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I have a site done in Rails, which uses javascript to load files and generate forms for the user to input certain information. Those files and parameters are then to be used in a fortran code on the server.

When the UI was on the server (using Qt), I would create a parameters file and execute the fortran code using threads so I wouldn't block the computer.

Now that is web-based, I need to make the server and browser talk. What's the procedure for that? where should I start looking? I'm already using rails + javascript. I need that extra tool to do the talking, and no idea where to start.

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if you wanted to make an html button execute the command ls on the server, would you do it with JQuery? I got to JQuery looking for Ajax info –  jbcolmenares Oct 19 '12 at 9:10
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JQuery is a great JavaScript framework for sending requests to servers from inside the browser. It's industry standard and very easy to use. –  Jimmy Hoffa Oct 19 '12 at 15:08

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