Hello, I have a system with client-server architecture. The client is actually some java code and the server is some python code running in GAE. When i need to query the kind (table) i defined in GAE data store, i actually call a java function and it takes the query (e.g select * from Person where age < 90) and send the query to the server (some python code) through a http request. The server get and run the query and finally generate the whole result tuples. Then the whole result tuples will be sent back by server through a http response to the client. Finally the client will print out the result tuples.
As you can see, the whole system architecture is just that the client sends a http request with query and the server returns the query result in just a http response. However, this will not work when the result tuples are too big (e.g 500MB data) so that a http response can not bring the whole result tuples back to the client. I have two ideas for this problems: 1 Let the client recursively sending the query and cursor information through a http request to server and the server generates partial result tuples for every http request and returns the partial result tuples back to the client through a http response. As you can imagine, there will be many http requests sending from client and many http response sending back from the server. 2 Let the client sending the query only once to server and the server recursively generate partial result tuples each time and send these partial result tuples back to client. As you can imagine, there will be just one http request sending from client and many http response sending back to the server. Actually the server streams the partial result tuples to the client. I prefer to implement the second idea. However, the second idea seems impossible to be implemented because the GAE document says "App Engine does not support sending data to the user's browser before exiting the handler. Some web servers use this technique to "stream" data to the user's browser over a period of time in response to a single request. App Engine does not support this streaming technique." The quote is from http://code.google.com/appengine/docs/python/runtime.html. Now i can only implement the first idea. Do you have other good suggestions, ideas for me? You can of course correct me if you feel i misunderstand the GAE document that i quote. Thank you very much for your valuable views. Bruce -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
