Added printing images

.gitignore

@@ -62,6 +62,7 @@ db.sqlite3
 # Flask stuff:
 instance/
 .webassets-cache
+src/static/uploads
 
 # Scrapy stuff:
 .scrapy

configuration/config.toml

@@ -4,6 +4,7 @@
 [printer]
 vendor_id = 0x04b8
 device_id = 0x0e28
+upload_folder = "src/static/uploads"
 
 # Users = Password
 [users]

src/main.py

@@ -18,30 +18,39 @@ import time                             # To sleep
 import os                               # For VARS from the shell.
 # Variables
 
+app = Flask(__name__)
+
 # Load the configuration file
 try:
+    app.logger.debug("Loading config file...")
     configuration_file = toml.load("configuration/config.toml")
 except TypeError :
-    print("Unable to load the config file: invalid type or is a list containing invalid types")
+    app.logger.error("Unable to load the config file: invalid type or is a list containing invalid types")
     exit(-1)
 except toml.TomlDecodeError:
-    print("An error occured while decoding the file")
+    app.logger.error("An error occured while decoding the file")
     exit(-1)
 except Exception as e:
-    print("Error while loading file : " + str(e))
+    app.logger.error("Error while loading file : " + str(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"]
+UPLOAD_FOLDER = str(configuration_file["printer"]["upload_folder"])
+
+ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif'}
 
 # Output the config file
 if os.getenv('LIPY_DEBUG') == True:
     pprint.pprint(configuration_file)
 
 # We define the app module used by Flask
-app = Flask(__name__)
 app.secret_key = configuration_file["secrets"]["flask_secret_key"]
-
+app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
+app.config['ALLOWED_EXTENSIONS'] = ALLOWED_EXTENSIONS
+app.config['MAX_CONTENT_LENGTH'] = 3 * 1000 * 1000 # Maximum 3Mb for a file upload
 
 # Printer connection
 # Uses the class defined in the printer.py file
@@ -61,6 +70,7 @@ limiter = Limiter(
 @app.route('/')
 @limiter.limit("1/second", override_defaults=False)
 def index():
+    app.logger.debug("Loading index")
     return render_template('index.html')
 
 # API routes
@@ -74,17 +84,19 @@ def index():
 @app.route('/api/print')
 @limiter.limit("1/second", override_defaults=False)
 def api_index():
+    app.logger.debug("Loading API")
     return render_template("api.html")
 
 
 @app.route('/api/print/sms', methods=['POST'])
 @limiter.limit("2/minute", override_defaults=False)
 def api_print_sms():
+    app.logger.debug("Printing an sms")
     try:
         txt = request.form["txt"]
         sign = request.form["signature"]
     except Exception as e:
-        flash(e)
+        flash(e,'error')
         redirect(url_for('index'))
 
     try:
@@ -94,30 +106,64 @@ def api_print_sms():
 
     return redirect(url_for('index'))
 
-@app.route('/api/print/image', methods=['POST'])
+@app.route('/api/print/img', methods=['POST'])
 @limiter.limit("2/minute", override_defaults=False)
 def api_print_image():
-    flash(web.print_image())
-    return "print image"
+    app.logger.debug("Printing an image")
+
+    try:
+        sign = request.form["signature"]
+    except Exception as e:
+        flash(str(e),'error')
+        redirect(url_for('index'))
+
+    if request.method == 'POST':
+        # check if the post request has the file part
+
+        if 'img' not in request.files:
+            flash('No file found. Did you use the good form ?', 'error')
+            return redirect(url_for("index"))
+        else:
+            file = request.files['img']
+
+
+        # 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('No file submitted, please select a file','error')
+            return redirect(url_for("index"))
+
+        try:
+            app.logger.debug("Sending the image to the printer.")
+            web.print_image(file, sign)
+        except Exception as e:
+            pass
+    else:
+        flash('Cannot access to page with this method.','error')
+        app.logger.debug('Bad access type to this API.')
+
+    return redirect(url_for("index"))
 
 @app.route('/login')
 @limiter.limit("1/second", override_defaults=False)
 def login_page():
     # web.login(username,password)
-    return render_template("index.html")
+    return redirect(url_for("index"))
 
 @app.route('/logout')
 @limiter.limit("1/second", override_defaults=False)
 def logout_page():
     # web.logout(username, password)
-    return render_template("index.html")
+    return redirect(url_for("index"))
 
 @app.errorhandler(429)
 def ratelimit_handler(e):
     flash("Rate limit reached, please slow down :) ( Currently at "+ e.description + ")", 'error')
-    return render_template('index.html')
+    return redirect(url_for("index"))
 
 @app.route("/ping")
 @limiter.exempt
 def ping():
-    return "PONG"
+    flash("🏓 Pong !",'info')
+    return redirect(url_for("index"))

src/printer.py

@@ -3,6 +3,7 @@ from flask import flash
 from escpos.printer import Usb, USBNotFoundError
 from time import sleep, gmtime, strftime
 import os.path
+from PIL import Image
 
 
 class Printer(object):
@@ -134,19 +135,44 @@ class Printer(object):
         flash("Message printed : " + clean_msg ,category='info')
         return True
 
-    def print_img(self, path):
+    def print_img(self, path, sign):
+        clean_signature = str(sign)
 
