Issue sending a huge amount of data from flash

Question

I'm having an issue sending a huge (~4MB) block of data from flash, to my java servlet, currently I'm transferring the data using URLVariables, however it seems there's a limit to this (because it seems to work, with smaller data blocks), how do I suppress this limit, or in any other way, get my data to my servlet.

My flash code so far:

var variables:URLVariables = new URLVariables();
variables.name = name_string; //Plenty of these small attributes
variables.data = data_string; //And the huge BLOB

var sendReq:URLRequest = new URLRequest("http://localhost:8080/recieve/");
sendReq.method = URLRequestMethod.POST;
sendReq.data = variables;

var sendLoader:URLLoader;
sendLoader = new URLLoader();
sendLoader.addEventListener(Event.COMPLETE, Handler);
sendLoader.dataFormat = URLLoaderDataFormat.VARIABLES;
sendLoader.load(sendReq);

@@John, can you post an answer, showing some example code of this, where data_string is a huge data_string. — Skeen, Sep 14 '11 at 15:40
@@John, it's actually a BitmapData object, that is encoded into a string, I guess the encoding could happen server-side, if that would ease solving the sending issue. - So SWF local memory I guess. — Skeen, Sep 14 '11 at 16:00
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/3447/discussion-between-john-giotta-and-skeen) — John Giotta, Sep 14 '11 at 16:09

score 0 · Answer 1 · answered May 02 '14 at 00:17

This sounds more like an issue on the server side. Check your java environment settings and increase the maximum allowed POST/Request size.

The solution of breaking the data into multiple parts and sending them separately probably only works because each part is smaller than the server-side limit.

score 0 · Answer 2 · edited May 23 '17 at 11:57

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First, All POST methods fail at around 2000+ characters in IE (at-least prior to 8).

Next, there is a limit to the URLLoader: see Flash/AS3 - is there a limit to the number of simultaneous URLLoader.load() requests?

If possible, try breaking your data up into smaller pieces and sending it that way. This will eliminate the maximum problems.

edited May 23 '17 at 11:57

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answered Sep 14 '11 at 15:13

Todd Moses

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I think that the character limit is set at the server. – Amy Blankenship Sep 15 '11 at 11:28
If so Amy, how would I change this in my java servlet? – Skeen Sep 15 '11 at 12:57

score 0 · Answer 3 · edited May 23 '17 at 11:57

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After looking into it, my earlier suggestion, FileReference, is a bad idea given the BitmapData is created within memory.

I will suggest trying How can I send a ByteArray (from Flash) and some form data to php?

edited May 23 '17 at 11:57

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answered Sep 15 '11 at 14:45

John Giotta

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score 0 · Accepted Answer · answered Sep 15 '11 at 18:51

So after playing around with flash, I came up with a solution;

I simply broke the data_string into sub-strings of a given size, then enumerating these, and transferring each of these using the URLLoader, along with a part_id.

The collection of the sub-strings is then done at server-side, by the part_ids.

Issue sending a huge amount of data from flash

4 Answers4