Move JS to another file, added printing from webcam

requirements.txt

@@ -1,13 +1,31 @@
-Adafruit-Thermal>=1.1.0
+Adafruit-Thermal==1.1.0
-Click>=7.0
+appdirs==1.4.4
-Flask>=1.0.2
+argcomplete==2.0.0
-Flask-Limiter>=1.0.1
+click==8.1.3
-itsdangerous>=0.24
+commonmark==0.9.1
-Jinja2>=2.10
+Deprecated==1.2.13
-limits>=1.3
+escpos==1.9
-MarkupSafe>=1.0
+Flask==2.1.2
-Pillow>=5.3.0
+Flask-Limiter==2.4.5.1
-pyserial>=3.4
+future==0.18.2
-six>=1.11.0
+itsdangerous==2.1.2
-Unidecode>=1.0.22
+Jinja2==3.1.2
-Werkzeug>=0.14.1
+limits==2.6.1
+MarkupSafe==2.1.1
+packaging==21.3
+Pillow==9.1.0
+Pygments==2.12.0
+pyparsing==3.0.8
+pyserial==3.5
+python-barcode==0.13.1
+pyusb==1.2.1
+PyYAML==6.0
+qrcode==7.3.1
+rich==12.4.1
+six==1.16.0
+toml==0.10.2
+typing_extensions==4.2.0
+Unidecode==1.3.4
+viivakoodi==0.8.0
+Werkzeug==2.1.2
+wrapt==1.14.1

run.sh

@@ -1,3 +1,7 @@
+virtualenv .
+
+pip install -r requirements.txt
+
 export FLASK_APP=src/main.py
 export FLASK_ENV=development
 flask run --host 192.168.0.42 --debugger --eager-loading

src/main.py

@@ -122,17 +122,24 @@ def api_print_image():
         sign = request.form["signature"]
     except Exception as e:
         flash(str(e),'error')
-        redirect(url_for('index'))
+        app.logger.error(str(e) + " - Whoops, no forms submitted or missing signature.")
+        return redirect(url_for('index'))
 
     if request.method == 'POST':
         # check if the post request has the file part
-
+        try:
             if 'img' not in request.files:
                 flash('No file found. Did you use the good form ?', 'error')
+                app.logger.error("No file found. Did you use the good form ?")
                 return redirect(url_for("index"))
             else:
                 file = request.files['img']
-
+        except Exception as e:
+            if sign is not None and photo is not None:
+                pass
+            else:
+                flash(str(e), 'error')
+                app.logger.error("Couldn't get an image nor signature : " + str(e))
 
