Add information on contributions

.gitignore

@@ -2,7 +2,6 @@
 __pycache__/
 *.py[cod]
 *$py.class
-CACHEDIR.TAG
 
 # C extensions
 *.so

README.md

@@ -57,10 +57,16 @@ $ export FLASK_APP=src/main.py
 $ flask run
 ```
 
-This command should start a web server with which you can test your configuration. If you plan on exposing your printer to the Internet, and give it an IP / URL, _please, please, please_, don't run it this way. Look at Flask's documentation and read about running a production server. It's a little more work, but it will prevent your computer/server being hacked in too easily.  
+This command should start a web server with which you can test your configuration. If you plan on exposing your printer to the Internet, and give it an IP / URL, _please, please, please_, don't run it this way. Look at Flask's documentation and read about running a production server. It's a little more work, but it will prevent your computer/server being hacked in too easily.
 
 Voilà !
 
+## Contributions
+
+Your contributions are very much welcome ! You can either request an account on git.n07070.xyz, or send me a patch by email ( see git-send-mail.io ). Please [squash](https://www.geeksforgeeks.org/git/use-of-git-squash-commits/) yours commits into one commit, and add as much information in the commit's description. The more you add comments and descriptions, the better it is.
+
+Please also say if you had a printer to test your code, and which printer you've been using.
+
 ## Screenshots
 
 ![](src/static/images/homepage.png)

configuration/config.toml

@@ -6,12 +6,6 @@ vendor_id = 0x04b8
 device_id = 0x0e28
 upload_folder = "src/static/uploads"
 
-# Raspberry Pi Configuration
-[rpi]
-button_gpio_port_number = 17
-indicator_gpio_port_number = 18
-flash = true
-
 # Users = Password
 [users]
 admin = "admin"

configuration/config.toml.sample

@@ -5,12 +5,6 @@
 vendor_id = "0x04b8"
 device_id = "0x0e28"
 
-# Raspberry Pi Configuration
-[rpi]
-button_gpio_port_number = 17
-indicator_gpio_port_number = 18
-flash = true
-
 # Users = Password
 [users]
 admin = "admin"

requirements.txt

@@ -1,36 +1,36 @@
-Adafruit_Thermal>=1.1.0
-appdirs>=1.4.4
-argcomplete>=2.0.6
-cffi>=1.17.1
-click>=8.1.8
-commonmark>=0.9.1
-cryptography>=45.0.4
-Deprecated>=1.2.18
-escpos>=2.0.0
-Flask>=2.1.3
-Flask-Limiter>=2.4.5.1
-future>=0.18.3
-itsdangerous>=2.1.2
-Jinja2>=3.1.6
-limits>=2.6.3
-MarkupSafe>=2.1.5
-numpy>=2.3.0
-packaging>=21.3
-pillow>=11.2.1
-pycparser>=2.22
-Pygments>=2.12.0
-pyparsing>=3.0.9
-pyserial>=3.5
-python-barcode>=0.13.1
-pyusb>=1.2.1
-PyYAML>=6.0.2
-qrcode>=7.3.1
-rich>=12.4.4
-setuptools>=80.9.0
-six>=1.16.0
-toml>=0.10.2
-typing_extensions>=4.2.0
-Unidecode>=1.3.8
-viivakoodi>=0.8.0
-Werkzeug>=2.1.2
-wrapt>=1.14.1
+Adafruit_Thermal==1.1.0
+appdirs==1.4.4
+argcomplete==2.0.6
+cffi==1.17.1
+click==8.1.8
+commonmark==0.9.1
+cryptography==45.0.4
+Deprecated==1.2.18
+escpos==2.0.0
+Flask==2.1.3
+Flask-Limiter==2.4.5.1
+future==0.18.3
+itsdangerous==2.1.2
+Jinja2==3.1.6
+limits==2.6.3
+MarkupSafe==2.1.5
+numpy==2.3.0
+packaging==21.3
+pillow==11.2.1
+pycparser==2.22
+Pygments==2.12.0
+pyparsing==3.0.9
+pyserial==3.5
+python-barcode==0.13.1
+pyusb==1.2.1
+PyYAML==6.0.2
+qrcode==7.3.1
+rich==12.4.4
+setuptools==80.9.0
+six==1.16.0
+toml==0.10.2
+typing_extensions==4.2.0
+Unidecode==1.3.8
+viivakoodi==0.8.0
+Werkzeug==2.1.2
+wrapt==1.14.1

src/main.py

