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from flask import Flask, Response, redirect, url_for, request, session, abort, render_template, send_file
from flask_login import LoginManager, UserMixin, login_required, login_user, logout_user, current_user
from PIL import Image, ImageFont, ImageDraw
import qrcode
from io import BytesIO
import json, random, re, string, hashlib, base64
app = Flask(__name__)
systemURL = 'http://192.168.0.11:5000/' #FULL URL with a '/' at the end
systemURL = 'http://10.0.1.115:5000/'
randomchars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ123456789' #note the lack of zero
# flask-login
login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = "login"
admins={}
class Admin(UserMixin):
def __init__(self, name, password):
self.id = name
self.password = password
admins[name] = self
with open('links.json', 'r') as infile:
links = json.load(infile)
with open('admins.json', 'r') as infile:
adminfile = json.load(infile)
for key, value in adminfile.items():
if key=='secret_key':
app.secret_key = value
elif key=='secret_cookie':
secret_cookie = value.encode('utf-8')
else:
a = Admin(key, value['password'])
def saveFile():
with open('links.json', 'w') as outfile:
json.dump(links, outfile)
def randomToken():
code = ""
for i in range(0,6):
code += random.choice(randomchars)
return code
def codeValidation(code):
if len(code) not in range (3,10):
return False
if re.match('^[\w-]+$', code) is None:
return False
return True
def codeLink(code):
global links
if code not in links:
return False
if len(links[code]['url'])==0:
return None
return links[code]['url']
def createNewCode():
code=randomToken()
while code in links: #danger!
code=randomToken()
links[code]={'url':''}
return code
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('/code/<code>')
def serveCode(code):
code = code[:code.find('.')]
if codeValidation(code) is False:
return send_file('static/invalid.png', mimetype='image/png')
qr = qrcode.QRCode(
version=1,
error_correction=qrcode.constants.ERROR_CORRECT_M,
box_size=8,
border=3,
)
qr.add_data(systemURL + code)
qr.make(fit=True)
img = qr.make_image(fill_color="black", back_color="white")
return serveImage(img)
@app.route("/edit", methods=['GET', 'POST'])
def edit():
code = request.form.get("code") if request.form.get("code") is not None else request.args.get("code")
url = request.form.get("url")
if codeLink(code) is False:
return render_template('invalid.html', code=code)
if current_user.is_authenticated:
if url==None:
return render_template('editlink.html', code=code, url=codeLink(code), admin=current_user.is_authenticated)
else:
if url=='remove':
url = ''
links[code]['url']=url
saveFile()
return render_template('message.html', message="Done Mr. Admin person")
else:
if codeLink(code) is not None:
return render_template('cantedit.html', url=codeLink(code))
if url is None:
return render_template('editlink.html', code=code, url='', admin=current_user.is_authenticated)
#Saving the link:
if url.lower().startswith('https://') is False and url.lower().startswith('http://') is False:
return render_template('message.html', message="Only http:// and https:// links alowed. Plz fix your link!")
if len(url)>1000:
return render_template('message.html', message="This link is too long! It probably contains tracking data or other crap. Please find a shorter link.")
links[code]['url']=url
saveFile()
return render_template('success.html')
@app.route("/admin")
@login_required
def admin():
return render_template('admin.html')
# somewhere to login
@app.route("/login", methods=["GET", "POST"])
def login():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
hasher = hashlib.sha256()
hasher.update(password.encode('utf-8'))
hasher.update(secret_cookie)
hashedpassword = base64.b64encode(hasher.digest()).decode('utf-8')
if admins[username].password == hashedpassword:
login_user(admins[username])
return redirect(request.args.get("next"))
return abort(401)
else:
return render_template('login.html')
@app.route("/logout")
@login_required
def logout():
logout_user()
return redirect('/')
# callback to reload the user object
@login_manager.user_loader
def load_user(userid):
return admins[userid]
@app.route("/generate", methods=['GET', 'POST'])
def generate():
howmany = request.form.get("howmany")
if howmany is None:
return render_template('generate.html')
codes = []
for i in range(0, int(howmany)):
codes.append(createNewCode())
columns = 4
codesarray = [codes[i:i+columns] for i in range(0, len(codes), columns)]
saveFile()
humanSystemURL = systemURL[systemURL.find('//')+2:]
return render_template("printlabels.html", codes=codesarray, systemURL=humanSystemURL, codegenURL=systemURL+'code/', format='.png')
@app.route("/list")
@login_required
def list():
linklist = []
for key, value in links.items():
if len(value['url'])>0:
linklist.append({'code':key, 'url':value['url']})
return render_template('list.html', linklist=linklist, count=len(linklist))
@app.route("/empty")
@login_required
def showEmptyCodes():
linklist = []
for key, value in links.items():
if value['url']=='':
linklist.append({'code':key, 'url':value['url']})
return render_template('listempty.html', linklist=linklist, count=len(linklist))
@app.route('/', defaults={'path': ''})
@app.route('/<path:path>')
def catch_all(path):
if len(path)==0:
return render_template('welcome.html')
if path in links:
if codeLink(path) is not None:
return redirect(links[path]['url'], code=302)
else:
return render_template('newcode.html', code=path)
else:
return render_template('invalid.html', code=path)