first commit

Dockerfile

@@ -0,0 +1,13 @@
+FROM python:3.13-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]

app.py

@@ -0,0 +1,123 @@
+from flask import Flask, request, jsonify
+import os
+import threading
+import queue
+import pdf2image
+from brother_ql.conversion import convert
+from brother_ql.backends.helpers import send
+from brother_ql.raster import BrotherQLRaster
+from PIL import Image
+import mimetypes
+
+app = Flask(__name__)
+
+# Create a queue to hold the files for processing
+file_queue = queue.Queue()
+
+# Directory to save uploaded files (you can modify this path)
+UPLOAD_FOLDER = './uploads'
+os.makedirs(UPLOAD_FOLDER, exist_ok=True)
+
+# Printer configuration
+printer_model = "QL-1100"
+backend = 'pyusb'
+printer = 'usb://0x04f9:0x20a7'
+
+# Convert PDF to image
+def convert_pdf_to_image(pdf_path):
+    """Converts a PDF to a PIL Image"""
+    try:
+        # Convert PDF to image (get the first page)
+        images = pdf2image.convert_from_path(pdf_path)
+        if images:
+            return images[0]  # We will only print the first page for now
+        return None
+    except Exception as e:
+        print(f"Error converting PDF: {str(e)}")
+        return None
+
+# Function to print address labels
+def print_address_label(pdf_path):
+    try:
+        # Convert PDF to image
+        image = convert_pdf_to_image(pdf_path)
+        if not image:
+            raise Exception("Failed to create label images")
+    
+        target_width = 1164
+        target_height = 1660
+        image = image.convert("RGB")
+        image = image.resize((target_width, target_height), Image.LANCZOS)
+        
+        qlr = BrotherQLRaster(printer_model)
+        qlr.exception_on_warning = True
+
+        print("Converting image to printer instructions...")
+        instructions = convert(
+            qlr=qlr,
+            images=[image],  # Pass as a list with the single image
+            label='102x152',
+            threshold=70.0,
+            dither=False,
+            compress=False,
+            red=False,
+            dpi_600=False,
+            hq=True,
+            cut=True
+        )
+
+        print("Sending to printer...")
+        send(
+            instructions=instructions, 
+            printer_identifier=printer, 
+            backend_identifier=backend, 
+            blocking=True
+        )
+        print("Print job sent successfully")
+        
+    except Exception as e:
+        print(f"Error during printing: {str(e)}")
+
+# Worker thread that processes files from the queue
+def process_queue():
+    while True:
+        # Wait until a file is available in the queue
+        file_path = file_queue.get()
+        if file_path is None:  # Shutdown signal
+            break
+        # Process the file (convert and print)
+        print_address_label(file_path)
+        # Signal that the task is done
+        file_queue.task_done()
+
+# Start the worker thread
+thread = threading.Thread(target=process_queue, daemon=True)
+thread.start()
+
+@app.route('/upload', methods=['POST'])
+def upload_file():
+    # Check if a file is part of the request
+    if 'file' not in request.files:
+        return jsonify({'error': 'No file part'}), 400
+    
+    file = request.files['file']
+    
+    if file.filename == '':
+        return jsonify({'error': 'No selected file'}), 400
+
+    # Check file type (ensure it's a PDF)
+    mime_type, _ = mimetypes.guess_type(file.filename)
+    if mime_type != 'application/pdf':
+        return jsonify({'error': 'Only PDF files are allowed'}), 400
+
+    # Save the file to the uploads folder
+    file_path = os.path.join(UPLOAD_FOLDER, file.filename)
+    file.save(file_path)
+
+    # Add the file path to the queue for processing
+    file_queue.put(file_path)
+
+    return jsonify({'message': f'File {file.filename} uploaded and queued for processing'}), 200
+
+if __name__ == '__main__':
+    app.run(debug=True)

requirements.txt

@@ -0,0 +1,18 @@
+attrs==25.3.0
+blinker==1.9.0
+brother_ql_next==0.11.3
+click==8.1.8
+Flask==3.1.0
+future==1.0.0
+h11==0.14.0
+itsdangerous==2.2.0
+Jinja2==3.1.6
+jsons==1.6.3
+MarkupSafe==3.0.2
+packbits==0.6
+pdf2image==1.17.0
+pillow==11.1.0
+pyusb==1.3.1
+typish==1.9.3
+uvicorn==0.34.0
+Werkzeug==3.1.3