@@ -6,17 +6,11 @@
 # Then we build the API around Flask,
 # Then we build the web interface, using the simple Jinja2 templating.
 
-# We support two modes :
-# The first is a simple mode, where a computer, connected to a thermal printer, runs this program and exposes a web interface that makes use of the client's camera
-# The seconde is booth mode, where a Raspberry Pi is connected to a thermal printer, a button and a flash. The web interface exists but may not be used, as the press of the button with take a picture and activate the flash while simply informing the web page.
-
 # Following are the librairies we import,
 from flask import Flask, request, render_template, flash, abort, redirect, url_for, make_response, jsonify       # Used for the web framework
-from flask_socketio import SocketIO
 from flask_limiter import Limiter
 from flask_limiter.util import get_remote_address
 from printer import Printer             # The wrapper for the printer class
-from raspberry import Raspberry         # The Raspberry pi control Class
 from web import Web                     # Wrapper for the web routes and API
 import toml                             # Used for the config file parsing
 import pprint                           # To pretty print JSON
@@ -25,8 +19,6 @@ import os                               # For VARS from the shell.
 # Variables
 
 app = Flask(__name__)
-socketio = SocketIO(app)
-ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif'}
 
 # Load the configuration file
 try:
@@ -43,7 +35,6 @@ except Exception as e:
     exit(-1)
 
 app.logger.debug("Config file loaded !")
-
 # Define the USB connections here.
 vendor_id = configuration_file["printer"]["vendor_id"]
 device_id = configuration_file["printer"]["device_id"]
@@ -53,12 +44,13 @@ try:
     os.mkdir(UPLOAD_FOLDER)
     app.logger.debug(f"Directory '{UPLOAD_FOLDER}' created successfully.")
 except FileExistsError:
-    app.logger.debug(f"Directory '{UPLOAD_FOLDER}' already exists.")
+    app.logger.error(f"Directory '{UPLOAD_FOLDER}' already exists.")
 except PermissionError:
     app.logger.error(f"Permission denied: Unable to create '{UPLOAD_FOLDER}'.")
 except Exception as e:
     app.logger.error(f"An error occurred: {e}")
 
+ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif'}
 
 # Output the config file
 if os.getenv('LIPY_DEBUG') == True:
@@ -76,28 +68,18 @@ app.config['TEMPLATES_AUTO_RELOAD'] = True
 printer = Printer(app,0x04b8, 0x0e28)
 printer.init_printer()
 
-# Find out if we are running on a Raspberry Pi
-rpi = Raspberry(printer, app, socketio, configuration_file['rpi']['button_gpio_port_number'], configuration_file['rpi']['indicator_gpio_port_number'], configuration_file['rpi']['flash'] )
-RASPBERRY_PI_CONNECTED =  rpi.is_raspberry_pi()
-if RASPBERRY_PI_CONNECTED:
-    rpi.initialise_gpio()
-
-
-#############################################################
-#  Web & API  routes
-#############################################################
-
-
+# Web routes
 web = Web(app, printer)
 
 if __name__ == "__main__":
     app.run(ssl_context='adhoc')
 
+
 limiter = Limiter(
-    get_remote_address,
-    app=app,
+    app,
+    key_func=get_remote_address,
     default_limits=["1500 per day", "500 per hour"]
-    )
+)
 
 @app.route('/')
 @limiter.limit("1/second", override_defaults=False)
@@ -134,12 +116,16 @@ def api_print_sms():
         txt = request.form["txt"]
         sign = request.form["signature"]
     except Exception as e:
-        app.logger.error("Whoops, no forms submitted or missing signature :" + str(e))
-        flash("Whoops, no forms submitted or missing signature : " + str(e))
-        return redirect(url_for("index"))
+        app.logger.error(str(e) + " - Whoops, no forms submitted or missing signature.")
