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, send_file from PIL import Image, ImageDraw from io import BytesIO from werkzeug.utils import secure_filename 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 def serveImage(img): img_io = BytesIO() img.save(img_io, 'PNG') img_io.seek(0) return send_file(img_io, mimetype='image/png') @app.route('/parts') def index(): return render_template('partsearch.html') @app.route('/parts/getlocations/') def get_locations(): s = 'select id, map from locations' r = db_engine.execute(text(s)) l = {} for row in r: l[row[0]]=row[1] r.close() return json.dumps(l) @app.route('/parts/getpartinfo/') def get_part_info(partID): s = 'select * from parts as p inner join locations as l on p.location_id=l.id where p.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//') # TODO: maybe change AND to OR or maybe not 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] + ';' 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/map/') def getMap(mapurl): try: mapimage = Image.open('maps/' + mapurl) except FileNotFoundError: return serveImage(Image.open("maps/404.png")) if request.args.get('x') is not None and request.args.get('y') is not None: x = int(request.args.get('x')) y = int(request.args.get('y')) pointer = Image.open('maps/here.png') pointerLayer = Image.new("RGBA", mapimage.size) width, height = pointer.size pointerLayer.paste(pointer, (x - int(width/2), y-int(height/2))) mapimage = Image.alpha_composite(mapimage, pointerLayer) return serveImage(mapimage) @app.route('/parts/getfile/') 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/', 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/') @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')