Communication Of iPhone and Google App Engine

How can I get a pdf data (stored in datastore as blob) from iphone if i make a request to google app engine?

When I use self.response.out.write('asadasd'); in google app engine code I can see this 'asadasd' in iPhone.

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But i don't know how to set this communication so that i can get a pdf data from i phone.

Thanks in advance!

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If I understand corretly, you want to send an pdf file to a webapplication, right? I think it would be a solution to base64 code the binary data of the pdf on the iphone (that comes from your blob) and then send it via http post to the webapplication.

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You should set the proper headers before writing to the output stream:

self.response.headers['Content-Type'] = 'application/pdf'
self.response.headers['Content-Disposition'] = 'attachment;filename=filename.pdf'
self.response.out.write(...)