-        if os.path.isfile(str(path)):
-            pass
-        else:
+        if not os.path.isfile(str(path)):
             self.app.logger.warning("File does not exist : " + str(path))
+            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))
+
+
+
+        try:
+            self.app.logger.debug("Resizing the image")
+            with Image.open(path) as im:
+
+                basewidth = 575
+                img = Image.open(path)
+                wpercent = (basewidth/float(img.size[0]))
+                hsize = int((float(img.size[1])*float(wpercent)))
+                img = img.resize((basewidth,hsize), Image.ANTIALIAS)
+                if img.height > 1000:
+                    flash("Image is too long, sorry ! Keep it below 500×1000 pixels.",'error')
+                    return False
+                img.save(path)
+        except Exception as e:
+            flash(str(e))
+            self.app.logger.error(str(e))
 
         try:
             self.printer.open(self.usb_args)
+            self.printer.textln("> " + clean_signature + " @ " + strftime("%Y-%m-%d %H:%M:%S", gmtime()))
             self.printer.image(path)
+            self.printer.cut()
             self.printer.close()
+            self.app.logger.debug("Printed an image : " + str(path))
+            return True
         except Exception as e:
             self.printer.close()
-            return e
-        else:
-            self.app.logging.debug("Printed an image : " + str(path))
+            flash(str(e),'error')
+            return False

src/templates/index.html

@@ -9,15 +9,15 @@
         <link rel="stylesheet" href="{{ url_for('static',filename='css/style.css') }}">
     </head>
     <body class="container">
-        <div class="col-md-6 offset-md-3">
-            <img class="rounded" width="100px" src="{{ url_for('static', filename='images/little-printer.png') }}" alt="LittlePrynter icon"><h1 class="card-title font-weight-bold">Little Prynter</h1>
+        <div class="col-md-7 offset-md-2">
+            <a href="/"><img class="rounded" width="100px" src="{{ url_for('static', filename='images/little-printer.png') }}" alt="LittlePrynter icon"></a><h1 class="card-title font-weight-bold">Little Prynter</h1>
             <hr>
             <div class="alert alert-dark" role="alert">LittlePrynter is under heavy developpement, you may encounter bugs ! If so, try again. Thanks !</div>
             <br>
             {% with messages = get_flashed_messages(category_filter=('error')) %}
               {% if messages %}
                 {% for message in messages %}
-                  <div class="alert alert-danger" role="alert">{{ message }}</div>
+                  <div class="alert alert-danger" role="alert">⚠️ {{ message }}</div>
                 {% endfor %}
               {% endif %}
             {% endwith %}
@@ -25,7 +25,7 @@
             {% with messages = get_flashed_messages(category_filter=('info')) %}
               {% if messages %}
                 {% for message in messages %}
-                  <div class="alert alert-info" role="alert">{{ message }}</div>
+                  <div class="alert alert-info" role="alert">ℹ️ {{ message }}</div>
                 {% endfor %}
               {% endif %}
             {% endwith %}
@@ -40,20 +40,30 @@
               <div class="card-body">
 
                 <form class="form-group" action="/api/print/sms" method="post">
-                  <input class="form-control" type="text" name="txt" placeholder="200 chars or less " maxlength="200"><br>
-                  <input class="form-control" type="text" name="signature" placeholder="Signature or pseudo" maxlength="200"><br>
+                  <input class="form-control" type="text" name="txt" placeholder="200 chars or less " maxlength="200" required><br>
+                  <input class="form-control" type="text" name="signature" placeholder="Signature or pseudo" maxlength="200" required><br>
 
                   <input class="btn btn-primary float-right" type="submit" value="Imprimer" name="imprimer">
                 </form>
               </div>
+            </div>
 
-              <div id="pbar" style="display:none">
+            <br>
+
+            <div class="card">
+                <h3 class="card-header">Print an image</h3>
+                <div class="card-body">
+                  <form enctype="multipart/form-data" class="form-group" action="/api/print/img" method="post">
+                    <input class="form-control" type="file" name="img" required><br>
+                    <input class="form-control" type="text" name="signature" placeholder="Signature or pseudo" maxlength="200" required><br>
+                    <input class="btn btn-primary float-right" type="submit" value="Imprimer" name="imprimer">
+                  </form>
+                </div>
+
+              <!-- <div id="pbar" style="display:none">
                 <img src="{{ url_for('static',filename='load.gif') }}" alt="loading wheel">
+              </div> -->
             </div>
-
-            </div>
-            <br>
-            <br>
             <hr>
             <footer>Little Prynter is built by <a href="https://n07070.xyz/about-me/">n07070</a> for fun :) </footer>
         </div>

src/web.py

@@ -1,4 +1,5 @@
 from flask import Flask, request
+from werkzeug.utils import secure_filename
 from printer import Printer
 import time
 import os
@@ -19,11 +20,49 @@ class Web(object):
 
         return self.printer.print_sms(texte, sign)
 
-    def print_image(self, image):
-        pass
+    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)
+            raise Exception
+
+        else:
+            flash("Could not upload file.",'error')
+            return False
 
     def login(username: str,password: str) -> bool:
         pass
 
     def logout(username: str, password: str) -> bool:
         pass
+
+    def allowed_file(self, filename) -> bool:
+        self.app.logger.debug("Is the filename allowed ?")
+        return '.' in filename and filename.rsplit('.', 1)[1].lower() in self.app.config['ALLOWED_EXTENSIONS']
+
+    def upload_file(self, image)-> bool:
+        self.app.logger.debug("Validating file")
+        if image and self.allowed_file(image.filename):
+            filename = secure_filename(image.filename)
+            self.app.logger.debug("File valid")
+            try:
+                image.save(os.path.join(self.app.config['UPLOAD_FOLDER'], filename))
+                self.app.logger.debug("File saved")
+            except Exception as e:
+                self.app.logger.error("Could not save file")
+                flash(e,'error')
+                return False
+
+            self.app.logger.debug("File saved to " + str(os.path.join(self.app.config['UPLOAD_FOLDER'], filename)))
+            return True
+        else:
+            self.app.logger.error("Could not save file " + str(filename))
+            return False