Limit to Data with GetFileTablePreview?

[jonvitale]

Is anyone familiar with the App Engine API function GetFileTablePreview?

I am using it to load the data from an external file. This works for the most part, but I noticed that for any given field with a long string it will only load 500 characters.

Here is the result of a load with an "Lorem ipsum..." value, 1000 words long. In the array I only see 500 characters of the text (the screenshot doesn't show it all).

Is there any way to override this limitation? The function is called a "preview", so perhaps it isn't designed for full data loads. Is there a better way to get an external file with the App Engine API?

Jonathan