PDF Streaming in Document Viewer

[chintan.shah]

Hello VintaSoft,

• Can we use URL/HTTP Web URL to connect Document Viewer instead of File Path or network path?

• Can we stream PDF in document viewer? We found that linearize pdf (Fast web view) is very quick and it loads the PDF in chunks, so if there is a large PDF file (e.g. 1 GB PDF size) then it doesn't wait to download whole 1 GB and it loads PDF metadata (file header) with few initial pages and show the initial pages and in background it loads other pages

FYI: We are talking about Document Viewer which has demo at : https://demos.vintasoft.com/AspNetCoreD ... iewerDemo/

Thank you
Chintan Shah

[Alex]

Hello Chintan,

VintaSoft Web Document Viewer uses Vintasoft web services (ASP.NET Core API controllers, ASP.NET MVC5 controllers or ASP.NET HTTP handlers) to access files with images and documents.

Each Vintasoft web service uses the data storage (IDataStorage) to access stream with file data.

Current version (12.2.7.1) of VintaSoft Imaging .NET SDK provides 2 ready-to-use types of data storages:

• StreamDataStorageOnDisk - a data storage that stores streams in files on disk.
• CloneableObjectStorageInMemory - a data storage that allows to store objects, which implement the System.ICloneable interface, in memory.

Current version (12.2.7.1) of VintaSoft Imaging .NET SDK does not have ready-to-use functionality for solving your task but you can develop necessary functionality by yourself. For solving your task you need to do the following steps:

• Create the StreamingStream class that derives from System.IO.Stream class and allows to read file data from URL using HTTP byte range requests.
• Create the StreamingDataStorage class that implements Vintasoft.Data.IDataStorage interface and uses the StreamingStream class to access the file data. As example please see this article: https://www.vintasoft.com/docs/vsimagin ... abase.html
• Create Vintasoft web services, which use instance of StreamingDataStorage class as a data storage.

Please let me know if you will have any question or problem.

Best regards, Alexander

[Alex]

Hello Chintan,

VintaSoft Imaging .NET SDK 12.3 has been released today. Now WebDocumentViewerJS class can open files hosted on an HTTP server (URL) without uploading the file data onto the application's web server. You can test this functionality in VintaSoft ASP.NET Core Imaging Demo if you will click "Upload and open file from URL".

Best regards, Alexander