fix: notebook should detect mime type (#9)

Author: nicoloboschi

src/examples/notebooks/vectorize.ipynb

@@ -192,9 +192,10 @@
   {
    "cell_type": "code",
    "source": [
-    "import urllib3, json, os\n",
+    "import urllib3, json, os, mimetypes\n",
     "http = urllib3.PoolManager()\n",
     "file_path = \"apple.pdf\"\n",
+    "content_type, _ = mimetypes.guess_type(file_path)\n",
     "\n",
     "uploads_api = v.UploadsApi(api)\n",
     "\n",
@@ -203,13 +204,13 @@
     "upload_response = uploads_api.start_file_upload_to_connector(\n",
     "        org, source_connector_id, v.StartFileUploadToConnectorRequest(\n",
     "            name=file_path.split(\"/\")[-1],\n",
-    "            content_type=\"application/pdf\",\n",
+    "            content_type=content_type,\n",
     "            # add additional metadata that will be stored along with each chunk in the vector database\n",
     "            metadata=json.dumps(metadata))\n",
     ")\n",
     "\n",
     "with open(file_path, \"rb\") as f:\n",
-    "    response = http.request(\"PUT\", upload_response.upload_url, body=f, headers={\"Content-Type\": \"application/pdf\", \"Content-Length\": str(os.path.getsize(file_path))})\n",
+    "    response = http.request(\"PUT\", upload_response.upload_url, body=f, headers={\"Content-Type\": content_type, \"Content-Length\": str(os.path.getsize(file_path))})\n",
     "if response.status != 200:\n",
     "    print(\"Upload failed: \", response.data)\n",
     "else:\n",
@@ -547,12 +548,10 @@
   {
    "cell_type": "code",
    "source": [
-    "from pathlib import Path\n",
     "import urllib3, os\n",
     "\n",
     "files_api = v.FilesApi(api)\n",
     "\n",
-    "content_type=\"application/pdf\"\n",
     "file_path=\"apple.pdf\"\n",
     "\n",
     "start_file_upload_response = files_api.start_file_upload(org, start_file_upload_request=v.StartFileUploadRequest(\n",