DbTool | SQL Database library

Your setup function needs to be async Make the following changes to your function declaration:

package WEB-INF.classes; is incorrect; your 'root' is WEB-INF/classes, and then you have dirs for your packages inside that. Putting your source files in WEB-INF/classes is also not correct.

It sounds like your IDE configuration and/or build file is messed up. I'd start from the first page of the tutorial, set up a project properly, and then take that knowledge and fix your project here. The question doesn't include sufficient details (e.g. no mention of which web framework we're looking at here) to get into specifics, but as a general idea, your project structure should generally involve something along the lines of:

The folder you are saving to, is read only

java.io.FileNotFoundException: /private/var/folders/zr/x6pt52n96pj59fcrfpyqk__m0000gn/T/AppTranslocation/01746F71-9829-4974-9624-E9464A2E0B4F/d/OracleDataModeler-17.3.0.261.1529.app/Contents/Resources/datamodeler/datamodeler/types/defaultdomains.xml (Read-only file system)

Just move the SQL dev Data modeler to another folder on which you can write (desktop for instance), or just "Save As" at another place.

go to ORDS/params folder and look in ords_params.properties file and make sure that db.hostname is correct. Should be the fully-qualified name of your server

Thus you are sending your request using AJAX with content type "application/x-www-form-urlencoded" Tomcat is limiting the max allowed POST size (defaults to 2MB). To make it work in APEX you have possibly 2 ways

1) Do some kind of double chunked upload, so first you split the file itself with e.g. file.slice() and then you build the 30k base64 array of each file chunk and upload this, chunk by chunk

2) Use a "multipart/form-data" content type with an form submit, thus here you are not running in Tomcats limitation of 2MB.

I built a file uploader plugin some time ago, just have a look at this function:

https://github.com/Dani3lSun/apex-plugin-dropzone/blob/90a82f4bb83fee9d78458af790560fb6c5b77978/server/js/apexdropzone.js#L378

The uploaded file will then be inserted into apex_application_files automatically, from there you can grab it:

https://github.com/Dani3lSun/apex-plugin-dropzone/blob/90a82f4bb83fee9d78458af790560fb6c5b77978/source/render_region.sql#L332

I would not recommend doing it with ORDS when you can do it inside of your APEX app, thus you have to deal with security, additional authentication etc...

Change the last then chained to finally. It will always close the client connection and return user as expected from the previous then.