Caprion QR Code

Caprion Data Analysis

Welcome!

This repository/site is dedicated to protein/peptide quantitative trait analysis using the Caprion platform, organized chronologically and logistically into the following sections.

📊 Pilot Studies

🔬 Analysis

📎 Additional Information

🌐 Local File/Web Browsing

It can be set up as follows:

cd /rds/project/rds-zuZwCZMsS0w/Caprion_proteomics/analysis
# As of 07/09/2025
module load ceuadmin/firefox/nightly
python3 -m http.server &
firefox http://127.0.0.1:8000 &

📌 Note: A local web server is needed and accessed by firefox or other browsers1.

🗂️ Web Page Structure

One can browse local mirrors and resources via the home page (index.html) served at the chosen port:

  • SRCF mirror — under /srcf
  • Colocalisation view — /json/coloc.html (hg19 positions)
  • Multiprotein isotope mappings — /dup/json/dup.htm
  • Supplementary tables
  • Caprion site — from /site

🔐 Remote (Non-CSD3) Access

Set up SSH tunneling to access the local web server from another machine:

1. On CSD3

python3 -m http.server 8000 &
hostname

2. On local machine

ssh -4 -L 8080:127.0.0.1:8000 -fN CRSid@${hostname}.hpc.cam.ac.uk

Then visit: http://127.0.0.1:8080

Ensure ${hostname} matches the result from CSD3 hostname.

  1. File browsing through a local web server

    Browsers treat local files in a folder as separate origins with cross-origin resource sharing (CORS) restrictions. A local web server enforces the same-origin policy (SOP) via a port (e.g., 8000) as follows:

    export pn=8000
if lsof -i :${pn}; then
    echo "Port ${pn} is already in use. Try another one."
else
    python3 -m http.server ${pn} &
    server_pid=$!
    firefox http://127.0.0.1:${pn} &
fi
# Release the port
kill $server_pid
# Check active processes with `ps`.

    One can launch Edge/Chrome using a module or a temporary user data directory if needed:

    module load ceuadmin/edge
# ~/.config/microsoft-edge
edge http://127.0.0.1:${pn} &
# If the Edge config is not available, use a temporary directory:
edge --user-data-dir=/tmp/edge http://127.0.0.1:${pn} &
# Google Chrome follows the Microsoft Edge syntax.

    ↩