added the server component.

README.md

@@ -6,7 +6,7 @@ Python 3.6+
 #### Master
 Python packages: `requests bs4`  
 #### Server
-Python packages: `flask`  
+Python packages: `flask passlib argon2_cffi`  
 #### Slave
 Python packages: ` `  
 

config_server.py.template

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+"""
+Configuration settings for overwrought_server.py.
+`modpack_name` is used for vanity purposes when naming the modpack.
+`pw_hash` is the argon2-hashed version of the modpack owner's password.
+`mods_dir` is the directory to place the mod files in for download. Your
+web server/reverse proxy eg. Nginx should allow access to this directory.
+"""
+modpack_name = "motherlode1"
+pw_hash = "PW_HASH"
+mods_dir = "/var/www/overwrought/mods"
+"""

overwrought_server.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+"""
+The overwrought server, for exchanging mods from master to slave recipients.
+"""
+import json
+import sqlite3
+import threading
+
+from passlib.hash import argon2
+from flask import Flask, send_file, request, abort
+
+import config_server
+
+app = Flask(__name__)
+app.config['db_lock'] = threading.Lock()
+
+@app.route('/')
+def index():
+	"""
+	Main index page. Displays the mod summary page.
+	"""
+	return send_file(config_server.modpack_name + '.html')
+
+@app.route('/get')
+def get():
+	"""
+	Returns all mod file entries contained in the database as JSON.
+	Determing which files to update is left as an exercise up to the
+	client.
+	"""
+	app.config.get('db_lock').acquire()
+	con = sqlite3.connect('modpack.db')
+	cur = sqlite3.cursor()
+	mods = cur.execute('SELECT filename FROM mod').fetchall()
+	app.config.get('db_lock').release()
+
+	mods = [mod[0] for mod in mods]
+	return json.dumps(mods)
+
+@app.route('/post', methods=['POST'])
+def post():
+	"""
+	Allows the modpack owner to upload new mods and a new database to the
+	server. Owner must be validated.
+	"""
+	password = request.form.get('password')
+	if not argon2.verify(password, config_server.pw_hash):
+		abort(401)
+
+	db = request.files.get('database')
+	app.config.get('db_lock').acquire()
+	db.save('modpack.db')
+	app.config.get('db_lock').release()
+
+	for fname, file in request.files.items():
+		if fname == 'modpack.db':
+			continue
+		file.save(os.path.join(config_server.mods_dir, fname))
+
+def generate_hash(password):
+	"""
+	A utility for generating an argon2 password hash.
+	"""
+	pw_hash = argon2.hash(password)
+	return pw_hash
+
+if __name__ == "__main__":
+	import argparse
+
+	parser = argparse.ArgumentParser(
+		description="The overwrought server. Use gunicorn to start."
+	)
+	parse.add_argument(
+		'action',
+		choices=['hash'],
+		help="What action to perform.",
+	)
+	parse.add_argument(
+		'target',
+		help="The target to perform the action on."
+	)
+	args.parse_args()
+
+	if args.action == "hash":
+		pw_hash = generate_hash(args.target)
+		print(pw_hash)