how to get bytes of media and mimtype in umbraco 7 backoffice

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Andrew Hawken 59 posts 116 karma points c-trib

Sep 14, 2015 @ 18:56
1

How to get bytes of media and mimtype in Umbraco 7 backoffice

Extending Umbraco

Umbraco 7
I'm hooking into ContentServicePublished and I need to get at the actual media of a node - expressly to get the MimeType and read the bytes from disk/http to create a CouchDb Attachment).

I can get 'close' with
```
var media  = ApplicationContext.Current.Services.MediaService.GetById(mediaid);
//or

var media2 =  helper.Media(mediaid);
//where helper is an  Umbraco.Web.UmbracoHelper 
```
but this just gets me a Media object with bunch of properties - I can see the url
```
ms.Properties["umbracoFile"]
```
but that looks like a URL rather than I file. I guess I can cludge something together to read it from the filesystem by pretending its a path relative to AppDomain.CurrentDomain.BaseDirectory but that feels like a terrible mistake, especially if its configured to store it on Azure or Amazon!

I could read the URL with webclient, but I don't know how to get the current hostname?

I feel I'm missing something obvious: time to ask!
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jivan thapa 194 posts 681 karma points

Sep 14, 2015 @ 19:39

0

This may help you, try to look at /Settings/Media Types/Image and see the Generic properties.

You can use alias "umbracoExtension" and "umbracoBytes".

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Andrew Hawken 59 posts 116 karma points c-trib

Sep 14, 2015 @ 20:15

0

That's not quite helping. the umbracoBytes contains the length and umbracoFile gets me the filename (path in fact) and umbracoExtension gets the file extension (so I can use that to product a Mime Type) but I want to read the file itself. What is the best way to read the content of the file into memory, given all I have is a relative path?

i.e. is there a public class/method that is used by the umbraco backend that is aware of things like UmbracoFileSystemProviders in order to get the file itself (whether it is stored locally or via https://github.com/JimBobSquarePants/UmbracoFileSystemProviders.Azure for instance.)

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Andrew Hawken 59 posts 116 karma points c-trib

Sep 14, 2015 @ 22:14

0

Having spent the evening reading some Umbraco source code, I think what I need is IFileSystem. There are probably enough clues in the Umbraco.Web.Editors.ImagesController to see what I need to do.

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Andrew Hawken 59 posts 116 karma points c-trib

Feb 05, 2017 @ 17:38

As (16 months later) I was looking for this (again) here the the answer I came up with ...

   public class SheetIOMediaReader
{
    public byte[] Read(IMedia med)
    {
        if (med != null)
        {
            var mediaFileSystem = FileSystemProviderManager.Current.GetFileSystemProvider<MediaFileSystem>();
            var imagePath = med.Properties["umbracoFile"].Value.ToString();
            var fullOrgPath = mediaFileSystem.GetFullPath(mediaFileSystem.GetRelativePath(imagePath));
            if (!mediaFileSystem.FileExists(fullOrgPath))
            {
                return null;
            }
            byte[] res = null;

            using (var fileStream = mediaFileSystem.OpenFile(fullOrgPath))
            {
                if (fileStream.CanSeek) fileStream.Seek(0, 0);
                byte[] buffer = new byte[16*1024];
                using (MemoryStream ms = new MemoryStream())
                {
                    int read;
                    while ((read = fileStream.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        ms.Write(buffer, 0, read);
                    }
                    res = ms.ToArray();
                }

            }
            return res;

        }
        return null;
    }
}

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James Lau 37 posts 58 karma points

Mar 27, 2018 @ 06:58

Hi,

I am using Umbraco 7.5.13. The IMedia "umbracoFile" property value returned is a JSON string. It must be parsed.

            dynamic jsonValue = JObject.Parse(imagePath);
            string propertyValue = jsonValue.src.Value;

            var relativePath = mediaFileSystem.GetRelativePath(propertyValue);
            var fullOrgPath = mediaFileSystem.GetFullPath(relativePath);

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