Initial commit v2

v2/png_creator.py

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+#!/usr/bon/env python
+
+from PIL import Image
+
+import socket
+import random
+import time
+
+HOST, PORT = "localhost", 9999
+
+nb_images = 10
+
+for i in range(nb_images):
+    r = random.randint(0, 255)
+    g = random.randint(0, 255)
+    b = random.randint(0, 255)
+    img1 = Image.new('RGBA', (100, 100), (r, g, b, 128))
+    data = img1.tobytes()
+
+    try:
+        # Create a socket (SOCK_STREAM means a TCP socket)
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.connect((HOST, PORT))
+
+        # Connect to server and send data
+        sock.sendall(bytes(data))
+        time.sleep(2)
+
+    finally:
+        sock.close()

v2/png_merger.py

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+#!/usr/bon/env python
+
+from PIL import Image
+
+import redis
+import datetime
+import time
+
+
+def merge(r):
+    if not r.exists('new'):
+        return None
+    now = datetime.datetime.now().isoformat()
+    r.rename('new', now)
+    new_imgs = r.smembers(now)
+    print('got new images', len(new_imgs))
+    r.delete(now)
+    if len(new_imgs) == 1:
+        image = Image.frombytes('RGBA', (100, 100), list(new_imgs)[0])
+        image.save(now + '.png', 'png')
+    else:
+        images = []
+        for i in new_imgs:
+            try:
+                images.append(Image.frombytes('RGBA', (100, 100), i))
+            except:
+                continue
+            if len(images) == 2:
+                img_alpha = Image.alpha_composite(*images)
+                images = [img_alpha]
+        img_alpha.save(now + '.png', 'png')
+
+
+if __name__ == "__main__":
+    r = redis.Redis()
+    while True:
+        merge(r)
+        time.sleep(10)

v2/readme.md

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+Installation
+============
+
+```
+    pip install -r requirements.txt
+```
+
+Usage
+=====
+
+Run the listener receiving the images from the clients:
+
+```
+    python receiver.py
+```
+
+Run the script merging the images:
+
+```
+    python png_merger.py
+```
+
+Run the scripts sending the images:
+
+```
+    python png_creator.py
+```

v2/receiver.py

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+#!/usr/bon/env python
+
+import socketserver
+import redis
+
+
+class MyTCPHandler(socketserver.BaseRequestHandler):
+    """
+    The RequestHandler class for our server.
+
+    It is instantiated once per connection to the server, and must
+    override the handle() method to implement communication to the
+    client.
+    """
+
+    def handle(self):
+        r = redis.Redis()
+        data = None
+        while True:
+            temp = self.request.recv(1024).strip()
+            if data is None:
+                data = temp
+            else:
+                data += temp
+            if len(temp) == 0:
+                break
+        print("{} sent a packet".format(self.client_address[0]))
+        r.sadd('new', data)
+
+
+if __name__ == "__main__":
+    HOST, PORT = "localhost", 9999
+
+    # Create the server, binding to localhost on port 9999
+    server = socketserver.TCPServer((HOST, PORT), MyTCPHandler)
+
+    # Activate the server; this will keep running until you
+    # interrupt the program with Ctrl-C
+    server.serve_forever()

v2/requirements.txt

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+redis
+pillow