+        return jsonify({'message': 'Error getting the information from the form :' + e}), 500
 
-    web.print_sms(txt,sign)
-    return redirect(url_for("index"))
+    try:
+        web.print_sms(txt,sign)
+    except Exception as e:
+        return jsonify({'message': 'Error printing the SMS:' + e}), 500
+
+
+    return jsonify({'message': 'Message printed'}), 200
 
 @app.route('/api/print/img', methods=['POST'])
 @limiter.limit("6/minute", override_defaults=False)
@@ -149,61 +135,40 @@ def api_print_image():
     try:
         sign = request.form["signature"]
     except Exception as e:
-        app.logger.error("Whoops, no forms submitted or missing signature :" + str(e))
-        flash("Whoops, no forms submitted or missing signature : " + str(e))
-        return redirect(url_for("index"))
-
+        app.logger.error(str(e) + " - Whoops, no forms submitted or missing signature.")
+        return jsonify({'message': 'Error getting the information from the form :' + e}), 500
 
 
     if request.method == 'POST':
         # check if the post request has the file part
         try:
             if 'img' not in request.files:
-                app.logger.error("Whoops, no images submitted  :" + str(e))
-                flash("Whoops, no images submitted  : " + str(e))
+                app.logger.error("No file found. Did you use the good form ?")
+                return jsonify({'message': 'No file found. Did you use the good form ?'}), 500
             else:
                 file = request.files['img']
         except Exception as e:
-            app.logger.error('Error getting the files :' + str(e))
-            flash('Error getting the files :' + str(e))
-            return redirect(url_for("index"))
+            app.logger.error('Error getting the files :' + e)
+            return jsonify({'message': 'Error getting the files :' + e}), 500
 
         # If the user does not select a file, the browser submits an
         # empty file without a filename.
         if file.filename == '':
             app.logger.error("Submitted file has no filename !")
-            flash("Submitted file has no filename !")
-            return redirect(url_for("index"))
-
+            return jsonify({'message': "Submitted file has no filename !" + e}), 500
 
         try:
             app.logger.debug("Sending the image to the printer.")
             web.print_image(file, sign)
         except Exception as e:
-            app.logger.error("The image could not be printed because : " + str(e) )
-            flash("The image could not be printed because : " + str(e))
-            return redirect(url_for("index"))
+            app.logger.error("The image could not be printed : " + e )
+            return jsonify({'message': "The image could not be printed :" + e}), 500
 
     else:
-        app.logger.error("Method not allowed")
-        flash("Method not allowed")
-        return redirect(url_for("index"))
-
-    flash('Picture printed ! '),
-    return redirect(url_for("index"))
-
-
-@app.route('/api/camera/picture')
-def camera_picture():
-    # Returns a picture taken by the camera
-    if RASPBERRY_PI_CONNECTED:
-        try:
-            return rpi.camera_picture()
-        except Exception as e:
-            return jsonify({'message': 'Error getting the stream : ' + e}), 500
-    else:
-        return jsonify({'message': 'No camera present'}), 500
+        return jsonify({'message': "Method Not Allowed, please POST"}), 403
+        app.logger.debug('Bad access type to this API, please POST')
 
+    return jsonify({'message': 'Message printed'}), 200
 
 
 @app.route('/login')
@@ -221,7 +186,7 @@ def logout_page():
 @app.errorhandler(429)
 def ratelimit_handler(e):
     flash("Rate limit reached, please slow down :) ( Currently at "+ e.description + ")", 'error')
-    app.logger.debug('Rate limit reached ' + str(e.description))
+    app.logger.debug('Rate limit reached ' + e)
     return redirect(url_for("index"))
 
 @app.route("/ping")
@@ -230,16 +195,3 @@ def ping():
     flash("🏓 Pong !",'info')
     app.logger.debug('🏓 Pong !')
     return redirect(url_for("index"))
-
-@socketio.on('ping')
-def handle_message(data):
-    app.logger.debug('Received : ' + str(data))
-    socketio.emit('pong',"Pong !")
