How does Evernote map the image resources in .enex file?

[actant 22]

Below is an image of the source code of an .enex file. The note has two local images. The <en-media> tag uses a hash code as the "url" for each local image.

Do you experts know how EN  maps a hash code to the image resource? In other words, if I generate an .enex file from my resources, how can I generate a hash code as the "url" to the local image resource?

Thank you!

[eric99 1,077]

41 minutes ago, actant said:

Below is an image of the source code of an .enex file. The note has two local images. The <en-media> tag uses a hash code as the "url" for each local image.

Do you experts know how EN  map a hash code to the image resource? In other words, if I generate an .enex file from my resources, how can I generate a hash code as the "url" to the local image resource?

Thank you!

"...Those inline images are CDATA encoded base64 strings. They don’t include a hash, but I figured out that decoding the base64 string and then running it through MD5 generates the hash that is used in the corresponding <en-media> tag..."  https://simonwillison.net/2020/Oct/16/building-evernote-sqlite-exporter/

So, as I read this, it's a MD5 calculation on the raw image data.

[agsteele 3,056]

The local copy of the data file - image in your example - has a similarly numbered filename but lacking the file suffix.

So I have a PDF file in one of the directories in the form 004471xc########################

It sits in the resource-cache\User123456\004471xc-####-####-####-############

If I want to open that outside Evernote then I need to copy that and add the appropriate file suffix so that it will open in a file viewer.

Do tell us what you are hoping to achieve and it may be that we can give a more useful response.

[actant 22]

@eric99  Thank you for sharing!

@agsteele I just want to write an .enex generator to organize some texts and images into an .enex file which is then imported to EN.

[agsteele 3,056]

I'd say @eric99 has pointed you in a useful direction.

[eric99 1,077]

Just FYI, this is the offical ENML doc: https://dev.evernote.com/doc/articles/enml.php#added

Now that I've written my own html exporter, I'm even more impressed with the ENEX format, a very strict note description format, with no ambiguities like the free style markdown dialects in other note taking apps.