CC3200MODLAUNCHXL: How to obtain data from HTTP server code and how to parse JSON object in HTTP server code

Hi Michael,

Our project contains CC3200MOD as main processor and a secondary processor for business logic

The system gets commands from Android terminal, which is developed by some third party.

The commands come in JSON format and will be of the form

192.168.1.1/CommandX/getValueA/{id}                       id, if applicable

192.168.1.1/CommandY/setValueB/{id}                       id, if applicable

Both setting of values and retrieving of values should be possible.

Our reply also should be in JSON format for the Android device to understand.

With regards to above,  below are queries -

1.  Testing has been done for POST method using  Postman tool, during testing one thing is observed with respect to the value being passed

      Only 40 characters are being allowed to be passed as value, anything beyond that are truncated.

      Even the HTTP callback handler is not being called.

      I have checked to see if this is due to Postman truncating the string. But from below post mentions that more than 40 characters are

     handled seamlessly.

     Is there any restriction on the length of the string that can be handled by the webserver inside CC3200MOD.

2. Regarding GET method, the httpserver example itself was used.

    As a response, the server returned 204 and No-content.

    When I tried to print the response text and response in led_demo.html, I see the whole webpage being sent instead of LED1_OFF,LED2_OFF string.

    What could be the reason ?

     Below are the screenshots for issue 2. Also attaching the led_demo.html modified file, (modified part of the code)

HTML code of led_demo.html

var HTTPrequest = new XMLHttpRequest();
function UpdateStatus()
{
//var status = "__SL_G_ULD";
var params = "__SL_G_ULD";
//if(status.indexOf("LED1_ON") > -1)
// document.getElementById("LEDno1").checked = true;
//else
// document.getElementById("LEDno1").checked = false;
//if(status.indexOf("LED2_ON") > -1)
// document.getElementById("LEDno2").checked = true;
//else
// document.getElementById("LEDno2").checked = false;

HTTPrequest.open("GET","", true);
HTTPrequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
HTTPrequest.onreadystatechange = function()
{
if (HTTPrequest.readyState==4 && HTTPrequest.status==200)
{
console.log("response:" + HTTPrequest.status);                                                      >>>>>>>>>>>>>>>>>>>>>> Response code
if(HTTPrequest.responseText == null) {
console.log("Error");
}
else{
console.log(HTTPrequest.responseText);                                                                >>>>>>>>>>>>>>>>>>>>>> Response Text
}
}
}
HTTPrequest.send(params);
}

function ToggleLED(whichOne)

To iterate, the two issues are 

1. Token value restriction if any for the webserver

2. How to read the response of GET request.

 Thank you very much.

Regards,

Vamsi.