-
-@socketio.on('get_camera_status')
-def camera_status():
-    app.logger.debug('Client asked if we had a camera')
-    if RASPBERRY_PI_CONNECTED:
-        socketio.emit("camera_status", True)
-    else:
-        socketio.emit("camera_status", False)

src/printer.py

@@ -48,14 +48,16 @@ class Printer(object):
                 self.app.logger.error('Printer has no more paper, aborting...')
                 flash("No more paper on the printer. Sorry.",category='error')
                 self.printer.close()
-                raise Exception("No more paper in the printer")
+                return False
             case 1:
                 self.app.logger.warning('Printer needs paper to be changed very soon ! ')
                 flash('Printer needs paper to be changed very soon ! ', category='info')
                 self.printer.close()
+                return True
             case 2:
                 self.app.logger.debug('Printer has paper, good to go')
                 self.printer.close()
+                return True
 
     def init_printer(self):
 
@@ -97,55 +99,56 @@ class Printer(object):
         self.ready = True;
         self.printer.close();
 
-        self.check_paper()
+        if not self.check_paper():
+            return False
 
         return True
 
-    def print_sms(self, msg, signature) -> None:
+    def print_sms(self, msg, signature) -> bool:
         clean_msg = str(msg)
         clean_signature = str(signature)
 
-        if len(clean_msg) > 4096 or len(clean_msg) < 3 :
+        if not self.check_paper():
+            return False
+
+        if len(clean_msg) > 256 or len(clean_msg) < 3 :
             self.app.logger.warning("Could not print message of this length: " + str(len(clean_msg)))
-            raise Exception("Could not print message of this length :" + str(len(clean_msg)) + ", needs to between 3 and 4096 caracters long.")
+            flash("Could not print message of this length :" + str(len(clean_msg)) + ", needs to between 3 and 256 caracters long.",category='error')
+            return False
 
         if len(signature) > 256 or len(signature) < 3:
-            self.app.logger.warning("Could not print signature of this length: " + str(len(clean_signature)))
-            raise Exception("Could not print signature of this length :" + str(len(clean_signature)) + ", needs to between 3 and 256 caracters long.")
+            self.app.logger.warning("Could not print message without a signature.")
+            flash("Could not print message without a signature.",category='error')
+            return False
 
-        self.check_paper()
-
-        try:
-            self.printer.open(self.usb_args);
-            self.printer.set(align='left', font='a', bold=False, underline=0, width=1, height=1, density=8, invert=False, smooth=True, flip=False, double_width=False, double_height=False, custom_size=False)
-            self.printer.set(align='left', font='a', bold=True, underline=1, width=1, height=1, density=6, invert=False, smooth=True, flip=False, double_width=False, double_height=False, custom_size=False)
-            self.printer.textln(clean_msg)
-            self.printer.textln("")
-            self.printer.set(align='left', font='b', bold=False, underline=1, width=1, height=1, density=9, invert=False, smooth=True, flip=False, double_width=False, double_height=False, custom_size=False)
-            self.printer.textln("> " + clean_signature + " @ " + strftime("%Y-%m-%d %H:%M:%S", gmtime()))
-            self.printer.textln("")
-            self.printer.textln("Printed by LittlePrinter ")
-            self.printer.textln("n07070.xyz/articles/littleprynter")
-            self.printer.textln("")
-            self.printer.cut()
-            self.printer.close()
-        except Exception as e:
-            self.app.logger.error("Unable to print because : " + str(e))
-            raise e
+        if not os.getenv('LIPY_DEBUG') == True:
+            try:
+                self.printer.open(self.usb_args);
+                self.printer.set(align='left', font='a', bold=False, underline=0, width=1, height=1, density=8, invert=False, smooth=True, flip=False, double_width=False, double_height=False, custom_size=False)
+                self.printer.textln(clean_msg)
+                self.printer.set(align='left', font='b', bold=False, underline=1, width=1, height=1, density=9, invert=False, smooth=True, flip=False, double_width=False, double_height=False, custom_size=False)
+                self.printer.textln("> " + clean_signature + " @ " + strftime("%Y-%m-%d %H:%M:%S", gmtime()))
+                self.printer.cut()
+                self.printer.close
+            except Exception as e:
+                flash("Unable to print because : " + e)
 
         flash("Message printed : " + clean_msg ,category='info')
         return True
 
-    def print_img(self, path, sign) -> None:
+    def print_img(self, path, sign):
         clean_signature = str(sign)
 
-        if len(sign) > 256 or len(sign) < 3:
-            self.app.logger.warning("Could not print signature of this length: " + str(len(clean_signature)))
-            raise Exception("Could not print signature of this length :" + str(len(clean_signature)) + ", needs to between 3 and 256 caracters long.")
