From 1bd9a5646867e8c8fd95b7d789cfd6e617c229fc Mon Sep 17 00:00:00 2001
From: Andrea Dell'Amico <andrea.dellamico@isti.cnr.it>
Date: Wed, 13 Apr 2022 19:29:34 +0200
Subject: [PATCH] First working prototype.

---
 .gitignore            |  1 +
 README.md             | 26 ++++++++++++++--
 createdir.service     | 14 +++++++++
 dircreate/__init__.py | 69 +++++++++++++++++++++++++++++++++++++++++++
 requirements.txt      |  9 ++++++
 5 files changed, 117 insertions(+), 2 deletions(-)
 create mode 100644 createdir.service
 create mode 100644 dircreate/__init__.py
 create mode 100644 requirements.txt

diff --git a/.gitignore b/.gitignore
index 55be276..ea68efc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -152,3 +152,4 @@ cython_debug/
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
 
+*.ini
diff --git a/README.md b/README.md
index 530873c..ce2a3f0 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,26 @@
 # nfs-dirmaker
 
-Creates a directory into a NFS server exported file system.
-We use it to create the users' home directory before trying the mount via autofs
\ No newline at end of file
+Creates a directory into a NFS server exported file system.
+We use it to create the users' home directory before trying the mount via autofs.
+
+## Requirements
+
+* Python 3.8+
+* Flask 2.1
+
+### Build the environment
+
+``` shell
+python3 -m venv venv
+. venv/bin/activate
+pip install Flask
+```
+
+### Run the service
+
+``` shell
+source ./venv/bin/activate
+export FLASK_APP=dircreate
+export FLASK_ENV=development
+flask run
+```
diff --git a/createdir.service b/createdir.service
new file mode 100644
index 0000000..cc73507
--- /dev/null
+++ b/createdir.service
@@ -0,0 +1,14 @@
+[Unit]
+Description=Small service that creates a directory
+After=syslog.target network.target
+
+[Service]
+Environment=FLASK_CONFIG=production
+Environment=FLASK_APP=dircreate
+User=dircreate
+WorkingDirectory=/opt/dircreate
+ExecStart=/opt/createdir/venv/bin/gunicorn -b localhost:5000 dircreate:app
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
diff --git a/dircreate/__init__.py b/dircreate/__init__.py
new file mode 100644
index 0000000..ce0021f
--- /dev/null
+++ b/dircreate/__init__.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+
+import configparser
+import os
+from os.path import exists
+from flask import Flask
+from flask import request
+
+debug = False
+
+if debug:
+    config_path_dir = '/tmp'
+else:
+    config_path_dir = './instance'
+config_filename = f"{config_path_dir}/config.ini"
+
+if exists(config_filename):
+    config = configparser.ConfigParser()
+    config.read(config_filename)
+    if debug:
+        print("Sections found in the config file: ", config.sections())
+    if 'create-homedir' in config.sections():
+        for key in config['create-homedir']:
+            if debug:
+                print('Key: ', key)
+            if config['create-homedir']['SECRET_KEY']:
+                SECRET_KEY = config['create-homedir']['SECRET_KEY']
+            else:
+                raise SystemExit('Error: config file, no SECRET_KEY found.')
+            if config['create-homedir']['DIR_PREFIX']:
+                DIR_PREFIX = config['create-homedir']['DIR_PREFIX']
+            else:
+                raise SystemExit('Error: config file, no DIR_PREFIX found.')
+    else:
+        raise SystemExit('Error: no create-homedir section found.')
+else:
+    raise SystemExit('Error: no config file found.')
+
+def make_homedir(dir_path):
+    if not os.path.isdir(dir_path):
+        permissions = 0o700
+        try:
+            os.mkdir(dir_path, permissions)
+        except OSError:
+            return("Creation of the directory %s failed" % dir_path), 500
+        else:
+            return("Directory %s created successfully" % dir_path), 200
+    else:
+        return("Directory %s already exists" % dir_path), 200
+
+def create_app(test_config=None):
+    # create and configure the app
+    create_home = Flask(__name__, instance_relative_config=True)
+    # ensure the instance folder exists
+    try:
+        os.path.isdir(DIR_PREFIX)
+    except OSError:
+        pass
+
+    # a simple page that says hello
+    @create_home.route('/', methods=['GET', 'POST'])
+    def makedir():
+        if request.method == 'POST':
+            username = request.form['user']
+            return make_homedir(f"{DIR_PREFIX}/{username}")
+        else:
+            return "Nosey, aren't you?"
+
+    return create_home
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..a3236d0
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,9 @@
+click==8.1.2
+Flask==2.1.1
+gunicorn==20.1.0
+importlib-metadata==4.11.3
+itsdangerous==2.1.2
+Jinja2==3.1.1
+MarkupSafe==2.1.1
+Werkzeug==2.1.1
+zipp==3.8.0