         # If the user does not select a file, the browser submits an
         # empty file without a filename.

src/static/js/webcam.js

@@ -0,0 +1,160 @@
+let streaming;
+var width = document.getElementById("video").parentNode.parentElement.clientWidth;
+var height = width / (4 / 3);
+
+function startup(){
+  video = document.getElementById('video');
+  canvas = document.getElementById('canvas');
+  photo = document.getElementById('photo');
+  switch_cameras = document.getElementById('flip')
+  printButton = document.getElementById('print_button');
+
+  if ( check_webcam() ){
+    setup_events();
+    clear_canvas();
+  } else {
+    console.log("Seems like it's impossible to get a webcam.");
+  }
+}
+
+function check_webcam(){
+  try {
+    // access video stream from webcam
+    navigator.mediaDevices.getUserMedia({
+           video: true,
+           audio: false
+       })
+       // on success, stream it in video tag
+       // the video tag is hidden, as is the canvas.
+       .then(function(stream) {
+          switch_cameras.removeAttribute("disabled","");
+
+           video.srcObject = stream;
+           video.play();
+       })
+       .catch(function(err) {
+           console.log("An error occurred: " + err);
+
+       });
+  } catch (err) {
+    console.log("An error occurred: " + err);
+    console.log("Seems like they is no webcam available.")
+
+    // We disable the print button is it cannot be clicked.
+    printButton.setAttribute("disabled","");
+
+    // We create an alert message.
+    const frame_div = document.getElementById("image_dither");
+    frame_div.removeAttribute('class');
+
+    const alert_div = document.createElement("div");
+    alert_div.setAttribute("class", "alert alert-warning");
+    alert_div.setAttribute("role", "alert");
+
+    var alert_message = document.createTextNode("We where unable to get a Webcam device, this page will not work.");
+    alert_div.appendChild(alert_message);
+    frame_div.appendChild(alert_div);
+    console.log("Should be a new div somewhere");
+    throw new Error("Unable to get a video device, stopping the photobooth.");
+  } finally {
+
+
+  }
+  return true;
+}
+
+function setup_events(){
+
+  // When the video is ready, we start streaming it to the canvas.
+  // The canvas is hidden, but it still exists in the browser.
+  video.addEventListener('canplay', function(ev) {
+      if (!streaming) {
+          height = video.videoHeight / (video.videoWidth / width);
+
+          if (isNaN(height)) {
+              height = width / (4 / 3);
+          }
+
+          video.setAttribute('width', width);
+          video.setAttribute('height', height);
+          canvas.setAttribute('width', width);
+          canvas.setAttribute('height', height);
+
+          photo.setAttribute('width', width);
+          photo.setAttribute('height', height);
+
+
+          streaming = true;
+          printButton.removeAttribute("disabled","");
+
+      }
+  }, false);
+
+  switch_cameras.addEventListener('click', function(ev) {
+    alert("Just turn your phone.");
+  }, false );
+
+  printButton.addEventListener('click', function(ev){
+    data = take_picture();
+    print_picture(data)
+    ev.preventDefault();
+  }, false);
+
+}
+
+function clear_canvas() {
+    var context = canvas.getContext('2d');
+    context.fillStyle = "#AAA";
+    context.fillRect(0, 0, canvas.width, canvas.height);
+
+    var data = canvas.toDataURL('image/png');
+    photo.setAttribute('src', data);
+}
+
+function dataURLtoFile(dataurl, filename) {
+  var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
+      bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
+  while(n--){
+      u8arr[n] = bstr.charCodeAt(n);
+  }
+  return new File([u8arr], filename, {type:mime});
+}
+
+function take_picture(){
+  var context = canvas.getContext('2d');
+  if (width && height) {
+      canvas.width = width;
+      canvas.height = height;
+      context.drawImage(video, 0, 0, width, height);
+
+      var data = canvas.toDataURL('image/png');
+      photo.setAttribute('src', data);
+  } else {
+      clear_canvas();
+  }
+
+  return data;
+}
+
+function print_picture(data){
+  var url = "/api/print/img"
+  var picture = dataURLtoFile(data);
+  const formData = new FormData();
+  let currentDate = new Date();
+  let time = currentDate.getHours() + ":" + currentDate.getMinutes() + ":" + currentDate.getSeconds();
+
+  formData.set("img", picture, "picture.png");
+  formData.set("signature", "Printed via the webcam @ " + time)
+
+  fetch(url, {
+    method: 'POST', // or 'PUT'
+    body: formData,
+    // headers:{
+    //   'Content-Type': 'multipart/form-data'
+    // }
+  }).then(response => console.log('Success:', response), true)
+  .catch(error => console.error('Error:', error), false);
+
+}
+
+window.addEventListener('load', startup, false);

src/templates/base.html

@@ -51,7 +51,9 @@
 
         {% endblock %}
         <hr>
-        <footer>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/src/branch/epson-tm-t20iii">Source code - AGPLv3</a></footer>
+
-      </div>
+        <footer class="row">
+        <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>
 </html>

src/templates/index.html

@@ -5,11 +5,9 @@
     <div class="card">
       <h3 class="card-header">Print a short message</h3>
       <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" 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>
@@ -26,5 +24,5 @@
           <input class="btn btn-primary float-right" type="submit" value="Imprimer" name="imprimer">
         </form>
       </div>
-
+    </div>
     {% endblock %}

src/templates/webcam.html

@@ -2,13 +2,40 @@
 
 {% block content %}
 
+			<noscript class="d-block">
+
+			<div class="alert alert-warning " role="alert">
+
+
+   <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-bug-fill" viewBox="0 0 16 16">
+  <path d="M4.978.855a.5.5 0 1 0-.956.29l.41 1.352A4.985 4.985 0 0 0 3 6h10a4.985 4.985 0 0 0-1.432-3.503l.41-1.352a.5.5 0 1 0-.956-.29l-.291.956A4.978 4.978 0 0 0 8 1a4.979 4.979 0 0 0-2.731.811l-.29-.956z"/>
+  <path d="M13 6v1H8.5v8.975A5 5 0 0 0 13 11h.5a.5.5 0 0 1 .5.5v.5a.5.5 0 1 0 1 0v-.5a1.5 1.5 0 0 0-1.5-1.5H13V9h1.5a.5.5 0 0 0 0-1H13V7h.5A1.5 1.5 0 0 0 15 5.5V5a.5.5 0 0 0-1 0v.5a.5.5 0 0 1-.5.5H13zm-5.5 9.975V7H3V6h-.5a.5.5 0 0 1-.5-.5V5a.5.5 0 0 0-1 0v.5A1.5 1.5 0 0 0 2.5 7H3v1H1.5a.5.5 0 0 0 0 1H3v1h-.5A1.5 1.5 0 0 0 1 11.5v.5a.5.5 0 1 0 1 0v-.5a.5.5 0 0 1 .5-.5H3a5 5 0 0 0 4.5 4.975z"/>
+</svg>
+		  This page will need Javascript and your authorization to use the webcam to work. It is not possible because Javascript seems to be deactived on this page.
+
+</div>
+			</noscript>
+
 <div class="card">
   <h3 class="card-header">Photomaton</h3>
   <div class="card-body row">
 
