Javascript – generate JSON from “Classic” ASP on IIS

asp-classiciisjavascriptwindows 7

I have some logic I want to run on the server-side. It's implemented in Javascript, and I'd like to use it to generate and emit JSON, to allow a REST-api for a web app I'm producing.

Development is on Windows7 and IIS. I know IIS still supports ASP, which can be implemented in Javascript.

Is it possible for an ASP classic page to emit JSON?

Best Answer

Yes, no problem. It's possible to use the well-known json2.js from json.org within a Javascript-based "classic ASP" page.

Per ejemplo:

<%@ language="Javascript" %>

<script language="Javascript" runat="server" src='json2.js'></script>
<script language="Javascript" runat="server">

(function() {

    scriptEngineInfo = function () {
        var s = {
            engine : ScriptEngine(),
            version: {
                major: ScriptEngineMajorVersion(),
                minor:ScriptEngineMinorVersion()
            },
            build: ScriptEngineBuildVersion()
        };
        return s;
    }

}());


var x = scriptEngineInfo();
var d = new Date();
x.Timestamp = d.valueOf();

Response.Write (JSON.stringify(x));

</script>

Related Solutions

Javascript – Classic ASP server-side JSON library

In my experience, JSON2.js works in Classic ASP.

To use it, I do this in the .asp code:

<%@ language="Javascript" %>

<script language="javascript" runat="server" src='json2.js'></script>

<script language="javascript" runat="server">

   ... my code here....

   // use the JSON object:
   var jsonRepresentation = JSON.stringify(myObject, null, 2);

</script>

Javascript – How to remove a specific item from an array

Find the index of the array element you want to remove using indexOf, and then remove that index with splice.

The splice() method changes the contents of an array by removing existing elements and/or adding new elements.

const array = [2, 5, 9];

console.log(array);

const index = array.indexOf(5);
if (index > -1) {
  array.splice(index, 1);
}

// array = [2, 9]
console.log(array);

The second parameter of splice is the number of elements to remove. Note that splice modifies the array in place and returns a new array containing the elements that have been removed.

For the reason of completeness, here are functions. The first function removes only a single occurrence (i.e. removing the first match of 5 from [2,5,9,1,5,8,5]), while the second function removes all occurrences:

function removeItemOnce(arr, value) {
  var index = arr.indexOf(value);
  if (index > -1) {
    arr.splice(index, 1);
  }
  return arr;
}

function removeItemAll(arr, value) {
  var i = 0;
  while (i < arr.length) {
    if (arr[i] === value) {
      arr.splice(i, 1);
    } else {
      ++i;
    }
  }
  return arr;
}
// Usage
console.log(removeItemOnce([2,5,9,1,5,8,5], 5))
console.log(removeItemAll([2,5,9,1,5,8,5], 5))

In TypeScript, these functions can stay type-safe with a type parameter:

function removeItem<T>(arr: Array<T>, value: T): Array<T> { 
  const index = arr.indexOf(value);
  if (index > -1) {
    arr.splice(index, 1);
  }
  return arr;
}

Best Answer

Related Solutions

Javascript – Classic ASP server-side JSON library

Javascript – How to remove a specific item from an array

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