Convert PDF to any with Google Drive API

Question

I'm trying to convert PDF to any allowed format but response does not content exportLinks after a pdf file was uploaded.

I've already tried many ways to manage for to get exportLinks. Other doc formats can be uploaded and be exported successfully. I have used code from developers.google.com.

media_body = MediaFileUpload(filename, mimetype=mime_type, resumable=False)
body = {'title': title,
        'description': description,
        'mimeType': mime_type,
        }
# Set the parent folder.
if parent_id:
    body['parents'] = [{'id': parent_id}]

try:
    request = service.files().insert(body=body, media_body=media_body)
    #request.uri = "%s&convert=true&ocr=true" % request.uri
    #request.uri = "%s&convert=true" % request.uri
    request.uri = "https://www.googleapis.com/upload/drive/v2/files?uploadType=multipart&alt=json&convert=true"
    logger.debug("Request: %s", request.uri)
    file_obj = request.execute()
    # Uncomment the following line to print the File ID
    # print 'File ID: %s' % file_obj['id']
    import json
    logger.debug('Get file result: %s' % json.dumps(file_obj, indent=4))
    return file_obj

...
export_links = source_file.get('exportLinks')
if not export_links:
    logger.debug('Warning: exportLinks does not exist')

Why there is no exportLinks in the PDF upload's response?

Please, Google Team agree that PDF can be uploaded and exported by Drive API.

Thanks

[UPD] Here is a request dump of Httplib2. As I see query is set properly according to manual.

Request: https://www.googleapis.com/upload/drive/v2/files?uploadType=multipart&alt=json&convert=true
send: 'POST /upload/drive/v2/files?uploadType=multipart&alt=json&convert=true HTTP/1.1\r\n
Host: www.googleapis.com\r\n
content-length: 4425\r\n
accept-encoding: gzip, deflate\r\n
accept: application/json\r\n
user-agent: google-api-python-client/1.0\r\n
content-type: multipart/related; boundary="===============0758269123680398078=="\r\n
authorization: Bearer ya29.AHES6ZRDT0AJX8a5JN_u_0epF6ZCMGcqwyru1wzj22oVlMO9CfmFzlo\r\n
\r\n
--===============0758269123680398078==\nContent-Type: application/json\nMIME-Version: 1.0\n\n{"mimeType": "application/pdf", "description": "", "title": "Short_pdf.pdf"}\n--===============

Here is a downloadLink in the response: "downloadUrl": "https://doc-0c-2c-docs.googleusercontent.com/docs/securesc/2sgoib42bclb5coaj85g5574fd2b65bn/2lnqk989jdaepp4b8igdco1j8fu7m9l3/1373040000000/00639208221381605991/00639208221381605991/0By108D1dgCDkX0NFOXV0V2pNd2s?h=16653014193614665626&e=download&gd=true",

Answer 1

Unfortunately Google Drive does not provide conversion capabilities for PDF files through the Google Drive API.

Only Google native documents (Google Docs/Sheets/Slides/Drawings) have exportLinks allowing to download the Google document in multiple export formats. All other files - regular files basically such as PDF, images etc... - have a downloadUrl instead which allows you to download the file itself in its original format.