* Ported from NodeJS to Python

* Migrated to libfprint-2

app.py

@@ -0,0 +1,149 @@
+import eventlet
+import socketio
+import uuid
+import base64
+
+import gi
+gi.require_version("FPrint", "2.0")
+gi.require_version("Gio", "2.0")
+from gi.repository import FPrint, GLib, Gio
+
+
+sio = socketio.Server()
+static_files = {
+    '/assets': './public',
+    '/': {'filename': './public/index.html'}
+}
+app = socketio.WSGIApp(sio, static_files=static_files)
+
+stopEnrollment = False
+def progress(device, completed_stages, prnt, sessionId, error):
+    print({'completedStages': completed_stages, 'sessionId': sessionId})
+    global stopEnrollment
+    if (error):
+        stopEnrollment = True
+        print({'error': error})
+    else:
+        if (completed_stages == 5):
+            if (not stopEnrollment):
+                sio.emit("fprint-enroll-status", { 'stage': completed_stages }, room=sessionId)
+            else:
+                print('Completed with an error.')
+
+def enroll(sessionId, data):
+    ctx = FPrint.Context()
+    devices = ctx.get_devices()
+    if (len(devices) == 0):
+        print("There is no attached device.")
+    else:
+        device = devices[0]
+        if (not device):
+            print("There is no attached device")
+
+        if (not device.is_open()):
+            device.open_sync()
+            while (not device.is_open()):
+                print('Opening...') 
+    try:
+        prt = FPrint.Print.new(device)
+        prt = device.enroll_sync(prt, None, progress_cb=progress, progress_data=sessionId)
+        img = prt.serialize()
+        sio.emit('fprint-enroll-done', { 'ok': True, "fingerprint": base64.b64encode(img).decode('utf-8'), 'id': str(uuid.uuid4()), 'data': data })
+        with open('adebisi-fa.jpg', 'w+b') as f:
+            f.write(img)
+    except Exception as e:
+        print({'error': e});
+        sio.emit('fprint-enroll-done', { 'ok': False, 'message': e})
+    finally:
+        device.close_sync()
+
+def open_dev(sessionId):
+    device = None;
+    ctx = FPrint.Context()
+    devices = ctx.get_devices()
+    if (len(devices) == 0):
+        print("There is no attached device.")
+    else:
+        device = devices[0]
+        if (not device):
+            print("There is no attached device")
+
+        if (not device.is_open()):
+            device.open_sync()
+            while (not device.is_open()):
+                print('Opening...') 
+    return device
+                
+def verify(sessionId, data):
+    ctx = FPrint.Context()
+    devices = ctx.get_devices()
+    if (len(devices) == 0):
+        print("There is no attached device.")
+    else:
+        device = devices[0]
+        if (not device):
+            print("There is no attached device")
+
+        if (not device.is_open()):
+            device.open_sync()
+            while (not device.is_open()):
+                print('Opening...') 
+
+        with open('adebisi-fa.jpg', 'r+b') as f:
+            img = f.read()
+            prtRecord = FPrint.Print.deserialize(img)
+        canceller = Gio.Cancellable.new()
+        (match, prtFound) = device.verify_sync(prtRecord, canceller, None)
+        if (match):
+            sio.emit('fprint-verify-done', { 'ok': True, 'data': data }, room=sessionId)
+        else:
+            sio.emit('fprint-verify-done', { 'ok': False }, room=sessionId)
+        device.close_sync()
+
+def verify_short(sessionId, data):
+    d = open_dev(sessionId)
+    with open('adebisi-fa.jpg', 'r+b') as f:
+        img = f.read()
+        prtRecord = FPrint.Print.deserialize(img)
+    (match, print) = d.verify_sync(prtRecord, None, None)
+    if (match):
+        sio.emit('fprint-verify-done', { 'ok': True, 'data': data }, room=sessionId)
+    else:
+        sio.emit('fprint-verify-done', { 'ok': False }, room=sessionId)
+    d.close_sync()
+
+# events
+
+@sio.on("fprint-verify")
+def fprint_verify(sid, data):
+    verify_short(sid, data)
+    pass
+
+@sio.on("fprint-enroll")
+def fprint_enroll(sid, data):
+    print('Enrolling {}'.format(data['finger']))
+    enroll(sid, data)
+    pass
+
+@sio.event
+def capture(sid, data):
+    print(data)
+    pass
+
+@sio.event
+def connect(sid, data):
+    # print({ 'sid': sid, 'event': 'connect', 'data': data});
+    pass
+
+@sio.event
+def disconnect(sid):
+    print({ 'sid': sid, 'event': 'disconnect'});
+    pass
+
+
+@sio.on('capture-other')
+def capture_other(sid, data):
+    print({ "event": "capture_other", "data": data })
+    pass
+
+eventlet.wsgi.server(eventlet.listen(('127.0.0.1', 9000), reuse_port=False), app)