     <canvas id="canvas"></canvas>
     <video id="video" class="align-self-center">Video stream not available.</video>
-    <div class="image_dither">
+		<div class="row align-self-center">
+			<button class=" btn btn-primary" name="print_picture" id="print_button" disabled="">
+				<svg xmlns="http://www.w3.org/2000/svg" width="54" height="54" fill="currentColor" class="bi bi-printer" viewBox="0 0 16 16">
+					<path d="M2.5 8a.5.5 0 1 0 0-1 .5.5 0 0 0 0 1z"/>
+					<path d="M5 1a2 2 0 0 0-2 2v2H2a2 2 0 0 0-2 2v3a2 2 0 0 0 2 2h1v1a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2v-1h1a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2h-1V3a2 2 0 0 0-2-2H5zM4 3a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1v2H4V3zm1 5a2 2 0 0 0-2 2v1H2a1 1 0 0 1-1-1V7a1 1 0 0 1 1-1h12a1 1 0 0 1 1 1v3a1 1 0 0 1-1 1h-1v-1a2 2 0 0 0-2-2H5zm7 2v3a1 1 0 0 1-1 1H5a1 1 0 0 1-1-1v-3a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1z"/>
+				</svg>
+			</button>
+			<button class=" btn btn-secondary" name="flip" id="flip" disabled="">
+				<svg xmlns="http://www.w3.org/2000/svg" width="54" height="54" fill="currentColor" class="bi bi-arrow-repeat" viewBox="0 0 16 16">
+	  <path d="M11.534 7h3.932a.25.25 0 0 1 .192.41l-1.966 2.36a.25.25 0 0 1-.384 0l-1.966-2.36a.25.25 0 0 1 .192-.41zm-11 2h3.932a.25.25 0 0 0 .192-.41L2.692 6.23a.25.25 0 0 0-.384 0L.342 8.59A.25.25 0 0 0 .534 9z"/>
+	  <path fill-rule="evenodd" d="M8 3c-1.552 0-2.94.707-3.857 1.818a.5.5 0 1 1-.771-.636A6.002 6.002 0 0 1 13.917 7H12.9A5.002 5.002 0 0 0 8 3zM3.1 9a5.002 5.002 0 0 0 8.757 2.182.5.5 0 1 1 .771.636A6.002 6.002 0 0 1 2.083 9H3.1z"/>
+	</svg>
+			</button>
+    <div class="image_dither" id="image_dither">
       <picture>
         <img id="photo" class="align-self-center">
       </picture>
@@ -17,32 +44,22 @@
 
