How the Google App Engine's Blobstore Java API works?

Question

How the google app engine blobstore service working with file upload of 32 MB without any TimeOut Exception. Also it will not affect app engine's request-response interval of one minute.What kind of process is going behind it.

Answer 1

When using the blobstore to upload data you upload the data into a special system handler that will load the data save it in the blobstore and when finished redirect to the user handler while providing a reference to to the location in the blobstore of the uploaded data.