MATLAB: Matlab GZIP http postrequest

gziphttpMATLAB

Hi Guys,
I want to send a reasonably large matrix (120 * 10000) over http, encoded as JSON.
request =
RequestMessage with properties:
Method: POST
RequestLine: 'POST'
Header: [1×3 matlab.net.http.HeaderField]
Body: [1×1 matlab.net.http.MessageBody]
Completed: 0
It's very slow,m in fact, slow enough that the server never actually finishes getting the request. I believe the best way to speed it up, would be to gzip the request body….
Can matlab do this?
Simon

Best Answer

This example of outrageous hackery does appear to do the job. A bit stinky though...
myJson = jsonencode(toSend);
outStream= java.io.ByteArrayOutputStream();
gzipped = java.util.zip.GZIPOutputStream(outStream);
gzipped.write( uint8(myJson));
gzipped.close();
closedBytes = outStream.toByteArray();
messageBody.Payload = typecast (closedBytes, 'uint8');
request.Header.addFields(...
matlab.net.http.field.GenericField('Content-Encoding', 'gzip'), ...
matlab.net.http.field.ContentTypeField('application/json'))
response = send(request, uri, opts);
% To decode the stream to check ...
% someStream = java.io.ByteArrayInputStream(typecast( messageBody.Payload , 'int8'));
% gzipInStream = java.util.zip.GZIPInputStream( someStream );
% inReader = java.io.InputStreamReader(gzipInStream, 'UTF-8');
%

% aTest = char();
%
% data=inReader.read;
% while data ~=-1
% aTest = [aTest, char(data)];
% data = inReader.read;
% end