Get stream to file in ImageVault 3.

Robert Baarda

Vote:

We are currently working on a project which uses ImageVault 3.5 and we need to get a stream or byte array of several files. Does anyone know how to do this? IVFileData.OpenRead() doesn't seem to work. When looking at this class with a decompiler we see the following code.

public Stream OpenRead()
{
throw new ApplicationException("ImageVault does not support read with Unified File System");
}

Thanks in advance!

#75679

Oct 03, 2013 15:59

Vote:

This is not possible using the public API, But the following blog post shows how you can get access to the file on disk.

http://www.meridium.se/sv/blogg/2010/05/14/width-and-height-of-an-image/

/Johan

#75744

Oct 04, 2013 14:03

Robert Baarda

Vote:

Hi Johan,

Thanks for your reply, we used the FileWrapper instance as shown in the blog post.
This object contains a public File field which is an instance of FileInfo which contains the correct path to the physical file on disk.
We used FileInfo.OpenRead() to get the stream.

Thanks!

Best Regards,

Robert.

#75745

Oct 04, 2013 14:07

Robert Baarda

Vote:

Hi Johan,

How would we do this in ImageVault 4.7?
Thanks in advance!

Regards,

Robert.

#122466

Jun 03, 2015 9:36

Vote:

In ImageVault 4 there is a backend service that is responsible for storage, conversion etc. This service might be located on another machine and the actual storage of files is handled by a plugable storage provider which might not use the filesystem. Hence you can not get access to the actual file from the client.
You will have to rely on getting the media file using the URL provided by the API.

Though if you need access to the actual files you can write your own storage module for this using the IMediaStorage interface.

If you could describe the problem you want to solve we might be able to provide an alternative solution.

/Johan

#122481

Jun 03, 2015 12:11

Robert Baarda

Vote:

Hi Johan,

Thanks, that is what I'm experimenting with at the moment, grabbing the file(s) by their URLs.
We're trying to create a zip file from a subset of imagevault files which people can select on the front-end side.
I've seen some methods on service interfaces in the ImageVault API documentation which (according to their name) seem to create zip files, but I'm not really sure on how to use them and if the zip files are stored on the ImageVault backend.

Regards,

Robert.

#122483

Jun 03, 2015 12:18

Vote:

You should be able to use the function in MediaContentService to create a zip file.

http://imagevault.se/DeveloperDocumentation/Reference/html/M_ImageVault_Common_Services_IMediaContentService_CreateZipArchive.htm

See this example on how to call the services directly.

http://imagevault.se/en/documentation/api-documentation/?page=csharp/services.html

/Johan

#122488

Jun 03, 2015 12:29

Robert Baarda

Vote:

If I would like to get/zip the original format for the collection of files, what would I pass as 'mediaFormatId' parameter in the CreateZipArchive method? And how would I use the returned string?

Regards,

Robert.

#122498

Edited, Jun 03, 2015 14:01

Vote:

Try something like this

var mediaContentService = client.CreateChannel<IMediaContentService >();
var key = mediaContentService.CreateZipArchive( new [] {2520,2519,2491} , 1);
var url = new Uri(new Uri(ClientConfigurationSection.Instance.ImageVaultCore.CurrentAddress), "MediaStreamService/Archive/" + key + "/package.zip?download=1");

/Johan

#122510

Jun 03, 2015 15:38

Robert Baarda

Vote:

That works like a charm. But it leaves a file on the server though. Is there anyway to configure imagevault so that these are cleaned up in some sort of way. Or should we implement some sort of garbage collection on our own?

Thanks!

Regards,

Robert.

#122512

Jun 03, 2015 15:53

Vote:

The CleanUpJob should remove files older than 24 hours.

/Johan

#122514

Jun 03, 2015 16:15

Robert Baarda

Vote:

Great! Thanks a lot for your time and help!

Robert.

#122515

Edited, Jun 03, 2015 16:18