Oh and in case you were asking about *client-side* rejecting possibilities,
I don't care about those much as I don't think they are 100% bullet-proof.
One better not trust anything that comes from a web-browser. :)

2010/5/10 Jaroslav Záruba <[email protected]>

> I'm Java-guy...
> ...so I would 'route' the uploads to my own request in which I would check
> what 'content-length' header of the incoming request contains. If it
> exceeded the limit I would reject that request by sending proper HTTP-status
> and returning without fetching the post data. If the content-length was OK I
> would call createUploadUrl and either a) forwarded the request to that
> address, which is easier or b) open a URLConnection and copy the POST-data
> data into it, which lets you write to response.
> This is how I actually do it on my app, save for the content-length check
> as I don't let upload anyone else..
>
> On Mon, May 10, 2010 at 5:58 PM, Massimiliano <
> [email protected]> wrote:
>
>> how I can reject the upload? I don't want to start the upload, but display
>> a message error.
>>
>> Massimiliano
>>
>> 2010/5/10 Jaroslav Záruba <[email protected]>
>>
>> 1) Enabling billing does not mean your free quote goes away. I have
>>> billing enabled and I'm still in "a free mode". (I'm still in the dev. phase
>>> with my project anyways.)
>>>
>>> 2) As for limiting uploads: You can hide the uploadUrl behind your own
>>> servlet and reject uploads over limit within it. Or you can let user upload
>>> whole file and delete it in the successUrl-servlet afterwards.
>>>
>>> Regards
>>>   J. Záruba
>>>
>>> On Mon, May 10, 2010 at 5:45 PM, Massimiliano <
>>> [email protected]> wrote:
>>>
>>>> Dear all,
>>>> first of all: *"**You must have billing enabled in your app to use the
>>>> Blobstore." *Is this still true? Is my free quota 1 giga?
>>>> I don't want to enable billing, as this is a hobby, I'm not an IT.
>>>>
>>>> Second I want my users to upload image, but I want to limit them with
>>>> file not lager than a specific quota. How can I do this?
>>>>
>>>> Regards
>>>>
>>>> Massimiliano
>>>>
>>>> --
>>>>
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>>
>>
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