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This page contains code samples for generating E-Invoices through APIs. Refer to https://www.gstzen.in/a/generate-e-invoice-api.html for more details.

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import os
import io
import tempfile
import subprocess
import logging
import zipfile
from contextlib import contextmanager

logger = logging.getLogger(__name__)

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from django.conf import settings

settings.configure(
    DEBUG=True,
    SECRET_KEY='A-random-secret-key!',
    EMAIL_BACKEND = 'postmarker.django.EmailBackend',
    POSTMARK = {
        'TOKEN': 'POSTMARK_API_TEST',
        'TEST_MODE': True,

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\section{\mysidestyle Education}
{\bf PhD in Computer Sciences \hfill August '03 - May '10} \\
Thesis: Dynamic Software Updates: A VM-Centric Approach \\
Advisor: Prof. Kathryn S. McKinley \\
Department of Computer Science \\
The University of Texas at Austin

{\bf Master of Science in Computer Sciences \hfill August '03 - May '06} \\
Department of Computer Science \\
The University of Texas at Austin

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Security issues with GST Network's Authentication API

One line summary. GSTN's use of OTP for authentication is not very secure. GSTN should use a standard like OAuth

The GST Network's (GSTN) version 0.2 draft API propose using a One-Time Password (OTP) for a Software to authenticate on behalf of a Tax Payer (user). The design of the Authentication API is documented here. The Authentication API is well designed to ensure that data communicated between any software and GSTN in secure.

However, the API uses an OTP to authenticate software on behalf of a user. Here is a relevant quote from the API document.

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Hello

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Distance (Score) 0.0
Link Content Length 33
Link Content Word Count 6
Link Content 'Sushil Kumar v.  Rakesh  Kumar[6]'
Link Target 23285 Sushil Kumar Vs. Rakesh Kumar
================================================================================
Distance (Score) 0.0001433401630492881
Link Content Length 38
Link Content Word Count 6
Link Content 'Anil\n      Rishi v. Gurbaksh Singh[1],'

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ffff

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The script run-and-stop-gunicorn.sh takes 1 second on both Python 2.7 and 3.4.

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.2 LTS"
$ 
$ 
$ source 27-env/bin/activate