deploy(S4): Blender headless pipeline + WebAR client + backend fixes

backend/tools/xr_tools.py

@@ -1,5 +1,23 @@
 import logging
 
+# Wikimedia (and several other image CDNs) reject the default
+# "Python-urllib/3.x" User-Agent with HTTP 403 Forbidden. urllib.request
+# .urlretrieve() cannot carry headers, so every image fetch below goes through
+# this helper instead — this was the real cause of SF3D model generation
+# failing with {"detail":"HTTP Error 403: Forbidden"}: the Wikipedia *API* call
+# set a User-Agent, but the follow-up image *download* did not.
+IMAGE_FETCH_UA = "JARVIS_OMEGA/1.0 (+https://huggingface.co/spaces/Jarvis2345/jarvis-cloud)"
+
+
+def _download_image(url: str, dest_path: str, timeout: int = 30) -> str:
+    """Download `url` to `dest_path` with a real User-Agent. Returns dest_path."""
+    import urllib.request
+    req = urllib.request.Request(url, headers={"User-Agent": IMAGE_FETCH_UA})
+    with urllib.request.urlopen(req, timeout=timeout) as resp, open(dest_path, "wb") as fh:
+        fh.write(resp.read())
+    return dest_path
+
+
 async def xr_anchor_tool(action: str, anchor_id: str = "", *args, **kwargs):
     """
     Control or query XR spatial anchors.
@@ -85,8 +103,9 @@ async def search_web_for_image(description: str) -> str | None:
                     if "original" in page_data:
                         img_url = page_data["original"]["source"]
                         tmp = tempfile.NamedTemporaryFile(suffix=".jpg", delete=False)
-                        urllib.request.urlretrieve(img_url, tmp.name)
-                        return tmp.name
+                        tmp.close()
+                        # UA-bearing fetch: Wikimedia 403s the default urllib UA.
+                        return _download_image(img_url, tmp.name)
         except Exception as e:
             logging.error(f"Web image search failed: {e}")
         return None
@@ -110,8 +129,10 @@ async def pollinations_generate_image(description: str) -> str:
         url = f"https://image.pollinations.ai/prompt/{prompt}?width=1024&height=1024&nologo=true"
         try:
             tmp = tempfile.NamedTemporaryFile(suffix=".jpg", delete=False)
-            urllib.request.urlretrieve(url, tmp.name)
-            return tmp.name
+            tmp.close()
+            # Pollinations renders on demand — allow a longer timeout, and send a
+            # real User-Agent (bare urlretrieve 403s on several image CDNs).
+            return _download_image(url, tmp.name, timeout=120)
         except Exception as e:
             logging.error(f"AI image generation failed: {e}")
             raise e