Retrieving pdf file stored in Sharepoint

Hi,

I am trying to retrieve the files stored in SharePoint location as part of CRM integration with SharePoint. I am doing it in Mobile API. I am getting the site url, relative url and document name from CRM.

I am using HHTPRequest to retrieve the document.

string resourceUrl = siteUrl + "/_api/web/GetFolderByServerRelativeUrl('" + relativePath + "')/Files('" + fileName + "')/$value";

I am able to retrieve the document, but not getting entire content. But if I access the above url in browser I am getting the entire pdf document.

Also I tried using direct url to retrieve the same thing is happening.

Any help in this regard will be really helpful.

Regards,

Pramod