mazurov/root-server

ROOT http server based on flask

CERN ROOT's http server in python

This web server returns objects from ROOT files in json format

Install

Prerequisites

1. PYTHONPATH environment variable should contain path to ROOT lib directory
2. Python's major version should be the same as used for ROOT compilation

Virtualenv

$> virtualenv venv
$> source venv/bin/activate
$> pip install -r requirements.txt

Run

From application's folder:

$> python run.py

By default the application runs with environments loaded from envs/default.env. You can change it by setting the enveronments' file in ENV environment. For example:

$> ENV=default python run.py # Will load env/default.env
$> ENV=production python run.py # Will load env/production.env

Configuration

The application configured through envirnment variables (see the section above). Default configuration:

ROOT_DATA=data
FLASK_PORT=8081
FLASK_HOST=0.0.0.0
DEBUG=True

• ROOT_DATA --- path to the root directory with ROOT files.
• FLASK_PORT and FLASK_HOST --- port and host for the web server
• DEBUG --- on/off debug mode

Request example

/?files=file1,file2,file3&items=item1,item2

Response example

{
  "result": [
    {
      "items": {
        "item1": {
          "_typename": "TGraph",
          ...
        },
        "item2": {
          "_typename": "TGraph",
          ...
        }
      },
      "root": "file1"
    },
    {
      "items": {
        "item1": {
          "_typename": "TGraph",
          ...
        },
        "item2": {
          "_typename": "TGraph",
          ...
        }
      },
      "root": "file2"
    }
  ]
}