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Click New/Javascript File.
Enter the code below. Click Save As, and save as pjstips_02_3.js.

Code Block

language	js

function app(req, res) {
  
  // When a PJS module is called as an Express Route (web service), two objects
  // are passed to the module.
  // 1. The "request" object, named as "req" here. You can use another name if you want.
  // 2. The "response" object, named as "res" here. You can use another name if you want.

  // Put this module in debug and call it from a browser. Then examine the "req" and "res" objects passed in, 
  // to see all the good stuff they contain.

  var custno = req.body.custno;           // input parm specified in the "body" of the POST request
  var name = `Customer_name_${custno}`;   // get output customer name from input customer number

  // In this example. we'll use the function res.json() to send back the "response" as a JSON object
  var data = 
  {
    "custno": custno,
    "name"  : name
  };

  res.json(data);

}

exports.run = app;

In the Files tree, right-click on newly-created file pjstips_02_3.js, and click Properties. Mark the file as an Express Route, using HTTP method of "POST", with the Route Path as shown below.
Now, the URL to call this PJS module is http://localhost:8081/run/pjstips/pjstips_02_033. Note that you can NOT simply put this URL on a browser to "call" the module (unless you use some browser extensions). You'd need to use some tool (e.g. POSTMAN or PJS low-code module or PAPI) to send a POST request, with the input parms specified in the "body" of the request. We'll use this web service in the tips related to using low-code modules that consume a REST web service.

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