saplearninghub-pdf-downloader

Download eBook as PDF from SAP Learning Hub.

Getting Started

Prerequisite

• NodeJS
• Google Chrome

You should put the path of chrome.exe in the config.json file in the attribute : CHROME_EXE. These are the default paths depending on your os :

• Windows : C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe
• Linux : /usr/bin/google-chrome

Installation

npm install

Usage

There are 4 modes :

• CLI
• Config file
• Node child process
• GUI

They can be mixed. For example you can set the user/password in the config file and set the URL in the CLI. The values from the CLI will override the values from the file.

The download URL of the eBook URL is on the learning hub :

Config File

Change the file config.json according to your needs. For windows, the TARGET_DIR must have double backslash for the path (for example : C:\\Users\\myuser\\Downloads)

npm run build
npm run start

CLI

Here is an example of the possible arguments

npm run build
npm run start --  --chrome="/usr/bin/google-chrome" --debug="false" --url="https://exmaple.com" --login="SUSER" --password="SUSER_PASSWORD" --target="./target_dir"

Node child process

Here is an example of how to use it as a library. The script will pipe the PDF stream out on the third file descriptor.

const child = child_process.fork(
  "../saplearninghub-pdf-downloader/dist/index.js",
  [
    `--url=${downloadURL}`,
    `--login=${login}`,
    `--password=${passord}`,
    `--chrome=${chromeExePath}`,
    `--stream=true`,
  ],
  {
    stdio: ["pipe", "pipe", "pipe", "pipe", "ipc"],
  }
);

child.stdio[3].pipe(stream);

GUI

For the GUI version, check the GUI repo : saplearninghub-pdf-downloader-gui

Test

Copy the config.json file into the root of the project with the name config_test.json. This file will be use by the test command. It also is gitignored so that no credentials will be committed.

npm run dev

Common issues

Can't connect

Can't connect :(
Error: Error during init

You can try to connect first and see if there is any popup or message you could suppress to avoid blocking the script. If it's still not working, I can only debug if you send me your credentials. I use my own user which has certainly a different type from yours and I don't have access to all user types.

Build With

• puppeteer - Headless Chrome Node.js API
• pdfkit - A JavaScript PDF generation library for Node and the browser
• babel - Babel is a compiler for writing next generation JavaScript.
• minimist - parse argument options
• webpack - A bundler for javascript and friends.
• nodemon - Monitor for any changes in your node.js application and automatically restart the server - perfect for development

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change. If you like the project, you can buy me a coffee.

License

MIT