Create app.py

app.py

@@ -0,0 +1,46 @@
+from flask import Flask, request, send_file, jsonify
+from flask_cors import CORS
+import fitz  # PyMuPDF
+import os
+import tempfile
+
+app = Flask(__name__)
+CORS(app)
+
+def compress_pdf(input_path, output_path, target_size_kb):
+    doc = fitz.open(input_path)
+    doc.save(output_path, garbage=4, deflate=True)
+    doc.close()
+
+    current_size_kb = os.path.getsize(output_path) / 1024
+    # Optionally, reprocess or notify if size is still too big
+    return current_size_kb <= target_size_kb + 50  # allow a little leeway
+
+@app.route("/compress", methods=["POST"])
+def compress():
+    if 'pdf' not in request.files:
+        return jsonify({"error": "No PDF uploaded"}), 400
+
+    target_size = request.form.get("target_size")
+    if not target_size:
+        return jsonify({"error": "Target size not specified"}), 400
+
+    try:
+        target_kb = float(target_size)
+    except ValueError:
+        return jsonify({"error": "Invalid target size"}), 400
+
+    pdf = request.files['pdf']
+    with tempfile.NamedTemporaryFile(delete=False, suffix=".pdf") as input_file:
+        pdf.save(input_file.name)
+
+    output_path = input_file.name.replace(".pdf", "_compressed.pdf")
+    success = compress_pdf(input_file.name, output_path, target_kb)
+
+    if not success:
+        return jsonify({"error": "Unable to meet target size"}), 500
+
+    return send_file(output_path, as_attachment=True, download_name="compressed.pdf")
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=7860)