Update app.py

app.py

@@ -1,12 +1,7 @@
 import gradio as gr
 from PIL import Image, ImageStat
 from fpdf import FPDF
-import os
-
-# Directory temporanea sicura
-TMP_DIR = "/tmp"
-if not os.path.exists(TMP_DIR):
-    os.makedirs(TMP_DIR)
+import io
 
 # -----------------------------
 # EURISTIC AI DETECTOR
@@ -38,23 +33,31 @@ def generate_heatmap(image, score):
     return Image.alpha_composite(base, overlay)
 
 # -----------------------------
-# PDF sicuro
+# PDF in-memory (funziona HF Spaces)
 # -----------------------------
 def create_pdf(image, text):
     pdf = FPDF()
     pdf.add_page()
     pdf.set_font("Arial", size=12)
     pdf.multi_cell(0, 6, txt=text)
-    
-    # Salva immagine temporanea su disco
-    temp_img_path = os.path.join(TMP_DIR, "temp_image.png")
-    image.convert("RGB").save(temp_img_path)
+
+    # Convert image in RGB e salva in BytesIO
+    buf_img = io.BytesIO()
+    image.convert("RGB").save(buf_img, format="PNG")
+    buf_img.seek(0)
+
+    # Salva immagine nel PDF usando fpdf
+    temp_img_path = "/tmp/temp_image.png"
+    with open(temp_img_path, "wb") as f:
+        f.write(buf_img.read())
     pdf.image(temp_img_path, x=10, y=pdf.get_y()+10, w=180)
 
-    # Salva PDF finale su disco temporaneo
-    pdf_path = os.path.join(TMP_DIR, "report.pdf")
-    pdf.output(pdf_path)
-    return pdf_path  # Faccio tornare il path reale, Gradio File lo legge
+    # Salva PDF in BytesIO per Gradio
+    pdf_bytes = io.BytesIO()
+    pdf.output(pdf_bytes)
+    pdf_bytes.seek(0)
+    pdf_bytes.name = "report.pdf"  # GRADIO richiede .name per scaricare
+    return pdf_bytes
 
 # -----------------------------
 # FUNZIONE PRINCIPALE
@@ -77,10 +80,11 @@ def check_image(image):
             "- Metadata EXIF presente\n"
         )
         reliability = "Alta"
+
     output_text = f"{explanation}Score AI stimato: {score:.1f}%\nLivello affidabilità: {reliability}"
     heatmap = generate_heatmap(image, score)
-    pdf_path = create_pdf(image, output_text)
-    return heatmap, output_text, pdf_path
+    pdf = create_pdf(image, output_text)
+    return heatmap, output_text, pdf
 
 # -----------------------------
 # INTERFACCIA GRADIO
@@ -96,7 +100,7 @@ iface = gr.Interface(
     title="💎 Image Trust Checker 2026 (Stable Version)",
     description=(
         "Analizza un'immagine per determinare quanto è affidabile.\n"
-        "Basato su euristiche open-source, PDF e heatmap completamente compatibili con HF Spaces."
+        "Basato su euristiche open-source, heatmap e PDF compatibili con HF Spaces."
     ),
 )