+        if len(clean_signature) > 256 or len(clean_signature) < 3:
+            self.app.logger.warning("Could not print message without a signature.")
+            flash("Could not print message without a signature.",category='error')
+            return False
+
 
         if not os.path.isfile(str(path)):
             self.app.logger.warning("File does not exist : " + str(path))
-            raise Exception('The file path for this image :' + str(path) + " wasn't found. Please try again.")
+            flash('The file path for this image :' + str(path) + " wasn't found. Please try again.", 'error')
+            return False
         else:
             self.app.logger.debug("Printing file from " + str(path))
 
@@ -153,15 +156,11 @@ class Printer(object):
             self.app.logger.debug("Proccessing the image")
             path = process_image(self, path)
         except Exception as e:
+            flash(str(e))
             self.app.logger.error(str(e))
-            raise e
-
 
         try:
-            self.check_paper()
             self.printer.open(self.usb_args)
-            self.printer.textln("Printed by LittlePrinter ")
-            self.printer.textln("n07070.xyz/articles/littleprynter")
             self.printer.textln("> " + clean_signature + " @ " + strftime("%Y-%m-%d %H:%M:%S", gmtime()))
             self.printer.image(path)
             self.printer.cut()
@@ -169,15 +168,16 @@ class Printer(object):
             self.app.logger.debug("Printed an image : " + str(path))
             os.remove(path)
             self.app.logger.debug("Removed image.")
+            return True
         except Exception as e:
             self.printer.close()
-            self.app.logger.error(str(e))
-            raise e
+            flash(str(e),'error')
+            return False
 
 def process_image(self, path):
     brightness_factor = 1.5  # Used only if image is too dark
-    brightness_threshold = 100  # Brightness threshold (0–255)
-    contrast_factor = 0.6         # Less than 1.0 = lower contrast
+    brightness_threshold = 150  # Brightness threshold (0–255)
+    contrast_factor = 1.2         # Less than 1.0 = lower contrast
     max_width = 575
     max_height = 1000
 

src/raspberry.py

@@ -1,106 +0,0 @@
-from flask_socketio import SocketIO
-from gpiozero import Button, LED
-from time import sleep
-import io                               # To check if we are on a Raspberry Pi
-import subprocess
-
-class Raspberry(object):
-    """
-    This class will manage three things :
-    - Connecting to a USB webcam
-    - Managing a push button
-    - Activating a flash ( or light )
-    - Flash an indicator light
-
-    """
-    def __init__(self, printer, app, socketio, button_gpio_port_number, indicator_gpio_port_number, is_flash_present,):
-        self.printer = printer
-        self.socketio = socketio
-        self.app = app
-
-        self.is_flash_present = is_flash_present
-        self.button_gpio = button_gpio_port_number
-        self.led_gpio = indicator_gpio_port_number
-        self.image_path = self.app.config['UPLOAD_FOLDER'] + '/image.jpg'
-
-    def initialise_gpio(self):
-
-        self.button = Button(self.button_gpio)
-        self.led = LED(self.led_gpio)
-
-        button.when_pressed = self.on_button_pressed()
-
-
-    def is_raspberry_pi(self, raise_on_errors=False):
-        # Check if we are running on a raspberry pi
-        try:
-            with io.open('/proc/cpuinfo', 'r') as cpuinfo:
-                found = False
-                for line in cpuinfo:
-                    if line.startswith('Hardware'):
-                        found = True
-                        label, value = line.strip().split(':', 1)
-                        value = value.strip()
-                        if value not in (
-                            'BCM2708',
-                            'BCM2709',
-                            'BCM2711',
-                            'BCM2835',
-                            'BCM2836'
-                        ):
-                            self.app.logger.debug('This system does not appear to be a Raspberry Pi.')
-                            return False
-
-                if not found:
-                    self.app.logger.error('Couldn\'t get sufficient hardware information from /proc/cpuinfo, Unable to determine if we are on a Raspberry Pi.')