   <hr>
 
-  <!-- <div class="row row-cols-2"> -->
+
-      <!-- <button class="align-self-center col-3 btn btn-danger" name="take_picture" id="startbutton">
+
-        <svg xmlns="http://www.w3.org/2000/svg" width="54" height="54" fill="currentColor" class="bi bi-camera" viewBox="0 0 16 16">
-          <path d="M15 12a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1V6a1 1 0 0 1 1-1h1.172a3 3 0 0 0 2.12-.879l.83-.828A1 1 0 0 1 6.827 3h2.344a1 1 0 0 1 .707.293l.828.828A3 3 0 0 0 12.828 5H14a1 1 0 0 1 1 1v6zM2 4a2 2 0 0 0-2 2v6a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V6a2 2 0 0 0-2-2h-1.172a2 2 0 0 1-1.414-.586l-.828-.828A2 2 0 0 0 9.172 2H6.828a2 2 0 0 0-1.414.586l-.828.828A2 2 0 0 1 3.172 4H2z"/>
-          <path d="M8 11a2.5 2.5 0 1 1 0-5 2.5 2.5 0 0 1 0 5zm0 1a3.5 3.5 0 1 0 0-7 3.5 3.5 0 0 0 0 7zM3 6.5a.5.5 0 1 1-1 0 .5.5 0 0 1 1 0z"/>
-        </svg>
-      </button>
-      <br><br> -->
-      <button class="align-self-center col-3 btn btn-danger" name="print_picture" id="print_button">
-        <svg xmlns="http://www.w3.org/2000/svg" width="54" height="54" fill="currentColor" class="bi bi-printer" viewBox="0 0 16 16">
-          <path d="M2.5 8a.5.5 0 1 0 0-1 .5.5 0 0 0 0 1z"/>
-          <path d="M5 1a2 2 0 0 0-2 2v2H2a2 2 0 0 0-2 2v3a2 2 0 0 0 2 2h1v1a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2v-1h1a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2h-1V3a2 2 0 0 0-2-2H5zM4 3a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1v2H4V3zm1 5a2 2 0 0 0-2 2v1H2a1 1 0 0 1-1-1V7a1 1 0 0 1 1-1h12a1 1 0 0 1 1 1v3a1 1 0 0 1-1 1h-1v-1a2 2 0 0 0-2-2H5zm7 2v3a1 1 0 0 1-1 1H5a1 1 0 0 1-1-1v-3a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1z"/>
-        </svg>
-      </button>
 <!-- </div> -->
 
 	</div>
 
+</div>
+
 <style media="screen">
   canvas {
     display: none;
   }
 
-  video {
+  /* video {
     display: none;
-  }
+  } */
 
   .image_dither {
     /* width: 300px;
@@ -80,106 +97,7 @@
 
 </style>
 
-<script type="text/javascript">
+<script type="text/javascript" src="{{ url_for('static',filename='js/webcam.js') }}"></script>
-  let streaming;
-  var width = document.getElementById("video").parentNode.parentElement.clientWidth;
-  var height = width / (4 / 3);
-  function startup() {
-    video = document.getElementById('video');
-    canvas = document.getElementById('canvas');
-    photo = document.getElementById('photo');
-    printButton = document.getElementById('print_button');
-
-    // access video stream from webcam
-    navigator.mediaDevices.getUserMedia({
-            video: true,
-            audio: false
-        })
-        // on success, stream it in video tag
-        // the video tag is hidden, as is the canvas.
-        .then(function(stream) {
-            video.srcObject = stream;
-            video.play();
-        })
-        .catch(function(err) {
-            console.log("An error occurred: " + err);
-        });
-
-    video.addEventListener('canplay', function(ev) {
-        if (!streaming) {
-            height = video.videoHeight / (video.videoWidth / width);
-
-            if (isNaN(height)) {
-                height = width / (4 / 3);
-            }
-
-            video.setAttribute('width', width);
-            video.setAttribute('height', height);
-            canvas.setAttribute('width', width);
-            canvas.setAttribute('height', height);
-
-            photo.setAttribute('width', width);
-            photo.setAttribute('height', height);
-
-
-            streaming = true;
-        }
-    }, false);
-
-    printButton.addEventListener('click', function(ev){
-      data = takepicture();
-      printPicture(data)
-      ev.preventDefault();
-
-    }, false)
-
-}
-
-  function clearphoto() {
-      var context = canvas.getContext('2d');
-      context.fillStyle = "#AAA";
-      context.fillRect(0, 0, canvas.width, canvas.height);
-
-      var data = canvas.toDataURL('image/png');
-      photo.setAttribute('src', data);
-  }
-
-  function takepicture() {
-      var context = canvas.getContext('2d');
-      if (width && height) {
-          canvas.width = width;
-          canvas.height = height;
-          context.drawImage(video, 0, 0, width, height);
-
-          var data = canvas.toDataURL('image/png');
-          photo.setAttribute('src', data);
-      } else {
-          clearphoto();
-      }
-
-      return data;
-  }
-
-  function printPicture(data){
-      var url = "/api/print/img"
-      var picture = data;
-      const formData = new FormData();
-
-      formData.append("file", picture);
-
-      fetch(url, {
-        method: 'POST', // or 'PUT'
-        body: formData,
-        headers:{
-          'Content-Type': 'multipart/form-data'
-        }
-      }).then(response => console.log('Success:', response), true)
-      .catch(error => console.error('Error:', error), false);
-
-    }
-
-  window.addEventListener('load', startup, false);
-</script>
 
 <br>