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import os
import re
import json
import sqlalchemy
from functools import wraps
from sqlalchemy.sql import select
from sqlalchemy.sql import text
from flask import Flask
from flask import render_template, send_from_directory, request, Response
from werkzeug.utils import secure_filename
import pprint
pp = pprint.PrettyPrinter(indent=4)
app = Flask(__name__)
db_engine = {}
db_metadata = {}
parts = {}
def check_auth(username, password):
admin_list = []
with open('edit_admin.json', 'r') as admin:
admin_list = json.load(admin)
for user in admin_list:
if username == user['username']:
return password == user['password']
def authenticate():
return Response('Could not verify access level. Please retry', 401, {'WWW-Authenticate' : 'Basic realm="Login Required"'})
def requires_auth(f):
@wraps(f)
def decorated(*args, **kwargs):
auth = request.authorization
if not auth or not check_auth(auth.username, auth.password):
return authenticate()
return f(*args, **kwargs)
return decorated
@app.route('/parts')
def index():
return render_template('partsearch.html')
@app.route('/parts/getpartinfo/<partID>')
def get_part_info(partID):
s = 'select * from parts where id = :id;'
r = db_engine.execute(text(s), id=partID)
l = []
for row in r:
l.append(dict(row))
r.close()
return json.dumps(l[0])
@app.route('/parts/query/<filter_dummy>/<query>')
def query(filter_dummy, query):
filter = request.args.to_dict()
keywords = query.split() # Default splits with spaces
for i in range(len(keywords)):
keywords[i] = '%' + keywords[i] + '%'
kw_dict = {}
for i in range(len(keywords)):
kw_dict["kw" + str(i)] = keywords[i]
s = 'select p.id,partno,description,l.name as location_descriptor from parts as p inner join locations as l on p.location_id = l.id where '
if filter['l']:
s += '('
for i in range(len(keywords)):
s += 'LOWER(l.name) like LOWER(:kw'+ str(i) +') AND '
s = s[:-5]
s += ') OR '
if filter['p']:
s += '('
for i in range(len(keywords)):
s += 'LOWER(partno) like LOWER(:kw'+ str(i) +') AND '
s = s[:-5]
s += ') OR '
if filter['d']:
s += '('
for i in range(len(keywords)):
s += 'LOWER(description) like LOWER(:kw'+ str(i) +') AND '
s = s[:-5]
s += ') OR '
if filter['n']:
s += '('
for i in range(len(keywords)):
s += 'LOWER(notes) like LOWER(:kw'+ str(i) +') AND '
s = s[:-5]
s += ') OR '
s = s[:-4] + ';'
print(s)
s = text(s)
r = db_engine.execute(s, kw_dict)
l = []
for row in r:
l.append(dict(row))
r.close()
return json.dumps(l)
@app.route('/parts/getfile/<filename>')
def getfile(filename):
if(re.match('^[\w\-_]+$', filename) == None):
return 'No injections pls.'
return send_from_directory('/srv/datasheets/', filename + '.pdf')
@app.route('/parts/alter/<partID>', methods=['POST'])
@requires_auth
def alter(partID):
partID = int(partID)
s = ''
if partID < 0:
# New entry
s = 'insert into parts (block, type, partno, partnoalt, partnoalt2, description, quantity, datasheet, notes) '
s += 'values (:block, :type, :partno, :partnoalt, :partnoalt2, :description, :quantity, :datasheet, :notes);'
s = text(s)
if len(request.files) != 0:
datasheet_file = request.files['datasheet-file']
datasheet_filename = secure_filename(datasheet_file.filename)
i = 1
while os.path.isfile('srv/datasheet/' + datasheet_filename):
datasheet_filename = datasheet_filename[:-4] + str(i) + '.pdf'
i += 1
datasheet_file.save('/srv/datasheets/' + datasheet_filename)
else:
datasheet_filename = None
r = db_engine.execute(s, block=request.form['block'],
type=request.form['type'],
partno=request.form['partno'],
partnoalt=request.form['partnoalt'],
partnoalt2=request.form['partnoalt2'],
description=request.form['description'],
quantity=request.form['quantity'],
datasheet=datasheet_filename,
notes=request.form['notes'])
else:
# Modify entry
r = db_engine.execute(text('select * from parts where id=:id;'), id=partID)
l = []
for row in r:
l.append(dict(row))
r.close()
s = 'update parts '
s += 'set block=:block, type=:type, partno=:partno, partnoalt=:partnoalt, partnoalt2=:partnoalt2, description=:description, quantity=:quantity, datasheet=:datasheet, notes=:notes '
if len(request.files) != 0:
datasheet_file = request.files['datasheet-file']
datasheet_filename = secure_filename(datasheet_file.filename)
i = 1
while os.path.isfile('srv/datasheet/' + datasheet_filename):
datasheet_filename = datasheet_filename[:-4] + str(i) + '.pdf'
i += 1
datasheet_file.save('/srv/datasheets/' + datasheet_filename)
if l[0]['datasheet'] != None:
os.remove('/srv/datasheets/' + l[0]['datasheet'])
else:
datasheet_filename = l[0]['datasheet']
s += 'where id=:id;'
s = text(s)
r = db_engine.execute(s, location_id=request.form['block'],
type=request.form['type'],
partno=request.form['partno'],
partnoalt=request.form['partnoalt'],
partnoalt2=request.form['partnoalt2'],
description=request.form['description'],
quantity=request.form['quantity'],
datasheet=datasheet_filename,
notes=request.form['notes'],
id=partID)
return '{"status":"ok"}'
@app.route('/parts/delete/<partID>')
@requires_auth
def delete(partID):
if partID < 0:
abort(400)
s = text('delete from parts where id=:id;')
r = db_engine.execute(s, id=partID)
return '{"status":"ok"}'
def connect(user, password, db, host='localhost', port=5432):
'''Returns a connection and a metadata object'''
# We connect with the help of the PostgreSQL URL
url = 'postgresql://{}:{}@{}:{}/{}'
url = url.format(user, password, host, port, db)
# The return value of create_engine() is our connection object
con = sqlalchemy.create_engine(url, client_encoding='utf8')
# We then bind the connection to MetaData()
meta = sqlalchemy.MetaData(bind=con, reflect=True)
return con, meta
if __name__ == '__main__':
with open('admin.json') as f:
postgres_credentials = json.load(f)
db_engine, db_metadata = connect(postgres_credentials['username'], postgres_credentials['password'], 'parts_v2')
parts = sqlalchemy.Table('parts', db_metadata)
# Example query
'''s = select([parts]).where(parts.c.notes != '')
for row in db_engine.execute(s):
print row'''
app.run('0.0.0.0')