SNU eTL Batch Downloader

Download lecture files, videos, and assignment info from SNU eTL (Canvas LMS).

Features

• Files: Download all files in a course, preserving the eTL folder structure
• Videos: SNU-CMS lecture videos and YouTube-embedded videos
• Assignments: Save assignment details (due date, points, submission type) as HTML
• Semester filter: Download only courses matching a specific semester (e.g. 2026-1)
• Incremental: Skips already-downloaded files on re-run
• Session caching: Login once, reuse the session until it expires (--logout to clear)

Requirements

• Python 3.11+
• uv
• A Chromium-based browser (Chrome, Edge, etc.) — ChromeDriver is managed automatically

Setup

git clone https://github.com/MilkClouds/snu_downloader.git
cd snu_downloader
uv sync

Usage

uv run python main.py [options]

Flag	Description	Default
-s, --semester	Filter by semester (e.g. 2026-1)	all semesters
-l, --lecture	Course ID or all	all
-d, --dir	Output directory	./downloads
-y, --yes	Skip disclaimer prompt
--logout	Clear saved session and exit

On first run, a Chrome window opens for SNU SSO login (MFA supported). Subsequent runs reuse the saved session.

The course ID can be found in the eTL URL: https://myetl.snu.ac.kr/courses/<id>

Examples

# Download all courses from 2026 spring semester
uv run python main.py -s 2026-1

# Download a single course
uv run python main.py -l 123456

# Download to a custom directory, skip disclaimer
uv run python main.py -s 2026-1 -d ~/lectures -y

Output structure

downloads/
  <course name>/
    lecture.pdf
    <subfolder>/
      slides.pptx
    _assignments/
      <assignment>.html
    _videos/
      <lecture>.mp4

Disclaimer

This program is not affiliated with Seoul National University. Use at your own risk.

Libraries Under Consideration

• SeleniumBase — Selenium-based browser automation framework
• Vibium — Browser automation tool
• Helium — Lightweight Selenium wrapper

Credit

• junukwon7