectStore("blob");
         return putIndexedDB(store, {"_id": metadata._id,
           "_attachment" : metadata._attachment,
-                                    "blob": metadata._blob});
+          "blob": metadata._blob}, readResult);
       })
       .push(function () {
-        return ({"digest": digest});
+        return ({"digest": digest});   //xxx
       })
             .push(undefined, function (error) {
         // Check if transaction is ongoing, if so, abort it
@@ -644,6 +655,8 @@
             .push(command.success, command.error, command.notify);
   };
 
+
+
   /**
    * Retriev a document attachment
    *
@@ -675,6 +688,10 @@
       })
         .push(function (result) {
           //get data
+        if (typeof result.blob === "string") {
+          result.blob = new Blob([result.blob],
+                                {type: "text/plain"});
+        }
         return ({ "data": result.blob});
       })
       .push(undefined, function (error) {
@@ -690,6 +707,7 @@
             .push(command.success, command.error, command.notify);
   };
 
+
   /**
    * Remove an attachment
    *

test/jio.storage/indexeddbstorage.tests.js

@@ -28,12 +28,14 @@
   }
 
   test("Scenario", 32, function () {
+//    indexedDB.deleteDatabase("jio:test");
     var server, shared = {}, jio = jIO.createJIO(
       {"type"     : "indexeddb",
         "database" : "test"
         },
       {"workspace": {}}
     );
+
     stop();
     server = {restore: function () {
       return;