how can I reuse http connection when use webread to avoid server time wait?

I use webread to get data from server. When I do it in parfor mode, it makes the remote server generate many timewait event. The reason is everytime, the webread open a port and request data and close it. The server cannot handle too many close requests at the same time. I want keep the port open to frequently read data from url

how can I reuse http connection when use webread to avoid server time wait?

aa=webread('http://172.16.2.1:5010/DFS/TNode/File?fileName=G0002-1/H02/2018/10/44/38/4a3cc8f1-b48f-40df-96b1-5d1e452fd63c',options);

for example, in python, I can do:

con = http.client.HTTPConnection("172.16.2.1", 5010)
while True:
    con.request("GET", "/DFS/TNode/File?fileName=G0002-1/H02/2018/10/44/38/4a3cc8f1-b48f-40df-96b1-5d1e452fd63c", headers={"Connection":" keep-alive"})
    result = con.getresponse()
    result.read()
    print(result.reason, result.getheaders())

and there is no time wait event

[Guofeng]

Have you deal with your problem？I have the same problem but do not konw how to speed the function time.

[laroq]

Same problem as you. Webread and urlread2 don't support connection reuse. Need a third party tool to feed the data to Matlab.

Answer 1

[Mohammad Sami]

You will need to rely on java to accomplish this. A simple script to open a network connection and read from it is as follows.

url = java.net.URL(url);

HttpURLConnection = url.openConnection();

%connect_time_out = 60;
%HttpURLConnection.setConnectTimeout(connect_time_out);

httpcode = HttpURLConnection.getResponseCode;
ins = HttpURLConnection.getInputStream();

% copy the input stream into an output. you can directly read the input stream as well
output = java.io.ByteArrayOutputStream();
org.apache.commons.io.IOUtils.copy(ins,output);
output.flush();
string_output = char(output.toString);
output.close();
ins.close();