Matlab, Julia and HTTP

The bridge speaks HTTP/JSON: besides Python there are ready clients for Matlab/Octave and Julia, and any language can use the protocol directly. In every case, first run the bridge (python -m magfem --key KEY) and connect the page through Local script.

Matlab / Octave

Copy bridge/matlab/MagFEM.m to your path:

mf = MagFEM('KEY');                % port 8765
mf.set_var('g', '0.5 mm');
mf.solve();
fx = mf.result('Fx');
[t, i] = mf.series('Primary_I');
mf.run('g.circle((0, 0), r=5)');   % any console line

Errors become error('MagFEM:run', ...). Tested with Octave 9.2.

Julia

bridge/julia/MagFEM.jl uses HTTP.jl and JSON3.jl (] add HTTP JSON3):

include("MagFEM.jl"); using .MagFEM
mf = MagFEM.Client("KEY")
MagFEM.set_var(mf, "g", "0.5 mm")
MagFEM.solve(mf)
fx = MagFEM.result(mf, "Fx")
t, i = MagFEM.series(mf, "Primary_I")

Tested with Julia 1.10.

HTTP protocol

Route	Does
`GET /status`	`{"browser": true/false, "version": "..."}` (no key)
`POST /run`	runs console lines; body `{"code": "..."}` and header `X-MagFEM-Key: KEY`

The /run response carries ok, value (the value of the last line), out (outputs) and, on error, error and line:

curl -s -X POST http://127.0.0.1:8765/run -H "X-MagFEM-Key: KEY" \
     -d '{"code": "s.solve()\nr.result(\"Fx\")"}'
# {"ok": true, "value": -9.97, "out": []}

Lines run in order; meshing and solving finish before the next line.