-                    return False
-        except IOError:
-            self.app.logger.error('Unable to open `/proc/cpuinfo`.')
-            return False
-
-        self.app.logger.debug('It seems we are on a Raspberry Pi')
-        return True
-
-    def take_picture(self):
-        # return a path to a picture
-        try:
-            subprocess.run(['fswebcam', '--no-banner', self.image_path])
-        except Exception as e:
-            self.app.logger.error('Unable to take a picture :' + e)
-            raise e
-        return True
-
-    def flash(state):
-        if state:
-            # turn on the flash
-            pass
-        else:
-            # turn off the flash
-            pass
-
-    def flash_indicator(self):
-        # The indicator will flash three times before return true
-        self.led.on()
-        sleep(0.1)
-        self.led.off()
-        sleep(1)
-        self.led.on()
-        sleep(0.1)
-        self.led.off()
-        sleep(1)
-        self.led.on()
-        sleep(0.1)
-        self.led.off()
-
-    def on_button_pressed():
-        self.socketio.emit('button_pressed')  # Notify clients that a button has been pressed on the raspberry pi
-        self.flash_indicator()  # The indicator will flash a countdown LED
-        self.flash(True)
-        try:
-            self.take_picture()
-            self.printer.print_image(self.image_path)
-        except Exception as e:
-            app.logger.error("Could not take a picture after the button press : " + e)
-            self.led.on()
-        self.flash(False)
-        self.socketio.emit('picture_taken')  # Notify clients that a picture has been taken

src/static/js/webcam.js

@@ -1,159 +1,39 @@
 let streaming;
 var current_stream;
 var current_camera_is;
-var supports_facing_mode;
-var camera_options;
 
 var width = document.getElementById("video").parentNode.parentElement.clientWidth;
 var height = width / (4 / 3);
-var socket = io();
 
-socket.on('connect', function() {
-    socket.emit('ping', {data: 'I\'m connected!'});
-    console.log("Sent a ping to the server :)");
-});
-
-
-socket.on('pong', () => {
-  console.log('Received pong back ! ');
-});
-
-socket.on('new_image', () => {
-    console.log("Received new image event");
-    const img = document.getElementById('snapshot');
-    img.src = '/image?' + new Date().getTime();  // Bust cache
-});
-
-
-async function startup(){
+function startup(){
   video = document.getElementById('video');
   canvas = document.getElementById('canvas');
   photo = document.getElementById('photo');
   switch_cameras = document.getElementById('flip')
   printButton = document.getElementById('print_button');
 
-  console.log("Checking for client webcam capabilities");
-  // We have a camera_options dictionnary in return, or false if the device does not support webcams.
-  let client_webcam_capabilities = await check_webcam_capabilies();
-
-
-  if ( client_webcam_capabilities != false ){
-    get_webcam(client_webcam_capabilities);
+  if (check_webcam() === true ){
     setup_events();
     clear_canvas();
   } else {
-    console.log("Checking for server webcam capabilities");
-    let server_webcam_capabilities = await check_server_camera();
-    if (server_webcam_capabilities === true ){
-      console.log("The server has a camera, using it.");
-      console.log("TODO");
-    }
-    else {
-      no_webcam_error();
-      console.log("Seems like it's impossible to get a webcam from the client nor the server.");
-    }
+    no_webcam_error();
+    console.log("Seems like it's impossible to get a webcam.");
   }
 }
 
-async function check_webcam_capabilies(){
-  console.log("Checking for a the capabilities of the client's media devices");
-
-  // We try to start with the front facing camera,
-  // if we have no support, we switch back to a normal camera.
-  try {
-    // We first check if the navigator has a media device
-    if (!navigator.mediaDevices?.enumerateDevices) {
-      console.log("enumerateDevices() not supported.");
-      return false;
-    } else {
-      // List cameras and microphones.
