Read files information from document library using javascript clinet object model.

Hi,

We have a document library and it contains items with some documents. I want to read the list item from the library and get the File(uploaded document) information as "stream or bytes". I am able to get the items using sharepoint 2013 javascript client object model. I found a method to get the stream. oListItem.get_File().saveStream. But  this is giving error when i am using this property.

Can we read the file information using javascript client object model or JQuery?

Thanks,

Kiran