Downloaded filename with Google App Engine Blobstore

Question

I\'m using the Google App Engine Blobstore to store a range of file types (PDF, XLS, etc) and am trying to find a mechanism by which the original filename of the uploaded file -

Answer 1

There is an optional 'save_as' parameter in the send_blob function. By default this is set to False. Setting it to True will cause the file to be treated as an attachment (ie it will trigger a 'Save/Open' download dialog) and the user will see the proper filename.

Example:

class ServeHandler(blobstore_handlers.BlobstoreDownloadHandler):
    def get(self, resource):
        resource = str(urllib.unquote(resource))
        blob_info = blobstore.BlobInfo.get(resource)
        self.send_blob(blob_info,save_as=True)

It is also possible to overwrite the filename by passing in a string:

self.send_blob(blob_info,save_as='my_file.txt')

If you want some content (such as pdfs) to open rather than save you could use the content_type to determine the behavior:

blob_info = blobstore.BlobInfo.get(resource)
type = blob_info.content_type
if type == 'application/pdf':       
    self.response.headers['Content-Type'] = type
    self.send_blob(blob_info,save_as=False)
else:
    self.send_blob(blob_info,save_as=True)