Matlab GZIP http postrequest

Question

Simon Parten 2018-11-28

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/432595-matlab-gzip-http-postrequest

回答： Simon Parten 2018-12-4

采纳的回答： Simon Parten

在 MATLAB Online 中打开

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

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Answer 1

Simon Parten 2018-12-4

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/432595-matlab-gzip-http-postrequest#answer_350416

在 MATLAB Online 中打开

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