-      console.log("The device has the following media devices : ")
-      await navigator.mediaDevices
-        .enumerateDevices()
-        .then((devices) => {
-          devices.forEach((device) => {
-            console.log(`${device.kind}: ${device.label} id = ${device.deviceId}`);
-          });
-        })
-        .catch((err) => {
-          console.error(`${err.name}: ${err.message}`);
-          return false;
-        });
-    }
-  } catch (e) {
-    console.log("The device does not seem to support webcams " + e);
-    return false;
+function check_webcam(){
+  console.log("Cheking for a camera...");
+  if (get_front_webcam()) {
+    console.log("Got front camera !");
+    return true;
   }
 
-  console.log("Checking for the supported constraints of the media devices ");
-  try {
-    const supports = navigator.mediaDevices.getSupportedConstraints();
-    if (!supports['facingMode']) {
-      throw new Error("This browser does not support facingMode!");
-    } else {
-      console.log("The device supports facing mode, selecting the front camera by default");
-      supports_facing_mode = true;
-      camera_options = {
-        video: {
-           facingMode: 'user', // Or 'environment' if we want a camera facing away
-        },
-        audio: false
-      };
-      return camera_options;
-    }
-  } catch (e) {
-    console.log("Resetting to default camera : " + e);
-    supports_facing_mode = false;
-    camera_options = {
-      video: true,
-      audio: false
-    };
-    return camera_options
+  if (get_any_webcam()) {
+    console.log("Got a webcam !");
+    return true;
   }
-}
-
-async function get_webcam(options){
-  stop_video_streams();
-
-  try {
-    navigator.mediaDevices.getUserMedia(options)
-    .then(function(stream) {
-      // on success, stream it in video tag
-      // the video tag is hidden, as is the canvas.
-      console.log("Got the webcam stream");
-
-      printButton.removeAttribute("disabled","");
-      current_stream = stream;
-      video.srcObject = stream;
-      video.setAttribute('autoplay', '');
-      video.setAttribute('muted', '');
-      video.setAttribute('playsinline', '')
-      video.play();
-      return true;
-    })
-    .catch(function(err) {
-        console.log("Didn't manage to get a camera :" + err);
-        return false;
-    });
-  } catch (err) {
-    console.log("Didn't manage to get a camera :" + err);
-    return false;
-  }
-}
-
-async function check_server_camera(){
-  console.log("Checking for a camera on the server");
-
-  await socket.emit('get_camera_status', (response) => {
-    if (response){
-      console.log("Server has a camera !");
-      return true;
-    } else {
-      console.log("The server doesn't seem to have a camera");
-      return false;
-    }
-  });
-
+  console.log("Nope");
+  return false;
 }
 
 function setup_events(){
@@ -186,7 +66,7 @@ function setup_events(){
   }, false);
 
   switch_cameras.addEventListener('click', function(ev) {
-    flip_cameras(camera_options);
+    flip_cameras();
   }, false );
 
   printButton.addEventListener('click', function(ev){
@@ -244,7 +124,7 @@ function print_picture(data){
   let time = currentDate.getHours() + ":" + currentDate.getMinutes() + ":" + currentDate.getSeconds();
 
   formData.set("img", picture, "picture.png");
-  formData.set("signature", " Accès Libre ~ 1 An ~ Fête de la Musique Libre @ " + time)
+  formData.set("signature", "Printed via the webcam @ " + time)
 
   fetch(url, {
     method: 'POST', // or 'PUT'
@@ -257,9 +137,26 @@ function print_picture(data){
 
 }
 
-function flip_cameras(camera_options){
-  if ( supports_facing_mode ) {
-    get_webcam((camera_options.video.facingMode === 'user' ? 'environment' : 'user'));
+function flip_cameras(){
+  switch (current_camera_is) {
+    case "front":
+      try {
+        get_any_webcam();
+      } catch (e) {
+        console.log("Could not get another camera");
+        get_front_webcam();
+      }
+      break;
+    case "any":
+      try {
+        get_front_webcam();
+      } catch (e) {
+        console.log("Could not get another camera");
+        get_any_webcam();
+      }
+      break;
+    default:
+      console.log("Impossible to switch cameras : none is selected.");
   }
 }
 
@@ -280,6 +177,84 @@ function stop_video_streams(){
   }
 }
 
+async function get_webcam(options){
+  stop_video_streams();
+
+  try {
+    await navigator.mediaDevices.getUserMedia(options)
+    .then(function(stream) {
+      // on success, stream it in video tag
+      // the video tag is hidden, as is the canvas.
