fs.md

• StorageLimit
  • NW-Z1050 33MB
  • Nexus 7 770MB
• iPhone5 IndexedDB は blob は非サポート、arraybuffer では 200MB 以上利用可能。500MB使っても落ちない

Webkit does not support Blob in IndexedDB.

http://trac.webkit.org/changeset/163923 - IDB: Reimport storage/indexeddb tests from Blink

• http://trac.webkit.org/browser/releases/WebKitGTK/webkit-2.2/Source/WebCore/Modules/indexeddb/IDBObjectStore.cpp?rev=168002#L176

178         if (serializedValue->hasBlobURLs()) {
179	        // FIXME: Add Blob/File/FileList support
180	        ec = IDBDatabaseException::DataCloneError;
181	        return 0;
182	    }

• https://github.com/WebKit/webkit/blob/master/Source/WebCore/Modules/indexeddb/IDBObjectStore.cpp#L150

    if (serializedValue->hasBlobURLs()) {
        // FIXME: Add Blob/File/FileList support
        ec = IDBDatabaseException::DataCloneError;
        return nullptr;
    }

• Chrome (blink) は IndexdbDB でも BLOB をサポートしている
  • https://chromium.googlesource.com/chromium/blink/+/master/Source/modules/indexeddb/IDBObjectStore.cpp

Vector<WebBlobInfo> blobInfo;
    RefPtr<SerializedScriptValue> serializedValue = SerializedScriptValue::create(value, &blobInfo, exceptionState, scriptState->isolate());
    if (exceptionState.hadException())
        return 0;

https://chromium.googlesource.com/chromium/blink/+/253029b85fb8c5313e61b26987d830694a75ab94/LayoutTests/storage/indexeddb/noblobs-expected.txt

Confirm Blob/File/FileList limitations of WebKit's IndexedDB implementation.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
indexedDB = self.indexedDB || self.webkitIndexedDB || self.mozIndexedDB || self.msIndexedDB || self.OIndexedDB;
dbname = "noblobs.html"
indexedDB.deleteDatabase(dbname)
indexedDB.open(dbname)
store = db.createObjectStore('storeName')
store.put('value', 'key')
testBlob():
PASS FileReader != null is true
test_content = 'This is a test. This is only a test.'
blob = new Blob([test_content])
validateExceptions(blob):
transaction = db.transaction('storeName', 'readwrite')
store = transaction.objectStore('storeName')
Expecting exception from store.put(blob, 'key')
PASS Exception was thrown.
PASS code is DOMException.DATA_CLONE_ERR
Exception message: Failed to execute 'put' on 'IDBObjectStore': The object store currently does not support blob values.
Expecting exception from store.add(blob, 'key')
PASS Exception was thrown.
PASS code is DOMException.DATA_CLONE_ERR
Exception message: Failed to execute 'add' on 'IDBObjectStore': The object store currently does not support blob values.
request = store.openCursor()
cursor = request.result
Expecting exception from cursor.update(blob)
PASS Exception was thrown.
PASS code is DOMException.DATA_CLONE_ERR
Exception message: Failed to execute 'update' on 'IDBCursor': The object store currently does not support blob values.