Update little printer requirements

src/web.py

@@ -1,4 +1,4 @@
-from flask import Flask, request
+from flask import Flask, request, flash
 from werkzeug.utils import secure_filename
 from printer import Printer
 import time
@@ -15,28 +15,27 @@ 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))
-        if not os.getenv('LIPY_DEBUG'):
-            time.sleep(1)
+        try:
+            self.printer.print_sms(texte, sign)
+        except Exception as e:
+            self.app.logger.error(e)
+            flash("Error while printing the SMS : "+ str(e))
 
-        return self.printer.print_sms(texte, sign)
+        flash("You message has been printed :)")
 
-    def print_image(self, image, sign: str) -> bool:
+
+    def print_image(self, image, sign: str):
         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
+            flash("Could not upload file." + str(e))
 
-        else:
-            flash("Could not upload file.",'error')
-            return False
+        flash("Your image has been printed :)")
 
     def login(username: str,password: str) -> bool:
         pass