+      console.log("Got a camera ( generic )");
+
+      printButton.removeAttribute("disabled","");
+      current_stream = stream;
+      video.srcObject = stream;
+      video.setAttribute('autoplay', '');
+      video.setAttribute('muted', '');
+      video.setAttribute('playsinline', '')
+      video.play();
+      return true;
+    })
+    .catch(function(err) {
+        console.log("Didn't manage to get a camera :" + err);
+        return false;
+    });
+  } catch (err) {
+    console.log("Didn't manage to get a camera :" + err);
+    return false;
+  }
+}
+
+function get_any_webcam(){
+  var camera_options = {
+    video: {
+       facingMode: 'environment', // Or 'environment' if we want a camera facing away
+    },
+    audio: false
+  };
+
+  if(get_webcam(camera_options)){
+    console.log("Got any camera, or environment camera.");
+    current_camera_is = "any";
+    return true;
+  } else {
+    return false;
+  }
+}
+
+function get_front_webcam(){
+  // We try to start with the front facing camera,
+  // if we have no support, we switch back to a normal camera.
+  try {
+    const supports = navigator.mediaDevices.getSupportedConstraints();
+    if (!supports['facingMode']) {
+      throw new Error("This browser does not support facingMode!");
+    } else {
+      var camera_options = {
+        video: {
+           facingMode: 'user', // Or 'environment' if we want a camera facing away
+        },
+        audio: false
+      };
+    }
+  } catch (e) {
+    console.log("Resetting to default camera : " + e);
+    var camera_options = {
+      video: true,
+      audio: false
+    };
+  }
+
+  if(get_webcam(camera_options)){
+    console.log("Got the front camera");
+    current_camera_is = "front";
+    return true;
+  } else {
+    return false;
+  }
+}
+
 function no_webcam_error(){
   console.log("Seems like they is no webcam available.")
 

src/templates/base.html

@@ -56,6 +56,4 @@
         <p class=" text-center">Little Prynter is built by <a href="https://n07070.xyz/about-me/">n07070</a> because it's fun :) | <a href="https://git.n07070.xyz/n07070/littleprynter">Source code - AGPLv3</a></p>
         </footer>
     </body>
-            <script src="https://cdn.socket.io/4.0.0/socket.io.min.js"></script>
-
 </html>

src/templates/webcam.html

@@ -99,7 +99,6 @@
 
 </style>
 
-<script src="https://cdn.socket.io/4.0.0/socket.io.min.js"></script>
 <script type="text/javascript" src="{{ url_for('static',filename='js/webcam.js') }}"></script>
 
 <br>

src/web.py

@@ -1,4 +1,4 @@
-from flask import Flask, request, flash
+from flask import Flask, request
 from werkzeug.utils import secure_filename
 from printer import Printer
 import time
@@ -15,27 +15,28 @@ class Web(object):
     def print_sms(self, texte, sign: str):
         # TODO: verify the texte before printing it here ?
         self.app.logger.debug("Printing : " + str(texte) + " from " + str(sign))
-        try:
-            self.printer.print_sms(texte, sign)
-        except Exception as e:
-            self.app.logger.error(e)
-            flash("Error while printing the SMS : "+ str(e))
+        if not os.getenv('LIPY_DEBUG'):
+            time.sleep(1)
 
-        flash("You message has been printed :)")
+        return self.printer.print_sms(texte, sign)
 
-
-    def print_image(self, image, sign: str):
+    def print_image(self, image, sign: str) -> bool:
         self.app.logger.debug("Uploading file")
         try:
             self.app.logger.debug("Uploading file from " + str(sign))
             if self.upload_file(image):
                 self.app.logger.debug("File has been uploaded, printing...")
                 self.printer.print_img(os.path.join(self.app.config['UPLOAD_FOLDER'], secure_filename(image.filename)), sign)
+                return True
+            else:
+                return False
         except Exception as e:
             self.app.logger.error(e)
-            flash("Could not upload file." + str(e))
+            raise Exception
 
-        flash("Your image has been printed :)")
+        else:
+            flash("Could not upload file.",'error')
+            return False
 
     def login(username: str,password: str) -> bool:
         pass